diff --git a/compiler/rustc_middle/src/mir/basic_blocks.rs b/compiler/rustc_middle/src/mir/basic_blocks.rs
index c32cf5f825334..107c3198525a1 100644
--- a/compiler/rustc_middle/src/mir/basic_blocks.rs
+++ b/compiler/rustc_middle/src/mir/basic_blocks.rs
@@ -20,7 +20,22 @@ pub struct BasicBlocks<'tcx> {
 // Typically 95%+ of basic blocks have 4 or fewer predecessors.
 type Predecessors = IndexVec<BasicBlock, SmallVec<[BasicBlock; 4]>>;
 
-type SwitchSources = FxHashMap<(BasicBlock, BasicBlock), SmallVec<[Option<u128>; 1]>>;
+/// Each `(target, switch)` entry in the map contains a list of switch values
+/// that lead to a `target` block from a `switch` block.
+///
+/// Note: this type is currently never instantiated, because it's only used for
+/// `BasicBlocks::switch_sources`, which is only called by backwards analyses
+/// that do `SwitchInt` handling, and we don't have any of those, not even in
+/// tests. See #95120 and #94576.
+type SwitchSources = FxHashMap<(BasicBlock, BasicBlock), SmallVec<[SwitchTargetValue; 1]>>;
+
+#[derive(Debug, Clone, Copy)]
+pub enum SwitchTargetValue {
+    // A normal switch value.
+    Normal(u128),
+    // The final "otherwise" fallback value.
+    Otherwise,
+}
 
 #[derive(Clone, Default, Debug)]
 struct Cache {
@@ -70,8 +85,8 @@ impl<'tcx> BasicBlocks<'tcx> {
         })
     }
 
-    /// `switch_sources()[&(target, switch)]` returns a list of switch
-    /// values that lead to a `target` block from a `switch` block.
+    /// Returns info about switch values that lead from one block to another
+    /// block. See `SwitchSources`.
     #[inline]
     pub fn switch_sources(&self) -> &SwitchSources {
         self.cache.switch_sources.get_or_init(|| {
@@ -82,9 +97,15 @@ impl<'tcx> BasicBlocks<'tcx> {
                 }) = &data.terminator
                 {
                     for (value, target) in targets.iter() {
-                        switch_sources.entry((target, bb)).or_default().push(Some(value));
+                        switch_sources
+                            .entry((target, bb))
+                            .or_default()
+                            .push(SwitchTargetValue::Normal(value));
                     }
-                    switch_sources.entry((targets.otherwise(), bb)).or_default().push(None);
+                    switch_sources
+                        .entry((targets.otherwise(), bb))
+                        .or_default()
+                        .push(SwitchTargetValue::Otherwise);
                 }
             }
             switch_sources
diff --git a/compiler/rustc_middle/src/mir/mod.rs b/compiler/rustc_middle/src/mir/mod.rs
index 795cfcef2d36d..cc22cabcb3e80 100644
--- a/compiler/rustc_middle/src/mir/mod.rs
+++ b/compiler/rustc_middle/src/mir/mod.rs
@@ -7,7 +7,7 @@ use std::fmt::{self, Debug, Formatter};
 use std::ops::{Index, IndexMut};
 use std::{iter, mem};
 
-pub use basic_blocks::BasicBlocks;
+pub use basic_blocks::{BasicBlocks, SwitchTargetValue};
 use either::Either;
 use polonius_engine::Atom;
 use rustc_abi::{FieldIdx, VariantIdx};
diff --git a/compiler/rustc_middle/src/mir/syntax.rs b/compiler/rustc_middle/src/mir/syntax.rs
index 9cec8d832dd14..dfd40a9535ba1 100644
--- a/compiler/rustc_middle/src/mir/syntax.rs
+++ b/compiler/rustc_middle/src/mir/syntax.rs
@@ -1015,22 +1015,30 @@ impl TerminatorKind<'_> {
 
 #[derive(Debug, Clone, TyEncodable, TyDecodable, Hash, HashStable, PartialEq)]
 pub struct SwitchTargets {
-    /// Possible values. The locations to branch to in each case
-    /// are found in the corresponding indices from the `targets` vector.
+    /// Possible values. For each value, the location to branch to is found in
+    /// the corresponding element in the `targets` vector.
     pub(super) values: SmallVec<[Pu128; 1]>,
 
-    /// Possible branch sites. The last element of this vector is used
-    /// for the otherwise branch, so targets.len() == values.len() + 1
-    /// should hold.
+    /// Possible branch targets. The last element of this vector is used for
+    /// the "otherwise" branch, so `targets.len() == values.len() + 1` always
+    /// holds.
     //
-    // This invariant is quite non-obvious and also could be improved.
-    // One way to make this invariant is to have something like this instead:
+    // Note: This invariant is non-obvious and easy to violate. This would be a
+    // more rigorous representation:
     //
-    // branches: Vec<(ConstInt, BasicBlock)>,
-    // otherwise: Option<BasicBlock> // exhaustive if None
+    //   normal: SmallVec<[(Pu128, BasicBlock); 1]>,
+    //   otherwise: BasicBlock,
     //
-    // However we’ve decided to keep this as-is until we figure a case
-    // where some other approach seems to be strictly better than other.
+    // But it's important to have the targets in a sliceable type, because
+    // target slices show up elsewhere. E.g. `TerminatorKind::InlineAsm` has a
+    // boxed slice, and `TerminatorKind::FalseEdge` has a single target that
+    // can be converted to a slice with `slice::from_ref`.
+    //
+    // Why does this matter? In functions like `TerminatorKind::successors` we
+    // return `impl Iterator` and a non-slice-of-targets representation here
+    // causes problems because multiple different concrete iterator types would
+    // be involved and we would need a boxed trait object, which requires an
+    // allocation, which is expensive if done frequently.
     pub(super) targets: SmallVec<[BasicBlock; 2]>,
 }
 
diff --git a/compiler/rustc_middle/src/ty/typeck_results.rs b/compiler/rustc_middle/src/ty/typeck_results.rs
index 1b5b791bb24ae..b8c73d2584379 100644
--- a/compiler/rustc_middle/src/ty/typeck_results.rs
+++ b/compiler/rustc_middle/src/ty/typeck_results.rs
@@ -147,9 +147,7 @@ pub struct TypeckResults<'tcx> {
     coercion_casts: ItemLocalSet,
 
     /// Set of trait imports actually used in the method resolution.
-    /// This is used for warning unused imports. During type
-    /// checking, this `Arc` should not be cloned: it must have a ref-count
-    /// of 1 so that we can insert things into the set mutably.
+    /// This is used for warning unused imports.
     pub used_trait_imports: UnordSet<LocalDefId>,
 
     /// If any errors occurred while type-checking this body,
diff --git a/compiler/rustc_mir_dataflow/src/framework/direction.rs b/compiler/rustc_mir_dataflow/src/framework/direction.rs
index 07517d7edab01..3d7f9e2d8e71b 100644
--- a/compiler/rustc_mir_dataflow/src/framework/direction.rs
+++ b/compiler/rustc_mir_dataflow/src/framework/direction.rs
@@ -1,9 +1,11 @@
 use std::ops::RangeInclusive;
 
-use rustc_middle::mir::{self, BasicBlock, CallReturnPlaces, Location, TerminatorEdges};
+use rustc_middle::mir::{
+    self, BasicBlock, CallReturnPlaces, Location, SwitchTargetValue, TerminatorEdges,
+};
 
 use super::visitor::ResultsVisitor;
-use super::{Analysis, Effect, EffectIndex, Results, SwitchIntTarget};
+use super::{Analysis, Effect, EffectIndex, Results};
 
 pub trait Direction {
     const IS_FORWARD: bool;
@@ -112,14 +114,10 @@ impl Direction for Backward {
 
                 mir::TerminatorKind::SwitchInt { targets: _, ref discr } => {
                     if let Some(mut data) = analysis.get_switch_int_data(block, discr) {
-                        let values = &body.basic_blocks.switch_sources()[&(block, pred)];
-                        let targets =
-                            values.iter().map(|&value| SwitchIntTarget { value, target: block });
-
                         let mut tmp = analysis.bottom_value(body);
-                        for target in targets {
-                            tmp.clone_from(&exit_state);
-                            analysis.apply_switch_int_edge_effect(&mut data, &mut tmp, target);
+                        for &value in &body.basic_blocks.switch_sources()[&(block, pred)] {
+                            tmp.clone_from(exit_state);
+                            analysis.apply_switch_int_edge_effect(&mut data, &mut tmp, value);
                             propagate(pred, &tmp);
                         }
                     } else {
@@ -292,12 +290,9 @@ impl Direction for Forward {
                 if let Some(mut data) = analysis.get_switch_int_data(block, discr) {
                     let mut tmp = analysis.bottom_value(body);
                     for (value, target) in targets.iter() {
-                        tmp.clone_from(&exit_state);
-                        analysis.apply_switch_int_edge_effect(
-                            &mut data,
-                            &mut tmp,
-                            SwitchIntTarget { value: Some(value), target },
-                        );
+                        tmp.clone_from(exit_state);
+                        let value = SwitchTargetValue::Normal(value);
+                        analysis.apply_switch_int_edge_effect(&mut data, &mut tmp, value);
                         propagate(target, &tmp);
                     }
 
@@ -308,7 +303,7 @@ impl Direction for Forward {
                     analysis.apply_switch_int_edge_effect(
                         &mut data,
                         exit_state,
-                        SwitchIntTarget { value: None, target: otherwise },
+                        SwitchTargetValue::Otherwise,
                     );
                     propagate(otherwise, exit_state);
                 } else {
diff --git a/compiler/rustc_mir_dataflow/src/framework/mod.rs b/compiler/rustc_mir_dataflow/src/framework/mod.rs
index 60c5cb0cae8ad..09f6cdb5c4a72 100644
--- a/compiler/rustc_mir_dataflow/src/framework/mod.rs
+++ b/compiler/rustc_mir_dataflow/src/framework/mod.rs
@@ -38,7 +38,9 @@ use rustc_data_structures::work_queue::WorkQueue;
 use rustc_index::bit_set::{DenseBitSet, MixedBitSet};
 use rustc_index::{Idx, IndexVec};
 use rustc_middle::bug;
-use rustc_middle::mir::{self, BasicBlock, CallReturnPlaces, Location, TerminatorEdges, traversal};
+use rustc_middle::mir::{
+    self, BasicBlock, CallReturnPlaces, Location, SwitchTargetValue, TerminatorEdges, traversal,
+};
 use rustc_middle::ty::TyCtxt;
 use tracing::error;
 
@@ -220,7 +222,7 @@ pub trait Analysis<'tcx> {
         &mut self,
         _data: &mut Self::SwitchIntData,
         _state: &mut Self::Domain,
-        _edge: SwitchIntTarget,
+        _value: SwitchTargetValue,
     ) {
         unreachable!();
     }
@@ -430,10 +432,5 @@ impl EffectIndex {
     }
 }
 
-pub struct SwitchIntTarget {
-    pub value: Option<u128>,
-    pub target: BasicBlock,
-}
-
 #[cfg(test)]
 mod tests;
diff --git a/compiler/rustc_mir_dataflow/src/impls/initialized.rs b/compiler/rustc_mir_dataflow/src/impls/initialized.rs
index 3be450a0b3f47..f5ffc42d52ab0 100644
--- a/compiler/rustc_mir_dataflow/src/impls/initialized.rs
+++ b/compiler/rustc_mir_dataflow/src/impls/initialized.rs
@@ -4,13 +4,14 @@ use rustc_abi::VariantIdx;
 use rustc_index::Idx;
 use rustc_index::bit_set::{DenseBitSet, MixedBitSet};
 use rustc_middle::bug;
-use rustc_middle::mir::{self, Body, CallReturnPlaces, Location, TerminatorEdges};
+use rustc_middle::mir::{
+    self, Body, CallReturnPlaces, Location, SwitchTargetValue, TerminatorEdges,
+};
 use rustc_middle::ty::util::Discr;
 use rustc_middle::ty::{self, TyCtxt};
 use tracing::{debug, instrument};
 
 use crate::drop_flag_effects::DropFlagState;
-use crate::framework::SwitchIntTarget;
 use crate::move_paths::{HasMoveData, InitIndex, InitKind, LookupResult, MoveData, MovePathIndex};
 use crate::{
     Analysis, GenKill, MaybeReachable, drop_flag_effects, drop_flag_effects_for_function_entry,
@@ -422,9 +423,9 @@ impl<'tcx> Analysis<'tcx> for MaybeInitializedPlaces<'_, 'tcx> {
         &mut self,
         data: &mut Self::SwitchIntData,
         state: &mut Self::Domain,
-        edge: SwitchIntTarget,
+        value: SwitchTargetValue,
     ) {
-        if let Some(value) = edge.value {
+        if let SwitchTargetValue::Normal(value) = value {
             // Kill all move paths that correspond to variants we know to be inactive along this
             // particular outgoing edge of a `SwitchInt`.
             drop_flag_effects::on_all_inactive_variants(
@@ -535,9 +536,9 @@ impl<'tcx> Analysis<'tcx> for MaybeUninitializedPlaces<'_, 'tcx> {
         &mut self,
         data: &mut Self::SwitchIntData,
         state: &mut Self::Domain,
-        edge: SwitchIntTarget,
+        value: SwitchTargetValue,
     ) {
-        if let Some(value) = edge.value {
+        if let SwitchTargetValue::Normal(value) = value {
             // Mark all move paths that correspond to variants other than this one as maybe
             // uninitialized (in reality, they are *definitely* uninitialized).
             drop_flag_effects::on_all_inactive_variants(
diff --git a/config.example.toml b/config.example.toml
index f5395375afe4c..fd27b24e46191 100644
--- a/config.example.toml
+++ b/config.example.toml
@@ -729,7 +729,8 @@
 #remap-debuginfo = false
 
 # Link the compiler and LLVM against `jemalloc` instead of the default libc allocator.
-# This option is only tested on Linux and OSX.
+# This option is only tested on Linux and OSX. It can also be configured per-target in the
+# [target.<tuple>] section.
 #jemalloc = false
 
 # Run tests in various test suites with the "nll compare mode" in addition to
@@ -927,6 +928,10 @@
 # order to run `x check`.
 #optimized-compiler-builtins = build.optimized-compiler-builtins (bool)
 
+# Link the compiler and LLVM against `jemalloc` instead of the default libc allocator.
+# This overrides the global `rust.jemalloc` option. See that option for more info.
+#jemalloc = rust.jemalloc (bool)
+
 # =============================================================================
 # Distribution options
 #
diff --git a/library/std/src/fs.rs b/library/std/src/fs.rs
index 83b009c86dc08..6001a2e2f391f 100644
--- a/library/std/src/fs.rs
+++ b/library/std/src/fs.rs
@@ -1229,6 +1229,9 @@ impl Seek for &File {
     fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
         self.inner.seek(pos)
     }
+    fn stream_position(&mut self) -> io::Result<u64> {
+        self.inner.tell()
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1275,6 +1278,9 @@ impl Seek for File {
     fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
         (&*self).seek(pos)
     }
+    fn stream_position(&mut self) -> io::Result<u64> {
+        (&*self).stream_position()
+    }
 }
 
 #[stable(feature = "io_traits_arc", since = "1.73.0")]
diff --git a/library/std/src/sys/pal/hermit/fs.rs b/library/std/src/sys/pal/hermit/fs.rs
index 7bc36717f34d3..d4bf84dc1854c 100644
--- a/library/std/src/sys/pal/hermit/fs.rs
+++ b/library/std/src/sys/pal/hermit/fs.rs
@@ -421,6 +421,10 @@ impl File {
         Err(Error::from_raw_os_error(22))
     }
 
+    pub fn tell(&self) -> io::Result<u64> {
+        self.seek(SeekFrom::Current(0))
+    }
+
     pub fn duplicate(&self) -> io::Result<File> {
         Err(Error::from_raw_os_error(22))
     }
diff --git a/library/std/src/sys/pal/solid/fs.rs b/library/std/src/sys/pal/solid/fs.rs
index c87a63fde8958..4e741943283d0 100644
--- a/library/std/src/sys/pal/solid/fs.rs
+++ b/library/std/src/sys/pal/solid/fs.rs
@@ -452,8 +452,11 @@ impl File {
             abi::SOLID_FS_Lseek(self.fd.raw(), pos, whence)
         })
         .map_err(|e| e.as_io_error())?;
-
         // Get the new offset
+        self.tell()
+    }
+
+    pub fn tell(&self) -> io::Result<u64> {
         unsafe {
             let mut out_offset = MaybeUninit::uninit();
             error::SolidError::err_if_negative(abi::SOLID_FS_Ftell(
diff --git a/library/std/src/sys/pal/uefi/fs.rs b/library/std/src/sys/pal/uefi/fs.rs
index 9585ec24f687d..45e93deffa3a4 100644
--- a/library/std/src/sys/pal/uefi/fs.rs
+++ b/library/std/src/sys/pal/uefi/fs.rs
@@ -258,6 +258,10 @@ impl File {
         self.0
     }
 
+    pub fn tell(&self) -> io::Result<u64> {
+        self.0
+    }
+
     pub fn duplicate(&self) -> io::Result<File> {
         self.0
     }
diff --git a/library/std/src/sys/pal/unix/fs.rs b/library/std/src/sys/pal/unix/fs.rs
index 16fb207298dbd..3df460e38b72e 100644
--- a/library/std/src/sys/pal/unix/fs.rs
+++ b/library/std/src/sys/pal/unix/fs.rs
@@ -1437,6 +1437,10 @@ impl File {
         Ok(n as u64)
     }
 
+    pub fn tell(&self) -> io::Result<u64> {
+        self.seek(SeekFrom::Current(0))
+    }
+
     pub fn duplicate(&self) -> io::Result<File> {
         self.0.duplicate().map(File)
     }
diff --git a/library/std/src/sys/pal/unsupported/fs.rs b/library/std/src/sys/pal/unsupported/fs.rs
index 9585ec24f687d..45e93deffa3a4 100644
--- a/library/std/src/sys/pal/unsupported/fs.rs
+++ b/library/std/src/sys/pal/unsupported/fs.rs
@@ -258,6 +258,10 @@ impl File {
         self.0
     }
 
+    pub fn tell(&self) -> io::Result<u64> {
+        self.0
+    }
+
     pub fn duplicate(&self) -> io::Result<File> {
         self.0
     }
diff --git a/library/std/src/sys/pal/wasi/fs.rs b/library/std/src/sys/pal/wasi/fs.rs
index 11002406d2ba2..39978346d7382 100644
--- a/library/std/src/sys/pal/wasi/fs.rs
+++ b/library/std/src/sys/pal/wasi/fs.rs
@@ -517,6 +517,10 @@ impl File {
         self.fd.seek(pos)
     }
 
+    pub fn tell(&self) -> io::Result<u64> {
+        self.fd.tell()
+    }
+
     pub fn duplicate(&self) -> io::Result<File> {
         // https://github.com/CraneStation/wasmtime/blob/master/docs/WASI-rationale.md#why-no-dup
         unsupported()
diff --git a/library/std/src/sys/pal/windows/fs.rs b/library/std/src/sys/pal/windows/fs.rs
index ff02737dcf827..0ddce30cf8e44 100644
--- a/library/std/src/sys/pal/windows/fs.rs
+++ b/library/std/src/sys/pal/windows/fs.rs
@@ -631,6 +631,10 @@ impl File {
         Ok(newpos as u64)
     }
 
+    pub fn tell(&self) -> io::Result<u64> {
+        self.seek(SeekFrom::Current(0))
+    }
+
     pub fn duplicate(&self) -> io::Result<File> {
         Ok(Self { handle: self.handle.try_clone()? })
     }
diff --git a/src/bootstrap/src/core/build_steps/compile.rs b/src/bootstrap/src/core/build_steps/compile.rs
index c62c36390eaeb..aa08dd7e42488 100644
--- a/src/bootstrap/src/core/build_steps/compile.rs
+++ b/src/bootstrap/src/core/build_steps/compile.rs
@@ -1341,7 +1341,7 @@ pub fn rustc_cargo_env(
 
     // Build jemalloc on AArch64 with support for page sizes up to 64K
     // See: https://github.com/rust-lang/rust/pull/135081
-    if builder.config.jemalloc
+    if builder.config.jemalloc(target)
         && target.starts_with("aarch64")
         && env::var_os("JEMALLOC_SYS_WITH_LG_PAGE").is_none()
     {
diff --git a/src/bootstrap/src/core/build_steps/dist.rs b/src/bootstrap/src/core/build_steps/dist.rs
index 509ee9e1acf07..85b224771bb31 100644
--- a/src/bootstrap/src/core/build_steps/dist.rs
+++ b/src/bootstrap/src/core/build_steps/dist.rs
@@ -21,7 +21,7 @@ use tracing::instrument;
 
 use crate::core::build_steps::doc::DocumentationFormat;
 use crate::core::build_steps::tool::{self, Tool};
-use crate::core::build_steps::vendor::default_paths_to_vendor;
+use crate::core::build_steps::vendor::{VENDOR_DIR, Vendor};
 use crate::core::build_steps::{compile, llvm};
 use crate::core::builder::{Builder, Kind, RunConfig, ShouldRun, Step};
 use crate::core::config::TargetSelection;
@@ -1052,19 +1052,6 @@ impl Step for PlainSourceTarball {
         if builder.config.dist_vendor {
             builder.require_and_update_all_submodules();
 
-            // Vendor all Cargo dependencies
-            let mut cmd = command(&builder.initial_cargo);
-            cmd.arg("vendor").arg("--versioned-dirs");
-
-            for (p, _) in default_paths_to_vendor(builder) {
-                cmd.arg("--sync").arg(p);
-            }
-
-            cmd
-                // Will read the libstd Cargo.toml which uses the unstable `public-dependency` feature.
-                .env("RUSTC_BOOTSTRAP", "1")
-                .current_dir(plain_dst_src);
-
             // Vendor packages that are required by opt-dist to collect PGO profiles.
             let pkgs_for_pgo_training = build_helper::LLVM_PGO_CRATES
                 .iter()
@@ -1076,15 +1063,18 @@ impl Step for PlainSourceTarball {
                     manifest_path.push("Cargo.toml");
                     manifest_path
                 });
-            for manifest_path in pkgs_for_pgo_training {
-                cmd.arg("--sync").arg(manifest_path);
-            }
 
-            let config = cmd.run_capture(builder).stdout();
+            // Vendor all Cargo dependencies
+            let vendor = builder.ensure(Vendor {
+                sync_args: pkgs_for_pgo_training.collect(),
+                versioned_dirs: true,
+                root_dir: plain_dst_src.into(),
+                output_dir: VENDOR_DIR.into(),
+            });
 
             let cargo_config_dir = plain_dst_src.join(".cargo");
             builder.create_dir(&cargo_config_dir);
-            builder.create(&cargo_config_dir.join("config.toml"), &config);
+            builder.create(&cargo_config_dir.join("config.toml"), &vendor.config);
         }
 
         // Delete extraneous directories
diff --git a/src/bootstrap/src/core/build_steps/doc.rs b/src/bootstrap/src/core/build_steps/doc.rs
index 23bb47dcc5863..aee56fe78e21f 100644
--- a/src/bootstrap/src/core/build_steps/doc.rs
+++ b/src/bootstrap/src/core/build_steps/doc.rs
@@ -577,6 +577,10 @@ impl Step for Std {
 
     fn make_run(run: RunConfig<'_>) {
         let crates = compile::std_crates_for_run_make(&run);
+        let target_is_no_std = run.builder.no_std(run.target).unwrap_or(false);
+        if crates.is_empty() && target_is_no_std {
+            return;
+        }
         run.builder.ensure(Std {
             stage: run.builder.top_stage,
             target: run.target,
diff --git a/src/bootstrap/src/core/build_steps/run.rs b/src/bootstrap/src/core/build_steps/run.rs
index 167b8a5b168c9..2b17e02cae5a4 100644
--- a/src/bootstrap/src/core/build_steps/run.rs
+++ b/src/bootstrap/src/core/build_steps/run.rs
@@ -9,6 +9,7 @@ use crate::Mode;
 use crate::core::build_steps::dist::distdir;
 use crate::core::build_steps::test;
 use crate::core::build_steps::tool::{self, SourceType, Tool};
+use crate::core::build_steps::vendor::{Vendor, default_paths_to_vendor};
 use crate::core::builder::{Builder, Kind, RunConfig, ShouldRun, Step};
 use crate::core::config::TargetSelection;
 use crate::core::config::flags::get_completion;
@@ -212,11 +213,39 @@ impl Step for GenerateCopyright {
         let dest = builder.out.join("COPYRIGHT.html");
         let dest_libstd = builder.out.join("COPYRIGHT-library.html");
 
+        let paths_to_vendor = default_paths_to_vendor(builder);
+        for (_, submodules) in &paths_to_vendor {
+            for submodule in submodules {
+                builder.build.require_submodule(submodule, None);
+            }
+        }
+        let cargo_manifests = paths_to_vendor
+            .into_iter()
+            .map(|(path, _submodules)| path.to_str().unwrap().to_string())
+            .inspect(|path| assert!(!path.contains(','), "{path} contains a comma in its name"))
+            .collect::<Vec<_>>()
+            .join(",");
+
+        let vendored_sources = if let Some(path) = builder.vendored_crates_path() {
+            path
+        } else {
+            let cache_dir = builder.out.join("tmp").join("generate-copyright-vendor");
+            builder.ensure(Vendor {
+                sync_args: Vec::new(),
+                versioned_dirs: true,
+                root_dir: builder.src.clone(),
+                output_dir: cache_dir.clone(),
+            });
+            cache_dir
+        };
+
         let mut cmd = builder.tool_cmd(Tool::GenerateCopyright);
+        cmd.env("CARGO_MANIFESTS", &cargo_manifests);
         cmd.env("LICENSE_METADATA", &license_metadata);
         cmd.env("DEST", &dest);
         cmd.env("DEST_LIBSTD", &dest_libstd);
-        cmd.env("OUT_DIR", &builder.out);
+        cmd.env("SRC_DIR", &builder.src);
+        cmd.env("VENDOR_DIR", &vendored_sources);
         cmd.env("CARGO", &builder.initial_cargo);
         // it is important that generate-copyright runs from the root of the
         // source tree, because it uses relative paths
diff --git a/src/bootstrap/src/core/build_steps/tool.rs b/src/bootstrap/src/core/build_steps/tool.rs
index a54db9d781573..75bfff340862a 100644
--- a/src/bootstrap/src/core/build_steps/tool.rs
+++ b/src/bootstrap/src/core/build_steps/tool.rs
@@ -654,7 +654,7 @@ impl Step for Rustdoc {
         // to build rustdoc.
         //
         let mut features = Vec::new();
-        if builder.config.jemalloc {
+        if builder.config.jemalloc(target) {
             features.push("jemalloc".to_string());
         }
 
diff --git a/src/bootstrap/src/core/build_steps/vendor.rs b/src/bootstrap/src/core/build_steps/vendor.rs
index 26d0f100ffd52..410dbc04f0306 100644
--- a/src/bootstrap/src/core/build_steps/vendor.rs
+++ b/src/bootstrap/src/core/build_steps/vendor.rs
@@ -4,6 +4,8 @@ use crate::core::build_steps::tool::SUBMODULES_FOR_RUSTBOOK;
 use crate::core::builder::{Builder, RunConfig, ShouldRun, Step};
 use crate::utils::exec::command;
 
+pub const VENDOR_DIR: &str = "vendor";
+
 /// Returns the cargo workspaces to vendor for `x vendor` and dist tarballs.
 ///
 /// Returns a `Vec` of `(path_to_manifest, submodules_required)` where
@@ -29,13 +31,14 @@ pub fn default_paths_to_vendor(builder: &Builder<'_>) -> Vec<(PathBuf, Vec<&'sta
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
 pub(crate) struct Vendor {
-    sync_args: Vec<PathBuf>,
-    versioned_dirs: bool,
-    root_dir: PathBuf,
+    pub(crate) sync_args: Vec<PathBuf>,
+    pub(crate) versioned_dirs: bool,
+    pub(crate) root_dir: PathBuf,
+    pub(crate) output_dir: PathBuf,
 }
 
 impl Step for Vendor {
-    type Output = ();
+    type Output = VendorOutput;
     const DEFAULT: bool = true;
     const ONLY_HOSTS: bool = true;
 
@@ -48,10 +51,13 @@ impl Step for Vendor {
             sync_args: run.builder.config.cmd.vendor_sync_args(),
             versioned_dirs: run.builder.config.cmd.vendor_versioned_dirs(),
             root_dir: run.builder.src.clone(),
+            output_dir: run.builder.src.join(VENDOR_DIR),
         });
     }
 
     fn run(self, builder: &Builder<'_>) -> Self::Output {
+        builder.info(&format!("Vendoring sources to {:?}", self.root_dir));
+
         let mut cmd = command(&builder.initial_cargo);
         cmd.arg("vendor");
 
@@ -81,8 +87,14 @@ impl Step for Vendor {
         // which uses the unstable `public-dependency` feature.
         cmd.env("RUSTC_BOOTSTRAP", "1");
 
-        cmd.current_dir(self.root_dir);
+        cmd.current_dir(self.root_dir).arg(&self.output_dir);
 
-        cmd.run(builder);
+        let config = cmd.run_capture_stdout(builder);
+        VendorOutput { config: config.stdout() }
     }
 }
+
+#[derive(Debug, Clone)]
+pub(crate) struct VendorOutput {
+    pub(crate) config: String,
+}
diff --git a/src/bootstrap/src/core/builder/cargo.rs b/src/bootstrap/src/core/builder/cargo.rs
index 59680af00622f..1ec3e601cad19 100644
--- a/src/bootstrap/src/core/builder/cargo.rs
+++ b/src/bootstrap/src/core/builder/cargo.rs
@@ -924,8 +924,7 @@ impl Builder<'_> {
 
         if self.config.rust_remap_debuginfo {
             let mut env_var = OsString::new();
-            if self.config.vendor {
-                let vendor = self.build.src.join("vendor");
+            if let Some(vendor) = self.build.vendored_crates_path() {
                 env_var.push(vendor);
                 env_var.push("=/rust/deps");
             } else {
diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index d27a8b155df73..64a510240f837 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -325,6 +325,9 @@ pub struct Config {
     pub hosts: Vec<TargetSelection>,
     pub targets: Vec<TargetSelection>,
     pub local_rebuild: bool,
+    #[cfg(not(test))]
+    jemalloc: bool,
+    #[cfg(test)]
     pub jemalloc: bool,
     pub control_flow_guard: bool,
     pub ehcont_guard: bool,
@@ -643,6 +646,7 @@ pub struct Target {
     pub no_std: bool,
     pub codegen_backends: Option<Vec<String>>,
     pub optimized_compiler_builtins: Option<bool>,
+    pub jemalloc: Option<bool>,
 }
 
 impl Target {
@@ -1234,6 +1238,7 @@ define_config! {
         codegen_backends: Option<Vec<String>> = "codegen-backends",
         runner: Option<String> = "runner",
         optimized_compiler_builtins: Option<bool> = "optimized-compiler-builtins",
+        jemalloc: Option<bool> = "jemalloc",
     }
 }
 
@@ -2161,6 +2166,7 @@ impl Config {
                 target.profiler = cfg.profiler;
                 target.rpath = cfg.rpath;
                 target.optimized_compiler_builtins = cfg.optimized_compiler_builtins;
+                target.jemalloc = cfg.jemalloc;
 
                 if let Some(ref backends) = cfg.codegen_backends {
                     let available_backends = ["llvm", "cranelift", "gcc"];
@@ -2726,6 +2732,10 @@ impl Config {
             .unwrap_or(&self.rust_codegen_backends)
     }
 
+    pub fn jemalloc(&self, target: TargetSelection) -> bool {
+        self.target_config.get(&target).and_then(|cfg| cfg.jemalloc).unwrap_or(self.jemalloc)
+    }
+
     pub fn default_codegen_backend(&self, target: TargetSelection) -> Option<String> {
         self.codegen_backends(target).first().cloned()
     }
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index 62ddc7d682ee8..dfaf0418d9a2b 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -50,6 +50,8 @@ pub use utils::change_tracker::{
     CONFIG_CHANGE_HISTORY, find_recent_config_change_ids, human_readable_changes,
 };
 
+use crate::core::build_steps::vendor::VENDOR_DIR;
+
 const LLVM_TOOLS: &[&str] = &[
     "llvm-cov",      // used to generate coverage report
     "llvm-nm",       // used to inspect binaries; it shows symbol names, their sizes and visibility
@@ -686,7 +688,7 @@ impl Build {
             crates.is_empty() || possible_features_by_crates.contains(feature)
         };
         let mut features = vec![];
-        if self.config.jemalloc && check("jemalloc") {
+        if self.config.jemalloc(target) && check("jemalloc") {
             features.push("jemalloc");
         }
         if (self.config.llvm_enabled(target) || kind == Kind::Check) && check("llvm") {
@@ -791,6 +793,11 @@ impl Build {
         self.out.join(target).join("md-doc")
     }
 
+    /// Path to the vendored Rust crates.
+    fn vendored_crates_path(&self) -> Option<PathBuf> {
+        if self.config.vendor { Some(self.src.join(VENDOR_DIR)) } else { None }
+    }
+
     /// Returns `true` if this is an external version of LLVM not managed by bootstrap.
     /// In particular, we expect llvm sources to be available when this is false.
     ///
diff --git a/src/bootstrap/src/utils/change_tracker.rs b/src/bootstrap/src/utils/change_tracker.rs
index 9b23cf1843ef5..f215c3f6d0b39 100644
--- a/src/bootstrap/src/utils/change_tracker.rs
+++ b/src/bootstrap/src/utils/change_tracker.rs
@@ -350,4 +350,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Info,
         summary: "The llvm.ccache option has moved to build.ccache. llvm.ccache is now deprecated.",
     },
+    ChangeInfo {
+        change_id: 137170,
+        severity: ChangeSeverity::Info,
+        summary: "It is now possible to configure `jemalloc` for each target",
+    },
 ];
diff --git a/src/ci/docker/scripts/rfl-build.sh b/src/ci/docker/scripts/rfl-build.sh
index 3eb85ab215e0b..573821c3e59cd 100755
--- a/src/ci/docker/scripts/rfl-build.sh
+++ b/src/ci/docker/scripts/rfl-build.sh
@@ -2,7 +2,7 @@
 
 set -euo pipefail
 
-LINUX_VERSION=50e57739141b41f731ab31f8380821c7969f9dc4
+LINUX_VERSION=v6.14-rc3
 
 # Build rustc, rustdoc, cargo, clippy-driver and rustfmt
 ../x.py build --stage 2 library rustdoc clippy rustfmt
@@ -28,7 +28,7 @@ rm -rf linux || true
 # Download Linux at a specific commit
 mkdir -p linux
 git -C linux init
-git -C linux remote add origin https://github.com/Darksonn/linux.git
+git -C linux remote add origin https://github.com/Rust-for-Linux/linux.git
 git -C linux fetch --depth 1 origin ${LINUX_VERSION}
 git -C linux checkout FETCH_HEAD
 
diff --git a/src/doc/rustc/src/platform-support/loongarch-none.md b/src/doc/rustc/src/platform-support/loongarch-none.md
index 110a7cc3424d4..bafa85c26e290 100644
--- a/src/doc/rustc/src/platform-support/loongarch-none.md
+++ b/src/doc/rustc/src/platform-support/loongarch-none.md
@@ -32,7 +32,7 @@ By default, code generated with the soft-float target should run on any
 LoongArch64 hardware, with the hard-float target additionally requiring an FPU;
 enabling additional target features may raise this baseline.
 
-Code generated with the targets will use the `small` code model by default.
+Code generated with the targets will use the `medium` code model by default.
 You can change this using the `-C code-model=` option to rustc.
 
 On `loongarch64-unknown-none*`, `extern "C"` uses the [architecture's standard calling convention][lapcs].
diff --git a/src/tools/generate-copyright/src/cargo_metadata.rs b/src/tools/generate-copyright/src/cargo_metadata.rs
index 51e353e9b229f..b717bd53eb1a7 100644
--- a/src/tools/generate-copyright/src/cargo_metadata.rs
+++ b/src/tools/generate-copyright/src/cargo_metadata.rs
@@ -11,10 +11,6 @@ pub enum Error {
     Io(#[from] std::io::Error),
     #[error("Failed get output from cargo-metadata: {0:?}")]
     GettingMetadata(#[from] cargo_metadata::Error),
-    #[error("Failed to run cargo vendor: {0:?}")]
-    LaunchingVendor(std::io::Error),
-    #[error("Failed to complete cargo vendor")]
-    RunningVendor,
     #[error("Bad path {0:?} whilst scraping files")]
     Scraping(PathBuf),
 }
@@ -43,25 +39,19 @@ pub struct PackageMetadata {
     pub is_in_libstd: Option<bool>,
 }
 
-/// Use `cargo metadata` and `cargo vendor` to get a list of dependencies and their license data.
+/// Use `cargo metadata` to get a list of dependencies and their license data. License files will
+/// also be pulled from the vendor path (generated by bootstrap).
 ///
-/// This will involve running `cargo vendor` into `vendor_path` so we can
-/// grab the license files.
-///
-/// Any dependency with a path beginning with `root_path` is ignored, as we
-/// assume `reuse` has covered it already.
+/// Any dependency with a path beginning with `root_path` is ignored, as we assume `reuse` has
+/// covered it already.
 pub fn get_metadata_and_notices(
     cargo: &Path,
     vendor_path: &Path,
     root_path: &Path,
-    manifest_paths: &[&Path],
+    manifest_paths: &[PathBuf],
 ) -> Result<BTreeMap<Package, PackageMetadata>, Error> {
     let mut output = get_metadata(cargo, root_path, manifest_paths)?;
 
-    // Now do a cargo-vendor and grab everything
-    println!("Vendoring deps into {}...", vendor_path.display());
-    run_cargo_vendor(cargo, &vendor_path, manifest_paths)?;
-
     // Now for each dependency we found, go and grab any important looking files
     for (package, metadata) in output.iter_mut() {
         load_important_files(package, metadata, &vendor_path)?;
@@ -77,7 +67,7 @@ pub fn get_metadata_and_notices(
 pub fn get_metadata(
     cargo: &Path,
     root_path: &Path,
-    manifest_paths: &[&Path],
+    manifest_paths: &[PathBuf],
 ) -> Result<BTreeMap<Package, PackageMetadata>, Error> {
     let mut output = BTreeMap::new();
     // Look at the metadata for each manifest
@@ -113,28 +103,6 @@ pub fn get_metadata(
     Ok(output)
 }
 
-/// Run cargo-vendor, fetching into the given dir
-fn run_cargo_vendor(cargo: &Path, dest: &Path, manifest_paths: &[&Path]) -> Result<(), Error> {
-    let mut vendor_command = std::process::Command::new(cargo);
-    vendor_command.env("RUSTC_BOOTSTRAP", "1");
-    vendor_command.arg("vendor");
-    vendor_command.arg("--quiet");
-    vendor_command.arg("--versioned-dirs");
-    for manifest_path in manifest_paths {
-        vendor_command.arg("-s");
-        vendor_command.arg(manifest_path);
-    }
-    vendor_command.arg(dest);
-
-    let vendor_status = vendor_command.status().map_err(Error::LaunchingVendor)?;
-
-    if !vendor_status.success() {
-        return Err(Error::RunningVendor);
-    }
-
-    Ok(())
-}
-
 /// Add important files off disk into this dependency.
 ///
 /// Maybe one-day Cargo.toml will contain enough information that we don't need
diff --git a/src/tools/generate-copyright/src/main.rs b/src/tools/generate-copyright/src/main.rs
index 7a014989e6880..79e90d88f4446 100644
--- a/src/tools/generate-copyright/src/main.rs
+++ b/src/tools/generate-copyright/src/main.rs
@@ -17,29 +17,36 @@ mod cargo_metadata;
 fn main() -> Result<(), Error> {
     let dest_file = env_path("DEST")?;
     let libstd_dest_file = env_path("DEST_LIBSTD")?;
-    let out_dir = env_path("OUT_DIR")?;
+    let src_dir = env_path("SRC_DIR")?;
+    let vendor_dir = env_path("VENDOR_DIR")?;
     let cargo = env_path("CARGO")?;
     let license_metadata = env_path("LICENSE_METADATA")?;
 
-    let root_path = std::path::absolute(".")?;
+    let cargo_manifests = env_string("CARGO_MANIFESTS")?
+        .split(",")
+        .map(|manifest| manifest.into())
+        .collect::<Vec<PathBuf>>();
+    let library_manifests = cargo_manifests
+        .iter()
+        .filter(|path| {
+            if let Ok(stripped) = path.strip_prefix(&src_dir) {
+                stripped.starts_with("library")
+            } else {
+                panic!("manifest {path:?} not relative to source dir {src_dir:?}");
+            }
+        })
+        .cloned()
+        .collect::<Vec<_>>();
 
     // Scan Cargo dependencies
-    let mut collected_cargo_metadata = cargo_metadata::get_metadata_and_notices(
-        &cargo,
-        &out_dir.join("vendor"),
-        &root_path,
-        &[
-            Path::new("./Cargo.toml"),
-            Path::new("./src/tools/cargo/Cargo.toml"),
-            Path::new("./library/Cargo.toml"),
-        ],
-    )?;
+    let mut collected_cargo_metadata =
+        cargo_metadata::get_metadata_and_notices(&cargo, &vendor_dir, &src_dir, &cargo_manifests)?;
 
     let library_collected_cargo_metadata = cargo_metadata::get_metadata_and_notices(
         &cargo,
-        &out_dir.join("library-vendor"),
-        &root_path,
-        &[Path::new("./library/Cargo.toml")],
+        &vendor_dir,
+        &src_dir,
+        &library_manifests,
     )?;
 
     for (key, value) in collected_cargo_metadata.iter_mut() {
@@ -54,7 +61,7 @@ fn main() -> Result<(), Error> {
     let library_collected_tree_metadata = Metadata {
         files: collected_tree_metadata
             .files
-            .trim_clone(&Path::new("./library"), &Path::new("."))
+            .trim_clone(&src_dir.join("library"), &src_dir)
             .unwrap(),
     };
 
@@ -193,6 +200,17 @@ struct License {
     copyright: Vec<String>,
 }
 
+/// Grab an environment variable as string, or fail nicely.
+fn env_string(var: &str) -> Result<String, Error> {
+    match std::env::var(var) {
+        Ok(var) => Ok(var),
+        Err(std::env::VarError::NotUnicode(_)) => {
+            anyhow::bail!("environment variable {var} is not utf-8")
+        }
+        Err(std::env::VarError::NotPresent) => anyhow::bail!("missing environment variable {var}"),
+    }
+}
+
 /// Grab an environment variable as a PathBuf, or fail nicely.
 fn env_path(var: &str) -> Result<PathBuf, Error> {
     if let Some(var) = std::env::var_os(var) {
diff --git a/src/tools/rust-analyzer/.github/workflows/ci.yaml b/src/tools/rust-analyzer/.github/workflows/ci.yaml
index ec33009239c4f..81b55712d7f39 100644
--- a/src/tools/rust-analyzer/.github/workflows/ci.yaml
+++ b/src/tools/rust-analyzer/.github/workflows/ci.yaml
@@ -64,7 +64,11 @@ jobs:
         run: |
           rustup update --no-self-update ${{ env.RUST_CHANNEL }}
           rustup default ${{ env.RUST_CHANNEL }}
-          rustup component add --toolchain ${{ env.RUST_CHANNEL }} rustfmt rust-src
+          rustup component add --toolchain ${{ env.RUST_CHANNEL }} rust-src
+          # We always use a nightly rustfmt, regardless of channel, because we need
+          # --file-lines.
+          rustup toolchain add nightly --profile minimal
+          rustup component add --toolchain nightly rustfmt
       # https://github.com/actions-rust-lang/setup-rust-toolchain/blob/main/rust.json
       - name: Install Rust Problem Matcher
         if: matrix.os == 'ubuntu-latest'
diff --git a/src/tools/rust-analyzer/Cargo.lock b/src/tools/rust-analyzer/Cargo.lock
index 98268d8f84449..6d7f6042decab 100644
--- a/src/tools/rust-analyzer/Cargo.lock
+++ b/src/tools/rust-analyzer/Cargo.lock
@@ -1514,9 +1514,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_abi"
-version = "0.94.0"
+version = "0.95.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2fa4333df7b71217edb44a36702cafd2bcfc9850677bdf78b32c9f2c98e5df40"
+checksum = "b40c4e339b71a8f075a829b1acaf32f870a11b466d9b8623d50b0ce33e65af95"
 dependencies = [
  "bitflags 2.7.0",
  "ra-ap-rustc_index",
@@ -1525,9 +1525,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_index"
-version = "0.94.0"
+version = "0.95.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d200275ff3d952cc11108f4dc6a692473659758623d63f2bdcea6104a7f1cec8"
+checksum = "872072e2ba11d11147ebe9fde1608fe7f7d9b5c51dac524af28ee07c6dade468"
 dependencies = [
  "ra-ap-rustc_index_macros",
  "smallvec",
@@ -1535,9 +1535,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_index_macros"
-version = "0.94.0"
+version = "0.95.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06eb63df8c1ce2dcb07647305bed811c9c5ebd157def01a81c1b9479b8592b3b"
+checksum = "ffcd77debcaf2ad690a57c2d041c11eb33fe66869754b2c5f35c52954b46af0c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1546,9 +1546,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_lexer"
-version = "0.94.0"
+version = "0.95.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7a4d402b2f85650e8c1f78e2e2defc241b03948d6e30d9f5254c9b82755cc4d"
+checksum = "49265cdf8823f8d246e476c79c60bd6e5b551c81ae76e1c8d6a5e0dc73df0bca"
 dependencies = [
  "memchr",
  "unicode-properties",
@@ -1557,9 +1557,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_parse_format"
-version = "0.94.0"
+version = "0.95.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a23a382dbe392beb26360c1a8ce9193155ef74eeac59bcda0fa0a233e047323a"
+checksum = "b3da239fdc971176de0db45cb631d71475b52033a3d0027d91964da7be89eee6"
 dependencies = [
  "ra-ap-rustc_index",
  "ra-ap-rustc_lexer",
@@ -1567,9 +1567,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_pattern_analysis"
-version = "0.94.0"
+version = "0.95.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d746955d67f315ab79767f1d0bbc17fee4f0970d4a00b9ad76bf09cc7d3cd17e"
+checksum = "56057d08fdfa0d95494e461bbdd5d4b3fdb349cca6be05ad7759bc964be1b8d4"
 dependencies = [
  "ra-ap-rustc_index",
  "rustc-hash 2.0.0",
diff --git a/src/tools/rust-analyzer/Cargo.toml b/src/tools/rust-analyzer/Cargo.toml
index 44c628e8294d1..924ffb8dd21d5 100644
--- a/src/tools/rust-analyzer/Cargo.toml
+++ b/src/tools/rust-analyzer/Cargo.toml
@@ -87,11 +87,11 @@ vfs-notify = { path = "./crates/vfs-notify", version = "0.0.0" }
 vfs = { path = "./crates/vfs", version = "0.0.0" }
 edition = { path = "./crates/edition", version = "0.0.0" }
 
-ra-ap-rustc_lexer = { version = "0.94", default-features = false }
-ra-ap-rustc_parse_format = { version = "0.94", default-features = false }
-ra-ap-rustc_index = { version = "0.94", default-features = false }
-ra-ap-rustc_abi = { version = "0.94", default-features = false }
-ra-ap-rustc_pattern_analysis = { version = "0.94", default-features = false }
+ra-ap-rustc_lexer = { version = "0.95", default-features = false }
+ra-ap-rustc_parse_format = { version = "0.95", default-features = false }
+ra-ap-rustc_index = { version = "0.95", default-features = false }
+ra-ap-rustc_abi = { version = "0.95", default-features = false }
+ra-ap-rustc_pattern_analysis = { version = "0.95", default-features = false }
 
 # local crates that aren't published to crates.io. These should not have versions.
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/data.rs b/src/tools/rust-analyzer/crates/hir-def/src/data.rs
index c5bbd4edba9e4..bec662787728c 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/data.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/data.rs
@@ -250,6 +250,7 @@ bitflags::bitflags! {
         const RUSTC_HAS_INCOHERENT_INHERENT_IMPLS = 1 << 3;
         const SKIP_ARRAY_DURING_METHOD_DISPATCH = 1 << 4;
         const SKIP_BOXED_SLICE_DURING_METHOD_DISPATCH = 1 << 5;
+        const RUSTC_PAREN_SUGAR = 1 << 6;
     }
 }
 
@@ -294,6 +295,9 @@ impl TraitData {
         if attrs.by_key(&sym::rustc_has_incoherent_inherent_impls).exists() {
             flags |= TraitFlags::RUSTC_HAS_INCOHERENT_INHERENT_IMPLS;
         }
+        if attrs.by_key(&sym::rustc_paren_sugar).exists() {
+            flags |= TraitFlags::RUSTC_PAREN_SUGAR;
+        }
 
         let mut skip_array_during_method_dispatch =
             attrs.by_key(&sym::rustc_skip_array_during_method_dispatch).exists();
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/dyn_map.rs b/src/tools/rust-analyzer/crates/hir-def/src/dyn_map.rs
index 0f73595347b12..e9318d146ddf3 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/dyn_map.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/dyn_map.rs
@@ -31,9 +31,9 @@ pub mod keys {
 
     use crate::{
         dyn_map::{DynMap, Policy},
-        BlockId, ConstId, EnumId, EnumVariantId, ExternCrateId, FieldId, FunctionId, ImplId,
-        LifetimeParamId, Macro2Id, MacroRulesId, ProcMacroId, StaticId, StructId, TraitAliasId,
-        TraitId, TypeAliasId, TypeOrConstParamId, UnionId, UseId,
+        BlockId, ConstId, EnumId, EnumVariantId, ExternBlockId, ExternCrateId, FieldId, FunctionId,
+        ImplId, LifetimeParamId, Macro2Id, MacroRulesId, ProcMacroId, StaticId, StructId,
+        TraitAliasId, TraitId, TypeAliasId, TypeOrConstParamId, UnionId, UseId,
     };
 
     pub type Key<K, V> = crate::dyn_map::Key<AstPtr<K>, V, AstPtrPolicy<K, V>>;
@@ -44,6 +44,7 @@ pub mod keys {
     pub const STATIC: Key<ast::Static, StaticId> = Key::new();
     pub const TYPE_ALIAS: Key<ast::TypeAlias, TypeAliasId> = Key::new();
     pub const IMPL: Key<ast::Impl, ImplId> = Key::new();
+    pub const EXTERN_BLOCK: Key<ast::ExternBlock, ExternBlockId> = Key::new();
     pub const TRAIT: Key<ast::Trait, TraitId> = Key::new();
     pub const TRAIT_ALIAS: Key<ast::TraitAlias, TraitAliasId> = Key::new();
     pub const STRUCT: Key<ast::Struct, StructId> = Key::new();
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
index 9df6eaade757a..5ff6a7ffe5669 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
@@ -112,9 +112,9 @@ pub struct ExpressionStoreSourceMap {
     // AST expressions can create patterns in destructuring assignments. Therefore, `ExprSource` can also map
     // to `PatId`, and `PatId` can also map to `ExprSource` (the other way around is unaffected).
     expr_map: FxHashMap<ExprSource, ExprOrPatId>,
-    expr_map_back: ArenaMap<ExprId, ExprSource>,
+    expr_map_back: ArenaMap<ExprId, ExprOrPatSource>,
 
-    pat_map: FxHashMap<PatSource, PatId>,
+    pat_map: FxHashMap<PatSource, ExprOrPatId>,
     pat_map_back: ArenaMap<PatId, ExprOrPatSource>,
 
     label_map: FxHashMap<LabelSource, LabelId>,
@@ -606,12 +606,12 @@ impl Index<TypeRefId> for ExpressionStore {
 impl ExpressionStoreSourceMap {
     pub fn expr_or_pat_syntax(&self, id: ExprOrPatId) -> Result<ExprOrPatSource, SyntheticSyntax> {
         match id {
-            ExprOrPatId::ExprId(id) => self.expr_syntax(id).map(|it| it.map(AstPtr::wrap_left)),
+            ExprOrPatId::ExprId(id) => self.expr_syntax(id),
             ExprOrPatId::PatId(id) => self.pat_syntax(id),
         }
     }
 
-    pub fn expr_syntax(&self, expr: ExprId) -> Result<ExprSource, SyntheticSyntax> {
+    pub fn expr_syntax(&self, expr: ExprId) -> Result<ExprOrPatSource, SyntheticSyntax> {
         self.expr_map_back.get(expr).cloned().ok_or(SyntheticSyntax)
     }
 
@@ -633,7 +633,7 @@ impl ExpressionStoreSourceMap {
         self.pat_map_back.get(pat).cloned().ok_or(SyntheticSyntax)
     }
 
-    pub fn node_pat(&self, node: InFile<&ast::Pat>) -> Option<PatId> {
+    pub fn node_pat(&self, node: InFile<&ast::Pat>) -> Option<ExprOrPatId> {
         self.pat_map.get(&node.map(AstPtr::new)).cloned()
     }
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs
index 88f770da02a4e..6e505a6b1126e 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs
@@ -44,8 +44,8 @@ use crate::{
             FormatPlaceholder, FormatSign, FormatTrait,
         },
         Array, Binding, BindingAnnotation, BindingId, BindingProblems, CaptureBy, ClosureKind,
-        Expr, ExprId, Item, Label, LabelId, Literal, LiteralOrConst, MatchArm, Movability,
-        OffsetOf, Pat, PatId, RecordFieldPat, RecordLitField, Statement,
+        Expr, ExprId, Item, Label, LabelId, Literal, MatchArm, Movability, OffsetOf, Pat, PatId,
+        RecordFieldPat, RecordLitField, Statement,
     },
     item_scope::BuiltinShadowMode,
     lang_item::LangItem,
@@ -1784,23 +1784,33 @@ impl ExprCollector<'_> {
                         self.collect_macro_call(call, macro_ptr, true, |this, expanded_pat| {
                             this.collect_pat_opt(expanded_pat, binding_list)
                         });
-                    self.source_map.pat_map.insert(src, pat);
+                    self.source_map.pat_map.insert(src, pat.into());
                     return pat;
                 }
                 None => Pat::Missing,
             },
-            // FIXME: implement in a way that also builds source map and calculates assoc resolutions in type inference.
             ast::Pat::RangePat(p) => {
-                let mut range_part_lower = |p: Option<ast::Pat>| {
-                    p.and_then(|it| match &it {
-                        ast::Pat::LiteralPat(it) => {
-                            Some(Box::new(LiteralOrConst::Literal(pat_literal_to_hir(it)?.0)))
+                let mut range_part_lower = |p: Option<ast::Pat>| -> Option<ExprId> {
+                    p.and_then(|it| {
+                        let ptr = PatPtr::new(&it);
+                        match &it {
+                            ast::Pat::LiteralPat(it) => Some(self.alloc_expr_from_pat(
+                                Expr::Literal(pat_literal_to_hir(it)?.0),
+                                ptr,
+                            )),
+                            ast::Pat::IdentPat(ident) if ident.is_simple_ident() => ident
+                                .name()
+                                .map(|name| name.as_name())
+                                .map(Path::from)
+                                .map(|path| self.alloc_expr_from_pat(Expr::Path(path), ptr)),
+                            ast::Pat::PathPat(p) => p
+                                .path()
+                                .and_then(|path| self.parse_path(path))
+                                .map(|parsed| self.alloc_expr_from_pat(Expr::Path(parsed), ptr)),
+                            // We only need to handle literal, ident (if bare) and path patterns here,
+                            // as any other pattern as a range pattern operand is semantically invalid.
+                            _ => None,
                         }
-                        pat @ (ast::Pat::IdentPat(_) | ast::Pat::PathPat(_)) => {
-                            let subpat = self.collect_pat(pat.clone(), binding_list);
-                            Some(Box::new(LiteralOrConst::Const(subpat)))
-                        }
-                        _ => None,
                     })
                 };
                 let start = range_part_lower(p.start());
@@ -1863,7 +1873,7 @@ impl ExprCollector<'_> {
                             }
                         });
                     if let Some(pat) = pat.left() {
-                        self.source_map.pat_map.insert(src, pat);
+                        self.source_map.pat_map.insert(src, pat.into());
                     }
                     pat
                 }
@@ -2490,7 +2500,7 @@ impl ExprCollector<'_> {
     fn alloc_expr(&mut self, expr: Expr, ptr: ExprPtr) -> ExprId {
         let src = self.expander.in_file(ptr);
         let id = self.store.exprs.alloc(expr);
-        self.source_map.expr_map_back.insert(id, src);
+        self.source_map.expr_map_back.insert(id, src.map(AstPtr::wrap_left));
         self.source_map.expr_map.insert(src, id.into());
         id
     }
@@ -2502,7 +2512,7 @@ impl ExprCollector<'_> {
     fn alloc_expr_desugared_with_ptr(&mut self, expr: Expr, ptr: ExprPtr) -> ExprId {
         let src = self.expander.in_file(ptr);
         let id = self.store.exprs.alloc(expr);
-        self.source_map.expr_map_back.insert(id, src);
+        self.source_map.expr_map_back.insert(id, src.map(AstPtr::wrap_left));
         // We intentionally don't fill this as it could overwrite a non-desugared entry
         // self.source_map.expr_map.insert(src, id);
         id
@@ -2526,11 +2536,20 @@ impl ExprCollector<'_> {
         self.source_map.pat_map_back.insert(id, src.map(AstPtr::wrap_left));
         id
     }
+
+    fn alloc_expr_from_pat(&mut self, expr: Expr, ptr: PatPtr) -> ExprId {
+        let src = self.expander.in_file(ptr);
+        let id = self.store.exprs.alloc(expr);
+        self.source_map.pat_map.insert(src, id.into());
+        self.source_map.expr_map_back.insert(id, src.map(AstPtr::wrap_right));
+        id
+    }
+
     fn alloc_pat(&mut self, pat: Pat, ptr: PatPtr) -> PatId {
         let src = self.expander.in_file(ptr);
         let id = self.store.pats.alloc(pat);
         self.source_map.pat_map_back.insert(id, src.map(AstPtr::wrap_right));
-        self.source_map.pat_map.insert(src, id);
+        self.source_map.pat_map.insert(src, id.into());
         id
     }
     // FIXME: desugared pats don't have ptr, that's wrong and should be fixed somehow.
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs
index 6a0b1e5197905..82ad756dc2c6a 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs
@@ -6,10 +6,7 @@ use itertools::Itertools;
 use span::Edition;
 
 use crate::{
-    hir::{
-        Array, BindingAnnotation, CaptureBy, ClosureKind, Literal, LiteralOrConst, Movability,
-        Statement,
-    },
+    hir::{Array, BindingAnnotation, CaptureBy, ClosureKind, Literal, Movability, Statement},
     pretty::{print_generic_args, print_path, print_type_ref},
 };
 
@@ -656,11 +653,11 @@ impl Printer<'_> {
             }
             Pat::Range { start, end } => {
                 if let Some(start) = start {
-                    self.print_literal_or_const(start);
+                    self.print_expr(*start);
                 }
                 w!(self, "..=");
                 if let Some(end) = end {
-                    self.print_literal_or_const(end);
+                    self.print_expr(*end);
                 }
             }
             Pat::Slice { prefix, slice, suffix } => {
@@ -757,13 +754,6 @@ impl Printer<'_> {
         }
     }
 
-    fn print_literal_or_const(&mut self, literal_or_const: &LiteralOrConst) {
-        match literal_or_const {
-            LiteralOrConst::Literal(l) => self.print_literal(l),
-            LiteralOrConst::Const(c) => self.print_pat(*c),
-        }
-    }
-
     fn print_literal(&mut self, literal: &Literal) {
         match literal {
             Literal::String(it) => w!(self, "{:?}", it),
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests.rs
index 9bf1ddb479380..16bf46d3e3f95 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests.rs
@@ -1,11 +1,10 @@
 mod block;
 
+use crate::{hir::MatchArm, test_db::TestDB, ModuleDefId};
 use expect_test::{expect, Expect};
 use la_arena::RawIdx;
 use test_fixture::WithFixture;
 
-use crate::{test_db::TestDB, ModuleDefId};
-
 use super::*;
 
 fn lower(#[rust_analyzer::rust_fixture] ra_fixture: &str) -> (TestDB, Arc<Body>, DefWithBodyId) {
@@ -460,3 +459,45 @@ async fn foo(a: (), b: i32) -> u32 {
     expect!["fn foo(�: (), �: i32) -> impl ::core::future::Future::<Output = u32> �"]
         .assert_eq(&printed);
 }
+
+#[test]
+fn range_bounds_are_hir_exprs() {
+    let (_, body, _) = lower(
+        r#"
+pub const L: i32 = 6;
+mod x {
+    pub const R: i32 = 100;
+}
+const fn f(x: i32) -> i32 {
+    match x {
+        -1..=5 => x * 10,
+        L..=x::R => x * 100,
+        _ => x,
+    }
+}"#,
+    );
+
+    let mtch_arms = body
+        .exprs
+        .iter()
+        .find_map(|(_, expr)| {
+            if let Expr::Match { arms, .. } = expr {
+                return Some(arms);
+            }
+
+            None
+        })
+        .unwrap();
+
+    let MatchArm { pat, .. } = mtch_arms[1];
+    match body.pats[pat] {
+        Pat::Range { start, end } => {
+            let hir_start = &body.exprs[start.unwrap()];
+            let hir_end = &body.exprs[end.unwrap()];
+
+            assert!(matches!(hir_start, Expr::Path { .. }));
+            assert!(matches!(hir_end, Expr::Path { .. }));
+        }
+        _ => {}
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/hir.rs b/src/tools/rust-analyzer/crates/hir-def/src/hir.rs
index 0dcddf162b2fa..494644d8eff9d 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/hir.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/hir.rs
@@ -55,12 +55,20 @@ impl ExprOrPatId {
         }
     }
 
+    pub fn is_expr(&self) -> bool {
+        matches!(self, Self::ExprId(_))
+    }
+
     pub fn as_pat(self) -> Option<PatId> {
         match self {
             Self::PatId(v) => Some(v),
             _ => None,
         }
     }
+
+    pub fn is_pat(&self) -> bool {
+        matches!(self, Self::PatId(_))
+    }
 }
 stdx::impl_from!(ExprId, PatId for ExprOrPatId);
 
@@ -571,8 +579,8 @@ pub enum Pat {
         ellipsis: bool,
     },
     Range {
-        start: Option<Box<LiteralOrConst>>,
-        end: Option<Box<LiteralOrConst>>,
+        start: Option<ExprId>,
+        end: Option<ExprId>,
     },
     Slice {
         prefix: Box<[PatId]>,
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/import_map.rs b/src/tools/rust-analyzer/crates/hir-def/src/import_map.rs
index 6137bd34d64a0..d43776b8a66ad 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/import_map.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/import_map.rs
@@ -320,7 +320,7 @@ impl SearchMode {
                     };
                     match m {
                         Some((index, _)) => {
-                            name = &name[index + 1..];
+                            name = name[index..].strip_prefix(|_: char| true).unwrap_or_default();
                             true
                         }
                         None => false,
@@ -1039,4 +1039,22 @@ pub mod fmt {
             "#]],
         );
     }
+
+    #[test]
+    fn unicode_fn_name() {
+        let ra_fixture = r#"
+            //- /main.rs crate:main deps:dep
+            //- /dep.rs crate:dep
+            pub fn あい() {}
+        "#;
+
+        check_search(
+            ra_fixture,
+            "main",
+            Query::new("あ".to_owned()).fuzzy(),
+            expect![[r#"
+            dep::あい (f)
+        "#]],
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs b/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs
index 65a39c565611b..0ca1eb9bcfe37 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs
@@ -18,8 +18,8 @@ use crate::{
     db::DefDatabase,
     per_ns::{Item, MacrosItem, PerNs, TypesItem, ValuesItem},
     visibility::{Visibility, VisibilityExplicitness},
-    AdtId, BuiltinType, ConstId, ExternCrateId, FxIndexMap, HasModule, ImplId, LocalModuleId,
-    Lookup, MacroId, ModuleDefId, ModuleId, TraitId, UseId,
+    AdtId, BuiltinType, ConstId, ExternBlockId, ExternCrateId, FxIndexMap, HasModule, ImplId,
+    LocalModuleId, Lookup, MacroId, ModuleDefId, ModuleId, TraitId, UseId,
 };
 
 #[derive(Debug, Default)]
@@ -158,6 +158,8 @@ pub struct ItemScope {
     declarations: Vec<ModuleDefId>,
 
     impls: Vec<ImplId>,
+    #[allow(clippy::box_collection)]
+    extern_blocks: Option<Box<Vec<ExternBlockId>>>,
     unnamed_consts: Vec<ConstId>,
     /// Traits imported via `use Trait as _;`.
     unnamed_trait_imports: FxHashMap<TraitId, Item<()>>,
@@ -319,6 +321,10 @@ impl ItemScope {
         self.extern_crate_decls.iter().copied()
     }
 
+    pub fn extern_blocks(&self) -> impl Iterator<Item = ExternBlockId> + '_ {
+        self.extern_blocks.iter().flat_map(|it| it.iter()).copied()
+    }
+
     pub fn use_decls(&self) -> impl ExactSizeIterator<Item = UseId> + '_ {
         self.use_decls.iter().copied()
     }
@@ -469,6 +475,10 @@ impl ItemScope {
         self.impls.push(imp);
     }
 
+    pub(crate) fn define_extern_block(&mut self, extern_block: ExternBlockId) {
+        self.extern_blocks.get_or_insert_default().push(extern_block);
+    }
+
     pub(crate) fn define_extern_crate_decl(&mut self, extern_crate: ExternCrateId) {
         self.extern_crate_decls.push(extern_crate);
     }
@@ -806,7 +816,11 @@ impl ItemScope {
             use_imports_types,
             use_imports_macros,
             macro_invocations,
+            extern_blocks,
         } = self;
+        if let Some(it) = extern_blocks {
+            it.shrink_to_fit();
+        }
         types.shrink_to_fit();
         values.shrink_to_fit();
         macros.shrink_to_fit();
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
index 70e3e1ed4e9cd..a43c0eb9d70bb 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
@@ -5,7 +5,7 @@
 //! in-memory macros.
 use expect_test::expect;
 
-use crate::macro_expansion_tests::check;
+use crate::macro_expansion_tests::{check, check_errors};
 
 #[test]
 fn attribute_macro_attr_censoring() {
@@ -216,3 +216,21 @@ struct S;
 #[doc = "doc attr"] struct S;"##]],
     );
 }
+
+#[test]
+fn cfg_evaluated_before_attr_macros() {
+    check_errors(
+        r#"
+//- proc_macros: disallow_cfg
+
+use proc_macros::disallow_cfg;
+
+#[disallow_cfg] #[cfg(false)] fn foo() {}
+// True cfg are kept.
+// #[disallow_cfg] #[cfg(true)] fn bar() {}
+#[disallow_cfg] #[cfg_attr(false, inline)] fn baz() {}
+#[disallow_cfg] #[cfg_attr(true, inline)] fn qux() {}
+    "#,
+        expect![[r#""#]],
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs b/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs
index 06276335b7188..254c1379917ba 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/nameres/collector.rs
@@ -1759,16 +1759,20 @@ impl ModCollector<'_, '_> {
                         );
                     }
                 }
-                ModItem::ExternBlock(block) => self.collect(
-                    &self.item_tree[block].children,
-                    ItemContainerId::ExternBlockId(
-                        ExternBlockLoc {
-                            container: module,
-                            id: ItemTreeId::new(self.tree_id, block),
-                        }
-                        .intern(db),
-                    ),
-                ),
+                ModItem::ExternBlock(block) => {
+                    let extern_block_id = ExternBlockLoc {
+                        container: module,
+                        id: ItemTreeId::new(self.tree_id, block),
+                    }
+                    .intern(db);
+                    self.def_collector.def_map.modules[self.module_id]
+                        .scope
+                        .define_extern_block(extern_block_id);
+                    self.collect(
+                        &self.item_tree[block].children,
+                        ItemContainerId::ExternBlockId(extern_block_id),
+                    )
+                }
                 ModItem::MacroCall(mac) => self.collect_macro_call(&self.item_tree[mac], container),
                 ModItem::MacroRules(id) => self.collect_macro_rules(id, module),
                 ModItem::Macro2(id) => self.collect_macro_def(id, module),
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/path.rs b/src/tools/rust-analyzer/crates/hir-def/src/path.rs
index e59c37104dd60..e6c2504d07a5a 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/path.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/path.rs
@@ -173,10 +173,7 @@ impl Path {
                 segments: path.mod_path().segments(),
                 generic_args: Some(path.generic_args()),
             },
-            Path::LangItem(_, seg) => PathSegments {
-                segments: seg.as_ref().map_or(&[], |seg| std::slice::from_ref(seg)),
-                generic_args: None,
-            },
+            Path::LangItem(_, seg) => PathSegments { segments: seg.as_slice(), generic_args: None },
         }
     }
 
@@ -240,6 +237,11 @@ pub struct PathSegment<'a> {
     pub args_and_bindings: Option<&'a GenericArgs>,
 }
 
+impl PathSegment<'_> {
+    pub const MISSING: PathSegment<'static> =
+        PathSegment { name: &Name::missing(), args_and_bindings: None };
+}
+
 #[derive(Debug, Clone, Copy)]
 pub struct PathSegments<'a> {
     segments: &'a [Name],
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs b/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs
index 7e13ae2f7a1be..9dfb6e3cc4b78 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs
@@ -327,8 +327,9 @@ impl Resolver {
                     | LangItemTarget::ImplDef(_)
                     | LangItemTarget::Static(_) => return None,
                 };
+                // Remaining segments start from 0 because lang paths have no segments other than the remaining.
                 return Some((
-                    ResolveValueResult::Partial(type_ns, 1, None),
+                    ResolveValueResult::Partial(type_ns, 0, None),
                     ResolvePathResultPrefixInfo::default(),
                 ));
             }
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/cfg_process.rs b/src/tools/rust-analyzer/crates/hir-expand/src/cfg_process.rs
index 01a3103af82d4..626a82ae08eab 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/cfg_process.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/cfg_process.rs
@@ -201,9 +201,6 @@ pub(crate) fn process_cfg_attrs(
         MacroDefKind::BuiltInAttr(_, expander) => expander.is_derive(),
         _ => false,
     };
-    if !is_derive {
-        return None;
-    }
     let mut remove = FxHashSet::default();
 
     let item = ast::Item::cast(node.clone())?;
@@ -220,28 +217,43 @@ pub(crate) fn process_cfg_attrs(
             }
         }
     }
-    match item {
-        ast::Item::Struct(it) => match it.field_list()? {
-            ast::FieldList::RecordFieldList(fields) => {
-                process_has_attrs_with_possible_comma(db, fields.fields(), loc.krate, &mut remove)?;
+
+    if is_derive {
+        // Only derives get their code cfg-clean, normal attribute macros process only the cfg at their level
+        // (cfg_attr is handled above, cfg is handled in the def map).
+        match item {
+            ast::Item::Struct(it) => match it.field_list()? {
+                ast::FieldList::RecordFieldList(fields) => {
+                    process_has_attrs_with_possible_comma(
+                        db,
+                        fields.fields(),
+                        loc.krate,
+                        &mut remove,
+                    )?;
+                }
+                ast::FieldList::TupleFieldList(fields) => {
+                    process_has_attrs_with_possible_comma(
+                        db,
+                        fields.fields(),
+                        loc.krate,
+                        &mut remove,
+                    )?;
+                }
+            },
+            ast::Item::Enum(it) => {
+                process_enum(db, it.variant_list()?, loc.krate, &mut remove)?;
             }
-            ast::FieldList::TupleFieldList(fields) => {
-                process_has_attrs_with_possible_comma(db, fields.fields(), loc.krate, &mut remove)?;
+            ast::Item::Union(it) => {
+                process_has_attrs_with_possible_comma(
+                    db,
+                    it.record_field_list()?.fields(),
+                    loc.krate,
+                    &mut remove,
+                )?;
             }
-        },
-        ast::Item::Enum(it) => {
-            process_enum(db, it.variant_list()?, loc.krate, &mut remove)?;
-        }
-        ast::Item::Union(it) => {
-            process_has_attrs_with_possible_comma(
-                db,
-                it.record_field_list()?.fields(),
-                loc.krate,
-                &mut remove,
-            )?;
+            // FIXME: Implement for other items if necessary. As we do not support #[cfg_eval] yet, we do not need to implement it for now
+            _ => {}
         }
-        // FIXME: Implement for other items if necessary. As we do not support #[cfg_eval] yet, we do not need to implement it for now
-        _ => {}
     }
     Some(remove)
 }
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/name.rs b/src/tools/rust-analyzer/crates/hir-expand/src/name.rs
index 21e5fb5ef9e1c..0758bd4515ef2 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/name.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/name.rs
@@ -142,8 +142,8 @@ impl Name {
     /// Ideally, we want a `gensym` semantics for missing names -- each missing
     /// name is equal only to itself. It's not clear how to implement this in
     /// salsa though, so we punt on that bit for a moment.
-    pub fn missing() -> Name {
-        Name { symbol: sym::MISSING_NAME.clone(), ctx: () }
+    pub const fn missing() -> Name {
+        Name { symbol: sym::consts::MISSING_NAME, ctx: () }
     }
 
     /// Returns true if this is a fake name for things missing in the source code. See
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/chalk_db.rs b/src/tools/rust-analyzer/crates/hir-ty/src/chalk_db.rs
index c8ff6cba3dd18..6d4753ea3898c 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/chalk_db.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/chalk_db.rs
@@ -768,23 +768,21 @@ pub(crate) fn adt_datum_query(
         phantom_data,
     };
 
-    // this slows down rust-analyzer by quite a bit unfortunately, so enabling this is currently not worth it
-    let _variant_id_to_fields = |id: VariantId| {
+    let variant_id_to_fields = |id: VariantId| {
         let variant_data = &id.variant_data(db.upcast());
-        let fields = if variant_data.fields().is_empty() {
+        let fields = if variant_data.fields().is_empty() || bound_vars_subst.is_empty(Interner) {
             vec![]
         } else {
-            let field_types = db.field_types(id);
-            variant_data
-                .fields()
-                .iter()
-                .map(|(idx, _)| field_types[idx].clone().substitute(Interner, &bound_vars_subst))
-                .filter(|it| !it.contains_unknown())
-                .collect()
+            // HACK: provide full struct type info slows down rust-analyzer by quite a bit unfortunately,
+            // so we trick chalk into thinking that our struct impl Unsize
+            if let Some(ty) = bound_vars_subst.at(Interner, 0).ty(Interner) {
+                vec![ty.clone()]
+            } else {
+                vec![]
+            }
         };
         rust_ir::AdtVariantDatum { fields }
     };
-    let variant_id_to_fields = |_: VariantId| rust_ir::AdtVariantDatum { fields: vec![] };
 
     let (kind, variants) = match adt_id {
         hir_def::AdtId::StructId(id) => {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs
index 0b5f1319243f6..59aaf85164a0c 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs
@@ -440,7 +440,9 @@ impl ExprValidator {
                             return;
                         };
                         let root = source_ptr.file_syntax(db.upcast());
-                        let ast::Expr::IfExpr(if_expr) = source_ptr.value.to_node(&root) else {
+                        let either::Left(ast::Expr::IfExpr(if_expr)) =
+                            source_ptr.value.to_node(&root)
+                        else {
                             return;
                         };
                         let mut top_if_expr = if_expr;
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs
index 617ebba8811e2..0cb7002f4460c 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer.rs
@@ -16,7 +16,7 @@
 pub(crate) mod cast;
 pub(crate) mod closure;
 mod coerce;
-mod diagnostics;
+pub(crate) mod diagnostics;
 mod expr;
 mod mutability;
 mod pat;
@@ -236,7 +236,7 @@ pub enum InferenceDiagnostic {
         name: Name,
         /// Contains the type the field resolves to
         field_with_same_name: Option<Ty>,
-        assoc_func_with_same_name: Option<AssocItemId>,
+        assoc_func_with_same_name: Option<FunctionId>,
     },
     UnresolvedAssocItem {
         id: ExprOrPatId,
@@ -1239,7 +1239,29 @@ impl<'a> InferenceContext<'a> {
     }
 
     fn write_expr_adj(&mut self, expr: ExprId, adjustments: Vec<Adjustment>) {
-        self.result.expr_adjustments.insert(expr, adjustments);
+        if adjustments.is_empty() {
+            return;
+        }
+        match self.result.expr_adjustments.entry(expr) {
+            std::collections::hash_map::Entry::Occupied(mut entry) => {
+                match (&mut entry.get_mut()[..], &adjustments[..]) {
+                    (
+                        [Adjustment { kind: Adjust::NeverToAny, target }],
+                        [.., Adjustment { target: new_target, .. }],
+                    ) => {
+                        // NeverToAny coercion can target any type, so instead of adding a new
+                        // adjustment on top we can change the target.
+                        *target = new_target.clone();
+                    }
+                    _ => {
+                        *entry.get_mut() = adjustments;
+                    }
+                }
+            }
+            std::collections::hash_map::Entry::Vacant(entry) => {
+                entry.insert(adjustments);
+            }
+        }
     }
 
     fn write_method_resolution(&mut self, expr: ExprId, func: FunctionId, subst: Substitution) {
@@ -1480,21 +1502,22 @@ impl<'a> InferenceContext<'a> {
             &self.diagnostics,
             InferenceTyDiagnosticSource::Body,
         );
+        let mut path_ctx = ctx.at_path(path, node);
         let (resolution, unresolved) = if value_ns {
-            let Some(res) = ctx.resolve_path_in_value_ns(path, node, HygieneId::ROOT) else {
+            let Some(res) = path_ctx.resolve_path_in_value_ns(HygieneId::ROOT) else {
                 return (self.err_ty(), None);
             };
             match res {
                 ResolveValueResult::ValueNs(value, _) => match value {
                     ValueNs::EnumVariantId(var) => {
-                        let substs = ctx.substs_from_path(path, var.into(), true);
+                        let substs = path_ctx.substs_from_path(var.into(), true);
                         drop(ctx);
                         let ty = self.db.ty(var.lookup(self.db.upcast()).parent.into());
                         let ty = self.insert_type_vars(ty.substitute(Interner, &substs));
                         return (ty, Some(var.into()));
                     }
                     ValueNs::StructId(strukt) => {
-                        let substs = ctx.substs_from_path(path, strukt.into(), true);
+                        let substs = path_ctx.substs_from_path(strukt.into(), true);
                         drop(ctx);
                         let ty = self.db.ty(strukt.into());
                         let ty = self.insert_type_vars(ty.substitute(Interner, &substs));
@@ -1509,7 +1532,7 @@ impl<'a> InferenceContext<'a> {
                 ResolveValueResult::Partial(typens, unresolved, _) => (typens, Some(unresolved)),
             }
         } else {
-            match ctx.resolve_path_in_type_ns(path, node) {
+            match path_ctx.resolve_path_in_type_ns() {
                 Some((it, idx)) => (it, idx),
                 None => return (self.err_ty(), None),
             }
@@ -1520,21 +1543,21 @@ impl<'a> InferenceContext<'a> {
         };
         return match resolution {
             TypeNs::AdtId(AdtId::StructId(strukt)) => {
-                let substs = ctx.substs_from_path(path, strukt.into(), true);
+                let substs = path_ctx.substs_from_path(strukt.into(), true);
                 drop(ctx);
                 let ty = self.db.ty(strukt.into());
                 let ty = self.insert_type_vars(ty.substitute(Interner, &substs));
                 forbid_unresolved_segments((ty, Some(strukt.into())), unresolved)
             }
             TypeNs::AdtId(AdtId::UnionId(u)) => {
-                let substs = ctx.substs_from_path(path, u.into(), true);
+                let substs = path_ctx.substs_from_path(u.into(), true);
                 drop(ctx);
                 let ty = self.db.ty(u.into());
                 let ty = self.insert_type_vars(ty.substitute(Interner, &substs));
                 forbid_unresolved_segments((ty, Some(u.into())), unresolved)
             }
             TypeNs::EnumVariantId(var) => {
-                let substs = ctx.substs_from_path(path, var.into(), true);
+                let substs = path_ctx.substs_from_path(var.into(), true);
                 drop(ctx);
                 let ty = self.db.ty(var.lookup(self.db.upcast()).parent.into());
                 let ty = self.insert_type_vars(ty.substitute(Interner, &substs));
@@ -1545,31 +1568,32 @@ impl<'a> InferenceContext<'a> {
                 let substs = generics.placeholder_subst(self.db);
                 let mut ty = self.db.impl_self_ty(impl_id).substitute(Interner, &substs);
 
-                let Some(mut remaining_idx) = unresolved else {
+                let Some(remaining_idx) = unresolved else {
                     drop(ctx);
                     return self.resolve_variant_on_alias(ty, None, mod_path);
                 };
 
                 let mut remaining_segments = path.segments().skip(remaining_idx);
 
+                if remaining_segments.len() >= 2 {
+                    path_ctx.ignore_last_segment();
+                }
+
                 // We need to try resolving unresolved segments one by one because each may resolve
                 // to a projection, which `TyLoweringContext` cannot handle on its own.
                 let mut tried_resolving_once = false;
-                while !remaining_segments.is_empty() {
-                    let resolved_segment = path.segments().get(remaining_idx - 1).unwrap();
-                    let current_segment = remaining_segments.take(1);
-
+                while let Some(current_segment) = remaining_segments.first() {
                     // If we can resolve to an enum variant, it takes priority over associated type
                     // of the same name.
                     if let Some((AdtId::EnumId(id), _)) = ty.as_adt() {
                         let enum_data = self.db.enum_data(id);
-                        let name = current_segment.first().unwrap().name;
-                        if let Some(variant) = enum_data.variant(name) {
+                        if let Some(variant) = enum_data.variant(current_segment.name) {
                             return if remaining_segments.len() == 1 {
                                 (ty, Some(variant.into()))
                             } else {
                                 // We still have unresolved paths, but enum variants never have
                                 // associated types!
+                                // FIXME: Report an error.
                                 (self.err_ty(), None)
                             };
                         }
@@ -1578,23 +1602,13 @@ impl<'a> InferenceContext<'a> {
                     if tried_resolving_once {
                         // FIXME: with `inherent_associated_types` this is allowed, but our `lower_partly_resolved_path()`
                         // will need to be updated to err at the correct segment.
-                        //
-                        // We need to stop here because otherwise the segment index passed to `lower_partly_resolved_path()`
-                        // will be incorrect, and that can mess up error reporting.
                         break;
                     }
 
                     // `lower_partly_resolved_path()` returns `None` as type namespace unless
                     // `remaining_segments` is empty, which is never the case here. We don't know
                     // which namespace the new `ty` is in until normalized anyway.
-                    (ty, _) = ctx.lower_partly_resolved_path(
-                        node,
-                        resolution,
-                        resolved_segment,
-                        current_segment,
-                        (remaining_idx - 1) as u32,
-                        false,
-                    );
+                    (ty, _) = path_ctx.lower_partly_resolved_path(resolution, false);
                     tried_resolving_once = true;
 
                     ty = self.table.insert_type_vars(ty);
@@ -1604,8 +1618,6 @@ impl<'a> InferenceContext<'a> {
                         return (self.err_ty(), None);
                     }
 
-                    // FIXME(inherent_associated_types): update `resolution` based on `ty` here.
-                    remaining_idx += 1;
                     remaining_segments = remaining_segments.skip(1);
                 }
                 drop(ctx);
@@ -1621,12 +1633,7 @@ impl<'a> InferenceContext<'a> {
                 (ty, variant)
             }
             TypeNs::TypeAliasId(it) => {
-                let resolved_seg = match unresolved {
-                    None => path.segments().last().unwrap(),
-                    Some(n) => path.segments().get(path.segments().len() - n - 1).unwrap(),
-                };
-                let substs =
-                    ctx.substs_from_path_segment(resolved_seg, Some(it.into()), true, None);
+                let substs = path_ctx.substs_from_path_segment(it.into(), true, None);
                 drop(ctx);
                 let ty = self.db.ty(it.into());
                 let ty = self.insert_type_vars(ty.substitute(Interner, &substs));
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/coerce.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/coerce.rs
index 956d4de07150e..acd86b1f3ed8a 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/coerce.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/coerce.rs
@@ -163,10 +163,27 @@ impl CoerceMany {
         // type is a type variable and the new one is `!`, trying it the other
         // way around first would mean we make the type variable `!`, instead of
         // just marking it as possibly diverging.
-        if let Ok(res) = ctx.coerce(expr, &expr_ty, &self.merged_ty(), CoerceNever::Yes) {
-            self.final_ty = Some(res);
-        } else if let Ok(res) = ctx.coerce(expr, &self.merged_ty(), &expr_ty, CoerceNever::Yes) {
+        //
+        // - [Comment from rustc](https://github.com/rust-lang/rust/blob/5ff18d0eaefd1bd9ab8ec33dab2404a44e7631ed/compiler/rustc_hir_typeck/src/coercion.rs#L1334-L1335)
+        // First try to coerce the new expression to the type of the previous ones,
+        // but only if the new expression has no coercion already applied to it.
+        if expr.is_none_or(|expr| !ctx.result.expr_adjustments.contains_key(&expr)) {
+            if let Ok(res) = ctx.coerce(expr, &expr_ty, &self.merged_ty(), CoerceNever::Yes) {
+                self.final_ty = Some(res);
+                if let Some(expr) = expr {
+                    self.expressions.push(expr);
+                }
+                return;
+            }
+        }
+
+        if let Ok((adjustments, res)) =
+            ctx.coerce_inner(&self.merged_ty(), &expr_ty, CoerceNever::Yes)
+        {
             self.final_ty = Some(res);
+            for &e in &self.expressions {
+                ctx.write_expr_adj(e, adjustments.clone());
+            }
         } else {
             match cause {
                 CoercionCause::Expr(id) => {
@@ -244,14 +261,23 @@ impl InferenceContext<'_> {
         // between places and values.
         coerce_never: CoerceNever,
     ) -> Result<Ty, TypeError> {
-        let from_ty = self.resolve_ty_shallow(from_ty);
-        let to_ty = self.resolve_ty_shallow(to_ty);
-        let (adjustments, ty) = self.table.coerce(&from_ty, &to_ty, coerce_never)?;
+        let (adjustments, ty) = self.coerce_inner(from_ty, to_ty, coerce_never)?;
         if let Some(expr) = expr {
             self.write_expr_adj(expr, adjustments);
         }
         Ok(ty)
     }
+
+    fn coerce_inner(
+        &mut self,
+        from_ty: &Ty,
+        to_ty: &Ty,
+        coerce_never: CoerceNever,
+    ) -> Result<(Vec<Adjustment>, Ty), TypeError> {
+        let from_ty = self.resolve_ty_shallow(from_ty);
+        let to_ty = self.resolve_ty_shallow(to_ty);
+        self.table.coerce(&from_ty, &to_ty, coerce_never)
+    }
 }
 
 impl InferenceTable<'_> {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/diagnostics.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/diagnostics.rs
index b85378531ad65..e4f5b5ed378dc 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/diagnostics.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/diagnostics.rs
@@ -5,16 +5,14 @@
 use std::cell::RefCell;
 use std::ops::{Deref, DerefMut};
 
-use hir_def::expr_store::HygieneId;
-use hir_def::hir::ExprOrPatId;
-use hir_def::path::{Path, PathSegment, PathSegments};
-use hir_def::resolver::{ResolveValueResult, Resolver, TypeNs};
-use hir_def::type_ref::TypesMap;
-use hir_def::TypeOwnerId;
-
-use crate::db::HirDatabase;
+use either::Either;
+use hir_def::{hir::ExprOrPatId, path::Path, resolver::Resolver, type_ref::TypesMap, TypeOwnerId};
+use la_arena::{Idx, RawIdx};
+
 use crate::{
-    InferenceDiagnostic, InferenceTyDiagnosticSource, Ty, TyLoweringContext, TyLoweringDiagnostic,
+    db::HirDatabase,
+    lower::path::{PathDiagnosticCallback, PathLoweringContext},
+    InferenceDiagnostic, InferenceTyDiagnosticSource, TyLoweringContext, TyLoweringDiagnostic,
 };
 
 // Unfortunately, this struct needs to use interior mutability (but we encapsulate it)
@@ -44,6 +42,11 @@ impl Diagnostics {
     }
 }
 
+pub(crate) struct PathDiagnosticCallbackData<'a> {
+    node: ExprOrPatId,
+    diagnostics: &'a Diagnostics,
+}
+
 pub(super) struct InferenceTyLoweringContext<'a> {
     ctx: TyLoweringContext<'a>,
     diagnostics: &'a Diagnostics,
@@ -51,6 +54,7 @@ pub(super) struct InferenceTyLoweringContext<'a> {
 }
 
 impl<'a> InferenceTyLoweringContext<'a> {
+    #[inline]
     pub(super) fn new(
         db: &'a dyn HirDatabase,
         resolver: &'a Resolver,
@@ -62,65 +66,62 @@ impl<'a> InferenceTyLoweringContext<'a> {
         Self { ctx: TyLoweringContext::new(db, resolver, types_map, owner), diagnostics, source }
     }
 
-    pub(super) fn resolve_path_in_type_ns(
-        &mut self,
-        path: &Path,
+    #[inline]
+    pub(super) fn at_path<'b>(
+        &'b mut self,
+        path: &'b Path,
         node: ExprOrPatId,
-    ) -> Option<(TypeNs, Option<usize>)> {
-        let diagnostics = self.diagnostics;
-        self.ctx.resolve_path_in_type_ns(path, &mut |_, diag| {
-            diagnostics.push(InferenceDiagnostic::PathDiagnostic { node, diag })
-        })
+    ) -> PathLoweringContext<'b, 'a> {
+        let on_diagnostic = PathDiagnosticCallback {
+            data: Either::Right(PathDiagnosticCallbackData { diagnostics: self.diagnostics, node }),
+            callback: |data, _, diag| {
+                let data = data.as_ref().right().unwrap();
+                data.diagnostics
+                    .push(InferenceDiagnostic::PathDiagnostic { node: data.node, diag });
+            },
+        };
+        PathLoweringContext::new(&mut self.ctx, on_diagnostic, path)
     }
 
-    pub(super) fn resolve_path_in_value_ns(
-        &mut self,
-        path: &Path,
-        node: ExprOrPatId,
-        hygiene_id: HygieneId,
-    ) -> Option<ResolveValueResult> {
-        let diagnostics = self.diagnostics;
-        self.ctx.resolve_path_in_value_ns(path, hygiene_id, &mut |_, diag| {
-            diagnostics.push(InferenceDiagnostic::PathDiagnostic { node, diag })
-        })
+    #[inline]
+    pub(super) fn at_path_forget_diagnostics<'b>(
+        &'b mut self,
+        path: &'b Path,
+    ) -> PathLoweringContext<'b, 'a> {
+        let on_diagnostic = PathDiagnosticCallback {
+            data: Either::Right(PathDiagnosticCallbackData {
+                diagnostics: self.diagnostics,
+                node: ExprOrPatId::ExprId(Idx::from_raw(RawIdx::from_u32(0))),
+            }),
+            callback: |_data, _, _diag| {},
+        };
+        PathLoweringContext::new(&mut self.ctx, on_diagnostic, path)
     }
 
-    pub(super) fn lower_partly_resolved_path(
-        &mut self,
-        node: ExprOrPatId,
-        resolution: TypeNs,
-        resolved_segment: PathSegment<'_>,
-        remaining_segments: PathSegments<'_>,
-        resolved_segment_idx: u32,
-        infer_args: bool,
-    ) -> (Ty, Option<TypeNs>) {
-        let diagnostics = self.diagnostics;
-        self.ctx.lower_partly_resolved_path(
-            resolution,
-            resolved_segment,
-            remaining_segments,
-            resolved_segment_idx,
-            infer_args,
-            &mut |_, diag| diagnostics.push(InferenceDiagnostic::PathDiagnostic { node, diag }),
-        )
+    #[inline]
+    pub(super) fn forget_diagnostics(&mut self) {
+        self.ctx.diagnostics.clear();
     }
 }
 
 impl<'a> Deref for InferenceTyLoweringContext<'a> {
     type Target = TyLoweringContext<'a>;
 
+    #[inline]
     fn deref(&self) -> &Self::Target {
         &self.ctx
     }
 }
 
 impl DerefMut for InferenceTyLoweringContext<'_> {
+    #[inline]
     fn deref_mut(&mut self) -> &mut Self::Target {
         &mut self.ctx
     }
 }
 
 impl Drop for InferenceTyLoweringContext<'_> {
+    #[inline]
     fn drop(&mut self) {
         self.diagnostics
             .push_ty_diagnostics(self.source, std::mem::take(&mut self.ctx.diagnostics));
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs
index 86e5afdb50923..80e3ca1fa282e 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/expr.rs
@@ -489,78 +489,7 @@ impl InferenceContext<'_> {
 
                 ty
             }
-            Expr::Call { callee, args, .. } => {
-                let callee_ty = self.infer_expr(*callee, &Expectation::none(), ExprIsRead::Yes);
-                let mut derefs = Autoderef::new(&mut self.table, callee_ty.clone(), false, true);
-                let (res, derefed_callee) = loop {
-                    let Some((callee_deref_ty, _)) = derefs.next() else {
-                        break (None, callee_ty.clone());
-                    };
-                    if let Some(res) = derefs.table.callable_sig(&callee_deref_ty, args.len()) {
-                        break (Some(res), callee_deref_ty);
-                    }
-                };
-                // if the function is unresolved, we use is_varargs=true to
-                // suppress the arg count diagnostic here
-                let is_varargs =
-                    derefed_callee.callable_sig(self.db).is_some_and(|sig| sig.is_varargs)
-                        || res.is_none();
-                let (param_tys, ret_ty) = match res {
-                    Some((func, params, ret_ty)) => {
-                        let mut adjustments = auto_deref_adjust_steps(&derefs);
-                        if let TyKind::Closure(c, _) =
-                            self.table.resolve_completely(callee_ty.clone()).kind(Interner)
-                        {
-                            if let Some(par) = self.current_closure {
-                                self.closure_dependencies.entry(par).or_default().push(*c);
-                            }
-                            self.deferred_closures.entry(*c).or_default().push((
-                                derefed_callee.clone(),
-                                callee_ty.clone(),
-                                params.clone(),
-                                tgt_expr,
-                            ));
-                        }
-                        if let Some(fn_x) = func {
-                            self.write_fn_trait_method_resolution(
-                                fn_x,
-                                &derefed_callee,
-                                &mut adjustments,
-                                &callee_ty,
-                                &params,
-                                tgt_expr,
-                            );
-                        }
-                        self.write_expr_adj(*callee, adjustments);
-                        (params, ret_ty)
-                    }
-                    None => {
-                        self.push_diagnostic(InferenceDiagnostic::ExpectedFunction {
-                            call_expr: tgt_expr,
-                            found: callee_ty.clone(),
-                        });
-                        (Vec::new(), self.err_ty())
-                    }
-                };
-                let indices_to_skip = self.check_legacy_const_generics(derefed_callee, args);
-                self.register_obligations_for_call(&callee_ty);
-
-                let expected_inputs = self.expected_inputs_for_expected_output(
-                    expected,
-                    ret_ty.clone(),
-                    param_tys.clone(),
-                );
-
-                self.check_call_arguments(
-                    tgt_expr,
-                    args,
-                    &expected_inputs,
-                    &param_tys,
-                    &indices_to_skip,
-                    is_varargs,
-                );
-                self.normalize_associated_types_in(ret_ty)
-            }
+            Expr::Call { callee, args, .. } => self.infer_call(tgt_expr, *callee, args, expected),
             Expr::MethodCall { receiver, args, method_name, generic_args } => self
                 .infer_method_call(
                     tgt_expr,
@@ -1872,6 +1801,107 @@ impl InferenceContext<'_> {
         }
     }
 
+    fn infer_call(
+        &mut self,
+        tgt_expr: ExprId,
+        callee: ExprId,
+        args: &[ExprId],
+        expected: &Expectation,
+    ) -> Ty {
+        let callee_ty = self.infer_expr(callee, &Expectation::none(), ExprIsRead::Yes);
+        let mut derefs = Autoderef::new(&mut self.table, callee_ty.clone(), false, true);
+        let (res, derefed_callee) = loop {
+            let Some((callee_deref_ty, _)) = derefs.next() else {
+                break (None, callee_ty.clone());
+            };
+            if let Some(res) = derefs.table.callable_sig(&callee_deref_ty, args.len()) {
+                break (Some(res), callee_deref_ty);
+            }
+        };
+        // if the function is unresolved, we use is_varargs=true to
+        // suppress the arg count diagnostic here
+        let is_varargs =
+            derefed_callee.callable_sig(self.db).is_some_and(|sig| sig.is_varargs) || res.is_none();
+        let (param_tys, ret_ty) = match res {
+            Some((func, params, ret_ty)) => {
+                let mut adjustments = auto_deref_adjust_steps(&derefs);
+                if let TyKind::Closure(c, _) =
+                    self.table.resolve_completely(callee_ty.clone()).kind(Interner)
+                {
+                    if let Some(par) = self.current_closure {
+                        self.closure_dependencies.entry(par).or_default().push(*c);
+                    }
+                    self.deferred_closures.entry(*c).or_default().push((
+                        derefed_callee.clone(),
+                        callee_ty.clone(),
+                        params.clone(),
+                        tgt_expr,
+                    ));
+                }
+                if let Some(fn_x) = func {
+                    self.write_fn_trait_method_resolution(
+                        fn_x,
+                        &derefed_callee,
+                        &mut adjustments,
+                        &callee_ty,
+                        &params,
+                        tgt_expr,
+                    );
+                }
+                self.write_expr_adj(callee, adjustments);
+                (params, ret_ty)
+            }
+            None => {
+                self.push_diagnostic(InferenceDiagnostic::ExpectedFunction {
+                    call_expr: tgt_expr,
+                    found: callee_ty.clone(),
+                });
+                (Vec::new(), self.err_ty())
+            }
+        };
+        let indices_to_skip = self.check_legacy_const_generics(derefed_callee, args);
+        self.check_call(
+            tgt_expr,
+            args,
+            callee_ty,
+            &param_tys,
+            ret_ty,
+            &indices_to_skip,
+            is_varargs,
+            expected,
+        )
+    }
+
+    fn check_call(
+        &mut self,
+        tgt_expr: ExprId,
+        args: &[ExprId],
+        callee_ty: Ty,
+        param_tys: &[Ty],
+        ret_ty: Ty,
+        indices_to_skip: &[u32],
+        is_varargs: bool,
+        expected: &Expectation,
+    ) -> Ty {
+        self.register_obligations_for_call(&callee_ty);
+
+        let expected_inputs = self.expected_inputs_for_expected_output(
+            expected,
+            ret_ty.clone(),
+            param_tys.to_owned(),
+        );
+
+        self.check_call_arguments(
+            tgt_expr,
+            args,
+            &expected_inputs,
+            param_tys,
+            indices_to_skip,
+            is_varargs,
+        );
+        self.normalize_associated_types_in(ret_ty)
+    }
+
     fn infer_method_call(
         &mut self,
         tgt_expr: ExprId,
@@ -1892,21 +1922,32 @@ impl InferenceContext<'_> {
             VisibleFromModule::Filter(self.resolver.module()),
             method_name,
         );
-        let (receiver_ty, method_ty, substs) = match resolved {
+        match resolved {
             Some((adjust, func, visible)) => {
-                let (ty, adjustments) = adjust.apply(&mut self.table, receiver_ty);
-                let generics = generics(self.db.upcast(), func.into());
-                let substs = self.substs_for_method_call(generics, generic_args);
-                self.write_expr_adj(receiver, adjustments);
-                self.write_method_resolution(tgt_expr, func, substs.clone());
                 if !visible {
                     self.push_diagnostic(InferenceDiagnostic::PrivateAssocItem {
                         id: tgt_expr.into(),
                         item: func.into(),
                     })
                 }
-                (ty, self.db.value_ty(func.into()).unwrap(), substs)
+
+                let (ty, adjustments) = adjust.apply(&mut self.table, receiver_ty);
+                self.write_expr_adj(receiver, adjustments);
+
+                let generics = generics(self.db.upcast(), func.into());
+                let substs = self.substs_for_method_call(generics, generic_args);
+                self.write_method_resolution(tgt_expr, func, substs.clone());
+                self.check_method_call(
+                    tgt_expr,
+                    args,
+                    self.db.value_ty(func.into()).expect("we have a function def"),
+                    substs,
+                    ty,
+                    expected,
+                )
             }
+            // Failed to resolve, report diagnostic and try to resolve as call to field access or
+            // assoc function
             None => {
                 let field_with_same_name_exists = match self.lookup_field(&receiver_ty, method_name)
                 {
@@ -1926,12 +1967,11 @@ impl InferenceContext<'_> {
                     VisibleFromModule::Filter(self.resolver.module()),
                     Some(method_name),
                     method_resolution::LookupMode::Path,
-                    |_ty, item, visible| {
-                        if visible {
-                            Some(item)
-                        } else {
-                            None
+                    |_ty, item, visible| match item {
+                        hir_def::AssocItemId::FunctionId(function_id) if visible => {
+                            Some(function_id)
                         }
+                        _ => None,
                     },
                 );
 
@@ -1939,17 +1979,45 @@ impl InferenceContext<'_> {
                     expr: tgt_expr,
                     receiver: receiver_ty.clone(),
                     name: method_name.clone(),
-                    field_with_same_name: field_with_same_name_exists,
+                    field_with_same_name: field_with_same_name_exists.clone(),
                     assoc_func_with_same_name,
                 });
-                (
-                    receiver_ty,
-                    Binders::empty(Interner, self.err_ty()),
-                    Substitution::empty(Interner),
-                )
+
+                let recovered = match assoc_func_with_same_name {
+                    Some(f) => {
+                        let generics = generics(self.db.upcast(), f.into());
+                        let substs = self.substs_for_method_call(generics, generic_args);
+                        let f = self
+                            .db
+                            .value_ty(f.into())
+                            .expect("we have a function def")
+                            .substitute(Interner, &substs);
+                        let sig = f.callable_sig(self.db).expect("we have a function def");
+                        Some((f, sig, true))
+                    }
+                    None => field_with_same_name_exists.and_then(|field_ty| {
+                        let callable_sig = field_ty.callable_sig(self.db)?;
+                        Some((field_ty, callable_sig, false))
+                    }),
+                };
+                match recovered {
+                    Some((callee_ty, sig, strip_first)) => self.check_call(
+                        tgt_expr,
+                        args,
+                        callee_ty,
+                        sig.params().get(strip_first as usize..).unwrap_or(&[]),
+                        sig.ret().clone(),
+                        &[],
+                        true,
+                        expected,
+                    ),
+                    None => {
+                        self.check_call_arguments(tgt_expr, args, &[], &[], &[], true);
+                        self.err_ty()
+                    }
+                }
             }
-        };
-        self.check_method_call(tgt_expr, args, method_ty, substs, receiver_ty, expected)
+        }
     }
 
     fn check_method_call(
@@ -2019,9 +2087,10 @@ impl InferenceContext<'_> {
         expected_inputs: &[Ty],
         param_tys: &[Ty],
         skip_indices: &[u32],
-        is_varargs: bool,
+        ignore_arg_param_mismatch: bool,
     ) {
-        let arg_count_mismatch = args.len() != param_tys.len() + skip_indices.len() && !is_varargs;
+        let arg_count_mismatch =
+            !ignore_arg_param_mismatch && args.len() != param_tys.len() + skip_indices.len();
         if arg_count_mismatch {
             self.push_diagnostic(InferenceDiagnostic::MismatchedArgCount {
                 call_expr: expr,
@@ -2050,7 +2119,7 @@ impl InferenceContext<'_> {
                     continue;
                 }
 
-                while skip_indices.peek().is_some_and(|i| *i < idx as u32) {
+                while skip_indices.peek().is_some_and(|&i| i < idx as u32) {
                     skip_indices.next();
                 }
                 if skip_indices.peek().copied() == Some(idx as u32) {
@@ -2132,8 +2201,8 @@ impl InferenceContext<'_> {
             for kind_id in def_generics.iter_self_id().take(self_params) {
                 let arg = args.peek();
                 let arg = match (kind_id, arg) {
-                    // Lifetimes can be elided.
-                    // Once we have implemented lifetime elision correctly,
+                    // Lifetimes can be inferred.
+                    // Once we have implemented lifetime inference correctly,
                     // this should be handled in a proper way.
                     (
                         GenericParamId::LifetimeParamId(_),
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs
index 5ff22bea34dea..db93116f1071a 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs
@@ -564,9 +564,10 @@ impl InferenceContext<'_> {
             | Pat::Range { .. }
             | Pat::Slice { .. } => true,
             Pat::Or(pats) => pats.iter().all(|p| self.is_non_ref_pat(body, *p)),
-            Pat::Path(p) => {
-                let v = self.resolve_value_path_inner(p, pat.into());
-                v.is_some_and(|x| !matches!(x.0, hir_def::resolver::ValueNs::ConstId(_)))
+            Pat::Path(path) => {
+                // A const is a reference pattern, but other value ns things aren't (see #16131).
+                let resolved = self.resolve_value_path_inner(path, pat.into(), true);
+                resolved.is_some_and(|it| !matches!(it.0, hir_def::resolver::ValueNs::ConstId(_)))
             }
             Pat::ConstBlock(..) => false,
             Pat::Lit(expr) => !matches!(
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs
index 36ec60a7a2f69..6254bc12392b0 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/path.rs
@@ -7,7 +7,6 @@ use hir_def::{
     AdtId, AssocItemId, GenericDefId, ItemContainerId, Lookup,
 };
 use hir_expand::name::Name;
-use intern::sym;
 use stdx::never;
 
 use crate::{
@@ -41,7 +40,7 @@ impl InferenceContext<'_> {
     }
 
     fn resolve_value_path(&mut self, path: &Path, id: ExprOrPatId) -> Option<ValuePathResolution> {
-        let (value, self_subst) = self.resolve_value_path_inner(path, id)?;
+        let (value, self_subst) = self.resolve_value_path_inner(path, id, false)?;
 
         let value_def: ValueTyDefId = match value {
             ValueNs::FunctionId(it) => it.into(),
@@ -94,7 +93,14 @@ impl InferenceContext<'_> {
             return Some(ValuePathResolution::NonGeneric(ty));
         };
 
-        let substs = self.with_body_ty_lowering(|ctx| ctx.substs_from_path(path, value_def, true));
+        let substs = self.with_body_ty_lowering(|ctx| {
+            let mut path_ctx = ctx.at_path(path, id);
+            let last_segment = path.segments().len().checked_sub(1);
+            if let Some(last_segment) = last_segment {
+                path_ctx.set_current_segment(last_segment)
+            }
+            path_ctx.substs_from_path(value_def, true)
+        });
         let substs = substs.as_slice(Interner);
 
         if let ValueNs::EnumVariantId(_) = value {
@@ -146,6 +152,7 @@ impl InferenceContext<'_> {
         &mut self,
         path: &Path,
         id: ExprOrPatId,
+        no_diagnostics: bool,
     ) -> Option<(ValueNs, Option<chalk_ir::Substitution<Interner>>)> {
         // Don't use `self.make_ty()` here as we need `orig_ns`.
         let mut ctx = TyLoweringContext::new(
@@ -156,33 +163,83 @@ impl InferenceContext<'_> {
             &self.diagnostics,
             InferenceTyDiagnosticSource::Body,
         );
+        let mut path_ctx = if no_diagnostics {
+            ctx.at_path_forget_diagnostics(path)
+        } else {
+            ctx.at_path(path, id)
+        };
         let (value, self_subst) = if let Some(type_ref) = path.type_anchor() {
             let last = path.segments().last()?;
 
-            let (ty, orig_ns) = ctx.lower_ty_ext(type_ref);
+            let (ty, orig_ns) = path_ctx.ty_ctx().lower_ty_ext(type_ref);
             let ty = self.table.insert_type_vars(ty);
             let ty = self.table.normalize_associated_types_in(ty);
 
-            let remaining_segments_for_ty = path.segments().take(path.segments().len() - 1);
-            let (ty, _) = ctx.lower_ty_relative_path(ty, orig_ns, remaining_segments_for_ty);
-            drop(ctx);
+            path_ctx.ignore_last_segment();
+            let (ty, _) = path_ctx.lower_ty_relative_path(ty, orig_ns);
+            drop_ctx(ctx, no_diagnostics);
             let ty = self.table.insert_type_vars(ty);
             let ty = self.table.normalize_associated_types_in(ty);
             self.resolve_ty_assoc_item(ty, last.name, id).map(|(it, substs)| (it, Some(substs)))?
         } else {
             let hygiene = self.body.expr_or_pat_path_hygiene(id);
             // FIXME: report error, unresolved first path segment
-            let value_or_partial = ctx.resolve_path_in_value_ns(path, id, hygiene)?;
-            drop(ctx);
+            let value_or_partial = path_ctx.resolve_path_in_value_ns(hygiene)?;
 
             match value_or_partial {
-                ResolveValueResult::ValueNs(it, _) => (it, None),
-                ResolveValueResult::Partial(def, remaining_index, _) => self
-                    .resolve_assoc_item(id, def, path, remaining_index, id)
-                    .map(|(it, substs)| (it, Some(substs)))?,
+                ResolveValueResult::ValueNs(it, _) => {
+                    drop_ctx(ctx, no_diagnostics);
+                    (it, None)
+                }
+                ResolveValueResult::Partial(def, remaining_index, _) => {
+                    // there may be more intermediate segments between the resolved one and
+                    // the end. Only the last segment needs to be resolved to a value; from
+                    // the segments before that, we need to get either a type or a trait ref.
+
+                    let remaining_segments = path.segments().skip(remaining_index);
+                    let is_before_last = remaining_segments.len() == 1;
+                    let last_segment = remaining_segments
+                        .last()
+                        .expect("there should be at least one segment here");
+
+                    let (resolution, substs) = match (def, is_before_last) {
+                        (TypeNs::TraitId(trait_), true) => {
+                            let self_ty = self.table.new_type_var();
+                            let trait_ref =
+                                path_ctx.lower_trait_ref_from_resolved_path(trait_, self_ty);
+                            drop_ctx(ctx, no_diagnostics);
+                            self.resolve_trait_assoc_item(trait_ref, last_segment, id)
+                        }
+                        (def, _) => {
+                            // Either we already have a type (e.g. `Vec::new`), or we have a
+                            // trait but it's not the last segment, so the next segment
+                            // should resolve to an associated type of that trait (e.g. `<T
+                            // as Iterator>::Item::default`)
+                            path_ctx.ignore_last_segment();
+                            let (ty, _) = path_ctx.lower_partly_resolved_path(def, true);
+                            drop_ctx(ctx, no_diagnostics);
+                            if ty.is_unknown() {
+                                return None;
+                            }
+
+                            let ty = self.insert_type_vars(ty);
+                            let ty = self.normalize_associated_types_in(ty);
+
+                            self.resolve_ty_assoc_item(ty, last_segment.name, id)
+                        }
+                    }?;
+                    (resolution, Some(substs))
+                }
             }
         };
-        Some((value, self_subst))
+        return Some((value, self_subst));
+
+        #[inline]
+        fn drop_ctx(mut ctx: TyLoweringContext<'_>, no_diagnostics: bool) {
+            if no_diagnostics {
+                ctx.forget_diagnostics();
+            }
+        }
     }
 
     fn add_required_obligations_for_value_path(&mut self, def: GenericDefId, subst: &Substitution) {
@@ -212,89 +269,6 @@ impl InferenceContext<'_> {
         }
     }
 
-    fn resolve_assoc_item(
-        &mut self,
-        node: ExprOrPatId,
-        def: TypeNs,
-        path: &Path,
-        remaining_index: usize,
-        id: ExprOrPatId,
-    ) -> Option<(ValueNs, Substitution)> {
-        // there may be more intermediate segments between the resolved one and
-        // the end. Only the last segment needs to be resolved to a value; from
-        // the segments before that, we need to get either a type or a trait ref.
-
-        let _d;
-        let (resolved_segment, remaining_segments) = match path {
-            Path::Normal { .. } | Path::BarePath(_) => {
-                assert!(remaining_index < path.segments().len());
-                (
-                    path.segments().get(remaining_index - 1).unwrap(),
-                    path.segments().skip(remaining_index),
-                )
-            }
-            Path::LangItem(..) => (
-                PathSegment {
-                    name: {
-                        _d = Name::new_symbol_root(sym::Unknown.clone());
-                        &_d
-                    },
-                    args_and_bindings: None,
-                },
-                path.segments(),
-            ),
-        };
-        let is_before_last = remaining_segments.len() == 1;
-
-        match (def, is_before_last) {
-            (TypeNs::TraitId(trait_), true) => {
-                let segment =
-                    remaining_segments.last().expect("there should be at least one segment here");
-                let self_ty = self.table.new_type_var();
-                let trait_ref = self.with_body_ty_lowering(|ctx| {
-                    ctx.lower_trait_ref_from_resolved_path(trait_, resolved_segment, self_ty)
-                });
-                self.resolve_trait_assoc_item(trait_ref, segment, id)
-            }
-            (def, _) => {
-                // Either we already have a type (e.g. `Vec::new`), or we have a
-                // trait but it's not the last segment, so the next segment
-                // should resolve to an associated type of that trait (e.g. `<T
-                // as Iterator>::Item::default`)
-                let remaining_segments_for_ty =
-                    remaining_segments.take(remaining_segments.len() - 1);
-                let mut ctx = TyLoweringContext::new(
-                    self.db,
-                    &self.resolver,
-                    &self.body.types,
-                    self.owner.into(),
-                    &self.diagnostics,
-                    InferenceTyDiagnosticSource::Body,
-                );
-                let (ty, _) = ctx.lower_partly_resolved_path(
-                    node,
-                    def,
-                    resolved_segment,
-                    remaining_segments_for_ty,
-                    (remaining_index - 1) as u32,
-                    true,
-                );
-                drop(ctx);
-                if ty.is_unknown() {
-                    return None;
-                }
-
-                let ty = self.insert_type_vars(ty);
-                let ty = self.normalize_associated_types_in(ty);
-
-                let segment =
-                    remaining_segments.last().expect("there should be at least one segment here");
-
-                self.resolve_ty_assoc_item(ty, segment.name, id)
-            }
-        }
-    }
-
     fn resolve_trait_assoc_item(
         &mut self,
         trait_ref: TraitRef,
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs b/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs
index db13e1fd35437..af73b5ed9a7b4 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/lower.rs
@@ -6,6 +6,7 @@
 //!
 //! This usually involves resolving names, collecting generic arguments etc.
 pub(crate) mod diagnostics;
+pub(crate) mod path;
 
 use std::{
     cell::OnceCell,
@@ -26,29 +27,26 @@ use hir_def::{
     builtin_type::BuiltinType,
     data::{adt::StructKind, TraitFlags},
     expander::Expander,
-    expr_store::HygieneId,
     generics::{
         GenericParamDataRef, TypeOrConstParamData, TypeParamProvenance, WherePredicate,
         WherePredicateTypeTarget,
     },
     lang_item::LangItem,
     nameres::MacroSubNs,
-    path::{GenericArg, GenericArgs, ModPath, Path, PathKind, PathSegment, PathSegments},
-    resolver::{HasResolver, LifetimeNs, ResolveValueResult, Resolver, TypeNs, ValueNs},
+    path::{GenericArg, ModPath, Path, PathKind},
+    resolver::{HasResolver, LifetimeNs, Resolver, TypeNs},
     type_ref::{
         ConstRef, LifetimeRef, PathId, TraitBoundModifier, TraitRef as HirTraitRef, TypeBound,
         TypeRef, TypeRefId, TypesMap, TypesSourceMap,
     },
     AdtId, AssocItemId, CallableDefId, ConstId, ConstParamId, DefWithBodyId, EnumId, EnumVariantId,
-    FunctionId, GenericDefId, GenericParamId, HasModule, ImplId, InTypeConstLoc, ItemContainerId,
-    LocalFieldId, Lookup, StaticId, StructId, TraitId, TypeAliasId, TypeOrConstParamId,
-    TypeOwnerId, UnionId, VariantId,
+    FunctionId, GenericDefId, GenericParamId, HasModule, ImplId, InTypeConstLoc, LocalFieldId,
+    Lookup, StaticId, StructId, TypeAliasId, TypeOrConstParamId, TypeOwnerId, UnionId, VariantId,
 };
 use hir_expand::{name::Name, ExpandResult};
 use la_arena::{Arena, ArenaMap};
 use rustc_hash::FxHashSet;
 use rustc_pattern_analysis::Captures;
-use smallvec::SmallVec;
 use stdx::{impl_from, never};
 use syntax::ast;
 use triomphe::{Arc, ThinArc};
@@ -62,18 +60,19 @@ use crate::{
     db::HirDatabase,
     error_lifetime,
     generics::{generics, trait_self_param_idx, Generics},
-    lower::diagnostics::*,
+    lower::{
+        diagnostics::*,
+        path::{PathDiagnosticCallback, PathLoweringContext},
+    },
     make_binders,
     mapping::{from_chalk_trait_id, lt_to_placeholder_idx, ToChalk},
-    static_lifetime, to_assoc_type_id, to_chalk_trait_id, to_placeholder_idx,
-    utils::{
-        all_super_trait_refs, associated_type_by_name_including_super_traits, InTypeConstIdMetadata,
-    },
-    AliasEq, AliasTy, Binders, BoundVar, CallableSig, Const, ConstScalar, DebruijnIndex, DynTy,
-    FnAbi, FnPointer, FnSig, FnSubst, ImplTrait, ImplTraitId, ImplTraits, Interner, Lifetime,
-    LifetimeData, LifetimeOutlives, ParamKind, PolyFnSig, ProgramClause, ProjectionTy,
-    QuantifiedWhereClause, QuantifiedWhereClauses, Substitution, TraitEnvironment, TraitRef,
-    TraitRefExt, Ty, TyBuilder, TyKind, WhereClause,
+    static_lifetime, to_chalk_trait_id, to_placeholder_idx,
+    utils::{all_super_trait_refs, InTypeConstIdMetadata},
+    AliasTy, Binders, BoundVar, CallableSig, Const, ConstScalar, DebruijnIndex, DynTy, FnAbi,
+    FnPointer, FnSig, FnSubst, ImplTrait, ImplTraitId, ImplTraits, Interner, Lifetime,
+    LifetimeData, LifetimeOutlives, ParamKind, PolyFnSig, ProgramClause, QuantifiedWhereClause,
+    QuantifiedWhereClauses, Substitution, TraitEnvironment, TraitRef, TraitRefExt, Ty, TyBuilder,
+    TyKind, WhereClause,
 };
 
 #[derive(Debug, Default)]
@@ -106,6 +105,8 @@ impl ImplTraitLoweringState {
     }
 }
 
+pub(crate) struct PathDiagnosticCallbackData(TypeRefId);
+
 #[derive(Debug)]
 pub struct TyLoweringContext<'a> {
     pub db: &'a dyn HirDatabase,
@@ -527,9 +528,8 @@ impl<'a> TyLoweringContext<'a> {
         if path.segments().len() > 1 {
             return None;
         }
-        let resolution = match self
-            .resolve_path_in_type_ns(path, &mut Self::on_path_diagnostic_callback(type_ref_id))
-        {
+        let mut ctx = self.at_path(PathId::from_type_ref_unchecked(type_ref_id));
+        let resolution = match ctx.resolve_path_in_type_ns() {
             Some((it, None)) => it,
             _ => return None,
         };
@@ -539,409 +539,36 @@ impl<'a> TyLoweringContext<'a> {
         }
     }
 
-    pub(crate) fn lower_ty_relative_path(
-        &mut self,
-        ty: Ty,
-        // We need the original resolution to lower `Self::AssocTy` correctly
-        res: Option<TypeNs>,
-        remaining_segments: PathSegments<'_>,
-    ) -> (Ty, Option<TypeNs>) {
-        match remaining_segments.len() {
-            0 => (ty, res),
-            1 => {
-                // resolve unselected assoc types
-                let segment = remaining_segments.first().unwrap();
-                (self.select_associated_type(res, segment), None)
-            }
-            _ => {
-                // FIXME report error (ambiguous associated type)
-                (TyKind::Error.intern(Interner), None)
-            }
-        }
-    }
-
-    pub(crate) fn lower_partly_resolved_path(
-        &mut self,
-        resolution: TypeNs,
-        resolved_segment: PathSegment<'_>,
-        remaining_segments: PathSegments<'_>,
-        _resolved_segment_idx: u32,
-        infer_args: bool,
-        _on_diagnostic: &mut dyn FnMut(&mut Self, PathLoweringDiagnostic),
-    ) -> (Ty, Option<TypeNs>) {
-        let ty = match resolution {
-            TypeNs::TraitId(trait_) => {
-                let ty = match remaining_segments.len() {
-                    1 => {
-                        let trait_ref = self.lower_trait_ref_from_resolved_path(
-                            trait_,
-                            resolved_segment,
-                            TyKind::Error.intern(Interner),
-                        );
-                        let segment = remaining_segments.first().unwrap();
-                        let found = self
-                            .db
-                            .trait_data(trait_ref.hir_trait_id())
-                            .associated_type_by_name(segment.name);
-
-                        match found {
-                            Some(associated_ty) => {
-                                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
-                                // generic params. It's inefficient to splice the `Substitution`s, so we may want
-                                // that method to optionally take parent `Substitution` as we already know them at
-                                // this point (`trait_ref.substitution`).
-                                let substitution = self.substs_from_path_segment(
-                                    segment,
-                                    Some(associated_ty.into()),
-                                    false,
-                                    None,
-                                );
-                                let len_self =
-                                    generics(self.db.upcast(), associated_ty.into()).len_self();
-                                let substitution = Substitution::from_iter(
-                                    Interner,
-                                    substitution
-                                        .iter(Interner)
-                                        .take(len_self)
-                                        .chain(trait_ref.substitution.iter(Interner)),
-                                );
-                                TyKind::Alias(AliasTy::Projection(ProjectionTy {
-                                    associated_ty_id: to_assoc_type_id(associated_ty),
-                                    substitution,
-                                }))
-                                .intern(Interner)
-                            }
-                            None => {
-                                // FIXME: report error (associated type not found)
-                                TyKind::Error.intern(Interner)
-                            }
-                        }
-                    }
-                    0 => {
-                        // Trait object type without dyn; this should be handled in upstream. See
-                        // `lower_path()`.
-                        stdx::never!("unexpected fully resolved trait path");
-                        TyKind::Error.intern(Interner)
-                    }
-                    _ => {
-                        // FIXME report error (ambiguous associated type)
-                        TyKind::Error.intern(Interner)
-                    }
-                };
-                return (ty, None);
-            }
-            TypeNs::TraitAliasId(_) => {
-                // FIXME(trait_alias): Implement trait alias.
-                return (TyKind::Error.intern(Interner), None);
-            }
-            TypeNs::GenericParam(param_id) => match self.type_param_mode {
-                ParamLoweringMode::Placeholder => {
-                    TyKind::Placeholder(to_placeholder_idx(self.db, param_id.into()))
-                }
-                ParamLoweringMode::Variable => {
-                    let idx = match self
-                        .generics()
-                        .expect("generics in scope")
-                        .type_or_const_param_idx(param_id.into())
-                    {
-                        None => {
-                            never!("no matching generics");
-                            return (TyKind::Error.intern(Interner), None);
-                        }
-                        Some(idx) => idx,
-                    };
-
-                    TyKind::BoundVar(BoundVar::new(self.in_binders, idx))
-                }
-            }
-            .intern(Interner),
-            TypeNs::SelfType(impl_id) => {
-                let generics = self.generics().expect("impl should have generic param scope");
-
-                match self.type_param_mode {
-                    ParamLoweringMode::Placeholder => {
-                        // `def` can be either impl itself or item within, and we need impl itself
-                        // now.
-                        let generics = generics.parent_or_self();
-                        let subst = generics.placeholder_subst(self.db);
-                        self.db.impl_self_ty(impl_id).substitute(Interner, &subst)
-                    }
-                    ParamLoweringMode::Variable => {
-                        let starting_from = match generics.def() {
-                            GenericDefId::ImplId(_) => 0,
-                            // `def` is an item within impl. We need to substitute `BoundVar`s but
-                            // remember that they are for parent (i.e. impl) generic params so they
-                            // come after our own params.
-                            _ => generics.len_self(),
-                        };
-                        TyBuilder::impl_self_ty(self.db, impl_id)
-                            .fill_with_bound_vars(self.in_binders, starting_from)
-                            .build()
-                    }
-                }
-            }
-            TypeNs::AdtSelfType(adt) => {
-                let generics = generics(self.db.upcast(), adt.into());
-                let substs = match self.type_param_mode {
-                    ParamLoweringMode::Placeholder => generics.placeholder_subst(self.db),
-                    ParamLoweringMode::Variable => {
-                        generics.bound_vars_subst(self.db, self.in_binders)
-                    }
-                };
-                self.db.ty(adt.into()).substitute(Interner, &substs)
-            }
-
-            TypeNs::AdtId(it) => self.lower_path_inner(resolved_segment, it.into(), infer_args),
-            TypeNs::BuiltinType(it) => {
-                self.lower_path_inner(resolved_segment, it.into(), infer_args)
-            }
-            TypeNs::TypeAliasId(it) => {
-                self.lower_path_inner(resolved_segment, it.into(), infer_args)
-            }
-            // FIXME: report error
-            TypeNs::EnumVariantId(_) => return (TyKind::Error.intern(Interner), None),
-        };
-        self.lower_ty_relative_path(ty, Some(resolution), remaining_segments)
-    }
-
-    fn handle_type_ns_resolution(
-        &mut self,
-        resolution: &TypeNs,
-        resolved_segment: PathSegment<'_>,
-        resolved_segment_idx: usize,
-        on_diagnostic: &mut dyn FnMut(&mut Self, PathLoweringDiagnostic),
-    ) {
-        let mut prohibit_generics_on_resolved = |reason| {
-            if resolved_segment.args_and_bindings.is_some() {
-                on_diagnostic(
-                    self,
-                    PathLoweringDiagnostic::GenericArgsProhibited {
-                        segment: resolved_segment_idx as u32,
-                        reason,
-                    },
-                );
-            }
-        };
-
-        match resolution {
-            TypeNs::SelfType(_) => {
-                prohibit_generics_on_resolved(GenericArgsProhibitedReason::SelfTy)
-            }
-            TypeNs::GenericParam(_) => {
-                prohibit_generics_on_resolved(GenericArgsProhibitedReason::TyParam)
-            }
-            TypeNs::AdtSelfType(_) => {
-                prohibit_generics_on_resolved(GenericArgsProhibitedReason::SelfTy)
-            }
-            TypeNs::BuiltinType(_) => {
-                prohibit_generics_on_resolved(GenericArgsProhibitedReason::PrimitiveTy)
-            }
-            TypeNs::AdtId(_)
-            | TypeNs::EnumVariantId(_)
-            | TypeNs::TypeAliasId(_)
-            | TypeNs::TraitId(_)
-            | TypeNs::TraitAliasId(_) => {}
-        }
-    }
-
-    pub(crate) fn resolve_path_in_type_ns_fully(
-        &mut self,
-        path: &Path,
-        on_diagnostic: &mut dyn FnMut(&mut Self, PathLoweringDiagnostic),
-    ) -> Option<TypeNs> {
-        let (res, unresolved) = self.resolve_path_in_type_ns(path, on_diagnostic)?;
-        if unresolved.is_some() {
-            return None;
-        }
-        Some(res)
-    }
-
-    pub(crate) fn resolve_path_in_type_ns(
-        &mut self,
-        path: &Path,
-        on_diagnostic: &mut dyn FnMut(&mut Self, PathLoweringDiagnostic),
-    ) -> Option<(TypeNs, Option<usize>)> {
-        let (resolution, remaining_index, _, prefix_info) =
-            self.resolver.resolve_path_in_type_ns_with_prefix_info(self.db.upcast(), path)?;
-        let segments = path.segments();
-
-        match path {
-            // `segments.is_empty()` can occur with `self`.
-            Path::Normal(..) if !segments.is_empty() => (),
-            _ => return Some((resolution, remaining_index)),
-        };
-
-        let (module_segments, resolved_segment_idx, enum_segment) = match remaining_index {
-            None if prefix_info.enum_variant => {
-                (segments.strip_last_two(), segments.len() - 1, Some(segments.len() - 2))
-            }
-            None => (segments.strip_last(), segments.len() - 1, None),
-            Some(i) => (segments.take(i - 1), i - 1, None),
-        };
-
-        for (i, mod_segment) in module_segments.iter().enumerate() {
-            if mod_segment.args_and_bindings.is_some() {
-                on_diagnostic(
-                    self,
-                    PathLoweringDiagnostic::GenericArgsProhibited {
-                        segment: i as u32,
-                        reason: GenericArgsProhibitedReason::Module,
-                    },
-                );
-            }
-        }
-
-        if let Some(enum_segment) = enum_segment {
-            if segments.get(enum_segment).is_some_and(|it| it.args_and_bindings.is_some())
-                && segments.get(enum_segment + 1).is_some_and(|it| it.args_and_bindings.is_some())
-            {
-                on_diagnostic(
-                    self,
-                    PathLoweringDiagnostic::GenericArgsProhibited {
-                        segment: (enum_segment + 1) as u32,
-                        reason: GenericArgsProhibitedReason::EnumVariant,
-                    },
-                );
-            }
-        }
-
-        self.handle_type_ns_resolution(
-            &resolution,
-            segments.get(resolved_segment_idx).expect("should have resolved segment"),
-            resolved_segment_idx,
-            on_diagnostic,
-        );
-
-        Some((resolution, remaining_index))
-    }
-
-    pub(crate) fn resolve_path_in_value_ns(
-        &mut self,
-        path: &Path,
-        hygiene_id: HygieneId,
-        on_diagnostic: &mut dyn FnMut(&mut Self, PathLoweringDiagnostic),
-    ) -> Option<ResolveValueResult> {
-        let (res, prefix_info) = self.resolver.resolve_path_in_value_ns_with_prefix_info(
-            self.db.upcast(),
-            path,
-            hygiene_id,
-        )?;
-
-        let segments = path.segments();
-        match path {
-            // `segments.is_empty()` can occur with `self`.
-            Path::Normal(..) if !segments.is_empty() => (),
-            _ => return Some(res),
-        };
-
-        let (mod_segments, enum_segment) = match res {
-            ResolveValueResult::Partial(_, unresolved_segment, _) => {
-                (segments.take(unresolved_segment - 1), None)
-            }
-            ResolveValueResult::ValueNs(ValueNs::EnumVariantId(_), _)
-                if prefix_info.enum_variant =>
-            {
-                (segments.strip_last_two(), segments.len().checked_sub(2))
-            }
-            ResolveValueResult::ValueNs(..) => (segments.strip_last(), None),
-        };
-        for (i, mod_segment) in mod_segments.iter().enumerate() {
-            if mod_segment.args_and_bindings.is_some() {
-                on_diagnostic(
-                    self,
-                    PathLoweringDiagnostic::GenericArgsProhibited {
-                        segment: i as u32,
-                        reason: GenericArgsProhibitedReason::Module,
-                    },
-                );
-            }
-        }
-
-        if let Some(enum_segment) = enum_segment {
-            if segments.get(enum_segment).is_some_and(|it| it.args_and_bindings.is_some())
-                && segments.get(enum_segment + 1).is_some_and(|it| it.args_and_bindings.is_some())
-            {
-                on_diagnostic(
-                    self,
-                    PathLoweringDiagnostic::GenericArgsProhibited {
-                        segment: (enum_segment + 1) as u32,
-                        reason: GenericArgsProhibitedReason::EnumVariant,
-                    },
-                );
-            }
+    #[inline]
+    fn on_path_diagnostic_callback(type_ref: TypeRefId) -> PathDiagnosticCallback<'static> {
+        PathDiagnosticCallback {
+            data: Either::Left(PathDiagnosticCallbackData(type_ref)),
+            callback: |data, this, diag| {
+                let type_ref = data.as_ref().left().unwrap().0;
+                this.push_diagnostic(type_ref, TyLoweringDiagnosticKind::PathDiagnostic(diag))
+            },
         }
-
-        match &res {
-            ResolveValueResult::ValueNs(resolution, _) => {
-                let resolved_segment_idx =
-                    segments.len().checked_sub(1).unwrap_or_else(|| panic!("{path:?}"));
-                let resolved_segment = segments.last().unwrap();
-
-                let mut prohibit_generics_on_resolved = |reason| {
-                    if resolved_segment.args_and_bindings.is_some() {
-                        on_diagnostic(
-                            self,
-                            PathLoweringDiagnostic::GenericArgsProhibited {
-                                segment: resolved_segment_idx as u32,
-                                reason,
-                            },
-                        );
-                    }
-                };
-
-                match resolution {
-                    ValueNs::ImplSelf(_) => {
-                        prohibit_generics_on_resolved(GenericArgsProhibitedReason::SelfTy)
-                    }
-                    // FIXME: rustc generates E0107 (incorrect number of generic arguments) and not
-                    // E0109 (generic arguments provided for a type that doesn't accept them) for
-                    // consts and statics, presumably as a defense against future in which consts
-                    // and statics can be generic, or just because it was easier for rustc implementors.
-                    // That means we'll show the wrong error code. Because of us it's easier to do it
-                    // this way :)
-                    ValueNs::GenericParam(_) | ValueNs::ConstId(_) => {
-                        prohibit_generics_on_resolved(GenericArgsProhibitedReason::Const)
-                    }
-                    ValueNs::StaticId(_) => {
-                        prohibit_generics_on_resolved(GenericArgsProhibitedReason::Static)
-                    }
-                    ValueNs::FunctionId(_) | ValueNs::StructId(_) | ValueNs::EnumVariantId(_) => {}
-                    ValueNs::LocalBinding(_) => {}
-                }
-            }
-            ResolveValueResult::Partial(resolution, unresolved_idx, _) => {
-                let resolved_segment_idx = unresolved_idx - 1;
-                let resolved_segment = segments.get(resolved_segment_idx).unwrap();
-                self.handle_type_ns_resolution(
-                    resolution,
-                    resolved_segment,
-                    resolved_segment_idx,
-                    on_diagnostic,
-                );
-            }
-        };
-        Some(res)
     }
 
-    fn on_path_diagnostic_callback(
-        type_ref: TypeRefId,
-    ) -> impl FnMut(&mut Self, PathLoweringDiagnostic) {
-        move |this, diag| {
-            this.push_diagnostic(type_ref, TyLoweringDiagnosticKind::PathDiagnostic(diag))
-        }
+    #[inline]
+    fn at_path(&mut self, path_id: PathId) -> PathLoweringContext<'_, 'a> {
+        PathLoweringContext::new(
+            self,
+            Self::on_path_diagnostic_callback(path_id.type_ref()),
+            &self.types_map[path_id],
+        )
     }
 
     pub(crate) fn lower_path(&mut self, path: &Path, path_id: PathId) -> (Ty, Option<TypeNs>) {
         // Resolve the path (in type namespace)
         if let Some(type_ref) = path.type_anchor() {
             let (ty, res) = self.lower_ty_ext(type_ref);
-            return self.lower_ty_relative_path(ty, res, path.segments());
+            let mut ctx = self.at_path(path_id);
+            return ctx.lower_ty_relative_path(ty, res);
         }
 
-        let (resolution, remaining_index) = match self.resolve_path_in_type_ns(
-            path,
-            &mut Self::on_path_diagnostic_callback(path_id.type_ref()),
-        ) {
+        let mut ctx = self.at_path(path_id);
+        let (resolution, remaining_index) = match ctx.resolve_path_in_type_ns() {
             Some(it) => it,
             None => return (TyKind::Error.intern(Interner), None),
         };
@@ -953,354 +580,21 @@ impl<'a> TyLoweringContext<'a> {
             return (ty, None);
         }
 
-        let (resolved_segment_idx, resolved_segment, remaining_segments) = match remaining_index {
-            None => (
-                path.segments().len() - 1,
-                path.segments().last().expect("resolved path has at least one element"),
-                PathSegments::EMPTY,
-            ),
-            Some(i) => (i - 1, path.segments().get(i - 1).unwrap(), path.segments().skip(i)),
-        };
-
-        self.lower_partly_resolved_path(
-            resolution,
-            resolved_segment,
-            remaining_segments,
-            resolved_segment_idx as u32,
-            false,
-            &mut Self::on_path_diagnostic_callback(path_id.type_ref()),
-        )
-    }
-
-    fn select_associated_type(&mut self, res: Option<TypeNs>, segment: PathSegment<'_>) -> Ty {
-        let Some((generics, res)) = self.generics().zip(res) else {
-            return TyKind::Error.intern(Interner);
-        };
-        let ty = named_associated_type_shorthand_candidates(
-            self.db,
-            generics.def(),
-            res,
-            Some(segment.name.clone()),
-            move |name, t, associated_ty| {
-                let generics = self.generics().unwrap();
-
-                if name != segment.name {
-                    return None;
-                }
-
-                let parent_subst = t.substitution.clone();
-                let parent_subst = match self.type_param_mode {
-                    ParamLoweringMode::Placeholder => {
-                        // if we're lowering to placeholders, we have to put them in now.
-                        let s = generics.placeholder_subst(self.db);
-                        s.apply(parent_subst, Interner)
-                    }
-                    ParamLoweringMode::Variable => {
-                        // We need to shift in the bound vars, since
-                        // `named_associated_type_shorthand_candidates` does not do that.
-                        parent_subst.shifted_in_from(Interner, self.in_binders)
-                    }
-                };
-
-                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
-                // generic params. It's inefficient to splice the `Substitution`s, so we may want
-                // that method to optionally take parent `Substitution` as we already know them at
-                // this point (`t.substitution`).
-                let substs =
-                    self.substs_from_path_segment(segment, Some(associated_ty.into()), false, None);
-
-                let len_self =
-                    crate::generics::generics(self.db.upcast(), associated_ty.into()).len_self();
-
-                let substs = Substitution::from_iter(
-                    Interner,
-                    substs.iter(Interner).take(len_self).chain(parent_subst.iter(Interner)),
-                );
-
-                Some(
-                    TyKind::Alias(AliasTy::Projection(ProjectionTy {
-                        associated_ty_id: to_assoc_type_id(associated_ty),
-                        substitution: substs,
-                    }))
-                    .intern(Interner),
-                )
-            },
-        );
-
-        ty.unwrap_or_else(|| TyKind::Error.intern(Interner))
-    }
-
-    fn lower_path_inner(
-        &mut self,
-        segment: PathSegment<'_>,
-        typeable: TyDefId,
-        infer_args: bool,
-    ) -> Ty {
-        let generic_def = match typeable {
-            TyDefId::BuiltinType(_) => None,
-            TyDefId::AdtId(it) => Some(it.into()),
-            TyDefId::TypeAliasId(it) => Some(it.into()),
-        };
-        let substs = self.substs_from_path_segment(segment, generic_def, infer_args, None);
-        self.db.ty(typeable).substitute(Interner, &substs)
-    }
-
-    /// Collect generic arguments from a path into a `Substs`. See also
-    /// `create_substs_for_ast_path` and `def_to_ty` in rustc.
-    pub(super) fn substs_from_path(
-        &mut self,
-        path: &Path,
-        // Note that we don't call `db.value_type(resolved)` here,
-        // `ValueTyDefId` is just a convenient way to pass generics and
-        // special-case enum variants
-        resolved: ValueTyDefId,
-        infer_args: bool,
-    ) -> Substitution {
-        let last = path.segments().last();
-        let (segment, generic_def) = match resolved {
-            ValueTyDefId::FunctionId(it) => (last, Some(it.into())),
-            ValueTyDefId::StructId(it) => (last, Some(it.into())),
-            ValueTyDefId::UnionId(it) => (last, Some(it.into())),
-            ValueTyDefId::ConstId(it) => (last, Some(it.into())),
-            ValueTyDefId::StaticId(_) => (last, None),
-            ValueTyDefId::EnumVariantId(var) => {
-                // the generic args for an enum variant may be either specified
-                // on the segment referring to the enum, or on the segment
-                // referring to the variant. So `Option::<T>::None` and
-                // `Option::None::<T>` are both allowed (though the former is
-                // preferred). See also `def_ids_for_path_segments` in rustc.
-                let len = path.segments().len();
-                let penultimate = len.checked_sub(2).and_then(|idx| path.segments().get(idx));
-                let segment = match penultimate {
-                    Some(segment) if segment.args_and_bindings.is_some() => Some(segment),
-                    _ => last,
-                };
-                (segment, Some(var.lookup(self.db.upcast()).parent.into()))
-            }
-        };
-        if let Some(segment) = segment {
-            self.substs_from_path_segment(segment, generic_def, infer_args, None)
-        } else if let Some(generic_def) = generic_def {
-            // lang item
-            self.substs_from_args_and_bindings(None, Some(generic_def), infer_args, None)
-        } else {
-            Substitution::empty(Interner)
-        }
-    }
-
-    pub(super) fn substs_from_path_segment(
-        &mut self,
-        segment: PathSegment<'_>,
-        def: Option<GenericDefId>,
-        infer_args: bool,
-        explicit_self_ty: Option<Ty>,
-    ) -> Substitution {
-        self.substs_from_args_and_bindings(
-            segment.args_and_bindings,
-            def,
-            infer_args,
-            explicit_self_ty,
-        )
-    }
-
-    fn substs_from_args_and_bindings(
-        &mut self,
-        args_and_bindings: Option<&GenericArgs>,
-        def: Option<GenericDefId>,
-        infer_args: bool,
-        explicit_self_ty: Option<Ty>,
-    ) -> Substitution {
-        let Some(def) = def else { return Substitution::empty(Interner) };
-
-        // Order is
-        // - Optional Self parameter
-        // - Lifetime parameters
-        // - Type or Const parameters
-        // - Parent parameters
-        let def_generics = generics(self.db.upcast(), def);
-        let (
-            parent_params,
-            self_param,
-            type_params,
-            const_params,
-            impl_trait_params,
-            lifetime_params,
-        ) = def_generics.provenance_split();
-        let item_len =
-            self_param as usize + type_params + const_params + impl_trait_params + lifetime_params;
-        let total_len = parent_params + item_len;
-
-        let mut substs = Vec::new();
-
-        // we need to iterate the lifetime and type/const params separately as our order of them
-        // differs from the supplied syntax
-
-        let ty_error = || TyKind::Error.intern(Interner).cast(Interner);
-        let mut def_toc_iter = def_generics.iter_self_type_or_consts_id();
-        let fill_self_param = || {
-            if self_param {
-                let self_ty = explicit_self_ty.map(|x| x.cast(Interner)).unwrap_or_else(ty_error);
-
-                if let Some(id) = def_toc_iter.next() {
-                    assert!(matches!(id, GenericParamId::TypeParamId(_)));
-                    substs.push(self_ty);
-                }
-            }
-        };
-        let mut had_explicit_args = false;
-
-        if let Some(&GenericArgs { ref args, has_self_type, .. }) = args_and_bindings {
-            // Fill in the self param first
-            if has_self_type && self_param {
-                had_explicit_args = true;
-                if let Some(id) = def_toc_iter.next() {
-                    assert!(matches!(id, GenericParamId::TypeParamId(_)));
-                    had_explicit_args = true;
-                    if let GenericArg::Type(ty) = &args[0] {
-                        substs.push(self.lower_ty(*ty).cast(Interner));
-                    }
-                }
-            } else {
-                fill_self_param()
-            };
-
-            // Then fill in the supplied lifetime args, or error lifetimes if there are too few
-            // (default lifetimes aren't a thing)
-            for arg in args
-                .iter()
-                .filter_map(|arg| match arg {
-                    GenericArg::Lifetime(arg) => Some(self.lower_lifetime(arg)),
-                    _ => None,
-                })
-                .chain(iter::repeat(error_lifetime()))
-                .take(lifetime_params)
-            {
-                substs.push(arg.cast(Interner));
-            }
-
-            let skip = if has_self_type { 1 } else { 0 };
-            // Fill in supplied type and const args
-            // Note if non-lifetime args are provided, it should be all of them, but we can't rely on that
-            for (arg, id) in args
-                .iter()
-                .filter(|arg| !matches!(arg, GenericArg::Lifetime(_)))
-                .skip(skip)
-                .take(type_params + const_params)
-                .zip(def_toc_iter)
-            {
-                had_explicit_args = true;
-                let arg = generic_arg_to_chalk(
-                    self.db,
-                    id,
-                    arg,
-                    self,
-                    self.types_map,
-                    |this, type_ref| this.lower_ty(type_ref),
-                    |this, const_ref, ty| this.lower_const(const_ref, ty),
-                    |this, lifetime_ref| this.lower_lifetime(lifetime_ref),
-                );
-                substs.push(arg);
-            }
-        } else {
-            fill_self_param();
-        }
-
-        let param_to_err = |id| match id {
-            GenericParamId::ConstParamId(x) => unknown_const_as_generic(self.db.const_param_ty(x)),
-            GenericParamId::TypeParamId(_) => ty_error(),
-            GenericParamId::LifetimeParamId(_) => error_lifetime().cast(Interner),
-        };
-        // handle defaults. In expression or pattern path segments without
-        // explicitly specified type arguments, missing type arguments are inferred
-        // (i.e. defaults aren't used).
-        // Generic parameters for associated types are not supposed to have defaults, so we just
-        // ignore them.
-        let is_assoc_ty = || match def {
-            GenericDefId::TypeAliasId(id) => {
-                matches!(id.lookup(self.db.upcast()).container, ItemContainerId::TraitId(_))
-            }
-            _ => false,
-        };
-        let fill_defaults = (!infer_args || had_explicit_args) && !is_assoc_ty();
-        if fill_defaults {
-            let defaults = &*self.db.generic_defaults(def);
-            let (item, _parent) = defaults.split_at(item_len);
-            let parent_from = item_len - substs.len();
-
-            let mut rem =
-                def_generics.iter_id().skip(substs.len()).map(param_to_err).collect::<Vec<_>>();
-            // Fill in defaults for type/const params
-            for (idx, default_ty) in item[substs.len()..].iter().enumerate() {
-                // each default can depend on the previous parameters
-                let substs_so_far = Substitution::from_iter(
-                    Interner,
-                    substs.iter().cloned().chain(rem[idx..].iter().cloned()),
-                );
-                substs.push(default_ty.clone().substitute(Interner, &substs_so_far));
-            }
-            // Fill in remaining parent params
-            substs.extend(rem.drain(parent_from..));
-        } else {
-            // Fill in remaining def params and parent params
-            substs.extend(def_generics.iter_id().skip(substs.len()).map(param_to_err));
-        }
-
-        assert_eq!(substs.len(), total_len, "expected {} substs, got {}", total_len, substs.len());
-        Substitution::from_iter(Interner, substs)
-    }
-
-    pub(crate) fn lower_trait_ref_from_resolved_path(
-        &mut self,
-        resolved: TraitId,
-        segment: PathSegment<'_>,
-        explicit_self_ty: Ty,
-    ) -> TraitRef {
-        let substs = self.trait_ref_substs_from_path(segment, resolved, explicit_self_ty);
-        TraitRef { trait_id: to_chalk_trait_id(resolved), substitution: substs }
-    }
-
-    fn prohibit_generics(
-        &mut self,
-        path_id: PathId,
-        idx: u32,
-        segments: PathSegments<'_>,
-        reason: GenericArgsProhibitedReason,
-    ) {
-        segments.iter().zip(idx..).for_each(|(segment, idx)| {
-            if segment.args_and_bindings.is_some() {
-                self.push_diagnostic(
-                    path_id.type_ref(),
-                    TyLoweringDiagnosticKind::PathDiagnostic(
-                        PathLoweringDiagnostic::GenericArgsProhibited { segment: idx, reason },
-                    ),
-                );
-            }
-        });
+        ctx.lower_partly_resolved_path(resolution, false)
     }
 
     fn lower_trait_ref_from_path(
         &mut self,
         path_id: PathId,
         explicit_self_ty: Ty,
-    ) -> Option<TraitRef> {
-        let path = &self.types_map[path_id];
-        let resolved = match self.resolve_path_in_type_ns_fully(
-            path,
-            &mut Self::on_path_diagnostic_callback(path_id.type_ref()),
-        )? {
+    ) -> Option<(TraitRef, PathLoweringContext<'_, 'a>)> {
+        let mut ctx = self.at_path(path_id);
+        let resolved = match ctx.resolve_path_in_type_ns_fully()? {
             // FIXME(trait_alias): We need to handle trait alias here.
             TypeNs::TraitId(tr) => tr,
             _ => return None,
         };
-        // Do this after we verify it's indeed a trait to not confuse the user if they're not modules.
-        self.prohibit_generics(
-            path_id,
-            0,
-            path.segments().strip_last(),
-            GenericArgsProhibitedReason::Module,
-        );
-        let segment = path.segments().last().expect("path should have at least one segment");
-        Some(self.lower_trait_ref_from_resolved_path(resolved, segment, explicit_self_ty))
+        Some((ctx.lower_trait_ref_from_resolved_path(resolved, explicit_self_ty), ctx))
     }
 
     fn lower_trait_ref(
@@ -1308,16 +602,7 @@ impl<'a> TyLoweringContext<'a> {
         trait_ref: &HirTraitRef,
         explicit_self_ty: Ty,
     ) -> Option<TraitRef> {
-        self.lower_trait_ref_from_path(trait_ref.path, explicit_self_ty)
-    }
-
-    fn trait_ref_substs_from_path(
-        &mut self,
-        segment: PathSegment<'_>,
-        resolved: TraitId,
-        explicit_self_ty: Ty,
-    ) -> Substitution {
-        self.substs_from_path_segment(segment, Some(resolved.into()), false, Some(explicit_self_ty))
+        self.lower_trait_ref_from_path(trait_ref.path, explicit_self_ty).map(|it| it.0)
     }
 
     pub(crate) fn lower_where_predicate<'b>(
@@ -1365,11 +650,18 @@ impl<'a> TyLoweringContext<'a> {
         self_ty: Ty,
         ignore_bindings: bool,
     ) -> impl Iterator<Item = QuantifiedWhereClause> + use<'b, 'a> {
-        let mut trait_ref = None;
-        let clause = match bound {
-            &TypeBound::Path(path, TraitBoundModifier::None) => {
-                trait_ref = self.lower_trait_ref_from_path(path, self_ty);
-                trait_ref.clone().map(WhereClause::Implemented).map(crate::wrap_empty_binders)
+        let mut assoc_bounds = None;
+        let mut clause = None;
+        match bound {
+            &TypeBound::Path(path, TraitBoundModifier::None) | &TypeBound::ForLifetime(_, path) => {
+                // FIXME Don't silently drop the hrtb lifetimes here
+                if let Some((trait_ref, ctx)) = self.lower_trait_ref_from_path(path, self_ty) {
+                    if !ignore_bindings {
+                        assoc_bounds =
+                            ctx.assoc_type_bindings_from_type_bound(bound, trait_ref.clone());
+                    }
+                    clause = Some(crate::wrap_empty_binders(WhereClause::Implemented(trait_ref)));
+                }
             }
             &TypeBound::Path(path, TraitBoundModifier::Maybe) => {
                 let sized_trait = self
@@ -1381,170 +673,21 @@ impl<'a> TyLoweringContext<'a> {
                 // If we got another trait here ignore the bound completely.
                 let trait_id = self
                     .lower_trait_ref_from_path(path, self_ty.clone())
-                    .map(|trait_ref| trait_ref.hir_trait_id());
+                    .map(|(trait_ref, _)| trait_ref.hir_trait_id());
                 if trait_id == sized_trait {
                     self.unsized_types.insert(self_ty);
                 }
-                None
-            }
-            &TypeBound::ForLifetime(_, path) => {
-                // FIXME Don't silently drop the hrtb lifetimes here
-                trait_ref = self.lower_trait_ref_from_path(path, self_ty);
-                trait_ref.clone().map(WhereClause::Implemented).map(crate::wrap_empty_binders)
             }
             TypeBound::Lifetime(l) => {
                 let lifetime = self.lower_lifetime(l);
-                Some(crate::wrap_empty_binders(WhereClause::TypeOutlives(TypeOutlives {
+                clause = Some(crate::wrap_empty_binders(WhereClause::TypeOutlives(TypeOutlives {
                     ty: self_ty,
                     lifetime,
-                })))
+                })));
             }
-            TypeBound::Use(_) | TypeBound::Error => None,
-        };
-        clause.into_iter().chain(
-            trait_ref
-                .filter(move |_| !ignore_bindings)
-                .map(move |tr| self.assoc_type_bindings_from_type_bound(bound, tr))
-                .into_iter()
-                .flatten(),
-        )
-    }
-
-    fn assoc_type_bindings_from_type_bound<'b>(
-        &'b mut self,
-        bound: &'b TypeBound,
-        trait_ref: TraitRef,
-    ) -> impl Iterator<Item = QuantifiedWhereClause> + use<'b, 'a> {
-        let last_segment = match bound {
-            &TypeBound::Path(path, TraitBoundModifier::None) | &TypeBound::ForLifetime(_, path) => {
-                self.types_map[path].segments().last()
-            }
-            TypeBound::Path(_, TraitBoundModifier::Maybe)
-            | TypeBound::Use(_)
-            | TypeBound::Error
-            | TypeBound::Lifetime(_) => None,
-        };
-        last_segment
-            .into_iter()
-            .filter_map(|segment| segment.args_and_bindings)
-            .flat_map(|args_and_bindings| args_and_bindings.bindings.iter())
-            .flat_map(move |binding| {
-                let found = associated_type_by_name_including_super_traits(
-                    self.db,
-                    trait_ref.clone(),
-                    &binding.name,
-                );
-                let (super_trait_ref, associated_ty) = match found {
-                    None => return SmallVec::new(),
-                    Some(t) => t,
-                };
-                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
-                // generic params. It's inefficient to splice the `Substitution`s, so we may want
-                // that method to optionally take parent `Substitution` as we already know them at
-                // this point (`super_trait_ref.substitution`).
-                let substitution = self.substs_from_path_segment(
-                    // FIXME: This is hack. We shouldn't really build `PathSegment` directly.
-                    PathSegment { name: &binding.name, args_and_bindings: binding.args.as_ref() },
-                    Some(associated_ty.into()),
-                    false, // this is not relevant
-                    Some(super_trait_ref.self_type_parameter(Interner)),
-                );
-                let self_params = generics(self.db.upcast(), associated_ty.into()).len_self();
-                let substitution = Substitution::from_iter(
-                    Interner,
-                    substitution
-                        .iter(Interner)
-                        .take(self_params)
-                        .chain(super_trait_ref.substitution.iter(Interner)),
-                );
-                let projection_ty = ProjectionTy {
-                    associated_ty_id: to_assoc_type_id(associated_ty),
-                    substitution,
-                };
-                let mut predicates: SmallVec<[_; 1]> = SmallVec::with_capacity(
-                    binding.type_ref.as_ref().map_or(0, |_| 1) + binding.bounds.len(),
-                );
-                if let Some(type_ref) = binding.type_ref {
-                    match (&self.types_map[type_ref], self.impl_trait_mode.mode) {
-                        (TypeRef::ImplTrait(_), ImplTraitLoweringMode::Disallowed) => (),
-                        (_, ImplTraitLoweringMode::Disallowed | ImplTraitLoweringMode::Opaque) => {
-                            let ty = self.lower_ty(type_ref);
-                            let alias_eq =
-                                AliasEq { alias: AliasTy::Projection(projection_ty.clone()), ty };
-                            predicates
-                                .push(crate::wrap_empty_binders(WhereClause::AliasEq(alias_eq)));
-                        }
-                        (_, ImplTraitLoweringMode::Param | ImplTraitLoweringMode::Variable) => {
-                            // Find the generic index for the target of our `bound`
-                            let target_param_idx = self
-                                .resolver
-                                .where_predicates_in_scope()
-                                .find_map(|(p, _)| match p {
-                                    WherePredicate::TypeBound {
-                                        target: WherePredicateTypeTarget::TypeOrConstParam(idx),
-                                        bound: b,
-                                    } if b == bound => Some(idx),
-                                    _ => None,
-                                });
-                            let ty = if let Some(target_param_idx) = target_param_idx {
-                                let mut counter = 0;
-                                let generics = self.generics().expect("generics in scope");
-                                for (idx, data) in generics.iter_self_type_or_consts() {
-                                    // Count the number of `impl Trait` things that appear before
-                                    // the target of our `bound`.
-                                    // Our counter within `impl_trait_mode` should be that number
-                                    // to properly lower each types within `type_ref`
-                                    if data.type_param().is_some_and(|p| {
-                                        p.provenance == TypeParamProvenance::ArgumentImplTrait
-                                    }) {
-                                        counter += 1;
-                                    }
-                                    if idx == *target_param_idx {
-                                        break;
-                                    }
-                                }
-                                let mut ext = TyLoweringContext::new_maybe_unowned(
-                                    self.db,
-                                    self.resolver,
-                                    self.types_map,
-                                    self.types_source_map,
-                                    self.owner,
-                                )
-                                .with_type_param_mode(self.type_param_mode);
-                                match self.impl_trait_mode.mode {
-                                    ImplTraitLoweringMode::Param => {
-                                        ext.impl_trait_mode =
-                                            ImplTraitLoweringState::param(counter);
-                                    }
-                                    ImplTraitLoweringMode::Variable => {
-                                        ext.impl_trait_mode =
-                                            ImplTraitLoweringState::variable(counter);
-                                    }
-                                    _ => unreachable!(),
-                                }
-                                let ty = ext.lower_ty(type_ref);
-                                self.diagnostics.extend(ext.diagnostics);
-                                ty
-                            } else {
-                                self.lower_ty(type_ref)
-                            };
-
-                            let alias_eq =
-                                AliasEq { alias: AliasTy::Projection(projection_ty.clone()), ty };
-                            predicates
-                                .push(crate::wrap_empty_binders(WhereClause::AliasEq(alias_eq)));
-                        }
-                    }
-                }
-                for bound in binding.bounds.iter() {
-                    predicates.extend(self.lower_type_bound(
-                        bound,
-                        TyKind::Alias(AliasTy::Projection(projection_ty.clone())).intern(Interner),
-                        false,
-                    ));
-                }
-                predicates
-            })
+            TypeBound::Use(_) | TypeBound::Error => {}
+        }
+        clause.into_iter().chain(assoc_bounds.into_iter().flatten())
     }
 
     fn lower_dyn_trait(&mut self, bounds: &[TypeBound]) -> Ty {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/lower/diagnostics.rs b/src/tools/rust-analyzer/crates/hir-ty/src/lower/diagnostics.rs
index 7fe196cdbb59a..5c77bcd0736ab 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/lower/diagnostics.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/lower/diagnostics.rs
@@ -26,11 +26,11 @@ pub enum GenericArgsProhibitedReason {
     Static,
     /// When there is a generic enum, within the expression `Enum::Variant`,
     /// either `Enum` or `Variant` are allowed to have generic arguments, but not both.
-    // FIXME: This is not used now but it should be.
     EnumVariant,
 }
 
 #[derive(Debug, PartialEq, Eq, Clone)]
 pub enum PathLoweringDiagnostic {
     GenericArgsProhibited { segment: u32, reason: GenericArgsProhibitedReason },
+    ParenthesizedGenericArgsWithoutFnTrait { segment: u32 },
 }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/lower/path.rs b/src/tools/rust-analyzer/crates/hir-ty/src/lower/path.rs
new file mode 100644
index 0000000000000..22c5bb9923f05
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/lower/path.rs
@@ -0,0 +1,911 @@
+//! A wrapper around [`TyLoweringContext`] specifically for lowering paths.
+
+use std::iter;
+
+use chalk_ir::{cast::Cast, fold::Shift, BoundVar};
+use either::Either;
+use hir_def::{
+    data::TraitFlags,
+    expr_store::HygieneId,
+    generics::{TypeParamProvenance, WherePredicate, WherePredicateTypeTarget},
+    path::{GenericArg, GenericArgs, Path, PathSegment, PathSegments},
+    resolver::{ResolveValueResult, TypeNs, ValueNs},
+    type_ref::{TypeBound, TypeRef},
+    GenericDefId, GenericParamId, ItemContainerId, Lookup, TraitId,
+};
+use smallvec::SmallVec;
+use stdx::never;
+
+use crate::{
+    consteval::unknown_const_as_generic,
+    error_lifetime,
+    generics::generics,
+    lower::{
+        generic_arg_to_chalk, named_associated_type_shorthand_candidates, ImplTraitLoweringState,
+    },
+    to_assoc_type_id, to_chalk_trait_id, to_placeholder_idx,
+    utils::associated_type_by_name_including_super_traits,
+    AliasEq, AliasTy, GenericArgsProhibitedReason, ImplTraitLoweringMode, Interner,
+    ParamLoweringMode, PathLoweringDiagnostic, ProjectionTy, QuantifiedWhereClause, Substitution,
+    TraitRef, Ty, TyBuilder, TyDefId, TyKind, TyLoweringContext, ValueTyDefId, WhereClause,
+};
+
+type CallbackData<'a> = Either<
+    super::PathDiagnosticCallbackData,
+    crate::infer::diagnostics::PathDiagnosticCallbackData<'a>,
+>;
+
+// We cannot use `&mut dyn FnMut()` because of lifetime issues, and we don't want to use `Box<dyn FnMut()>`
+// because of the allocation, so we create a lifetime-less callback, tailored for our needs.
+pub(crate) struct PathDiagnosticCallback<'a> {
+    pub(crate) data: CallbackData<'a>,
+    pub(crate) callback: fn(&CallbackData<'_>, &mut TyLoweringContext<'_>, PathLoweringDiagnostic),
+}
+
+pub(crate) struct PathLoweringContext<'a, 'b> {
+    ctx: &'a mut TyLoweringContext<'b>,
+    on_diagnostic: PathDiagnosticCallback<'a>,
+    path: &'a Path,
+    segments: PathSegments<'a>,
+    current_segment_idx: usize,
+    /// Contains the previous segment if `current_segment_idx == segments.len()`
+    current_or_prev_segment: PathSegment<'a>,
+}
+
+impl<'a, 'b> PathLoweringContext<'a, 'b> {
+    #[inline]
+    pub(crate) fn new(
+        ctx: &'a mut TyLoweringContext<'b>,
+        on_diagnostic: PathDiagnosticCallback<'a>,
+        path: &'a Path,
+    ) -> Self {
+        let segments = path.segments();
+        let first_segment = segments.first().unwrap_or(PathSegment::MISSING);
+        Self {
+            ctx,
+            on_diagnostic,
+            path,
+            segments,
+            current_segment_idx: 0,
+            current_or_prev_segment: first_segment,
+        }
+    }
+
+    #[inline]
+    #[cold]
+    fn on_diagnostic(&mut self, diag: PathLoweringDiagnostic) {
+        (self.on_diagnostic.callback)(&self.on_diagnostic.data, self.ctx, diag);
+    }
+
+    #[inline]
+    pub(crate) fn ty_ctx(&mut self) -> &mut TyLoweringContext<'b> {
+        self.ctx
+    }
+
+    #[inline]
+    fn current_segment_u32(&self) -> u32 {
+        self.current_segment_idx as u32
+    }
+
+    #[inline]
+    fn skip_resolved_segment(&mut self) {
+        if !matches!(self.path, Path::LangItem(..)) {
+            // In lang items, the resolved "segment" is not one of the segments. Perhaps we should've put it
+            // point at -1, but I don't feel this is clearer.
+            self.current_segment_idx += 1;
+        }
+        self.update_current_segment();
+    }
+
+    #[inline]
+    fn update_current_segment(&mut self) {
+        self.current_or_prev_segment =
+            self.segments.get(self.current_segment_idx).unwrap_or(self.current_or_prev_segment);
+    }
+
+    #[inline]
+    pub(crate) fn ignore_last_segment(&mut self) {
+        self.segments = self.segments.strip_last();
+    }
+
+    #[inline]
+    pub(crate) fn set_current_segment(&mut self, segment: usize) {
+        self.current_segment_idx = segment;
+        self.current_or_prev_segment = self
+            .segments
+            .get(segment)
+            .expect("invalid segment passed to PathLoweringContext::set_current_segment()");
+    }
+
+    pub(crate) fn lower_ty_relative_path(
+        &mut self,
+        ty: Ty,
+        // We need the original resolution to lower `Self::AssocTy` correctly
+        res: Option<TypeNs>,
+    ) -> (Ty, Option<TypeNs>) {
+        match self.segments.len() - self.current_segment_idx {
+            0 => (ty, res),
+            1 => {
+                // resolve unselected assoc types
+                (self.select_associated_type(res), None)
+            }
+            _ => {
+                // FIXME report error (ambiguous associated type)
+                (TyKind::Error.intern(Interner), None)
+            }
+        }
+    }
+
+    fn prohibit_parenthesized_generic_args(&mut self) -> bool {
+        if let Some(generic_args) = self.current_or_prev_segment.args_and_bindings {
+            if generic_args.desugared_from_fn {
+                let segment = self.current_segment_u32();
+                self.on_diagnostic(
+                    PathLoweringDiagnostic::ParenthesizedGenericArgsWithoutFnTrait { segment },
+                );
+                return true;
+            }
+        }
+        false
+    }
+
+    // When calling this, the current segment is the resolved segment (we don't advance it yet).
+    pub(crate) fn lower_partly_resolved_path(
+        &mut self,
+        resolution: TypeNs,
+        infer_args: bool,
+    ) -> (Ty, Option<TypeNs>) {
+        let remaining_segments = self.segments.skip(self.current_segment_idx + 1);
+
+        let ty = match resolution {
+            TypeNs::TraitId(trait_) => {
+                let ty = match remaining_segments.len() {
+                    1 => {
+                        let trait_ref = self.lower_trait_ref_from_resolved_path(
+                            trait_,
+                            TyKind::Error.intern(Interner),
+                        );
+
+                        self.skip_resolved_segment();
+                        let segment = self.current_or_prev_segment;
+                        let found =
+                            self.ctx.db.trait_data(trait_).associated_type_by_name(segment.name);
+
+                        match found {
+                            Some(associated_ty) => {
+                                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
+                                // generic params. It's inefficient to splice the `Substitution`s, so we may want
+                                // that method to optionally take parent `Substitution` as we already know them at
+                                // this point (`trait_ref.substitution`).
+                                let substitution = self.substs_from_path_segment(
+                                    associated_ty.into(),
+                                    false,
+                                    None,
+                                );
+                                let len_self =
+                                    generics(self.ctx.db.upcast(), associated_ty.into()).len_self();
+                                let substitution = Substitution::from_iter(
+                                    Interner,
+                                    substitution
+                                        .iter(Interner)
+                                        .take(len_self)
+                                        .chain(trait_ref.substitution.iter(Interner)),
+                                );
+                                TyKind::Alias(AliasTy::Projection(ProjectionTy {
+                                    associated_ty_id: to_assoc_type_id(associated_ty),
+                                    substitution,
+                                }))
+                                .intern(Interner)
+                            }
+                            None => {
+                                // FIXME: report error (associated type not found)
+                                TyKind::Error.intern(Interner)
+                            }
+                        }
+                    }
+                    0 => {
+                        // Trait object type without dyn; this should be handled in upstream. See
+                        // `lower_path()`.
+                        stdx::never!("unexpected fully resolved trait path");
+                        TyKind::Error.intern(Interner)
+                    }
+                    _ => {
+                        // FIXME report error (ambiguous associated type)
+                        TyKind::Error.intern(Interner)
+                    }
+                };
+                return (ty, None);
+            }
+            TypeNs::TraitAliasId(_) => {
+                // FIXME(trait_alias): Implement trait alias.
+                return (TyKind::Error.intern(Interner), None);
+            }
+            TypeNs::GenericParam(param_id) => match self.ctx.type_param_mode {
+                ParamLoweringMode::Placeholder => {
+                    TyKind::Placeholder(to_placeholder_idx(self.ctx.db, param_id.into()))
+                }
+                ParamLoweringMode::Variable => {
+                    let idx = match self
+                        .ctx
+                        .generics()
+                        .expect("generics in scope")
+                        .type_or_const_param_idx(param_id.into())
+                    {
+                        None => {
+                            never!("no matching generics");
+                            return (TyKind::Error.intern(Interner), None);
+                        }
+                        Some(idx) => idx,
+                    };
+
+                    TyKind::BoundVar(BoundVar::new(self.ctx.in_binders, idx))
+                }
+            }
+            .intern(Interner),
+            TypeNs::SelfType(impl_id) => {
+                let generics = self.ctx.generics().expect("impl should have generic param scope");
+
+                match self.ctx.type_param_mode {
+                    ParamLoweringMode::Placeholder => {
+                        // `def` can be either impl itself or item within, and we need impl itself
+                        // now.
+                        let generics = generics.parent_or_self();
+                        let subst = generics.placeholder_subst(self.ctx.db);
+                        self.ctx.db.impl_self_ty(impl_id).substitute(Interner, &subst)
+                    }
+                    ParamLoweringMode::Variable => {
+                        let starting_from = match generics.def() {
+                            GenericDefId::ImplId(_) => 0,
+                            // `def` is an item within impl. We need to substitute `BoundVar`s but
+                            // remember that they are for parent (i.e. impl) generic params so they
+                            // come after our own params.
+                            _ => generics.len_self(),
+                        };
+                        TyBuilder::impl_self_ty(self.ctx.db, impl_id)
+                            .fill_with_bound_vars(self.ctx.in_binders, starting_from)
+                            .build()
+                    }
+                }
+            }
+            TypeNs::AdtSelfType(adt) => {
+                let generics = generics(self.ctx.db.upcast(), adt.into());
+                let substs = match self.ctx.type_param_mode {
+                    ParamLoweringMode::Placeholder => generics.placeholder_subst(self.ctx.db),
+                    ParamLoweringMode::Variable => {
+                        generics.bound_vars_subst(self.ctx.db, self.ctx.in_binders)
+                    }
+                };
+                self.ctx.db.ty(adt.into()).substitute(Interner, &substs)
+            }
+
+            TypeNs::AdtId(it) => self.lower_path_inner(it.into(), infer_args),
+            TypeNs::BuiltinType(it) => self.lower_path_inner(it.into(), infer_args),
+            TypeNs::TypeAliasId(it) => self.lower_path_inner(it.into(), infer_args),
+            // FIXME: report error
+            TypeNs::EnumVariantId(_) => return (TyKind::Error.intern(Interner), None),
+        };
+
+        self.skip_resolved_segment();
+        self.lower_ty_relative_path(ty, Some(resolution))
+    }
+
+    fn handle_type_ns_resolution(&mut self, resolution: &TypeNs) {
+        let mut prohibit_generics_on_resolved = |reason| {
+            if self.current_or_prev_segment.args_and_bindings.is_some() {
+                let segment = self.current_segment_u32();
+                self.on_diagnostic(PathLoweringDiagnostic::GenericArgsProhibited {
+                    segment,
+                    reason,
+                });
+            }
+        };
+
+        match resolution {
+            TypeNs::SelfType(_) => {
+                prohibit_generics_on_resolved(GenericArgsProhibitedReason::SelfTy)
+            }
+            TypeNs::GenericParam(_) => {
+                prohibit_generics_on_resolved(GenericArgsProhibitedReason::TyParam)
+            }
+            TypeNs::AdtSelfType(_) => {
+                prohibit_generics_on_resolved(GenericArgsProhibitedReason::SelfTy)
+            }
+            TypeNs::BuiltinType(_) => {
+                prohibit_generics_on_resolved(GenericArgsProhibitedReason::PrimitiveTy)
+            }
+            TypeNs::AdtId(_)
+            | TypeNs::EnumVariantId(_)
+            | TypeNs::TypeAliasId(_)
+            | TypeNs::TraitId(_)
+            | TypeNs::TraitAliasId(_) => {}
+        }
+    }
+
+    pub(crate) fn resolve_path_in_type_ns_fully(&mut self) -> Option<TypeNs> {
+        let (res, unresolved) = self.resolve_path_in_type_ns()?;
+        if unresolved.is_some() {
+            return None;
+        }
+        Some(res)
+    }
+
+    pub(crate) fn resolve_path_in_type_ns(&mut self) -> Option<(TypeNs, Option<usize>)> {
+        let (resolution, remaining_index, _, prefix_info) = self
+            .ctx
+            .resolver
+            .resolve_path_in_type_ns_with_prefix_info(self.ctx.db.upcast(), self.path)?;
+
+        let segments = self.segments;
+        if segments.is_empty() || matches!(self.path, Path::LangItem(..)) {
+            // `segments.is_empty()` can occur with `self`.
+            return Some((resolution, remaining_index));
+        }
+
+        let (module_segments, resolved_segment_idx, enum_segment) = match remaining_index {
+            None if prefix_info.enum_variant => {
+                (segments.strip_last_two(), segments.len() - 1, Some(segments.len() - 2))
+            }
+            None => (segments.strip_last(), segments.len() - 1, None),
+            Some(i) => (segments.take(i - 1), i - 1, None),
+        };
+
+        self.current_segment_idx = resolved_segment_idx;
+        self.current_or_prev_segment =
+            segments.get(resolved_segment_idx).expect("should have resolved segment");
+
+        if matches!(self.path, Path::BarePath(..)) {
+            // Bare paths cannot have generics, so skip them as an optimization.
+            return Some((resolution, remaining_index));
+        }
+
+        for (i, mod_segment) in module_segments.iter().enumerate() {
+            if mod_segment.args_and_bindings.is_some() {
+                self.on_diagnostic(PathLoweringDiagnostic::GenericArgsProhibited {
+                    segment: i as u32,
+                    reason: GenericArgsProhibitedReason::Module,
+                });
+            }
+        }
+
+        if let Some(enum_segment) = enum_segment {
+            if segments.get(enum_segment).is_some_and(|it| it.args_and_bindings.is_some())
+                && segments.get(enum_segment + 1).is_some_and(|it| it.args_and_bindings.is_some())
+            {
+                self.on_diagnostic(PathLoweringDiagnostic::GenericArgsProhibited {
+                    segment: (enum_segment + 1) as u32,
+                    reason: GenericArgsProhibitedReason::EnumVariant,
+                });
+            }
+        }
+
+        self.handle_type_ns_resolution(&resolution);
+
+        Some((resolution, remaining_index))
+    }
+
+    pub(crate) fn resolve_path_in_value_ns(
+        &mut self,
+        hygiene_id: HygieneId,
+    ) -> Option<ResolveValueResult> {
+        let (res, prefix_info) = self.ctx.resolver.resolve_path_in_value_ns_with_prefix_info(
+            self.ctx.db.upcast(),
+            self.path,
+            hygiene_id,
+        )?;
+
+        let segments = self.segments;
+        if segments.is_empty() || matches!(self.path, Path::LangItem(..)) {
+            // `segments.is_empty()` can occur with `self`.
+            return Some(res);
+        }
+
+        let (mod_segments, enum_segment, resolved_segment_idx) = match res {
+            ResolveValueResult::Partial(_, unresolved_segment, _) => {
+                (segments.take(unresolved_segment - 1), None, unresolved_segment - 1)
+            }
+            ResolveValueResult::ValueNs(ValueNs::EnumVariantId(_), _)
+                if prefix_info.enum_variant =>
+            {
+                (segments.strip_last_two(), segments.len().checked_sub(2), segments.len() - 1)
+            }
+            ResolveValueResult::ValueNs(..) => (segments.strip_last(), None, segments.len() - 1),
+        };
+
+        self.current_segment_idx = resolved_segment_idx;
+        self.current_or_prev_segment =
+            segments.get(resolved_segment_idx).expect("should have resolved segment");
+
+        for (i, mod_segment) in mod_segments.iter().enumerate() {
+            if mod_segment.args_and_bindings.is_some() {
+                self.on_diagnostic(PathLoweringDiagnostic::GenericArgsProhibited {
+                    segment: i as u32,
+                    reason: GenericArgsProhibitedReason::Module,
+                });
+            }
+        }
+
+        if let Some(enum_segment) = enum_segment {
+            if segments.get(enum_segment).is_some_and(|it| it.args_and_bindings.is_some())
+                && segments.get(enum_segment + 1).is_some_and(|it| it.args_and_bindings.is_some())
+            {
+                self.on_diagnostic(PathLoweringDiagnostic::GenericArgsProhibited {
+                    segment: (enum_segment + 1) as u32,
+                    reason: GenericArgsProhibitedReason::EnumVariant,
+                });
+            }
+        }
+
+        match &res {
+            ResolveValueResult::ValueNs(resolution, _) => {
+                let resolved_segment_idx = self.current_segment_u32();
+                let resolved_segment = self.current_or_prev_segment;
+
+                let mut prohibit_generics_on_resolved = |reason| {
+                    if resolved_segment.args_and_bindings.is_some() {
+                        self.on_diagnostic(PathLoweringDiagnostic::GenericArgsProhibited {
+                            segment: resolved_segment_idx,
+                            reason,
+                        });
+                    }
+                };
+
+                match resolution {
+                    ValueNs::ImplSelf(_) => {
+                        prohibit_generics_on_resolved(GenericArgsProhibitedReason::SelfTy)
+                    }
+                    // FIXME: rustc generates E0107 (incorrect number of generic arguments) and not
+                    // E0109 (generic arguments provided for a type that doesn't accept them) for
+                    // consts and statics, presumably as a defense against future in which consts
+                    // and statics can be generic, or just because it was easier for rustc implementors.
+                    // That means we'll show the wrong error code. Because of us it's easier to do it
+                    // this way :)
+                    ValueNs::GenericParam(_) | ValueNs::ConstId(_) => {
+                        prohibit_generics_on_resolved(GenericArgsProhibitedReason::Const)
+                    }
+                    ValueNs::StaticId(_) => {
+                        prohibit_generics_on_resolved(GenericArgsProhibitedReason::Static)
+                    }
+                    ValueNs::FunctionId(_) | ValueNs::StructId(_) | ValueNs::EnumVariantId(_) => {}
+                    ValueNs::LocalBinding(_) => {}
+                }
+            }
+            ResolveValueResult::Partial(resolution, _, _) => {
+                self.handle_type_ns_resolution(resolution);
+            }
+        };
+        Some(res)
+    }
+
+    fn select_associated_type(&mut self, res: Option<TypeNs>) -> Ty {
+        let Some((generics, res)) = self.ctx.generics().zip(res) else {
+            return TyKind::Error.intern(Interner);
+        };
+        let segment = self.current_or_prev_segment;
+        let ty = named_associated_type_shorthand_candidates(
+            self.ctx.db,
+            generics.def(),
+            res,
+            Some(segment.name.clone()),
+            move |name, t, associated_ty| {
+                let generics = self.ctx.generics().unwrap();
+
+                if name != segment.name {
+                    return None;
+                }
+
+                let parent_subst = t.substitution.clone();
+                let parent_subst = match self.ctx.type_param_mode {
+                    ParamLoweringMode::Placeholder => {
+                        // if we're lowering to placeholders, we have to put them in now.
+                        let s = generics.placeholder_subst(self.ctx.db);
+                        s.apply(parent_subst, Interner)
+                    }
+                    ParamLoweringMode::Variable => {
+                        // We need to shift in the bound vars, since
+                        // `named_associated_type_shorthand_candidates` does not do that.
+                        parent_subst.shifted_in_from(Interner, self.ctx.in_binders)
+                    }
+                };
+
+                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
+                // generic params. It's inefficient to splice the `Substitution`s, so we may want
+                // that method to optionally take parent `Substitution` as we already know them at
+                // this point (`t.substitution`).
+                let substs = self.substs_from_path_segment(associated_ty.into(), false, None);
+
+                let len_self =
+                    crate::generics::generics(self.ctx.db.upcast(), associated_ty.into())
+                        .len_self();
+
+                let substs = Substitution::from_iter(
+                    Interner,
+                    substs.iter(Interner).take(len_self).chain(parent_subst.iter(Interner)),
+                );
+
+                Some(
+                    TyKind::Alias(AliasTy::Projection(ProjectionTy {
+                        associated_ty_id: to_assoc_type_id(associated_ty),
+                        substitution: substs,
+                    }))
+                    .intern(Interner),
+                )
+            },
+        );
+
+        ty.unwrap_or_else(|| TyKind::Error.intern(Interner))
+    }
+
+    fn lower_path_inner(&mut self, typeable: TyDefId, infer_args: bool) -> Ty {
+        let generic_def = match typeable {
+            TyDefId::BuiltinType(builtin) => return TyBuilder::builtin(builtin),
+            TyDefId::AdtId(it) => it.into(),
+            TyDefId::TypeAliasId(it) => it.into(),
+        };
+        let substs = self.substs_from_path_segment(generic_def, infer_args, None);
+        self.ctx.db.ty(typeable).substitute(Interner, &substs)
+    }
+
+    /// Collect generic arguments from a path into a `Substs`. See also
+    /// `create_substs_for_ast_path` and `def_to_ty` in rustc.
+    pub(crate) fn substs_from_path(
+        &mut self,
+        // Note that we don't call `db.value_type(resolved)` here,
+        // `ValueTyDefId` is just a convenient way to pass generics and
+        // special-case enum variants
+        resolved: ValueTyDefId,
+        infer_args: bool,
+    ) -> Substitution {
+        let prev_current_segment_idx = self.current_segment_idx;
+        let prev_current_segment = self.current_or_prev_segment;
+
+        let generic_def = match resolved {
+            ValueTyDefId::FunctionId(it) => it.into(),
+            ValueTyDefId::StructId(it) => it.into(),
+            ValueTyDefId::UnionId(it) => it.into(),
+            ValueTyDefId::ConstId(it) => it.into(),
+            ValueTyDefId::StaticId(_) => return Substitution::empty(Interner),
+            ValueTyDefId::EnumVariantId(var) => {
+                // the generic args for an enum variant may be either specified
+                // on the segment referring to the enum, or on the segment
+                // referring to the variant. So `Option::<T>::None` and
+                // `Option::None::<T>` are both allowed (though the former is
+                // FIXME: This isn't strictly correct, enum variants may be used not through the enum
+                // (via `use Enum::Variant`). The resolver returns whether they were, but we don't have its result
+                // available here. The worst that can happen is that we will show some confusing diagnostics to the user,
+                // if generics exist on the module and they don't match with the variant.
+                // preferred). See also `def_ids_for_path_segments` in rustc.
+                //
+                // `wrapping_sub(1)` will return a number which `get` will return None for if current_segment_idx<2.
+                // This simplifies the code a bit.
+                let penultimate_idx = self.current_segment_idx.wrapping_sub(1);
+                let penultimate = self.segments.get(penultimate_idx);
+                if let Some(penultimate) = penultimate {
+                    if self.current_or_prev_segment.args_and_bindings.is_none()
+                        && penultimate.args_and_bindings.is_some()
+                    {
+                        self.current_segment_idx = penultimate_idx;
+                        self.current_or_prev_segment = penultimate;
+                    }
+                }
+                var.lookup(self.ctx.db.upcast()).parent.into()
+            }
+        };
+        let result = self.substs_from_path_segment(generic_def, infer_args, None);
+        self.current_segment_idx = prev_current_segment_idx;
+        self.current_or_prev_segment = prev_current_segment;
+        result
+    }
+
+    pub(crate) fn substs_from_path_segment(
+        &mut self,
+        def: GenericDefId,
+        infer_args: bool,
+        explicit_self_ty: Option<Ty>,
+    ) -> Substitution {
+        let prohibit_parens = match def {
+            GenericDefId::TraitId(trait_) => {
+                let trait_data = self.ctx.db.trait_data(trait_);
+                !trait_data.flags.contains(TraitFlags::RUSTC_PAREN_SUGAR)
+            }
+            _ => true,
+        };
+        if prohibit_parens && self.prohibit_parenthesized_generic_args() {
+            return TyBuilder::unknown_subst(self.ctx.db, def);
+        }
+
+        self.substs_from_args_and_bindings(
+            self.current_or_prev_segment.args_and_bindings,
+            def,
+            infer_args,
+            explicit_self_ty,
+        )
+    }
+
+    pub(super) fn substs_from_args_and_bindings(
+        &mut self,
+        args_and_bindings: Option<&GenericArgs>,
+        def: GenericDefId,
+        infer_args: bool,
+        explicit_self_ty: Option<Ty>,
+    ) -> Substitution {
+        // Order is
+        // - Optional Self parameter
+        // - Lifetime parameters
+        // - Type or Const parameters
+        // - Parent parameters
+        let def_generics = generics(self.ctx.db.upcast(), def);
+        let (
+            parent_params,
+            self_param,
+            type_params,
+            const_params,
+            impl_trait_params,
+            lifetime_params,
+        ) = def_generics.provenance_split();
+        let item_len =
+            self_param as usize + type_params + const_params + impl_trait_params + lifetime_params;
+        let total_len = parent_params + item_len;
+
+        let mut substs = Vec::new();
+
+        // we need to iterate the lifetime and type/const params separately as our order of them
+        // differs from the supplied syntax
+
+        let ty_error = || TyKind::Error.intern(Interner).cast(Interner);
+        let mut def_toc_iter = def_generics.iter_self_type_or_consts_id();
+        let fill_self_param = || {
+            if self_param {
+                let self_ty = explicit_self_ty.map(|x| x.cast(Interner)).unwrap_or_else(ty_error);
+
+                if let Some(id) = def_toc_iter.next() {
+                    assert!(matches!(id, GenericParamId::TypeParamId(_)));
+                    substs.push(self_ty);
+                }
+            }
+        };
+        let mut had_explicit_args = false;
+
+        if let Some(&GenericArgs { ref args, has_self_type, .. }) = args_and_bindings {
+            // Fill in the self param first
+            if has_self_type && self_param {
+                had_explicit_args = true;
+                if let Some(id) = def_toc_iter.next() {
+                    assert!(matches!(id, GenericParamId::TypeParamId(_)));
+                    had_explicit_args = true;
+                    if let GenericArg::Type(ty) = &args[0] {
+                        substs.push(self.ctx.lower_ty(*ty).cast(Interner));
+                    }
+                }
+            } else {
+                fill_self_param()
+            };
+
+            // Then fill in the supplied lifetime args, or error lifetimes if there are too few
+            // (default lifetimes aren't a thing)
+            for arg in args
+                .iter()
+                .filter_map(|arg| match arg {
+                    GenericArg::Lifetime(arg) => Some(self.ctx.lower_lifetime(arg)),
+                    _ => None,
+                })
+                .chain(iter::repeat(error_lifetime()))
+                .take(lifetime_params)
+            {
+                substs.push(arg.cast(Interner));
+            }
+
+            let skip = if has_self_type { 1 } else { 0 };
+            // Fill in supplied type and const args
+            // Note if non-lifetime args are provided, it should be all of them, but we can't rely on that
+            for (arg, id) in args
+                .iter()
+                .filter(|arg| !matches!(arg, GenericArg::Lifetime(_)))
+                .skip(skip)
+                .take(type_params + const_params)
+                .zip(def_toc_iter)
+            {
+                had_explicit_args = true;
+                let arg = generic_arg_to_chalk(
+                    self.ctx.db,
+                    id,
+                    arg,
+                    self.ctx,
+                    self.ctx.types_map,
+                    |ctx, type_ref| ctx.lower_ty(type_ref),
+                    |ctx, const_ref, ty| ctx.lower_const(const_ref, ty),
+                    |ctx, lifetime_ref| ctx.lower_lifetime(lifetime_ref),
+                );
+                substs.push(arg);
+            }
+        } else {
+            fill_self_param();
+        }
+
+        let param_to_err = |id| match id {
+            GenericParamId::ConstParamId(x) => {
+                unknown_const_as_generic(self.ctx.db.const_param_ty(x))
+            }
+            GenericParamId::TypeParamId(_) => ty_error(),
+            GenericParamId::LifetimeParamId(_) => error_lifetime().cast(Interner),
+        };
+        // handle defaults. In expression or pattern path segments without
+        // explicitly specified type arguments, missing type arguments are inferred
+        // (i.e. defaults aren't used).
+        // Generic parameters for associated types are not supposed to have defaults, so we just
+        // ignore them.
+        let is_assoc_ty = || match def {
+            GenericDefId::TypeAliasId(id) => {
+                matches!(id.lookup(self.ctx.db.upcast()).container, ItemContainerId::TraitId(_))
+            }
+            _ => false,
+        };
+        let fill_defaults = (!infer_args || had_explicit_args) && !is_assoc_ty();
+        if fill_defaults {
+            let defaults = &*self.ctx.db.generic_defaults(def);
+            let (item, _parent) = defaults.split_at(item_len);
+            let parent_from = item_len - substs.len();
+
+            let mut rem =
+                def_generics.iter_id().skip(substs.len()).map(param_to_err).collect::<Vec<_>>();
+            // Fill in defaults for type/const params
+            for (idx, default_ty) in item[substs.len()..].iter().enumerate() {
+                // each default can depend on the previous parameters
+                let substs_so_far = Substitution::from_iter(
+                    Interner,
+                    substs.iter().cloned().chain(rem[idx..].iter().cloned()),
+                );
+                substs.push(default_ty.clone().substitute(Interner, &substs_so_far));
+            }
+            // Fill in remaining parent params
+            substs.extend(rem.drain(parent_from..));
+        } else {
+            // Fill in remaining def params and parent params
+            substs.extend(def_generics.iter_id().skip(substs.len()).map(param_to_err));
+        }
+
+        assert_eq!(substs.len(), total_len, "expected {} substs, got {}", total_len, substs.len());
+        Substitution::from_iter(Interner, substs)
+    }
+
+    pub(crate) fn lower_trait_ref_from_resolved_path(
+        &mut self,
+        resolved: TraitId,
+        explicit_self_ty: Ty,
+    ) -> TraitRef {
+        let substs = self.trait_ref_substs_from_path(resolved, explicit_self_ty);
+        TraitRef { trait_id: to_chalk_trait_id(resolved), substitution: substs }
+    }
+
+    fn trait_ref_substs_from_path(
+        &mut self,
+        resolved: TraitId,
+        explicit_self_ty: Ty,
+    ) -> Substitution {
+        self.substs_from_path_segment(resolved.into(), false, Some(explicit_self_ty))
+    }
+
+    pub(super) fn assoc_type_bindings_from_type_bound<'c>(
+        mut self,
+        bound: &'c TypeBound,
+        trait_ref: TraitRef,
+    ) -> Option<impl Iterator<Item = QuantifiedWhereClause> + use<'a, 'b, 'c>> {
+        self.current_or_prev_segment.args_and_bindings.map(|args_and_bindings| {
+            args_and_bindings.bindings.iter().flat_map(move |binding| {
+                let found = associated_type_by_name_including_super_traits(
+                    self.ctx.db,
+                    trait_ref.clone(),
+                    &binding.name,
+                );
+                let (super_trait_ref, associated_ty) = match found {
+                    None => return SmallVec::new(),
+                    Some(t) => t,
+                };
+                // FIXME: `substs_from_path_segment()` pushes `TyKind::Error` for every parent
+                // generic params. It's inefficient to splice the `Substitution`s, so we may want
+                // that method to optionally take parent `Substitution` as we already know them at
+                // this point (`super_trait_ref.substitution`).
+                let substitution = self.substs_from_args_and_bindings(
+                    binding.args.as_ref(),
+                    associated_ty.into(),
+                    false, // this is not relevant
+                    Some(super_trait_ref.self_type_parameter(Interner)),
+                );
+                let self_params = generics(self.ctx.db.upcast(), associated_ty.into()).len_self();
+                let substitution = Substitution::from_iter(
+                    Interner,
+                    substitution
+                        .iter(Interner)
+                        .take(self_params)
+                        .chain(super_trait_ref.substitution.iter(Interner)),
+                );
+                let projection_ty = ProjectionTy {
+                    associated_ty_id: to_assoc_type_id(associated_ty),
+                    substitution,
+                };
+                let mut predicates: SmallVec<[_; 1]> = SmallVec::with_capacity(
+                    binding.type_ref.as_ref().map_or(0, |_| 1) + binding.bounds.len(),
+                );
+                if let Some(type_ref) = binding.type_ref {
+                    match (&self.ctx.types_map[type_ref], self.ctx.impl_trait_mode.mode) {
+                        (TypeRef::ImplTrait(_), ImplTraitLoweringMode::Disallowed) => (),
+                        (_, ImplTraitLoweringMode::Disallowed | ImplTraitLoweringMode::Opaque) => {
+                            let ty = self.ctx.lower_ty(type_ref);
+                            let alias_eq =
+                                AliasEq { alias: AliasTy::Projection(projection_ty.clone()), ty };
+                            predicates
+                                .push(crate::wrap_empty_binders(WhereClause::AliasEq(alias_eq)));
+                        }
+                        (_, ImplTraitLoweringMode::Param | ImplTraitLoweringMode::Variable) => {
+                            // Find the generic index for the target of our `bound`
+                            let target_param_idx =
+                                self.ctx.resolver.where_predicates_in_scope().find_map(|(p, _)| {
+                                    match p {
+                                        WherePredicate::TypeBound {
+                                            target: WherePredicateTypeTarget::TypeOrConstParam(idx),
+                                            bound: b,
+                                        } if b == bound => Some(idx),
+                                        _ => None,
+                                    }
+                                });
+                            let ty = if let Some(target_param_idx) = target_param_idx {
+                                let mut counter = 0;
+                                let generics = self.ctx.generics().expect("generics in scope");
+                                for (idx, data) in generics.iter_self_type_or_consts() {
+                                    // Count the number of `impl Trait` things that appear before
+                                    // the target of our `bound`.
+                                    // Our counter within `impl_trait_mode` should be that number
+                                    // to properly lower each types within `type_ref`
+                                    if data.type_param().is_some_and(|p| {
+                                        p.provenance == TypeParamProvenance::ArgumentImplTrait
+                                    }) {
+                                        counter += 1;
+                                    }
+                                    if idx == *target_param_idx {
+                                        break;
+                                    }
+                                }
+                                let mut ext = TyLoweringContext::new_maybe_unowned(
+                                    self.ctx.db,
+                                    self.ctx.resolver,
+                                    self.ctx.types_map,
+                                    self.ctx.types_source_map,
+                                    self.ctx.owner,
+                                )
+                                .with_type_param_mode(self.ctx.type_param_mode);
+                                match self.ctx.impl_trait_mode.mode {
+                                    ImplTraitLoweringMode::Param => {
+                                        ext.impl_trait_mode =
+                                            ImplTraitLoweringState::param(counter);
+                                    }
+                                    ImplTraitLoweringMode::Variable => {
+                                        ext.impl_trait_mode =
+                                            ImplTraitLoweringState::variable(counter);
+                                    }
+                                    _ => unreachable!(),
+                                }
+                                let ty = ext.lower_ty(type_ref);
+                                self.ctx.diagnostics.extend(ext.diagnostics);
+                                ty
+                            } else {
+                                self.ctx.lower_ty(type_ref)
+                            };
+
+                            let alias_eq =
+                                AliasEq { alias: AliasTy::Projection(projection_ty.clone()), ty };
+                            predicates
+                                .push(crate::wrap_empty_binders(WhereClause::AliasEq(alias_eq)));
+                        }
+                    }
+                }
+                for bound in binding.bounds.iter() {
+                    predicates.extend(self.ctx.lower_type_bound(
+                        bound,
+                        TyKind::Alias(AliasTy::Projection(projection_ty.clone())).intern(Interner),
+                        false,
+                    ));
+                }
+                predicates
+            })
+        })
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs
index 84d8950b1aa2f..41304bbd8a919 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs
@@ -10,7 +10,7 @@ use crate::{
     lang_items::is_box,
     mapping::ToChalk,
     CallableDefId, ClosureId, Const, ConstScalar, InferenceResult, Interner, MemoryMap,
-    Substitution, TraitEnvironment, Ty, TyKind,
+    Substitution, TraitEnvironment, Ty, TyExt, TyKind,
 };
 use base_db::CrateId;
 use chalk_ir::Mutability;
@@ -144,6 +144,13 @@ impl<V, T> ProjectionElem<V, T> {
         closure_field: impl FnOnce(ClosureId, &Substitution, usize) -> Ty,
         krate: CrateId,
     ) -> Ty {
+        // we only bail on mir building when there are type mismatches
+        // but error types may pop up resulting in us still attempting to build the mir
+        // so just propagate the error type
+        if base.is_unknown() {
+            return TyKind::Error.intern(Interner);
+        }
+
         if matches!(base.kind(Interner), TyKind::Alias(_) | TyKind::AssociatedType(..)) {
             base = normalize(
                 db,
@@ -166,7 +173,7 @@ impl<V, T> ProjectionElem<V, T> {
                     TyKind::Error.intern(Interner)
                 }
             },
-            ProjectionElem::Field(Either::Left(f)) => match &base.kind(Interner) {
+            ProjectionElem::Field(Either::Left(f)) => match base.kind(Interner) {
                 TyKind::Adt(_, subst) => {
                     db.field_types(f.parent)[f.local_id].clone().substitute(Interner, subst)
                 }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval/tests.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval/tests.rs
index f1e86daea233a..9625ae5f88ed9 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval/tests.rs
@@ -912,3 +912,36 @@ fn main() {
         "",
     );
 }
+
+#[test]
+fn regression_19021() {
+    check_pass(
+        r#"
+//- minicore: deref
+use core::ops::Deref;
+
+#[lang = "owned_box"]
+struct Box<T>(T);
+
+impl<T> Deref for Box<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+struct Foo;
+
+fn main() {
+    let x = Box(Foo);
+    let y = &Foo;
+
+    || match x {
+        ref x => x,
+        _ => y,
+    };
+}
+"#,
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs
index 549450e9bebd7..f88696692e6a7 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs
@@ -8,8 +8,8 @@ use hir_def::{
     data::adt::{StructKind, VariantData},
     expr_store::{Body, HygieneId},
     hir::{
-        ArithOp, Array, BinaryOp, BindingAnnotation, BindingId, ExprId, LabelId, Literal,
-        LiteralOrConst, MatchArm, Pat, PatId, RecordFieldPat, RecordLitField,
+        ArithOp, Array, BinaryOp, BindingAnnotation, BindingId, ExprId, LabelId, Literal, MatchArm,
+        Pat, PatId, RecordFieldPat, RecordLitField,
     },
     lang_item::{LangItem, LangItemTarget},
     path::Path,
@@ -1358,20 +1358,10 @@ impl<'ctx> MirLowerCtx<'ctx> {
         Ok(())
     }
 
-    fn lower_literal_or_const_to_operand(
-        &mut self,
-        ty: Ty,
-        loc: &LiteralOrConst,
-    ) -> Result<Operand> {
-        match loc {
-            LiteralOrConst::Literal(l) => self.lower_literal_to_operand(ty, l),
-            LiteralOrConst::Const(c) => {
-                let c = match &self.body.pats[*c] {
-                    Pat::Path(p) => p,
-                    _ => not_supported!(
-                        "only `char` and numeric types are allowed in range patterns"
-                    ),
-                };
+    fn lower_literal_or_const_to_operand(&mut self, ty: Ty, loc: &ExprId) -> Result<Operand> {
+        match &self.body.exprs[*loc] {
+            Expr::Literal(l) => self.lower_literal_to_operand(ty, l),
+            Expr::Path(c) => {
                 let edition = self.edition();
                 let unresolved_name =
                     || MirLowerError::unresolved_path(self.db, c, edition, &self.body.types);
@@ -1392,6 +1382,9 @@ impl<'ctx> MirLowerCtx<'ctx> {
                     }
                 }
             }
+            _ => {
+                not_supported!("only `char` and numeric types are allowed in range patterns");
+            }
         }
     }
 
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs
index 2ffea34c85a10..289175feefb18 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs
@@ -1,6 +1,6 @@
 //! MIR lowering for patterns
 
-use hir_def::{hir::LiteralOrConst, AssocItemId};
+use hir_def::{hir::ExprId, AssocItemId};
 
 use crate::{
     mir::{
@@ -207,7 +207,7 @@ impl MirLowerCtx<'_> {
                 )?
             }
             Pat::Range { start, end } => {
-                let mut add_check = |l: &LiteralOrConst, binop| -> Result<()> {
+                let mut add_check = |l: &ExprId, binop| -> Result<()> {
                     let lv =
                         self.lower_literal_or_const_to_operand(self.infer[pattern].clone(), l)?;
                     let else_target = *current_else.get_or_insert_with(|| self.new_basic_block());
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs
index 69ec35f406df4..f5a4d4ff35c36 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs
@@ -117,7 +117,7 @@ fn check_impl(
                     expected.trim_start_matches("adjustments:").trim().to_owned(),
                 );
             } else {
-                panic!("unexpected annotation: {expected}");
+                panic!("unexpected annotation: {expected} @ {range:?}");
             }
             had_annotations = true;
         }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs
index 7992f1feeeb1d..ef94814d58715 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/coercion.rs
@@ -185,11 +185,10 @@ fn test() {
     let t = &mut 1;
     let x = match 1 {
         1 => t as *mut i32,
+           //^^^^^^^^^^^^^ adjustments: Pointer(MutToConstPointer)
         2 => t as &i32,
            //^^^^^^^^^ expected *mut i32, got &'? i32
         _ => t as *const i32,
-          // ^^^^^^^^^^^^^^^ adjustments: Pointer(MutToConstPointer)
-
     };
     x;
   //^ type: *const i32
@@ -536,7 +535,7 @@ fn test() {
 
 #[test]
 fn coerce_unsize_generic() {
-    check(
+    check_no_mismatches(
         r#"
 //- minicore: coerce_unsized
 struct Foo<T> { t: T };
@@ -544,9 +543,7 @@ struct Bar<T>(Foo<T>);
 
 fn test() {
     let _: &Foo<[usize]> = &Foo { t: [1, 2, 3] };
-                         //^^^^^^^^^^^^^^^^^^^^^ expected &'? Foo<[usize]>, got &'? Foo<[i32; 3]>
     let _: &Bar<[usize]> = &Bar(Foo { t: [1, 2, 3] });
-                         //^^^^^^^^^^^^^^^^^^^^^^^^^^ expected &'? Bar<[usize]>, got &'? Bar<[i32; 3]>
 }
 "#,
     );
@@ -958,3 +955,24 @@ fn f() {
     "#,
     );
 }
+
+#[test]
+fn coerce_nested_unsized_struct() {
+    check_types(
+        r#"
+//- minicore: fn, coerce_unsized, dispatch_from_dyn, sized
+use core::marker::Unsize;
+
+struct Foo<T: ?Sized>(T);
+
+fn need(_: &Foo<dyn Fn(i32) -> i32>) {
+}
+
+fn test() {
+    let callback = |x| x;
+                  //^ i32
+    need(&Foo(callback));
+}
+"#,
+    )
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/diagnostics.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/diagnostics.rs
index def06f2d59d2a..855034117c0d7 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/diagnostics.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/diagnostics.rs
@@ -153,3 +153,53 @@ fn consume() -> Option<()> {
 "#,
     );
 }
+
+#[test]
+fn method_call_on_field() {
+    check(
+        r#"
+struct S {
+    field: fn(f32) -> u32,
+    field2: u32
+}
+
+fn main() {
+    let s = S { field: |_| 0, field2: 0 };
+    s.field(0);
+         // ^ expected f32, got i32
+ // ^^^^^^^^^^ type: u32
+    s.field2(0);
+          // ^ type: i32
+ // ^^^^^^^^^^^ type: {unknown}
+    s.not_a_field(0);
+               // ^ type: i32
+ // ^^^^^^^^^^^^^^^^ type: {unknown}
+}
+"#,
+    );
+}
+
+#[test]
+fn method_call_on_assoc() {
+    check(
+        r#"
+struct S;
+
+impl S {
+    fn not_a_method() -> f32 { 0.0 }
+    fn not_a_method2(this: Self, param: f32) -> Self { this }
+    fn not_a_method3(param: f32) -> Self { S }
+}
+
+fn main() {
+    S.not_a_method(0);
+ // ^^^^^^^^^^^^^^^^^ type: f32
+    S.not_a_method2(0);
+                 // ^ expected f32, got i32
+ // ^^^^^^^^^^^^^^^^^^ type: S
+    S.not_a_method3(0);
+ // ^^^^^^^^^^^^^^^^^^ type: S
+}
+"#,
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs
index e5f791ea6ffcd..3a258ecad10a6 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/method_resolution.rs
@@ -1210,7 +1210,7 @@ impl<T> Slice<T> {
 fn main() {
     let foo: Slice<u32>;
     foo.into_vec(); // we shouldn't crash on this at least
-} //^^^^^^^^^^^^^^ {unknown}
+} //^^^^^^^^^^^^^^ ()
 "#,
     );
 }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs
index dda7bfb2baf9a..f0eb41b1ce723 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests/traits.rs
@@ -4694,21 +4694,21 @@ fn f<T: Send, U>() {
     Struct::<T>::IS_SEND;
   //^^^^^^^^^^^^^^^^^^^^Yes
     Struct::<U>::IS_SEND;
-  //^^^^^^^^^^^^^^^^^^^^Yes
+  //^^^^^^^^^^^^^^^^^^^^{unknown}
     Struct::<*const T>::IS_SEND;
-  //^^^^^^^^^^^^^^^^^^^^^^^^^^^Yes
+  //^^^^^^^^^^^^^^^^^^^^^^^^^^^{unknown}
     Enum::<T>::IS_SEND;
   //^^^^^^^^^^^^^^^^^^Yes
     Enum::<U>::IS_SEND;
-  //^^^^^^^^^^^^^^^^^^Yes
+  //^^^^^^^^^^^^^^^^^^{unknown}
     Enum::<*const T>::IS_SEND;
-  //^^^^^^^^^^^^^^^^^^^^^^^^^Yes
+  //^^^^^^^^^^^^^^^^^^^^^^^^^{unknown}
     Union::<T>::IS_SEND;
   //^^^^^^^^^^^^^^^^^^^Yes
     Union::<U>::IS_SEND;
-  //^^^^^^^^^^^^^^^^^^^Yes
+  //^^^^^^^^^^^^^^^^^^^{unknown}
     Union::<*const T>::IS_SEND;
-  //^^^^^^^^^^^^^^^^^^^^^^^^^^Yes
+  //^^^^^^^^^^^^^^^^^^^^^^^^^^{unknown}
     PhantomData::<T>::IS_SEND;
   //^^^^^^^^^^^^^^^^^^^^^^^^^Yes
     PhantomData::<U>::IS_SEND;
diff --git a/src/tools/rust-analyzer/crates/hir/src/diagnostics.rs b/src/tools/rust-analyzer/crates/hir/src/diagnostics.rs
index 64e982c42d7f6..1ed0daa375630 100644
--- a/src/tools/rust-analyzer/crates/hir/src/diagnostics.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/diagnostics.rs
@@ -6,10 +6,11 @@
 use cfg::{CfgExpr, CfgOptions};
 use either::Either;
 use hir_def::{
+    expr_store::ExprOrPatPtr,
     hir::ExprOrPatId,
     path::{hir_segment_to_ast_segment, ModPath},
     type_ref::TypesSourceMap,
-    AssocItemId, DefWithBodyId, SyntheticSyntax,
+    DefWithBodyId, SyntheticSyntax,
 };
 use hir_expand::{name::Name, HirFileId, InFile};
 use hir_ty::{
@@ -24,7 +25,7 @@ use syntax::{
 };
 use triomphe::Arc;
 
-use crate::{AssocItem, Field, Local, Trait, Type};
+use crate::{AssocItem, Field, Function, Local, Trait, Type};
 
 pub use hir_def::VariantId;
 pub use hir_ty::{
@@ -111,18 +112,19 @@ diagnostics![
     UnusedMut,
     UnusedVariable,
     GenericArgsProhibited,
+    ParenthesizedGenericArgsWithoutFnTrait,
 ];
 
 #[derive(Debug)]
 pub struct BreakOutsideOfLoop {
-    pub expr: InFile<AstPtr<ast::Expr>>,
+    pub expr: InFile<ExprOrPatPtr>,
     pub is_break: bool,
     pub bad_value_break: bool,
 }
 
 #[derive(Debug)]
 pub struct TypedHole {
-    pub expr: InFile<AstPtr<ast::Expr>>,
+    pub expr: InFile<ExprOrPatPtr>,
     pub expected: Type,
 }
 
@@ -221,26 +223,26 @@ pub struct NoSuchField {
 
 #[derive(Debug)]
 pub struct PrivateAssocItem {
-    pub expr_or_pat: InFile<AstPtr<Either<ast::Expr, ast::Pat>>>,
+    pub expr_or_pat: InFile<ExprOrPatPtr>,
     pub item: AssocItem,
 }
 
 #[derive(Debug)]
 pub struct MismatchedTupleStructPatArgCount {
-    pub expr_or_pat: InFile<AstPtr<Either<ast::Expr, ast::Pat>>>,
+    pub expr_or_pat: InFile<ExprOrPatPtr>,
     pub expected: usize,
     pub found: usize,
 }
 
 #[derive(Debug)]
 pub struct ExpectedFunction {
-    pub call: InFile<AstPtr<ast::Expr>>,
+    pub call: InFile<ExprOrPatPtr>,
     pub found: Type,
 }
 
 #[derive(Debug)]
 pub struct UnresolvedField {
-    pub expr: InFile<AstPtr<ast::Expr>>,
+    pub expr: InFile<ExprOrPatPtr>,
     pub receiver: Type,
     pub name: Name,
     pub method_with_same_name_exists: bool,
@@ -248,26 +250,26 @@ pub struct UnresolvedField {
 
 #[derive(Debug)]
 pub struct UnresolvedMethodCall {
-    pub expr: InFile<AstPtr<ast::Expr>>,
+    pub expr: InFile<ExprOrPatPtr>,
     pub receiver: Type,
     pub name: Name,
     pub field_with_same_name: Option<Type>,
-    pub assoc_func_with_same_name: Option<AssocItemId>,
+    pub assoc_func_with_same_name: Option<Function>,
 }
 
 #[derive(Debug)]
 pub struct UnresolvedAssocItem {
-    pub expr_or_pat: InFile<AstPtr<Either<ast::Expr, ast::Pat>>>,
+    pub expr_or_pat: InFile<ExprOrPatPtr>,
 }
 
 #[derive(Debug)]
 pub struct UnresolvedIdent {
-    pub node: InFile<(AstPtr<Either<ast::Expr, ast::Pat>>, Option<TextRange>)>,
+    pub node: InFile<(ExprOrPatPtr, Option<TextRange>)>,
 }
 
 #[derive(Debug)]
 pub struct PrivateField {
-    pub expr: InFile<AstPtr<ast::Expr>>,
+    pub expr: InFile<ExprOrPatPtr>,
     pub field: Field,
 }
 
@@ -280,7 +282,7 @@ pub enum UnsafeLint {
 
 #[derive(Debug)]
 pub struct MissingUnsafe {
-    pub node: InFile<AstPtr<Either<ast::Expr, ast::Pat>>>,
+    pub node: InFile<ExprOrPatPtr>,
     pub lint: UnsafeLint,
     pub reason: UnsafetyReason,
 }
@@ -302,7 +304,7 @@ pub struct ReplaceFilterMapNextWithFindMap {
 
 #[derive(Debug)]
 pub struct MismatchedArgCount {
-    pub call_expr: InFile<AstPtr<ast::Expr>>,
+    pub call_expr: InFile<ExprOrPatPtr>,
     pub expected: usize,
     pub found: usize,
 }
@@ -321,7 +323,7 @@ pub struct NonExhaustiveLet {
 
 #[derive(Debug)]
 pub struct TypeMismatch {
-    pub expr_or_pat: InFile<AstPtr<Either<ast::Expr, ast::Pat>>>,
+    pub expr_or_pat: InFile<ExprOrPatPtr>,
     pub expected: Type,
     pub actual: Type,
 }
@@ -395,13 +397,13 @@ pub struct RemoveUnnecessaryElse {
 
 #[derive(Debug)]
 pub struct CastToUnsized {
-    pub expr: InFile<AstPtr<ast::Expr>>,
+    pub expr: InFile<ExprOrPatPtr>,
     pub cast_ty: Type,
 }
 
 #[derive(Debug)]
 pub struct InvalidCast {
-    pub expr: InFile<AstPtr<ast::Expr>>,
+    pub expr: InFile<ExprOrPatPtr>,
     pub error: CastError,
     pub expr_ty: Type,
     pub cast_ty: Type,
@@ -413,6 +415,11 @@ pub struct GenericArgsProhibited {
     pub reason: GenericArgsProhibitedReason,
 }
 
+#[derive(Debug)]
+pub struct ParenthesizedGenericArgsWithoutFnTrait {
+    pub args: InFile<AstPtr<ast::ParenthesizedArgList>>,
+}
+
 impl AnyDiagnostic {
     pub(crate) fn body_validation_diagnostic(
         db: &dyn HirDatabase,
@@ -428,9 +435,7 @@ impl AnyDiagnostic {
                     .collect();
 
                 let record = match record {
-                    Either::Left(record_expr) => {
-                        source_map.expr_syntax(record_expr).ok()?.map(AstPtr::wrap_left)
-                    }
+                    Either::Left(record_expr) => source_map.expr_syntax(record_expr).ok()?,
                     Either::Right(record_pat) => source_map.pat_syntax(record_pat).ok()?,
                 };
                 let file = record.file_id;
@@ -474,7 +479,7 @@ impl AnyDiagnostic {
                     return Some(
                         ReplaceFilterMapNextWithFindMap {
                             file: next_source_ptr.file_id,
-                            next_expr: next_source_ptr.value,
+                            next_expr: next_source_ptr.value.cast()?,
                         }
                         .into(),
                     );
@@ -484,7 +489,9 @@ impl AnyDiagnostic {
                 match source_map.expr_syntax(match_expr) {
                     Ok(source_ptr) => {
                         let root = source_ptr.file_syntax(db.upcast());
-                        if let ast::Expr::MatchExpr(match_expr) = &source_ptr.value.to_node(&root) {
+                        if let Either::Left(ast::Expr::MatchExpr(match_expr)) =
+                            &source_ptr.value.to_node(&root)
+                        {
                             match match_expr.expr() {
                                 Some(scrut_expr) if match_expr.match_arm_list().is_some() => {
                                     return Some(
@@ -561,7 +568,7 @@ impl AnyDiagnostic {
         let pat_syntax =
             |pat| source_map.pat_syntax(pat).inspect_err(|_| stdx::never!("synthetic syntax")).ok();
         let expr_or_pat_syntax = |id| match id {
-            ExprOrPatId::ExprId(expr) => expr_syntax(expr).map(|it| it.map(AstPtr::wrap_left)),
+            ExprOrPatId::ExprId(expr) => expr_syntax(expr),
             ExprOrPatId::PatId(pat) => pat_syntax(pat),
         };
         Some(match d {
@@ -622,7 +629,7 @@ impl AnyDiagnostic {
                     field_with_same_name: field_with_same_name
                         .clone()
                         .map(|ty| Type::new(db, def, ty)),
-                    assoc_func_with_same_name: *assoc_func_with_same_name,
+                    assoc_func_with_same_name: assoc_func_with_same_name.map(Into::into),
                 }
                 .into()
             }
@@ -633,7 +640,7 @@ impl AnyDiagnostic {
             &InferenceDiagnostic::UnresolvedIdent { id } => {
                 let node = match id {
                     ExprOrPatId::ExprId(id) => match source_map.expr_syntax(id) {
-                        Ok(syntax) => syntax.map(|it| (it.wrap_left(), None)),
+                        Ok(syntax) => syntax.map(|it| (it, None)),
                         Err(SyntheticSyntax) => source_map
                             .format_args_implicit_capture(id)?
                             .map(|(node, range)| (node.wrap_left(), Some(range))),
@@ -652,7 +659,7 @@ impl AnyDiagnostic {
             }
             &InferenceDiagnostic::MismatchedTupleStructPatArgCount { pat, expected, found } => {
                 let expr_or_pat = match pat {
-                    ExprOrPatId::ExprId(expr) => expr_syntax(expr)?.map(AstPtr::wrap_left),
+                    ExprOrPatId::ExprId(expr) => expr_syntax(expr)?,
                     ExprOrPatId::PatId(pat) => {
                         let InFile { file_id, value } = pat_syntax(pat)?;
 
@@ -702,8 +709,8 @@ impl AnyDiagnostic {
         diag: &PathLoweringDiagnostic,
         path: InFile<ast::Path>,
     ) -> Option<AnyDiagnostic> {
-        Some(match diag {
-            &PathLoweringDiagnostic::GenericArgsProhibited { segment, reason } => {
+        Some(match *diag {
+            PathLoweringDiagnostic::GenericArgsProhibited { segment, reason } => {
                 let segment = hir_segment_to_ast_segment(&path.value, segment)?;
                 let args = if let Some(generics) = segment.generic_arg_list() {
                     AstPtr::new(&generics).wrap_left()
@@ -713,6 +720,12 @@ impl AnyDiagnostic {
                 let args = path.with_value(args);
                 GenericArgsProhibited { args, reason }.into()
             }
+            PathLoweringDiagnostic::ParenthesizedGenericArgsWithoutFnTrait { segment } => {
+                let segment = hir_segment_to_ast_segment(&path.value, segment)?;
+                let args = AstPtr::new(&segment.parenthesized_arg_list()?);
+                let args = path.with_value(args);
+                ParenthesizedGenericArgsWithoutFnTrait { args }.into()
+            }
         })
     }
 
diff --git a/src/tools/rust-analyzer/crates/hir/src/from_id.rs b/src/tools/rust-analyzer/crates/hir/src/from_id.rs
index 537401afdc34a..72df07ef8c0cc 100644
--- a/src/tools/rust-analyzer/crates/hir/src/from_id.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/from_id.rs
@@ -49,6 +49,7 @@ from_id![
     (hir_def::LifetimeParamId, crate::LifetimeParam),
     (hir_def::MacroId, crate::Macro),
     (hir_def::ExternCrateId, crate::ExternCrateDecl),
+    (hir_def::ExternBlockId, crate::ExternBlock),
 ];
 
 impl From<AdtId> for Adt {
diff --git a/src/tools/rust-analyzer/crates/hir/src/has_source.rs b/src/tools/rust-analyzer/crates/hir/src/has_source.rs
index 82c90ac30101b..a34b4980832c8 100644
--- a/src/tools/rust-analyzer/crates/hir/src/has_source.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/has_source.rs
@@ -248,7 +248,7 @@ impl HasSource for Param {
                 let ast @ InFile { file_id, value } = source_map.expr_syntax(expr_id).ok()?;
                 let root = db.parse_or_expand(file_id);
                 match value.to_node(&root) {
-                    ast::Expr::ClosureExpr(it) => it
+                    Either::Left(ast::Expr::ClosureExpr(it)) => it
                         .param_list()?
                         .params()
                         .nth(self.idx)
@@ -301,7 +301,7 @@ impl HasSource for InlineAsmOperand {
             let root = src.file_syntax(db.upcast());
             return src
                 .map(|ast| match ast.to_node(&root) {
-                    ast::Expr::AsmExpr(asm) => asm
+                    Either::Left(ast::Expr::AsmExpr(asm)) => asm
                         .asm_pieces()
                         .filter_map(|it| match it {
                             ast::AsmPiece::AsmOperandNamed(it) => Some(it),
diff --git a/src/tools/rust-analyzer/crates/hir/src/lib.rs b/src/tools/rust-analyzer/crates/hir/src/lib.rs
index 56090bc6b6057..5923a1bc30ea7 100644
--- a/src/tools/rust-analyzer/crates/hir/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/lib.rs
@@ -55,8 +55,8 @@ use hir_def::{
     resolver::{HasResolver, Resolver},
     type_ref::TypesSourceMap,
     AdtId, AssocItemId, AssocItemLoc, AttrDefId, CallableDefId, ConstId, ConstParamId,
-    CrateRootModuleId, DefWithBodyId, EnumId, EnumVariantId, ExternCrateId, FunctionId,
-    GenericDefId, GenericParamId, HasModule, ImplId, InTypeConstId, ItemContainerId,
+    CrateRootModuleId, DefWithBodyId, EnumId, EnumVariantId, ExternBlockId, ExternCrateId,
+    FunctionId, GenericDefId, GenericParamId, HasModule, ImplId, InTypeConstId, ItemContainerId,
     LifetimeParamId, LocalFieldId, Lookup, MacroExpander, MacroId, ModuleId, StaticId, StructId,
     SyntheticSyntax, TraitAliasId, TupleId, TypeAliasId, TypeOrConstParamId, TypeParamId, UnionId,
 };
@@ -1957,7 +1957,7 @@ impl DefWithBody {
                 ExprOrPatId::PatId(pat) => source_map.pat_syntax(pat).map(Either::Right),
             };
             let expr_or_pat = match expr_or_pat {
-                Ok(Either::Left(expr)) => expr.map(AstPtr::wrap_left),
+                Ok(Either::Left(expr)) => expr,
                 Ok(Either::Right(InFile { file_id, value: pat })) => {
                     // cast from Either<Pat, SelfParam> -> Either<_, Pat>
                     let Some(ptr) = AstPtr::try_from_raw(pat.syntax_node_ptr()) else {
@@ -2003,7 +2003,7 @@ impl DefWithBody {
             match source_map.expr_syntax(node) {
                 Ok(node) => acc.push(
                     MissingUnsafe {
-                        node: node.map(|it| it.wrap_left()),
+                        node,
                         lint: UnsafeLint::DeprecatedSafe2024,
                         reason: UnsafetyReason::UnsafeFnCall,
                     }
@@ -2327,6 +2327,13 @@ impl Function {
         db.function_data(self.id).is_async()
     }
 
+    pub fn extern_block(self, db: &dyn HirDatabase) -> Option<ExternBlock> {
+        match self.id.lookup(db.upcast()).container {
+            ItemContainerId::ExternBlockId(id) => Some(ExternBlock { id }),
+            _ => None,
+        }
+    }
+
     pub fn returns_impl_future(self, db: &dyn HirDatabase) -> bool {
         if self.is_async(db) {
             return true;
@@ -2761,6 +2768,13 @@ impl Static {
         Type::from_value_def(db, self.id)
     }
 
+    pub fn extern_block(self, db: &dyn HirDatabase) -> Option<ExternBlock> {
+        match self.id.lookup(db.upcast()).container {
+            ItemContainerId::ExternBlockId(id) => Some(ExternBlock { id }),
+            _ => None,
+        }
+    }
+
     /// Evaluate the static initializer.
     pub fn eval(self, db: &dyn HirDatabase) -> Result<EvaluatedConst, ConstEvalError> {
         db.const_eval(self.id.into(), Substitution::empty(Interner), None)
@@ -2928,6 +2942,17 @@ impl HasVisibility for TypeAlias {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct ExternBlock {
+    pub(crate) id: ExternBlockId,
+}
+
+impl ExternBlock {
+    pub fn module(self, db: &dyn HirDatabase) -> Module {
+        Module { id: self.id.module(db.upcast()) }
+    }
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct StaticLifetime;
 
@@ -4592,10 +4617,7 @@ impl CaptureUsages {
             match span {
                 mir::MirSpan::ExprId(expr) => {
                     if let Ok(expr) = source_map.expr_syntax(expr) {
-                        result.push(CaptureUsageSource {
-                            is_ref,
-                            source: expr.map(AstPtr::wrap_left),
-                        })
+                        result.push(CaptureUsageSource { is_ref, source: expr })
                     }
                 }
                 mir::MirSpan::PatId(pat) => {
@@ -6180,9 +6202,15 @@ impl HasContainer for TraitAlias {
     }
 }
 
+impl HasContainer for ExternBlock {
+    fn container(&self, db: &dyn HirDatabase) -> ItemContainer {
+        ItemContainer::Module(Module { id: self.id.lookup(db.upcast()).container })
+    }
+}
+
 fn container_id_to_hir(c: ItemContainerId) -> ItemContainer {
     match c {
-        ItemContainerId::ExternBlockId(_id) => ItemContainer::ExternBlock(),
+        ItemContainerId::ExternBlockId(id) => ItemContainer::ExternBlock(ExternBlock { id }),
         ItemContainerId::ModuleId(id) => ItemContainer::Module(Module { id }),
         ItemContainerId::ImplId(id) => ItemContainer::Impl(Impl { id }),
         ItemContainerId::TraitId(id) => ItemContainer::Trait(Trait { id }),
@@ -6194,7 +6222,7 @@ pub enum ItemContainer {
     Trait(Trait),
     Impl(Impl),
     Module(Module),
-    ExternBlock(),
+    ExternBlock(ExternBlock),
     Crate(CrateId),
 }
 
diff --git a/src/tools/rust-analyzer/crates/hir/src/semantics.rs b/src/tools/rust-analyzer/crates/hir/src/semantics.rs
index 882a27182f015..c9145f7d212d7 100644
--- a/src/tools/rust-analyzer/crates/hir/src/semantics.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/semantics.rs
@@ -1998,6 +1998,7 @@ to_def_impls![
     (crate::Adt, ast::Adt, adt_to_def),
     (crate::ExternCrateDecl, ast::ExternCrate, extern_crate_to_def),
     (crate::InlineAsmOperand, ast::AsmOperandNamed, asm_operand_to_def),
+    (crate::ExternBlock, ast::ExternBlock, extern_block_to_def),
     (MacroCallId, ast::MacroCall, macro_call_to_macro_call),
 ];
 
diff --git a/src/tools/rust-analyzer/crates/hir/src/semantics/child_by_source.rs b/src/tools/rust-analyzer/crates/hir/src/semantics/child_by_source.rs
index d5dfb98571864..d0fdf5cbdf7a3 100644
--- a/src/tools/rust-analyzer/crates/hir/src/semantics/child_by_source.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/semantics/child_by_source.rs
@@ -74,6 +74,9 @@ impl ChildBySource for ItemScope {
     fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId) {
         self.declarations().for_each(|item| add_module_def(db, res, file_id, item));
         self.impls().for_each(|imp| insert_item_loc(db, res, file_id, imp, keys::IMPL));
+        self.extern_blocks().for_each(|extern_block| {
+            insert_item_loc(db, res, file_id, extern_block, keys::EXTERN_BLOCK)
+        });
         self.extern_crate_decls()
             .for_each(|ext| insert_item_loc(db, res, file_id, ext, keys::EXTERN_CRATE));
         self.use_decls().for_each(|ext| insert_item_loc(db, res, file_id, ext, keys::USE));
diff --git a/src/tools/rust-analyzer/crates/hir/src/semantics/source_to_def.rs b/src/tools/rust-analyzer/crates/hir/src/semantics/source_to_def.rs
index 3c9e7065c41df..4481b8855fd67 100644
--- a/src/tools/rust-analyzer/crates/hir/src/semantics/source_to_def.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/semantics/source_to_def.rs
@@ -92,10 +92,10 @@ use hir_def::{
         DynMap,
     },
     hir::{BindingId, Expr, LabelId},
-    AdtId, BlockId, ConstId, ConstParamId, DefWithBodyId, EnumId, EnumVariantId, ExternCrateId,
-    FieldId, FunctionId, GenericDefId, GenericParamId, ImplId, LifetimeParamId, Lookup, MacroId,
-    ModuleId, StaticId, StructId, TraitAliasId, TraitId, TypeAliasId, TypeParamId, UnionId, UseId,
-    VariantId,
+    AdtId, BlockId, ConstId, ConstParamId, DefWithBodyId, EnumId, EnumVariantId, ExternBlockId,
+    ExternCrateId, FieldId, FunctionId, GenericDefId, GenericParamId, ImplId, LifetimeParamId,
+    Lookup, MacroId, ModuleId, StaticId, StructId, TraitAliasId, TraitId, TypeAliasId, TypeParamId,
+    UnionId, UseId, VariantId,
 };
 use hir_expand::{
     attrs::AttrId, name::AsName, ExpansionInfo, HirFileId, HirFileIdExt, InMacroFile, MacroCallId,
@@ -308,6 +308,12 @@ impl SourceToDefCtx<'_, '_> {
     ) -> Option<ExternCrateId> {
         self.to_def(src, keys::EXTERN_CRATE)
     }
+    pub(super) fn extern_block_to_def(
+        &mut self,
+        src: InFile<&ast::ExternBlock>,
+    ) -> Option<ExternBlockId> {
+        self.to_def(src, keys::EXTERN_BLOCK)
+    }
     #[allow(dead_code)]
     pub(super) fn use_to_def(&mut self, src: InFile<&ast::Use>) -> Option<UseId> {
         self.to_def(src, keys::USE)
@@ -352,7 +358,7 @@ impl SourceToDefCtx<'_, '_> {
         let src = src.cloned().map(ast::Pat::from);
         let pat_id = source_map.node_pat(src.as_ref())?;
         // the pattern could resolve to a constant, verify that this is not the case
-        if let crate::Pat::Bind { id, .. } = body[pat_id] {
+        if let crate::Pat::Bind { id, .. } = body[pat_id.as_pat()?] {
             Some((container, id))
         } else {
             None
diff --git a/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs b/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
index 23e7518883b56..9019863f7fdee 100644
--- a/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
@@ -18,7 +18,7 @@ use hir_def::{
         scope::{ExprScopes, ScopeId},
         Body, BodySourceMap, HygieneId,
     },
-    hir::{BindingId, Expr, ExprId, ExprOrPatId, Pat, PatId},
+    hir::{BindingId, Expr, ExprId, ExprOrPatId, Pat},
     lang_item::LangItem,
     lower::LowerCtx,
     nameres::MacroSubNs,
@@ -139,7 +139,7 @@ impl SourceAnalyzer {
         sm.node_expr(src.as_ref())
     }
 
-    fn pat_id(&self, pat: &ast::Pat) -> Option<PatId> {
+    fn pat_id(&self, pat: &ast::Pat) -> Option<ExprOrPatId> {
         // FIXME: macros, see `expr_id`
         let src = InFile { file_id: self.file_id, value: pat };
         self.body_source_map()?.node_pat(src)
@@ -147,7 +147,7 @@ impl SourceAnalyzer {
 
     fn binding_id_of_pat(&self, pat: &ast::IdentPat) -> Option<BindingId> {
         let pat_id = self.pat_id(&pat.clone().into())?;
-        if let Pat::Bind { id, .. } = self.body()?.pats[pat_id] {
+        if let Pat::Bind { id, .. } = self.body()?.pats[pat_id.as_pat()?] {
             Some(id)
         } else {
             None
@@ -210,11 +210,20 @@ impl SourceAnalyzer {
         db: &dyn HirDatabase,
         pat: &ast::Pat,
     ) -> Option<(Type, Option<Type>)> {
-        let pat_id = self.pat_id(pat)?;
+        let expr_or_pat_id = self.pat_id(pat)?;
         let infer = self.infer.as_ref()?;
-        let coerced =
-            infer.pat_adjustments.get(&pat_id).and_then(|adjusts| adjusts.last().cloned());
-        let ty = infer[pat_id].clone();
+        let coerced = match expr_or_pat_id {
+            ExprOrPatId::ExprId(idx) => infer
+                .expr_adjustments
+                .get(&idx)
+                .and_then(|adjusts| adjusts.last().cloned())
+                .map(|adjust| adjust.target),
+            ExprOrPatId::PatId(idx) => {
+                infer.pat_adjustments.get(&idx).and_then(|adjusts| adjusts.last().cloned())
+            }
+        };
+
+        let ty = infer[expr_or_pat_id].clone();
         let mk_ty = |ty| Type::new_with_resolver(db, &self.resolver, ty);
         Some((mk_ty(ty), coerced.map(mk_ty)))
     }
@@ -248,7 +257,7 @@ impl SourceAnalyzer {
     ) -> Option<BindingMode> {
         let id = self.pat_id(&pat.clone().into())?;
         let infer = self.infer.as_ref()?;
-        infer.binding_modes.get(id).map(|bm| match bm {
+        infer.binding_modes.get(id.as_pat()?).map(|bm| match bm {
             hir_ty::BindingMode::Move => BindingMode::Move,
             hir_ty::BindingMode::Ref(hir_ty::Mutability::Mut) => BindingMode::Ref(Mutability::Mut),
             hir_ty::BindingMode::Ref(hir_ty::Mutability::Not) => {
@@ -266,7 +275,7 @@ impl SourceAnalyzer {
         Some(
             infer
                 .pat_adjustments
-                .get(&pat_id)?
+                .get(&pat_id.as_pat()?)?
                 .iter()
                 .map(|ty| Type::new_with_resolver(db, &self.resolver, ty.clone()))
                 .collect(),
@@ -649,10 +658,10 @@ impl SourceAnalyzer {
         let field_name = field.field_name()?.as_name();
         let record_pat = ast::RecordPat::cast(field.syntax().parent().and_then(|p| p.parent())?)?;
         let pat_id = self.pat_id(&record_pat.into())?;
-        let variant = self.infer.as_ref()?.variant_resolution_for_pat(pat_id)?;
+        let variant = self.infer.as_ref()?.variant_resolution_for_pat(pat_id.as_pat()?)?;
         let variant_data = variant.variant_data(db.upcast());
         let field = FieldId { parent: variant, local_id: variant_data.field(&field_name)? };
-        let (adt, subst) = self.infer.as_ref()?.type_of_pat.get(pat_id)?.as_adt()?;
+        let (adt, subst) = self.infer.as_ref()?.type_of_pat.get(pat_id.as_pat()?)?.as_adt()?;
         let field_ty =
             db.field_types(variant).get(field.local_id)?.clone().substitute(Interner, subst);
         Some((
@@ -682,12 +691,20 @@ impl SourceAnalyzer {
         db: &dyn HirDatabase,
         pat: &ast::IdentPat,
     ) -> Option<ModuleDef> {
-        let pat_id = self.pat_id(&pat.clone().into())?;
+        let expr_or_pat_id = self.pat_id(&pat.clone().into())?;
         let body = self.body()?;
-        let path = match &body[pat_id] {
-            Pat::Path(path) => path,
-            _ => return None,
+
+        let path = match expr_or_pat_id {
+            ExprOrPatId::ExprId(idx) => match &body[idx] {
+                Expr::Path(path) => path,
+                _ => return None,
+            },
+            ExprOrPatId::PatId(idx) => match &body[idx] {
+                Pat::Path(path) => path,
+                _ => return None,
+            },
         };
+
         let res = resolve_hir_path(db, &self.resolver, path, HygieneId::ROOT, TypesMap::EMPTY)?;
         match res {
             PathResolution::Def(def) => Some(def),
@@ -782,8 +799,9 @@ impl SourceAnalyzer {
                 }
                 prefer_value_ns = true;
             } else if let Some(path_pat) = parent().and_then(ast::PathPat::cast) {
-                let pat_id = self.pat_id(&path_pat.into())?;
-                if let Some((assoc, subs)) = infer.assoc_resolutions_for_pat(pat_id) {
+                let expr_or_pat_id = self.pat_id(&path_pat.into())?;
+                if let Some((assoc, subs)) = infer.assoc_resolutions_for_expr_or_pat(expr_or_pat_id)
+                {
                     let (assoc, subst) = match assoc {
                         AssocItemId::ConstId(const_id) => {
                             let (konst, subst) =
@@ -807,7 +825,7 @@ impl SourceAnalyzer {
                     return Some((PathResolution::Def(AssocItem::from(assoc).into()), Some(subst)));
                 }
                 if let Some(VariantId::EnumVariantId(variant)) =
-                    infer.variant_resolution_for_pat(pat_id)
+                    infer.variant_resolution_for_expr_or_pat(expr_or_pat_id)
                 {
                     return Some((PathResolution::Def(ModuleDef::Variant(variant.into())), None));
                 }
@@ -824,7 +842,7 @@ impl SourceAnalyzer {
                     || parent().and_then(ast::TupleStructPat::cast).map(ast::Pat::from);
                 if let Some(pat) = record_pat.or_else(tuple_struct_pat) {
                     let pat_id = self.pat_id(&pat)?;
-                    let variant_res_for_pat = infer.variant_resolution_for_pat(pat_id);
+                    let variant_res_for_pat = infer.variant_resolution_for_pat(pat_id.as_pat()?);
                     if let Some(VariantId::EnumVariantId(variant)) = variant_res_for_pat {
                         return Some((
                             PathResolution::Def(ModuleDef::Variant(variant.into())),
@@ -866,7 +884,8 @@ impl SourceAnalyzer {
 
         // Case where path is a qualifier of another path, e.g. foo::bar::Baz where we are
         // trying to resolve foo::bar.
-        if path.parent_path().is_some() {
+        if let Some(parent_path) = path.parent_path() {
+            let parent_hir_path = Path::from_src(&mut ctx, parent_path);
             return match resolve_hir_path_qualifier(db, &self.resolver, &hir_path, &types_map) {
                 None if meta_path.is_some() => path
                     .first_segment()
@@ -876,6 +895,42 @@ impl SourceAnalyzer {
                             .map(PathResolution::ToolModule)
                     })
                     .map(|it| (it, None)),
+                // Case the type name conflict with use module,
+                // e.g.
+                // ```
+                // use std::str;
+                // fn main() {
+                //     str::from_utf8();  // as module std::str
+                //     str::len();        // as primitive type str
+                //     str::no_exist_item(); // as primitive type str
+                // }
+                // ```
+                Some(it) if matches!(it, PathResolution::Def(ModuleDef::BuiltinType(_))) => {
+                    if let (Some(mod_path), Some(parent_hir_path)) =
+                        (hir_path.mod_path(), parent_hir_path)
+                    {
+                        if let Some(ModuleDefId::ModuleId(id)) = self
+                            .resolver
+                            .resolve_module_path_in_items(db.upcast(), mod_path)
+                            .take_types()
+                        {
+                            let parent_hir_name =
+                                parent_hir_path.segments().get(1).map(|it| it.name);
+                            let module = crate::Module { id };
+                            if module
+                                .scope(db, None)
+                                .into_iter()
+                                .any(|(name, _)| Some(&name) == parent_hir_name)
+                            {
+                                return Some((
+                                    PathResolution::Def(ModuleDef::Module(module)),
+                                    None,
+                                ));
+                            };
+                        }
+                    }
+                    Some((it, None))
+                }
                 // FIXME: We do not show substitutions for parts of path, because this is really complex
                 // due to the interactions with associated items of `impl`s and associated items of associated
                 // types.
@@ -1043,7 +1098,7 @@ impl SourceAnalyzer {
         let body = self.body()?;
         let infer = self.infer.as_ref()?;
 
-        let pat_id = self.pat_id(&pattern.clone().into())?;
+        let pat_id = self.pat_id(&pattern.clone().into())?.as_pat()?;
         let substs = infer.type_of_pat[pat_id].as_adt()?.1;
 
         let (variant, missing_fields, _exhaustive) =
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_match_arms.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_match_arms.rs
index 5899ec5a00584..4a9e2256e9b0d 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_match_arms.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/add_missing_match_arms.rs
@@ -6,7 +6,9 @@ use ide_db::syntax_helpers::suggest_name;
 use ide_db::RootDatabase;
 use ide_db::{famous_defs::FamousDefs, helpers::mod_path_to_ast};
 use itertools::Itertools;
-use syntax::ast::edit_in_place::Removable;
+use syntax::ast::edit::IndentLevel;
+use syntax::ast::edit_in_place::Indent;
+use syntax::ast::syntax_factory::SyntaxFactory;
 use syntax::ast::{self, make, AstNode, MatchArmList, MatchExpr, Pat};
 
 use crate::{utils, AssistContext, AssistId, AssistKind, Assists};
@@ -200,8 +202,8 @@ pub(crate) fn add_missing_match_arms(acc: &mut Assists, ctx: &AssistContext<'_>)
         AssistId("add_missing_match_arms", AssistKind::QuickFix),
         "Fill match arms",
         ctx.sema.original_range(match_expr.syntax()).range,
-        |edit| {
-            let new_match_arm_list = match_arm_list.clone_for_update();
+        |builder| {
+            let make = SyntaxFactory::new();
 
             // having any hidden variants means that we need a catch-all arm
             needs_catch_all_arm |= has_hidden_variants;
@@ -211,89 +213,85 @@ pub(crate) fn add_missing_match_arms(acc: &mut Assists, ctx: &AssistContext<'_>)
                     // filter out hidden patterns because they're handled by the catch-all arm
                     !hidden
                 })
-                .map(|(pat, _)| {
-                    make::match_arm(pat, None, make::ext::expr_todo()).clone_for_update()
-                });
+                .map(|(pat, _)| make.match_arm(pat, None, make::ext::expr_todo()));
 
-            let catch_all_arm = new_match_arm_list
+            let mut arms: Vec<_> = match_arm_list
                 .arms()
-                .find(|arm| matches!(arm.pat(), Some(ast::Pat::WildcardPat(_))));
-            if let Some(arm) = catch_all_arm {
-                let is_empty_expr = arm.expr().is_none_or(|e| match e {
-                    ast::Expr::BlockExpr(b) => {
-                        b.statements().next().is_none() && b.tail_expr().is_none()
+                .filter(|arm| {
+                    if matches!(arm.pat(), Some(ast::Pat::WildcardPat(_))) {
+                        let is_empty_expr = arm.expr().is_none_or(|e| match e {
+                            ast::Expr::BlockExpr(b) => {
+                                b.statements().next().is_none() && b.tail_expr().is_none()
+                            }
+                            ast::Expr::TupleExpr(t) => t.fields().next().is_none(),
+                            _ => false,
+                        });
+                        if is_empty_expr {
+                            false
+                        } else {
+                            cov_mark::hit!(add_missing_match_arms_empty_expr);
+                            true
+                        }
+                    } else {
+                        true
                     }
-                    ast::Expr::TupleExpr(t) => t.fields().next().is_none(),
-                    _ => false,
-                });
-                if is_empty_expr {
-                    arm.remove();
-                } else {
-                    cov_mark::hit!(add_missing_match_arms_empty_expr);
-                }
-            }
+                })
+                .collect();
 
-            let mut added_arms = Vec::new();
-            let mut todo_placeholders = Vec::new();
-            for arm in missing_arms {
-                todo_placeholders.push(arm.expr().unwrap());
-                added_arms.push(arm);
-            }
+            let first_new_arm_idx = arms.len();
+            arms.extend(missing_arms);
 
             if needs_catch_all_arm && !has_catch_all_arm {
                 cov_mark::hit!(added_wildcard_pattern);
-                let arm =
-                    make::match_arm(make::wildcard_pat().into(), None, make::ext::expr_todo())
-                        .clone_for_update();
-                todo_placeholders.push(arm.expr().unwrap());
-                added_arms.push(arm);
-            }
-
-            let first_new_arm = added_arms.first().cloned();
-            let last_new_arm = added_arms.last().cloned();
-
-            for arm in added_arms {
-                new_match_arm_list.add_arm(arm);
+                let arm = make.match_arm(make::wildcard_pat().into(), None, make::ext::expr_todo());
+                arms.push(arm);
             }
 
-            if let Some(cap) = ctx.config.snippet_cap {
-                if let Some(it) = first_new_arm
-                    .and_then(|arm| arm.syntax().descendants().find_map(ast::WildcardPat::cast))
-                {
-                    edit.add_placeholder_snippet(cap, it);
-                }
-
-                for placeholder in todo_placeholders {
-                    edit.add_placeholder_snippet(cap, placeholder);
-                }
-
-                if let Some(arm) = last_new_arm {
-                    edit.add_tabstop_after(cap, arm);
-                }
-            }
+            let new_match_arm_list = make.match_arm_list(arms);
 
-            // FIXME: Hack for mutable syntax trees not having great support for macros
+            // FIXME: Hack for syntax trees not having great support for macros
             // Just replace the element that the original range came from
             let old_place = {
                 // Find the original element
                 let file = ctx.sema.parse(arm_list_range.file_id);
                 let old_place = file.syntax().covering_element(arm_list_range.range);
 
-                // Make `old_place` mut
                 match old_place {
-                    syntax::SyntaxElement::Node(it) => {
-                        syntax::SyntaxElement::from(edit.make_syntax_mut(it))
-                    }
+                    syntax::SyntaxElement::Node(it) => it,
                     syntax::SyntaxElement::Token(it) => {
                         // If a token is found, it is '{' or '}'
                         // The parent is `{ ... }`
-                        let parent = it.parent().expect("Token must have a parent.");
-                        syntax::SyntaxElement::from(edit.make_syntax_mut(parent))
+                        it.parent().expect("Token must have a parent.")
                     }
                 }
             };
 
-            syntax::ted::replace(old_place, new_match_arm_list.syntax());
+            let mut editor = builder.make_editor(&old_place);
+            new_match_arm_list.indent(IndentLevel::from_node(&old_place));
+            editor.replace(old_place, new_match_arm_list.syntax());
+
+            if let Some(cap) = ctx.config.snippet_cap {
+                if let Some(it) = new_match_arm_list
+                    .arms()
+                    .nth(first_new_arm_idx)
+                    .and_then(|arm| arm.syntax().descendants().find_map(ast::WildcardPat::cast))
+                {
+                    editor.add_annotation(it.syntax(), builder.make_placeholder_snippet(cap));
+                }
+
+                for arm in new_match_arm_list.arms().skip(first_new_arm_idx) {
+                    if let Some(expr) = arm.expr() {
+                        editor.add_annotation(expr.syntax(), builder.make_placeholder_snippet(cap));
+                    }
+                }
+
+                if let Some(arm) = new_match_arm_list.arms().skip(first_new_arm_idx).last() {
+                    editor.add_annotation(arm.syntax(), builder.make_tabstop_after(cap));
+                }
+            }
+
+            editor.add_mappings(make.finish_with_mappings());
+            builder.add_file_edits(ctx.file_id(), editor);
         },
     )
 }
@@ -1377,6 +1375,9 @@ fn main() {
         );
     }
 
+    // FIXME: Preserving comments is quite hard in the current transitional syntax editing model.
+    // Once we migrate to new trivia model addressed in #6854, remove the ignore attribute.
+    #[ignore]
     #[test]
     fn add_missing_match_arms_preserves_comments() {
         check_assist(
@@ -1405,6 +1406,9 @@ fn foo(a: A) {
         );
     }
 
+    // FIXME: Preserving comments is quite hard in the current transitional syntax editing model.
+    // Once we migrate to new trivia model addressed in #6854, remove the ignore attribute.
+    #[ignore]
     #[test]
     fn add_missing_match_arms_preserves_comments_empty() {
         check_assist(
@@ -1502,10 +1506,10 @@ enum Test {
 
 fn foo(t: Test) {
     m!(match t {
-    Test::A => ${1:todo!()},
-    Test::B => ${2:todo!()},
-    Test::C => ${3:todo!()},$0
-});
+        Test::A => ${1:todo!()},
+        Test::B => ${2:todo!()},
+        Test::C => ${3:todo!()},$0
+    });
 }"#,
         );
     }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/expand_glob_import.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/expand_glob_import.rs
index 094fdc46eb762..0b95d6177f904 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/expand_glob_import.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/expand_glob_import.rs
@@ -3,10 +3,11 @@ use hir::{AssocItem, Enum, HasVisibility, Module, ModuleDef, Name, PathResolutio
 use ide_db::{
     defs::{Definition, NameRefClass},
     search::SearchScope,
+    source_change::SourceChangeBuilder,
 };
 use stdx::never;
 use syntax::{
-    ast::{self, make},
+    ast::{self, make, Use, UseTree, VisibilityKind},
     ted, AstNode, Direction, SyntaxNode, SyntaxToken, T,
 };
 
@@ -43,6 +44,7 @@ use crate::{
 pub(crate) fn expand_glob_import(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
     let star = ctx.find_token_syntax_at_offset(T![*])?;
     let use_tree = star.parent().and_then(ast::UseTree::cast)?;
+    let use_item = star.parent_ancestors().find_map(ast::Use::cast)?;
     let (parent, mod_path) = find_parent_and_path(&star)?;
     let target_module = match ctx.sema.resolve_path(&mod_path)? {
         PathResolution::Def(ModuleDef::Module(it)) => Expandable::Module(it),
@@ -53,8 +55,9 @@ pub(crate) fn expand_glob_import(acc: &mut Assists, ctx: &AssistContext<'_>) ->
     let current_scope = ctx.sema.scope(&star.parent()?)?;
     let current_module = current_scope.module();
 
-    let refs_in_target = find_refs_in_mod(ctx, target_module, current_module)?;
-    let imported_defs = find_imported_defs(ctx, star)?;
+    if !is_visible_from(ctx, &target_module, current_module) {
+        return None;
+    }
 
     let target = parent.either(|n| n.syntax().clone(), |n| n.syntax().clone());
     acc.add(
@@ -62,37 +65,149 @@ pub(crate) fn expand_glob_import(acc: &mut Assists, ctx: &AssistContext<'_>) ->
         "Expand glob import",
         target.text_range(),
         |builder| {
-            let use_tree = builder.make_mut(use_tree);
-
-            let names_to_import = find_names_to_import(ctx, refs_in_target, imported_defs);
-            let expanded = make::use_tree_list(names_to_import.iter().map(|n| {
-                let path = make::ext::ident_path(
-                    &n.display(ctx.db(), current_module.krate().edition(ctx.db())).to_string(),
-                );
-                make::use_tree(path, None, None, false)
-            }))
-            .clone_for_update();
-
-            match use_tree.star_token() {
-                Some(star) => {
-                    let needs_braces = use_tree.path().is_some() && names_to_import.len() != 1;
-                    if needs_braces {
-                        ted::replace(star, expanded.syntax())
-                    } else {
-                        let without_braces = expanded
-                            .syntax()
-                            .children_with_tokens()
-                            .filter(|child| !matches!(child.kind(), T!['{'] | T!['}']))
-                            .collect();
-                        ted::replace_with_many(star, without_braces)
-                    }
-                }
-                None => never!(),
-            }
+            build_expanded_import(
+                ctx,
+                builder,
+                use_tree,
+                use_item,
+                target_module,
+                current_module,
+                false,
+            )
+        },
+    )
+}
+
+// Assist: expand_glob_reexport
+//
+// Expands non-private glob imports.
+//
+// ```
+// mod foo {
+//     pub struct Bar;
+//     pub struct Baz;
+// }
+//
+// pub use foo::*$0;
+// ```
+// ->
+// ```
+// mod foo {
+//     pub struct Bar;
+//     pub struct Baz;
+// }
+//
+// pub use foo::{Bar, Baz};
+// ```
+pub(crate) fn expand_glob_reexport(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
+    let star = ctx.find_token_syntax_at_offset(T![*])?;
+    let use_tree = star.parent().and_then(ast::UseTree::cast)?;
+    let use_item = star.parent_ancestors().find_map(ast::Use::cast)?;
+    let (parent, mod_path) = find_parent_and_path(&star)?;
+    let target_module = match ctx.sema.resolve_path(&mod_path)? {
+        PathResolution::Def(ModuleDef::Module(it)) => Expandable::Module(it),
+        PathResolution::Def(ModuleDef::Adt(hir::Adt::Enum(e))) => Expandable::Enum(e),
+        _ => return None,
+    };
+
+    let current_scope = ctx.sema.scope(&star.parent()?)?;
+    let current_module = current_scope.module();
+
+    if let VisibilityKind::PubSelf = get_export_visibility_kind(&use_item) {
+        return None;
+    }
+    if !is_visible_from(ctx, &target_module, current_module) {
+        return None;
+    }
+
+    let target = parent.either(|n| n.syntax().clone(), |n| n.syntax().clone());
+    acc.add(
+        AssistId("expand_glob_reexport", AssistKind::RefactorRewrite),
+        "Expand glob reexport",
+        target.text_range(),
+        |builder| {
+            build_expanded_import(
+                ctx,
+                builder,
+                use_tree,
+                use_item,
+                target_module,
+                current_module,
+                true,
+            )
         },
     )
 }
 
+fn build_expanded_import(
+    ctx: &AssistContext<'_>,
+    builder: &mut SourceChangeBuilder,
+    use_tree: UseTree,
+    use_item: Use,
+    target_module: Expandable,
+    current_module: Module,
+    reexport_public_items: bool,
+) {
+    let (must_be_pub, visible_from) = if !reexport_public_items {
+        (false, current_module)
+    } else {
+        match get_export_visibility_kind(&use_item) {
+            VisibilityKind::Pub => (true, current_module.krate().root_module()),
+            VisibilityKind::PubCrate => (false, current_module.krate().root_module()),
+            _ => (false, current_module),
+        }
+    };
+
+    let refs_in_target = find_refs_in_mod(ctx, target_module, visible_from, must_be_pub);
+    let imported_defs = find_imported_defs(ctx, use_item);
+
+    let filtered_defs =
+        if reexport_public_items { refs_in_target } else { refs_in_target.used_refs(ctx) };
+
+    let use_tree = builder.make_mut(use_tree);
+
+    let names_to_import = find_names_to_import(filtered_defs, imported_defs);
+    let expanded = make::use_tree_list(names_to_import.iter().map(|n| {
+        let path = make::ext::ident_path(
+            &n.display(ctx.db(), current_module.krate().edition(ctx.db())).to_string(),
+        );
+        make::use_tree(path, None, None, false)
+    }))
+    .clone_for_update();
+
+    match use_tree.star_token() {
+        Some(star) => {
+            let needs_braces = use_tree.path().is_some() && names_to_import.len() != 1;
+            if needs_braces {
+                ted::replace(star, expanded.syntax())
+            } else {
+                let without_braces = expanded
+                    .syntax()
+                    .children_with_tokens()
+                    .filter(|child| !matches!(child.kind(), T!['{'] | T!['}']))
+                    .collect();
+                ted::replace_with_many(star, without_braces)
+            }
+        }
+        None => never!(),
+    }
+}
+
+fn get_export_visibility_kind(use_item: &Use) -> VisibilityKind {
+    use syntax::ast::HasVisibility as _;
+    match use_item.visibility() {
+        Some(vis) => match vis.kind() {
+            VisibilityKind::PubCrate => VisibilityKind::PubCrate,
+            VisibilityKind::Pub => VisibilityKind::Pub,
+            VisibilityKind::PubSelf => VisibilityKind::PubSelf,
+            // We don't handle pub(in ...) and pub(super) yet
+            VisibilityKind::In(_) => VisibilityKind::PubSelf,
+            VisibilityKind::PubSuper => VisibilityKind::PubSelf,
+        },
+        None => VisibilityKind::PubSelf,
+    }
+}
+
 enum Expandable {
     Module(Module),
     Enum(Enum),
@@ -130,14 +245,17 @@ struct Ref {
     // could be alias
     visible_name: Name,
     def: Definition,
+    is_pub: bool,
 }
 
 impl Ref {
-    fn from_scope_def(name: Name, scope_def: ScopeDef) -> Option<Self> {
+    fn from_scope_def(ctx: &AssistContext<'_>, name: Name, scope_def: ScopeDef) -> Option<Self> {
         match scope_def {
-            ScopeDef::ModuleDef(def) => {
-                Some(Ref { visible_name: name, def: Definition::from(def) })
-            }
+            ScopeDef::ModuleDef(def) => Some(Ref {
+                visible_name: name,
+                def: Definition::from(def),
+                is_pub: matches!(def.visibility(ctx.db()), hir::Visibility::Public),
+            }),
             _ => None,
         }
     }
@@ -180,32 +298,32 @@ fn find_refs_in_mod(
     ctx: &AssistContext<'_>,
     expandable: Expandable,
     visible_from: Module,
-) -> Option<Refs> {
-    if !is_expandable_visible_from(ctx, &expandable, visible_from) {
-        return None;
-    }
-
+    must_be_pub: bool,
+) -> Refs {
     match expandable {
         Expandable::Module(module) => {
             let module_scope = module.scope(ctx.db(), Some(visible_from));
-            let refs =
-                module_scope.into_iter().filter_map(|(n, d)| Ref::from_scope_def(n, d)).collect();
-            Some(Refs(refs))
+            let refs = module_scope
+                .into_iter()
+                .filter_map(|(n, d)| Ref::from_scope_def(ctx, n, d))
+                .filter(|r| !must_be_pub || r.is_pub)
+                .collect();
+            Refs(refs)
         }
-        Expandable::Enum(enm) => Some(Refs(
+        Expandable::Enum(enm) => Refs(
             enm.variants(ctx.db())
                 .into_iter()
-                .map(|v| Ref { visible_name: v.name(ctx.db()), def: Definition::Variant(v) })
+                .map(|v| Ref {
+                    visible_name: v.name(ctx.db()),
+                    def: Definition::Variant(v),
+                    is_pub: true,
+                })
                 .collect(),
-        )),
+        ),
     }
 }
 
-fn is_expandable_visible_from(
-    ctx: &AssistContext<'_>,
-    expandable: &Expandable,
-    from: Module,
-) -> bool {
+fn is_visible_from(ctx: &AssistContext<'_>, expandable: &Expandable, from: Module) -> bool {
     fn is_mod_visible_from(ctx: &AssistContext<'_>, module: Module, from: Module) -> bool {
         match module.parent(ctx.db()) {
             Some(parent) => {
@@ -246,50 +364,34 @@ fn is_expandable_visible_from(
 // use foo::*$0;
 // use baz::Baz;
 // ↑ ---------------
-fn find_imported_defs(ctx: &AssistContext<'_>, star: SyntaxToken) -> Option<Vec<Definition>> {
-    let parent_use_item_syntax = star.parent_ancestors().find_map(|n| {
-        if ast::Use::can_cast(n.kind()) {
-            Some(n)
-        } else {
-            None
-        }
-    })?;
-
-    Some(
-        [Direction::Prev, Direction::Next]
-            .into_iter()
-            .flat_map(|dir| {
-                parent_use_item_syntax
-                    .siblings(dir.to_owned())
-                    .filter(|n| ast::Use::can_cast(n.kind()))
-            })
-            .flat_map(|n| n.descendants().filter_map(ast::NameRef::cast))
-            .filter_map(|r| match NameRefClass::classify(&ctx.sema, &r)? {
-                NameRefClass::Definition(
-                    def @ (Definition::Macro(_)
-                    | Definition::Module(_)
-                    | Definition::Function(_)
-                    | Definition::Adt(_)
-                    | Definition::Variant(_)
-                    | Definition::Const(_)
-                    | Definition::Static(_)
-                    | Definition::Trait(_)
-                    | Definition::TypeAlias(_)),
-                    _,
-                ) => Some(def),
-                _ => None,
-            })
-            .collect(),
-    )
+fn find_imported_defs(ctx: &AssistContext<'_>, use_item: Use) -> Vec<Definition> {
+    [Direction::Prev, Direction::Next]
+        .into_iter()
+        .flat_map(|dir| {
+            use_item.syntax().siblings(dir.to_owned()).filter(|n| ast::Use::can_cast(n.kind()))
+        })
+        .flat_map(|n| n.descendants().filter_map(ast::NameRef::cast))
+        .filter_map(|r| match NameRefClass::classify(&ctx.sema, &r)? {
+            NameRefClass::Definition(
+                def @ (Definition::Macro(_)
+                | Definition::Module(_)
+                | Definition::Function(_)
+                | Definition::Adt(_)
+                | Definition::Variant(_)
+                | Definition::Const(_)
+                | Definition::Static(_)
+                | Definition::Trait(_)
+                | Definition::TypeAlias(_)),
+                _,
+            ) => Some(def),
+            _ => None,
+        })
+        .collect()
 }
 
-fn find_names_to_import(
-    ctx: &AssistContext<'_>,
-    refs_in_target: Refs,
-    imported_defs: Vec<Definition>,
-) -> Vec<Name> {
-    let used_refs = refs_in_target.used_refs(ctx).filter_out_by_defs(imported_defs);
-    used_refs.0.iter().map(|r| r.visible_name.clone()).collect()
+fn find_names_to_import(refs_in_target: Refs, imported_defs: Vec<Definition>) -> Vec<Name> {
+    let final_refs = refs_in_target.filter_out_by_defs(imported_defs);
+    final_refs.0.iter().map(|r| r.visible_name.clone()).collect()
 }
 
 #[cfg(test)]
@@ -1036,4 +1138,83 @@ mod abc {
 }"#,
         )
     }
+
+    #[test]
+    fn expanding_glob_reexport() {
+        check_assist(
+            expand_glob_reexport,
+            r"
+mod foo {
+    pub struct Bar;
+    pub struct Baz;
+    struct Qux;
+
+    pub fn f() {}
+
+    pub(crate) fn g() {}
+    pub(self) fn h() {}
+}
+
+pub use foo::*$0;
+",
+            r"
+mod foo {
+    pub struct Bar;
+    pub struct Baz;
+    struct Qux;
+
+    pub fn f() {}
+
+    pub(crate) fn g() {}
+    pub(self) fn h() {}
+}
+
+pub use foo::{Bar, Baz, f};
+",
+        )
+    }
+
+    #[test]
+    fn expanding_recursive_glob_reexport() {
+        check_assist(
+            expand_glob_reexport,
+            r"
+mod foo {
+    pub use bar::*;
+    mod bar {
+        pub struct Bar;
+        pub struct Baz;
+    }
+}
+
+pub use foo::*$0;
+",
+            r"
+mod foo {
+    pub use bar::*;
+    mod bar {
+        pub struct Bar;
+        pub struct Baz;
+    }
+}
+
+pub use foo::{Bar, Baz};
+",
+        )
+    }
+
+    #[test]
+    fn expanding_reexport_is_not_applicable_for_private_import() {
+        check_assist_not_applicable(
+            expand_glob_reexport,
+            r"
+mod foo {
+    pub struct Bar;
+    pub struct Baz;
+}
+
+use foo::*$0;
+",
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs b/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
index 5c95b25f28ddf..179742f91b4dc 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
@@ -270,6 +270,7 @@ mod handlers {
             destructure_tuple_binding::destructure_tuple_binding,
             destructure_struct_binding::destructure_struct_binding,
             expand_glob_import::expand_glob_import,
+            expand_glob_import::expand_glob_reexport,
             explicit_enum_discriminant::explicit_enum_discriminant,
             extract_expressions_from_format_string::extract_expressions_from_format_string,
             extract_struct_from_enum_variant::extract_struct_from_enum_variant,
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs b/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
index 4b0fa704a22ba..0662527a387da 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
@@ -909,6 +909,29 @@ fn qux(bar: Bar, baz: Baz) {}
     )
 }
 
+#[test]
+fn doctest_expand_glob_reexport() {
+    check_doc_test(
+        "expand_glob_reexport",
+        r#####"
+mod foo {
+    pub struct Bar;
+    pub struct Baz;
+}
+
+pub use foo::*$0;
+"#####,
+        r#####"
+mod foo {
+    pub struct Bar;
+    pub struct Baz;
+}
+
+pub use foo::{Bar, Baz};
+"#####,
+    )
+}
+
 #[test]
 fn doctest_explicit_enum_discriminant() {
     check_doc_test(
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs b/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
index 2c39a8fdfed73..28e2853096e0e 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
@@ -2,17 +2,18 @@
 
 mod format_like;
 
-use hir::ItemInNs;
-use ide_db::text_edit::TextEdit;
+use base_db::SourceDatabase;
+use hir::{ItemInNs, Semantics};
 use ide_db::{
     documentation::{Documentation, HasDocs},
     imports::insert_use::ImportScope,
+    text_edit::TextEdit,
     ty_filter::TryEnum,
-    SnippetCap,
+    RootDatabase, SnippetCap,
 };
 use stdx::never;
 use syntax::{
-    ast::{self, make, AstNode, AstToken},
+    ast::{self, AstNode, AstToken},
     SyntaxKind::{BLOCK_EXPR, EXPR_STMT, FOR_EXPR, IF_EXPR, LOOP_EXPR, STMT_LIST, WHILE_EXPR},
     TextRange, TextSize,
 };
@@ -48,7 +49,8 @@ pub(crate) fn complete_postfix(
     };
     let expr_ctx = &dot_access.ctx;
 
-    let receiver_text = get_receiver_text(dot_receiver, receiver_is_ambiguous_float_literal);
+    let receiver_text =
+        get_receiver_text(&ctx.sema, dot_receiver, receiver_is_ambiguous_float_literal);
 
     let cap = match ctx.config.snippet_cap {
         Some(it) => it,
@@ -172,13 +174,15 @@ pub(crate) fn complete_postfix(
     // The rest of the postfix completions create an expression that moves an argument,
     // so it's better to consider references now to avoid breaking the compilation
 
-    let (dot_receiver, node_to_replace_with) = include_references(dot_receiver);
-    let receiver_text =
-        get_receiver_text(&node_to_replace_with, receiver_is_ambiguous_float_literal);
-    let postfix_snippet = match build_postfix_snippet_builder(ctx, cap, &dot_receiver) {
-        Some(it) => it,
-        None => return,
-    };
+    let (dot_receiver_including_refs, prefix) = include_references(dot_receiver);
+    let mut receiver_text =
+        get_receiver_text(&ctx.sema, dot_receiver, receiver_is_ambiguous_float_literal);
+    receiver_text.insert_str(0, &prefix);
+    let postfix_snippet =
+        match build_postfix_snippet_builder(ctx, cap, &dot_receiver_including_refs) {
+            Some(it) => it,
+            None => return,
+        };
 
     if !ctx.config.snippets.is_empty() {
         add_custom_postfix_completions(acc, ctx, &postfix_snippet, &receiver_text);
@@ -222,7 +226,7 @@ pub(crate) fn complete_postfix(
     postfix_snippet("call", "function(expr)", &format!("${{1}}({receiver_text})"))
         .add_to(acc, ctx.db);
 
-    if let Some(parent) = dot_receiver.syntax().parent().and_then(|p| p.parent()) {
+    if let Some(parent) = dot_receiver_including_refs.syntax().parent().and_then(|p| p.parent()) {
         if matches!(parent.kind(), STMT_LIST | EXPR_STMT) {
             postfix_snippet("let", "let", &format!("let $0 = {receiver_text};"))
                 .add_to(acc, ctx.db);
@@ -231,9 +235,9 @@ pub(crate) fn complete_postfix(
         }
     }
 
-    if let ast::Expr::Literal(literal) = dot_receiver.clone() {
+    if let ast::Expr::Literal(literal) = dot_receiver_including_refs.clone() {
         if let Some(literal_text) = ast::String::cast(literal.token()) {
-            add_format_like_completions(acc, ctx, &dot_receiver, cap, &literal_text);
+            add_format_like_completions(acc, ctx, &dot_receiver_including_refs, cap, &literal_text);
         }
     }
 
@@ -260,14 +264,20 @@ pub(crate) fn complete_postfix(
     }
 }
 
-fn get_receiver_text(receiver: &ast::Expr, receiver_is_ambiguous_float_literal: bool) -> String {
-    let mut text = if receiver_is_ambiguous_float_literal {
-        let text = receiver.syntax().text();
-        let without_dot = ..text.len() - TextSize::of('.');
-        text.slice(without_dot).to_string()
-    } else {
-        receiver.to_string()
+fn get_receiver_text(
+    sema: &Semantics<'_, RootDatabase>,
+    receiver: &ast::Expr,
+    receiver_is_ambiguous_float_literal: bool,
+) -> String {
+    // Do not just call `receiver.to_string()`, as that will mess up whitespaces inside macros.
+    let Some(mut range) = sema.original_range_opt(receiver.syntax()) else {
+        return receiver.to_string();
     };
+    if receiver_is_ambiguous_float_literal {
+        range.range = TextRange::at(range.range.start(), range.range.len() - TextSize::of('.'))
+    }
+    let file_text = sema.db.file_text(range.file_id.file_id());
+    let mut text = file_text[range.range].to_owned();
 
     // The receiver texts should be interpreted as-is, as they are expected to be
     // normal Rust expressions.
@@ -284,7 +294,7 @@ fn escape_snippet_bits(text: &mut String) {
     stdx::replace(text, '$', "\\$");
 }
 
-fn include_references(initial_element: &ast::Expr) -> (ast::Expr, ast::Expr) {
+fn include_references(initial_element: &ast::Expr) -> (ast::Expr, String) {
     let mut resulting_element = initial_element.clone();
 
     while let Some(field_expr) = resulting_element.syntax().parent().and_then(ast::FieldExpr::cast)
@@ -292,7 +302,7 @@ fn include_references(initial_element: &ast::Expr) -> (ast::Expr, ast::Expr) {
         resulting_element = ast::Expr::from(field_expr);
     }
 
-    let mut new_element_opt = initial_element.clone();
+    let mut prefix = String::new();
 
     while let Some(parent_deref_element) =
         resulting_element.syntax().parent().and_then(ast::PrefixExpr::cast)
@@ -303,7 +313,7 @@ fn include_references(initial_element: &ast::Expr) -> (ast::Expr, ast::Expr) {
 
         resulting_element = ast::Expr::from(parent_deref_element);
 
-        new_element_opt = make::expr_prefix(syntax::T![*], new_element_opt).into();
+        prefix.insert(0, '*');
     }
 
     if let Some(first_ref_expr) = resulting_element.syntax().parent().and_then(ast::RefExpr::cast) {
@@ -317,7 +327,7 @@ fn include_references(initial_element: &ast::Expr) -> (ast::Expr, ast::Expr) {
             let exclusive = parent_ref_element.mut_token().is_some();
             resulting_element = ast::Expr::from(parent_ref_element);
 
-            new_element_opt = make::expr_ref(new_element_opt, exclusive);
+            prefix.insert_str(0, if exclusive { "&mut " } else { "&" });
         }
     } else {
         // If we do not find any ref expressions, restore
@@ -325,7 +335,7 @@ fn include_references(initial_element: &ast::Expr) -> (ast::Expr, ast::Expr) {
         resulting_element = initial_element.clone();
     }
 
-    (resulting_element, new_element_opt)
+    (resulting_element, prefix)
 }
 
 fn build_postfix_snippet_builder<'ctx>(
@@ -901,4 +911,31 @@ fn main() {
 "#,
         );
     }
+
+    #[test]
+    fn inside_macro() {
+        check_edit(
+            "box",
+            r#"
+macro_rules! assert {
+    ( $it:expr $(,)? ) => { $it };
+}
+
+fn foo() {
+    let a = true;
+    assert!(if a == false { true } else { false }.$0);
+}
+        "#,
+            r#"
+macro_rules! assert {
+    ( $it:expr $(,)? ) => { $it };
+}
+
+fn foo() {
+    let a = true;
+    assert!(Box::new(if a == false { true } else { false }));
+}
+        "#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/defs.rs b/src/tools/rust-analyzer/crates/ide-db/src/defs.rs
index bad536080567f..6f71c3d9bd7e3 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/defs.rs
+++ b/src/tools/rust-analyzer/crates/ide-db/src/defs.rs
@@ -108,7 +108,7 @@ impl Definition {
                 ItemContainer::Trait(it) => Some(it.into()),
                 ItemContainer::Impl(it) => Some(it.into()),
                 ItemContainer::Module(it) => Some(it.into()),
-                ItemContainer::ExternBlock() | ItemContainer::Crate(_) => None,
+                ItemContainer::ExternBlock(_) | ItemContainer::Crate(_) => None,
             }
         }
         match self {
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mismatched_arg_count.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mismatched_arg_count.rs
index 7126617cdeed3..0520bb3fe9b9b 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mismatched_arg_count.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mismatched_arg_count.rs
@@ -40,7 +40,7 @@ pub(crate) fn mismatched_arg_count(
     Diagnostic::new(
         DiagnosticCode::RustcHardError("E0107"),
         message,
-        invalid_args_range(ctx, d.call_expr.map(AstPtr::wrap_left), d.expected, d.found),
+        invalid_args_range(ctx, d.call_expr, d.expected, d.found),
     )
 }
 
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/parenthesized_generic_args_without_fn_trait.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/parenthesized_generic_args_without_fn_trait.rs
new file mode 100644
index 0000000000000..ccf5172341836
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/parenthesized_generic_args_without_fn_trait.rs
@@ -0,0 +1,59 @@
+use crate::{Diagnostic, DiagnosticCode, DiagnosticsContext};
+
+// Diagnostic: parenthesized-generic-args-without-fn-trait
+//
+// This diagnostic is shown when a `Fn`-trait-style generic parameters (`Trait(A, B) -> C`)
+// was used on non-`Fn` trait/type.
+pub(crate) fn parenthesized_generic_args_without_fn_trait(
+    ctx: &DiagnosticsContext<'_>,
+    d: &hir::ParenthesizedGenericArgsWithoutFnTrait,
+) -> Diagnostic {
+    Diagnostic::new_with_syntax_node_ptr(
+        ctx,
+        DiagnosticCode::RustcHardError("E0214"),
+        "parenthesized type parameters may only be used with a `Fn` trait",
+        d.args.map(Into::into),
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::tests::check_diagnostics;
+
+    #[test]
+    fn fn_traits_work() {
+        check_diagnostics(
+            r#"
+//- minicore: async_fn, fn
+fn foo<
+    A: Fn(),
+    B: FnMut() -> i32,
+    C: FnOnce(&str, bool),
+    D: AsyncFn::(u32) -> u32,
+    E: AsyncFnMut(),
+    F: AsyncFnOnce() -> bool,
+>() {}
+        "#,
+        );
+    }
+
+    #[test]
+    fn non_fn_trait() {
+        check_diagnostics(
+            r#"
+struct Struct<T>(T);
+enum Enum<T> { EnumVariant(T) }
+type TypeAlias<T> = bool;
+
+type Foo = TypeAlias() -> bool;
+                 // ^^ error: parenthesized type parameters may only be used with a `Fn` trait
+
+fn foo(_a: Struct(i32)) {
+              // ^^^^^ error: parenthesized type parameters may only be used with a `Fn` trait
+    let _ = <Enum::(u32)>::EnumVariant(0);
+              // ^^^^^^^ error: parenthesized type parameters may only be used with a `Fn` trait
+}
+        "#,
+        );
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/type_mismatch.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/type_mismatch.rs
index 73dcbc13b79a1..7cf8282d05292 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/type_mismatch.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/type_mismatch.rs
@@ -1235,4 +1235,25 @@ fn f() {
 "#,
         );
     }
+
+    #[test]
+    fn complex_enum_variant_non_ref_pat() {
+        check_diagnostics(
+            r#"
+enum Enum { Variant }
+
+trait Trait {
+    type Assoc;
+}
+impl Trait for () {
+    type Assoc = Enum;
+}
+
+fn foo(v: &Enum) {
+    let <Enum>::Variant = v;
+    let <() as Trait>::Assoc::Variant = v;
+}
+    "#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_field.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_field.rs
index 4accd181ca43f..dfb03eee732ab 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_field.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_field.rs
@@ -1,5 +1,6 @@
 use std::iter;
 
+use either::Either;
 use hir::{db::ExpandDatabase, Adt, FileRange, HasSource, HirDisplay, InFile, Struct, Union};
 use ide_db::text_edit::TextEdit;
 use ide_db::{
@@ -41,7 +42,7 @@ pub(crate) fn unresolved_field(
         ),
         adjusted_display_range(ctx, d.expr, &|expr| {
             Some(
-                match expr {
+                match expr.left()? {
                     ast::Expr::MethodCallExpr(it) => it.name_ref(),
                     ast::Expr::FieldExpr(it) => it.name_ref(),
                     _ => None,
@@ -72,7 +73,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedField) -> Option<Vec<A
 fn field_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedField) -> Option<Assist> {
     // Get the FileRange of the invalid field access
     let root = ctx.sema.db.parse_or_expand(d.expr.file_id);
-    let expr = d.expr.value.to_node(&root);
+    let expr = d.expr.value.to_node(&root).left()?;
 
     let error_range = ctx.sema.original_range_opt(expr.syntax())?;
     let field_name = d.name.as_str();
@@ -263,7 +264,7 @@ fn record_field_layout(
 // FIXME: We should fill out the call here, move the cursor and trigger signature help
 fn method_fix(
     ctx: &DiagnosticsContext<'_>,
-    expr_ptr: &InFile<AstPtr<ast::Expr>>,
+    expr_ptr: &InFile<AstPtr<Either<ast::Expr, ast::Pat>>>,
 ) -> Option<Assist> {
     let root = ctx.sema.db.parse_or_expand(expr_ptr.file_id);
     let expr = expr_ptr.value.to_node(&root);
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_method.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_method.rs
index 4ab649cc16282..e4de107249bd5 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_method.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unresolved_method.rs
@@ -1,4 +1,4 @@
-use hir::{db::ExpandDatabase, AssocItem, FileRange, HirDisplay, InFile};
+use hir::{db::ExpandDatabase, FileRange, HirDisplay, InFile};
 use ide_db::text_edit::TextEdit;
 use ide_db::{
     assists::{Assist, AssistId, AssistKind},
@@ -35,7 +35,7 @@ pub(crate) fn unresolved_method(
         ),
         adjusted_display_range(ctx, d.expr, &|expr| {
             Some(
-                match expr {
+                match expr.left()? {
                     ast::Expr::MethodCallExpr(it) => it.name_ref(),
                     ast::Expr::FieldExpr(it) => it.name_ref(),
                     _ => None,
@@ -85,7 +85,7 @@ fn field_fix(
     let expr_ptr = &d.expr;
     let root = ctx.sema.db.parse_or_expand(expr_ptr.file_id);
     let expr = expr_ptr.value.to_node(&root);
-    let (file_id, range) = match expr {
+    let (file_id, range) = match expr.left()? {
         ast::Expr::MethodCallExpr(mcall) => {
             let FileRange { range, file_id } =
                 ctx.sema.original_range_opt(mcall.receiver()?.syntax())?;
@@ -112,12 +112,12 @@ fn field_fix(
 }
 
 fn assoc_func_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall) -> Option<Assist> {
-    if let Some(assoc_item_id) = d.assoc_func_with_same_name {
+    if let Some(f) = d.assoc_func_with_same_name {
         let db = ctx.sema.db;
 
         let expr_ptr = &d.expr;
         let root = db.parse_or_expand(expr_ptr.file_id);
-        let expr: ast::Expr = expr_ptr.value.to_node(&root);
+        let expr: ast::Expr = expr_ptr.value.to_node(&root).left()?;
 
         let call = ast::MethodCallExpr::cast(expr.syntax().clone())?;
         let range = InFile::new(expr_ptr.file_id, call.syntax().text_range())
@@ -127,30 +127,25 @@ fn assoc_func_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall) -
         let receiver = call.receiver()?;
         let receiver_type = &ctx.sema.type_of_expr(&receiver)?.original;
 
-        let need_to_take_receiver_as_first_arg = match hir::AssocItem::from(assoc_item_id) {
-            AssocItem::Function(f) => {
-                let assoc_fn_params = f.assoc_fn_params(db);
-                if assoc_fn_params.is_empty() {
-                    false
-                } else {
-                    assoc_fn_params
-                        .first()
-                        .map(|first_arg| {
-                            // For generic type, say `Box`, take `Box::into_raw(b: Self)` as example,
-                            // type of `b` is `Self`, which is `Box<T, A>`, containing unspecified generics.
-                            // However, type of `receiver` is specified, it could be `Box<i32, Global>` or something like that,
-                            // so `first_arg.ty() == receiver_type` evaluate to `false` here.
-                            // Here add `first_arg.ty().as_adt() == receiver_type.as_adt()` as guard,
-                            // apply `.as_adt()` over `Box<T, A>` or `Box<i32, Global>` gets `Box`, so we get `true` here.
-
-                            // FIXME: it fails when type of `b` is `Box` with other generic param different from `receiver`
-                            first_arg.ty() == receiver_type
-                                || first_arg.ty().as_adt() == receiver_type.as_adt()
-                        })
-                        .unwrap_or(false)
-                }
-            }
-            _ => false,
+        let assoc_fn_params = f.assoc_fn_params(db);
+        let need_to_take_receiver_as_first_arg = if assoc_fn_params.is_empty() {
+            false
+        } else {
+            assoc_fn_params
+                .first()
+                .map(|first_arg| {
+                    // For generic type, say `Box`, take `Box::into_raw(b: Self)` as example,
+                    // type of `b` is `Self`, which is `Box<T, A>`, containing unspecified generics.
+                    // However, type of `receiver` is specified, it could be `Box<i32, Global>` or something like that,
+                    // so `first_arg.ty() == receiver_type` evaluate to `false` here.
+                    // Here add `first_arg.ty().as_adt() == receiver_type.as_adt()` as guard,
+                    // apply `.as_adt()` over `Box<T, A>` or `Box<i32, Global>` gets `Box`, so we get `true` here.
+
+                    // FIXME: it fails when type of `b` is `Box` with other generic param different from `receiver`
+                    first_arg.ty() == receiver_type
+                        || first_arg.ty().as_adt() == receiver_type.as_adt()
+                })
+                .unwrap_or(false)
         };
 
         let mut receiver_type_adt_name =
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unused_variables.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unused_variables.rs
index 67ece5669419e..d5caf4de3367e 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unused_variables.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/unused_variables.rs
@@ -260,6 +260,19 @@ fn main() {
     let arr = [1, 2, 3, 4, 5];
     let [_x, _y @ ..] = arr;
 }
+"#,
+        );
+    }
+
+    // regression test as we used to panic in this scenario
+    #[test]
+    fn unknown_struct_pattern_param_type() {
+        check_diagnostics(
+            r#"
+struct S { field : u32 }
+fn f(S { field }: error) {
+      // ^^^^^ 💡 warn: unused variable
+}
 "#,
         );
     }
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs
index 50c91a69602c1..3ea41aa7e859c 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/lib.rs
@@ -43,6 +43,7 @@ mod handlers {
     pub(crate) mod mutability_errors;
     pub(crate) mod no_such_field;
     pub(crate) mod non_exhaustive_let;
+    pub(crate) mod parenthesized_generic_args_without_fn_trait;
     pub(crate) mod private_assoc_item;
     pub(crate) mod private_field;
     pub(crate) mod remove_trailing_return;
@@ -466,7 +467,12 @@ pub fn semantic_diagnostics(
                 Some(it) => it,
                 None => continue,
             },
-            AnyDiagnostic::GenericArgsProhibited(d) => handlers::generic_args_prohibited::generic_args_prohibited(&ctx, &d)
+            AnyDiagnostic::GenericArgsProhibited(d) => {
+                handlers::generic_args_prohibited::generic_args_prohibited(&ctx, &d)
+            }
+            AnyDiagnostic::ParenthesizedGenericArgsWithoutFnTrait(d) => {
+                handlers::parenthesized_generic_args_without_fn_trait::parenthesized_generic_args_without_fn_trait(&ctx, &d)
+            }
         };
         res.push(d)
     }
diff --git a/src/tools/rust-analyzer/crates/ide/src/annotations.rs b/src/tools/rust-analyzer/crates/ide/src/annotations.rs
index 006e6e8246e1c..e47891bbdfe7e 100644
--- a/src/tools/rust-analyzer/crates/ide/src/annotations.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/annotations.rs
@@ -1,6 +1,6 @@
 use hir::{HasSource, InFile, InRealFile, Semantics};
 use ide_db::{
-    defs::Definition, helpers::visit_file_defs, FileId, FilePosition, FileRange, FxHashSet,
+    defs::Definition, helpers::visit_file_defs, FileId, FilePosition, FileRange, FxIndexSet,
     RootDatabase,
 };
 use itertools::Itertools;
@@ -55,7 +55,7 @@ pub(crate) fn annotations(
     config: &AnnotationConfig,
     file_id: FileId,
 ) -> Vec<Annotation> {
-    let mut annotations = FxHashSet::default();
+    let mut annotations = FxIndexSet::default();
 
     if config.annotate_runnables {
         for runnable in runnables(db, file_id) {
@@ -170,7 +170,12 @@ pub(crate) fn annotations(
         }));
     }
 
-    annotations.into_iter().sorted_by_key(|a| (a.range.start(), a.range.end())).collect()
+    annotations
+        .into_iter()
+        .sorted_by_key(|a| {
+            (a.range.start(), a.range.end(), matches!(a.kind, AnnotationKind::Runnable(..)))
+        })
+        .collect()
 }
 
 pub(crate) fn resolve_annotation(db: &RootDatabase, mut annotation: Annotation) -> Annotation {
@@ -535,6 +540,20 @@ fn main() {
                             ),
                         },
                     },
+                    Annotation {
+                        range: 69..73,
+                        kind: HasReferences {
+                            pos: FilePositionWrapper {
+                                file_id: FileId(
+                                    0,
+                                ),
+                                offset: 69,
+                            },
+                            data: Some(
+                                [],
+                            ),
+                        },
+                    },
                     Annotation {
                         range: 69..73,
                         kind: Runnable(
@@ -559,20 +578,6 @@ fn main() {
                             },
                         ),
                     },
-                    Annotation {
-                        range: 69..73,
-                        kind: HasReferences {
-                            pos: FilePositionWrapper {
-                                file_id: FileId(
-                                    0,
-                                ),
-                                offset: 69,
-                            },
-                            data: Some(
-                                [],
-                            ),
-                        },
-                    },
                 ]
             "#]],
         );
@@ -717,6 +722,20 @@ fn main() {
                             ),
                         },
                     },
+                    Annotation {
+                        range: 61..65,
+                        kind: HasReferences {
+                            pos: FilePositionWrapper {
+                                file_id: FileId(
+                                    0,
+                                ),
+                                offset: 61,
+                            },
+                            data: Some(
+                                [],
+                            ),
+                        },
+                    },
                     Annotation {
                         range: 61..65,
                         kind: Runnable(
@@ -741,20 +760,6 @@ fn main() {
                             },
                         ),
                     },
-                    Annotation {
-                        range: 61..65,
-                        kind: HasReferences {
-                            pos: FilePositionWrapper {
-                                file_id: FileId(
-                                    0,
-                                ),
-                                offset: 61,
-                            },
-                            data: Some(
-                                [],
-                            ),
-                        },
-                    },
                 ]
             "#]],
         );
diff --git a/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs b/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs
index bdafb701ff534..60a904233a9a5 100644
--- a/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/goto_definition.rs
@@ -3290,4 +3290,38 @@ fn main() {
     "#,
         );
     }
+
+    #[test]
+    fn shadow_builtin_type_by_module() {
+        check(
+            r#"
+mod Foo{
+pub mod str {
+     // ^^^
+    pub fn foo() {}
+}
+}
+
+fn main() {
+    use Foo::str;
+    let s = st$0r::foo();
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn not_goto_module_because_str_is_builtin_type() {
+        check(
+            r#"
+mod str {
+pub fn foo() {}
+}
+
+fn main() {
+    let s = st$0r::f();
+}
+"#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/extern_block.rs b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/extern_block.rs
index 2bc91b68ed8fc..652dff0bc56e7 100644
--- a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/extern_block.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/extern_block.rs
@@ -7,7 +7,7 @@ use crate::{InlayHint, InlayHintsConfig};
 
 pub(super) fn extern_block_hints(
     acc: &mut Vec<InlayHint>,
-    FamousDefs(_sema, _): &FamousDefs<'_, '_>,
+    FamousDefs(sema, _): &FamousDefs<'_, '_>,
     config: &InlayHintsConfig,
     _file_id: EditionedFileId,
     extern_block: ast::ExternBlock,
@@ -16,6 +16,7 @@ pub(super) fn extern_block_hints(
         return None;
     }
     let abi = extern_block.abi()?;
+    sema.to_def(&extern_block)?;
     acc.push(InlayHint {
         range: abi.syntax().text_range(),
         position: crate::InlayHintPosition::Before,
@@ -33,7 +34,7 @@ pub(super) fn extern_block_hints(
 
 pub(super) fn fn_hints(
     acc: &mut Vec<InlayHint>,
-    FamousDefs(_sema, _): &FamousDefs<'_, '_>,
+    FamousDefs(sema, _): &FamousDefs<'_, '_>,
     config: &InlayHintsConfig,
     _file_id: EditionedFileId,
     fn_: &ast::Fn,
@@ -43,14 +44,16 @@ pub(super) fn fn_hints(
     if !implicit_unsafe {
         return None;
     }
-    let fn_ = fn_.fn_token()?;
-    acc.push(item_hint(config, extern_block, fn_));
+    let fn_token = fn_.fn_token()?;
+    if sema.to_def(fn_).is_some_and(|def| def.extern_block(sema.db).is_some()) {
+        acc.push(item_hint(config, extern_block, fn_token));
+    }
     Some(())
 }
 
 pub(super) fn static_hints(
     acc: &mut Vec<InlayHint>,
-    FamousDefs(_sema, _): &FamousDefs<'_, '_>,
+    FamousDefs(sema, _): &FamousDefs<'_, '_>,
     config: &InlayHintsConfig,
     _file_id: EditionedFileId,
     static_: &ast::Static,
@@ -60,8 +63,10 @@ pub(super) fn static_hints(
     if !implicit_unsafe {
         return None;
     }
-    let static_ = static_.static_token()?;
-    acc.push(item_hint(config, extern_block, static_));
+    let static_token = static_.static_token()?;
+    if sema.to_def(static_).is_some_and(|def| def.extern_block(sema.db).is_some()) {
+        acc.push(item_hint(config, extern_block, static_token));
+    }
     Some(())
 }
 
diff --git a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs
index 27c7c3d498187..390139d214eb0 100644
--- a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs
@@ -54,7 +54,8 @@ pub(super) fn hints(
             };
             let range = match terminator.span {
                 MirSpan::ExprId(e) => match source_map.expr_syntax(e) {
-                    Ok(s) => {
+                    // don't show inlay hint for macro
+                    Ok(s) if !s.file_id.is_macro() => {
                         let root = &s.file_syntax(sema.db);
                         let expr = s.value.to_node(root);
                         let expr = expr.syntax();
@@ -69,11 +70,11 @@ pub(super) fn hints(
                             }
                         }
                     }
-                    Err(_) => continue,
+                    _ => continue,
                 },
                 MirSpan::PatId(p) => match source_map.pat_syntax(p) {
-                    Ok(s) => s.value.text_range(),
-                    Err(_) => continue,
+                    Ok(s) if !s.file_id.is_macro() => s.value.text_range(),
+                    _ => continue,
                 },
                 MirSpan::BindingId(b) => {
                     match source_map
@@ -81,13 +82,13 @@ pub(super) fn hints(
                         .iter()
                         .find_map(|p| source_map.pat_syntax(*p).ok())
                     {
-                        Some(s) => s.value.text_range(),
-                        None => continue,
+                        Some(s) if !s.file_id.is_macro() => s.value.text_range(),
+                        _ => continue,
                     }
                 }
                 MirSpan::SelfParam => match source_map.self_param_syntax() {
-                    Some(s) => s.value.text_range(),
-                    None => continue,
+                    Some(s) if !s.file_id.is_macro() => s.value.text_range(),
+                    _ => continue,
                 },
                 MirSpan::Unknown => continue,
             };
@@ -228,6 +229,27 @@ mod tests {
       //^ drop(y)
     }
   //^ drop(x)
+"#,
+        );
+    }
+
+    #[test]
+    fn ignore_inlay_hint_for_macro_call() {
+        check_with_config(
+            ONLY_DROP_CONFIG,
+            r#"
+    struct X;
+
+    macro_rules! my_macro {
+        () => {{
+            let bbb = X;
+            bbb
+        }};
+    }
+
+    fn test() -> X {
+        my_macro!()
+    }
 "#,
         );
     }
diff --git a/src/tools/rust-analyzer/crates/ide/src/runnables.rs b/src/tools/rust-analyzer/crates/ide/src/runnables.rs
index 78c9f2309a0d4..509ae3204c36d 100644
--- a/src/tools/rust-analyzer/crates/ide/src/runnables.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/runnables.rs
@@ -4,8 +4,8 @@ use arrayvec::ArrayVec;
 use ast::HasName;
 use cfg::{CfgAtom, CfgExpr};
 use hir::{
-    db::HirDatabase, sym, AsAssocItem, AttrsWithOwner, HasAttrs, HasCrate, HasSource, HirFileIdExt,
-    ModPath, Name, PathKind, Semantics, Symbol,
+    db::HirDatabase, sym, symbols::FxIndexSet, AsAssocItem, AttrsWithOwner, HasAttrs, HasCrate,
+    HasSource, HirFileIdExt, ModPath, Name, PathKind, Semantics, Symbol,
 };
 use ide_assists::utils::{has_test_related_attribute, test_related_attribute_syn};
 use ide_db::{
@@ -13,7 +13,7 @@ use ide_db::{
     documentation::docs_from_attrs,
     helpers::visit_file_defs,
     search::{FileReferenceNode, SearchScope},
-    FilePosition, FxHashMap, FxHashSet, RootDatabase, SymbolKind,
+    FilePosition, FxHashMap, FxIndexMap, RootDatabase, SymbolKind,
 };
 use itertools::Itertools;
 use smallvec::SmallVec;
@@ -61,8 +61,8 @@ pub enum RunnableKind {
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
 enum RunnableDiscKind {
-    Test,
     TestMod,
+    Test,
     DocTest,
     Bench,
     Bin,
@@ -130,7 +130,7 @@ pub(crate) fn runnables(db: &RootDatabase, file_id: FileId) -> Vec<Runnable> {
     let mut res = Vec::new();
     // Record all runnables that come from macro expansions here instead.
     // In case an expansion creates multiple runnables we want to name them to avoid emitting a bunch of equally named runnables.
-    let mut in_macro_expansion = FxHashMap::<hir::HirFileId, Vec<Runnable>>::default();
+    let mut in_macro_expansion = FxIndexMap::<hir::HirFileId, Vec<Runnable>>::default();
     let mut add_opt = |runnable: Option<Runnable>, def| {
         if let Some(runnable) = runnable.filter(|runnable| runnable.nav.file_id == file_id) {
             if let Some(def) = def {
@@ -182,20 +182,7 @@ pub(crate) fn runnables(db: &RootDatabase, file_id: FileId) -> Vec<Runnable> {
             r
         })
     }));
-    res.sort_by(|Runnable { nav, kind, .. }, Runnable { nav: nav_b, kind: kind_b, .. }| {
-        // full_range.start < focus_range.start < name, should give us a decent unique ordering
-        nav.full_range
-            .start()
-            .cmp(&nav_b.full_range.start())
-            .then_with(|| {
-                let t_0 = || TextSize::from(0);
-                nav.focus_range
-                    .map_or_else(t_0, |it| it.start())
-                    .cmp(&nav_b.focus_range.map_or_else(t_0, |it| it.start()))
-            })
-            .then_with(|| kind.disc().cmp(&kind_b.disc()))
-            .then_with(|| nav.name.cmp(&nav_b.name))
-    });
+    res.sort_by(cmp_runnables);
     res
 }
 
@@ -215,12 +202,30 @@ pub(crate) fn related_tests(
     search_scope: Option<SearchScope>,
 ) -> Vec<Runnable> {
     let sema = Semantics::new(db);
-    let mut res: FxHashSet<Runnable> = FxHashSet::default();
+    let mut res: FxIndexSet<Runnable> = FxIndexSet::default();
     let syntax = sema.parse_guess_edition(position.file_id).syntax().clone();
 
     find_related_tests(&sema, &syntax, position, search_scope, &mut res);
 
-    res.into_iter().collect()
+    res.into_iter().sorted_by(cmp_runnables).collect()
+}
+
+fn cmp_runnables(
+    Runnable { nav, kind, .. }: &Runnable,
+    Runnable { nav: nav_b, kind: kind_b, .. }: &Runnable,
+) -> std::cmp::Ordering {
+    // full_range.start < focus_range.start < name, should give us a decent unique ordering
+    nav.full_range
+        .start()
+        .cmp(&nav_b.full_range.start())
+        .then_with(|| {
+            let t_0 = || TextSize::from(0);
+            nav.focus_range
+                .map_or_else(t_0, |it| it.start())
+                .cmp(&nav_b.focus_range.map_or_else(t_0, |it| it.start()))
+        })
+        .then_with(|| kind.disc().cmp(&kind_b.disc()))
+        .then_with(|| nav.name.cmp(&nav_b.name))
 }
 
 fn find_related_tests(
@@ -228,7 +233,7 @@ fn find_related_tests(
     syntax: &SyntaxNode,
     position: FilePosition,
     search_scope: Option<SearchScope>,
-    tests: &mut FxHashSet<Runnable>,
+    tests: &mut FxIndexSet<Runnable>,
 ) {
     // FIXME: why is this using references::find_defs, this should use ide_db::search
     let defs = match references::find_defs(sema, syntax, position.offset) {
@@ -268,7 +273,7 @@ fn find_related_tests_in_module(
     syntax: &SyntaxNode,
     fn_def: &ast::Fn,
     parent_module: &hir::Module,
-    tests: &mut FxHashSet<Runnable>,
+    tests: &mut FxIndexSet<Runnable>,
 ) {
     let fn_name = match fn_def.name() {
         Some(it) => it,
@@ -1228,8 +1233,8 @@ gen_main!();
                     "(TestMod, NavigationTarget { file_id: FileId(0), full_range: 0..315, name: \"\", kind: Module })",
                     "(TestMod, NavigationTarget { file_id: FileId(0), full_range: 267..292, focus_range: 271..276, name: \"tests\", kind: Module, description: \"mod tests\" })",
                     "(Test, NavigationTarget { file_id: FileId(0), full_range: 283..290, name: \"foo_test\", kind: Function })",
-                    "(Test, NavigationTarget { file_id: FileId(0), full_range: 293..301, name: \"foo_test2\", kind: Function }, true)",
                     "(TestMod, NavigationTarget { file_id: FileId(0), full_range: 293..301, name: \"tests2\", kind: Module, description: \"mod tests2\" }, true)",
+                    "(Test, NavigationTarget { file_id: FileId(0), full_range: 293..301, name: \"foo_test2\", kind: Function }, true)",
                     "(Bin, NavigationTarget { file_id: FileId(0), full_range: 302..314, name: \"main\", kind: Function })",
                 ]
             "#]],
@@ -1258,10 +1263,10 @@ foo!();
 "#,
             expect![[r#"
                 [
+                    "(TestMod, NavigationTarget { file_id: FileId(0), full_range: 210..217, name: \"foo_tests\", kind: Module, description: \"mod foo_tests\" }, true)",
                     "(Test, NavigationTarget { file_id: FileId(0), full_range: 210..217, name: \"foo0\", kind: Function }, true)",
                     "(Test, NavigationTarget { file_id: FileId(0), full_range: 210..217, name: \"foo1\", kind: Function }, true)",
                     "(Test, NavigationTarget { file_id: FileId(0), full_range: 210..217, name: \"foo2\", kind: Function }, true)",
-                    "(TestMod, NavigationTarget { file_id: FileId(0), full_range: 210..217, name: \"foo_tests\", kind: Module, description: \"mod foo_tests\" }, true)",
                 ]
             "#]],
         );
@@ -1501,18 +1506,18 @@ mod tests {
                         file_id: FileId(
                             0,
                         ),
-                        full_range: 121..185,
-                        focus_range: 136..145,
-                        name: "foo2_test",
+                        full_range: 52..115,
+                        focus_range: 67..75,
+                        name: "foo_test",
                         kind: Function,
                     },
                     NavigationTarget {
                         file_id: FileId(
                             0,
                         ),
-                        full_range: 52..115,
-                        focus_range: 67..75,
-                        name: "foo_test",
+                        full_range: 121..185,
+                        focus_range: 136..145,
+                        name: "foo2_test",
                         kind: Function,
                     },
                 ]
diff --git a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/highlight.rs b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/highlight.rs
index 479c0b381a4bb..194fde1160119 100644
--- a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/highlight.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/highlight.rs
@@ -703,6 +703,7 @@ fn highlight_name_ref_by_syntax(
     };
 
     match parent.kind() {
+        EXTERN_CRATE => HlTag::Symbol(SymbolKind::Module) | HlMod::CrateRoot,
         METHOD_CALL_EXPR => ast::MethodCallExpr::cast(parent)
             .and_then(|it| highlight_method_call(sema, krate, &it, edition))
             .unwrap_or_else(|| SymbolKind::Method.into()),
diff --git a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html
index 5ff96ae2a74f2..eb77c14c2a570 100644
--- a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html
+++ b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html
@@ -50,6 +50,15 @@
 <span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">fn</span><span class="none injected"> </span><span class="function declaration injected">test</span><span class="parenthesis injected">(</span><span class="parenthesis injected">)</span><span class="none injected"> </span><span class="brace injected">{</span><span class="brace injected">}</span>
 <span class="comment documentation">//! ```</span>
 
+<span class="comment documentation">//! ```rust</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="self_keyword crate_root injected">self</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">std</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">core</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">alloc</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">proc_macro</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">test</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">Krate</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//! ```</span>
 <span class="keyword">mod</span> <span class="module declaration">outline_module</span><span class="semicolon">;</span>
 
 <span class="comment documentation">/// ```</span>
diff --git a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_general.html b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_general.html
index 9be7c92fc798a..9477d0d1b8770 100644
--- a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_general.html
+++ b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_general.html
@@ -48,17 +48,6 @@
 <pre><code><span class="keyword">use</span> <span class="module">inner</span><span class="operator">::</span><span class="brace">{</span><span class="self_keyword">self</span> <span class="keyword">as</span> <span class="module declaration">inner_mod</span><span class="brace">}</span><span class="semicolon">;</span>
 <span class="keyword">mod</span> <span class="module declaration">inner</span> <span class="brace">{</span><span class="brace">}</span>
 
-<span class="keyword">pub</span> <span class="keyword">mod</span> <span class="module declaration public">ops</span> <span class="brace">{</span>
-    <span class="attribute_bracket attribute">#</span><span class="attribute_bracket attribute">[</span><span class="builtin_attr attribute">lang</span> <span class="operator attribute">=</span> <span class="string_literal attribute">"fn_once"</span><span class="attribute_bracket attribute">]</span>
-    <span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration public">FnOnce</span><span class="angle">&lt;</span><span class="type_param declaration">Args</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="brace">}</span>
-
-    <span class="attribute_bracket attribute">#</span><span class="attribute_bracket attribute">[</span><span class="builtin_attr attribute">lang</span> <span class="operator attribute">=</span> <span class="string_literal attribute">"fn_mut"</span><span class="attribute_bracket attribute">]</span>
-    <span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration public">FnMut</span><span class="angle">&lt;</span><span class="type_param declaration">Args</span><span class="angle">&gt;</span><span class="colon">:</span> <span class="trait public">FnOnce</span><span class="angle">&lt;</span><span class="type_param">Args</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="brace">}</span>
-
-    <span class="attribute_bracket attribute">#</span><span class="attribute_bracket attribute">[</span><span class="builtin_attr attribute">lang</span> <span class="operator attribute">=</span> <span class="string_literal attribute">"fn"</span><span class="attribute_bracket attribute">]</span>
-    <span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration public">Fn</span><span class="angle">&lt;</span><span class="type_param declaration">Args</span><span class="angle">&gt;</span><span class="colon">:</span> <span class="trait public">FnMut</span><span class="angle">&lt;</span><span class="type_param">Args</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="brace">}</span>
-<span class="brace">}</span>
-
 <span class="keyword">struct</span> <span class="struct declaration">Foo</span> <span class="brace">{</span>
     <span class="field declaration">x</span><span class="colon">:</span> <span class="builtin_type">u32</span><span class="comma">,</span>
 <span class="brace">}</span>
@@ -125,8 +114,8 @@
     <span class="const_param const">FOO</span>
 <span class="brace">}</span>
 
-<span class="keyword">use</span> <span class="module public">ops</span><span class="operator">::</span><span class="trait public">Fn</span><span class="semicolon">;</span>
-<span class="keyword">fn</span> <span class="function declaration">baz</span><span class="angle">&lt;</span><span class="type_param declaration">F</span><span class="colon">:</span> <span class="trait public">Fn</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="parenthesis">(</span><span class="parenthesis">)</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="value_param callable declaration">f</span><span class="colon">:</span> <span class="type_param">F</span><span class="parenthesis">)</span> <span class="brace">{</span>
+<span class="keyword">use</span> <span class="module crate_root default_library library">core</span><span class="operator">::</span><span class="module default_library library">ops</span><span class="operator">::</span><span class="trait default_library library">Fn</span><span class="semicolon">;</span>
+<span class="keyword">fn</span> <span class="function declaration">baz</span><span class="angle">&lt;</span><span class="type_param declaration">F</span><span class="colon">:</span> <span class="trait default_library library">Fn</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="parenthesis">(</span><span class="parenthesis">)</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="value_param callable declaration">f</span><span class="colon">:</span> <span class="type_param">F</span><span class="parenthesis">)</span> <span class="brace">{</span>
     <span class="value_param callable">f</span><span class="parenthesis">(</span><span class="parenthesis">)</span>
 <span class="brace">}</span>
 
diff --git a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/tests.rs b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/tests.rs
index b9520ae2bba27..3775265f234db 100644
--- a/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/tests.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/tests.rs
@@ -136,22 +136,11 @@ use self::foo as bar;
 fn test_highlighting() {
     check_highlighting(
         r#"
-//- minicore: derive, copy
+//- minicore: derive, copy, fn
 //- /main.rs crate:main deps:foo
 use inner::{self as inner_mod};
 mod inner {}
 
-pub mod ops {
-    #[lang = "fn_once"]
-    pub trait FnOnce<Args> {}
-
-    #[lang = "fn_mut"]
-    pub trait FnMut<Args>: FnOnce<Args> {}
-
-    #[lang = "fn"]
-    pub trait Fn<Args>: FnMut<Args> {}
-}
-
 struct Foo {
     x: u32,
 }
@@ -218,7 +207,7 @@ fn const_param<const FOO: usize>() -> usize {
     FOO
 }
 
-use ops::Fn;
+use core::ops::Fn;
 fn baz<F: Fn() -> ()>(f: F) {
     f()
 }
@@ -722,6 +711,15 @@ fn test_highlight_doc_comment() {
 //! fn test() {}
 //! ```
 
+//! ```rust
+//! extern crate self;
+//! extern crate std;
+//! extern crate core;
+//! extern crate alloc;
+//! extern crate proc_macro;
+//! extern crate test;
+//! extern crate Krate;
+//! ```
 mod outline_module;
 
 /// ```
@@ -1084,6 +1082,9 @@ pub struct Struct;
     );
 }
 
+// Rainbow highlighting uses a deterministic hash (fxhash) but the hashing does differ
+// depending on the pointer width so only runs this on 64-bit targets.
+#[cfg(target_pointer_width = "64")]
 #[test]
 fn test_rainbow_highlighting() {
     check_highlighting(
diff --git a/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs b/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs
index 66553a2661a20..be0de6c936615 100644
--- a/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs
+++ b/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs
@@ -13,15 +13,35 @@ use crate::{
 
 macro_rules! define_symbols {
     (@WITH_NAME: $($alias:ident = $value:literal,)* @PLAIN: $($name:ident,)*) => {
-        // Ideally we would be emitting `const` here, but then we no longer have stable addresses
-        // which is what we are relying on for equality! In the future if consts can refer to
-        // statics we should swap these for `const`s and have the string literal being pointed
-        // to be statics to refer to such that their address is stable.
+        // We define symbols as both `const`s and `static`s because some const code requires const symbols,
+        // but code from before the transition relies on the lifetime of the predefined symbols and making them
+        // `const`s make it error (because now they're temporaries). In the future we probably should only
+        // use consts.
+
+        /// Predefined symbols as `const`s (instead of the default `static`s).
+        pub mod consts {
+            use super::{Symbol, TaggedArcPtr};
+
+            // The strings should be in `static`s so that symbol equality holds.
+            $(
+                pub const $name: Symbol = {
+                    static SYMBOL_STR: &str = stringify!($name);
+                    Symbol { repr: TaggedArcPtr::non_arc(&SYMBOL_STR) }
+                };
+            )*
+            $(
+                pub const $alias: Symbol = {
+                    static SYMBOL_STR: &str = $value;
+                    Symbol { repr: TaggedArcPtr::non_arc(&SYMBOL_STR) }
+                };
+            )*
+        }
+
         $(
-            pub static $name: Symbol = Symbol { repr: TaggedArcPtr::non_arc(&stringify!($name)) };
+            pub static $name: Symbol = consts::$name;
         )*
         $(
-            pub static $alias: Symbol = Symbol { repr: TaggedArcPtr::non_arc(&$value) };
+            pub static $alias: Symbol = consts::$alias;
         )*
 
 
@@ -428,6 +448,7 @@ define_symbols! {
     rustc_layout_scalar_valid_range_start,
     rustc_legacy_const_generics,
     rustc_macro_transparency,
+    rustc_paren_sugar,
     rustc_reallocator,
     rustc_reservation_impl,
     rustc_safe_intrinsic,
diff --git a/src/tools/rust-analyzer/crates/load-cargo/src/lib.rs b/src/tools/rust-analyzer/crates/load-cargo/src/lib.rs
index 5654c04a59287..67ee9d1119971 100644
--- a/src/tools/rust-analyzer/crates/load-cargo/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/load-cargo/src/lib.rs
@@ -94,7 +94,9 @@ pub fn load_workspace(
             let contents = loader.load_sync(path);
             let path = vfs::VfsPath::from(path.to_path_buf());
             vfs.set_file_contents(path.clone(), contents);
-            vfs.file_id(&path)
+            vfs.file_id(&path).and_then(|(file_id, excluded)| {
+                (excluded == vfs::FileExcluded::No).then_some(file_id)
+            })
         },
         extra_env,
     );
diff --git a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
index e4a6113462054..b5f4e43a115d7 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
@@ -277,6 +277,9 @@ impl CargoWorkspace {
     /// Fetches the metadata for the given `cargo_toml` manifest.
     /// A successful result may contain another metadata error if the initial fetching failed but
     /// the `--no-deps` retry succeeded.
+    ///
+    /// The sysroot is used to set the `RUSTUP_TOOLCHAIN` env var when invoking cargo
+    /// to ensure that the rustup proxy uses the correct toolchain.
     pub fn fetch_metadata(
         cargo_toml: &ManifestPath,
         current_dir: &AbsPath,
diff --git a/src/tools/rust-analyzer/crates/project-model/src/lib.rs b/src/tools/rust-analyzer/crates/project-model/src/lib.rs
index fc1fd7b877fcc..0c73447468241 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/lib.rs
@@ -260,19 +260,19 @@ fn parse_cfg(s: &str) -> Result<cfg::CfgAtom, String> {
 }
 
 #[derive(Clone, Debug, PartialEq, Eq)]
-pub enum SysrootSourceWorkspaceConfig {
+pub enum RustSourceWorkspaceConfig {
     CargoMetadata(CargoMetadataConfig),
     Stitched,
 }
 
-impl Default for SysrootSourceWorkspaceConfig {
+impl Default for RustSourceWorkspaceConfig {
     fn default() -> Self {
-        SysrootSourceWorkspaceConfig::default_cargo()
+        RustSourceWorkspaceConfig::default_cargo()
     }
 }
 
-impl SysrootSourceWorkspaceConfig {
+impl RustSourceWorkspaceConfig {
     pub fn default_cargo() -> Self {
-        SysrootSourceWorkspaceConfig::CargoMetadata(Default::default())
+        RustSourceWorkspaceConfig::CargoMetadata(Default::default())
     }
 }
diff --git a/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs b/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
index 8f633d24be9a2..544ba43ba66f3 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
@@ -22,38 +22,40 @@ use toolchain::{probe_for_binary, Tool};
 
 use crate::{
     cargo_workspace::CargoMetadataConfig, utf8_stdout, CargoWorkspace, ManifestPath,
-    SysrootSourceWorkspaceConfig,
+    RustSourceWorkspaceConfig,
 };
 
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Sysroot {
     root: Option<AbsPathBuf>,
-    src_root: Option<AbsPathBuf>,
-    workspace: SysrootWorkspace,
+    rust_lib_src_root: Option<AbsPathBuf>,
+    workspace: RustLibSrcWorkspace,
     error: Option<String>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq)]
-pub(crate) enum SysrootWorkspace {
+pub enum RustLibSrcWorkspace {
     Workspace(CargoWorkspace),
     Stitched(Stitched),
     Empty,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq)]
-pub(crate) struct Stitched {
-    crates: Arena<SysrootCrateData>,
+pub struct Stitched {
+    crates: Arena<RustLibSrcCrateData>,
 }
 
-impl ops::Index<SysrootCrate> for Stitched {
-    type Output = SysrootCrateData;
-    fn index(&self, index: SysrootCrate) -> &SysrootCrateData {
+impl ops::Index<RustLibSrcCrate> for Stitched {
+    type Output = RustLibSrcCrateData;
+    fn index(&self, index: RustLibSrcCrate) -> &RustLibSrcCrateData {
         &self.crates[index]
     }
 }
 
 impl Stitched {
-    pub(crate) fn public_deps(&self) -> impl Iterator<Item = (CrateName, SysrootCrate, bool)> + '_ {
+    pub(crate) fn public_deps(
+        &self,
+    ) -> impl Iterator<Item = (CrateName, RustLibSrcCrate, bool)> + '_ {
         // core is added as a dependency before std in order to
         // mimic rustcs dependency order
         [("core", true), ("alloc", false), ("std", true), ("test", false)].into_iter().filter_map(
@@ -63,32 +65,37 @@ impl Stitched {
         )
     }
 
-    pub(crate) fn proc_macro(&self) -> Option<SysrootCrate> {
+    pub(crate) fn proc_macro(&self) -> Option<RustLibSrcCrate> {
         self.by_name("proc_macro")
     }
 
-    pub(crate) fn crates(&self) -> impl ExactSizeIterator<Item = SysrootCrate> + '_ {
+    pub(crate) fn crates(&self) -> impl ExactSizeIterator<Item = RustLibSrcCrate> + '_ {
         self.crates.iter().map(|(id, _data)| id)
     }
 
-    fn by_name(&self, name: &str) -> Option<SysrootCrate> {
+    fn by_name(&self, name: &str) -> Option<RustLibSrcCrate> {
         let (id, _data) = self.crates.iter().find(|(_id, data)| data.name == name)?;
         Some(id)
     }
 }
 
-pub(crate) type SysrootCrate = Idx<SysrootCrateData>;
+pub(crate) type RustLibSrcCrate = Idx<RustLibSrcCrateData>;
 
 #[derive(Debug, Clone, Eq, PartialEq)]
-pub(crate) struct SysrootCrateData {
+pub(crate) struct RustLibSrcCrateData {
     pub(crate) name: String,
     pub(crate) root: ManifestPath,
-    pub(crate) deps: Vec<SysrootCrate>,
+    pub(crate) deps: Vec<RustLibSrcCrate>,
 }
 
 impl Sysroot {
     pub const fn empty() -> Sysroot {
-        Sysroot { root: None, src_root: None, workspace: SysrootWorkspace::Empty, error: None }
+        Sysroot {
+            root: None,
+            rust_lib_src_root: None,
+            workspace: RustLibSrcWorkspace::Empty,
+            error: None,
+        }
     }
 
     /// Returns sysroot "root" directory, where `bin/`, `etc/`, `lib/`, `libexec/`
@@ -100,15 +107,15 @@ impl Sysroot {
 
     /// Returns the sysroot "source" directory, where stdlib sources are located, like:
     /// `$HOME/.rustup/toolchains/nightly-2022-07-23-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library`
-    pub fn src_root(&self) -> Option<&AbsPath> {
-        self.src_root.as_deref()
+    pub fn rust_lib_src_root(&self) -> Option<&AbsPath> {
+        self.rust_lib_src_root.as_deref()
     }
 
-    pub fn is_empty(&self) -> bool {
+    pub fn is_rust_lib_src_empty(&self) -> bool {
         match &self.workspace {
-            SysrootWorkspace::Workspace(ws) => ws.packages().next().is_none(),
-            SysrootWorkspace::Stitched(stitched) => stitched.crates.is_empty(),
-            SysrootWorkspace::Empty => true,
+            RustLibSrcWorkspace::Workspace(ws) => ws.packages().next().is_none(),
+            RustLibSrcWorkspace::Stitched(stitched) => stitched.crates.is_empty(),
+            RustLibSrcWorkspace::Empty => true,
         }
     }
 
@@ -118,13 +125,13 @@ impl Sysroot {
 
     pub fn num_packages(&self) -> usize {
         match &self.workspace {
-            SysrootWorkspace::Workspace(ws) => ws.packages().count(),
-            SysrootWorkspace::Stitched(c) => c.crates().count(),
-            SysrootWorkspace::Empty => 0,
+            RustLibSrcWorkspace::Workspace(ws) => ws.packages().count(),
+            RustLibSrcWorkspace::Stitched(c) => c.crates().count(),
+            RustLibSrcWorkspace::Empty => 0,
         }
     }
 
-    pub(crate) fn workspace(&self) -> &SysrootWorkspace {
+    pub(crate) fn workspace(&self) -> &RustLibSrcWorkspace {
         &self.workspace
     }
 }
@@ -133,33 +140,33 @@ impl Sysroot {
     /// Attempts to discover the toolchain's sysroot from the given `dir`.
     pub fn discover(dir: &AbsPath, extra_env: &FxHashMap<String, String>) -> Sysroot {
         let sysroot_dir = discover_sysroot_dir(dir, extra_env);
-        let sysroot_src_dir = sysroot_dir.as_ref().ok().map(|sysroot_dir| {
-            discover_sysroot_src_dir_or_add_component(sysroot_dir, dir, extra_env)
+        let rust_lib_src_dir = sysroot_dir.as_ref().ok().map(|sysroot_dir| {
+            discover_rust_lib_src_dir_or_add_component(sysroot_dir, dir, extra_env)
         });
-        Sysroot::assemble(Some(sysroot_dir), sysroot_src_dir)
+        Sysroot::assemble(Some(sysroot_dir), rust_lib_src_dir)
     }
 
     pub fn discover_with_src_override(
         current_dir: &AbsPath,
         extra_env: &FxHashMap<String, String>,
-        sysroot_src_dir: AbsPathBuf,
+        rust_lib_src_dir: AbsPathBuf,
     ) -> Sysroot {
         let sysroot_dir = discover_sysroot_dir(current_dir, extra_env);
-        Sysroot::assemble(Some(sysroot_dir), Some(Ok(sysroot_src_dir)))
+        Sysroot::assemble(Some(sysroot_dir), Some(Ok(rust_lib_src_dir)))
     }
 
-    pub fn discover_sysroot_src_dir(sysroot_dir: AbsPathBuf) -> Sysroot {
-        let sysroot_src_dir = discover_sysroot_src_dir(&sysroot_dir)
+    pub fn discover_rust_lib_src_dir(sysroot_dir: AbsPathBuf) -> Sysroot {
+        let rust_lib_src_dir = discover_rust_lib_src_dir(&sysroot_dir)
             .ok_or_else(|| format_err!("can't find standard library sources in {sysroot_dir}"));
-        Sysroot::assemble(Some(Ok(sysroot_dir)), Some(sysroot_src_dir))
+        Sysroot::assemble(Some(Ok(sysroot_dir)), Some(rust_lib_src_dir))
     }
 
     pub fn discover_rustc_src(&self) -> Option<ManifestPath> {
         get_rustc_src(self.root()?)
     }
 
-    pub fn new(sysroot_dir: Option<AbsPathBuf>, sysroot_src_dir: Option<AbsPathBuf>) -> Sysroot {
-        Self::assemble(sysroot_dir.map(Ok), sysroot_src_dir.map(Ok))
+    pub fn new(sysroot_dir: Option<AbsPathBuf>, rust_lib_src_dir: Option<AbsPathBuf>) -> Sysroot {
+        Self::assemble(sysroot_dir.map(Ok), rust_lib_src_dir.map(Ok))
     }
 
     /// Returns a command to run a tool preferring the cargo proxies if the sysroot exists.
@@ -200,7 +207,7 @@ impl Sysroot {
 
     fn assemble(
         sysroot_dir: Option<Result<AbsPathBuf, anyhow::Error>>,
-        sysroot_src_dir: Option<Result<AbsPathBuf, anyhow::Error>>,
+        rust_lib_src_dir: Option<Result<AbsPathBuf, anyhow::Error>>,
     ) -> Sysroot {
         let mut errors = String::new();
         let root = match sysroot_dir {
@@ -211,8 +218,8 @@ impl Sysroot {
             }
             None => None,
         };
-        let src_root = match sysroot_src_dir {
-            Some(Ok(sysroot_src_dir)) => Some(sysroot_src_dir),
+        let rust_lib_src_root = match rust_lib_src_dir {
+            Some(Ok(rust_lib_src_dir)) => Some(rust_lib_src_dir),
             Some(Err(e)) => {
                 format_to!(errors, "{e}\n");
                 None
@@ -221,24 +228,28 @@ impl Sysroot {
         };
         Sysroot {
             root,
-            src_root,
-            workspace: SysrootWorkspace::Empty,
+            rust_lib_src_root,
+            workspace: RustLibSrcWorkspace::Empty,
             error: errors.is_empty().not().then_some(errors),
         }
     }
 
-    pub fn load_workspace(&mut self, sysroot_source_config: &SysrootSourceWorkspaceConfig) {
-        assert!(matches!(self.workspace, SysrootWorkspace::Empty), "workspace already loaded");
-        let Self { root: _, src_root: Some(src_root), workspace, error: _ } = self else { return };
-        if let SysrootSourceWorkspaceConfig::CargoMetadata(cargo_config) = sysroot_source_config {
+    pub fn load_workspace(
+        &self,
+        sysroot_source_config: &RustSourceWorkspaceConfig,
+    ) -> Option<RustLibSrcWorkspace> {
+        assert!(matches!(self.workspace, RustLibSrcWorkspace::Empty), "workspace already loaded");
+        let Self { root: _, rust_lib_src_root: Some(src_root), workspace: _, error: _ } = self
+        else {
+            return None;
+        };
+        if let RustSourceWorkspaceConfig::CargoMetadata(cargo_config) = sysroot_source_config {
             let library_manifest = ManifestPath::try_from(src_root.join("Cargo.toml")).unwrap();
             if fs::metadata(&library_manifest).is_ok() {
                 if let Some(loaded) =
-                    Self::load_library_via_cargo(library_manifest, src_root, cargo_config)
+                    self.load_library_via_cargo(library_manifest, src_root, cargo_config)
                 {
-                    *workspace = loaded;
-                    self.load_core_check();
-                    return;
+                    return Some(loaded);
                 }
             }
         }
@@ -255,7 +266,7 @@ impl Sysroot {
                 .find(|it| fs::metadata(it).is_ok());
 
             if let Some(root) = root {
-                stitched.crates.alloc(SysrootCrateData {
+                stitched.crates.alloc(RustLibSrcCrateData {
                     name: name.into(),
                     root,
                     deps: Vec::new(),
@@ -286,21 +297,23 @@ impl Sysroot {
                 }
             }
         }
-        *workspace = SysrootWorkspace::Stitched(stitched);
-        self.load_core_check();
+        Some(RustLibSrcWorkspace::Stitched(stitched))
     }
 
-    fn load_core_check(&mut self) {
+    pub fn set_workspace(&mut self, workspace: RustLibSrcWorkspace) {
+        self.workspace = workspace;
         if self.error.is_none() {
-            if let Some(src_root) = &self.src_root {
+            if let Some(src_root) = &self.rust_lib_src_root {
                 let has_core = match &self.workspace {
-                    SysrootWorkspace::Workspace(ws) => ws.packages().any(|p| ws[p].name == "core"),
-                    SysrootWorkspace::Stitched(stitched) => stitched.by_name("core").is_some(),
-                    SysrootWorkspace::Empty => true,
+                    RustLibSrcWorkspace::Workspace(ws) => {
+                        ws.packages().any(|p| ws[p].name == "core")
+                    }
+                    RustLibSrcWorkspace::Stitched(stitched) => stitched.by_name("core").is_some(),
+                    RustLibSrcWorkspace::Empty => true,
                 };
                 if !has_core {
-                    let var_note = if env::var_os("RUST_SRC_PATH").is_some() {
-                        " (env var `RUST_SRC_PATH` is set and may be incorrect, try unsetting it)"
+                    let var_note = if env::var_os("rust_lib_src_PATH").is_some() {
+                        " (env var `rust_lib_src_PATH` is set and may be incorrect, try unsetting it)"
                     } else {
                         ", try running `rustup component add rust-src` to possibly fix this"
                     };
@@ -313,10 +326,11 @@ impl Sysroot {
     }
 
     fn load_library_via_cargo(
+        &self,
         library_manifest: ManifestPath,
-        sysroot_src_dir: &AbsPathBuf,
+        rust_lib_src_dir: &AbsPathBuf,
         cargo_config: &CargoMetadataConfig,
-    ) -> Option<SysrootWorkspace> {
+    ) -> Option<RustLibSrcWorkspace> {
         tracing::debug!("Loading library metadata: {library_manifest}");
         let mut cargo_config = cargo_config.clone();
         // the sysroot uses `public-dependency`, so we make cargo think it's a nightly
@@ -327,9 +341,9 @@ impl Sysroot {
 
         let (mut res, _) = match CargoWorkspace::fetch_metadata(
             &library_manifest,
-            sysroot_src_dir,
+            rust_lib_src_dir,
             &cargo_config,
-            &Sysroot::empty(),
+            self,
             // Make sure we never attempt to write to the sysroot
             true,
             &|_| (),
@@ -391,7 +405,7 @@ impl Sysroot {
         });
 
         let cargo_workspace = CargoWorkspace::new(res, library_manifest, Default::default());
-        Some(SysrootWorkspace::Workspace(cargo_workspace))
+        Some(RustLibSrcWorkspace::Workspace(cargo_workspace))
     }
 }
 
@@ -407,36 +421,38 @@ fn discover_sysroot_dir(
     Ok(AbsPathBuf::assert(Utf8PathBuf::from(stdout)))
 }
 
-fn discover_sysroot_src_dir(sysroot_path: &AbsPathBuf) -> Option<AbsPathBuf> {
-    if let Ok(path) = env::var("RUST_SRC_PATH") {
+fn discover_rust_lib_src_dir(sysroot_path: &AbsPathBuf) -> Option<AbsPathBuf> {
+    if let Ok(path) = env::var("rust_lib_src_PATH") {
         if let Ok(path) = AbsPathBuf::try_from(path.as_str()) {
             let core = path.join("core");
             if fs::metadata(&core).is_ok() {
-                tracing::debug!("Discovered sysroot by RUST_SRC_PATH: {path}");
+                tracing::debug!("Discovered sysroot by rust_lib_src_PATH: {path}");
                 return Some(path);
             }
-            tracing::debug!("RUST_SRC_PATH is set, but is invalid (no core: {core:?}), ignoring");
+            tracing::debug!(
+                "rust_lib_src_PATH is set, but is invalid (no core: {core:?}), ignoring"
+            );
         } else {
-            tracing::debug!("RUST_SRC_PATH is set, but is invalid, ignoring");
+            tracing::debug!("rust_lib_src_PATH is set, but is invalid, ignoring");
         }
     }
 
-    get_rust_src(sysroot_path)
+    get_rust_lib_src(sysroot_path)
 }
 
-fn discover_sysroot_src_dir_or_add_component(
+fn discover_rust_lib_src_dir_or_add_component(
     sysroot_path: &AbsPathBuf,
     current_dir: &AbsPath,
     extra_env: &FxHashMap<String, String>,
 ) -> Result<AbsPathBuf> {
-    discover_sysroot_src_dir(sysroot_path)
+    discover_rust_lib_src_dir(sysroot_path)
         .or_else(|| {
             let mut rustup = toolchain::command(Tool::Rustup.prefer_proxy(), current_dir);
             rustup.envs(extra_env);
             rustup.args(["component", "add", "rust-src"]);
             tracing::info!("adding rust-src component by {:?}", rustup);
             utf8_stdout(&mut rustup).ok()?;
-            get_rust_src(sysroot_path)
+            get_rust_lib_src(sysroot_path)
         })
         .ok_or_else(|| {
             tracing::error!(%sysroot_path, "can't load standard library, try installing `rust-src`");
@@ -461,11 +477,11 @@ fn get_rustc_src(sysroot_path: &AbsPath) -> Option<ManifestPath> {
     }
 }
 
-fn get_rust_src(sysroot_path: &AbsPath) -> Option<AbsPathBuf> {
-    let rust_src = sysroot_path.join("lib/rustlib/src/rust/library");
-    tracing::debug!("checking sysroot library: {rust_src}");
-    if fs::metadata(&rust_src).is_ok() {
-        Some(rust_src)
+fn get_rust_lib_src(sysroot_path: &AbsPath) -> Option<AbsPathBuf> {
+    let rust_lib_src = sysroot_path.join("lib/rustlib/src/rust/library");
+    tracing::debug!("checking sysroot library: {rust_lib_src}");
+    if fs::metadata(&rust_lib_src).is_ok() {
+        Some(rust_lib_src)
     } else {
         None
     }
diff --git a/src/tools/rust-analyzer/crates/project-model/src/tests.rs b/src/tools/rust-analyzer/crates/project-model/src/tests.rs
index 2856086543666..54eb0e3478a75 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/tests.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/tests.rs
@@ -12,9 +12,9 @@ use span::FileId;
 use triomphe::Arc;
 
 use crate::{
-    sysroot::SysrootWorkspace, workspace::ProjectWorkspaceKind, CargoWorkspace, CfgOverrides,
-    ManifestPath, ProjectJson, ProjectJsonData, ProjectWorkspace, Sysroot,
-    SysrootSourceWorkspaceConfig, WorkspaceBuildScripts,
+    sysroot::RustLibSrcWorkspace, workspace::ProjectWorkspaceKind, CargoWorkspace, CfgOverrides,
+    ManifestPath, ProjectJson, ProjectJsonData, ProjectWorkspace, RustSourceWorkspaceConfig,
+    Sysroot, WorkspaceBuildScripts,
 };
 
 fn load_cargo(file: &str) -> (CrateGraph, ProcMacroPaths) {
@@ -42,7 +42,6 @@ fn load_workspace_from_metadata(file: &str) -> ProjectWorkspace {
             build_scripts: WorkspaceBuildScripts::default(),
             rustc: Err(None),
             error: None,
-            set_test: true,
         },
         cfg_overrides: Default::default(),
         sysroot: Sysroot::empty(),
@@ -50,6 +49,7 @@ fn load_workspace_from_metadata(file: &str) -> ProjectWorkspace {
         toolchain: None,
         target_layout: Err("target_data_layout not loaded".into()),
         extra_includes: Vec::new(),
+        set_test: true,
     }
 }
 
@@ -65,6 +65,7 @@ fn load_rust_project(file: &str) -> (CrateGraph, ProcMacroPaths) {
         target_layout: Err(Arc::from("test has no data layout")),
         cfg_overrides: Default::default(),
         extra_includes: Vec::new(),
+        set_test: true,
     };
     to_crate_graph(project_workspace, &mut Default::default())
 }
@@ -125,7 +126,10 @@ fn get_fake_sysroot() -> Sysroot {
     let sysroot_dir = AbsPathBuf::assert(sysroot_path);
     let sysroot_src_dir = sysroot_dir.clone();
     let mut sysroot = Sysroot::new(Some(sysroot_dir), Some(sysroot_src_dir));
-    sysroot.load_workspace(&SysrootSourceWorkspaceConfig::default_cargo());
+    let loaded_sysroot = sysroot.load_workspace(&RustSourceWorkspaceConfig::default_cargo());
+    if let Some(loaded_sysroot) = loaded_sysroot {
+        sysroot.set_workspace(loaded_sysroot);
+    }
     sysroot
 }
 
@@ -271,15 +275,17 @@ fn smoke_test_real_sysroot_cargo() {
         AbsPath::assert(Utf8Path::new(env!("CARGO_MANIFEST_DIR"))),
         &Default::default(),
     );
-    sysroot.load_workspace(&SysrootSourceWorkspaceConfig::default_cargo());
-    assert!(matches!(sysroot.workspace(), SysrootWorkspace::Workspace(_)));
+    let loaded_sysroot = sysroot.load_workspace(&RustSourceWorkspaceConfig::default_cargo());
+    if let Some(loaded_sysroot) = loaded_sysroot {
+        sysroot.set_workspace(loaded_sysroot);
+    }
+    assert!(matches!(sysroot.workspace(), RustLibSrcWorkspace::Workspace(_)));
     let project_workspace = ProjectWorkspace {
         kind: ProjectWorkspaceKind::Cargo {
             cargo: cargo_workspace,
             build_scripts: WorkspaceBuildScripts::default(),
             rustc: Err(None),
             error: None,
-            set_test: true,
         },
         sysroot,
         rustc_cfg: Vec::new(),
@@ -287,6 +293,7 @@ fn smoke_test_real_sysroot_cargo() {
         toolchain: None,
         target_layout: Err("target_data_layout not loaded".into()),
         extra_includes: Vec::new(),
+        set_test: true,
     };
     project_workspace.to_crate_graph(
         &mut {
diff --git a/src/tools/rust-analyzer/crates/project-model/src/workspace.rs b/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
index dcd62753cb2f9..f5d46daa80fab 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
@@ -2,7 +2,7 @@
 //! metadata` or `rust-project.json`) into representation stored in the salsa
 //! database -- `CrateGraph`.
 
-use std::{collections::VecDeque, fmt, fs, iter, ops::Deref, sync};
+use std::{collections::VecDeque, fmt, fs, iter, ops::Deref, sync, thread};
 
 use anyhow::Context;
 use base_db::{
@@ -23,10 +23,10 @@ use crate::{
     cargo_workspace::{CargoMetadataConfig, DepKind, PackageData, RustLibSource},
     env::{cargo_config_env, inject_cargo_env, inject_cargo_package_env, inject_rustc_tool_env},
     project_json::{Crate, CrateArrayIdx},
-    sysroot::{SysrootCrate, SysrootWorkspace},
+    sysroot::{RustLibSrcCrate, RustLibSrcWorkspace},
     toolchain_info::{rustc_cfg, target_data_layout, target_tuple, version, QueryConfig},
     CargoConfig, CargoWorkspace, CfgOverrides, InvocationStrategy, ManifestPath, Package,
-    ProjectJson, ProjectManifest, Sysroot, SysrootSourceWorkspaceConfig, TargetData, TargetKind,
+    ProjectJson, ProjectManifest, RustSourceWorkspaceConfig, Sysroot, TargetData, TargetKind,
     WorkspaceBuildScripts,
 };
 use tracing::{debug, error, info};
@@ -64,6 +64,8 @@ pub struct ProjectWorkspace {
     pub cfg_overrides: CfgOverrides,
     /// Additional includes to add for the VFS.
     pub extra_includes: Vec<AbsPathBuf>,
+    /// Set `cfg(test)` for local crates
+    pub set_test: bool,
 }
 
 #[derive(Clone)]
@@ -79,7 +81,6 @@ pub enum ProjectWorkspaceKind {
         /// The rustc workspace loaded for this workspace. An `Err(None)` means loading has been
         /// disabled or was otherwise not requested.
         rustc: Result<Box<(CargoWorkspace, WorkspaceBuildScripts)>, Option<String>>,
-        set_test: bool,
     },
     /// Project workspace was specified using a `rust-project.json` file.
     Json(ProjectJson),
@@ -98,7 +99,6 @@ pub enum ProjectWorkspaceKind {
         file: ManifestPath,
         /// Is this file a cargo script file?
         cargo: Option<(CargoWorkspace, WorkspaceBuildScripts, Option<Arc<anyhow::Error>>)>,
-        set_test: bool,
     },
 }
 
@@ -113,9 +113,10 @@ impl fmt::Debug for ProjectWorkspace {
             target_layout,
             cfg_overrides,
             extra_includes,
+            set_test,
         } = self;
         match kind {
-            ProjectWorkspaceKind::Cargo { cargo, error: _, build_scripts, rustc, set_test } => f
+            ProjectWorkspaceKind::Cargo { cargo, error: _, build_scripts, rustc } => f
                 .debug_struct("Cargo")
                 .field("root", &cargo.workspace_root().file_name())
                 .field("n_packages", &cargo.packages().len())
@@ -141,11 +142,12 @@ impl fmt::Debug for ProjectWorkspace {
                     .field("toolchain", &toolchain)
                     .field("data_layout", &target_layout)
                     .field("n_cfg_overrides", &cfg_overrides.len())
-                    .field("n_extra_includes", &extra_includes.len());
+                    .field("n_extra_includes", &extra_includes.len())
+                    .field("set_test", set_test);
 
                 debug_struct.finish()
             }
-            ProjectWorkspaceKind::DetachedFile { file, cargo: cargo_script, set_test } => f
+            ProjectWorkspaceKind::DetachedFile { file, cargo: cargo_script } => f
                 .debug_struct("DetachedFiles")
                 .field("file", &file)
                 .field("cargo_script", &cargo_script.is_some())
@@ -186,7 +188,7 @@ impl ProjectWorkspace {
                 let project_location = project_json.parent().to_path_buf();
                 let project_json: ProjectJson =
                     ProjectJson::new(Some(project_json.clone()), &project_location, data);
-                ProjectWorkspace::load_inline(project_json, config)
+                ProjectWorkspace::load_inline(project_json, config, progress)
             }
             ProjectManifest::CargoScript(rust_file) => {
                 ProjectWorkspace::load_detached_file(rust_file, config)?
@@ -204,19 +206,33 @@ impl ProjectWorkspace {
         config: &CargoConfig,
         progress: &dyn Fn(String),
     ) -> Result<ProjectWorkspace, anyhow::Error> {
-        let mut sysroot = match (&config.sysroot, &config.sysroot_src) {
+        progress("Discovering sysroot".to_owned());
+        let CargoConfig {
+            features,
+            rustc_source,
+            extra_args,
+            extra_env,
+            set_test,
+            cfg_overrides,
+            extra_includes,
+            sysroot,
+            sysroot_src,
+            target,
+            ..
+        } = config;
+        let mut sysroot = match (sysroot, sysroot_src) {
             (Some(RustLibSource::Discover), None) => {
-                Sysroot::discover(cargo_toml.parent(), &config.extra_env)
+                Sysroot::discover(cargo_toml.parent(), extra_env)
             }
             (Some(RustLibSource::Discover), Some(sysroot_src)) => {
                 Sysroot::discover_with_src_override(
                     cargo_toml.parent(),
-                    &config.extra_env,
+                    extra_env,
                     sysroot_src.clone(),
                 )
             }
             (Some(RustLibSource::Path(path)), None) => {
-                Sysroot::discover_sysroot_src_dir(path.clone())
+                Sysroot::discover_rust_lib_src_dir(path.clone())
             }
             (Some(RustLibSource::Path(sysroot)), Some(sysroot_src)) => {
                 Sysroot::new(Some(sysroot.clone()), Some(sysroot_src.clone()))
@@ -224,100 +240,147 @@ impl ProjectWorkspace {
             (None, _) => Sysroot::empty(),
         };
 
-        let rustc_dir = match &config.rustc_source {
-            Some(RustLibSource::Path(path)) => ManifestPath::try_from(path.clone())
-                .map_err(|p| Some(format!("rustc source path is not absolute: {p}"))),
-            Some(RustLibSource::Discover) => sysroot
-                .discover_rustc_src()
-                .ok_or_else(|| Some("Failed to discover rustc source for sysroot.".to_owned())),
-            None => Err(None),
-        };
-
-        tracing::info!(workspace = %cargo_toml, src_root = ?sysroot.src_root(), root = ?sysroot.root(), "Using sysroot");
+        tracing::info!(workspace = %cargo_toml, src_root = ?sysroot.rust_lib_src_root(), root = ?sysroot.root(), "Using sysroot");
+        progress("Querying project metadata".to_owned());
         let toolchain_config = QueryConfig::Cargo(&sysroot, cargo_toml);
         let targets =
-            target_tuple::get(toolchain_config, config.target.as_deref(), &config.extra_env)
-                .unwrap_or_default();
-        let toolchain = version::get(toolchain_config, &config.extra_env)
-            .inspect_err(|e| {
-                tracing::error!(%e,
-                    "failed fetching toolchain version for {cargo_toml:?} workspace"
-                )
-            })
-            .ok()
-            .flatten();
-        let rustc_cfg =
-            rustc_cfg::get(toolchain_config, targets.first().map(Deref::deref), &config.extra_env);
-        let cfg_overrides = config.cfg_overrides.clone();
-        let data_layout = target_data_layout::get(
-            toolchain_config,
-            targets.first().map(Deref::deref),
-            &config.extra_env,
-        );
-        if let Err(e) = &data_layout {
-            tracing::error!(%e, "failed fetching data layout for {cargo_toml:?} workspace");
-        }
-        sysroot.load_workspace(&SysrootSourceWorkspaceConfig::CargoMetadata(
-            sysroot_metadata_config(&config.extra_env, &targets),
-        ));
+            target_tuple::get(toolchain_config, target.as_deref(), extra_env).unwrap_or_default();
+
+        // We spawn a bunch of processes to query various information about the workspace's
+        // toolchain and sysroot
+        // We can speed up loading a bit by spawning all of these processes in parallel (especially
+        // on systems were process spawning is delayed)
+        let join = thread::scope(|s| {
+            let workspace_dir = cargo_toml.parent();
+            let toolchain = s.spawn(|| {
+                version::get(toolchain_config, extra_env)
+                    .inspect_err(|e| {
+                        tracing::error!(%e,
+                            "failed fetching toolchain version for {cargo_toml:?} workspace"
+                        )
+                    })
+                    .ok()
+                    .flatten()
+            });
 
-        let rustc = rustc_dir.and_then(|rustc_dir| {
-            info!(workspace = %cargo_toml, rustc_dir = %rustc_dir, "Using rustc source");
-            match CargoWorkspace::fetch_metadata(
-                &rustc_dir,
-                cargo_toml.parent(),
-                &CargoMetadataConfig {
-                    features: crate::CargoFeatures::default(),
-                    targets: targets.clone(),
-                    extra_args: config.extra_args.clone(),
-                    extra_env: config.extra_env.clone(),
-                },
-                &sysroot,
-                false,
-                progress,
-            ) {
-                Ok((meta, _error)) => {
-                    let workspace = CargoWorkspace::new(meta, cargo_toml.clone(), Env::default());
-                    let build_scripts = WorkspaceBuildScripts::rustc_crates(
-                        &workspace,
-                        cargo_toml.parent(),
-                        &config.extra_env,
+            let rustc_cfg = s.spawn(|| {
+                rustc_cfg::get(toolchain_config, targets.first().map(Deref::deref), extra_env)
+            });
+            let data_layout = s.spawn(|| {
+                target_data_layout::get(
+                    toolchain_config,
+                    targets.first().map(Deref::deref),
+                    extra_env,
+                ).inspect_err(|e| {
+                    tracing::error!(%e, "failed fetching data layout for {cargo_toml:?} workspace")
+                })
+            });
+
+            let rustc_dir = s.spawn(|| {
+                let rustc_dir = match rustc_source {
+                    Some(RustLibSource::Path(path)) => ManifestPath::try_from(path.clone())
+                        .map_err(|p| Some(format!("rustc source path is not absolute: {p}"))),
+                    Some(RustLibSource::Discover) => {
+                        sysroot.discover_rustc_src().ok_or_else(|| {
+                            Some("Failed to discover rustc source for sysroot.".to_owned())
+                        })
+                    }
+                    None => Err(None),
+                };
+                rustc_dir.and_then(|rustc_dir| {
+                    info!(workspace = %cargo_toml, rustc_dir = %rustc_dir, "Using rustc source");
+                    match CargoWorkspace::fetch_metadata(
+                        &rustc_dir,
+                        workspace_dir,
+                        &CargoMetadataConfig {
+                            features: crate::CargoFeatures::default(),
+                            targets: targets.clone(),
+                            extra_args: extra_args.clone(),
+                            extra_env: extra_env.clone(),
+                        },
                         &sysroot,
-                    );
-                    Ok(Box::new((workspace, build_scripts)))
-                }
-                Err(e) => {
-                    tracing::error!(
-                        %e,
-                        "Failed to read Cargo metadata from rustc source at {rustc_dir}",
-                    );
-                    Err(Some(format!(
-                        "Failed to read Cargo metadata from rustc source at {rustc_dir}: {e}"
-                    )))
-                }
-            }
+                        false,
+                        &|_| (),
+                    ) {
+                        Ok((meta, _error)) => {
+                            let workspace =
+                                CargoWorkspace::new(meta, cargo_toml.clone(), Env::default());
+                            let build_scripts = WorkspaceBuildScripts::rustc_crates(
+                                &workspace,
+                                workspace_dir,
+                                extra_env,
+                                &sysroot,
+                            );
+                            Ok(Box::new((workspace, build_scripts)))
+                        }
+                        Err(e) => {
+                            tracing::error!(
+                                %e,
+                                "Failed to read Cargo metadata from rustc source at {rustc_dir}",
+                            );
+                            Err(Some(format!(
+                            "Failed to read Cargo metadata from rustc source at {rustc_dir}: {e}"
+                        )))
+                        }
+                    }
+                })
+            });
+
+            let cargo_metadata = s.spawn(|| {
+                CargoWorkspace::fetch_metadata(
+                    cargo_toml,
+                    workspace_dir,
+                    &CargoMetadataConfig {
+                        features: features.clone(),
+                        targets: targets.clone(),
+                        extra_args: extra_args.clone(),
+                        extra_env: extra_env.clone(),
+                    },
+                    &sysroot,
+                    false,
+                    &|_| (),
+                )
+            });
+            let loaded_sysroot = s.spawn(|| {
+                sysroot.load_workspace(&RustSourceWorkspaceConfig::CargoMetadata(
+                    sysroot_metadata_config(extra_env, &targets),
+                ))
+            });
+            let cargo_config_extra_env =
+                s.spawn(|| cargo_config_env(cargo_toml, extra_env, &sysroot));
+            thread::Result::Ok((
+                toolchain.join()?,
+                rustc_cfg.join()?,
+                data_layout.join()?,
+                rustc_dir.join()?,
+                loaded_sysroot.join()?,
+                cargo_metadata.join()?,
+                cargo_config_extra_env.join()?,
+            ))
         });
 
-        let (meta, error) = CargoWorkspace::fetch_metadata(
-            cargo_toml,
-            cargo_toml.parent(),
-            &CargoMetadataConfig {
-                features: config.features.clone(),
-                targets,
-                extra_args: config.extra_args.clone(),
-                extra_env: config.extra_env.clone(),
-            },
-            &sysroot,
-            false,
-            progress,
-        )
-        .with_context(|| {
+        let (
+            toolchain,
+            rustc_cfg,
+            data_layout,
+            rustc,
+            loaded_sysroot,
+            cargo_metadata,
+            cargo_config_extra_env,
+        ) = match join {
+            Ok(it) => it,
+            Err(e) => std::panic::resume_unwind(e),
+        };
+
+        let (meta, error) = cargo_metadata.with_context(|| {
             format!(
                 "Failed to read Cargo metadata from Cargo.toml file {cargo_toml}, {toolchain:?}",
             )
         })?;
-        let cargo_config_extra_env = cargo_config_env(cargo_toml, &config.extra_env, &sysroot);
         let cargo = CargoWorkspace::new(meta, cargo_toml.clone(), cargo_config_extra_env);
+        if let Some(loaded_sysroot) = loaded_sysroot {
+            sysroot.set_workspace(loaded_sysroot);
+        }
 
         Ok(ProjectWorkspace {
             kind: ProjectWorkspaceKind::Cargo {
@@ -325,35 +388,70 @@ impl ProjectWorkspace {
                 build_scripts: WorkspaceBuildScripts::default(),
                 rustc,
                 error: error.map(Arc::new),
-                set_test: config.set_test,
             },
             sysroot,
             rustc_cfg,
-            cfg_overrides,
+            cfg_overrides: cfg_overrides.clone(),
             toolchain,
             target_layout: data_layout.map(Arc::from).map_err(|it| Arc::from(it.to_string())),
-            extra_includes: config.extra_includes.clone(),
+            extra_includes: extra_includes.clone(),
+            set_test: *set_test,
         })
     }
 
-    pub fn load_inline(project_json: ProjectJson, config: &CargoConfig) -> ProjectWorkspace {
+    pub fn load_inline(
+        project_json: ProjectJson,
+        config: &CargoConfig,
+        progress: &dyn Fn(String),
+    ) -> ProjectWorkspace {
+        progress("Discovering sysroot".to_owned());
         let mut sysroot =
             Sysroot::new(project_json.sysroot.clone(), project_json.sysroot_src.clone());
-        sysroot.load_workspace(&SysrootSourceWorkspaceConfig::Stitched);
+        let loaded_sysroot = sysroot.load_workspace(&RustSourceWorkspaceConfig::Stitched);
+        if let Some(loaded_sysroot) = loaded_sysroot {
+            sysroot.set_workspace(loaded_sysroot);
+        }
+
+        tracing::info!(workspace = %project_json.manifest_or_root(), src_root = ?sysroot.rust_lib_src_root(), root = ?sysroot.root(), "Using sysroot");
+        progress("Querying project metadata".to_owned());
         let query_config = QueryConfig::Rustc(&sysroot, project_json.path().as_ref());
-        let toolchain = version::get(query_config, &config.extra_env).ok().flatten();
+        let targets = target_tuple::get(query_config, config.target.as_deref(), &config.extra_env)
+            .unwrap_or_default();
+
+        // We spawn a bunch of processes to query various information about the workspace's
+        // toolchain and sysroot
+        // We can speed up loading a bit by spawning all of these processes in parallel (especially
+        // on systems were process spawning is delayed)
+        let join = thread::scope(|s| {
+            let toolchain =
+                s.spawn(|| version::get(query_config, &config.extra_env).ok().flatten());
+            let rustc_cfg = s.spawn(|| {
+                rustc_cfg::get(query_config, targets.first().map(Deref::deref), &config.extra_env)
+            });
+            let data_layout = s.spawn(|| {
+                target_data_layout::get(
+                    query_config,
+                    targets.first().map(Deref::deref),
+                    &config.extra_env,
+                )
+            });
+            thread::Result::Ok((toolchain.join()?, rustc_cfg.join()?, data_layout.join()?))
+        });
+
+        let (toolchain, rustc_cfg, target_layout) = match join {
+            Ok(it) => it,
+            Err(e) => std::panic::resume_unwind(e),
+        };
 
-        let target = config.target.as_deref();
-        let rustc_cfg = rustc_cfg::get(query_config, target, &config.extra_env);
-        let data_layout = target_data_layout::get(query_config, target, &config.extra_env);
         ProjectWorkspace {
             kind: ProjectWorkspaceKind::Json(project_json),
             sysroot,
             rustc_cfg,
             toolchain,
-            target_layout: data_layout.map(Arc::from).map_err(|it| Arc::from(it.to_string())),
+            target_layout: target_layout.map(Arc::from).map_err(|it| Arc::from(it.to_string())),
             cfg_overrides: config.cfg_overrides.clone(),
             extra_includes: config.extra_includes.clone(),
+            set_test: config.set_test,
         }
     }
 
@@ -363,7 +461,7 @@ impl ProjectWorkspace {
     ) -> anyhow::Result<ProjectWorkspace> {
         let dir = detached_file.parent();
         let mut sysroot = match &config.sysroot {
-            Some(RustLibSource::Path(path)) => Sysroot::discover_sysroot_src_dir(path.clone()),
+            Some(RustLibSource::Path(path)) => Sysroot::discover_rust_lib_src_dir(path.clone()),
             Some(RustLibSource::Discover) => Sysroot::discover(dir, &config.extra_env),
             None => Sysroot::empty(),
         };
@@ -374,9 +472,12 @@ impl ProjectWorkspace {
             .unwrap_or_default();
         let rustc_cfg = rustc_cfg::get(query_config, None, &config.extra_env);
         let data_layout = target_data_layout::get(query_config, None, &config.extra_env);
-        sysroot.load_workspace(&SysrootSourceWorkspaceConfig::CargoMetadata(
+        let loaded_sysroot = sysroot.load_workspace(&RustSourceWorkspaceConfig::CargoMetadata(
             sysroot_metadata_config(&config.extra_env, &targets),
         ));
+        if let Some(loaded_sysroot) = loaded_sysroot {
+            sysroot.set_workspace(loaded_sysroot);
+        }
 
         let cargo_script = CargoWorkspace::fetch_metadata(
             detached_file,
@@ -406,7 +507,6 @@ impl ProjectWorkspace {
             kind: ProjectWorkspaceKind::DetachedFile {
                 file: detached_file.to_owned(),
                 cargo: cargo_script,
-                set_test: config.set_test,
             },
             sysroot,
             rustc_cfg,
@@ -414,6 +514,7 @@ impl ProjectWorkspace {
             target_layout: data_layout.map(Arc::from).map_err(|it| Arc::from(it.to_string())),
             cfg_overrides: config.cfg_overrides.clone(),
             extra_includes: config.extra_includes.clone(),
+            set_test: config.set_test,
         })
     }
 
@@ -545,7 +646,7 @@ impl ProjectWorkspace {
     pub fn to_roots(&self) -> Vec<PackageRoot> {
         let mk_sysroot = || {
             let mut r = match self.sysroot.workspace() {
-                SysrootWorkspace::Workspace(ws) => ws
+                RustLibSrcWorkspace::Workspace(ws) => ws
                     .packages()
                     .filter_map(|pkg| {
                         if ws[pkg].is_local {
@@ -566,12 +667,17 @@ impl ProjectWorkspace {
                         Some(PackageRoot { is_local: false, include, exclude })
                     })
                     .collect(),
-                SysrootWorkspace::Stitched(_) | SysrootWorkspace::Empty => vec![],
+                RustLibSrcWorkspace::Stitched(_) | RustLibSrcWorkspace::Empty => vec![],
             };
 
             r.push(PackageRoot {
                 is_local: false,
-                include: self.sysroot.src_root().map(|it| it.to_path_buf()).into_iter().collect(),
+                include: self
+                    .sysroot
+                    .rust_lib_src_root()
+                    .map(|it| it.to_path_buf())
+                    .into_iter()
+                    .collect(),
                 exclude: Vec::new(),
             });
             r
@@ -593,7 +699,7 @@ impl ProjectWorkspace {
                 .into_iter()
                 .chain(mk_sysroot())
                 .collect::<Vec<_>>(),
-            ProjectWorkspaceKind::Cargo { cargo, rustc, build_scripts, error: _, set_test: _ } => {
+            ProjectWorkspaceKind::Cargo { cargo, rustc, build_scripts, error: _ } => {
                 cargo
                     .packages()
                     .map(|pkg| {
@@ -728,8 +834,9 @@ impl ProjectWorkspace {
                 sysroot,
                 extra_env,
                 cfg_overrides,
+                self.set_test,
             ),
-            ProjectWorkspaceKind::Cargo { cargo, rustc, build_scripts, error: _, set_test } => {
+            ProjectWorkspaceKind::Cargo { cargo, rustc, build_scripts, error: _ } => {
                 cargo_to_crate_graph(
                     load,
                     rustc.as_ref().map(|a| a.as_ref()).ok(),
@@ -738,10 +845,10 @@ impl ProjectWorkspace {
                     rustc_cfg.clone(),
                     cfg_overrides,
                     build_scripts,
-                    *set_test,
+                    self.set_test,
                 )
             }
-            ProjectWorkspaceKind::DetachedFile { file, cargo: cargo_script, set_test, .. } => {
+            ProjectWorkspaceKind::DetachedFile { file, cargo: cargo_script, .. } => {
                 if let Some((cargo, build_scripts, _)) = cargo_script {
                     cargo_to_crate_graph(
                         &mut |path| load(path),
@@ -751,7 +858,7 @@ impl ProjectWorkspace {
                         rustc_cfg.clone(),
                         cfg_overrides,
                         build_scripts,
-                        *set_test,
+                        self.set_test,
                     )
                 } else {
                     detached_file_to_crate_graph(
@@ -760,7 +867,7 @@ impl ProjectWorkspace {
                         file,
                         sysroot,
                         cfg_overrides,
-                        *set_test,
+                        self.set_test,
                     )
                 }
             }
@@ -782,34 +889,22 @@ impl ProjectWorkspace {
         } = other;
         (match (kind, o_kind) {
             (
-                ProjectWorkspaceKind::Cargo {
-                    cargo,
-                    rustc,
-                    build_scripts: _,
-                    error: _,
-                    set_test: _,
-                },
+                ProjectWorkspaceKind::Cargo { cargo, rustc, build_scripts: _, error: _ },
                 ProjectWorkspaceKind::Cargo {
                     cargo: o_cargo,
                     rustc: o_rustc,
                     build_scripts: _,
                     error: _,
-                    set_test: _,
                 },
             ) => cargo == o_cargo && rustc == o_rustc,
             (ProjectWorkspaceKind::Json(project), ProjectWorkspaceKind::Json(o_project)) => {
                 project == o_project
             }
             (
-                ProjectWorkspaceKind::DetachedFile {
-                    file,
-                    cargo: Some((cargo_script, _, _)),
-                    set_test: _,
-                },
+                ProjectWorkspaceKind::DetachedFile { file, cargo: Some((cargo_script, _, _)) },
                 ProjectWorkspaceKind::DetachedFile {
                     file: o_file,
                     cargo: Some((o_cargo_script, _, _)),
-                    set_test: _,
                 },
             ) => file == o_file && cargo_script == o_cargo_script,
             _ => return false,
@@ -837,13 +932,13 @@ fn project_json_to_crate_graph(
     sysroot: &Sysroot,
     extra_env: &FxHashMap<String, String>,
     override_cfg: &CfgOverrides,
+    set_test: bool,
 ) -> (CrateGraph, ProcMacroPaths) {
     let mut res = (CrateGraph::default(), ProcMacroPaths::default());
     let (crate_graph, proc_macros) = &mut res;
     let (public_deps, libproc_macro) =
         sysroot_to_crate_graph(crate_graph, sysroot, rustc_cfg.clone(), load);
 
-    let r_a_cfg_flag = CfgAtom::Flag(sym::rust_analyzer.clone());
     let mut cfg_cache: FxHashMap<&str, Vec<CfgAtom>> = FxHashMap::default();
 
     let idx_to_crate_id: FxHashMap<CrateArrayIdx, CrateId> = project
@@ -862,6 +957,7 @@ fn project_json_to_crate_graph(
                     proc_macro_dylib_path,
                     is_proc_macro,
                     repository,
+                    is_workspace_member,
                     ..
                 },
                 file_id,
@@ -879,19 +975,28 @@ fn project_json_to_crate_graph(
                     None => &rustc_cfg,
                 };
 
-                let mut cfg_options = target_cfgs
-                    .iter()
-                    .chain(cfg.iter())
-                    .chain(iter::once(&r_a_cfg_flag))
-                    .cloned()
-                    .collect();
-                override_cfg.apply(
-                    &mut cfg_options,
-                    display_name
-                        .as_ref()
-                        .map(|it| it.canonical_name().as_str())
-                        .unwrap_or_default(),
-                );
+                let cfg_options = {
+                    let mut cfg_options: CfgOptions =
+                        target_cfgs.iter().chain(cfg.iter()).cloned().collect();
+
+                    if *is_workspace_member {
+                        if set_test {
+                            // Add test cfg for local crates
+                            cfg_options.insert_atom(sym::test.clone());
+                        }
+                        cfg_options.insert_atom(sym::rust_analyzer.clone());
+                    }
+
+                    override_cfg.apply(
+                        &mut cfg_options,
+                        display_name
+                            .as_ref()
+                            .map(|it| it.canonical_name().as_str())
+                            .unwrap_or_default(),
+                    );
+                    cfg_options
+                };
+
                 let crate_graph_crate_id = crate_graph.add_crate_root(
                     file_id,
                     *edition,
@@ -1385,7 +1490,7 @@ fn sysroot_to_crate_graph(
 ) -> (SysrootPublicDeps, Option<CrateId>) {
     let _p = tracing::info_span!("sysroot_to_crate_graph").entered();
     match sysroot.workspace() {
-        SysrootWorkspace::Workspace(cargo) => {
+        RustLibSrcWorkspace::Workspace(cargo) => {
             let (mut cg, mut pm) = cargo_to_crate_graph(
                 load,
                 None,
@@ -1460,7 +1565,7 @@ fn sysroot_to_crate_graph(
 
             (SysrootPublicDeps { deps: pub_deps }, libproc_macro)
         }
-        SysrootWorkspace::Stitched(stitched) => {
+        RustLibSrcWorkspace::Stitched(stitched) => {
             let cfg_options = Arc::new({
                 let mut cfg_options = CfgOptions::default();
                 cfg_options.extend(rustc_cfg);
@@ -1468,7 +1573,7 @@ fn sysroot_to_crate_graph(
                 cfg_options.insert_atom(sym::miri.clone());
                 cfg_options
             });
-            let sysroot_crates: FxHashMap<SysrootCrate, CrateId> = stitched
+            let sysroot_crates: FxHashMap<RustLibSrcCrate, CrateId> = stitched
                 .crates()
                 .filter_map(|krate| {
                     let file_id = load(&stitched[krate].root)?;
@@ -1513,7 +1618,7 @@ fn sysroot_to_crate_graph(
                 stitched.proc_macro().and_then(|it| sysroot_crates.get(&it).copied());
             (public_deps, libproc_macro)
         }
-        SysrootWorkspace::Empty => (SysrootPublicDeps { deps: vec![] }, None),
+        RustLibSrcWorkspace::Empty => (SysrootPublicDeps { deps: vec![] }, None),
     }
 }
 
diff --git a/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_cfg_groups.txt b/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_cfg_groups.txt
index 2026ab2b8c2fa..587d3c17827e0 100644
--- a/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_cfg_groups.txt
+++ b/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_cfg_groups.txt
@@ -420,6 +420,7 @@
                 "group1_other_cfg=other_config",
                 "group2_cfg=yet_another_config",
                 "rust_analyzer",
+                "test",
                 "true",
             ],
         ),
@@ -496,6 +497,7 @@
                 "group2_cfg=fourth_config",
                 "group2_cfg=yet_another_config",
                 "rust_analyzer",
+                "test",
                 "true",
                 "unrelated_cfg",
             ],
diff --git a/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_hello_world_project_model.txt b/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_hello_world_project_model.txt
index a0e14b8fcb22c..00805c79bccec 100644
--- a/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_hello_world_project_model.txt
+++ b/src/tools/rust-analyzer/crates/project-model/test_data/output/rust_project_hello_world_project_model.txt
@@ -417,6 +417,7 @@
         cfg_options: CfgOptions(
             [
                 "rust_analyzer",
+                "test",
                 "true",
             ],
         ),
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs
index 199f61e70f027..e9ca12deaf6e6 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs
@@ -12,8 +12,8 @@ use paths::Utf8PathBuf;
 use profile::StopWatch;
 use project_model::toolchain_info::{target_data_layout, QueryConfig};
 use project_model::{
-    CargoConfig, ManifestPath, ProjectWorkspace, ProjectWorkspaceKind, RustLibSource, Sysroot,
-    SysrootSourceWorkspaceConfig,
+    CargoConfig, ManifestPath, ProjectWorkspace, ProjectWorkspaceKind, RustLibSource,
+    RustSourceWorkspaceConfig, Sysroot,
 };
 
 use load_cargo::{load_workspace, LoadCargoConfig, ProcMacroServerChoice};
@@ -75,7 +75,11 @@ impl Tester {
         };
 
         let mut sysroot = Sysroot::discover(tmp_file.parent().unwrap(), &cargo_config.extra_env);
-        sysroot.load_workspace(&SysrootSourceWorkspaceConfig::default_cargo());
+        let loaded_sysroot = sysroot.load_workspace(&RustSourceWorkspaceConfig::default_cargo());
+        if let Some(loaded_sysroot) = loaded_sysroot {
+            sysroot.set_workspace(loaded_sysroot);
+        }
+
         let data_layout = target_data_layout::get(
             QueryConfig::Rustc(&sysroot, tmp_file.parent().unwrap().as_ref()),
             None,
@@ -86,7 +90,6 @@ impl Tester {
             kind: ProjectWorkspaceKind::DetachedFile {
                 file: ManifestPath::try_from(tmp_file).unwrap(),
                 cargo: None,
-                set_test: true,
             },
             sysroot,
             rustc_cfg: vec![],
@@ -94,6 +97,7 @@ impl Tester {
             target_layout: data_layout.map(Arc::from).map_err(|it| Arc::from(it.to_string())),
             cfg_overrides: Default::default(),
             extra_includes: vec![],
+            set_test: true,
         };
         let load_cargo_config = LoadCargoConfig {
             load_out_dirs_from_check: false,
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs
index e915e55722bbb..d7e9a5c586c90 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs
@@ -84,10 +84,10 @@ config_data! {
         completion_snippets_custom: FxHashMap<String, SnippetDef> = Config::completion_snippets_default(),
 
 
-        /// These directories will be ignored by rust-analyzer. They are
+        /// These paths (file/directories) will be ignored by rust-analyzer. They are
         /// relative to the workspace root, and globs are not supported. You may
         /// also need to add the folders to Code's `files.watcherExclude`.
-        files_excludeDirs: Vec<Utf8PathBuf> = vec![],
+        files_exclude | files_excludeDirs: Vec<Utf8PathBuf> = vec![],
 
 
 
@@ -1792,7 +1792,7 @@ impl Config {
 
     fn discovered_projects(&self) -> Vec<ManifestOrProjectJson> {
         let exclude_dirs: Vec<_> =
-            self.files_excludeDirs().iter().map(|p| self.root_path.join(p)).collect();
+            self.files_exclude().iter().map(|p| self.root_path.join(p)).collect();
 
         let mut projects = vec![];
         for fs_proj in &self.discovered_projects_from_filesystem {
@@ -1914,10 +1914,14 @@ impl Config {
                 }
                 _ => FilesWatcher::Server,
             },
-            exclude: self.files_excludeDirs().iter().map(|it| self.root_path.join(it)).collect(),
+            exclude: self.excluded().collect(),
         }
     }
 
+    pub fn excluded(&self) -> impl Iterator<Item = AbsPathBuf> + use<'_> {
+        self.files_exclude().iter().map(|it| self.root_path.join(it))
+    }
+
     pub fn notifications(&self) -> NotificationsConfig {
         NotificationsConfig {
             cargo_toml_not_found: self.notifications_cargoTomlNotFound().to_owned(),
@@ -3798,8 +3802,10 @@ mod tests {
         (config, _, _) = config.apply_change(change);
 
         assert_eq!(config.cargo_targetDir(None), &Some(TargetDirectory::UseSubdirectory(true)));
+        let target =
+            Utf8PathBuf::from(std::env::var("CARGO_TARGET_DIR").unwrap_or("target".to_owned()));
         assert!(
-            matches!(config.flycheck(None), FlycheckConfig::CargoCommand { options, .. } if options.target_dir == Some(Utf8PathBuf::from("target/rust-analyzer")))
+            matches!(config.flycheck(None), FlycheckConfig::CargoCommand { options, .. } if options.target_dir == Some(target.join("rust-analyzer")))
         );
     }
 
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs
index b52f64aaacecb..70105cda006b2 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/global_state.rs
@@ -650,7 +650,8 @@ impl GlobalStateSnapshot {
         RwLockReadGuard::map(self.vfs.read(), |(it, _)| it)
     }
 
-    pub(crate) fn url_to_file_id(&self, url: &Url) -> anyhow::Result<FileId> {
+    /// Returns `None` if the file was excluded.
+    pub(crate) fn url_to_file_id(&self, url: &Url) -> anyhow::Result<Option<FileId>> {
         url_to_file_id(&self.vfs_read(), url)
     }
 
@@ -658,7 +659,8 @@ impl GlobalStateSnapshot {
         file_id_to_url(&self.vfs_read(), id)
     }
 
-    pub(crate) fn vfs_path_to_file_id(&self, vfs_path: &VfsPath) -> anyhow::Result<FileId> {
+    /// Returns `None` if the file was excluded.
+    pub(crate) fn vfs_path_to_file_id(&self, vfs_path: &VfsPath) -> anyhow::Result<Option<FileId>> {
         vfs_path_to_file_id(&self.vfs_read(), vfs_path)
     }
 
@@ -750,14 +752,21 @@ pub(crate) fn file_id_to_url(vfs: &vfs::Vfs, id: FileId) -> Url {
     url_from_abs_path(path)
 }
 
-pub(crate) fn url_to_file_id(vfs: &vfs::Vfs, url: &Url) -> anyhow::Result<FileId> {
+/// Returns `None` if the file was excluded.
+pub(crate) fn url_to_file_id(vfs: &vfs::Vfs, url: &Url) -> anyhow::Result<Option<FileId>> {
     let path = from_proto::vfs_path(url)?;
-    let res = vfs.file_id(&path).ok_or_else(|| anyhow::format_err!("file not found: {path}"))?;
-    Ok(res)
+    vfs_path_to_file_id(vfs, &path)
 }
 
-pub(crate) fn vfs_path_to_file_id(vfs: &vfs::Vfs, vfs_path: &VfsPath) -> anyhow::Result<FileId> {
-    let res =
+/// Returns `None` if the file was excluded.
+pub(crate) fn vfs_path_to_file_id(
+    vfs: &vfs::Vfs,
+    vfs_path: &VfsPath,
+) -> anyhow::Result<Option<FileId>> {
+    let (file_id, excluded) =
         vfs.file_id(vfs_path).ok_or_else(|| anyhow::format_err!("file not found: {vfs_path}"))?;
-    Ok(res)
+    match excluded {
+        vfs::FileExcluded::Yes => Ok(None),
+        vfs::FileExcluded::No => Ok(Some(file_id)),
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/notification.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/notification.rs
index 48856d19e155d..55344a4d6ac60 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/notification.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/notification.rs
@@ -22,6 +22,7 @@ use crate::{
     mem_docs::DocumentData,
     reload,
     target_spec::TargetSpec,
+    try_default,
 };
 
 pub(crate) fn handle_cancel(state: &mut GlobalState, params: CancelParams) -> anyhow::Result<()> {
@@ -74,6 +75,14 @@ pub(crate) fn handle_did_open_text_document(
             tracing::error!("duplicate DidOpenTextDocument: {}", path);
         }
 
+        if let Some(abs_path) = path.as_path() {
+            if state.config.excluded().any(|excluded| abs_path.starts_with(&excluded)) {
+                tracing::trace!("opened excluded file {abs_path}");
+                state.vfs.write().0.insert_excluded_file(path);
+                return Ok(());
+            }
+        }
+
         let contents = params.text_document.text.into_bytes();
         state.vfs.write().0.set_file_contents(path, Some(contents));
         if state.config.discover_workspace_config().is_some() {
@@ -127,7 +136,8 @@ pub(crate) fn handle_did_close_text_document(
             tracing::error!("orphan DidCloseTextDocument: {}", path);
         }
 
-        if let Some(file_id) = state.vfs.read().0.file_id(&path) {
+        // Clear diagnostics also for excluded files, just in case.
+        if let Some((file_id, _)) = state.vfs.read().0.file_id(&path) {
             state.diagnostics.clear_native_for(file_id);
         }
 
@@ -146,7 +156,7 @@ pub(crate) fn handle_did_save_text_document(
 ) -> anyhow::Result<()> {
     if let Ok(vfs_path) = from_proto::vfs_path(&params.text_document.uri) {
         let snap = state.snapshot();
-        let file_id = snap.vfs_path_to_file_id(&vfs_path)?;
+        let file_id = try_default!(snap.vfs_path_to_file_id(&vfs_path)?);
         let sr = snap.analysis.source_root_id(file_id)?;
 
         if state.config.script_rebuild_on_save(Some(sr)) && state.build_deps_changed {
@@ -290,7 +300,7 @@ fn run_flycheck(state: &mut GlobalState, vfs_path: VfsPath) -> bool {
     let _p = tracing::info_span!("run_flycheck").entered();
 
     let file_id = state.vfs.read().0.file_id(&vfs_path);
-    if let Some(file_id) = file_id {
+    if let Some((file_id, vfs::FileExcluded::No)) = file_id {
         let world = state.snapshot();
         let invocation_strategy_once = state.config.flycheck(None).invocation_strategy_once();
         let may_flycheck_workspace = state.config.flycheck_workspace(None);
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/request.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/request.rs
index ed028f1d37b67..1b144d90732e6 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/request.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/handlers/request.rs
@@ -53,6 +53,7 @@ use crate::{
     },
     target_spec::{CargoTargetSpec, TargetSpec},
     test_runner::{CargoTestHandle, TestTarget},
+    try_default,
 };
 
 pub(crate) fn handle_workspace_reload(state: &mut GlobalState, _: ()) -> anyhow::Result<()> {
@@ -83,7 +84,8 @@ pub(crate) fn handle_analyzer_status(
     let mut file_id = None;
     if let Some(tdi) = params.text_document {
         match from_proto::file_id(&snap, &tdi.uri) {
-            Ok(it) => file_id = Some(it),
+            Ok(Some(it)) => file_id = Some(it),
+            Ok(None) => {}
             Err(_) => format_to!(buf, "file {} not found in vfs", tdi.uri),
         }
     }
@@ -141,7 +143,7 @@ pub(crate) fn handle_view_syntax_tree(
     params: lsp_ext::ViewSyntaxTreeParams,
 ) -> anyhow::Result<String> {
     let _p = tracing::info_span!("handle_view_syntax_tree").entered();
-    let id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let res = snap.analysis.view_syntax_tree(id)?;
     Ok(res)
 }
@@ -151,7 +153,7 @@ pub(crate) fn handle_view_hir(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<String> {
     let _p = tracing::info_span!("handle_view_hir").entered();
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
     let res = snap.analysis.view_hir(position)?;
     Ok(res)
 }
@@ -161,7 +163,7 @@ pub(crate) fn handle_view_mir(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<String> {
     let _p = tracing::info_span!("handle_view_mir").entered();
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
     let res = snap.analysis.view_mir(position)?;
     Ok(res)
 }
@@ -171,7 +173,7 @@ pub(crate) fn handle_interpret_function(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<String> {
     let _p = tracing::info_span!("handle_interpret_function").entered();
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
     let res = snap.analysis.interpret_function(position)?;
     Ok(res)
 }
@@ -180,7 +182,7 @@ pub(crate) fn handle_view_file_text(
     snap: GlobalStateSnapshot,
     params: lsp_types::TextDocumentIdentifier,
 ) -> anyhow::Result<String> {
-    let file_id = from_proto::file_id(&snap, &params.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.uri)?);
     Ok(snap.analysis.file_text(file_id)?.to_string())
 }
 
@@ -189,7 +191,7 @@ pub(crate) fn handle_view_item_tree(
     params: lsp_ext::ViewItemTreeParams,
 ) -> anyhow::Result<String> {
     let _p = tracing::info_span!("handle_view_item_tree").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let res = snap.analysis.view_item_tree(file_id)?;
     Ok(res)
 }
@@ -315,7 +317,7 @@ pub(crate) fn handle_expand_macro(
     params: lsp_ext::ExpandMacroParams,
 ) -> anyhow::Result<Option<lsp_ext::ExpandedMacro>> {
     let _p = tracing::info_span!("handle_expand_macro").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let line_index = snap.file_line_index(file_id)?;
     let offset = from_proto::offset(&line_index, params.position)?;
 
@@ -328,7 +330,7 @@ pub(crate) fn handle_selection_range(
     params: lsp_types::SelectionRangeParams,
 ) -> anyhow::Result<Option<Vec<lsp_types::SelectionRange>>> {
     let _p = tracing::info_span!("handle_selection_range").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let line_index = snap.file_line_index(file_id)?;
     let res: anyhow::Result<Vec<lsp_types::SelectionRange>> = params
         .positions
@@ -371,7 +373,7 @@ pub(crate) fn handle_matching_brace(
     params: lsp_ext::MatchingBraceParams,
 ) -> anyhow::Result<Vec<Position>> {
     let _p = tracing::info_span!("handle_matching_brace").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let line_index = snap.file_line_index(file_id)?;
     params
         .positions
@@ -395,7 +397,7 @@ pub(crate) fn handle_join_lines(
 ) -> anyhow::Result<Vec<lsp_types::TextEdit>> {
     let _p = tracing::info_span!("handle_join_lines").entered();
 
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let config = snap.config.join_lines();
     let line_index = snap.file_line_index(file_id)?;
 
@@ -419,7 +421,7 @@ pub(crate) fn handle_on_enter(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<Option<Vec<lsp_ext::SnippetTextEdit>>> {
     let _p = tracing::info_span!("handle_on_enter").entered();
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
     let edit = match snap.analysis.on_enter(position)? {
         None => return Ok(None),
         Some(it) => it,
@@ -439,7 +441,8 @@ pub(crate) fn handle_on_type_formatting(
         return Ok(None);
     }
 
-    let mut position = from_proto::file_position(&snap, params.text_document_position)?;
+    let mut position =
+        try_default!(from_proto::file_position(&snap, params.text_document_position)?);
     let line_index = snap.file_line_index(position.file_id)?;
 
     // in `ide`, the `on_type` invariant is that
@@ -465,32 +468,33 @@ pub(crate) fn handle_on_type_formatting(
     Ok(Some(change))
 }
 
+pub(crate) fn empty_diagnostic_report() -> lsp_types::DocumentDiagnosticReportResult {
+    lsp_types::DocumentDiagnosticReportResult::Report(lsp_types::DocumentDiagnosticReport::Full(
+        lsp_types::RelatedFullDocumentDiagnosticReport {
+            related_documents: None,
+            full_document_diagnostic_report: lsp_types::FullDocumentDiagnosticReport {
+                result_id: Some("rust-analyzer".to_owned()),
+                items: vec![],
+            },
+        },
+    ))
+}
+
 pub(crate) fn handle_document_diagnostics(
     snap: GlobalStateSnapshot,
     params: lsp_types::DocumentDiagnosticParams,
 ) -> anyhow::Result<lsp_types::DocumentDiagnosticReportResult> {
-    let empty = || {
-        lsp_types::DocumentDiagnosticReportResult::Report(
-            lsp_types::DocumentDiagnosticReport::Full(
-                lsp_types::RelatedFullDocumentDiagnosticReport {
-                    related_documents: None,
-                    full_document_diagnostic_report: lsp_types::FullDocumentDiagnosticReport {
-                        result_id: Some("rust-analyzer".to_owned()),
-                        items: vec![],
-                    },
-                },
-            ),
-        )
+    let file_id = match from_proto::file_id(&snap, &params.text_document.uri)? {
+        Some(it) => it,
+        None => return Ok(empty_diagnostic_report()),
     };
-
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
     let source_root = snap.analysis.source_root_id(file_id)?;
     if !snap.analysis.is_local_source_root(source_root)? {
-        return Ok(empty());
+        return Ok(empty_diagnostic_report());
     }
     let config = snap.config.diagnostics(Some(source_root));
     if !config.enabled {
-        return Ok(empty());
+        return Ok(empty_diagnostic_report());
     }
     let line_index = snap.file_line_index(file_id)?;
     let supports_related = snap.config.text_document_diagnostic_related_document_support();
@@ -546,7 +550,7 @@ pub(crate) fn handle_document_symbol(
     params: lsp_types::DocumentSymbolParams,
 ) -> anyhow::Result<Option<lsp_types::DocumentSymbolResponse>> {
     let _p = tracing::info_span!("handle_document_symbol").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let line_index = snap.file_line_index(file_id)?;
 
     let mut parents: Vec<(lsp_types::DocumentSymbol, Option<usize>)> = Vec::new();
@@ -760,7 +764,7 @@ pub(crate) fn handle_will_rename_files(
             }
         })
         .filter_map(|(file_id, new_name)| {
-            snap.analysis.will_rename_file(file_id, &new_name).ok()?
+            snap.analysis.will_rename_file(file_id?, &new_name).ok()?
         })
         .collect();
 
@@ -782,7 +786,8 @@ pub(crate) fn handle_goto_definition(
     params: lsp_types::GotoDefinitionParams,
 ) -> anyhow::Result<Option<lsp_types::GotoDefinitionResponse>> {
     let _p = tracing::info_span!("handle_goto_definition").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position_params)?;
+    let position =
+        try_default!(from_proto::file_position(&snap, params.text_document_position_params)?);
     let nav_info = match snap.analysis.goto_definition(position)? {
         None => return Ok(None),
         Some(it) => it,
@@ -797,7 +802,10 @@ pub(crate) fn handle_goto_declaration(
     params: lsp_types::request::GotoDeclarationParams,
 ) -> anyhow::Result<Option<lsp_types::request::GotoDeclarationResponse>> {
     let _p = tracing::info_span!("handle_goto_declaration").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position_params.clone())?;
+    let position = try_default!(from_proto::file_position(
+        &snap,
+        params.text_document_position_params.clone()
+    )?);
     let nav_info = match snap.analysis.goto_declaration(position)? {
         None => return handle_goto_definition(snap, params),
         Some(it) => it,
@@ -812,7 +820,8 @@ pub(crate) fn handle_goto_implementation(
     params: lsp_types::request::GotoImplementationParams,
 ) -> anyhow::Result<Option<lsp_types::request::GotoImplementationResponse>> {
     let _p = tracing::info_span!("handle_goto_implementation").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position_params)?;
+    let position =
+        try_default!(from_proto::file_position(&snap, params.text_document_position_params)?);
     let nav_info = match snap.analysis.goto_implementation(position)? {
         None => return Ok(None),
         Some(it) => it,
@@ -827,7 +836,8 @@ pub(crate) fn handle_goto_type_definition(
     params: lsp_types::request::GotoTypeDefinitionParams,
 ) -> anyhow::Result<Option<lsp_types::request::GotoTypeDefinitionResponse>> {
     let _p = tracing::info_span!("handle_goto_type_definition").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position_params)?;
+    let position =
+        try_default!(from_proto::file_position(&snap, params.text_document_position_params)?);
     let nav_info = match snap.analysis.goto_type_definition(position)? {
         None => return Ok(None),
         Some(it) => it,
@@ -880,7 +890,7 @@ pub(crate) fn handle_parent_module(
         }
 
         // check if invoked at the crate root
-        let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+        let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
         let crate_id = match snap.analysis.crates_for(file_id)?.first() {
             Some(&crate_id) => crate_id,
             None => return Ok(None),
@@ -904,7 +914,7 @@ pub(crate) fn handle_parent_module(
     }
 
     // locate parent module by semantics
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
     let navs = snap.analysis.parent_module(position)?;
     let res = to_proto::goto_definition_response(&snap, None, navs)?;
     Ok(Some(res))
@@ -915,7 +925,7 @@ pub(crate) fn handle_runnables(
     params: lsp_ext::RunnablesParams,
 ) -> anyhow::Result<Vec<lsp_ext::Runnable>> {
     let _p = tracing::info_span!("handle_runnables").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let source_root = snap.analysis.source_root_id(file_id).ok();
     let line_index = snap.file_line_index(file_id)?;
     let offset = params.position.and_then(|it| from_proto::offset(&line_index, it).ok());
@@ -1035,7 +1045,7 @@ pub(crate) fn handle_related_tests(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<Vec<lsp_ext::TestInfo>> {
     let _p = tracing::info_span!("handle_related_tests").entered();
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
 
     let tests = snap.analysis.related_tests(position, None)?;
     let mut res = Vec::new();
@@ -1053,7 +1063,8 @@ pub(crate) fn handle_completion(
     lsp_types::CompletionParams { text_document_position, context,.. }: lsp_types::CompletionParams,
 ) -> anyhow::Result<Option<lsp_types::CompletionResponse>> {
     let _p = tracing::info_span!("handle_completion").entered();
-    let mut position = from_proto::file_position(&snap, text_document_position.clone())?;
+    let mut position =
+        try_default!(from_proto::file_position(&snap, text_document_position.clone())?);
     let line_index = snap.file_line_index(position.file_id)?;
     let completion_trigger_character =
         context.and_then(|ctx| ctx.trigger_character).and_then(|s| s.chars().next());
@@ -1102,7 +1113,8 @@ pub(crate) fn handle_completion_resolve(
 
     let resolve_data: lsp_ext::CompletionResolveData = serde_json::from_value(data)?;
 
-    let file_id = from_proto::file_id(&snap, &resolve_data.position.text_document.uri)?;
+    let file_id = from_proto::file_id(&snap, &resolve_data.position.text_document.uri)?
+        .expect("we never provide completions for excluded files");
     let line_index = snap.file_line_index(file_id)?;
     // FIXME: We should fix up the position when retrying the cancelled request instead
     let Ok(offset) = from_proto::offset(&line_index, resolve_data.position.position) else {
@@ -1185,7 +1197,7 @@ pub(crate) fn handle_folding_range(
     params: FoldingRangeParams,
 ) -> anyhow::Result<Option<Vec<FoldingRange>>> {
     let _p = tracing::info_span!("handle_folding_range").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let folds = snap.analysis.folding_ranges(file_id)?;
     let text = snap.analysis.file_text(file_id)?;
     let line_index = snap.file_line_index(file_id)?;
@@ -1202,7 +1214,8 @@ pub(crate) fn handle_signature_help(
     params: lsp_types::SignatureHelpParams,
 ) -> anyhow::Result<Option<lsp_types::SignatureHelp>> {
     let _p = tracing::info_span!("handle_signature_help").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position_params)?;
+    let position =
+        try_default!(from_proto::file_position(&snap, params.text_document_position_params)?);
     let help = match snap.analysis.signature_help(position)? {
         Some(it) => it,
         None => return Ok(None),
@@ -1221,7 +1234,7 @@ pub(crate) fn handle_hover(
         PositionOrRange::Position(position) => Range::new(position, position),
         PositionOrRange::Range(range) => range,
     };
-    let file_range = from_proto::file_range(&snap, &params.text_document, range)?;
+    let file_range = try_default!(from_proto::file_range(&snap, &params.text_document, range)?);
 
     let hover = snap.config.hover();
     let info = match snap.analysis.hover(&hover, file_range)? {
@@ -1255,7 +1268,7 @@ pub(crate) fn handle_prepare_rename(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<Option<PrepareRenameResponse>> {
     let _p = tracing::info_span!("handle_prepare_rename").entered();
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
 
     let change = snap.analysis.prepare_rename(position)?.map_err(to_proto::rename_error)?;
 
@@ -1269,7 +1282,7 @@ pub(crate) fn handle_rename(
     params: RenameParams,
 ) -> anyhow::Result<Option<WorkspaceEdit>> {
     let _p = tracing::info_span!("handle_rename").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position)?;
+    let position = try_default!(from_proto::file_position(&snap, params.text_document_position)?);
 
     let mut change =
         snap.analysis.rename(position, &params.new_name)?.map_err(to_proto::rename_error)?;
@@ -1304,7 +1317,7 @@ pub(crate) fn handle_references(
     params: lsp_types::ReferenceParams,
 ) -> anyhow::Result<Option<Vec<Location>>> {
     let _p = tracing::info_span!("handle_references").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position)?;
+    let position = try_default!(from_proto::file_position(&snap, params.text_document_position)?);
 
     let exclude_imports = snap.config.find_all_refs_exclude_imports();
     let exclude_tests = snap.config.find_all_refs_exclude_tests();
@@ -1375,9 +1388,9 @@ pub(crate) fn handle_code_action(
         return Ok(None);
     }
 
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let line_index = snap.file_line_index(file_id)?;
-    let frange = from_proto::file_range(&snap, &params.text_document, params.range)?;
+    let frange = try_default!(from_proto::file_range(&snap, &params.text_document, params.range)?);
     let source_root = snap.analysis.source_root_id(file_id)?;
 
     let mut assists_config = snap.config.assist(Some(source_root));
@@ -1455,7 +1468,8 @@ pub(crate) fn handle_code_action_resolve(
         return Err(invalid_params_error("code action without data".to_owned()).into());
     };
 
-    let file_id = from_proto::file_id(&snap, &params.code_action_params.text_document.uri)?;
+    let file_id = from_proto::file_id(&snap, &params.code_action_params.text_document.uri)?
+        .expect("we never provide code actions for excluded files");
     if snap.file_version(file_id) != params.version {
         return Err(invalid_params_error("stale code action".to_owned()).into());
     }
@@ -1551,7 +1565,7 @@ pub(crate) fn handle_code_lens(
         return Ok(Some(Vec::default()));
     }
 
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let target_spec = TargetSpec::for_file(&snap, file_id)?;
 
     let annotations = snap.analysis.annotations(
@@ -1613,7 +1627,8 @@ pub(crate) fn handle_document_highlight(
     params: lsp_types::DocumentHighlightParams,
 ) -> anyhow::Result<Option<Vec<lsp_types::DocumentHighlight>>> {
     let _p = tracing::info_span!("handle_document_highlight").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position_params)?;
+    let position =
+        try_default!(from_proto::file_position(&snap, params.text_document_position_params)?);
     let line_index = snap.file_line_index(position.file_id)?;
     let source_root = snap.analysis.source_root_id(position.file_id)?;
 
@@ -1639,12 +1654,12 @@ pub(crate) fn handle_ssr(
     params: lsp_ext::SsrParams,
 ) -> anyhow::Result<lsp_types::WorkspaceEdit> {
     let _p = tracing::info_span!("handle_ssr").entered();
-    let selections = params
+    let selections = try_default!(params
         .selections
         .iter()
         .map(|range| from_proto::file_range(&snap, &params.position.text_document, *range))
-        .collect::<Result<Vec<_>, _>>()?;
-    let position = from_proto::file_position(&snap, params.position)?;
+        .collect::<Result<Option<Vec<_>>, _>>()?);
+    let position = try_default!(from_proto::file_position(&snap, params.position)?);
     let source_change = snap.analysis.structural_search_replace(
         &params.query,
         params.parse_only,
@@ -1660,11 +1675,11 @@ pub(crate) fn handle_inlay_hints(
 ) -> anyhow::Result<Option<Vec<InlayHint>>> {
     let _p = tracing::info_span!("handle_inlay_hints").entered();
     let document_uri = &params.text_document.uri;
-    let FileRange { file_id, range } = from_proto::file_range(
+    let FileRange { file_id, range } = try_default!(from_proto::file_range(
         &snap,
         &TextDocumentIdentifier::new(document_uri.to_owned()),
         params.range,
-    )?;
+    )?);
     let line_index = snap.file_line_index(file_id)?;
     let range = TextRange::new(
         range.start().min(line_index.index.len()),
@@ -1744,7 +1759,8 @@ pub(crate) fn handle_call_hierarchy_prepare(
     params: CallHierarchyPrepareParams,
 ) -> anyhow::Result<Option<Vec<CallHierarchyItem>>> {
     let _p = tracing::info_span!("handle_call_hierarchy_prepare").entered();
-    let position = from_proto::file_position(&snap, params.text_document_position_params)?;
+    let position =
+        try_default!(from_proto::file_position(&snap, params.text_document_position_params)?);
 
     let nav_info = match snap.analysis.call_hierarchy(position)? {
         None => return Ok(None),
@@ -1769,7 +1785,7 @@ pub(crate) fn handle_call_hierarchy_incoming(
     let item = params.item;
 
     let doc = TextDocumentIdentifier::new(item.uri);
-    let frange = from_proto::file_range(&snap, &doc, item.selection_range)?;
+    let frange = try_default!(from_proto::file_range(&snap, &doc, item.selection_range)?);
     let fpos = FilePosition { file_id: frange.file_id, offset: frange.range.start() };
 
     let config = snap.config.call_hierarchy();
@@ -1807,7 +1823,7 @@ pub(crate) fn handle_call_hierarchy_outgoing(
     let item = params.item;
 
     let doc = TextDocumentIdentifier::new(item.uri);
-    let frange = from_proto::file_range(&snap, &doc, item.selection_range)?;
+    let frange = try_default!(from_proto::file_range(&snap, &doc, item.selection_range)?);
     let fpos = FilePosition { file_id: frange.file_id, offset: frange.range.start() };
     let line_index = snap.file_line_index(fpos.file_id)?;
 
@@ -1842,7 +1858,7 @@ pub(crate) fn handle_semantic_tokens_full(
 ) -> anyhow::Result<Option<SemanticTokensResult>> {
     let _p = tracing::info_span!("handle_semantic_tokens_full").entered();
 
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let text = snap.analysis.file_text(file_id)?;
     let line_index = snap.file_line_index(file_id)?;
 
@@ -1872,7 +1888,7 @@ pub(crate) fn handle_semantic_tokens_full_delta(
 ) -> anyhow::Result<Option<SemanticTokensFullDeltaResult>> {
     let _p = tracing::info_span!("handle_semantic_tokens_full_delta").entered();
 
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let text = snap.analysis.file_text(file_id)?;
     let line_index = snap.file_line_index(file_id)?;
 
@@ -1915,7 +1931,7 @@ pub(crate) fn handle_semantic_tokens_range(
 ) -> anyhow::Result<Option<SemanticTokensRangeResult>> {
     let _p = tracing::info_span!("handle_semantic_tokens_range").entered();
 
-    let frange = from_proto::file_range(&snap, &params.text_document, params.range)?;
+    let frange = try_default!(from_proto::file_range(&snap, &params.text_document, params.range)?);
     let text = snap.analysis.file_text(frange.file_id)?;
     let line_index = snap.file_line_index(frange.file_id)?;
 
@@ -1940,7 +1956,7 @@ pub(crate) fn handle_open_docs(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<ExternalDocsResponse> {
     let _p = tracing::info_span!("handle_open_docs").entered();
-    let position = from_proto::file_position(&snap, params)?;
+    let position = try_default!(from_proto::file_position(&snap, params)?);
 
     let ws_and_sysroot = snap.workspaces.iter().find_map(|ws| match &ws.kind {
         ProjectWorkspaceKind::Cargo { cargo, .. }
@@ -1982,7 +1998,7 @@ pub(crate) fn handle_open_cargo_toml(
     params: lsp_ext::OpenCargoTomlParams,
 ) -> anyhow::Result<Option<lsp_types::GotoDefinitionResponse>> {
     let _p = tracing::info_span!("handle_open_cargo_toml").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
 
     let cargo_spec = match TargetSpec::for_file(&snap, file_id)? {
         Some(TargetSpec::Cargo(it)) => it,
@@ -2000,8 +2016,8 @@ pub(crate) fn handle_move_item(
     params: lsp_ext::MoveItemParams,
 ) -> anyhow::Result<Vec<lsp_ext::SnippetTextEdit>> {
     let _p = tracing::info_span!("handle_move_item").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
-    let range = from_proto::file_range(&snap, &params.text_document, params.range)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
+    let range = try_default!(from_proto::file_range(&snap, &params.text_document, params.range)?);
 
     let direction = match params.direction {
         lsp_ext::MoveItemDirection::Up => ide::Direction::Up,
@@ -2022,7 +2038,7 @@ pub(crate) fn handle_view_recursive_memory_layout(
     params: lsp_types::TextDocumentPositionParams,
 ) -> anyhow::Result<Option<lsp_ext::RecursiveMemoryLayout>> {
     let _p = tracing::info_span!("handle_view_recursive_memory_layout").entered();
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(&snap, &params.text_document.uri)?);
     let line_index = snap.file_line_index(file_id)?;
     let offset = from_proto::offset(&line_index, params.position)?;
 
@@ -2210,7 +2226,7 @@ fn run_rustfmt(
     text_document: TextDocumentIdentifier,
     range: Option<lsp_types::Range>,
 ) -> anyhow::Result<Option<Vec<lsp_types::TextEdit>>> {
-    let file_id = from_proto::file_id(snap, &text_document.uri)?;
+    let file_id = try_default!(from_proto::file_id(snap, &text_document.uri)?);
     let file = snap.analysis.file_text(file_id)?;
 
     // Determine the edition of the crate the file belongs to (if there's multiple, we pick the
@@ -2275,7 +2291,7 @@ fn run_rustfmt(
                     .into());
                 }
 
-                let frange = from_proto::file_range(snap, &text_document, range)?;
+                let frange = try_default!(from_proto::file_range(snap, &text_document, range)?);
                 let start_line = line_index.index.line_col(frange.range.start()).line;
                 let end_line = line_index.index.line_col(frange.range.end()).line;
 
@@ -2284,7 +2300,8 @@ fn run_rustfmt(
                 cmd.arg(
                     json!([{
                         "file": "stdin",
-                        "range": [start_line, end_line]
+                        // LineCol is 0-based, but rustfmt is 1-based.
+                        "range": [start_line + 1, end_line + 1]
                     }])
                     .to_string(),
                 );
@@ -2416,15 +2433,15 @@ pub(crate) fn internal_testing_fetch_config(
     state: GlobalStateSnapshot,
     params: InternalTestingFetchConfigParams,
 ) -> anyhow::Result<Option<InternalTestingFetchConfigResponse>> {
-    let source_root = params
-        .text_document
-        .map(|it| {
+    let source_root = match params.text_document {
+        Some(it) => Some(
             state
                 .analysis
-                .source_root_id(from_proto::file_id(&state, &it.uri)?)
-                .map_err(anyhow::Error::from)
-        })
-        .transpose()?;
+                .source_root_id(try_default!(from_proto::file_id(&state, &it.uri)?))
+                .map_err(anyhow::Error::from)?,
+        ),
+        None => None,
+    };
     Ok(Some(match params.config {
         InternalTestingFetchConfigOption::AssistEmitMustUse => {
             InternalTestingFetchConfigResponse::AssistEmitMustUse(
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/integrated_benchmarks.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/integrated_benchmarks.rs
index 5cdc51a1c1995..c6aa8ba170778 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/integrated_benchmarks.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/integrated_benchmarks.rs
@@ -25,6 +25,14 @@ use vfs::{AbsPathBuf, VfsPath};
 
 use load_cargo::{load_workspace_at, LoadCargoConfig, ProcMacroServerChoice};
 
+#[track_caller]
+fn file_id(vfs: &vfs::Vfs, path: &VfsPath) -> vfs::FileId {
+    match vfs.file_id(path) {
+        Some((file_id, vfs::FileExcluded::No)) => file_id,
+        None | Some((_, vfs::FileExcluded::Yes)) => panic!("can't find virtual file for {path}"),
+    }
+}
+
 #[test]
 fn integrated_highlighting_benchmark() {
     if std::env::var("RUN_SLOW_BENCHES").is_err() {
@@ -62,7 +70,7 @@ fn integrated_highlighting_benchmark() {
     let file_id = {
         let file = workspace_to_load.join(file);
         let path = VfsPath::from(AbsPathBuf::assert(file));
-        vfs.file_id(&path).unwrap_or_else(|| panic!("can't find virtual file for {path}"))
+        file_id(&vfs, &path)
     };
 
     {
@@ -130,7 +138,7 @@ fn integrated_completion_benchmark() {
     let file_id = {
         let file = workspace_to_load.join(file);
         let path = VfsPath::from(AbsPathBuf::assert(file));
-        vfs.file_id(&path).unwrap_or_else(|| panic!("can't find virtual file for {path}"))
+        file_id(&vfs, &path)
     };
 
     // kick off parsing and index population
@@ -324,7 +332,7 @@ fn integrated_diagnostics_benchmark() {
     let file_id = {
         let file = workspace_to_load.join(file);
         let path = VfsPath::from(AbsPathBuf::assert(file));
-        vfs.file_id(&path).unwrap_or_else(|| panic!("can't find virtual file for {path}"))
+        file_id(&vfs, &path)
     };
 
     let diagnostics_config = DiagnosticsConfig {
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/lib.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/lib.rs
index 1221f7c7012e7..27d6225cdb7e2 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/lib.rs
@@ -173,3 +173,14 @@ fn completion_item_hash(item: &CompletionItem, is_ref_completion: bool) -> [u8;
 
     hasher.finalize()
 }
+
+#[doc(hidden)]
+macro_rules! try_default_ {
+    ($it:expr $(,)?) => {
+        match $it {
+            Some(it) => it,
+            None => return Ok(Default::default()),
+        }
+    };
+}
+pub(crate) use try_default_ as try_default;
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/from_proto.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/from_proto.rs
index 47e9961cf13fc..6375a1a054b7d 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/from_proto.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/from_proto.rs
@@ -9,7 +9,7 @@ use vfs::AbsPathBuf;
 use crate::{
     global_state::GlobalStateSnapshot,
     line_index::{LineIndex, PositionEncoding},
-    lsp_ext,
+    lsp_ext, try_default,
 };
 
 pub(crate) fn abs_path(url: &lsp_types::Url) -> anyhow::Result<AbsPathBuf> {
@@ -61,37 +61,44 @@ pub(crate) fn text_range(
     }
 }
 
-pub(crate) fn file_id(snap: &GlobalStateSnapshot, url: &lsp_types::Url) -> anyhow::Result<FileId> {
+/// Returns `None` if the file was excluded.
+pub(crate) fn file_id(
+    snap: &GlobalStateSnapshot,
+    url: &lsp_types::Url,
+) -> anyhow::Result<Option<FileId>> {
     snap.url_to_file_id(url)
 }
 
+/// Returns `None` if the file was excluded.
 pub(crate) fn file_position(
     snap: &GlobalStateSnapshot,
     tdpp: lsp_types::TextDocumentPositionParams,
-) -> anyhow::Result<FilePosition> {
-    let file_id = file_id(snap, &tdpp.text_document.uri)?;
+) -> anyhow::Result<Option<FilePosition>> {
+    let file_id = try_default!(file_id(snap, &tdpp.text_document.uri)?);
     let line_index = snap.file_line_index(file_id)?;
     let offset = offset(&line_index, tdpp.position)?;
-    Ok(FilePosition { file_id, offset })
+    Ok(Some(FilePosition { file_id, offset }))
 }
 
+/// Returns `None` if the file was excluded.
 pub(crate) fn file_range(
     snap: &GlobalStateSnapshot,
     text_document_identifier: &lsp_types::TextDocumentIdentifier,
     range: lsp_types::Range,
-) -> anyhow::Result<FileRange> {
+) -> anyhow::Result<Option<FileRange>> {
     file_range_uri(snap, &text_document_identifier.uri, range)
 }
 
+/// Returns `None` if the file was excluded.
 pub(crate) fn file_range_uri(
     snap: &GlobalStateSnapshot,
     document: &lsp_types::Url,
     range: lsp_types::Range,
-) -> anyhow::Result<FileRange> {
-    let file_id = file_id(snap, document)?;
+) -> anyhow::Result<Option<FileRange>> {
+    let file_id = try_default!(file_id(snap, document)?);
     let line_index = snap.file_line_index(file_id)?;
     let range = text_range(&line_index, range)?;
-    Ok(FileRange { file_id, range })
+    Ok(Some(FileRange { file_id, range }))
 }
 
 pub(crate) fn assist_kind(kind: lsp_types::CodeActionKind) -> Option<AssistKind> {
@@ -108,6 +115,7 @@ pub(crate) fn assist_kind(kind: lsp_types::CodeActionKind) -> Option<AssistKind>
     Some(assist_kind)
 }
 
+/// Returns `None` if the file was excluded.
 pub(crate) fn annotation(
     snap: &GlobalStateSnapshot,
     range: lsp_types::Range,
@@ -121,7 +129,7 @@ pub(crate) fn annotation(
                 return Ok(None);
             }
             let pos @ FilePosition { file_id, .. } =
-                file_position(snap, params.text_document_position_params)?;
+                try_default!(file_position(snap, params.text_document_position_params)?);
             let line_index = snap.file_line_index(file_id)?;
 
             Ok(Annotation {
@@ -133,7 +141,7 @@ pub(crate) fn annotation(
             if snap.url_file_version(&params.text_document.uri) != Some(data.version) {
                 return Ok(None);
             }
-            let pos @ FilePosition { file_id, .. } = file_position(snap, params)?;
+            let pos @ FilePosition { file_id, .. } = try_default!(file_position(snap, params)?);
             let line_index = snap.file_line_index(file_id)?;
 
             Ok(Annotation {
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs
index ebc65373b5226..f5d9469f2622f 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/main_loop.rs
@@ -27,7 +27,10 @@ use crate::{
         FetchWorkspaceResponse, GlobalState,
     },
     hack_recover_crate_name,
-    handlers::dispatch::{NotificationDispatcher, RequestDispatcher},
+    handlers::{
+        dispatch::{NotificationDispatcher, RequestDispatcher},
+        request::empty_diagnostic_report,
+    },
     lsp::{
         from_proto, to_proto,
         utils::{notification_is, Progress},
@@ -548,6 +551,9 @@ impl GlobalState {
             self.mem_docs
                 .iter()
                 .map(|path| vfs.file_id(path).unwrap())
+                .filter_map(|(file_id, excluded)| {
+                    (excluded == vfs::FileExcluded::No).then_some(file_id)
+                })
                 .filter(|&file_id| {
                     let source_root = db.file_source_root(file_id);
                     // Only publish diagnostics for files in the workspace, not from crates.io deps
@@ -632,6 +638,9 @@ impl GlobalState {
             .mem_docs
             .iter()
             .map(|path| self.vfs.read().0.file_id(path).unwrap())
+            .filter_map(|(file_id, excluded)| {
+                (excluded == vfs::FileExcluded::No).then_some(file_id)
+            })
             .filter(|&file_id| {
                 let source_root = db.file_source_root(file_id);
                 !db.source_root(source_root).is_library
@@ -879,7 +888,10 @@ impl GlobalState {
                 self.task_pool.handle.spawn_with_sender(ThreadIntent::Worker, move |sender| {
                     let _p = tracing::info_span!("GlobalState::check_if_indexed").entered();
                     tracing::debug!(?uri, "handling uri");
-                    let id = from_proto::file_id(&snap, &uri).expect("unable to get FileId");
+                    let Some(id) = from_proto::file_id(&snap, &uri).expect("unable to get FileId")
+                    else {
+                        return;
+                    };
                     if let Ok(crates) = &snap.analysis.crates_for(id) {
                         if crates.is_empty() {
                             if snap.config.discover_workspace_config().is_some() {
@@ -987,13 +999,14 @@ impl GlobalState {
                 );
                 for diag in diagnostics {
                     match url_to_file_id(&self.vfs.read().0, &diag.url) {
-                        Ok(file_id) => self.diagnostics.add_check_diagnostic(
+                        Ok(Some(file_id)) => self.diagnostics.add_check_diagnostic(
                             id,
                             &package_id,
                             file_id,
                             diag.diagnostic,
                             diag.fix,
                         ),
+                        Ok(None) => {}
                         Err(err) => {
                             error!(
                                 "flycheck {id}: File with cargo diagnostic not found in VFS: {}",
@@ -1115,17 +1128,7 @@ impl GlobalState {
             .on_latency_sensitive::<NO_RETRY, lsp_request::SemanticTokensRangeRequest>(handlers::handle_semantic_tokens_range)
             // FIXME: Some of these NO_RETRY could be retries if the file they are interested didn't change.
             // All other request handlers
-            .on_with_vfs_default::<lsp_request::DocumentDiagnosticRequest>(handlers::handle_document_diagnostics, || lsp_types::DocumentDiagnosticReportResult::Report(
-                lsp_types::DocumentDiagnosticReport::Full(
-                    lsp_types::RelatedFullDocumentDiagnosticReport {
-                        related_documents: None,
-                        full_document_diagnostic_report: lsp_types::FullDocumentDiagnosticReport {
-                            result_id: Some("rust-analyzer".to_owned()),
-                            items: vec![],
-                        },
-                    },
-                ),
-            ), || lsp_server::ResponseError {
+            .on_with_vfs_default::<lsp_request::DocumentDiagnosticRequest>(handlers::handle_document_diagnostics, empty_diagnostic_report, || lsp_server::ResponseError {
                 code: lsp_server::ErrorCode::ServerCancelled as i32,
                 message: "server cancelled the request".to_owned(),
                 data: serde_json::to_value(lsp_types::DiagnosticServerCancellationData {
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs
index d18e577047749..ba72ea35df662 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/reload.rs
@@ -316,6 +316,7 @@ impl GlobalState {
                             let workspace = project_model::ProjectWorkspace::load_inline(
                                 it.clone(),
                                 &cargo_config,
+                                &progress,
                             );
                             Ok(workspace)
                         }
@@ -705,7 +706,9 @@ impl GlobalState {
             let load = |path: &AbsPath| {
                 let vfs_path = vfs::VfsPath::from(path.to_path_buf());
                 self.crate_graph_file_dependencies.insert(vfs_path.clone());
-                vfs.file_id(&vfs_path)
+                vfs.file_id(&vfs_path).and_then(|(file_id, excluded)| {
+                    (excluded == vfs::FileExcluded::No).then_some(file_id)
+                })
             };
 
             ws_to_crate_graph(&self.workspaces, self.config.extra_env(None), load)
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs b/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs
index 2b3c0a47a220d..6f26bdc2cf026 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs
@@ -21,12 +21,14 @@ use lsp_types::{
     notification::DidOpenTextDocument,
     request::{
         CodeActionRequest, Completion, Formatting, GotoTypeDefinition, HoverRequest,
-        InlayHintRequest, InlayHintResolveRequest, WillRenameFiles, WorkspaceSymbolRequest,
+        InlayHintRequest, InlayHintResolveRequest, RangeFormatting, WillRenameFiles,
+        WorkspaceSymbolRequest,
     },
     CodeActionContext, CodeActionParams, CompletionParams, DidOpenTextDocumentParams,
-    DocumentFormattingParams, FileRename, FormattingOptions, GotoDefinitionParams, HoverParams,
-    InlayHint, InlayHintLabel, InlayHintParams, PartialResultParams, Position, Range,
-    RenameFilesParams, TextDocumentItem, TextDocumentPositionParams, WorkDoneProgressParams,
+    DocumentFormattingParams, DocumentRangeFormattingParams, FileRename, FormattingOptions,
+    GotoDefinitionParams, HoverParams, InlayHint, InlayHintLabel, InlayHintParams,
+    PartialResultParams, Position, Range, RenameFilesParams, TextDocumentItem,
+    TextDocumentPositionParams, WorkDoneProgressParams,
 };
 use rust_analyzer::lsp::ext::{OnEnter, Runnables, RunnablesParams};
 use serde_json::json;
@@ -660,6 +662,70 @@ fn main() {}
     );
 }
 
+#[test]
+fn test_format_document_range() {
+    if skip_slow_tests() {
+        return;
+    }
+
+    let server = Project::with_fixture(
+        r#"
+//- /Cargo.toml
+[package]
+name = "foo"
+version = "0.0.0"
+
+//- /src/lib.rs
+fn main() {
+    let unit_offsets_cache = collect(dwarf.units  ())  ?;
+}
+"#,
+    )
+    .with_config(serde_json::json!({
+        "rustfmt": {
+            "overrideCommand": [ "rustfmt", "+nightly", ],
+            "rangeFormatting": { "enable": true }
+        },
+    }))
+    .server()
+    .wait_until_workspace_is_loaded();
+
+    server.request::<RangeFormatting>(
+        DocumentRangeFormattingParams {
+            range: Range {
+                end: Position { line: 1, character: 0 },
+                start: Position { line: 1, character: 0 },
+            },
+            text_document: server.doc_id("src/lib.rs"),
+            options: FormattingOptions {
+                tab_size: 4,
+                insert_spaces: false,
+                insert_final_newline: None,
+                trim_final_newlines: None,
+                trim_trailing_whitespace: None,
+                properties: HashMap::new(),
+            },
+            work_done_progress_params: WorkDoneProgressParams::default(),
+        },
+        json!([
+            {
+                "newText": "",
+                "range": {
+                    "start": { "character": 48, "line": 1 },
+                    "end": { "character": 50, "line": 1 },
+                },
+            },
+            {
+                "newText": "",
+                "range": {
+                    "start": { "character": 53, "line": 1 },
+                    "end": { "character": 55, "line": 1 },
+                },
+            }
+        ]),
+    );
+}
+
 #[test]
 fn test_missing_module_code_action() {
     if skip_slow_tests() {
@@ -1086,7 +1152,11 @@ fn resolve_proc_macro() {
         &AbsPathBuf::assert_utf8(std::env::current_dir().unwrap()),
         &Default::default(),
     );
-    sysroot.load_workspace(&project_model::SysrootSourceWorkspaceConfig::default_cargo());
+    let loaded_sysroot =
+        sysroot.load_workspace(&project_model::RustSourceWorkspaceConfig::default_cargo());
+    if let Some(loaded_sysroot) = loaded_sysroot {
+        sysroot.set_workspace(loaded_sysroot);
+    }
 
     let proc_macro_server_path = sysroot.discover_proc_macro_srv().unwrap();
 
@@ -1372,6 +1442,40 @@ pub fn foo() {}
 name = "bar"
 version = "0.0.0"
 
+[dependencies]
+foo = { path = "../foo" }
+
+//- /bar/src/lib.rs
+"#,
+    )
+    .root("foo")
+    .root("bar")
+    .root("baz")
+    .with_config(json!({
+       "files": {
+           "exclude": ["foo"]
+        }
+    }))
+    .server()
+    .wait_until_workspace_is_loaded();
+
+    server.request::<WorkspaceSymbolRequest>(Default::default(), json!([]));
+
+    let server = Project::with_fixture(
+        r#"
+//- /foo/Cargo.toml
+[package]
+name = "foo"
+version = "0.0.0"
+
+//- /foo/src/lib.rs
+pub fn foo() {}
+
+//- /bar/Cargo.toml
+[package]
+name = "bar"
+version = "0.0.0"
+
 //- /bar/src/lib.rs
 pub fn bar() {}
 
@@ -1388,7 +1492,7 @@ version = "0.0.0"
     .root("baz")
     .with_config(json!({
        "files": {
-           "excludeDirs": ["foo", "bar"]
+           "exclude": ["foo", "bar"]
         }
     }))
     .server()
diff --git a/src/tools/rust-analyzer/crates/stdx/src/panic_context.rs b/src/tools/rust-analyzer/crates/stdx/src/panic_context.rs
index 4ec74c0742aa4..a35d50b78dfb6 100644
--- a/src/tools/rust-analyzer/crates/stdx/src/panic_context.rs
+++ b/src/tools/rust-analyzer/crates/stdx/src/panic_context.rs
@@ -1,28 +1,25 @@
 //! A micro-crate to enhance panic messages with context info.
-//!
-//! FIXME: upstream to <https://github.com/kriomant/panic-context> ?
 
 use std::{cell::RefCell, panic, sync::Once};
 
-pub fn enter(context: String) -> PanicContext {
-    static ONCE: Once = Once::new();
-    ONCE.call_once(PanicContext::init);
-
-    with_ctx(|ctx| ctx.push(context));
-    PanicContext { _priv: () }
-}
-
+/// Dummy for leveraging RAII cleanup to pop frames.
 #[must_use]
 pub struct PanicContext {
+    // prevent arbitrary construction
     _priv: (),
 }
 
-impl PanicContext {
+impl Drop for PanicContext {
+    fn drop(&mut self) {
+        with_ctx(|ctx| assert!(ctx.pop().is_some()));
+    }
+}
+
+pub fn enter(frame: String) -> PanicContext {
     #[allow(clippy::print_stderr)]
-    fn init() {
+    fn set_hook() {
         let default_hook = panic::take_hook();
-        #[allow(deprecated)]
-        let hook = move |panic_info: &panic::PanicInfo<'_>| {
+        panic::set_hook(Box::new(move |panic_info| {
             with_ctx(|ctx| {
                 if !ctx.is_empty() {
                     eprintln!("Panic context:");
@@ -30,17 +27,16 @@ impl PanicContext {
                         eprintln!("> {frame}\n");
                     }
                 }
-                default_hook(panic_info);
             });
-        };
-        panic::set_hook(Box::new(hook));
+            default_hook(panic_info);
+        }));
     }
-}
 
-impl Drop for PanicContext {
-    fn drop(&mut self) {
-        with_ctx(|ctx| assert!(ctx.pop().is_some()));
-    }
+    static SET_HOOK: Once = Once::new();
+    SET_HOOK.call_once(set_hook);
+
+    with_ctx(|ctx| ctx.push(frame));
+    PanicContext { _priv: () }
 }
 
 fn with_ctx(f: impl FnOnce(&mut Vec<String>)) {
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs
index 291fc646e2161..aedf810b79431 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs
@@ -710,52 +710,6 @@ impl ast::Fn {
     }
 }
 
-impl Removable for ast::MatchArm {
-    fn remove(&self) {
-        if let Some(sibling) = self.syntax().prev_sibling_or_token() {
-            if sibling.kind() == SyntaxKind::WHITESPACE {
-                ted::remove(sibling);
-            }
-        }
-        if let Some(sibling) = self.syntax().next_sibling_or_token() {
-            if sibling.kind() == T![,] {
-                ted::remove(sibling);
-            }
-        }
-        ted::remove(self.syntax());
-    }
-}
-
-impl ast::MatchArmList {
-    pub fn add_arm(&self, arm: ast::MatchArm) {
-        normalize_ws_between_braces(self.syntax());
-        let mut elements = Vec::new();
-        let position = match self.arms().last() {
-            Some(last_arm) => {
-                if needs_comma(&last_arm) {
-                    ted::append_child(last_arm.syntax(), make::token(SyntaxKind::COMMA));
-                }
-                Position::after(last_arm.syntax().clone())
-            }
-            None => match self.l_curly_token() {
-                Some(it) => Position::after(it),
-                None => Position::last_child_of(self.syntax()),
-            },
-        };
-        let indent = IndentLevel::from_node(self.syntax()) + 1;
-        elements.push(make::tokens::whitespace(&format!("\n{indent}")).into());
-        elements.push(arm.syntax().clone().into());
-        if needs_comma(&arm) {
-            ted::append_child(arm.syntax(), make::token(SyntaxKind::COMMA));
-        }
-        ted::insert_all(position, elements);
-
-        fn needs_comma(arm: &ast::MatchArm) -> bool {
-            arm.expr().is_some_and(|e| !e.is_block_like()) && arm.comma_token().is_none()
-        }
-    }
-}
-
 impl ast::LetStmt {
     pub fn set_ty(&self, ty: Option<ast::Type>) {
         match ty {
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
index ff027ac5848b3..9dc2d83253049 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
@@ -837,7 +837,8 @@ pub fn match_guard(condition: ast::Expr) -> ast::MatchGuard {
 
 pub fn match_arm_list(arms: impl IntoIterator<Item = ast::MatchArm>) -> ast::MatchArmList {
     let arms_str = arms.into_iter().fold(String::new(), |mut acc, arm| {
-        let needs_comma = arm.expr().is_none_or(|it| !it.is_block_like());
+        let needs_comma =
+            arm.comma_token().is_none() && arm.expr().is_none_or(|it| !it.is_block_like());
         let comma = if needs_comma { "," } else { "" };
         let arm = arm.syntax();
         format_to_acc!(acc, "    {arm}{comma}\n")
diff --git a/src/tools/rust-analyzer/crates/test-fixture/src/lib.rs b/src/tools/rust-analyzer/crates/test-fixture/src/lib.rs
index ca596583590a6..613f27c7958b4 100644
--- a/src/tools/rust-analyzer/crates/test-fixture/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/test-fixture/src/lib.rs
@@ -17,7 +17,7 @@ use hir_expand::{
     tt::{Leaf, TokenTree, TopSubtree, TopSubtreeBuilder, TtElement, TtIter},
     FileRange,
 };
-use intern::Symbol;
+use intern::{sym, Symbol};
 use rustc_hash::FxHashMap;
 use span::{Edition, EditionedFileId, FileId, Span};
 use stdx::itertools::Itertools;
@@ -511,6 +511,21 @@ pub fn issue_18898(_attr: TokenStream, input: TokenStream) -> TokenStream {
                 disabled: false,
             },
         ),
+        (
+            r#"
+#[proc_macro_attribute]
+pub fn disallow_cfg(_attr: TokenStream, input: TokenStream) -> TokenStream {
+    input
+}
+"#
+            .into(),
+            ProcMacro {
+                name: Symbol::intern("disallow_cfg"),
+                kind: ProcMacroKind::Attr,
+                expander: sync::Arc::new(DisallowCfgProcMacroExpander),
+                disabled: false,
+            },
+        ),
     ])
 }
 
@@ -865,3 +880,30 @@ impl ProcMacroExpander for Issue18898ProcMacroExpander {
         })
     }
 }
+
+// Reads ident type within string quotes, for issue #17479.
+#[derive(Debug)]
+struct DisallowCfgProcMacroExpander;
+impl ProcMacroExpander for DisallowCfgProcMacroExpander {
+    fn expand(
+        &self,
+        subtree: &TopSubtree,
+        _: Option<&TopSubtree>,
+        _: &Env,
+        _: Span,
+        _: Span,
+        _: Span,
+        _: Option<String>,
+    ) -> Result<TopSubtree, ProcMacroExpansionError> {
+        for tt in subtree.token_trees().flat_tokens() {
+            if let tt::TokenTree::Leaf(tt::Leaf::Ident(ident)) = tt {
+                if ident.sym == sym::cfg || ident.sym == sym::cfg_attr {
+                    return Err(ProcMacroExpansionError::Panic(
+                        "cfg or cfg_attr found in DisallowCfgProcMacroExpander".to_owned(),
+                    ));
+                }
+            }
+        }
+        Ok(subtree.clone())
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/test-utils/src/lib.rs b/src/tools/rust-analyzer/crates/test-utils/src/lib.rs
index 36be9937d3fea..e7279fa1f6617 100644
--- a/src/tools/rust-analyzer/crates/test-utils/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/test-utils/src/lib.rs
@@ -396,12 +396,19 @@ pub fn skip_slow_tests() -> bool {
     if should_skip {
         eprintln!("ignoring slow test");
     } else {
-        let path = project_root().join("./target/.slow_tests_cookie");
+        let path = target_dir().join(".slow_tests_cookie");
         fs::write(path, ".").unwrap();
     }
     should_skip
 }
 
+pub fn target_dir() -> Utf8PathBuf {
+    match std::env::var("CARGO_TARGET_DIR") {
+        Ok(target) => Utf8PathBuf::from(target),
+        Err(_) => project_root().join("target"),
+    }
+}
+
 /// Returns the path to the root directory of `rust-analyzer` project.
 pub fn project_root() -> Utf8PathBuf {
     let dir = env!("CARGO_MANIFEST_DIR");
diff --git a/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs b/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs
index 4ed68d18e8071..202afebde70fb 100644
--- a/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs
+++ b/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs
@@ -647,18 +647,21 @@ pub mod ops {
 
         #[lang = "fn"]
         #[fundamental]
+        #[rustc_paren_sugar]
         pub trait Fn<Args: Tuple>: FnMut<Args> {
             extern "rust-call" fn call(&self, args: Args) -> Self::Output;
         }
 
         #[lang = "fn_mut"]
         #[fundamental]
+        #[rustc_paren_sugar]
         pub trait FnMut<Args: Tuple>: FnOnce<Args> {
             extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output;
         }
 
         #[lang = "fn_once"]
         #[fundamental]
+        #[rustc_paren_sugar]
         pub trait FnOnce<Args: Tuple> {
             #[lang = "fn_once_output"]
             type Output;
@@ -736,12 +739,14 @@ pub mod ops {
 
         #[lang = "async_fn"]
         #[fundamental]
+        #[rustc_paren_sugar]
         pub trait AsyncFn<Args: Tuple>: AsyncFnMut<Args> {
             extern "rust-call" fn async_call(&self, args: Args) -> Self::CallRefFuture<'_>;
         }
 
         #[lang = "async_fn_mut"]
         #[fundamental]
+        #[rustc_paren_sugar]
         pub trait AsyncFnMut<Args: Tuple>: AsyncFnOnce<Args> {
             #[lang = "call_ref_future"]
             type CallRefFuture<'a>: Future<Output = Self::Output>
@@ -752,6 +757,7 @@ pub mod ops {
 
         #[lang = "async_fn_once"]
         #[fundamental]
+        #[rustc_paren_sugar]
         pub trait AsyncFnOnce<Args: Tuple> {
             #[lang = "async_fn_once_output"]
             type Output;
diff --git a/src/tools/rust-analyzer/crates/vfs-notify/src/lib.rs b/src/tools/rust-analyzer/crates/vfs-notify/src/lib.rs
index 0ae8b7baf464a..320033417640a 100644
--- a/src/tools/rust-analyzer/crates/vfs-notify/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/vfs-notify/src/lib.rs
@@ -280,8 +280,9 @@ impl NotifyActor {
                                 return false;
                             }
 
-                            root == path
-                                || dirs.exclude.iter().chain(&dirs.include).all(|it| it != path)
+                            // We want to filter out subdirectories that are roots themselves, because they will be visited separately.
+                            dirs.exclude.iter().all(|it| it != path)
+                                && (root == path || dirs.include.iter().all(|it| it != path))
                         });
 
                     let files = walkdir.filter_map(|it| it.ok()).filter_map(|entry| {
diff --git a/src/tools/rust-analyzer/crates/vfs/src/lib.rs b/src/tools/rust-analyzer/crates/vfs/src/lib.rs
index a26444e9ea230..3feca512e55a5 100644
--- a/src/tools/rust-analyzer/crates/vfs/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/vfs/src/lib.rs
@@ -100,6 +100,9 @@ pub enum FileState {
     Exists(u64),
     /// The file is deleted.
     Deleted,
+    /// The file was specifically excluded by the user. We still include excluded files
+    /// when they're opened (without their contents).
+    Excluded,
 }
 
 /// Changed file in the [`Vfs`].
@@ -164,10 +167,22 @@ pub enum ChangeKind {
     Delete,
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum FileExcluded {
+    Yes,
+    No,
+}
+
 impl Vfs {
     /// Id of the given path if it exists in the `Vfs` and is not deleted.
-    pub fn file_id(&self, path: &VfsPath) -> Option<FileId> {
-        self.interner.get(path).filter(|&it| matches!(self.get(it), FileState::Exists(_)))
+    pub fn file_id(&self, path: &VfsPath) -> Option<(FileId, FileExcluded)> {
+        let file_id = self.interner.get(path)?;
+        let file_state = self.get(file_id);
+        match file_state {
+            FileState::Exists(_) => Some((file_id, FileExcluded::No)),
+            FileState::Deleted => None,
+            FileState::Excluded => Some((file_id, FileExcluded::Yes)),
+        }
     }
 
     /// File path corresponding to the given `file_id`.
@@ -216,6 +231,7 @@ impl Vfs {
                 }
                 Change::Modify(v, new_hash)
             }
+            (FileState::Excluded, _) => return false,
         };
 
         let mut set_data = |change_kind| {
@@ -297,6 +313,13 @@ impl Vfs {
     fn get(&self, file_id: FileId) -> FileState {
         self.data[file_id.0 as usize]
     }
+
+    /// We cannot ignore excluded files, because this will lead to errors when the client
+    /// requests semantic information for them, so we instead mark them specially.
+    pub fn insert_excluded_file(&mut self, path: VfsPath) {
+        let file_id = self.alloc_file_id(path);
+        self.data[file_id.0 as usize] = FileState::Excluded;
+    }
 }
 
 impl fmt::Debug for Vfs {
diff --git a/src/tools/rust-analyzer/docs/book/README.md b/src/tools/rust-analyzer/docs/book/README.md
index a9d10df664355..043524b2341b7 100644
--- a/src/tools/rust-analyzer/docs/book/README.md
+++ b/src/tools/rust-analyzer/docs/book/README.md
@@ -26,4 +26,4 @@ Start with the mdbook [User Guide](https://rust-lang.github.io/mdBook/guide/inst
 Four sections are generated dynamically: assists, configuration, diagnostics and features. Their content is found in the `generated.md` files
 of the respective book section, for example `src/configuration_generated.md`, and are included in the book via mdbook's
 [include](https://rust-lang.github.io/mdBook/format/mdbook.html#including-files) functionality. Generated files can be rebuilt by running the various
-test cases that generate them, or by simply running all of the `rust-analyzer` tests with `cargo test`.
+test cases that generate them, or by simply running all of the `rust-analyzer` tests with `cargo test` and `cargo xtask codegen`.
diff --git a/src/tools/rust-analyzer/docs/book/book.toml b/src/tools/rust-analyzer/docs/book/book.toml
index ba3c1dede5db7..5ca4badde874c 100644
--- a/src/tools/rust-analyzer/docs/book/book.toml
+++ b/src/tools/rust-analyzer/docs/book/book.toml
@@ -9,10 +9,10 @@ title = "rust-analyzer"
 edition = "2021"
 
 [output.html]
-edit-url-template = "https://github.com/rust-lang/rust-analyzer/edit/master/manual/{path}"
-git-repository-url = "https://github.com/rust-lang/rust-analyzer/tree/master/manual"
+edit-url-template = "https://github.com/rust-lang/rust-analyzer/edit/master/docs/book/{path}"
+git-repository-url = "https://github.com/rust-lang/rust-analyzer/tree/master/docs/book"
 mathjax-support = true
-site-url = "/manual/"
+site-url = "/book/"
 
 [output.html.playground]
 editable = true
@@ -34,8 +34,3 @@ use-boolean-and = true
 [output.html.fold]
 enable = true
 level = 3
-
-[preprocessor.toc]
-command = "mdbook-toc"
-renderer = ["html"]
-max-level = 3
diff --git a/src/tools/rust-analyzer/docs/book/src/SUMMARY.md b/src/tools/rust-analyzer/docs/book/src/SUMMARY.md
index b3ed1e6df0a7a..9dc4f1f2d2a14 100644
--- a/src/tools/rust-analyzer/docs/book/src/SUMMARY.md
+++ b/src/tools/rust-analyzer/docs/book/src/SUMMARY.md
@@ -2,6 +2,9 @@
 
 - [Introduction](README.md)
 - [Installation](installation.md)
+  - [VS Code](vs_code.md)
+  - [rust-analyzer Binary](rust_analyzer_binary.md)
+  - [Other Editors](other_editors.md)
 - [Troubleshooting](troubleshooting.md)
 - [Configuration](configuration.md)
   - [Non-Cargo Based Projects](non_cargo_based_projects.md)
diff --git a/src/tools/rust-analyzer/docs/book/src/assists_generated.md b/src/tools/rust-analyzer/docs/book/src/assists_generated.md
new file mode 100644
index 0000000000000..3617badeef55b
--- /dev/null
+++ b/src/tools/rust-analyzer/docs/book/src/assists_generated.md
@@ -0,0 +1,3820 @@
+//! Generated by `cargo xtask codegen assists-doc-tests`, do not edit by hand.
+
+### `add_braces`
+**Source:**  [add_braces.rs](crates/ide-assists/src/handlers/add_braces.rs#8) 
+
+Adds braces to lambda and match arm expressions.
+
+#### Before
+```rust
+fn foo(n: i32) -> i32 {
+    match n {
+        1 =>┃ n + 1,
+        _ => 0
+    }
+}
+```
+
+#### After
+```rust
+fn foo(n: i32) -> i32 {
+    match n {
+        1 => {
+            n + 1
+        },
+        _ => 0
+    }
+}
+```
+
+
+### `add_explicit_type`
+**Source:**  [add_explicit_type.rs](crates/ide-assists/src/handlers/add_explicit_type.rs#7) 
+
+Specify type for a let binding.
+
+#### Before
+```rust
+fn main() {
+    let x┃ = 92;
+}
+```
+
+#### After
+```rust
+fn main() {
+    let x: i32 = 92;
+}
+```
+
+
+### `add_hash`
+**Source:**  [raw_string.rs](crates/ide-assists/src/handlers/raw_string.rs#89) 
+
+Adds a hash to a raw string literal.
+
+#### Before
+```rust
+fn main() {
+    r#"Hello,┃ World!"#;
+}
+```
+
+#### After
+```rust
+fn main() {
+    r##"Hello, World!"##;
+}
+```
+
+
+### `add_impl_default_members`
+**Source:**  [add_missing_impl_members.rs](crates/ide-assists/src/handlers/add_missing_impl_members.rs#58) 
+
+Adds scaffold for overriding default impl members.
+
+#### Before
+```rust
+trait Trait {
+    type X;
+    fn foo(&self);
+    fn bar(&self) {}
+}
+
+impl Trait for () {
+    type X = ();
+    fn foo(&self) {}┃
+}
+```
+
+#### After
+```rust
+trait Trait {
+    type X;
+    fn foo(&self);
+    fn bar(&self) {}
+}
+
+impl Trait for () {
+    type X = ();
+    fn foo(&self) {}
+
+    ┃fn bar(&self) {}
+}
+```
+
+
+### `add_impl_missing_members`
+**Source:**  [add_missing_impl_members.rs](crates/ide-assists/src/handlers/add_missing_impl_members.rs#16) 
+
+Adds scaffold for required impl members.
+
+#### Before
+```rust
+trait Trait<T> {
+    type X;
+    fn foo(&self) -> T;
+    fn bar(&self) {}
+}
+
+impl Trait<u32> for () {┃
+
+}
+```
+
+#### After
+```rust
+trait Trait<T> {
+    type X;
+    fn foo(&self) -> T;
+    fn bar(&self) {}
+}
+
+impl Trait<u32> for () {
+    ┃type X;
+
+    fn foo(&self) -> u32 {
+        todo!()
+    }
+}
+```
+
+
+### `add_label_to_loop`
+**Source:**  [add_label_to_loop.rs](crates/ide-assists/src/handlers/add_label_to_loop.rs#9) 
+
+Adds a label to a loop.
+
+#### Before
+```rust
+fn main() {
+    loop┃ {
+        break;
+        continue;
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    'l: loop {
+        break 'l;
+        continue 'l;
+    }
+}
+```
+
+
+### `add_lifetime_to_type`
+**Source:**  [add_lifetime_to_type.rs](crates/ide-assists/src/handlers/add_lifetime_to_type.rs#5) 
+
+Adds a new lifetime to a struct, enum or union.
+
+#### Before
+```rust
+struct Point {
+    x: &┃u32,
+    y: u32,
+}
+```
+
+#### After
+```rust
+struct Point<'a> {
+    x: &'a u32,
+    y: u32,
+}
+```
+
+
+### `add_missing_match_arms`
+**Source:**  [add_missing_match_arms.rs](crates/ide-assists/src/handlers/add_missing_match_arms.rs#14) 
+
+Adds missing clauses to a `match` expression.
+
+#### Before
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        ┃
+    }
+}
+```
+
+#### After
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move { distance } => ${1:todo!()},
+        Action::Stop => ${2:todo!()},┃
+    }
+}
+```
+
+
+### `add_return_type`
+**Source:**  [add_return_type.rs](crates/ide-assists/src/handlers/add_return_type.rs#6) 
+
+Adds the return type to a function or closure inferred from its tail expression if it doesn't have a return
+type specified. This assists is useable in a functions or closures tail expression or return type position.
+
+#### Before
+```rust
+fn foo() { 4┃2i32 }
+```
+
+#### After
+```rust
+fn foo() -> i32 { 42i32 }
+```
+
+
+### `add_turbo_fish`
+**Source:**  [add_turbo_fish.rs](crates/ide-assists/src/handlers/add_turbo_fish.rs#14) 
+
+Adds `::<_>` to a call of a generic method or function.
+
+#### Before
+```rust
+fn make<T>() -> T { todo!() }
+fn main() {
+    let x = make┃();
+}
+```
+
+#### After
+```rust
+fn make<T>() -> T { todo!() }
+fn main() {
+    let x = make::<${0:_}>();
+}
+```
+
+
+### `apply_demorgan`
+**Source:**  [apply_demorgan.rs](crates/ide-assists/src/handlers/apply_demorgan.rs#16) 
+
+Apply [De Morgan's law](https://en.wikipedia.org/wiki/De_Morgan%27s_laws).
+This transforms expressions of the form `!l || !r` into `!(l && r)`.
+This also works with `&&`. This assist can only be applied with the cursor
+on either `||` or `&&`.
+
+#### Before
+```rust
+fn main() {
+    if x != 4 ||┃ y < 3.14 {}
+}
+```
+
+#### After
+```rust
+fn main() {
+    if !(x == 4 && y >= 3.14) {}
+}
+```
+
+
+### `apply_demorgan_iterator`
+**Source:**  [apply_demorgan.rs](crates/ide-assists/src/handlers/apply_demorgan.rs#132) 
+
+Apply [De Morgan's law](https://en.wikipedia.org/wiki/De_Morgan%27s_laws) to
+`Iterator::all` and `Iterator::any`.
+
+This transforms expressions of the form `!iter.any(|x| predicate(x))` into
+`iter.all(|x| !predicate(x))` and vice versa. This also works the other way for
+`Iterator::all` into `Iterator::any`.
+
+#### Before
+```rust
+fn main() {
+    let arr = [1, 2, 3];
+    if !arr.into_iter().┃any(|num| num == 4) {
+        println!("foo");
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    let arr = [1, 2, 3];
+    if arr.into_iter().all(|num| num != 4) {
+        println!("foo");
+    }
+}
+```
+
+
+### `auto_import`
+**Source:**  [auto_import.rs](crates/ide-assists/src/handlers/auto_import.rs#73) 
+
+If the name is unresolved, provides all possible imports for it.
+
+#### Before
+```rust
+fn main() {
+    let map = HashMap┃::new();
+}
+```
+
+#### After
+```rust
+use std::collections::HashMap;
+
+fn main() {
+    let map = HashMap::new();
+}
+```
+
+
+### `bind_unused_param`
+**Source:**  [bind_unused_param.rs](crates/ide-assists/src/handlers/bind_unused_param.rs#12) 
+
+Binds unused function parameter to an underscore.
+
+#### Before
+```rust
+fn some_function(x: i32┃) {}
+```
+
+#### After
+```rust
+fn some_function(x: i32) {
+    let _ = x;
+}
+```
+
+
+### `bool_to_enum`
+**Source:**  [bool_to_enum.rs](crates/ide-assists/src/handlers/bool_to_enum.rs#29) 
+
+This converts boolean local variables, fields, constants, and statics into a new
+enum with two variants `Bool::True` and `Bool::False`, as well as replacing
+all assignments with the variants and replacing all usages with `== Bool::True` or
+`== Bool::False`.
+
+#### Before
+```rust
+fn main() {
+    let ┃bool = true;
+
+    if bool {
+        println!("foo");
+    }
+}
+```
+
+#### After
+```rust
+#[derive(PartialEq, Eq)]
+enum Bool { True, False }
+
+fn main() {
+    let bool = Bool::True;
+
+    if bool == Bool::True {
+        println!("foo");
+    }
+}
+```
+
+
+### `change_visibility`
+**Source:**  [change_visibility.rs](crates/ide-assists/src/handlers/change_visibility.rs#13) 
+
+Adds or changes existing visibility specifier.
+
+#### Before
+```rust
+┃fn frobnicate() {}
+```
+
+#### After
+```rust
+pub(crate) fn frobnicate() {}
+```
+
+
+### `comment_to_doc`
+**Source:**  [convert_comment_from_or_to_doc.rs](crates/ide-assists/src/handlers/convert_comment_from_or_to_doc.rs#9) 
+
+Converts comments to documentation.
+
+#### Before
+```rust
+// Wow what ┃a nice module
+// I sure hope this shows up when I hover over it
+```
+
+#### After
+```rust
+//! Wow what a nice module
+//! I sure hope this shows up when I hover over it
+```
+
+
+### `convert_bool_then_to_if`
+**Source:**  [convert_bool_then.rs](crates/ide-assists/src/handlers/convert_bool_then.rs#131) 
+
+Converts a `bool::then` method call to an equivalent if expression.
+
+#### Before
+```rust
+fn main() {
+    (0 == 0).then┃(|| val)
+}
+```
+
+#### After
+```rust
+fn main() {
+    if 0 == 0 {
+        Some(val)
+    } else {
+        None
+    }
+}
+```
+
+
+### `convert_closure_to_fn`
+**Source:**  [convert_closure_to_fn.rs](crates/ide-assists/src/handlers/convert_closure_to_fn.rs#25) 
+
+This converts a closure to a freestanding function, changing all captures to parameters.
+
+#### Before
+```rust
+fn main() {
+    let mut s = String::new();
+    let closure = |┃a| s.push_str(a);
+    closure("abc");
+}
+```
+
+#### After
+```rust
+fn main() {
+    let mut s = String::new();
+    fn closure(a: &str, s: &mut String) {
+        s.push_str(a)
+    }
+    closure("abc", &mut s);
+}
+```
+
+
+### `convert_for_loop_with_for_each`
+**Source:**  [convert_iter_for_each_to_for.rs](crates/ide-assists/src/handlers/convert_iter_for_each_to_for.rs#76) 
+
+Converts a for loop into a for_each loop on the Iterator.
+
+#### Before
+```rust
+fn main() {
+    let x = vec![1, 2, 3];
+    for┃ v in x {
+        let y = v * 2;
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    let x = vec![1, 2, 3];
+    x.into_iter().for_each(|v| {
+        let y = v * 2;
+    });
+}
+```
+
+
+### `convert_from_to_tryfrom`
+**Source:**  [convert_from_to_tryfrom.rs](crates/ide-assists/src/handlers/convert_from_to_tryfrom.rs#10) 
+
+Converts a From impl to a TryFrom impl, wrapping returns in `Ok`.
+
+#### Before
+```rust
+impl ┃From<usize> for Thing {
+    fn from(val: usize) -> Self {
+        Thing {
+            b: val.to_string(),
+            a: val
+        }
+    }
+}
+```
+
+#### After
+```rust
+impl TryFrom<usize> for Thing {
+    type Error = ${0:()};
+
+    fn try_from(val: usize) -> Result<Self, Self::Error> {
+        Ok(Thing {
+            b: val.to_string(),
+            a: val
+        })
+    }
+}
+```
+
+
+### `convert_if_to_bool_then`
+**Source:**  [convert_bool_then.rs](crates/ide-assists/src/handlers/convert_bool_then.rs#20) 
+
+Converts an if expression into a corresponding `bool::then` call.
+
+#### Before
+```rust
+fn main() {
+    if┃ cond {
+        Some(val)
+    } else {
+        None
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    cond.then(|| val)
+}
+```
+
+
+### `convert_integer_literal`
+**Source:**  [convert_integer_literal.rs](crates/ide-assists/src/handlers/convert_integer_literal.rs#5) 
+
+Converts the base of integer literals to other bases.
+
+#### Before
+```rust
+const _: i32 = 10┃;
+```
+
+#### After
+```rust
+const _: i32 = 0b1010;
+```
+
+
+### `convert_into_to_from`
+**Source:**  [convert_into_to_from.rs](crates/ide-assists/src/handlers/convert_into_to_from.rs#8) 
+
+Converts an Into impl to an equivalent From impl.
+
+#### Before
+```rust
+impl ┃Into<Thing> for usize {
+    fn into(self) -> Thing {
+        Thing {
+            b: self.to_string(),
+            a: self
+        }
+    }
+}
+```
+
+#### After
+```rust
+impl From<usize> for Thing {
+    fn from(val: usize) -> Self {
+        Thing {
+            b: val.to_string(),
+            a: val
+        }
+    }
+}
+```
+
+
+### `convert_iter_for_each_to_for`
+**Source:**  [convert_iter_for_each_to_for.rs](crates/ide-assists/src/handlers/convert_iter_for_each_to_for.rs#11) 
+
+Converts an Iterator::for_each function into a for loop.
+
+#### Before
+```rust
+fn main() {
+    let iter = iter::repeat((9, 2));
+    iter.for_each┃(|(x, y)| {
+        println!("x: {}, y: {}", x, y);
+    });
+}
+```
+
+#### After
+```rust
+fn main() {
+    let iter = iter::repeat((9, 2));
+    for (x, y) in iter {
+        println!("x: {}, y: {}", x, y);
+    }
+}
+```
+
+
+### `convert_let_else_to_match`
+**Source:**  [convert_let_else_to_match.rs](crates/ide-assists/src/handlers/convert_let_else_to_match.rs#9) 
+
+Converts let-else statement to let statement and match expression.
+
+#### Before
+```rust
+fn main() {
+    let Ok(mut x) = f() else┃ { return };
+}
+```
+
+#### After
+```rust
+fn main() {
+    let mut x = match f() {
+        Ok(x) => x,
+        _ => return,
+    };
+}
+```
+
+
+### `convert_match_to_let_else`
+**Source:**  [convert_match_to_let_else.rs](crates/ide-assists/src/handlers/convert_match_to_let_else.rs#12) 
+
+Converts let statement with match initializer to let-else statement.
+
+#### Before
+```rust
+fn foo(opt: Option<()>) {
+    let val┃ = match opt {
+        Some(it) => it,
+        None => return,
+    };
+}
+```
+
+#### After
+```rust
+fn foo(opt: Option<()>) {
+    let Some(val) = opt else { return };
+}
+```
+
+
+### `convert_named_struct_to_tuple_struct`
+**Source:**  [convert_named_struct_to_tuple_struct.rs](crates/ide-assists/src/handlers/convert_named_struct_to_tuple_struct.rs#11) 
+
+Converts struct with named fields to tuple struct, and analogously for enum variants with named
+fields.
+
+#### Before
+```rust
+struct Point┃ { x: f32, y: f32 }
+
+impl Point {
+    pub fn new(x: f32, y: f32) -> Self {
+        Point { x, y }
+    }
+
+    pub fn x(&self) -> f32 {
+        self.x
+    }
+
+    pub fn y(&self) -> f32 {
+        self.y
+    }
+}
+```
+
+#### After
+```rust
+struct Point(f32, f32);
+
+impl Point {
+    pub fn new(x: f32, y: f32) -> Self {
+        Point(x, y)
+    }
+
+    pub fn x(&self) -> f32 {
+        self.0
+    }
+
+    pub fn y(&self) -> f32 {
+        self.1
+    }
+}
+```
+
+
+### `convert_nested_function_to_closure`
+**Source:**  [convert_nested_function_to_closure.rs](crates/ide-assists/src/handlers/convert_nested_function_to_closure.rs#7) 
+
+Converts a function that is defined within the body of another function into a closure.
+
+#### Before
+```rust
+fn main() {
+    fn fo┃o(label: &str, number: u64) {
+        println!("{}: {}", label, number);
+    }
+
+    foo("Bar", 100);
+}
+```
+
+#### After
+```rust
+fn main() {
+    let foo = |label: &str, number: u64| {
+        println!("{}: {}", label, number);
+    };
+
+    foo("Bar", 100);
+}
+```
+
+
+### `convert_to_guarded_return`
+**Source:**  [convert_to_guarded_return.rs](crates/ide-assists/src/handlers/convert_to_guarded_return.rs#24) 
+
+Replace a large conditional with a guarded return.
+
+#### Before
+```rust
+fn main() {
+    ┃if cond {
+        foo();
+        bar();
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    if !cond {
+        return;
+    }
+    foo();
+    bar();
+}
+```
+
+
+### `convert_tuple_return_type_to_struct`
+**Source:**  [convert_tuple_return_type_to_struct.rs](crates/ide-assists/src/handlers/convert_tuple_return_type_to_struct.rs#20) 
+
+This converts the return type of a function from a tuple type
+into a tuple struct and updates the body accordingly.
+
+#### Before
+```rust
+fn bar() {
+    let (a, b, c) = foo();
+}
+
+fn foo() -> (┃u32, u32, u32) {
+    (1, 2, 3)
+}
+```
+
+#### After
+```rust
+fn bar() {
+    let FooResult(a, b, c) = foo();
+}
+
+struct FooResult(u32, u32, u32);
+
+fn foo() -> FooResult {
+    FooResult(1, 2, 3)
+}
+```
+
+
+### `convert_tuple_struct_to_named_struct`
+**Source:**  [convert_tuple_struct_to_named_struct.rs](crates/ide-assists/src/handlers/convert_tuple_struct_to_named_struct.rs#10) 
+
+Converts tuple struct to struct with named fields, and analogously for tuple enum variants.
+
+#### Before
+```rust
+struct Point┃(f32, f32);
+
+impl Point {
+    pub fn new(x: f32, y: f32) -> Self {
+        Point(x, y)
+    }
+
+    pub fn x(&self) -> f32 {
+        self.0
+    }
+
+    pub fn y(&self) -> f32 {
+        self.1
+    }
+}
+```
+
+#### After
+```rust
+struct Point { field1: f32, field2: f32 }
+
+impl Point {
+    pub fn new(x: f32, y: f32) -> Self {
+        Point { field1: x, field2: y }
+    }
+
+    pub fn x(&self) -> f32 {
+        self.field1
+    }
+
+    pub fn y(&self) -> f32 {
+        self.field2
+    }
+}
+```
+
+
+### `convert_two_arm_bool_match_to_matches_macro`
+**Source:**  [convert_two_arm_bool_match_to_matches_macro.rs](crates/ide-assists/src/handlers/convert_two_arm_bool_match_to_matches_macro.rs#8) 
+
+Convert 2-arm match that evaluates to a boolean into the equivalent matches! invocation.
+
+#### Before
+```rust
+fn main() {
+    match scrutinee┃ {
+        Some(val) if val.cond() => true,
+        _ => false,
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    matches!(scrutinee, Some(val) if val.cond())
+}
+```
+
+
+### `convert_while_to_loop`
+**Source:**  [convert_while_to_loop.rs](crates/ide-assists/src/handlers/convert_while_to_loop.rs#20) 
+
+Replace a while with a loop.
+
+#### Before
+```rust
+fn main() {
+    ┃while cond {
+        foo();
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    loop {
+        if !cond {
+            break;
+        }
+        foo();
+    }
+}
+```
+
+
+### `destructure_struct_binding`
+**Source:**  [destructure_struct_binding.rs](crates/ide-assists/src/handlers/destructure_struct_binding.rs#18) 
+
+Destructures a struct binding in place.
+
+#### Before
+```rust
+struct Foo {
+    bar: i32,
+    baz: i32,
+}
+fn main() {
+    let ┃foo = Foo { bar: 1, baz: 2 };
+    let bar2 = foo.bar;
+    let baz2 = &foo.baz;
+}
+```
+
+#### After
+```rust
+struct Foo {
+    bar: i32,
+    baz: i32,
+}
+fn main() {
+    let Foo { bar, baz } = Foo { bar: 1, baz: 2 };
+    let bar2 = bar;
+    let baz2 = &baz;
+}
+```
+
+
+### `destructure_tuple_binding`
+**Source:**  [destructure_tuple_binding.rs](crates/ide-assists/src/handlers/destructure_tuple_binding.rs#19) 
+
+Destructures a tuple binding in place.
+
+#### Before
+```rust
+fn main() {
+    let ┃t = (1,2);
+    let v = t.0;
+}
+```
+
+#### After
+```rust
+fn main() {
+    let (┃_0, _1) = (1,2);
+    let v = _0;
+}
+```
+
+
+### `desugar_async_into_impl_future`
+**Source:**  [toggle_async_sugar.rs](crates/ide-assists/src/handlers/toggle_async_sugar.rs#103) 
+
+Rewrites asynchronous function from `async fn` into `-> impl Future`.
+This action does not touch the function body and therefore `0`
+block does not transform to `async { 0 }`.
+
+#### Before
+```rust
+pub as┃ync fn foo() -> usize {
+    0
+}
+```
+
+#### After
+```rust
+pub fn foo() -> impl core::future::Future<Output = usize> {
+    0
+}
+```
+
+
+### `desugar_doc_comment`
+**Source:**  [desugar_doc_comment.rs](crates/ide-assists/src/handlers/desugar_doc_comment.rs#14) 
+
+Desugars doc-comments to the attribute form.
+
+#### Before
+```rust
+/// Multi-line┃
+/// comment
+```
+
+#### After
+```rust
+#[doc = r"Multi-line
+comment"]
+```
+
+
+### `expand_glob_import`
+**Source:**  [expand_glob_import.rs](crates/ide-assists/src/handlers/expand_glob_import.rs#18) 
+
+Expands glob imports.
+
+#### Before
+```rust
+mod foo {
+    pub struct Bar;
+    pub struct Baz;
+}
+
+use foo::*┃;
+
+fn qux(bar: Bar, baz: Baz) {}
+```
+
+#### After
+```rust
+mod foo {
+    pub struct Bar;
+    pub struct Baz;
+}
+
+use foo::{Bar, Baz};
+
+fn qux(bar: Bar, baz: Baz) {}
+```
+
+
+### `explicit_enum_discriminant`
+**Source:**  [explicit_enum_discriminant.rs](crates/ide-assists/src/handlers/explicit_enum_discriminant.rs#11) 
+
+Adds explicit discriminant to all enum variants.
+
+#### Before
+```rust
+enum TheEnum┃ {
+    Foo,
+    Bar,
+    Baz = 42,
+    Quux,
+}
+```
+
+#### After
+```rust
+enum TheEnum {
+    Foo = 0,
+    Bar = 1,
+    Baz = 42,
+    Quux = 43,
+}
+```
+
+
+### `extract_constant`
+**Source:**  [extract_variable.rs](crates/ide-assists/src/handlers/extract_variable.rs#35) 
+
+Extracts subexpression into a constant.
+
+#### Before
+```rust
+fn main() {
+    ┃(1 + 2)┃ * 4;
+}
+```
+
+#### After
+```rust
+fn main() {
+    const ┃VAR_NAME: i32 = 1 + 2;
+    VAR_NAME * 4;
+}
+```
+
+
+### `extract_expressions_from_format_string`
+**Source:**  [extract_expressions_from_format_string.rs](crates/ide-assists/src/handlers/extract_expressions_from_format_string.rs#14) 
+
+Move an expression out of a format string.
+
+#### Before
+```rust
+fn main() {
+    print!("{var} {x + 1}┃");
+}
+```
+
+#### After
+```rust
+fn main() {
+    print!("{var} {}"┃, x + 1);
+}
+```
+
+
+### `extract_function`
+**Source:**  [extract_function.rs](crates/ide-assists/src/handlers/extract_function.rs#39) 
+
+Extracts selected statements and comments into new function.
+
+#### Before
+```rust
+fn main() {
+    let n = 1;
+    ┃let m = n + 2;
+    // calculate
+    let k = m + n;┃
+    let g = 3;
+}
+```
+
+#### After
+```rust
+fn main() {
+    let n = 1;
+    fun_name(n);
+    let g = 3;
+}
+
+fn ┃fun_name(n: i32) {
+    let m = n + 2;
+    // calculate
+    let k = m + n;
+}
+```
+
+
+### `extract_module`
+**Source:**  [extract_module.rs](crates/ide-assists/src/handlers/extract_module.rs#29) 
+
+Extracts a selected region as separate module. All the references, visibility and imports are
+resolved.
+
+#### Before
+```rust
+┃fn foo(name: i32) -> i32 {
+    name + 1
+}┃
+
+fn bar(name: i32) -> i32 {
+    name + 2
+}
+```
+
+#### After
+```rust
+mod modname {
+    pub(crate) fn foo(name: i32) -> i32 {
+        name + 1
+    }
+}
+
+fn bar(name: i32) -> i32 {
+    name + 2
+}
+```
+
+
+### `extract_static`
+**Source:**  [extract_variable.rs](crates/ide-assists/src/handlers/extract_variable.rs#52) 
+
+Extracts subexpression into a static.
+
+#### Before
+```rust
+fn main() {
+    ┃(1 + 2)┃ * 4;
+}
+```
+
+#### After
+```rust
+fn main() {
+    static ┃VAR_NAME: i32 = 1 + 2;
+    VAR_NAME * 4;
+}
+```
+
+
+### `extract_struct_from_enum_variant`
+**Source:**  [extract_struct_from_enum_variant.rs](crates/ide-assists/src/handlers/extract_struct_from_enum_variant.rs#26) 
+
+Extracts a struct from enum variant.
+
+#### Before
+```rust
+enum A { ┃One(u32, u32) }
+```
+
+#### After
+```rust
+struct One(u32, u32);
+
+enum A { One(One) }
+```
+
+
+### `extract_type_alias`
+**Source:**  [extract_type_alias.rs](crates/ide-assists/src/handlers/extract_type_alias.rs#10) 
+
+Extracts the selected type as a type alias.
+
+#### Before
+```rust
+struct S {
+    field: ┃(u8, u8, u8)┃,
+}
+```
+
+#### After
+```rust
+type ┃Type = (u8, u8, u8);
+
+struct S {
+    field: Type,
+}
+```
+
+
+### `extract_variable`
+**Source:**  [extract_variable.rs](crates/ide-assists/src/handlers/extract_variable.rs#18) 
+
+Extracts subexpression into a variable.
+
+#### Before
+```rust
+fn main() {
+    ┃(1 + 2)┃ * 4;
+}
+```
+
+#### After
+```rust
+fn main() {
+    let ┃var_name = 1 + 2;
+    var_name * 4;
+}
+```
+
+
+### `fill_record_pattern_fields`
+**Source:**  [fill_record_pattern_fields.rs](crates/ide-assists/src/handlers/fill_record_pattern_fields.rs#8) 
+
+Fills fields by replacing rest pattern in record patterns.
+
+#### Before
+```rust
+struct Bar { y: Y, z: Z }
+
+fn foo(bar: Bar) {
+    let Bar { ..┃ } = bar;
+}
+```
+
+#### After
+```rust
+struct Bar { y: Y, z: Z }
+
+fn foo(bar: Bar) {
+    let Bar { y, z  } = bar;
+}
+```
+
+
+### `fix_visibility`
+**Source:**  [fix_visibility.rs](crates/ide-assists/src/handlers/fix_visibility.rs#14) 
+
+Makes inaccessible item public.
+
+#### Before
+```rust
+mod m {
+    fn frobnicate() {}
+}
+fn main() {
+    m::frobnicate┃();
+}
+```
+
+#### After
+```rust
+mod m {
+    ┃pub(crate) fn frobnicate() {}
+}
+fn main() {
+    m::frobnicate();
+}
+```
+
+
+### `flip_binexpr`
+**Source:**  [flip_binexpr.rs](crates/ide-assists/src/handlers/flip_binexpr.rs#8) 
+
+Flips operands of a binary expression.
+
+#### Before
+```rust
+fn main() {
+    let _ = 90 +┃ 2;
+}
+```
+
+#### After
+```rust
+fn main() {
+    let _ = 2 + 90;
+}
+```
+
+
+### `flip_comma`
+**Source:**  [flip_comma.rs](crates/ide-assists/src/handlers/flip_comma.rs#10) 
+
+Flips two comma-separated items.
+
+#### Before
+```rust
+fn main() {
+    ((1, 2),┃ (3, 4));
+}
+```
+
+#### After
+```rust
+fn main() {
+    ((3, 4), (1, 2));
+}
+```
+
+
+### `flip_trait_bound`
+**Source:**  [flip_trait_bound.rs](crates/ide-assists/src/handlers/flip_trait_bound.rs#9) 
+
+Flips two trait bounds.
+
+#### Before
+```rust
+fn foo<T: Clone +┃ Copy>() { }
+```
+
+#### After
+```rust
+fn foo<T: Copy + Clone>() { }
+```
+
+
+### `generate_constant`
+**Source:**  [generate_constant.rs](crates/ide-assists/src/handlers/generate_constant.rs#14) 
+
+Generate a named constant.
+
+#### Before
+```rust
+struct S { i: usize }
+impl S { pub fn new(n: usize) {} }
+fn main() {
+    let v = S::new(CAPA┃CITY);
+}
+```
+
+#### After
+```rust
+struct S { i: usize }
+impl S { pub fn new(n: usize) {} }
+fn main() {
+    const CAPACITY: usize = ┃;
+    let v = S::new(CAPACITY);
+}
+```
+
+
+### `generate_default_from_enum_variant`
+**Source:**  [generate_default_from_enum_variant.rs](crates/ide-assists/src/handlers/generate_default_from_enum_variant.rs#6) 
+
+Adds a Default impl for an enum using a variant.
+
+#### Before
+```rust
+enum Version {
+ Undefined,
+ Minor┃,
+ Major,
+}
+```
+
+#### After
+```rust
+enum Version {
+ Undefined,
+ Minor,
+ Major,
+}
+
+impl Default for Version {
+    fn default() -> Self {
+        Self::Minor
+    }
+}
+```
+
+
+### `generate_default_from_new`
+**Source:**  [generate_default_from_new.rs](crates/ide-assists/src/handlers/generate_default_from_new.rs#13) 
+
+Generates default implementation from new method.
+
+#### Before
+```rust
+struct Example { _inner: () }
+
+impl Example {
+    pub fn n┃ew() -> Self {
+        Self { _inner: () }
+    }
+}
+```
+
+#### After
+```rust
+struct Example { _inner: () }
+
+impl Example {
+    pub fn new() -> Self {
+        Self { _inner: () }
+    }
+}
+
+impl Default for Example {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+```
+
+
+### `generate_delegate_methods`
+**Source:**  [generate_delegate_methods.rs](crates/ide-assists/src/handlers/generate_delegate_methods.rs#15) 
+
+Generate delegate methods.
+
+#### Before
+```rust
+struct Age(u8);
+impl Age {
+    fn age(&self) -> u8 {
+        self.0
+    }
+}
+
+struct Person {
+    ag┃e: Age,
+}
+```
+
+#### After
+```rust
+struct Age(u8);
+impl Age {
+    fn age(&self) -> u8 {
+        self.0
+    }
+}
+
+struct Person {
+    age: Age,
+}
+
+impl Person {
+    ┃fn age(&self) -> u8 {
+        self.age.age()
+    }
+}
+```
+
+
+### `generate_delegate_trait`
+**Source:**  [generate_delegate_trait.rs](crates/ide-assists/src/handlers/generate_delegate_trait.rs#29) 
+
+Generate delegate trait implementation for `StructField`s.
+
+#### Before
+```rust
+trait SomeTrait {
+    type T;
+    fn fn_(arg: u32) -> u32;
+    fn method_(&mut self) -> bool;
+}
+struct A;
+impl SomeTrait for A {
+    type T = u32;
+
+    fn fn_(arg: u32) -> u32 {
+        42
+    }
+
+    fn method_(&mut self) -> bool {
+        false
+    }
+}
+struct B {
+    a┃: A,
+}
+```
+
+#### After
+```rust
+trait SomeTrait {
+    type T;
+    fn fn_(arg: u32) -> u32;
+    fn method_(&mut self) -> bool;
+}
+struct A;
+impl SomeTrait for A {
+    type T = u32;
+
+    fn fn_(arg: u32) -> u32 {
+        42
+    }
+
+    fn method_(&mut self) -> bool {
+        false
+    }
+}
+struct B {
+    a: A,
+}
+
+impl SomeTrait for B {
+    type T = <A as SomeTrait>::T;
+
+    fn fn_(arg: u32) -> u32 {
+        <A as SomeTrait>::fn_(arg)
+    }
+
+    fn method_(&mut self) -> bool {
+        <A as SomeTrait>::method_(&mut self.a)
+    }
+}
+```
+
+
+### `generate_deref`
+**Source:**  [generate_deref.rs](crates/ide-assists/src/handlers/generate_deref.rs#16) 
+
+Generate `Deref` impl using the given struct field.
+
+#### Before
+```rust
+struct A;
+struct B {
+   ┃a: A
+}
+```
+
+#### After
+```rust
+struct A;
+struct B {
+   a: A
+}
+
+impl core::ops::Deref for B {
+    type Target = A;
+
+    fn deref(&self) -> &Self::Target {
+        &self.a
+    }
+}
+```
+
+
+### `generate_derive`
+**Source:**  [generate_derive.rs](crates/ide-assists/src/handlers/generate_derive.rs#8) 
+
+Adds a new `#[derive()]` clause to a struct or enum.
+
+#### Before
+```rust
+struct Point {
+    x: u32,
+    y: u32,┃
+}
+```
+
+#### After
+```rust
+#[derive(┃)]
+struct Point {
+    x: u32,
+    y: u32,
+}
+```
+
+
+### `generate_doc_example`
+**Source:**  [generate_documentation_template.rs](crates/ide-assists/src/handlers/generate_documentation_template.rs#76) 
+
+Generates a rustdoc example when editing an item's documentation.
+
+#### Before
+```rust
+/// Adds two numbers.┃
+pub fn add(a: i32, b: i32) -> i32 { a + b }
+```
+
+#### After
+```rust
+/// Adds two numbers.
+///
+/// # Examples
+///
+/// ```
+/// use ra_test_fixture::add;
+///
+/// assert_eq!(add(a, b), );
+/// ```
+pub fn add(a: i32, b: i32) -> i32 { a + b }
+```
+
+
+### `generate_documentation_template`
+**Source:**  [generate_documentation_template.rs](crates/ide-assists/src/handlers/generate_documentation_template.rs#13) 
+
+Adds a documentation template above a function definition / declaration.
+
+#### Before
+```rust
+pub struct S;
+impl S {
+    pub unsafe fn set_len┃(&mut self, len: usize) -> Result<(), std::io::Error> {
+        /* ... */
+    }
+}
+```
+
+#### After
+```rust
+pub struct S;
+impl S {
+    /// Sets the length of this [`S`].
+    ///
+    /// # Errors
+    ///
+    /// This function will return an error if .
+    ///
+    /// # Safety
+    ///
+    /// .
+    pub unsafe fn set_len(&mut self, len: usize) -> Result<(), std::io::Error> {
+        /* ... */
+    }
+}
+```
+
+
+### `generate_enum_as_method`
+**Source:**  [generate_enum_projection_method.rs](crates/ide-assists/src/handlers/generate_enum_projection_method.rs#59) 
+
+Generate an `as_` method for this enum variant.
+
+#### Before
+```rust
+enum Value {
+ Number(i32),
+ Text(String)┃,
+}
+```
+
+#### After
+```rust
+enum Value {
+ Number(i32),
+ Text(String),
+}
+
+impl Value {
+    fn as_text(&self) -> Option<&String> {
+        if let Self::Text(v) = self {
+            Some(v)
+        } else {
+            None
+        }
+    }
+}
+```
+
+
+### `generate_enum_is_method`
+**Source:**  [generate_enum_is_method.rs](crates/ide-assists/src/handlers/generate_enum_is_method.rs#11) 
+
+Generate an `is_` method for this enum variant.
+
+#### Before
+```rust
+enum Version {
+ Undefined,
+ Minor┃,
+ Major,
+}
+```
+
+#### After
+```rust
+enum Version {
+ Undefined,
+ Minor,
+ Major,
+}
+
+impl Version {
+    /// Returns `true` if the version is [`Minor`].
+    ///
+    /// [`Minor`]: Version::Minor
+    #[must_use]
+    fn is_minor(&self) -> bool {
+        matches!(self, Self::Minor)
+    }
+}
+```
+
+
+### `generate_enum_try_into_method`
+**Source:**  [generate_enum_projection_method.rs](crates/ide-assists/src/handlers/generate_enum_projection_method.rs#12) 
+
+Generate a `try_into_` method for this enum variant.
+
+#### Before
+```rust
+enum Value {
+ Number(i32),
+ Text(String)┃,
+}
+```
+
+#### After
+```rust
+enum Value {
+ Number(i32),
+ Text(String),
+}
+
+impl Value {
+    fn try_into_text(self) -> Result<String, Self> {
+        if let Self::Text(v) = self {
+            Ok(v)
+        } else {
+            Err(self)
+        }
+    }
+}
+```
+
+
+### `generate_enum_variant`
+**Source:**  [generate_enum_variant.rs](crates/ide-assists/src/handlers/generate_enum_variant.rs#10) 
+
+Adds a variant to an enum.
+
+#### Before
+```rust
+enum Countries {
+    Ghana,
+}
+
+fn main() {
+    let country = Countries::Lesotho┃;
+}
+```
+
+#### After
+```rust
+enum Countries {
+    Ghana,
+    Lesotho,
+}
+
+fn main() {
+    let country = Countries::Lesotho;
+}
+```
+
+
+### `generate_fn_type_alias_named`
+**Source:**  [generate_fn_type_alias.rs](crates/ide-assists/src/handlers/generate_fn_type_alias.rs#10) 
+
+Generate a type alias for the function with named parameters.
+
+#### Before
+```rust
+unsafe fn fo┃o(n: i32) -> i32 { 42i32 }
+```
+
+#### After
+```rust
+type ${0:FooFn} = unsafe fn(n: i32) -> i32;
+
+unsafe fn foo(n: i32) -> i32 { 42i32 }
+```
+
+
+### `generate_fn_type_alias_unnamed`
+**Source:**  [generate_fn_type_alias.rs](crates/ide-assists/src/handlers/generate_fn_type_alias.rs#24) 
+
+Generate a type alias for the function with unnamed parameters.
+
+#### Before
+```rust
+unsafe fn fo┃o(n: i32) -> i32 { 42i32 }
+```
+
+#### After
+```rust
+type ${0:FooFn} = unsafe fn(i32) -> i32;
+
+unsafe fn foo(n: i32) -> i32 { 42i32 }
+```
+
+
+### `generate_from_impl_for_enum`
+**Source:**  [generate_from_impl_for_enum.rs](crates/ide-assists/src/handlers/generate_from_impl_for_enum.rs#8) 
+
+Adds a From impl for this enum variant with one tuple field.
+
+#### Before
+```rust
+enum A { ┃One(u32) }
+```
+
+#### After
+```rust
+enum A { One(u32) }
+
+impl From<u32> for A {
+    fn from(v: u32) -> Self {
+        Self::One(v)
+    }
+}
+```
+
+
+### `generate_function`
+**Source:**  [generate_function.rs](crates/ide-assists/src/handlers/generate_function.rs#28) 
+
+Adds a stub function with a signature matching the function under the cursor.
+
+#### Before
+```rust
+struct Baz;
+fn baz() -> Baz { Baz }
+fn foo() {
+    bar┃("", baz());
+}
+
+```
+
+#### After
+```rust
+struct Baz;
+fn baz() -> Baz { Baz }
+fn foo() {
+    bar("", baz());
+}
+
+fn bar(arg: &str, baz: Baz) ${0:-> _} {
+    todo!()
+}
+
+```
+
+
+### `generate_getter`
+**Source:**  [generate_getter_or_setter.rs](crates/ide-assists/src/handlers/generate_getter_or_setter.rs#73) 
+
+Generate a getter method.
+
+#### Before
+```rust
+struct Person {
+    nam┃e: String,
+}
+```
+
+#### After
+```rust
+struct Person {
+    name: String,
+}
+
+impl Person {
+    fn ┃name(&self) -> &str {
+        &self.name
+    }
+}
+```
+
+
+### `generate_getter_mut`
+**Source:**  [generate_getter_or_setter.rs](crates/ide-assists/src/handlers/generate_getter_or_setter.rs#127) 
+
+Generate a mut getter method.
+
+#### Before
+```rust
+struct Person {
+    nam┃e: String,
+}
+```
+
+#### After
+```rust
+struct Person {
+    name: String,
+}
+
+impl Person {
+    fn ┃name_mut(&mut self) -> &mut String {
+        &mut self.name
+    }
+}
+```
+
+
+### `generate_impl`
+**Source:**  [generate_impl.rs](crates/ide-assists/src/handlers/generate_impl.rs#20) 
+
+Adds a new inherent impl for a type.
+
+#### Before
+```rust
+struct Ctx┃<T: Clone> {
+    data: T,
+}
+```
+
+#### After
+```rust
+struct Ctx<T: Clone> {
+    data: T,
+}
+
+impl<T: Clone> Ctx<T> {┃}
+```
+
+
+### `generate_is_empty_from_len`
+**Source:**  [generate_is_empty_from_len.rs](crates/ide-assists/src/handlers/generate_is_empty_from_len.rs#12) 
+
+Generates is_empty implementation from the len method.
+
+#### Before
+```rust
+struct MyStruct { data: Vec<String> }
+
+impl MyStruct {
+    #[must_use]
+    p┃ub fn len(&self) -> usize {
+        self.data.len()
+    }
+}
+```
+
+#### After
+```rust
+struct MyStruct { data: Vec<String> }
+
+impl MyStruct {
+    #[must_use]
+    pub fn len(&self) -> usize {
+        self.data.len()
+    }
+
+    #[must_use]
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+}
+```
+
+
+### `generate_mut_trait_impl`
+**Source:**  [generate_mut_trait_impl.rs](crates/ide-assists/src/handlers/generate_mut_trait_impl.rs#12) 
+
+Adds a IndexMut impl from the `Index` trait.
+
+#### Before
+```rust
+pub enum Axis { X = 0, Y = 1, Z = 2 }
+
+impl<T> core::ops::Index┃<Axis> for [T; 3] {
+    type Output = T;
+
+    fn index(&self, index: Axis) -> &Self::Output {
+        &self[index as usize]
+    }
+}
+```
+
+#### After
+```rust
+pub enum Axis { X = 0, Y = 1, Z = 2 }
+
+┃impl<T> core::ops::IndexMut<Axis> for [T; 3] {
+    fn index_mut(&mut self, index: Axis) -> &mut Self::Output {
+        &self[index as usize]
+    }
+}
+
+impl<T> core::ops::Index<Axis> for [T; 3] {
+    type Output = T;
+
+    fn index(&self, index: Axis) -> &Self::Output {
+        &self[index as usize]
+    }
+}
+```
+
+
+### `generate_new`
+**Source:**  [generate_new.rs](crates/ide-assists/src/handlers/generate_new.rs#14) 
+
+Adds a `fn new` for a type.
+
+#### Before
+```rust
+struct Ctx<T: Clone> {
+     data: T,┃
+}
+```
+
+#### After
+```rust
+struct Ctx<T: Clone> {
+     data: T,
+}
+
+impl<T: Clone> Ctx<T> {
+    fn ┃new(data: T) -> Self {
+        Self { data }
+    }
+}
+```
+
+
+### `generate_setter`
+**Source:**  [generate_getter_or_setter.rs](crates/ide-assists/src/handlers/generate_getter_or_setter.rs#13) 
+
+Generate a setter method.
+
+#### Before
+```rust
+struct Person {
+    nam┃e: String,
+}
+```
+
+#### After
+```rust
+struct Person {
+    name: String,
+}
+
+impl Person {
+    fn ┃set_name(&mut self, name: String) {
+        self.name = name;
+    }
+}
+```
+
+
+### `generate_trait_from_impl`
+**Source:**  [generate_trait_from_impl.rs](crates/ide-assists/src/handlers/generate_trait_from_impl.rs#18) 
+
+Generate trait for an already defined inherent impl and convert impl to a trait impl.
+
+#### Before
+```rust
+struct Foo<const N: usize>([i32; N]);
+
+macro_rules! const_maker {
+    ($t:ty, $v:tt) => {
+        const CONST: $t = $v;
+    };
+}
+
+impl<const N: usize> Fo┃o<N> {
+    // Used as an associated constant.
+    const CONST_ASSOC: usize = N * 4;
+
+    fn create() -> Option<()> {
+        Some(())
+    }
+
+    const_maker! {i32, 7}
+}
+```
+
+#### After
+```rust
+struct Foo<const N: usize>([i32; N]);
+
+macro_rules! const_maker {
+    ($t:ty, $v:tt) => {
+        const CONST: $t = $v;
+    };
+}
+
+trait ${0:NewTrait}<const N: usize> {
+    // Used as an associated constant.
+    const CONST_ASSOC: usize = N * 4;
+
+    fn create() -> Option<()>;
+
+    const_maker! {i32, 7}
+}
+
+impl<const N: usize> ${0:NewTrait}<N> for Foo<N> {
+    // Used as an associated constant.
+    const CONST_ASSOC: usize = N * 4;
+
+    fn create() -> Option<()> {
+        Some(())
+    }
+
+    const_maker! {i32, 7}
+}
+```
+
+
+### `generate_trait_impl`
+**Source:**  [generate_impl.rs](crates/ide-assists/src/handlers/generate_impl.rs#66) 
+
+Adds a new trait impl for a type.
+
+#### Before
+```rust
+struct ┃Ctx<T: Clone> {
+    data: T,
+}
+```
+
+#### After
+```rust
+struct Ctx<T: Clone> {
+    data: T,
+}
+
+impl<T: Clone> ${0:_} for Ctx<T> {}
+```
+
+
+### `inline_call`
+**Source:**  [inline_call.rs](crates/ide-assists/src/handlers/inline_call.rs#170) 
+
+Inlines a function or method body creating a `let` statement per parameter unless the parameter
+can be inlined. The parameter will be inlined either if it the supplied argument is a simple local
+or if the parameter is only accessed inside the function body once.
+
+#### Before
+```rust
+fn foo(name: Option<&str>) {
+    let name = name.unwrap┃();
+}
+```
+
+#### After
+```rust
+fn foo(name: Option<&str>) {
+    let name = match name {
+            Some(val) => val,
+            None => panic!("called `Option::unwrap()` on a `None` value"),
+        };
+}
+```
+
+
+### `inline_const_as_literal`
+**Source:**  [inline_const_as_literal.rs](crates/ide-assists/src/handlers/inline_const_as_literal.rs#6) 
+
+Evaluate and inline const variable as literal.
+
+#### Before
+```rust
+const STRING: &str = "Hello, World!";
+
+fn something() -> &'static str {
+    STRING┃
+}
+```
+
+#### After
+```rust
+const STRING: &str = "Hello, World!";
+
+fn something() -> &'static str {
+    "Hello, World!"
+}
+```
+
+
+### `inline_into_callers`
+**Source:**  [inline_call.rs](crates/ide-assists/src/handlers/inline_call.rs#32) 
+
+Inline a function or method body into all of its callers where possible, creating a `let` statement per parameter
+unless the parameter can be inlined. The parameter will be inlined either if it the supplied argument is a simple local
+or if the parameter is only accessed inside the function body once.
+If all calls can be inlined the function will be removed.
+
+#### Before
+```rust
+fn print(_: &str) {}
+fn foo┃(word: &str) {
+    if !word.is_empty() {
+        print(word);
+    }
+}
+fn bar() {
+    foo("안녕하세요");
+    foo("여러분");
+}
+```
+
+#### After
+```rust
+fn print(_: &str) {}
+
+fn bar() {
+    {
+        let word: &str = "안녕하세요";
+        if !word.is_empty() {
+            print(word);
+        }
+    };
+    {
+        let word: &str = "여러분";
+        if !word.is_empty() {
+            print(word);
+        }
+    };
+}
+```
+
+
+### `inline_local_variable`
+**Source:**  [inline_local_variable.rs](crates/ide-assists/src/handlers/inline_local_variable.rs#17) 
+
+Inlines a local variable.
+
+#### Before
+```rust
+fn main() {
+    let x┃ = 1 + 2;
+    x * 4;
+}
+```
+
+#### After
+```rust
+fn main() {
+    (1 + 2) * 4;
+}
+```
+
+
+### `inline_macro`
+**Source:**  [inline_macro.rs](crates/ide-assists/src/handlers/inline_macro.rs#7) 
+
+Takes a macro and inlines it one step.
+
+#### Before
+```rust
+macro_rules! num {
+    (+$($t:tt)+) => (1 + num!($($t )+));
+    (-$($t:tt)+) => (-1 + num!($($t )+));
+    (+) => (1);
+    (-) => (-1);
+}
+
+fn main() {
+    let number = num┃!(+ + + - + +);
+    println!("{number}");
+}
+```
+
+#### After
+```rust
+macro_rules! num {
+    (+$($t:tt)+) => (1 + num!($($t )+));
+    (-$($t:tt)+) => (-1 + num!($($t )+));
+    (+) => (1);
+    (-) => (-1);
+}
+
+fn main() {
+    let number = 1+num!(+ + - + +);
+    println!("{number}");
+}
+```
+
+
+### `inline_type_alias`
+**Source:**  [inline_type_alias.rs](crates/ide-assists/src/handlers/inline_type_alias.rs#106) 
+
+Replace a type alias with its concrete type.
+
+#### Before
+```rust
+type A<T = u32> = Vec<T>;
+
+fn main() {
+    let a: ┃A;
+}
+```
+
+#### After
+```rust
+type A<T = u32> = Vec<T>;
+
+fn main() {
+    let a: Vec<u32>;
+}
+```
+
+
+### `inline_type_alias_uses`
+**Source:**  [inline_type_alias.rs](crates/ide-assists/src/handlers/inline_type_alias.rs#24) 
+
+Inline a type alias into all of its uses where possible.
+
+#### Before
+```rust
+type ┃A = i32;
+fn id(x: A) -> A {
+    x
+};
+fn foo() {
+    let _: A = 3;
+}
+```
+
+#### After
+```rust
+
+fn id(x: i32) -> i32 {
+    x
+};
+fn foo() {
+    let _: i32 = 3;
+}
+```
+
+
+### `into_to_qualified_from`
+**Source:**  [into_to_qualified_from.rs](crates/ide-assists/src/handlers/into_to_qualified_from.rs#10) 
+
+Convert an `into` method call to a fully qualified `from` call.
+
+#### Before
+```rust
+//- minicore: from
+struct B;
+impl From<i32> for B {
+    fn from(a: i32) -> Self {
+       B
+    }
+}
+
+fn main() -> () {
+    let a = 3;
+    let b: B = a.in┃to();
+}
+```
+
+#### After
+```rust
+struct B;
+impl From<i32> for B {
+    fn from(a: i32) -> Self {
+       B
+    }
+}
+
+fn main() -> () {
+    let a = 3;
+    let b: B = B::from(a);
+}
+```
+
+
+### `introduce_named_generic`
+**Source:**  [introduce_named_generic.rs](crates/ide-assists/src/handlers/introduce_named_generic.rs#7) 
+
+Replaces `impl Trait` function argument with the named generic.
+
+#### Before
+```rust
+fn foo(bar: ┃impl Bar) {}
+```
+
+#### After
+```rust
+fn foo<┃B: Bar>(bar: B) {}
+```
+
+
+### `introduce_named_lifetime`
+**Source:**  [introduce_named_lifetime.rs](crates/ide-assists/src/handlers/introduce_named_lifetime.rs#13) 
+
+Change an anonymous lifetime to a named lifetime.
+
+#### Before
+```rust
+impl Cursor<'_┃> {
+    fn node(self) -> &SyntaxNode {
+        match self {
+            Cursor::Replace(node) | Cursor::Before(node) => node,
+        }
+    }
+}
+```
+
+#### After
+```rust
+impl<'a> Cursor<'a> {
+    fn node(self) -> &SyntaxNode {
+        match self {
+            Cursor::Replace(node) | Cursor::Before(node) => node,
+        }
+    }
+}
+```
+
+
+### `invert_if`
+**Source:**  [invert_if.rs](crates/ide-assists/src/handlers/invert_if.rs#13) 
+
+This transforms if expressions of the form `if !x {A} else {B}` into `if x {B} else {A}`
+This also works with `!=`. This assist can only be applied with the cursor on `if`.
+
+#### Before
+```rust
+fn main() {
+    if┃ !y { A } else { B }
+}
+```
+
+#### After
+```rust
+fn main() {
+    if y { B } else { A }
+}
+```
+
+
+### `line_to_block`
+**Source:**  [convert_comment_block.rs](crates/ide-assists/src/handlers/convert_comment_block.rs#9) 
+
+Converts comments between block and single-line form.
+
+#### Before
+```rust
+   // Multi-line┃
+   // comment
+```
+
+#### After
+```rust
+  /*
+  Multi-line
+  comment
+  */
+```
+
+
+### `make_raw_string`
+**Source:**  [raw_string.rs](crates/ide-assists/src/handlers/raw_string.rs#7) 
+
+Adds `r#` to a plain string literal.
+
+#### Before
+```rust
+fn main() {
+    "Hello,┃ World!";
+}
+```
+
+#### After
+```rust
+fn main() {
+    r#"Hello, World!"#;
+}
+```
+
+
+### `make_usual_string`
+**Source:**  [raw_string.rs](crates/ide-assists/src/handlers/raw_string.rs#47) 
+
+Turns a raw string into a plain string.
+
+#### Before
+```rust
+fn main() {
+    r#"Hello,┃ "World!""#;
+}
+```
+
+#### After
+```rust
+fn main() {
+    "Hello, \"World!\"";
+}
+```
+
+
+### `merge_imports`
+**Source:**  [merge_imports.rs](crates/ide-assists/src/handlers/merge_imports.rs#21) 
+
+Merges neighbor imports with a common prefix.
+
+#### Before
+```rust
+use std::┃fmt::Formatter;
+use std::io;
+```
+
+#### After
+```rust
+use std::{fmt::Formatter, io};
+```
+
+
+### `merge_match_arms`
+**Source:**  [merge_match_arms.rs](crates/ide-assists/src/handlers/merge_match_arms.rs#12) 
+
+Merges the current match arm with the following if their bodies are identical.
+
+#### Before
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        ┃Action::Move(..) => foo(),
+        Action::Stop => foo(),
+    }
+}
+```
+
+#### After
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move(..) | Action::Stop => foo(),
+    }
+}
+```
+
+
+### `merge_nested_if`
+**Source:**  [merge_nested_if.rs](crates/ide-assists/src/handlers/merge_nested_if.rs#11) 
+
+This transforms if expressions of the form `if x { if y {A} }` into `if x && y {A}`
+This assist can only be applied with the cursor on `if`.
+
+#### Before
+```rust
+fn main() {
+   i┃f x == 3 { if y == 4 { 1 } }
+}
+```
+
+#### After
+```rust
+fn main() {
+   if x == 3 && y == 4 { 1 }
+}
+```
+
+
+### `move_arm_cond_to_match_guard`
+**Source:**  [move_guard.rs](crates/ide-assists/src/handlers/move_guard.rs#69) 
+
+Moves if expression from match arm body into a guard.
+
+#### Before
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move { distance } => ┃if distance > 10 { foo() },
+        _ => (),
+    }
+}
+```
+
+#### After
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move { distance } if distance > 10 => foo(),
+        _ => (),
+    }
+}
+```
+
+
+### `move_bounds_to_where_clause`
+**Source:**  [move_bounds.rs](crates/ide-assists/src/handlers/move_bounds.rs#12) 
+
+Moves inline type bounds to a where clause.
+
+#### Before
+```rust
+fn apply<T, U, ┃F: FnOnce(T) -> U>(f: F, x: T) -> U {
+    f(x)
+}
+```
+
+#### After
+```rust
+fn apply<T, U, F>(f: F, x: T) -> U where F: FnOnce(T) -> U {
+    f(x)
+}
+```
+
+
+### `move_const_to_impl`
+**Source:**  [move_const_to_impl.rs](crates/ide-assists/src/handlers/move_const_to_impl.rs#14) 
+
+Move a local constant item in a method to impl's associated constant. All the references will be
+qualified with `Self::`.
+
+#### Before
+```rust
+struct S;
+impl S {
+    fn foo() -> usize {
+        /// The answer.
+        const C┃: usize = 42;
+
+        C * C
+    }
+}
+```
+
+#### After
+```rust
+struct S;
+impl S {
+    /// The answer.
+    const C: usize = 42;
+
+    fn foo() -> usize {
+        Self::C * Self::C
+    }
+}
+```
+
+
+### `move_from_mod_rs`
+**Source:**  [move_from_mod_rs.rs](crates/ide-assists/src/handlers/move_from_mod_rs.rs#12) 
+
+Moves xxx/mod.rs to xxx.rs.
+
+#### Before
+```rust
+//- /main.rs
+mod a;
+//- /a/mod.rs
+┃fn t() {}┃
+```
+
+#### After
+```rust
+fn t() {}
+```
+
+
+### `move_guard_to_arm_body`
+**Source:**  [move_guard.rs](crates/ide-assists/src/handlers/move_guard.rs#8) 
+
+Moves match guard into match arm body.
+
+#### Before
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move { distance } ┃if distance > 10 => foo(),
+        _ => (),
+    }
+}
+```
+
+#### After
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move { distance } => if distance > 10 {
+            foo()
+        },
+        _ => (),
+    }
+}
+```
+
+
+### `move_module_to_file`
+**Source:**  [move_module_to_file.rs](crates/ide-assists/src/handlers/move_module_to_file.rs#15) 
+
+Moves inline module's contents to a separate file.
+
+#### Before
+```rust
+mod ┃foo {
+    fn t() {}
+}
+```
+
+#### After
+```rust
+mod foo;
+```
+
+
+### `move_to_mod_rs`
+**Source:**  [move_to_mod_rs.rs](crates/ide-assists/src/handlers/move_to_mod_rs.rs#12) 
+
+Moves xxx.rs to xxx/mod.rs.
+
+#### Before
+```rust
+//- /main.rs
+mod a;
+//- /a.rs
+┃fn t() {}┃
+```
+
+#### After
+```rust
+fn t() {}
+```
+
+
+### `normalize_import`
+**Source:**  [normalize_import.rs](crates/ide-assists/src/handlers/normalize_import.rs#9) 
+
+Normalizes an import.
+
+#### Before
+```rust
+use┃ std::{io, {fmt::Formatter}};
+```
+
+#### After
+```rust
+use std::{fmt::Formatter, io};
+```
+
+
+### `promote_local_to_const`
+**Source:**  [promote_local_to_const.rs](crates/ide-assists/src/handlers/promote_local_to_const.rs#17) 
+
+Promotes a local variable to a const item changing its name to a `SCREAMING_SNAKE_CASE` variant
+if the local uses no non-const expressions.
+
+#### Before
+```rust
+fn main() {
+    let foo┃ = true;
+
+    if foo {
+        println!("It's true");
+    } else {
+        println!("It's false");
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    const ┃FOO: bool = true;
+
+    if FOO {
+        println!("It's true");
+    } else {
+        println!("It's false");
+    }
+}
+```
+
+
+### `pull_assignment_up`
+**Source:**  [pull_assignment_up.rs](crates/ide-assists/src/handlers/pull_assignment_up.rs#11) 
+
+Extracts variable assignment to outside an if or match statement.
+
+#### Before
+```rust
+fn main() {
+    let mut foo = 6;
+
+    if true {
+        ┃foo = 5;
+    } else {
+        foo = 4;
+    }
+}
+```
+
+#### After
+```rust
+fn main() {
+    let mut foo = 6;
+
+    foo = if true {
+        5
+    } else {
+        4
+    };
+}
+```
+
+
+### `qualify_method_call`
+**Source:**  [qualify_method_call.rs](crates/ide-assists/src/handlers/qualify_method_call.rs#10) 
+
+Replaces the method call with a qualified function call.
+
+#### Before
+```rust
+struct Foo;
+impl Foo {
+    fn foo(&self) {}
+}
+fn main() {
+    let foo = Foo;
+    foo.fo┃o();
+}
+```
+
+#### After
+```rust
+struct Foo;
+impl Foo {
+    fn foo(&self) {}
+}
+fn main() {
+    let foo = Foo;
+    Foo::foo(&foo);
+}
+```
+
+
+### `qualify_path`
+**Source:**  [qualify_path.rs](crates/ide-assists/src/handlers/qualify_path.rs#24) 
+
+If the name is unresolved, provides all possible qualified paths for it.
+
+#### Before
+```rust
+fn main() {
+    let map = HashMap┃::new();
+}
+```
+
+#### After
+```rust
+fn main() {
+    let map = std::collections::HashMap::new();
+}
+```
+
+
+### `reformat_number_literal`
+**Source:**  [number_representation.rs](crates/ide-assists/src/handlers/number_representation.rs#7) 
+
+Adds or removes separators from integer literal.
+
+#### Before
+```rust
+const _: i32 = 1012345┃;
+```
+
+#### After
+```rust
+const _: i32 = 1_012_345;
+```
+
+
+### `remove_dbg`
+**Source:**  [remove_dbg.rs](crates/ide-assists/src/handlers/remove_dbg.rs#9) 
+
+Removes `dbg!()` macro call.
+
+#### Before
+```rust
+fn main() {
+    let x = ┃dbg!(42 * dbg!(4 + 2));┃
+}
+```
+
+#### After
+```rust
+fn main() {
+    let x = 42 * (4 + 2);
+}
+```
+
+
+### `remove_hash`
+**Source:**  [raw_string.rs](crates/ide-assists/src/handlers/raw_string.rs#117) 
+
+Removes a hash from a raw string literal.
+
+#### Before
+```rust
+fn main() {
+    r#"Hello,┃ World!"#;
+}
+```
+
+#### After
+```rust
+fn main() {
+    r"Hello, World!";
+}
+```
+
+
+### `remove_mut`
+**Source:**  [remove_mut.rs](crates/ide-assists/src/handlers/remove_mut.rs#5) 
+
+Removes the `mut` keyword.
+
+#### Before
+```rust
+impl Walrus {
+    fn feed(&mut┃ self, amount: u32) {}
+}
+```
+
+#### After
+```rust
+impl Walrus {
+    fn feed(&self, amount: u32) {}
+}
+```
+
+
+### `remove_parentheses`
+**Source:**  [remove_parentheses.rs](crates/ide-assists/src/handlers/remove_parentheses.rs#5) 
+
+Removes redundant parentheses.
+
+#### Before
+```rust
+fn main() {
+    _ = ┃(2) + 2;
+}
+```
+
+#### After
+```rust
+fn main() {
+    _ = 2 + 2;
+}
+```
+
+
+### `remove_unused_imports`
+**Source:**  [remove_unused_imports.rs](crates/ide-assists/src/handlers/remove_unused_imports.rs#17) 
+
+Removes any use statements in the current selection that are unused.
+
+#### Before
+```rust
+struct X();
+mod foo {
+    use super::X┃;
+}
+```
+
+#### After
+```rust
+struct X();
+mod foo {
+}
+```
+
+
+### `remove_unused_param`
+**Source:**  [remove_unused_param.rs](crates/ide-assists/src/handlers/remove_unused_param.rs#15) 
+
+Removes unused function parameter.
+
+#### Before
+```rust
+fn frobnicate(x: i32┃) {}
+
+fn main() {
+    frobnicate(92);
+}
+```
+
+#### After
+```rust
+fn frobnicate() {}
+
+fn main() {
+    frobnicate();
+}
+```
+
+
+### `reorder_fields`
+**Source:**  [reorder_fields.rs](crates/ide-assists/src/handlers/reorder_fields.rs#8) 
+
+Reorder the fields of record literals and record patterns in the same order as in
+the definition.
+
+#### Before
+```rust
+struct Foo {foo: i32, bar: i32};
+const test: Foo = ┃Foo {bar: 0, foo: 1}
+```
+
+#### After
+```rust
+struct Foo {foo: i32, bar: i32};
+const test: Foo = Foo {foo: 1, bar: 0}
+```
+
+
+### `reorder_impl_items`
+**Source:**  [reorder_impl_items.rs](crates/ide-assists/src/handlers/reorder_impl_items.rs#11) 
+
+Reorder the items of an `impl Trait`. The items will be ordered
+in the same order as in the trait definition.
+
+#### Before
+```rust
+trait Foo {
+    type A;
+    const B: u8;
+    fn c();
+}
+
+struct Bar;
+┃impl Foo for Bar┃ {
+    const B: u8 = 17;
+    fn c() {}
+    type A = String;
+}
+```
+
+#### After
+```rust
+trait Foo {
+    type A;
+    const B: u8;
+    fn c();
+}
+
+struct Bar;
+impl Foo for Bar {
+    type A = String;
+    const B: u8 = 17;
+    fn c() {}
+}
+```
+
+
+### `replace_arith_with_checked`
+**Source:**  [replace_arith_op.rs](crates/ide-assists/src/handlers/replace_arith_op.rs#9) 
+
+Replaces arithmetic on integers with the `checked_*` equivalent.
+
+#### Before
+```rust
+fn main() {
+  let x = 1 ┃+ 2;
+}
+```
+
+#### After
+```rust
+fn main() {
+  let x = 1.checked_add(2);
+}
+```
+
+
+### `replace_arith_with_saturating`
+**Source:**  [replace_arith_op.rs](crates/ide-assists/src/handlers/replace_arith_op.rs#28) 
+
+Replaces arithmetic on integers with the `saturating_*` equivalent.
+
+#### Before
+```rust
+fn main() {
+  let x = 1 ┃+ 2;
+}
+```
+
+#### After
+```rust
+fn main() {
+  let x = 1.saturating_add(2);
+}
+```
+
+
+### `replace_arith_with_wrapping`
+**Source:**  [replace_arith_op.rs](crates/ide-assists/src/handlers/replace_arith_op.rs#50) 
+
+Replaces arithmetic on integers with the `wrapping_*` equivalent.
+
+#### Before
+```rust
+fn main() {
+  let x = 1 ┃+ 2;
+}
+```
+
+#### After
+```rust
+fn main() {
+  let x = 1.wrapping_add(2);
+}
+```
+
+
+### `replace_char_with_string`
+**Source:**  [replace_string_with_char.rs](crates/ide-assists/src/handlers/replace_string_with_char.rs#51) 
+
+Replace a char literal with a string literal.
+
+#### Before
+```rust
+fn main() {
+    find('{┃');
+}
+```
+
+#### After
+```rust
+fn main() {
+    find("{");
+}
+```
+
+
+### `replace_derive_with_manual_impl`
+**Source:**  [replace_derive_with_manual_impl.rs](crates/ide-assists/src/handlers/replace_derive_with_manual_impl.rs#20) 
+
+Converts a `derive` impl into a manual one.
+
+#### Before
+```rust
+#[derive(Deb┃ug, Display)]
+struct S;
+```
+
+#### After
+```rust
+#[derive(Display)]
+struct S;
+
+impl Debug for S {
+    ┃fn fmt(&self, f: &mut Formatter) -> Result<()> {
+        f.debug_struct("S").finish()
+    }
+}
+```
+
+
+### `replace_if_let_with_match`
+**Source:**  [replace_if_let_with_match.rs](crates/ide-assists/src/handlers/replace_if_let_with_match.rs#20) 
+
+Replaces a `if let` expression with a `match` expression.
+
+#### Before
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    ┃if let Action::Move { distance } = action {
+        foo(distance)
+    } else {
+        bar()
+    }
+}
+```
+
+#### After
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move { distance } => foo(distance),
+        _ => bar(),
+    }
+}
+```
+
+
+### `replace_is_some_with_if_let_some`
+**Source:**  [replace_is_method_with_if_let_method.rs](crates/ide-assists/src/handlers/replace_is_method_with_if_let_method.rs#9) 
+
+Replace `if x.is_some()` with `if let Some(_tmp) = x` or `if x.is_ok()` with `if let Ok(_tmp) = x`.
+
+#### Before
+```rust
+fn main() {
+    let x = Some(1);
+    if x.is_som┃e() {}
+}
+```
+
+#### After
+```rust
+fn main() {
+    let x = Some(1);
+    if let Some(${0:x1}) = x {}
+}
+```
+
+
+### `replace_let_with_if_let`
+**Source:**  [replace_let_with_if_let.rs](crates/ide-assists/src/handlers/replace_let_with_if_let.rs#9) 
+
+Replaces `let` with an `if let`.
+
+#### Before
+```rust
+
+fn main(action: Action) {
+    ┃let x = compute();
+}
+
+fn compute() -> Option<i32> { None }
+```
+
+#### After
+```rust
+
+fn main(action: Action) {
+    if let Some(x) = compute() {
+    }
+}
+
+fn compute() -> Option<i32> { None }
+```
+
+
+### `replace_match_with_if_let`
+**Source:**  [replace_if_let_with_match.rs](crates/ide-assists/src/handlers/replace_if_let_with_match.rs#188) 
+
+Replaces a binary `match` with a wildcard pattern and no guards with an `if let` expression.
+
+#### Before
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    ┃match action {
+        Action::Move { distance } => foo(distance),
+        _ => bar(),
+    }
+}
+```
+
+#### After
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    if let Action::Move { distance } = action {
+        foo(distance)
+    } else {
+        bar()
+    }
+}
+```
+
+
+### `replace_named_generic_with_impl`
+**Source:**  [replace_named_generic_with_impl.rs](crates/ide-assists/src/handlers/replace_named_generic_with_impl.rs#18) 
+
+Replaces named generic with an `impl Trait` in function argument.
+
+#### Before
+```rust
+fn new<P┃: AsRef<Path>>(location: P) -> Self {}
+```
+
+#### After
+```rust
+fn new(location: impl AsRef<Path>) -> Self {}
+```
+
+
+### `replace_qualified_name_with_use`
+**Source:**  [replace_qualified_name_with_use.rs](crates/ide-assists/src/handlers/replace_qualified_name_with_use.rs#13) 
+
+Adds a use statement for a given fully-qualified name.
+
+#### Before
+```rust
+fn process(map: std::collections::┃HashMap<String, String>) {}
+```
+
+#### After
+```rust
+use std::collections::HashMap;
+
+fn process(map: HashMap<String, String>) {}
+```
+
+
+### `replace_string_with_char`
+**Source:**  [replace_string_with_char.rs](crates/ide-assists/src/handlers/replace_string_with_char.rs#11) 
+
+Replace string literal with char literal.
+
+#### Before
+```rust
+fn main() {
+    find("{┃");
+}
+```
+
+#### After
+```rust
+fn main() {
+    find('{');
+}
+```
+
+
+### `replace_try_expr_with_match`
+**Source:**  [replace_try_expr_with_match.rs](crates/ide-assists/src/handlers/replace_try_expr_with_match.rs#18) 
+
+Replaces a `try` expression with a `match` expression.
+
+#### Before
+```rust
+fn handle() {
+    let pat = Some(true)┃?;
+}
+```
+
+#### After
+```rust
+fn handle() {
+    let pat = match Some(true) {
+        Some(it) => it,
+        None => return None,
+    };
+}
+```
+
+
+### `replace_turbofish_with_explicit_type`
+**Source:**  [replace_turbofish_with_explicit_type.rs](crates/ide-assists/src/handlers/replace_turbofish_with_explicit_type.rs#12) 
+
+Converts `::<_>` to an explicit type assignment.
+
+#### Before
+```rust
+fn make<T>() -> T { ) }
+fn main() {
+    let a = make┃::<i32>();
+}
+```
+
+#### After
+```rust
+fn make<T>() -> T { ) }
+fn main() {
+    let a: i32 = make();
+}
+```
+
+
+### `replace_with_eager_method`
+**Source:**  [replace_method_eager_lazy.rs](crates/ide-assists/src/handlers/replace_method_eager_lazy.rs#89) 
+
+Replace `unwrap_or_else` with `unwrap_or` and `ok_or_else` with `ok_or`.
+
+#### Before
+```rust
+fn foo() {
+    let a = Some(1);
+    a.unwra┃p_or_else(|| 2);
+}
+```
+
+#### After
+```rust
+fn foo() {
+    let a = Some(1);
+    a.unwrap_or(2);
+}
+```
+
+
+### `replace_with_lazy_method`
+**Source:**  [replace_method_eager_lazy.rs](crates/ide-assists/src/handlers/replace_method_eager_lazy.rs#9) 
+
+Replace `unwrap_or` with `unwrap_or_else` and `ok_or` with `ok_or_else`.
+
+#### Before
+```rust
+fn foo() {
+    let a = Some(1);
+    a.unwra┃p_or(2);
+}
+```
+
+#### After
+```rust
+fn foo() {
+    let a = Some(1);
+    a.unwrap_or_else(|| 2);
+}
+```
+
+
+### `sort_items`
+**Source:**  [sort_items.rs](crates/ide-assists/src/handlers/sort_items.rs#12) 
+
+Sorts item members alphabetically: fields, enum variants and methods.
+
+#### Before
+```rust
+struct ┃Foo┃ { second: u32, first: String }
+```
+
+#### After
+```rust
+struct Foo { first: String, second: u32 }
+```
+
+---
+
+#### Before
+```rust
+trait ┃Bar┃ {
+    fn second(&self) -> u32;
+    fn first(&self) -> String;
+}
+```
+
+#### After
+```rust
+trait Bar {
+    fn first(&self) -> String;
+    fn second(&self) -> u32;
+}
+```
+
+---
+
+#### Before
+```rust
+struct Baz;
+impl ┃Baz┃ {
+    fn second(&self) -> u32;
+    fn first(&self) -> String;
+}
+```
+
+#### After
+```rust
+struct Baz;
+impl Baz {
+    fn first(&self) -> String;
+    fn second(&self) -> u32;
+}
+```
+
+---
+There is a difference between sorting enum variants:
+
+#### Before
+```rust
+enum ┃Animal┃ {
+  Dog(String, f64),
+  Cat { weight: f64, name: String },
+}
+```
+
+#### After
+```rust
+enum Animal {
+  Cat { weight: f64, name: String },
+  Dog(String, f64),
+}
+```
+
+and sorting a single enum struct variant:
+
+#### Before
+```rust
+enum Animal {
+  Dog(String, f64),
+  Cat ┃{ weight: f64, name: String }┃,
+}
+```
+
+#### After
+```rust
+enum Animal {
+  Dog(String, f64),
+  Cat { name: String, weight: f64 },
+}
+```
+
+
+### `split_import`
+**Source:**  [split_import.rs](crates/ide-assists/src/handlers/split_import.rs#5) 
+
+Wraps the tail of import into braces.
+
+#### Before
+```rust
+use std::┃collections::HashMap;
+```
+
+#### After
+```rust
+use std::{collections::HashMap};
+```
+
+
+### `sugar_impl_future_into_async`
+**Source:**  [toggle_async_sugar.rs](crates/ide-assists/src/handlers/toggle_async_sugar.rs#13) 
+
+Rewrites asynchronous function from `-> impl Future` into `async fn`.
+This action does not touch the function body and therefore `async { 0 }`
+block does not transform to just `0`.
+
+#### Before
+```rust
+pub fn foo() -> impl core::future::F┃uture<Output = usize> {
+    async { 0 }
+}
+```
+
+#### After
+```rust
+pub async fn foo() -> usize {
+    async { 0 }
+}
+```
+
+
+### `toggle_ignore`
+**Source:**  [toggle_ignore.rs](crates/ide-assists/src/handlers/toggle_ignore.rs#8) 
+
+Adds `#[ignore]` attribute to the test.
+
+#### Before
+```rust
+┃#[test]
+fn arithmetics {
+    assert_eq!(2 + 2, 5);
+}
+```
+
+#### After
+```rust
+#[test]
+#[ignore]
+fn arithmetics {
+    assert_eq!(2 + 2, 5);
+}
+```
+
+
+### `toggle_macro_delimiter`
+**Source:**  [toggle_macro_delimiter.rs](crates/ide-assists/src/handlers/toggle_macro_delimiter.rs#9) 
+
+Change macro delimiters in the order of `( -> { -> [ -> (`.
+
+#### Before
+```rust
+macro_rules! sth {
+    () => {};
+}
+
+sth!┃( );
+```
+
+#### After
+```rust
+macro_rules! sth {
+    () => {};
+}
+
+sth!{ }
+```
+
+
+### `unmerge_match_arm`
+**Source:**  [unmerge_match_arm.rs](crates/ide-assists/src/handlers/unmerge_match_arm.rs#10) 
+
+Splits the current match with a `|` pattern into two arms with identical bodies.
+
+#### Before
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move(..) ┃| Action::Stop => foo(),
+    }
+}
+```
+
+#### After
+```rust
+enum Action { Move { distance: u32 }, Stop }
+
+fn handle(action: Action) {
+    match action {
+        Action::Move(..) => foo(),
+        Action::Stop => foo(),
+    }
+}
+```
+
+
+### `unmerge_use`
+**Source:**  [unmerge_use.rs](crates/ide-assists/src/handlers/unmerge_use.rs#12) 
+
+Extracts single use item from use list.
+
+#### Before
+```rust
+use std::fmt::{Debug, Display┃};
+```
+
+#### After
+```rust
+use std::fmt::{Debug};
+use std::fmt::Display;
+```
+
+
+### `unnecessary_async`
+**Source:**  [unnecessary_async.rs](crates/ide-assists/src/handlers/unnecessary_async.rs#17) 
+
+Removes the `async` mark from functions which have no `.await` in their body.
+Looks for calls to the functions and removes the `.await` on the call site.
+
+#### Before
+```rust
+pub asy┃nc fn foo() {}
+pub async fn bar() { foo().await }
+```
+
+#### After
+```rust
+pub fn foo() {}
+pub async fn bar() { foo() }
+```
+
+
+### `unqualify_method_call`
+**Source:**  [unqualify_method_call.rs](crates/ide-assists/src/handlers/unqualify_method_call.rs#9) 
+
+Transforms universal function call syntax into a method call.
+
+#### Before
+```rust
+fn main() {
+    std::ops::Add::add┃(1, 2);
+}
+```
+
+#### After
+```rust
+use std::ops::Add;
+
+fn main() {
+    1.add(2);
+}
+```
+
+
+### `unwrap_block`
+**Source:**  [unwrap_block.rs](crates/ide-assists/src/handlers/unwrap_block.rs#12) 
+
+This assist removes if...else, for, while and loop control statements to just keep the body.
+
+#### Before
+```rust
+fn foo() {
+    if true {┃
+        println!("foo");
+    }
+}
+```
+
+#### After
+```rust
+fn foo() {
+    println!("foo");
+}
+```
+
+
+### `unwrap_option_return_type`
+**Source:**  [unwrap_return_type.rs](crates/ide-assists/src/handlers/unwrap_return_type.rs#13) 
+
+Unwrap the function's return type.
+
+#### Before
+```rust
+fn foo() -> Option<i32>┃ { Some(42i32) }
+```
+
+#### After
+```rust
+fn foo() -> i32 { 42i32 }
+```
+
+
+### `unwrap_result_return_type`
+**Source:**  [unwrap_return_type.rs](crates/ide-assists/src/handlers/unwrap_return_type.rs#26) 
+
+Unwrap the function's return type.
+
+#### Before
+```rust
+fn foo() -> Result<i32>┃ { Ok(42i32) }
+```
+
+#### After
+```rust
+fn foo() -> i32 { 42i32 }
+```
+
+
+### `unwrap_tuple`
+**Source:**  [unwrap_tuple.rs](crates/ide-assists/src/handlers/unwrap_tuple.rs#8) 
+
+Unwrap the tuple to different variables.
+
+#### Before
+```rust
+fn main() {
+    ┃let (foo, bar) = ("Foo", "Bar");
+}
+```
+
+#### After
+```rust
+fn main() {
+    let foo = "Foo";
+    let bar = "Bar";
+}
+```
+
+
+### `wrap_return_type_in_option`
+**Source:**  [wrap_return_type.rs](crates/ide-assists/src/handlers/wrap_return_type.rs#16) 
+
+Wrap the function's return type into Option.
+
+#### Before
+```rust
+fn foo() -> i32┃ { 42i32 }
+```
+
+#### After
+```rust
+fn foo() -> Option<i32> { Some(42i32) }
+```
+
+
+### `wrap_return_type_in_result`
+**Source:**  [wrap_return_type.rs](crates/ide-assists/src/handlers/wrap_return_type.rs#29) 
+
+Wrap the function's return type into Result.
+
+#### Before
+```rust
+fn foo() -> i32┃ { 42i32 }
+```
+
+#### After
+```rust
+fn foo() -> Result<i32, ${0:_}> { Ok(42i32) }
+```
+
+
+### `wrap_unwrap_cfg_attr`
+**Source:**  [wrap_unwrap_cfg_attr.rs](crates/ide-assists/src/handlers/wrap_unwrap_cfg_attr.rs#12) 
+
+Wraps an attribute to a cfg_attr attribute or unwraps a cfg_attr attribute to the inner attributes.
+
+#### Before
+```rust
+#[derive┃(Debug)]
+struct S {
+   field: i32
+}
+```
+
+#### After
+```rust
+#[cfg_attr(┃, derive(Debug))]
+struct S {
+   field: i32
+}
+```
diff --git a/src/tools/rust-analyzer/docs/book/src/configuration_generated.md b/src/tools/rust-analyzer/docs/book/src/configuration_generated.md
index 55678926609c4..0c6674b1408e9 100644
--- a/src/tools/rust-analyzer/docs/book/src/configuration_generated.md
+++ b/src/tools/rust-analyzer/docs/book/src/configuration_generated.md
@@ -470,9 +470,9 @@ The warnings will be indicated by a blue squiggly underline in code
 and a blue icon in the `Problems Panel`.
 
 
-**rust-analyzer.files.excludeDirs** (default: [])
+**rust-analyzer.files.exclude** (default: [])
 
- These directories will be ignored by rust-analyzer. They are
+ These paths (file/directories) will be ignored by rust-analyzer. They are
 relative to the workspace root, and globs are not supported. You may
 also need to add the folders to Code's `files.watcherExclude`.
 
diff --git a/src/tools/rust-analyzer/docs/book/src/diagnostics_generated.md b/src/tools/rust-analyzer/docs/book/src/diagnostics_generated.md
new file mode 100644
index 0000000000000..d34c459ad0258
--- /dev/null
+++ b/src/tools/rust-analyzer/docs/book/src/diagnostics_generated.md
@@ -0,0 +1,516 @@
+//! Generated by `cargo xtask codegen diagnostics-docs`, do not edit by hand.
+
+#### attribute-expansion-disabled
+
+Source:  [macro_error.rs](crates/ide-diagnostics/src/handlers/macro_error.rs#7) 
+
+
+This diagnostic is shown for attribute proc macros when attribute expansions have been disabled.
+
+
+
+
+#### await-outside-of-async
+
+Source:  [await_outside_of_async.rs](crates/ide-diagnostics/src/handlers/await_outside_of_async.rs#3) 
+
+
+This diagnostic is triggered if the `await` keyword is used outside of an async function or block
+
+
+
+
+#### break-outside-of-loop
+
+Source:  [break_outside_of_loop.rs](crates/ide-diagnostics/src/handlers/break_outside_of_loop.rs#3) 
+
+
+This diagnostic is triggered if the `break` keyword is used outside of a loop.
+
+
+
+
+#### cast-to-unsized
+
+Source:  [invalid_cast.rs](crates/ide-diagnostics/src/handlers/invalid_cast.rs#106) 
+
+
+This diagnostic is triggered when casting to an unsized type
+
+
+
+
+#### expected-function
+
+Source:  [expected_function.rs](crates/ide-diagnostics/src/handlers/expected_function.rs#5) 
+
+
+This diagnostic is triggered if a call is made on something that is not callable.
+
+
+
+
+#### generic-args-prohibited
+
+Source:  [generic_args_prohibited.rs](crates/ide-diagnostics/src/handlers/generic_args_prohibited.rs#10) 
+
+
+This diagnostic is shown when generic arguments are provided for a type that does not accept
+generic arguments.
+
+
+
+
+#### inactive-code
+
+Source:  [inactive_code.rs](crates/ide-diagnostics/src/handlers/inactive_code.rs#6) 
+
+
+This diagnostic is shown for code with inactive `#[cfg]` attributes.
+
+
+
+
+#### incoherent-impl
+
+Source:  [incoherent_impl.rs](crates/ide-diagnostics/src/handlers/incoherent_impl.rs#6) 
+
+
+This diagnostic is triggered if the targe type of an impl is from a foreign crate.
+
+
+
+
+#### incorrect-ident-case
+
+Source:  [incorrect_case.rs](crates/ide-diagnostics/src/handlers/incorrect_case.rs#13) 
+
+
+This diagnostic is triggered if an item name doesn't follow [Rust naming convention](https://doc.rust-lang.org/1.0.0/style/style/naming/README.html).
+
+
+
+
+#### invalid-cast
+
+Source:  [invalid_cast.rs](crates/ide-diagnostics/src/handlers/invalid_cast.rs#18) 
+
+
+This diagnostic is triggered if the code contains an illegal cast
+
+
+
+
+#### invalid-derive-target
+
+Source:  [invalid_derive_target.rs](crates/ide-diagnostics/src/handlers/invalid_derive_target.rs#3) 
+
+
+This diagnostic is shown when the derive attribute is used on an item other than a `struct`,
+`enum` or `union`.
+
+
+
+
+#### macro-def-error
+
+Source:  [macro_error.rs](crates/ide-diagnostics/src/handlers/macro_error.rs#24) 
+
+
+This diagnostic is shown for macro expansion errors.
+
+
+
+
+#### macro-error
+
+Source:  [macro_error.rs](crates/ide-diagnostics/src/handlers/macro_error.rs#3) 
+
+
+This diagnostic is shown for macro expansion errors.
+
+
+
+
+#### malformed-derive
+
+Source:  [malformed_derive.rs](crates/ide-diagnostics/src/handlers/malformed_derive.rs#3) 
+
+
+This diagnostic is shown when the derive attribute has invalid input.
+
+
+
+
+#### mismatched-arg-count
+
+Source:  [mismatched_arg_count.rs](crates/ide-diagnostics/src/handlers/mismatched_arg_count.rs#31) 
+
+
+This diagnostic is triggered if a function is invoked with an incorrect amount of arguments.
+
+
+
+
+#### mismatched-tuple-struct-pat-arg-count
+
+Source:  [mismatched_arg_count.rs](crates/ide-diagnostics/src/handlers/mismatched_arg_count.rs#11) 
+
+
+This diagnostic is triggered if a function is invoked with an incorrect amount of arguments.
+
+
+
+
+#### missing-fields
+
+Source:  [missing_fields.rs](crates/ide-diagnostics/src/handlers/missing_fields.rs#19) 
+
+
+This diagnostic is triggered if record lacks some fields that exist in the corresponding structure.
+
+Example:
+
+```rust
+struct A { a: u8, b: u8 }
+
+let a = A { a: 10 };
+```
+
+
+
+
+#### missing-match-arm
+
+Source:  [missing_match_arms.rs](crates/ide-diagnostics/src/handlers/missing_match_arms.rs#3) 
+
+
+This diagnostic is triggered if `match` block is missing one or more match arms.
+
+
+
+
+#### missing-unsafe
+
+Source:  [missing_unsafe.rs](crates/ide-diagnostics/src/handlers/missing_unsafe.rs#10) 
+
+
+This diagnostic is triggered if an operation marked as `unsafe` is used outside of an `unsafe` function or block.
+
+
+
+
+#### moved-out-of-ref
+
+Source:  [moved_out_of_ref.rs](crates/ide-diagnostics/src/handlers/moved_out_of_ref.rs#4) 
+
+
+This diagnostic is triggered on moving non copy things out of references.
+
+
+
+
+#### need-mut
+
+Source:  [mutability_errors.rs](crates/ide-diagnostics/src/handlers/mutability_errors.rs#8) 
+
+
+This diagnostic is triggered on mutating an immutable variable.
+
+
+
+
+#### no-such-field
+
+Source:  [no_such_field.rs](crates/ide-diagnostics/src/handlers/no_such_field.rs#12) 
+
+
+This diagnostic is triggered if created structure does not have field provided in record.
+
+
+
+
+#### non-exhaustive-let
+
+Source:  [non_exhaustive_let.rs](crates/ide-diagnostics/src/handlers/non_exhaustive_let.rs#3) 
+
+
+This diagnostic is triggered if a `let` statement without an `else` branch has a non-exhaustive
+pattern.
+
+
+
+
+#### private-assoc-item
+
+Source:  [private_assoc_item.rs](crates/ide-diagnostics/src/handlers/private_assoc_item.rs#3) 
+
+
+This diagnostic is triggered if the referenced associated item is not visible from the current
+module.
+
+
+
+
+#### private-field
+
+Source:  [private_field.rs](crates/ide-diagnostics/src/handlers/private_field.rs#3) 
+
+
+This diagnostic is triggered if the accessed field is not visible from the current module.
+
+
+
+
+#### proc-macro-disabled
+
+Source:  [macro_error.rs](crates/ide-diagnostics/src/handlers/macro_error.rs#11) 
+
+
+This diagnostic is shown for proc macros that have been specifically disabled via `rust-analyzer.procMacro.ignored`.
+
+
+
+
+#### remove-trailing-return
+
+Source:  [remove_trailing_return.rs](crates/ide-diagnostics/src/handlers/remove_trailing_return.rs#8) 
+
+
+This diagnostic is triggered when there is a redundant `return` at the end of a function
+or closure.
+
+
+
+
+#### remove-unnecessary-else
+
+Source:  [remove_unnecessary_else.rs](crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs#17) 
+
+
+This diagnostic is triggered when there is an `else` block for an `if` expression whose
+then branch diverges (e.g. ends with a `return`, `continue`, `break` e.t.c).
+
+
+
+
+#### replace-filter-map-next-with-find-map
+
+Source:  [replace_filter_map_next_with_find_map.rs](crates/ide-diagnostics/src/handlers/replace_filter_map_next_with_find_map.rs#11) 
+
+
+This diagnostic is triggered when `.filter_map(..).next()` is used, rather than the more concise `.find_map(..)`.
+
+
+
+
+#### trait-impl-incorrect-safety
+
+Source:  [trait_impl_incorrect_safety.rs](crates/ide-diagnostics/src/handlers/trait_impl_incorrect_safety.rs#6) 
+
+
+Diagnoses incorrect safety annotations of trait impls.
+
+
+
+
+#### trait-impl-missing-assoc_item
+
+Source:  [trait_impl_missing_assoc_item.rs](crates/ide-diagnostics/src/handlers/trait_impl_missing_assoc_item.rs#7) 
+
+
+Diagnoses missing trait items in a trait impl.
+
+
+
+
+#### trait-impl-orphan
+
+Source:  [trait_impl_orphan.rs](crates/ide-diagnostics/src/handlers/trait_impl_orphan.rs#5) 
+
+
+Only traits defined in the current crate can be implemented for arbitrary types
+
+
+
+
+#### trait-impl-redundant-assoc_item
+
+Source:  [trait_impl_redundant_assoc_item.rs](crates/ide-diagnostics/src/handlers/trait_impl_redundant_assoc_item.rs#12) 
+
+
+Diagnoses redundant trait items in a trait impl.
+
+
+
+
+#### type-mismatch
+
+Source:  [type_mismatch.rs](crates/ide-diagnostics/src/handlers/type_mismatch.rs#20) 
+
+
+This diagnostic is triggered when the type of an expression or pattern does not match
+the expected type.
+
+
+
+
+#### typed-hole
+
+Source:  [typed_hole.rs](crates/ide-diagnostics/src/handlers/typed_hole.rs#18) 
+
+
+This diagnostic is triggered when an underscore expression is used in an invalid position.
+
+
+
+
+#### undeclared-label
+
+Source:  [undeclared_label.rs](crates/ide-diagnostics/src/handlers/undeclared_label.rs#3) 
+
+
+
+
+
+
+#### unimplemented-builtin-macro
+
+Source:  [unimplemented_builtin_macro.rs](crates/ide-diagnostics/src/handlers/unimplemented_builtin_macro.rs#3) 
+
+
+This diagnostic is shown for builtin macros which are not yet implemented by rust-analyzer
+
+
+
+
+#### unlinked-file
+
+Source:  [unlinked_file.rs](crates/ide-diagnostics/src/handlers/unlinked_file.rs#20) 
+
+
+This diagnostic is shown for files that are not included in any crate, or files that are part of
+crates rust-analyzer failed to discover. The file will not have IDE features available.
+
+
+
+
+#### unnecessary-braces
+
+Source:  [useless_braces.rs](crates/ide-diagnostics/src/handlers/useless_braces.rs#9) 
+
+
+Diagnostic for unnecessary braces in `use` items.
+
+
+
+
+#### unreachable-label
+
+Source:  [unreachable_label.rs](crates/ide-diagnostics/src/handlers/unreachable_label.rs#3) 
+
+
+
+
+
+
+#### unresolved-assoc-item
+
+Source:  [unresolved_assoc_item.rs](crates/ide-diagnostics/src/handlers/unresolved_assoc_item.rs#3) 
+
+
+This diagnostic is triggered if the referenced associated item does not exist.
+
+
+
+
+#### unresolved-extern-crate
+
+Source:  [unresolved_extern_crate.rs](crates/ide-diagnostics/src/handlers/unresolved_extern_crate.rs#3) 
+
+
+This diagnostic is triggered if rust-analyzer is unable to discover referred extern crate.
+
+
+
+
+#### unresolved-field
+
+Source:  [unresolved_field.rs](crates/ide-diagnostics/src/handlers/unresolved_field.rs#23) 
+
+
+This diagnostic is triggered if a field does not exist on a given type.
+
+
+
+
+#### unresolved-ident
+
+Source:  [unresolved_ident.rs](crates/ide-diagnostics/src/handlers/unresolved_ident.rs#3) 
+
+
+This diagnostic is triggered if an expr-position ident is invalid.
+
+
+
+
+#### unresolved-import
+
+Source:  [unresolved_import.rs](crates/ide-diagnostics/src/handlers/unresolved_import.rs#3) 
+
+
+This diagnostic is triggered if rust-analyzer is unable to resolve a path in
+a `use` declaration.
+
+
+
+
+#### unresolved-macro-call
+
+Source:  [unresolved_macro_call.rs](crates/ide-diagnostics/src/handlers/unresolved_macro_call.rs#3) 
+
+
+This diagnostic is triggered if rust-analyzer is unable to resolve the path
+to a macro in a macro invocation.
+
+
+
+
+#### unresolved-method
+
+Source:  [unresolved_method.rs](crates/ide-diagnostics/src/handlers/unresolved_method.rs#15) 
+
+
+This diagnostic is triggered if a method does not exist on a given type.
+
+
+
+
+#### unresolved-module
+
+Source:  [unresolved_module.rs](crates/ide-diagnostics/src/handlers/unresolved_module.rs#8) 
+
+
+This diagnostic is triggered if rust-analyzer is unable to discover referred module.
+
+
+
+
+#### unused-mut
+
+Source:  [mutability_errors.rs](crates/ide-diagnostics/src/handlers/mutability_errors.rs#62) 
+
+
+This diagnostic is triggered when a mutable variable isn't actually mutated.
+
+
+
+
+#### unused-variables
+
+Source:  [unused_variables.rs](crates/ide-diagnostics/src/handlers/unused_variables.rs#13) 
+
+
+This diagnostic is triggered when a local variable is not used.
+
+
diff --git a/src/tools/rust-analyzer/docs/book/src/features_generated.md b/src/tools/rust-analyzer/docs/book/src/features_generated.md
new file mode 100644
index 0000000000000..2c5829b1f54c0
--- /dev/null
+++ b/src/tools/rust-analyzer/docs/book/src/features_generated.md
@@ -0,0 +1,940 @@
+//! Generated by `cargo xtask codegen feature-docs`, do not edit by hand.
+
+### Annotations
+**Source:**  [annotations.rs](crates/ide/src/annotations.rs#19) 
+
+Provides user with annotations above items for looking up references or impl blocks
+and running/debugging binaries.
+
+![Annotations](https://user-images.githubusercontent.com/48062697/113020672-b7c34f00-917a-11eb-8f6e-858735660a0e.png)
+
+
+### Auto Import
+**Source:**  [auto_import.rs](crates/ide-assists/src/handlers/auto_import.rs#15) 
+
+Using the `auto-import` assist it is possible to insert missing imports for unresolved items.
+When inserting an import it will do so in a structured manner by keeping imports grouped,
+separated by a newline in the following order:
+
+- `std` and `core`
+- External Crates
+- Current Crate, paths prefixed by `crate`
+- Current Module, paths prefixed by `self`
+- Super Module, paths prefixed by `super`
+
+Example:
+```rust
+use std::fs::File;
+
+use itertools::Itertools;
+use syntax::ast;
+
+use crate::utils::insert_use;
+
+use self::auto_import;
+
+use super::AssistContext;
+```
+
+#### Import Granularity
+
+It is possible to configure how use-trees are merged with the `imports.granularity.group` setting.
+It has the following configurations:
+
+- `crate`: Merge imports from the same crate into a single use statement. This kind of
+ nesting is only supported in Rust versions later than 1.24.
+- `module`: Merge imports from the same module into a single use statement.
+- `item`: Don't merge imports at all, creating one import per item.
+- `preserve`: Do not change the granularity of any imports. For auto-import this has the same
+ effect as `item`.
+- `one`: Merge all imports into a single use statement as long as they have the same visibility
+ and attributes.
+
+In `VS Code` the configuration for this is `rust-analyzer.imports.granularity.group`.
+
+#### Import Prefix
+
+The style of imports in the same crate is configurable through the `imports.prefix` setting.
+It has the following configurations:
+
+- `crate`: This setting will force paths to be always absolute, starting with the `crate`
+ prefix, unless the item is defined outside of the current crate.
+- `self`: This setting will force paths that are relative to the current module to always
+ start with `self`. This will result in paths that always start with either `crate`, `self`,
+ `super` or an extern crate identifier.
+- `plain`: This setting does not impose any restrictions in imports.
+
+In `VS Code` the configuration for this is `rust-analyzer.imports.prefix`.
+
+![Auto Import](https://user-images.githubusercontent.com/48062697/113020673-b85be580-917a-11eb-9022-59585f35d4f8.gif)
+
+
+### Completion With Autoimport
+**Source:**  [flyimport.rs](crates/ide-completion/src/completions/flyimport.rs#20) 
+
+When completing names in the current scope, proposes additional imports from other modules or crates,
+if they can be qualified in the scope, and their name contains all symbols from the completion input.
+
+To be considered applicable, the name must contain all input symbols in the given order, not necessarily adjacent.
+If any input symbol is not lowercased, the name must contain all symbols in exact case; otherwise the containing is checked case-insensitively.
+
+```
+fn main() {
+    pda$0
+}
+# pub mod std { pub mod marker { pub struct PhantomData { } } }
+```
+->
+```
+use std::marker::PhantomData;
+
+fn main() {
+    PhantomData
+}
+# pub mod std { pub mod marker { pub struct PhantomData { } } }
+```
+
+Also completes associated items, that require trait imports.
+If any unresolved and/or partially-qualified path precedes the input, it will be taken into account.
+Currently, only the imports with their import path ending with the whole qualifier will be proposed
+(no fuzzy matching for qualifier).
+
+```
+mod foo {
+    pub mod bar {
+        pub struct Item;
+
+        impl Item {
+            pub const TEST_ASSOC: usize = 3;
+        }
+    }
+}
+
+fn main() {
+    bar::Item::TEST_A$0
+}
+```
+->
+```
+use foo::bar;
+
+mod foo {
+    pub mod bar {
+        pub struct Item;
+
+        impl Item {
+            pub const TEST_ASSOC: usize = 3;
+        }
+    }
+}
+
+fn main() {
+    bar::Item::TEST_ASSOC
+}
+```
+
+NOTE: currently, if an assoc item comes from a trait that's not currently imported, and it also has an unresolved and/or partially-qualified path,
+no imports will be proposed.
+
+#### Fuzzy search details
+
+To avoid an excessive amount of the results returned, completion input is checked for inclusion in the names only
+(i.e. in `HashMap` in the `std::collections::HashMap` path).
+For the same reasons, avoids searching for any path imports for inputs with their length less than 2 symbols
+(but shows all associated items for any input length).
+
+#### Import configuration
+
+It is possible to configure how use-trees are merged with the `imports.granularity.group` setting.
+Mimics the corresponding behavior of the `Auto Import` feature.
+
+#### LSP and performance implications
+
+The feature is enabled only if the LSP client supports LSP protocol version 3.16+ and reports the `additionalTextEdits`
+(case-sensitive) resolve client capability in its client capabilities.
+This way the server is able to defer the costly computations, doing them for a selected completion item only.
+For clients with no such support, all edits have to be calculated on the completion request, including the fuzzy search completion ones,
+which might be slow ergo the feature is automatically disabled.
+
+#### Feature toggle
+
+The feature can be forcefully turned off in the settings with the `rust-analyzer.completion.autoimport.enable` flag.
+Note that having this flag set to `true` does not guarantee that the feature is enabled: your client needs to have the corresponding
+capability enabled.
+
+
+### Debug ItemTree
+**Source:**  [view_item_tree.rs](crates/ide/src/view_item_tree.rs#5) 
+
+Displays the ItemTree of the currently open file, for debugging.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Debug ItemTree** |
+
+
+### Expand Macro Recursively
+**Source:**  [expand_macro.rs](crates/ide/src/expand_macro.rs#18) 
+
+Shows the full macro expansion of the macro at the current caret position.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Expand macro recursively at caret** |
+
+![Expand Macro Recursively](https://user-images.githubusercontent.com/48062697/113020648-b3973180-917a-11eb-84a9-ecb921293dc5.gif)
+
+
+### Expand and Shrink Selection
+**Source:**  [extend_selection.rs](crates/ide/src/extend_selection.rs#15) 
+
+Extends or shrinks the current selection to the encompassing syntactic construct
+(expression, statement, item, module, etc). It works with multiple cursors.
+
+| Editor  | Shortcut |
+|---------|----------|
+| VS Code | <kbd>Alt+Shift+→</kbd>, <kbd>Alt+Shift+←</kbd> |
+
+![Expand and Shrink Selection](https://user-images.githubusercontent.com/48062697/113020651-b42fc800-917a-11eb-8a4f-cf1a07859fac.gif)
+
+
+### File Structure
+**Source:**  [file_structure.rs](crates/ide/src/file_structure.rs#26) 
+
+Provides a tree of the symbols defined in the file. Can be used to
+
+* fuzzy search symbol in a file (super useful)
+* draw breadcrumbs to describe the context around the cursor
+* draw outline of the file
+
+| Editor  | Shortcut |
+|---------|----------|
+| VS Code | <kbd>Ctrl+Shift+O</kbd> |
+
+![File Structure](https://user-images.githubusercontent.com/48062697/113020654-b42fc800-917a-11eb-8388-e7dc4d92b02e.gif)
+
+
+### Find All References
+**Source:**  [references.rs](crates/ide/src/references.rs#42) 
+
+Shows all references of the item at the cursor location
+
+| Editor  | Shortcut |
+|---------|----------|
+| VS Code | <kbd>Shift+Alt+F12</kbd> |
+
+![Find All References](https://user-images.githubusercontent.com/48062697/113020670-b7c34f00-917a-11eb-8003-370ac5f2b3cb.gif)
+
+
+### Folding
+**Source:**  [folding_ranges.rs](crates/ide/src/folding_ranges.rs#36) 
+
+Defines folding regions for curly braced blocks, runs of consecutive use, mod, const or static
+items, and `region` / `endregion` comment markers.
+
+
+### Format String Completion
+**Source:**  [format_like.rs](crates/ide-completion/src/completions/postfix/format_like.rs#0) 
+
+`"Result {result} is {2 + 2}"` is expanded to the `"Result {} is {}", result, 2 + 2`.
+
+The following postfix snippets are available:
+
+* `format` -> `format!(...)`
+* `panic` -> `panic!(...)`
+* `println` -> `println!(...)`
+* `log`:
+** `logd` -> `log::debug!(...)`
+** `logt` -> `log::trace!(...)`
+** `logi` -> `log::info!(...)`
+** `logw` -> `log::warn!(...)`
+** `loge` -> `log::error!(...)`
+
+![Format String Completion](https://user-images.githubusercontent.com/48062697/113020656-b560f500-917a-11eb-87de-02991f61beb8.gif)
+
+
+### Go to Declaration
+**Source:**  [goto_declaration.rs](crates/ide/src/goto_declaration.rs#13) 
+
+Navigates to the declaration of an identifier.
+
+This is the same as `Go to Definition` with the following exceptions:
+- outline modules will navigate to the `mod name;` item declaration
+- trait assoc items will navigate to the assoc item of the trait declaration as opposed to the trait impl
+- fields in patterns will navigate to the field declaration of the struct, union or variant
+
+
+### Go to Definition
+**Source:**  [goto_definition.rs](crates/ide/src/goto_definition.rs#28) 
+
+Navigates to the definition of an identifier.
+
+For outline modules, this will navigate to the source file of the module.
+
+| Editor  | Shortcut |
+|---------|----------|
+| VS Code | <kbd>F12</kbd> |
+
+![Go to Definition](https://user-images.githubusercontent.com/48062697/113065563-025fbe00-91b1-11eb-83e4-a5a703610b23.gif)
+
+
+### Go to Implementation
+**Source:**  [goto_implementation.rs](crates/ide/src/goto_implementation.rs#11) 
+
+Navigates to the impl items of types.
+
+| Editor  | Shortcut |
+|---------|----------|
+| VS Code | <kbd>Ctrl+F12</kbd>
+
+![Go to Implementation](https://user-images.githubusercontent.com/48062697/113065566-02f85480-91b1-11eb-9288-aaad8abd8841.gif)
+
+
+### Go to Type Definition
+**Source:**  [goto_type_definition.rs](crates/ide/src/goto_type_definition.rs#7) 
+
+Navigates to the type of an identifier.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **Go to Type Definition** |
+
+![Go to Type Definition](https://user-images.githubusercontent.com/48062697/113020657-b560f500-917a-11eb-9007-0f809733a338.gif)
+
+
+### Highlight Related
+**Source:**  [highlight_related.rs](crates/ide/src/highlight_related.rs#42) 
+
+Highlights constructs related to the thing under the cursor:
+
+1. if on an identifier, highlights all references to that identifier in the current file
+     * additionally, if the identifier is a trait in a where clause, type parameter trait bound or use item, highlights all references to that trait's assoc items in the corresponding scope
+1. if on an `async` or `await` token, highlights all yield points for that async context
+1. if on a `return` or `fn` keyword, `?` character or `->` return type arrow, highlights all exit points for that context
+1. if on a `break`, `loop`, `while` or `for` token, highlights all break points for that loop or block context
+1. if on a `move` or `|` token that belongs to a closure, highlights all captures of the closure.
+
+Note: `?`, `|` and `->` do not currently trigger this behavior in the VSCode editor.
+
+
+### Hover
+**Source:**  [hover.rs](crates/ide/src/hover.rs#116) 
+
+Shows additional information, like the type of an expression or the documentation for a definition when "focusing" code.
+Focusing is usually hovering with a mouse, but can also be triggered with a shortcut.
+
+![Hover](https://user-images.githubusercontent.com/48062697/113020658-b5f98b80-917a-11eb-9f88-3dbc27320c95.gif)
+
+
+### Inlay Hints
+**Source:**  [inlay_hints.rs](crates/ide/src/inlay_hints.rs#41) 
+
+rust-analyzer shows additional information inline with the source code.
+Editors usually render this using read-only virtual text snippets interspersed with code.
+
+rust-analyzer by default shows hints for
+
+* types of local variables
+* names of function arguments
+* names of const generic parameters
+* types of chained expressions
+
+Optionally, one can enable additional hints for
+
+* return types of closure expressions
+* elided lifetimes
+* compiler inserted reborrows
+* names of generic type and lifetime parameters
+
+Note: inlay hints for function argument names are heuristically omitted to reduce noise and will not appear if
+any of the
+[following criteria](https://github.com/rust-lang/rust-analyzer/blob/6b8b8ff4c56118ddee6c531cde06add1aad4a6af/crates/ide/src/inlay_hints/param_name.rs#L92-L99)
+are met:
+
+* the parameter name is a suffix of the function's name
+* the argument is a qualified constructing or call expression where the qualifier is an ADT
+* exact argument<->parameter match(ignoring leading underscore) or parameter is a prefix/suffix
+  of argument with _ splitting it off
+* the parameter name starts with `ra_fixture`
+* the parameter name is a
+[well known name](https://github.com/rust-lang/rust-analyzer/blob/6b8b8ff4c56118ddee6c531cde06add1aad4a6af/crates/ide/src/inlay_hints/param_name.rs#L200)
+in a unary function
+* the parameter name is a
+[single character](https://github.com/rust-lang/rust-analyzer/blob/6b8b8ff4c56118ddee6c531cde06add1aad4a6af/crates/ide/src/inlay_hints/param_name.rs#L201)
+in a unary function
+
+![Inlay hints](https://user-images.githubusercontent.com/48062697/113020660-b5f98b80-917a-11eb-8d70-3be3fd558cdd.png)
+
+
+### Interpret A Function, Static Or Const.
+**Source:**  [interpret.rs](crates/ide/src/interpret.rs#8) 
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Interpret** |
+
+
+### Join Lines
+**Source:**  [join_lines.rs](crates/ide/src/join_lines.rs#20) 
+
+Join selected lines into one, smartly fixing up whitespace, trailing commas, and braces.
+
+See [this gif](https://user-images.githubusercontent.com/1711539/124515923-4504e800-dde9-11eb-8d58-d97945a1a785.gif) for the cases handled specially by joined lines.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Join lines** |
+
+![Join Lines](https://user-images.githubusercontent.com/48062697/113020661-b6922200-917a-11eb-87c4-b75acc028f11.gif)
+
+
+### Magic Completions
+**Source:**  [lib.rs](crates/ide-completion/src/lib.rs#78) 
+
+In addition to usual reference completion, rust-analyzer provides some ✨magic✨
+completions as well:
+
+Keywords like `if`, `else` `while`, `loop` are completed with braces, and cursor
+is placed at the appropriate position. Even though `if` is easy to type, you
+still want to complete it, to get ` { }` for free! `return` is inserted with a
+space or `;` depending on the return type of the function.
+
+When completing a function call, `()` are automatically inserted. If a function
+takes arguments, the cursor is positioned inside the parenthesis.
+
+There are postfix completions, which can be triggered by typing something like
+`foo().if`. The word after `.` determines postfix completion. Possible variants are:
+
+- `expr.if` -> `if expr {}` or `if let ... {}` for `Option` or `Result`
+- `expr.match` -> `match expr {}`
+- `expr.while` -> `while expr {}` or `while let ... {}` for `Option` or `Result`
+- `expr.ref` -> `&expr`
+- `expr.refm` -> `&mut expr`
+- `expr.let` -> `let $0 = expr;`
+- `expr.lete` -> `let $1 = expr else { $0 };`
+- `expr.letm` -> `let mut $0 = expr;`
+- `expr.not` -> `!expr`
+- `expr.dbg` -> `dbg!(expr)`
+- `expr.dbgr` -> `dbg!(&expr)`
+- `expr.call` -> `(expr)`
+
+There also snippet completions:
+
+#### Expressions
+
+- `pd` -> `eprintln!(" = {:?}", );`
+- `ppd` -> `eprintln!(" = {:#?}", );`
+
+#### Items
+
+- `tfn` -> `#[test] fn feature(){}`
+- `tmod` ->
+```rust
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_name() {}
+}
+```
+
+And the auto import completions, enabled with the `rust-analyzer.completion.autoimport.enable` setting and the corresponding LSP client capabilities.
+Those are the additional completion options with automatic `use` import and options from all project importable items,
+fuzzy matched against the completion input.
+
+![Magic Completions](https://user-images.githubusercontent.com/48062697/113020667-b72ab880-917a-11eb-8778-716cf26a0eb3.gif)
+
+
+### Matching Brace
+**Source:**  [matching_brace.rs](crates/ide/src/matching_brace.rs#6) 
+
+If the cursor is on any brace (`<>(){}[]||`) which is a part of a brace-pair,
+moves cursor to the matching brace. It uses the actual parser to determine
+braces, so it won't confuse generics with comparisons.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Find matching brace** |
+
+![Matching Brace](https://user-images.githubusercontent.com/48062697/113065573-04298180-91b1-11eb-8dec-d4e2a202f304.gif)
+
+
+### Memory Usage
+**Source:**  [apply_change.rs](crates/ide-db/src/apply_change.rs#43) 
+
+Clears rust-analyzer's internal database and prints memory usage statistics.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Memory Usage (Clears Database)**
+
+
+### Move Item
+**Source:**  [move_item.rs](crates/ide/src/move_item.rs#16) 
+
+Move item under cursor or selection up and down.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Move item up**
+| VS Code | **rust-analyzer: Move item down**
+
+![Move Item](https://user-images.githubusercontent.com/48062697/113065576-04298180-91b1-11eb-91ce-4505e99ed598.gif)
+
+
+### On Enter
+**Source:**  [on_enter.rs](crates/ide/src/typing/on_enter.rs#17) 
+
+rust-analyzer can override <kbd>Enter</kbd> key to make it smarter:
+
+- <kbd>Enter</kbd> inside triple-slash comments automatically inserts `///`
+- <kbd>Enter</kbd> in the middle or after a trailing space in `//` inserts `//`
+- <kbd>Enter</kbd> inside `//!` doc comments automatically inserts `//!`
+- <kbd>Enter</kbd> after `{` indents contents and closing `}` of single-line block
+
+This action needs to be assigned to shortcut explicitly.
+
+Note that, depending on the other installed extensions, this feature can visibly slow down typing.
+Similarly, if rust-analyzer crashes or stops responding, `Enter` might not work.
+In that case, you can still press `Shift-Enter` to insert a newline.
+
+#### VS Code
+
+Add the following to `keybindings.json`:
+```json
+{
+  "key": "Enter",
+  "command": "rust-analyzer.onEnter",
+  "when": "editorTextFocus && !suggestWidgetVisible && editorLangId == rust"
+}
+````
+
+When using the Vim plugin:
+```json
+{
+  "key": "Enter",
+  "command": "rust-analyzer.onEnter",
+  "when": "editorTextFocus && !suggestWidgetVisible && editorLangId == rust && vim.mode == 'Insert'"
+}
+````
+
+![On Enter](https://user-images.githubusercontent.com/48062697/113065578-04c21800-91b1-11eb-82b8-22b8c481e645.gif)
+
+
+### On Typing Assists
+**Source:**  [typing.rs](crates/ide/src/typing.rs#42) 
+
+Some features trigger on typing certain characters:
+
+- typing `let =` tries to smartly add `;` if `=` is followed by an existing expression
+- typing `=` between two expressions adds `;` when in statement position
+- typing `=` to turn an assignment into an equality comparison removes `;` when in expression position
+- typing `.` in a chain method call auto-indents
+- typing `{` or `(` in front of an expression inserts a closing `}` or `)` after the expression
+- typing `{` in a use item adds a closing `}` in the right place
+- typing `>` to complete a return type `->` will insert a whitespace after it
+
+#### VS Code
+
+Add the following to `settings.json`:
+```json
+"editor.formatOnType": true,
+```
+
+![On Typing Assists](https://user-images.githubusercontent.com/48062697/113166163-69758500-923a-11eb-81ee-eb33ec380399.gif)
+![On Typing Assists](https://user-images.githubusercontent.com/48062697/113171066-105c2000-923f-11eb-87ab-f4a263346567.gif)
+
+
+### Open Docs
+**Source:**  [doc_links.rs](crates/ide/src/doc_links.rs#118) 
+
+Retrieve a links to documentation for the given symbol.
+
+The simplest way to use this feature is via the context menu. Right-click on
+the selected item. The context menu opens. Select **Open Docs**.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Open Docs** |
+
+
+### Parent Module
+**Source:**  [parent_module.rs](crates/ide/src/parent_module.rs#14) 
+
+Navigates to the parent module of the current module.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Locate parent module** |
+
+![Parent Module](https://user-images.githubusercontent.com/48062697/113065580-04c21800-91b1-11eb-9a32-00086161c0bd.gif)
+
+
+### Related Tests
+**Source:**  [runnables.rs](crates/ide/src/runnables.rs#202) 
+
+Provides a sneak peek of all tests where the current item is used.
+
+The simplest way to use this feature is via the context menu. Right-click on
+the selected item. The context menu opens. Select **Peek Related Tests**.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Peek Related Tests** |
+
+
+### Rename
+**Source:**  [rename.rs](crates/ide/src/rename.rs#70) 
+
+Renames the item below the cursor and all of its references
+
+| Editor  | Shortcut |
+|---------|----------|
+| VS Code | <kbd>F2</kbd> |
+
+![Rename](https://user-images.githubusercontent.com/48062697/113065582-055aae80-91b1-11eb-8ade-2b58e6d81883.gif)
+
+
+### Run
+**Source:**  [runnables.rs](crates/ide/src/runnables.rs#116) 
+
+Shows a popup suggesting to run a test/benchmark/binary **at the current cursor
+location**. Super useful for repeatedly running just a single test. Do bind this
+to a shortcut!
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Run** |
+
+![Run](https://user-images.githubusercontent.com/48062697/113065583-055aae80-91b1-11eb-958f-d67efcaf6a2f.gif)
+
+
+### Semantic Syntax Highlighting
+**Source:**  [syntax_highlighting.rs](crates/ide/src/syntax_highlighting.rs#68) 
+
+rust-analyzer highlights the code semantically.
+For example, `Bar` in `foo::Bar` might be colored differently depending on whether `Bar` is an enum or a trait.
+rust-analyzer does not specify colors directly, instead it assigns a tag (like `struct`) and a set of modifiers (like `declaration`) to each token.
+It's up to the client to map those to specific colors.
+
+The general rule is that a reference to an entity gets colored the same way as the entity itself.
+We also give special modifier for `mut` and `&mut` local variables.
+
+
+#### Token Tags
+
+Rust-analyzer currently emits the following token tags:
+
+- For items:
+
+|           |                                |
+|-----------|--------------------------------|
+| attribute |  Emitted for attribute macros. |
+|enum| Emitted for enums. |
+|function| Emitted for free-standing functions. |
+|derive| Emitted for derive macros. |
+|macro| Emitted for function-like macros. |
+|method| Emitted for associated functions, also knowns as methods. |
+|namespace| Emitted for modules. |
+|struct| Emitted for structs.|
+|trait| Emitted for traits.|
+|typeAlias| Emitted for type aliases and `Self` in `impl`s.|
+|union| Emitted for unions.|
+
+- For literals:
+
+|           |                                |
+|-----------|--------------------------------|
+| boolean|  Emitted for the boolean literals `true` and `false`.|
+| character| Emitted for character literals.|
+| number| Emitted for numeric literals.|
+| string| Emitted for string literals.|
+| escapeSequence| Emitted for escaped sequences inside strings like `\n`.|
+| formatSpecifier| Emitted for format specifiers `{:?}` in `format!`-like macros.|
+
+- For operators:
+
+|           |                                |
+|-----------|--------------------------------|
+|operator| Emitted for general operators.|
+|arithmetic| Emitted for the arithmetic operators `+`, `-`, `*`, `/`, `+=`, `-=`, `*=`, `/=`.|
+|bitwise| Emitted for the bitwise operators `|`, `&`, `!`, `^`, `|=`, `&=`, `^=`.|
+|comparison| Emitted for the comparison oerators `>`, `<`, `==`, `>=`, `<=`, `!=`.|
+|logical| Emitted for the logical operatos `||`, `&&`, `!`.|
+
+- For punctuation:
+
+|           |                                |
+|-----------|--------------------------------|
+|punctuation| Emitted for general punctuation.|
+|attributeBracket| Emitted for attribute invocation brackets, that is the `#[` and `]` tokens.|
+|angle| Emitted for `<>` angle brackets.|
+|brace| Emitted for `{}` braces.|
+|bracket| Emitted for `[]` brackets.|
+|parenthesis| Emitted for `()` parentheses.|
+|colon| Emitted for the `:` token.|
+|comma| Emitted for the `,` token.|
+|dot| Emitted for the `.` token.|
+|semi| Emitted for the `;` token.|
+|macroBang| Emitted for the `!` token in macro calls.|
+
+-
+
+|           |                                |
+|-----------|--------------------------------|
+|builtinAttribute| Emitted for names to builtin attributes in attribute path, the `repr` in `#[repr(u8)]` for example.|
+|builtinType| Emitted for builtin types like `u32`, `str` and `f32`.|
+|comment| Emitted for comments.|
+|constParameter| Emitted for const parameters.|
+|deriveHelper| Emitted for derive helper attributes.|
+|enumMember| Emitted for enum variants.|
+|generic| Emitted for generic tokens that have no mapping.|
+|keyword| Emitted for keywords.|
+|label| Emitted for labels.|
+|lifetime| Emitted for lifetimes.|
+|parameter| Emitted for non-self function parameters.|
+|property| Emitted for struct and union fields.|
+|selfKeyword| Emitted for the self function parameter and self path-specifier.|
+|selfTypeKeyword| Emitted for the Self type parameter.|
+|toolModule| Emitted for tool modules.|
+|typeParameter| Emitted for type parameters.|
+|unresolvedReference| Emitted for unresolved references, names that rust-analyzer can't find the definition of.|
+|variable| Emitted for locals, constants and statics.|
+
+
+#### Token Modifiers
+
+Token modifiers allow to style some elements in the source code more precisely.
+
+Rust-analyzer currently emits the following token modifiers:
+
+|           |                                |
+|-----------|--------------------------------|
+|async| Emitted for async functions and the `async` and `await` keywords.|
+|attribute| Emitted for tokens inside attributes.|
+|callable| Emitted for locals whose types implements one of the `Fn*` traits.|
+|constant| Emitted for const.|
+|consuming| Emitted for locals that are being consumed when use in a function call.|
+|controlFlow| Emitted for control-flow related tokens, this includes th `?` operator.|
+|crateRoot| Emitted for crate names, like `serde` and `crate.|
+|declaration| Emitted for names of definitions, like `foo` in `fn foo(){}`.|
+|defaultLibrary| Emitted for items from built-in crates (std, core, allc, test and proc_macro).|
+|documentation| Emitted for documentation comment.|
+|injected| Emitted for doc-string injected highlighting like rust source blocks in documentation.|
+|intraDocLink| Emitted for intra doc links in doc-string.|
+|library| Emitted for items that are defined outside of the current crae.|
+|macro|  Emitted for tokens inside macro call.|
+|mutable| Emitted for mutable locals and statics as well as functions taking `&mut self`.|
+|public| Emitted for items that are from the current crate and are `pub.|
+|reference| Emitted for locals behind a reference and functions taking self` by reference.|
+|static| Emitted for "static" functions, also known as functions that d not take a `self` param, as well as statics and consts.|
+|trait| Emitted for associated trait item.|
+|unsafe| Emitted for unsafe operations, like unsafe function calls, as ell as the `unsafe` token.|
+
+![Semantic Syntax Highlighting](https://user-images.githubusercontent.com/48062697/113164457-06cfb980-9239-11eb-819b-0f93e646acf8.png)
+![Semantic Syntax Highlighting](https://user-images.githubusercontent.com/48062697/113187625-f7f50100-9250-11eb-825e-91c58f236071.png)
+
+
+### Show Dependency Tree
+**Source:**  [fetch_crates.rs](crates/ide/src/fetch_crates.rs#13) 
+
+Shows a view tree with all the dependencies of this project
+
+| Editor  | Panel Name |
+|---------|------------|
+| VS Code | **Rust Dependencies** |
+
+![Show Dependency Tree](https://user-images.githubusercontent.com/5748995/229394139-2625beab-f4c9-484b-84ed-ad5dee0b1e1a.png)
+
+
+### Show Syntax Tree
+**Source:**  [view_syntax_tree.rs](crates/ide/src/view_syntax_tree.rs#14) 
+
+Shows a tree view with the syntax tree of the current file
+
+| Editor  | Panel Name |
+|---------|-------------|
+| VS Code | **Rust Syntax Tree** |
+
+
+### Status
+**Source:**  [status.rs](crates/ide/src/status.rs#28) 
+
+Shows internal statistic about memory usage of rust-analyzer.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: Status** |
+
+![Status](https://user-images.githubusercontent.com/48062697/113065584-05f34500-91b1-11eb-98cc-5c196f76be7f.gif)
+
+
+### Structural Search and Replace
+**Source:**  [lib.rs](crates/ide-ssr/src/lib.rs#6) 
+
+Search and replace with named wildcards that will match any expression, type, path, pattern or item.
+The syntax for a structural search replace command is `<search_pattern> ==>> <replace_pattern>`.
+A `$<name>` placeholder in the search pattern will match any AST node and `$<name>` will reference it in the replacement.
+Within a macro call, a placeholder will match up until whatever token follows the placeholder.
+
+All paths in both the search pattern and the replacement template must resolve in the context
+in which this command is invoked. Paths in the search pattern will then match the code if they
+resolve to the same item, even if they're written differently. For example if we invoke the
+command in the module `foo` with a pattern of `Bar`, then code in the parent module that refers
+to `foo::Bar` will match.
+
+Paths in the replacement template will be rendered appropriately for the context in which the
+replacement occurs. For example if our replacement template is `foo::Bar` and we match some
+code in the `foo` module, we'll insert just `Bar`.
+
+Inherent method calls should generally be written in UFCS form. e.g. `foo::Bar::baz($s, $a)` will
+match `$s.baz($a)`, provided the method call `baz` resolves to the method `foo::Bar::baz`. When a
+placeholder is the receiver of a method call in the search pattern (e.g. `$s.foo()`), but not in
+the replacement template (e.g. `bar($s)`), then *, & and &mut will be added as needed to mirror
+whatever autoderef and autoref was happening implicitly in the matched code.
+
+The scope of the search / replace will be restricted to the current selection if any, otherwise
+it will apply to the whole workspace.
+
+Placeholders may be given constraints by writing them as `${<name>:<constraint1>:<constraint2>...}`.
+
+Supported constraints:
+
+| Constraint    | Restricts placeholder |
+|---------------|------------------------|
+| kind(literal) | Is a literal (e.g. `42` or `"forty two"`) |
+| not(a)        | Negates the constraint `a` |
+
+Available via the command `rust-analyzer.ssr`.
+
+```rust
+// Using structural search replace command [foo($a, $b) ==>> ($a).foo($b)]
+
+// BEFORE
+String::from(foo(y + 5, z))
+
+// AFTER
+String::from((y + 5).foo(z))
+```
+
+| Editor  | Action Name |
+|---------|--------------|
+| VS Code | **rust-analyzer: Structural Search Replace** |
+
+Also available as an assist, by writing a comment containing the structural
+search and replace rule. You will only see the assist if the comment can
+be parsed as a valid structural search and replace rule.
+
+```rust
+// Place the cursor on the line below to see the assist 💡.
+// foo($a, $b) ==>> ($a).foo($b)
+```
+
+
+### User Snippet Completions
+**Source:**  [snippet.rs](crates/ide-completion/src/snippet.rs#5) 
+
+rust-analyzer allows the user to define custom (postfix)-snippets that may depend on items to be accessible for the current scope to be applicable.
+
+A custom snippet can be defined by adding it to the `rust-analyzer.completion.snippets.custom` object respectively.
+
+```json
+{
+  "rust-analyzer.completion.snippets.custom": {
+    "thread spawn": {
+      "prefix": ["spawn", "tspawn"],
+      "body": [
+        "thread::spawn(move || {",
+        "\t$0",
+        "});",
+      ],
+      "description": "Insert a thread::spawn call",
+      "requires": "std::thread",
+      "scope": "expr",
+    }
+  }
+}
+```
+
+In the example above:
+
+* `"thread spawn"` is the name of the snippet.
+
+* `prefix` defines one or more trigger words that will trigger the snippets completion.
+Using `postfix` will instead create a postfix snippet.
+
+* `body` is one or more lines of content joined via newlines for the final output.
+
+* `description` is an optional description of the snippet, if unset the snippet name will be used.
+
+* `requires` is an optional list of item paths that have to be resolvable in the current crate where the completion is rendered.
+
+
+### View Crate Graph
+**Source:**  [view_crate_graph.rs](crates/ide/src/view_crate_graph.rs#8) 
+
+Renders the currently loaded crate graph as an SVG graphic. Requires the `dot` tool, which
+is part of graphviz, to be installed.
+
+Only workspace crates are included, no crates.io dependencies or sysroot crates.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: View Crate Graph** |
+
+
+### View Hir
+**Source:**  [view_hir.rs](crates/ide/src/view_hir.rs#5) 
+
+| Editor  | Action Name |
+|---------|--------------|
+| VS Code | **rust-analyzer: View Hir**
+
+![View Hir](https://user-images.githubusercontent.com/48062697/113065588-068bdb80-91b1-11eb-9a78-0b4ef1e972fb.gif)
+
+
+### View Memory Layout
+**Source:**  [view_memory_layout.rs](crates/ide/src/view_memory_layout.rs#74) 
+
+Displays the recursive memory layout of a datatype.
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: View Memory Layout** |
+
+
+### View Mir
+**Source:**  [view_mir.rs](crates/ide/src/view_mir.rs#5) 
+
+| Editor  | Action Name |
+|---------|-------------|
+| VS Code | **rust-analyzer: View Mir**
+
+
+### Workspace Symbol
+**Source:**  [symbol_index.rs](crates/ide-db/src/symbol_index.rs#174) 
+
+Uses fuzzy-search to find types, modules and functions by name across your
+project and dependencies. This is **the** most useful feature, which improves code
+navigation tremendously. It mostly works on top of the built-in LSP
+functionality, however `#` and `*` symbols can be used to narrow down the
+search. Specifically,
+
+- `Foo` searches for `Foo` type in the current workspace
+- `foo#` searches for `foo` function in the current workspace
+- `Foo*` searches for `Foo` type among dependencies, including `stdlib`
+- `foo#*` searches for `foo` function among dependencies
+
+That is, `#` switches from "types" to all symbols, `*` switches from the current
+workspace to dependencies.
+
+Note that filtering does not currently work in VSCode due to the editor never
+sending the special symbols to the language server. Instead, you can configure
+the filtering via the `rust-analyzer.workspace.symbol.search.scope` and
+`rust-analyzer.workspace.symbol.search.kind` settings. Symbols prefixed
+with `__` are hidden from the search results unless configured otherwise.
+
+| Editor  | Shortcut |
+|---------|-----------|
+| VS Code | <kbd>Ctrl+T</kbd>
diff --git a/src/tools/rust-analyzer/docs/book/src/installation.md b/src/tools/rust-analyzer/docs/book/src/installation.md
index 5b697e9bc33d4..3a4c0cf227749 100644
--- a/src/tools/rust-analyzer/docs/book/src/installation.md
+++ b/src/tools/rust-analyzer/docs/book/src/installation.md
@@ -1,19 +1,19 @@
 # Installation
 
-In theory, one should be able to just install the [`rust-analyzer`
-binary](#rust-analyzer-language-server-binary) and have it automatically
-work with any editor. We are not there yet, so some editor specific
-setup is required.
+To use rust-analyzer, you need a `rust-analyzer` binary, a text editor
+that supports LSP, and the source code of the Rust standard library.
 
-Additionally, rust-analyzer needs the sources of the standard library.
-If the source code is not present, rust-analyzer will attempt to install
-it automatically.
+If you're [using VS Code](./vs_code.html), the extension bundles a
+copy of the `rust-analyzer` binary. For other editors, you'll need to
+[install the binary](./rust_analyzer_binary.html) and [configure your
+editor](./other_editors.html).
 
-To add the sources manually, run the following command:
+## Rust Standard Library
 
-    $ rustup component add rust-src
+rust-analyzer will attempt to install the standard library source code
+automatically. You can also install it manually with `rustup`.
 
-## Toolchain
+    $ rustup component add rust-src
 
 Only the latest stable standard library source is officially supported
 for use with rust-analyzer. If you are using an older toolchain or have
@@ -25,620 +25,16 @@ If you are using an override in your project, you can still force
 rust-analyzer to use the stable toolchain via the environment variable
 `RUSTUP_TOOLCHAIN`. For example, with VS Code or coc-rust-analyzer:
 
-    { "rust-analyzer.server.extraEnv": { "RUSTUP_TOOLCHAIN": "stable" } }
-
-## VS Code
-
-This is the best supported editor at the moment. The rust-analyzer
-plugin for VS Code is maintained [in
-tree](https://github.com/rust-lang/rust-analyzer/tree/master/editors/code).
-
-You can install the latest release of the plugin from [the
-marketplace](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer).
-
-Note that the plugin may cause conflicts with the [previous official
-Rust
-plugin](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust).
-The latter is no longer maintained and should be uninstalled.
-
-The server binary is stored in the extension install directory, which
-starts with `rust-lang.rust-analyzer-` and is located under:
-
--   Linux: `~/.vscode/extensions`
-
--   Linux (Remote, such as WSL): `~/.vscode-server/extensions`
-
--   macOS: `~/.vscode/extensions`
-
--   Windows: `%USERPROFILE%\.vscode\extensions`
-
-As an exception, on NixOS, the extension makes a copy of the server and
-stores it under
-`~/.config/Code/User/globalStorage/rust-lang.rust-analyzer`.
-
-Note that we only support the two most recent versions of VS Code.
-
-### Updates
-
-The extension will be updated automatically as new versions become
-available. It will ask your permission to download the matching language
-server version binary if needed.
-
-#### Nightly
-
-We ship nightly releases for VS Code. To help us out by testing the
-newest code, you can enable pre-release versions in the Code extension
-page.
-
-### Manual installation
-
-Alternatively, download a VSIX corresponding to your platform from the
-[releases](https://github.com/rust-lang/rust-analyzer/releases) page.
-
-Install the extension with the `Extensions: Install from VSIX` command
-within VS Code, or from the command line via:
-
-    $ code --install-extension /path/to/rust-analyzer.vsix
-
-If you are running an unsupported platform, you can install
-`rust-analyzer-no-server.vsix` and compile or obtain a server binary.
-Copy the server anywhere, then add the path to your settings.json, for
-example:
-
-    { "rust-analyzer.server.path": "~/.local/bin/rust-analyzer-linux" }
-
-### Building From Source
-
-Both the server and the Code plugin can be installed from source:
-
-    $ git clone https://github.com/rust-lang/rust-analyzer.git && cd rust-analyzer
-    $ cargo xtask install
-
-You’ll need Cargo, nodejs (matching a supported version of VS Code) and
-npm for this.
-
-Note that installing via `xtask install` does not work for VS Code
-Remote, instead you’ll need to install the `.vsix` manually.
-
-If you’re not using Code, you can compile and install only the LSP
-server:
-
-    $ cargo xtask install --server
-
-Make sure that `.cargo/bin` is in `$PATH` and precedes paths where
-`rust-analyzer` may also be installed. Specifically, `rustup` includes a
-proxy called `rust-analyzer`, which can cause problems if you’re
-planning to use a source build or even a downloaded binary.
-
-## rust-analyzer Language Server Binary
-
-Other editors generally require the `rust-analyzer` binary to be in
-`$PATH`. You can download pre-built binaries from the
-[releases](https://github.com/rust-lang/rust-analyzer/releases) page.
-You will need to uncompress and rename the binary for your platform,
-e.g. from `rust-analyzer-aarch64-apple-darwin.gz` on Mac OS to
-`rust-analyzer`, make it executable, then move it into a directory in
-your `$PATH`.
-
-On Linux to install the `rust-analyzer` binary into `~/.local/bin`,
-these commands should work:
-
-    $ mkdir -p ~/.local/bin
-    $ curl -L https://github.com/rust-lang/rust-analyzer/releases/latest/download/rust-analyzer-x86_64-unknown-linux-gnu.gz | gunzip -c - > ~/.local/bin/rust-analyzer
-    $ chmod +x ~/.local/bin/rust-analyzer
-
-Make sure that `~/.local/bin` is listed in the `$PATH` variable and use
-the appropriate URL if you’re not on a `x86-64` system.
-
-You don’t have to use `~/.local/bin`, any other path like `~/.cargo/bin`
-or `/usr/local/bin` will work just as well.
-
-Alternatively, you can install it from source using the command below.
-You’ll need the latest stable version of the Rust toolchain.
-
-    $ git clone https://github.com/rust-lang/rust-analyzer.git && cd rust-analyzer
-    $ cargo xtask install --server
-
-If your editor can’t find the binary even though the binary is on your
-`$PATH`, the likely explanation is that it doesn’t see the same `$PATH`
-as the shell, see [this
-issue](https://github.com/rust-lang/rust-analyzer/issues/1811). On Unix,
-running the editor from a shell or changing the `.desktop` file to set
-the environment should help.
-
-### rustup
-
-`rust-analyzer` is available in `rustup`:
-
-    $ rustup component add rust-analyzer
-
-### Arch Linux
-
-The `rust-analyzer` binary can be installed from the repos or AUR (Arch
-User Repository):
-
--   [`rust-analyzer`](https://www.archlinux.org/packages/extra/x86_64/rust-analyzer/)
-    (built from latest tagged source)
-
--   [`rust-analyzer-git`](https://aur.archlinux.org/packages/rust-analyzer-git)
-    (latest Git version)
-
-Install it with pacman, for example:
-
-    $ pacman -S rust-analyzer
-
-### Gentoo Linux
-
-`rust-analyzer` is installed when the `rust-analyzer` use flag is set for dev-lang/rust or dev-lang/rust-bin. You also need to set the `rust-src` use flag.
-
-### macOS
-
-The `rust-analyzer` binary can be installed via
-[Homebrew](https://brew.sh/).
-
-    $ brew install rust-analyzer
-
-### Windows
-
-It is recommended to install the latest Microsoft Visual C++ Redistributable prior to installation.
-Download links can be found
-[here](https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist).
-
-## VS Code or VSCodium in Flatpak
-
-Setting up `rust-analyzer` with a Flatpak version of Code is not trivial
-because of the Flatpak sandbox. While the sandbox can be disabled for
-some directories, `/usr/bin` will always be mounted under
-`/run/host/usr/bin`. This prevents access to the system’s C compiler, a
-system-wide installation of Rust, or any other libraries you might want
-to link to. Some compilers and libraries can be acquired as Flatpak
-SDKs, such as `org.freedesktop.Sdk.Extension.rust-stable` or
-`org.freedesktop.Sdk.Extension.llvm15`.
-
-If you use a Flatpak SDK for Rust, it must be in your `PATH`:
-
- * install the SDK extensions with `flatpak install org.freedesktop.Sdk.Extension.{llvm15,rust-stable}//23.08`
- * enable SDK extensions in the editor with the environment variable `FLATPAK_ENABLE_SDK_EXT=llvm15,rust-stable` (this can be done using flatseal or `flatpak override`)
-
-If you want to use Flatpak in combination with `rustup`, the following
-steps might help:
-
--   both Rust and `rustup` have to be installed using
-    <https://rustup.rs>. Distro packages *will not* work.
-
--   you need to launch Code, open a terminal and run `echo $PATH`
-
--   using
-    [Flatseal](https://flathub.org/apps/details/com.github.tchx84.Flatseal),
-    you must add an environment variable called `PATH`. Set its value to
-    the output from above, appending `:~/.cargo/bin`, where `~` is the
-    path to your home directory. You must replace `~`, as it won’t be
-    expanded otherwise.
-
--   while Flatseal is open, you must enable access to "All user files"
-
-A C compiler should already be available via `org.freedesktop.Sdk`. Any
-other tools or libraries you will need to acquire from Flatpak.
-
-## Emacs
-
-Prerequisites: You have installed the [`rust-analyzer`
-binary](#rust-analyzer-language-server-binary).
-
-To use `rust-analyzer`, you need to install and enable one of the two
-popular LSP client implementations for Emacs,
-[Eglot](https://github.com/joaotavora/eglot) or [LSP
-Mode](https://github.com/emacs-lsp/lsp-mode). Both enable
-`rust-analyzer` by default in rust buffers if it is available.
-
-### Eglot
-
-Eglot is the more minimalistic and lightweight LSP client for Emacs,
-integrates well with existing Emacs functionality and is built into
-Emacs starting from release 29.
-
-After installing Eglot, e.g. via `M-x package-install` (not needed from
-Emacs 29), you can enable it via the `M-x eglot` command or load it
-automatically in `rust-mode` via
-
-    (add-hook 'rust-mode-hook 'eglot-ensure)
-
-To enable clippy, you will need to configure the initialization options
-to pass the `check.command` setting.
-
-    (add-to-list 'eglot-server-programs
-                 '((rust-ts-mode rust-mode) .
-                   ("rust-analyzer" :initializationOptions (:check (:command "clippy")))))
-
-For more detailed instructions and options see the [Eglot
-manual](https://joaotavora.github.io/eglot) (also available from Emacs
-via `M-x info`) and the [Eglot
-readme](https://github.com/joaotavora/eglot/blob/master/README.md).
-
-Eglot does not support the rust-analyzer extensions to the
-language-server protocol and does not aim to do so in the future. The
-[eglot-x](https://github.com/nemethf/eglot-x#rust-analyzer-extensions)
-package adds experimental support for those LSP extensions.
-
-### LSP Mode
-
-LSP-mode is the original LSP-client for emacs. Compared to Eglot it has
-a larger codebase and supports more features, like LSP protocol
-extensions. With extension packages like [LSP
-UI](https://github.com/emacs-lsp/lsp-mode) it offers a lot of visual
-eyecandy. Further it integrates well with [DAP
-mode](https://github.com/emacs-lsp/dap-mode) for support of the Debug
-Adapter Protocol.
-
-You can install LSP-mode via `M-x package-install` and then run it via
-the `M-x lsp` command or load it automatically in rust buffers with
-
-    (add-hook 'rust-mode-hook 'lsp-deferred)
-
-For more information on how to set up LSP mode and its extension package
-see the instructions in the [LSP mode
-manual](https://emacs-lsp.github.io/lsp-mode/page/installation). Also
-see the [rust-analyzer
-section](https://emacs-lsp.github.io/lsp-mode/page/lsp-rust-analyzer/)
-for `rust-analyzer` specific options and commands, which you can
-optionally bind to keys.
-
-Note the excellent
-[guide](https://robert.kra.hn/posts/2021-02-07_rust-with-emacs/) from
-[@rksm](https://github.com/rksm) on how to set-up Emacs for Rust
-development with LSP mode and several other packages.
-
-## Vim/Neovim
-
-Prerequisites: You have installed the [`rust-analyzer`
-binary](#rust-analyzer-language-server-binary). Not needed if the
-extension can install/update it on its own, coc-rust-analyzer is one
-example.
-
-There are several LSP client implementations for Vim or Neovim:
-
-### coc-rust-analyzer
-
-1.  Install coc.nvim by following the instructions at
-    [coc.nvim](https://github.com/neoclide/coc.nvim) (Node.js required)
-
-2.  Run `:CocInstall coc-rust-analyzer` to install
-    [coc-rust-analyzer](https://github.com/fannheyward/coc-rust-analyzer),
-    this extension implements *most* of the features supported in the
-    VSCode extension:
-
-    -   automatically install and upgrade stable/nightly releases
-
-    -   same configurations as VSCode extension,
-        `rust-analyzer.server.path`, `rust-analyzer.cargo.features` etc.
-
-    -   same commands too, `rust-analyzer.analyzerStatus`,
-        `rust-analyzer.ssr` etc.
-
-    -   inlay hints for variables and method chaining, *Neovim Only*
-
-Note: for code actions, use `coc-codeaction-cursor` and
-`coc-codeaction-selected`; `coc-codeaction` and `coc-codeaction-line`
-are unlikely to be useful.
-
-### LanguageClient-neovim
-
-1.  Install LanguageClient-neovim by following the instructions
-    [here](https://github.com/autozimu/LanguageClient-neovim)
-
-    -   The GitHub project wiki has extra tips on configuration
-
-2.  Configure by adding this to your Vim/Neovim config file (replacing
-    the existing Rust-specific line if it exists):
-
-        let g:LanguageClient_serverCommands = {
-        \ 'rust': ['rust-analyzer'],
-        \ }
-
-### YouCompleteMe
-
-Install YouCompleteMe by following the instructions
-[here](https://github.com/ycm-core/YouCompleteMe#installation).
-
-rust-analyzer is the default in ycm, it should work out of the box.
-
-### ALE
-
-To use the LSP server in [ale](https://github.com/dense-analysis/ale):
-
-    let g:ale_linters = {'rust': ['analyzer']}
-
-### nvim-lsp
-
-Neovim 0.5 has built-in language server support. For a quick start
-configuration of rust-analyzer, use
-[neovim/nvim-lspconfig](https://github.com/neovim/nvim-lspconfig#rust_analyzer).
-Once `neovim/nvim-lspconfig` is installed, use
-`lua require'lspconfig'.rust_analyzer.setup({})` in your `init.vim`.
-
-You can also pass LSP settings to the server:
-
-    lua << EOF
-    local lspconfig = require'lspconfig'
-
-    local on_attach = function(client)
-        require'completion'.on_attach(client)
-    end
-
-    lspconfig.rust_analyzer.setup({
-        on_attach = on_attach,
-        settings = {
-            ["rust-analyzer"] = {
-                imports = {
-                    granularity = {
-                        group = "module",
-                    },
-                    prefix = "self",
-                },
-                cargo = {
-                    buildScripts = {
-                        enable = true,
-                    },
-                },
-                procMacro = {
-                    enable = true
-                },
-            }
-        }
-    })
-    EOF
-
-If you're running Neovim 0.10 or later, you can enable inlay hints via `on_attach`:
-
-```vim
-lspconfig.rust_analyzer.setup({
-    on_attach = function(client, bufnr)
-        vim.lsp.inlay_hint.enable(true, { bufnr = bufnr })
-    end
-})
+```json
+{ "rust-analyzer.server.extraEnv": { "RUSTUP_TOOLCHAIN": "stable" } }
 ```
 
-Note that the hints are only visible after `rust-analyzer` has finished loading **and** you have to
-edit the file to trigger a re-render.
-
-See <https://sharksforarms.dev/posts/neovim-rust/> for more tips on
-getting started.
-
-Check out <https://github.com/mrcjkb/rustaceanvim> for a batteries
-included rust-analyzer setup for Neovim.
-
-### vim-lsp
-
-vim-lsp is installed by following [the plugin
-instructions](https://github.com/prabirshrestha/vim-lsp). It can be as
-simple as adding this line to your `.vimrc`:
-
-    Plug 'prabirshrestha/vim-lsp'
-
-Next you need to register the `rust-analyzer` binary. If it is avim.lspvailable
-in `$PATH`, you may want to add this to your `.vimrc`:
-
-    if executable('rust-analyzer')
-      au User lsp_setup call lsp#register_server({
-            \   'name': 'Rust Language Server',
-            \   'cmd': {server_info->['rust-analyzer']},
-            \   'whitelist': ['rust'],
-            \ })
-    endif
-
-There is no dedicated UI for the server configuration, so you would need
-to send any options as a value of the `initialization_options` field, as
-described in the [Configuration](#configuration) section. Here is an
-example of how to enable the proc-macro support:
-
-    if executable('rust-analyzer')
-      au User lsp_setup call lsp#register_server({
-            \   'name': 'Rust Language Server',
-            \   'cmd': {server_info->['rust-analyzer']},
-            \   'whitelist': ['rust'],
-            \   'initialization_options': {
-            \     'cargo': {
-            \       'buildScripts': {
-            \         'enable': v:true,
-            \       },
-            \     },
-            \     'procMacro': {
-            \       'enable': v:true,
-            \     },
-            \   },
-            \ })
-    endif
-
-## Sublime Text
-
-### Sublime Text 4:
-
--   Follow the instructions in
-    [LSP-rust-analyzer](https://github.com/sublimelsp/LSP-rust-analyzer).
-
-Install
-[LSP-file-watcher-chokidar](https://packagecontrol.io/packages/LSP-file-watcher-chokidar)
-to enable file watching (`workspace/didChangeWatchedFiles`).
-
-### Sublime Text 3:
-
--   Install the [`rust-analyzer`
-    binary](#rust-analyzer-language-server-binary).
-
--   Install the [LSP package](https://packagecontrol.io/packages/LSP).
-
--   From the command palette, run `LSP: Enable Language Server Globally`
-    and select `rust-analyzer`.
-
-If it worked, you should see "rust-analyzer, Line X, Column Y" on the
-left side of the status bar, and after waiting a bit, functionalities
-like tooltips on hovering over variables should become available.
-
-If you get an error saying `No such file or directory: 'rust-analyzer'`,
-see the [`rust-analyzer` binary](#rust-analyzer-language-server-binary)
-section on installing the language server binary.
-
-## GNOME Builder
-
-GNOME Builder 3.37.1 and newer has native `rust-analyzer` support. If
-the LSP binary is not available, GNOME Builder can install it when
-opening a Rust file.
-
-## Eclipse IDE
-
-Support for Rust development in the Eclipse IDE is provided by [Eclipse
-Corrosion](https://github.com/eclipse/corrosion). If available in PATH
-or in some standard location, `rust-analyzer` is detected and powers
-editing of Rust files without further configuration. If `rust-analyzer`
-is not detected, Corrosion will prompt you for configuration of your
-Rust toolchain and language server with a link to the *Window &gt;
-Preferences &gt; Rust* preference page; from here a button allows to
-download and configure `rust-analyzer`, but you can also reference
-another installation. You’ll need to close and reopen all .rs and Cargo
-files, or to restart the IDE, for this change to take effect.
-
-## Kate Text Editor
-
-Support for the language server protocol is built into Kate through the
-LSP plugin, which is included by default. It is preconfigured to use
-rust-analyzer for Rust sources since Kate 21.12.
-
-To change rust-analyzer config options, start from the following example
-and put it into Kate’s "User Server Settings" tab (located under the LSP
-Client settings):
-
-    {
-        "servers": {
-            "rust": {
-                "initializationOptions": {
-                    "cachePriming": {
-                        "enable": false
-                    },
-                    "check": {
-                        "allTargets": false
-                    },
-                    "checkOnSave": false
-                }
-            }
-        }
-    }
-
-Then click on apply, and restart the LSP server for your rust project.
-
-## juCi++
-
-[juCi++](https://gitlab.com/cppit/jucipp) has built-in support for the
-language server protocol, and since version 1.7.0 offers installation of
-both Rust and rust-analyzer when opening a Rust file.
-
-## Kakoune
-
-[Kakoune](https://kakoune.org/) supports LSP with the help of
-[`kak-lsp`](https://github.com/kak-lsp/kak-lsp). Follow the
-[instructions](https://github.com/kak-lsp/kak-lsp#installation) to
-install `kak-lsp`. To configure `kak-lsp`, refer to the [configuration
-section](https://github.com/kak-lsp/kak-lsp#configuring-kak-lsp) which
-is basically about copying the [configuration
-file](https://github.com/kak-lsp/kak-lsp/blob/master/kak-lsp.toml) in
-the right place (latest versions should use `rust-analyzer` by default).
-
-Finally, you need to configure Kakoune to talk to `kak-lsp` (see [Usage
-section](https://github.com/kak-lsp/kak-lsp#usage)). A basic
-configuration will only get you LSP but you can also activate inlay
-diagnostics and auto-formatting on save. The following might help you
-get all of this.
-
-    eval %sh{kak-lsp --kakoune -s $kak_session}  # Not needed if you load it with plug.kak.
-    hook global WinSetOption filetype=rust %{
-        # Enable LSP
-        lsp-enable-window
-
-        # Auto-formatting on save
-        hook window BufWritePre .* lsp-formatting-sync
-
-        # Configure inlay hints (only on save)
-        hook window -group rust-inlay-hints BufWritePost .* rust-analyzer-inlay-hints
-        hook -once -always window WinSetOption filetype=.* %{
-            remove-hooks window rust-inlay-hints
-        }
-    }
-
-## Helix
-
-[Helix](https://docs.helix-editor.com/) supports LSP by default.
-However, it won’t install `rust-analyzer` automatically. You can follow
-instructions for installing [`rust-analyzer`
-binary](#rust-analyzer-language-server-binary).
-
-## Visual Studio 2022
-
-There are multiple rust-analyzer extensions for Visual Studio 2022 on
-Windows:
-
-### rust-analyzer.vs
-
-(License: Creative Commons Attribution-NonCommercial-ShareAlike 4.0
-International)
-
-[Visual Studio
-Marketplace](https://marketplace.visualstudio.com/items?itemName=kitamstudios.RustAnalyzer)
-
-[GitHub](https://github.com/kitamstudios/rust-analyzer/)
-
-Support for Rust development in the Visual Studio IDE is enabled by the
-[rust-analyzer](https://marketplace.visualstudio.com/items?itemName=kitamstudios.RustAnalyzer)
-package. Either click on the download link or install from IDE’s
-extension manager. For now [Visual Studio
-2022](https://visualstudio.microsoft.com/downloads/) is required. All
-editions are supported viz. Community, Professional & Enterprise. The
-package aims to provide 0-friction installation and therefore comes
-loaded with most things required including rust-analyzer binary. If
-anything it needs is missing, appropriate errors / warnings will guide
-the user. E.g. cargo.exe needs to be in path and the package will tell
-you as much. This package is under rapid active development. So if you
-encounter any issues please file it at
-[rust-analyzer.vs](https://github.com/kitamstudios/rust-analyzer/).
-
-### VS\_RustAnalyzer
-
-(License: GPL)
-
-[Visual Studio
-Marketplace](https://marketplace.visualstudio.com/items?itemName=cchharris.vsrustanalyzer)
-
-[GitHub](https://github.com/cchharris/VS-RustAnalyzer)
-
-### SourceGear Rust
-
-(License: closed source)
-
-[Visual Studio
-Marketplace](https://marketplace.visualstudio.com/items?itemName=SourceGear.SourceGearRust)
-
-[GitHub (docs, issues,
-discussions)](https://github.com/sourcegear/rust-vs-extension)
-
--   Free (no-cost)
-
--   Supports all editions of Visual Studio 2022 on Windows: Community,
-    Professional, or Enterprise
-
-## Lapce
-
-[Lapce](https://lapce.dev/) has a Rust plugin which you can install
-directly. Unfortunately, it downloads an old version of `rust-analyzer`,
-but you can set the server path under Settings.
-
 ## Crates
 
 There is a package named `ra_ap_rust_analyzer` available on
-[crates.io](https://crates.io/crates/ra_ap_rust-analyzer), for someone
-who wants to use it programmatically.
+[crates.io](https://crates.io/crates/ra_ap_rust-analyzer), for people
+who want to use rust-analyzer programmatically.
 
 For more details, see [the publish
 workflow](https://github.com/rust-lang/rust-analyzer/blob/master/.github/workflows/autopublish.yaml).
 
-## Zed
-
-[Zed](https://zed.dev) has native `rust-analyzer` support. If the LSP
-binary is not available, Zed can install it when opening a Rust file.
diff --git a/src/tools/rust-analyzer/docs/book/src/other_editors.md b/src/tools/rust-analyzer/docs/book/src/other_editors.md
new file mode 100644
index 0000000000000..0a9a453e0137a
--- /dev/null
+++ b/src/tools/rust-analyzer/docs/book/src/other_editors.md
@@ -0,0 +1,423 @@
+# Other Editors
+
+rust-analyzer works with any editor that supports the [Language Server
+Protocol](https://microsoft.github.io/language-server-protocol/).
+
+This page assumes that you have already [installed the rust-analyzer
+binary](./rust_analyzer_binary.html).
+
+## Emacs
+
+To use `rust-analyzer`, you need to install and enable one of the two
+popular LSP client implementations for Emacs,
+[Eglot](https://github.com/joaotavora/eglot) or [LSP
+Mode](https://github.com/emacs-lsp/lsp-mode). Both enable
+`rust-analyzer` by default in Rust buffers if it is available.
+
+### Eglot
+
+Eglot is the more minimalistic and lightweight LSP client for Emacs,
+integrates well with existing Emacs functionality and is built into
+Emacs starting from release 29.
+
+After installing Eglot, e.g. via `M-x package-install` (not needed from
+Emacs 29), you can enable it via the `M-x eglot` command or load it
+automatically in `rust-mode` via
+
+```
+(add-hook 'rust-mode-hook 'eglot-ensure)
+```
+
+To enable clippy, you will need to configure the initialization options
+to pass the `check.command` setting.
+
+```
+(add-to-list 'eglot-server-programs
+             '((rust-ts-mode rust-mode) .
+               ("rust-analyzer" :initializationOptions (:check (:command "clippy")))))
+```
+
+For more detailed instructions and options see the [Eglot
+manual](https://joaotavora.github.io/eglot) (also available from Emacs
+via `M-x info`) and the [Eglot
+readme](https://github.com/joaotavora/eglot/blob/master/README.md).
+
+Eglot does not support the rust-analyzer extensions to the
+language-server protocol and does not aim to do so in the future. The
+[eglot-x](https://github.com/nemethf/eglot-x#rust-analyzer-extensions)
+package adds experimental support for those LSP extensions.
+
+### LSP Mode
+
+LSP-mode is the original LSP-client for emacs. Compared to Eglot it has
+a larger codebase and supports more features, like LSP protocol
+extensions. With extension packages like [LSP
+UI](https://github.com/emacs-lsp/lsp-mode) it offers a lot of visual
+eyecandy. Further it integrates well with [DAP
+mode](https://github.com/emacs-lsp/dap-mode) for support of the Debug
+Adapter Protocol.
+
+You can install LSP-mode via `M-x package-install` and then run it via
+the `M-x lsp` command or load it automatically in rust buffers with
+
+```
+(add-hook 'rust-mode-hook 'lsp-deferred)
+```
+
+For more information on how to set up LSP mode and its extension package
+see the instructions in the [LSP mode
+manual](https://emacs-lsp.github.io/lsp-mode/page/installation). Also
+see the [rust-analyzer
+section](https://emacs-lsp.github.io/lsp-mode/page/lsp-rust-analyzer/)
+for `rust-analyzer` specific options and commands, which you can
+optionally bind to keys.
+
+Note the excellent
+[guide](https://robert.kra.hn/posts/2021-02-07_rust-with-emacs/) from
+[@rksm](https://github.com/rksm) on how to set-up Emacs for Rust
+development with LSP mode and several other packages.
+
+## Vim/Neovim
+
+There are several LSP client implementations for Vim or Neovim:
+
+### coc-rust-analyzer
+
+1.  Install coc.nvim by following the instructions at
+    [coc.nvim](https://github.com/neoclide/coc.nvim) (Node.js required)
+
+2.  Run `:CocInstall coc-rust-analyzer` to install
+    [coc-rust-analyzer](https://github.com/fannheyward/coc-rust-analyzer),
+    this extension implements *most* of the features supported in the
+    VSCode extension:
+
+    -   automatically install and upgrade stable/nightly releases
+
+    -   same configurations as VSCode extension,
+        `rust-analyzer.server.path`, `rust-analyzer.cargo.features` etc.
+
+    -   same commands too, `rust-analyzer.analyzerStatus`,
+        `rust-analyzer.ssr` etc.
+
+    -   inlay hints for variables and method chaining, *Neovim Only*
+
+Note: coc-rust-analyzer is capable of installing or updating the
+rust-analyzer binary on its own.
+
+Note: for code actions, use `coc-codeaction-cursor` and
+`coc-codeaction-selected`; `coc-codeaction` and `coc-codeaction-line`
+are unlikely to be useful.
+
+### LanguageClient-neovim
+
+1.  Install LanguageClient-neovim by following the instructions
+    [here](https://github.com/autozimu/LanguageClient-neovim)
+
+    -   The GitHub project wiki has extra tips on configuration
+
+2.  Configure by adding this to your Vim/Neovim config file (replacing
+    the existing Rust-specific line if it exists):
+
+        let g:LanguageClient_serverCommands = {
+        \ 'rust': ['rust-analyzer'],
+        \ }
+
+### YouCompleteMe
+
+Install YouCompleteMe by following the instructions
+[here](https://github.com/ycm-core/YouCompleteMe#installation).
+
+rust-analyzer is the default in ycm, it should work out of the box.
+
+### ALE
+
+To use the LSP server in [ale](https://github.com/dense-analysis/ale):
+
+    let g:ale_linters = {'rust': ['analyzer']}
+
+### nvim-lsp
+
+Neovim 0.5 has built-in language server support. For a quick start
+configuration of rust-analyzer, use
+[neovim/nvim-lspconfig](https://github.com/neovim/nvim-lspconfig#rust_analyzer).
+Once `neovim/nvim-lspconfig` is installed, use
+`lua require'lspconfig'.rust_analyzer.setup({})` in your `init.vim`.
+
+You can also pass LSP settings to the server:
+
+```lua
+lua << EOF
+local lspconfig = require'lspconfig'
+
+local on_attach = function(client)
+    require'completion'.on_attach(client)
+end
+
+lspconfig.rust_analyzer.setup({
+    on_attach = on_attach,
+    settings = {
+        ["rust-analyzer"] = {
+            imports = {
+                granularity = {
+                    group = "module",
+                },
+                prefix = "self",
+            },
+            cargo = {
+                buildScripts = {
+                    enable = true,
+                },
+            },
+            procMacro = {
+                enable = true
+            },
+        }
+    }
+})
+EOF
+```
+
+If you're running Neovim 0.10 or later, you can enable inlay hints via `on_attach`:
+
+```lua
+lspconfig.rust_analyzer.setup({
+    on_attach = function(client, bufnr)
+        vim.lsp.inlay_hint.enable(true, { bufnr = bufnr })
+    end
+})
+```
+
+Note that the hints are only visible after `rust-analyzer` has finished loading **and** you have to
+edit the file to trigger a re-render.
+
+See <https://sharksforarms.dev/posts/neovim-rust/> for more tips on
+getting started.
+
+Check out <https://github.com/mrcjkb/rustaceanvim> for a batteries
+included rust-analyzer setup for Neovim.
+
+### vim-lsp
+
+vim-lsp is installed by following [the plugin
+instructions](https://github.com/prabirshrestha/vim-lsp). It can be as
+simple as adding this line to your `.vimrc`:
+
+    Plug 'prabirshrestha/vim-lsp'
+
+Next you need to register the `rust-analyzer` binary. If it is avim.lspvailable
+in `$PATH`, you may want to add this to your `.vimrc`:
+
+    if executable('rust-analyzer')
+      au User lsp_setup call lsp#register_server({
+            \   'name': 'Rust Language Server',
+            \   'cmd': {server_info->['rust-analyzer']},
+            \   'whitelist': ['rust'],
+            \ })
+    endif
+
+There is no dedicated UI for the server configuration, so you would need
+to send any options as a value of the `initialization_options` field, as
+described in the [Configuration](#configuration) section. Here is an
+example of how to enable the proc-macro support:
+
+    if executable('rust-analyzer')
+      au User lsp_setup call lsp#register_server({
+            \   'name': 'Rust Language Server',
+            \   'cmd': {server_info->['rust-analyzer']},
+            \   'whitelist': ['rust'],
+            \   'initialization_options': {
+            \     'cargo': {
+            \       'buildScripts': {
+            \         'enable': v:true,
+            \       },
+            \     },
+            \     'procMacro': {
+            \       'enable': v:true,
+            \     },
+            \   },
+            \ })
+    endif
+
+## Sublime Text
+
+### Sublime Text 4:
+
+-   Follow the instructions in
+    [LSP-rust-analyzer](https://github.com/sublimelsp/LSP-rust-analyzer).
+
+Install
+[LSP-file-watcher-chokidar](https://packagecontrol.io/packages/LSP-file-watcher-chokidar)
+to enable file watching (`workspace/didChangeWatchedFiles`).
+
+### Sublime Text 3:
+
+-   Install the [LSP package](https://packagecontrol.io/packages/LSP).
+
+-   From the command palette, run `LSP: Enable Language Server Globally`
+    and select `rust-analyzer`.
+
+If it worked, you should see "rust-analyzer, Line X, Column Y" on the
+left side of the status bar, and after waiting a bit, functionalities
+like tooltips on hovering over variables should become available.
+
+If you get an error saying `No such file or directory: 'rust-analyzer'`,
+see the [rust-analyzer binary installation](./rust_analyzer_binary.html) section.
+
+## GNOME Builder
+
+GNOME Builder 3.37.1 and newer has native `rust-analyzer` support. If
+the LSP binary is not available, GNOME Builder can install it when
+opening a Rust file.
+
+## Eclipse IDE
+
+Support for Rust development in the Eclipse IDE is provided by [Eclipse
+Corrosion](https://github.com/eclipse/corrosion). If available in PATH
+or in some standard location, `rust-analyzer` is detected and powers
+editing of Rust files without further configuration. If `rust-analyzer`
+is not detected, Corrosion will prompt you for configuration of your
+Rust toolchain and language server with a link to the *Window &gt;
+Preferences &gt; Rust* preference page; from here a button allows to
+download and configure `rust-analyzer`, but you can also reference
+another installation. You’ll need to close and reopen all .rs and Cargo
+files, or to restart the IDE, for this change to take effect.
+
+## Kate Text Editor
+
+Support for the language server protocol is built into Kate through the
+LSP plugin, which is included by default. It is preconfigured to use
+rust-analyzer for Rust sources since Kate 21.12.
+
+To change rust-analyzer config options, start from the following example
+and put it into Kate’s "User Server Settings" tab (located under the LSP
+Client settings):
+
+```json
+{
+    "servers": {
+        "rust": {
+            "initializationOptions": {
+                "cachePriming": {
+                    "enable": false
+                },
+                "check": {
+                    "allTargets": false
+                },
+                "checkOnSave": false
+            }
+        }
+    }
+}
+```
+
+Then click on apply, and restart the LSP server for your rust project.
+
+## juCi++
+
+[juCi++](https://gitlab.com/cppit/jucipp) has built-in support for the
+language server protocol, and since version 1.7.0 offers installation of
+both Rust and rust-analyzer when opening a Rust file.
+
+## Kakoune
+
+[Kakoune](https://kakoune.org/) supports LSP with the help of
+[`kak-lsp`](https://github.com/kak-lsp/kak-lsp). Follow the
+[instructions](https://github.com/kak-lsp/kak-lsp#installation) to
+install `kak-lsp`. To configure `kak-lsp`, refer to the [configuration
+section](https://github.com/kak-lsp/kak-lsp#configuring-kak-lsp) which
+is basically about copying the [configuration
+file](https://github.com/kak-lsp/kak-lsp/blob/master/kak-lsp.toml) in
+the right place (latest versions should use `rust-analyzer` by default).
+
+Finally, you need to configure Kakoune to talk to `kak-lsp` (see [Usage
+section](https://github.com/kak-lsp/kak-lsp#usage)). A basic
+configuration will only get you LSP but you can also activate inlay
+diagnostics and auto-formatting on save. The following might help you
+get all of this.
+
+    eval %sh{kak-lsp --kakoune -s $kak_session}  # Not needed if you load it with plug.kak.
+    hook global WinSetOption filetype=rust %{
+        # Enable LSP
+        lsp-enable-window
+
+        # Auto-formatting on save
+        hook window BufWritePre .* lsp-formatting-sync
+
+        # Configure inlay hints (only on save)
+        hook window -group rust-inlay-hints BufWritePost .* rust-analyzer-inlay-hints
+        hook -once -always window WinSetOption filetype=.* %{
+            remove-hooks window rust-inlay-hints
+        }
+    }
+
+## Helix
+
+[Helix](https://docs.helix-editor.com/) supports LSP by default.
+However, it won’t install `rust-analyzer` automatically. You can follow
+instructions for [installing the rust-analyzer
+binary](./rust_analyzer_binary.html).
+
+## Visual Studio 2022
+
+There are multiple rust-analyzer extensions for Visual Studio 2022 on
+Windows:
+
+### rust-analyzer.vs
+
+(License: Creative Commons Attribution-NonCommercial-ShareAlike 4.0
+International)
+
+[Visual Studio
+Marketplace](https://marketplace.visualstudio.com/items?itemName=kitamstudios.RustAnalyzer)
+
+[GitHub](https://github.com/kitamstudios/rust-analyzer/)
+
+Support for Rust development in the Visual Studio IDE is enabled by the
+[rust-analyzer](https://marketplace.visualstudio.com/items?itemName=kitamstudios.RustAnalyzer)
+package. Either click on the download link or install from IDE’s
+extension manager. For now [Visual Studio
+2022](https://visualstudio.microsoft.com/downloads/) is required. All
+editions are supported viz. Community, Professional & Enterprise. The
+package aims to provide 0-friction installation and therefore comes
+loaded with most things required including rust-analyzer binary. If
+anything it needs is missing, appropriate errors / warnings will guide
+the user. E.g. cargo.exe needs to be in path and the package will tell
+you as much. This package is under rapid active development. So if you
+encounter any issues please file it at
+[rust-analyzer.vs](https://github.com/kitamstudios/rust-analyzer/).
+
+### VS RustAnalyzer
+
+(License: GPL)
+
+[Visual Studio
+Marketplace](https://marketplace.visualstudio.com/items?itemName=cchharris.vsrustanalyzer)
+
+[GitHub](https://github.com/cchharris/VS-RustAnalyzer)
+
+### SourceGear Rust
+
+(License: closed source)
+
+[Visual Studio
+Marketplace](https://marketplace.visualstudio.com/items?itemName=SourceGear.SourceGearRust)
+
+[GitHub (docs, issues,
+discussions)](https://github.com/sourcegear/rust-vs-extension)
+
+-   Free (no-cost)
+
+-   Supports all editions of Visual Studio 2022 on Windows: Community,
+    Professional, or Enterprise
+
+## Lapce
+
+[Lapce](https://lapce.dev/) has a Rust plugin which you can install
+directly. Unfortunately, it downloads an old version of `rust-analyzer`,
+but you can set the server path under Settings.
+
+## Zed
+
+[Zed](https://zed.dev) has native `rust-analyzer` support. If the
+rust-analyzer binary is not available, Zed can install it when opening
+a Rust file.
diff --git a/src/tools/rust-analyzer/docs/book/src/rust_analyzer_binary.md b/src/tools/rust-analyzer/docs/book/src/rust_analyzer_binary.md
new file mode 100644
index 0000000000000..c7ac3087ced74
--- /dev/null
+++ b/src/tools/rust-analyzer/docs/book/src/rust_analyzer_binary.md
@@ -0,0 +1,74 @@
+# rust-analyzer Binary
+
+Text editors require the `rust-analyzer` binary to be in
+`$PATH`. You can download pre-built binaries from the
+[releases](https://github.com/rust-lang/rust-analyzer/releases) page.
+You will need to uncompress and rename the binary for your platform,
+e.g. from `rust-analyzer-aarch64-apple-darwin.gz` on Mac OS to
+`rust-analyzer`, make it executable, then move it into a directory in
+your `$PATH`.
+
+On Linux to install the `rust-analyzer` binary into `~/.local/bin`,
+these commands should work:
+
+    $ mkdir -p ~/.local/bin
+    $ curl -L https://github.com/rust-lang/rust-analyzer/releases/latest/download/rust-analyzer-x86_64-unknown-linux-gnu.gz | gunzip -c - > ~/.local/bin/rust-analyzer
+    $ chmod +x ~/.local/bin/rust-analyzer
+
+Make sure that `~/.local/bin` is listed in the `$PATH` variable and use
+the appropriate URL if you’re not on a `x86-64` system.
+
+You don’t have to use `~/.local/bin`, any other path like `~/.cargo/bin`
+or `/usr/local/bin` will work just as well.
+
+Alternatively, you can install it from source using the command below.
+You’ll need the latest stable version of the Rust toolchain.
+
+    $ git clone https://github.com/rust-lang/rust-analyzer.git && cd rust-analyzer
+    $ cargo xtask install --server
+
+If your editor can’t find the binary even though the binary is on your
+`$PATH`, the likely explanation is that it doesn’t see the same `$PATH`
+as the shell, see [this
+issue](https://github.com/rust-lang/rust-analyzer/issues/1811). On Unix,
+running the editor from a shell or changing the `.desktop` file to set
+the environment should help.
+
+### rustup
+
+`rust-analyzer` is available in `rustup`:
+
+    $ rustup component add rust-analyzer
+
+### Arch Linux
+
+The `rust-analyzer` binary can be installed from the repos or AUR (Arch
+User Repository):
+
+-   [`rust-analyzer`](https://www.archlinux.org/packages/extra/x86_64/rust-analyzer/)
+    (built from latest tagged source)
+
+-   [`rust-analyzer-git`](https://aur.archlinux.org/packages/rust-analyzer-git)
+    (latest Git version)
+
+Install it with pacman, for example:
+
+    $ pacman -S rust-analyzer
+
+### Gentoo Linux
+
+`rust-analyzer` is installed when the `rust-analyzer` use flag is set for dev-lang/rust or dev-lang/rust-bin. You also need to set the `rust-src` use flag.
+
+### macOS
+
+The `rust-analyzer` binary can be installed via
+[Homebrew](https://brew.sh/).
+
+    $ brew install rust-analyzer
+
+### Windows
+
+It is recommended to install the latest Microsoft Visual C++ Redistributable prior to installation.
+Download links can be found
+[here](https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist).
+
diff --git a/src/tools/rust-analyzer/docs/book/src/vs_code.md b/src/tools/rust-analyzer/docs/book/src/vs_code.md
new file mode 100644
index 0000000000000..233b862d2c6b7
--- /dev/null
+++ b/src/tools/rust-analyzer/docs/book/src/vs_code.md
@@ -0,0 +1,121 @@
+# VS Code
+
+This is the best supported editor at the moment. The rust-analyzer
+plugin for VS Code is maintained [in
+tree](https://github.com/rust-lang/rust-analyzer/tree/master/editors/code).
+
+You can install the latest release of the plugin from [the
+marketplace](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer).
+
+Note that the plugin may cause conflicts with the [previous official
+Rust
+plugin](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust).
+The latter is no longer maintained and should be uninstalled.
+
+The server binary is stored in the extension install directory, which
+starts with `rust-lang.rust-analyzer-` and is located under:
+
+-   Linux: `~/.vscode/extensions`
+
+-   Linux (Remote, such as WSL): `~/.vscode-server/extensions`
+
+-   macOS: `~/.vscode/extensions`
+
+-   Windows: `%USERPROFILE%\.vscode\extensions`
+
+As an exception, on NixOS, the extension makes a copy of the server and
+stores it under
+`~/.config/Code/User/globalStorage/rust-lang.rust-analyzer`.
+
+Note that we only support the two most recent versions of VS Code.
+
+### Updates
+
+The extension will be updated automatically as new versions become
+available. It will ask your permission to download the matching language
+server version binary if needed.
+
+#### Nightly
+
+We ship nightly releases for VS Code. To help us out by testing the
+newest code, you can enable pre-release versions in the Code extension
+page.
+
+### Manual installation
+
+Alternatively, download a VSIX corresponding to your platform from the
+[releases](https://github.com/rust-lang/rust-analyzer/releases) page.
+
+Install the extension with the `Extensions: Install from VSIX` command
+within VS Code, or from the command line via:
+
+    $ code --install-extension /path/to/rust-analyzer.vsix
+
+If you are running an unsupported platform, you can install
+`rust-analyzer-no-server.vsix` and compile or obtain a server binary.
+Copy the server anywhere, then add the path to your settings.json, for
+example:
+
+```json
+{ "rust-analyzer.server.path": "~/.local/bin/rust-analyzer-linux" }
+```
+
+### Building From Source
+
+Both the server and the Code plugin can be installed from source:
+
+    $ git clone https://github.com/rust-lang/rust-analyzer.git && cd rust-analyzer
+    $ cargo xtask install
+
+You’ll need Cargo, nodejs (matching a supported version of VS Code) and
+npm for this.
+
+Note that installing via `xtask install` does not work for VS Code
+Remote, instead you’ll need to install the `.vsix` manually.
+
+If you’re not using Code, you can compile and install only the LSP
+server:
+
+    $ cargo xtask install --server
+
+Make sure that `.cargo/bin` is in `$PATH` and precedes paths where
+`rust-analyzer` may also be installed. Specifically, `rustup` includes a
+proxy called `rust-analyzer`, which can cause problems if you’re
+planning to use a source build or even a downloaded binary.
+
+## VS Code or VSCodium in Flatpak
+
+Setting up `rust-analyzer` with a Flatpak version of Code is not trivial
+because of the Flatpak sandbox. While the sandbox can be disabled for
+some directories, `/usr/bin` will always be mounted under
+`/run/host/usr/bin`. This prevents access to the system’s C compiler, a
+system-wide installation of Rust, or any other libraries you might want
+to link to. Some compilers and libraries can be acquired as Flatpak
+SDKs, such as `org.freedesktop.Sdk.Extension.rust-stable` or
+`org.freedesktop.Sdk.Extension.llvm15`.
+
+If you use a Flatpak SDK for Rust, it must be in your `PATH`:
+
+ * install the SDK extensions with `flatpak install org.freedesktop.Sdk.Extension.{llvm15,rust-stable}//23.08`
+ * enable SDK extensions in the editor with the environment variable `FLATPAK_ENABLE_SDK_EXT=llvm15,rust-stable` (this can be done using flatseal or `flatpak override`)
+
+If you want to use Flatpak in combination with `rustup`, the following
+steps might help:
+
+-   both Rust and `rustup` have to be installed using
+    <https://rustup.rs>. Distro packages *will not* work.
+
+-   you need to launch Code, open a terminal and run `echo $PATH`
+
+-   using
+    [Flatseal](https://flathub.org/apps/details/com.github.tchx84.Flatseal),
+    you must add an environment variable called `PATH`. Set its value to
+    the output from above, appending `:~/.cargo/bin`, where `~` is the
+    path to your home directory. You must replace `~`, as it won’t be
+    expanded otherwise.
+
+-   while Flatseal is open, you must enable access to "All user files"
+
+A C compiler should already be available via `org.freedesktop.Sdk`. Any
+other tools or libraries you will need to acquire from Flatpak.
+
diff --git a/src/tools/rust-analyzer/editors/code/package-lock.json b/src/tools/rust-analyzer/editors/code/package-lock.json
index 6027f813311c9..86a066454a5cb 100644
--- a/src/tools/rust-analyzer/editors/code/package-lock.json
+++ b/src/tools/rust-analyzer/editors/code/package-lock.json
@@ -23,7 +23,7 @@
                 "@typescript-eslint/parser": "^6.0.0",
                 "@vscode/test-electron": "^2.3.8",
                 "@vscode/vsce": "^3.0.0",
-                "esbuild": "^0.18.12",
+                "esbuild": "^0.25.0",
                 "eslint": "^8.44.0",
                 "eslint-config-prettier": "^8.8.0",
                 "ovsx": "^0.8.2",
@@ -256,356 +256,429 @@
                 "node": ">=16"
             }
         },
+        "node_modules/@esbuild/aix-ppc64": {
+            "version": "0.25.0",
+            "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.25.0.tgz",
+            "integrity": "sha512-O7vun9Sf8DFjH2UtqK8Ku3LkquL9SZL8OLY1T5NZkA34+wG3OQF7cl4Ql8vdNzM6fzBbYfLaiRLIOZ+2FOCgBQ==",
+            "cpu": [
+                "ppc64"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "aix"
+            ],
+            "engines": {
+                "node": ">=18"
+            }
+        },
         "node_modules/@esbuild/android-arm": {
-            "version": "0.18.12",
-            "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.18.12.tgz",
-            "integrity": "sha512-LIxaNIQfkFZbTLb4+cX7dozHlAbAshhFE5PKdro0l+FnCpx1GDJaQ2WMcqm+ToXKMt8p8Uojk/MFRuGyz3V5Sw==",
+            "version": "0.25.0",
+            "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.25.0.tgz",
+            "integrity": "sha512-PTyWCYYiU0+1eJKmw21lWtC+d08JDZPQ5g+kFyxP0V+es6VPPSUhM6zk8iImp2jbV6GwjX4pap0JFbUQN65X1g==",
             "cpu": [
                 "arm"
             ],
             "dev": true,
+            "license": "MIT",
             "optional": true,
             "os": [
                 "android"
             ],
             "engines": {
-                "node": ">=12"
+                "node": ">=18"
             }
         },
         "node_modules/@esbuild/android-arm64": {
-            "version": "0.18.12",
-            "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.18.12.tgz",
-            "integrity": "sha512-BMAlczRqC/LUt2P97E4apTBbkvS9JTJnp2DKFbCwpZ8vBvXVbNdqmvzW/OsdtI/+mGr+apkkpqGM8WecLkPgrA==",
+            "version": "0.25.0",
+            "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.25.0.tgz",
+            "integrity": "sha512-grvv8WncGjDSyUBjN9yHXNt+cq0snxXbDxy5pJtzMKGmmpPxeAmAhWxXI+01lU5rwZomDgD3kJwulEnhTRUd6g==",
             "cpu": [
                 "arm64"
             ],
             "dev": true,
+            "license": "MIT",
             "optional": true,
             "os": [
                 "android"
             ],
             "engines": {
-                "node": ">=12"
+                "node": ">=18"
             }
         },
         "node_modules/@esbuild/android-x64": {
-            "version": "0.18.12",
-            "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.18.12.tgz",
-            "integrity": "sha512-zU5MyluNsykf5cOJ0LZZZjgAHbhPJ1cWfdH1ZXVMXxVMhEV0VZiZXQdwBBVvmvbF28EizeK7obG9fs+fpmS0eQ==",
+            "version": "0.25.0",
+            "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.25.0.tgz",
+            "integrity": "sha512-m/ix7SfKG5buCnxasr52+LI78SQ+wgdENi9CqyCXwjVR2X4Jkz+BpC3le3AoBPYTC9NHklwngVXvbJ9/Akhrfg==",
             "cpu": [
                 "x64"
             ],
             "dev": true,
+            "license": "MIT",
             "optional": true,
             "os": [
                 "android"
             ],
             "engines": {
-                "node": ">=12"
+                "node": ">=18"
             }
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-                "@esbuild/android-arm64": "0.18.12",
-                "@esbuild/android-x64": "0.18.12",
-                "@esbuild/darwin-arm64": "0.18.12",
-                "@esbuild/darwin-x64": "0.18.12",
-                "@esbuild/freebsd-arm64": "0.18.12",
-                "@esbuild/freebsd-x64": "0.18.12",
-                "@esbuild/linux-arm": "0.18.12",
-                "@esbuild/linux-arm64": "0.18.12",
-                "@esbuild/linux-ia32": "0.18.12",
-                "@esbuild/linux-loong64": "0.18.12",
-                "@esbuild/linux-mips64el": "0.18.12",
-                "@esbuild/linux-ppc64": "0.18.12",
-                "@esbuild/linux-riscv64": "0.18.12",
-                "@esbuild/linux-s390x": "0.18.12",
-                "@esbuild/linux-x64": "0.18.12",
-                "@esbuild/netbsd-x64": "0.18.12",
-                "@esbuild/openbsd-x64": "0.18.12",
-                "@esbuild/sunos-x64": "0.18.12",
-                "@esbuild/win32-arm64": "0.18.12",
-                "@esbuild/win32-ia32": "0.18.12",
-                "@esbuild/win32-x64": "0.18.12"
+                "@esbuild/aix-ppc64": "0.25.0",
+                "@esbuild/android-arm": "0.25.0",
+                "@esbuild/android-arm64": "0.25.0",
+                "@esbuild/android-x64": "0.25.0",
+                "@esbuild/darwin-arm64": "0.25.0",
+                "@esbuild/darwin-x64": "0.25.0",
+                "@esbuild/freebsd-arm64": "0.25.0",
+                "@esbuild/freebsd-x64": "0.25.0",
+                "@esbuild/linux-arm": "0.25.0",
+                "@esbuild/linux-arm64": "0.25.0",
+                "@esbuild/linux-ia32": "0.25.0",
+                "@esbuild/linux-loong64": "0.25.0",
+                "@esbuild/linux-mips64el": "0.25.0",
+                "@esbuild/linux-ppc64": "0.25.0",
+                "@esbuild/linux-riscv64": "0.25.0",
+                "@esbuild/linux-s390x": "0.25.0",
+                "@esbuild/linux-x64": "0.25.0",
+                "@esbuild/netbsd-arm64": "0.25.0",
+                "@esbuild/netbsd-x64": "0.25.0",
+                "@esbuild/openbsd-arm64": "0.25.0",
+                "@esbuild/openbsd-x64": "0.25.0",
+                "@esbuild/sunos-x64": "0.25.0",
+                "@esbuild/win32-arm64": "0.25.0",
+                "@esbuild/win32-ia32": "0.25.0",
+                "@esbuild/win32-x64": "0.25.0"
             }
         },
         "node_modules/escalade": {
diff --git a/src/tools/rust-analyzer/editors/code/package.json b/src/tools/rust-analyzer/editors/code/package.json
index 0a60376770527..3f09033051ba3 100644
--- a/src/tools/rust-analyzer/editors/code/package.json
+++ b/src/tools/rust-analyzer/editors/code/package.json
@@ -59,7 +59,7 @@
         "@typescript-eslint/parser": "^6.0.0",
         "@vscode/test-electron": "^2.3.8",
         "@vscode/vsce": "^3.0.0",
-        "esbuild": "^0.18.12",
+        "esbuild": "^0.25.0",
         "eslint": "^8.44.0",
         "eslint-config-prettier": "^8.8.0",
         "ovsx": "^0.8.2",
@@ -1473,8 +1473,8 @@
             {
                 "title": "files",
                 "properties": {
-                    "rust-analyzer.files.excludeDirs": {
-                        "markdownDescription": "These directories will be ignored by rust-analyzer. They are\nrelative to the workspace root, and globs are not supported. You may\nalso need to add the folders to Code's `files.watcherExclude`.",
+                    "rust-analyzer.files.exclude": {
+                        "markdownDescription": "These paths (file/directories) will be ignored by rust-analyzer. They are\nrelative to the workspace root, and globs are not supported. You may\nalso need to add the folders to Code's `files.watcherExclude`.",
                         "default": [],
                         "type": "array",
                         "items": {
diff --git a/src/tools/rust-analyzer/editors/code/walkthrough-setup-tips.md b/src/tools/rust-analyzer/editors/code/walkthrough-setup-tips.md
index fda4ac80023f0..aabe0dd662bd4 100644
--- a/src/tools/rust-analyzer/editors/code/walkthrough-setup-tips.md
+++ b/src/tools/rust-analyzer/editors/code/walkthrough-setup-tips.md
@@ -5,6 +5,7 @@ Add the following to settings.json to mark Rust library sources as read-only:
 ```json
 "files.readonlyInclude": {
   "**/.cargo/registry/src/**/*.rs": true,
+  "**/.cargo/git/checkouts/**/*.rs": true,
   "**/lib/rustlib/src/rust/library/**/*.rs": true,
 },
 ```
diff --git a/src/tools/rust-analyzer/rust-version b/src/tools/rust-analyzer/rust-version
index f414893b6cdf2..4006d06e4fe3e 100644
--- a/src/tools/rust-analyzer/rust-version
+++ b/src/tools/rust-analyzer/rust-version
@@ -1 +1 @@
-d9a4a47b8b3dc0bdff83360cea2013200d60d49c
+273465e1f2932a30a5b56ac95859cdc86f3f33fa
diff --git a/src/tools/rust-analyzer/xtask/src/codegen.rs b/src/tools/rust-analyzer/xtask/src/codegen.rs
index 18f49643dc715..e84c259e9797a 100644
--- a/src/tools/rust-analyzer/xtask/src/codegen.rs
+++ b/src/tools/rust-analyzer/xtask/src/codegen.rs
@@ -117,7 +117,7 @@ impl fmt::Display for Location {
         let path = self.file.strip_prefix(project_root()).unwrap().display().to_string();
         let path = path.replace('\\', "/");
         let name = self.file.file_name().unwrap();
-        write!(f, " [{}]({}#{}) ", name.to_str().unwrap(), path, self.line)
+        write!(f, " [{}](/{}#{}) ", name.to_str().unwrap(), path, self.line)
     }
 }