Auto merge of #99756 - fasterthanlime:ra-sync-and-pms-component, r=Ma…

…rk-Simulacrum

Sync `rust-analyzer`, add `rust-analyzer-proc-macro-srv` binary to Rustc component

As discussed earlier with `@jyn514` and `@pietroalbini,` I'm also going to use this PR to have `dist::Rustc` build the `rust-analyzer-proc-macro-srv` binary introduced in:

  * rust-lang#12871

crates/hir-def/src/body/lower.rs

@@ -96,6 +96,7 @@ pub(super) fn lower(
         expander,
         name_to_pat_grouping: Default::default(),
         is_lowering_inside_or_pat: false,
+        is_lowering_assignee_expr: false,
     }
     .collect(params, body)
 }
@@ -109,6 +110,7 @@ struct ExprCollector<'a> {
     // a poor-mans union-find?
     name_to_pat_grouping: FxHashMap<Name, Vec<PatId>>,
     is_lowering_inside_or_pat: bool,
+    is_lowering_assignee_expr: bool,
 }
 
 impl ExprCollector<'_> {
@@ -283,7 +285,10 @@ impl ExprCollector<'_> {
                 } else {
                     Box::default()
                 };
-                self.alloc_expr(Expr::Call { callee, args }, syntax_ptr)
+                self.alloc_expr(
+                    Expr::Call { callee, args, is_assignee_expr: self.is_lowering_assignee_expr },
+                    syntax_ptr,
+                )
             }
             ast::Expr::MethodCallExpr(e) => {
                 let receiver = self.collect_expr_opt(e.receiver());
@@ -359,6 +364,7 @@ impl ExprCollector<'_> {
             ast::Expr::RecordExpr(e) => {
                 let path =
                     e.path().and_then(|path| self.expander.parse_path(self.db, path)).map(Box::new);
+                let is_assignee_expr = self.is_lowering_assignee_expr;
                 let record_lit = if let Some(nfl) = e.record_expr_field_list() {
                     let fields = nfl
                         .fields()
@@ -378,9 +384,16 @@ impl ExprCollector<'_> {
                         })
                         .collect();
                     let spread = nfl.spread().map(|s| self.collect_expr(s));
-                    Expr::RecordLit { path, fields, spread }
+                    let ellipsis = nfl.dotdot_token().is_some();
+                    Expr::RecordLit { path, fields, spread, ellipsis, is_assignee_expr }
                 } else {
-                    Expr::RecordLit { path, fields: Box::default(), spread: None }
+                    Expr::RecordLit {
+                        path,
+                        fields: Box::default(),
+                        spread: None,
+                        ellipsis: false,
+                        is_assignee_expr,
+                    }
                 };
 
                 self.alloc_expr(record_lit, syntax_ptr)
@@ -458,14 +471,21 @@ impl ExprCollector<'_> {
                 )
             }
             ast::Expr::BinExpr(e) => {
+                let op = e.op_kind();
+                if let Some(ast::BinaryOp::Assignment { op: None }) = op {
+                    self.is_lowering_assignee_expr = true;
+                }
                 let lhs = self.collect_expr_opt(e.lhs());
+                self.is_lowering_assignee_expr = false;
                 let rhs = self.collect_expr_opt(e.rhs());
-                let op = e.op_kind();
                 self.alloc_expr(Expr::BinaryOp { lhs, rhs, op }, syntax_ptr)
             }
             ast::Expr::TupleExpr(e) => {
                 let exprs = e.fields().map(|expr| self.collect_expr(expr)).collect();
-                self.alloc_expr(Expr::Tuple { exprs }, syntax_ptr)
+                self.alloc_expr(
+                    Expr::Tuple { exprs, is_assignee_expr: self.is_lowering_assignee_expr },
+                    syntax_ptr,
+                )
             }
             ast::Expr::BoxExpr(e) => {
                 let expr = self.collect_expr_opt(e.expr());
@@ -477,8 +497,14 @@ impl ExprCollector<'_> {
 
                 match kind {
                     ArrayExprKind::ElementList(e) => {
-                        let exprs = e.map(|expr| self.collect_expr(expr)).collect();
-                        self.alloc_expr(Expr::Array(Array::ElementList(exprs)), syntax_ptr)
+                        let elements = e.map(|expr| self.collect_expr(expr)).collect();
+                        self.alloc_expr(
+                            Expr::Array(Array::ElementList {
+                                elements,
+                                is_assignee_expr: self.is_lowering_assignee_expr,
+                            }),
+                            syntax_ptr,
+                        )
                     }
                     ArrayExprKind::Repeat { initializer, repeat } => {
                         let initializer = self.collect_expr_opt(initializer);

crates/hir-def/src/data.rs

@@ -12,7 +12,7 @@ use crate::{
     db::DefDatabase,
     intern::Interned,
     item_tree::{self, AssocItem, FnFlags, ItemTree, ItemTreeId, ModItem, Param, TreeId},
-    nameres::{attr_resolution::ResolvedAttr, DefMap},
+    nameres::{attr_resolution::ResolvedAttr, proc_macro::ProcMacroKind, DefMap},
     type_ref::{TraitRef, TypeBound, TypeRef},
     visibility::RawVisibility,
     AssocItemId, AstIdWithPath, ConstId, ConstLoc, FunctionId, FunctionLoc, HasModule, ImplId,
@@ -348,7 +348,8 @@ impl MacroRulesData {
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct ProcMacroData {
     pub name: Name,
-    // FIXME: Record deriver helper here?
+    /// Derive helpers, if this is a derive
+    pub helpers: Option<Box<[Name]>>,
 }
 
 impl ProcMacroData {
@@ -360,17 +361,23 @@ impl ProcMacroData {
         let item_tree = loc.id.item_tree(db);
         let makro = &item_tree[loc.id.value];
 
-        let name = if let Some(def) = item_tree
+        let (name, helpers) = if let Some(def) = item_tree
             .attrs(db, loc.container.krate(), ModItem::from(loc.id.value).into())
             .parse_proc_macro_decl(&makro.name)
         {
-            def.name
+            (
+                def.name,
+                match def.kind {
+                    ProcMacroKind::CustomDerive { helpers } => Some(helpers),
+                    ProcMacroKind::FnLike | ProcMacroKind::Attr => None,
+                },
+            )
         } else {
             // eeeh...
             stdx::never!("proc macro declaration is not a proc macro");
-            makro.name.clone()
+            (makro.name.clone(), None)
         };
-        Arc::new(ProcMacroData { name })
+        Arc::new(ProcMacroData { name, helpers })
     }
 }
 

crates/hir-def/src/expr.rs

@@ -110,6 +110,7 @@ pub enum Expr {
     Call {
         callee: ExprId,
         args: Box<[ExprId]>,
+        is_assignee_expr: bool,
     },
     MethodCall {
         receiver: ExprId,
@@ -138,6 +139,8 @@ pub enum Expr {
         path: Option<Box<Path>>,
         fields: Box<[RecordLitField]>,
         spread: Option<ExprId>,
+        ellipsis: bool,
+        is_assignee_expr: bool,
     },
     Field {
         expr: ExprId,
@@ -196,6 +199,7 @@ pub enum Expr {
     },
     Tuple {
         exprs: Box<[ExprId]>,
+        is_assignee_expr: bool,
     },
     Unsafe {
         body: ExprId,
@@ -211,7 +215,7 @@ pub enum Expr {
 
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub enum Array {
-    ElementList(Box<[ExprId]>),
+    ElementList { elements: Box<[ExprId]>, is_assignee_expr: bool },
     Repeat { initializer: ExprId, repeat: ExprId },
 }
 
@@ -285,7 +289,7 @@ impl Expr {
                 f(*iterable);
                 f(*body);
             }
-            Expr::Call { callee, args } => {
+            Expr::Call { callee, args, .. } => {
                 f(*callee);
                 args.iter().copied().for_each(f);
             }
@@ -339,9 +343,9 @@ impl Expr {
             | Expr::Box { expr } => {
                 f(*expr);
             }
-            Expr::Tuple { exprs } => exprs.iter().copied().for_each(f),
+            Expr::Tuple { exprs, .. } => exprs.iter().copied().for_each(f),
             Expr::Array(a) => match a {
-                Array::ElementList(exprs) => exprs.iter().copied().for_each(f),
+                Array::ElementList { elements, .. } => elements.iter().copied().for_each(f),
                 Array::Repeat { initializer, repeat } => {
                     f(*initializer);
                     f(*repeat)

crates/hir-def/src/item_scope.rs

@@ -66,10 +66,14 @@ pub struct ItemScope {
     attr_macros: FxHashMap<AstId<ast::Item>, MacroCallId>,
     /// The derive macro invocations in this scope, keyed by the owner item over the actual derive attributes
     /// paired with the derive macro invocations for the specific attribute.
-    derive_macros: FxHashMap<
-        AstId<ast::Adt>,
-        SmallVec<[(AttrId, MacroCallId, SmallVec<[Option<MacroCallId>; 1]>); 1]>,
-    >,
+    derive_macros: FxHashMap<AstId<ast::Adt>, SmallVec<[DeriveMacroInvocation; 1]>>,
+}
+
+#[derive(Debug, PartialEq, Eq)]
+struct DeriveMacroInvocation {
+    attr_id: AttrId,
+    attr_call_id: MacroCallId,
+    derive_call_ids: SmallVec<[Option<MacroCallId>; 1]>,
 }
 
 pub(crate) static BUILTIN_SCOPE: Lazy<FxHashMap<Name, PerNs>> = Lazy::new(|| {
@@ -210,12 +214,14 @@ impl ItemScope {
         &mut self,
         adt: AstId<ast::Adt>,
         call: MacroCallId,
-        attr_id: AttrId,
+        id: AttrId,
         idx: usize,
     ) {
         if let Some(derives) = self.derive_macros.get_mut(&adt) {
-            if let Some((.., invocs)) = derives.iter_mut().find(|&&mut (id, ..)| id == attr_id) {
-                invocs[idx] = Some(call);
+            if let Some(DeriveMacroInvocation { derive_call_ids, .. }) =
+                derives.iter_mut().find(|&&mut DeriveMacroInvocation { attr_id, .. }| id == attr_id)
+            {
+                derive_call_ids[idx] = Some(call);
             }
         }
     }
@@ -227,10 +233,14 @@ impl ItemScope {
         &mut self,
         adt: AstId<ast::Adt>,
         attr_id: AttrId,
-        call_id: MacroCallId,
+        attr_call_id: MacroCallId,
         len: usize,
     ) {
-        self.derive_macros.entry(adt).or_default().push((attr_id, call_id, smallvec![None; len]));
+        self.derive_macros.entry(adt).or_default().push(DeriveMacroInvocation {
+            attr_id,
+            attr_call_id,
+            derive_call_ids: smallvec![None; len],
+        });
     }
 
     pub(crate) fn derive_macro_invocs(
@@ -242,7 +252,12 @@ impl ItemScope {
         ),
     > + '_ {
         self.derive_macros.iter().map(|(k, v)| {
-            (*k, v.iter().map(|&(attr_id, call_id, ref invocs)| (attr_id, call_id, &**invocs)))
+            (
+                *k,
+                v.iter().map(|DeriveMacroInvocation { attr_id, attr_call_id, derive_call_ids }| {
+                    (*attr_id, *attr_call_id, &**derive_call_ids)
+                }),
+            )
         })
     }
 

crates/hir-def/src/lib.rs

@@ -934,11 +934,11 @@ fn derive_macro_as_call_id(
     derive_attr: AttrId,
     derive_pos: u32,
     krate: CrateId,
-    resolver: impl Fn(path::ModPath) -> Option<MacroDefId>,
-) -> Result<MacroCallId, UnresolvedMacro> {
-    let def: MacroDefId = resolver(item_attr.path.clone())
+    resolver: impl Fn(path::ModPath) -> Option<(MacroId, MacroDefId)>,
+) -> Result<(MacroId, MacroDefId, MacroCallId), UnresolvedMacro> {
+    let (macro_id, def_id) = resolver(item_attr.path.clone())
         .ok_or_else(|| UnresolvedMacro { path: item_attr.path.clone() })?;
-    let res = def.as_lazy_macro(
+    let call_id = def_id.as_lazy_macro(
         db.upcast(),
         krate,
         MacroCallKind::Derive {
@@ -947,7 +947,7 @@ fn derive_macro_as_call_id(
             derive_attr_index: derive_attr.ast_index,
         },
     );
-    Ok(res)
+    Ok((macro_id, def_id, call_id))
 }
 
 fn attr_macro_as_call_id(