Rollup of 9 pull requests

.github/ISSUE_TEMPLATE/diagnostics.md

@@ -9,7 +9,7 @@ along with any information you feel relevant to replicating the bug.
 
 If you cannot produce a minimal reproduction case (something that would work in
 isolation), please provide the steps or even link to a repository that causes
-the problematic output to occur. 
+the problematic output to occur.
 -->
 
 Given the following code: <!-- Please provide a link to play.rust-lang.org -->

README.md

@@ -21,7 +21,7 @@ Read ["Installation"] from [The Book].
 The Rust build system uses a Python script called `x.py` to build the compiler,
 which manages the bootstrapping process. It lives in the root of the project.
 
-The `x.py` command can be run directly on most systems in the following format: 
+The `x.py` command can be run directly on most systems in the following format:
 
 ```sh
 ./x.py <subcommand> [flags]

RELEASES.md

@@ -369,7 +369,7 @@ Language
 --------
 - [You can now parameterize items such as functions, traits, and `struct`s by constant
   values in addition to by types and lifetimes.][79135] Also known as "const generics"
-  E.g. you can now write the following. Note: Only values of primitive integers, 
+  E.g. you can now write the following. Note: Only values of primitive integers,
   `bool`, or `char` types are currently permitted.
   ```rust
   struct GenericArray<T, const LENGTH: usize> {

compiler/rustc_lint_defs/src/builtin.rs

@@ -3239,4 +3239,8 @@ declare_lint! {
     pub OR_PATTERNS_BACK_COMPAT,
     Allow,
     "detects usage of old versions of or-patterns",
+    @future_incompatible = FutureIncompatibleInfo {
+        reference: "issue #84869 <https://github.com/rust-lang/rust/issues/84869>",
+        edition: Some(Edition::Edition2021),
+    };
 }

config.toml.example

@@ -567,8 +567,8 @@ changelog-seen = 2
 # On Linux target, if crt-static is not enabled, 'no' means dynamic link to
 # `libgcc_s.so`, 'in-tree' means static link to the in-tree build of llvm libunwind
 # and 'system' means dynamic link to `libunwind.so`. If crt-static is enabled,
-# the behavior is depend on the libc. On musl target, 'no' and 'in-tree' both 
-# means static link to the in-tree build of llvm libunwind, and 'system' means 
+# the behavior is depend on the libc. On musl target, 'no' and 'in-tree' both
+# means static link to the in-tree build of llvm libunwind, and 'system' means
 # static link to `libunwind.a` provided by system. Due to the limitation of glibc,
 # it must link to `libgcc_eh.a` to get a working output, and this option have no effect.
 #llvm-libunwind = 'no'

library/proc_macro/src/lib.rs

@@ -766,7 +766,7 @@ impl fmt::Debug for Group {
     }
 }
 
-/// An `Punct` is an single punctuation character like `+`, `-` or `#`.
+/// A `Punct` is a single punctuation character such as `+`, `-` or `#`.
 ///
 /// Multi-character operators like `+=` are represented as two instances of `Punct` with different
 /// forms of `Spacing` returned.
@@ -779,16 +779,19 @@ impl !Send for Punct {}
 #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
 impl !Sync for Punct {}
 
-/// Whether an `Punct` is followed immediately by another `Punct` or
-/// followed by another token or whitespace.
+/// Describes whether a `Punct` is followed immediately by another `Punct` ([`Spacing::Joint`]) or
+/// by a different token or whitespace ([`Spacing::Alone`]).
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
 pub enum Spacing {
-    /// e.g., `+` is `Alone` in `+ =`, `+ident` or `+()`.
+    /// A `Punct` is not immediately followed by another `Punct`.
+    /// E.g. `+` is `Alone` in `+ =`, `+ident` and `+()`.
     #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
     Alone,
-    /// e.g., `+` is `Joint` in `+=` or `'#`.
-    /// Additionally, single quote `'` can join with identifiers to form lifetimes `'ident`.
+    /// A `Punct` is immediately followed by another `Punct`.
+    /// E.g. `+` is `Joint` in `+=` and `++`.
+    ///
+    /// Additionally, single quote `'` can join with identifiers to form lifetimes: `'ident`.
     #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
     Joint,
 }

src/ci/init_repo.sh

@@ -31,7 +31,7 @@ mkdir "$CACHE_DIR"
 
 # On the beta channel we'll be automatically calculating the prerelease version
 # via the git history, so unshallow our shallow clone from CI.
-if grep -q RUST_RELEASE_CHANNEL=beta src/ci/run.sh; then
+if [ "$(releaseChannel)" = "beta" ]; then
   git fetch origin --unshallow beta master
 fi
 

src/ci/run.sh

@@ -65,11 +65,7 @@ fi
 # Always set the release channel for bootstrap; this is normally not important (i.e., only dist
 # builds would seem to matter) but in practice bootstrap wants to know whether we're targeting
 # master, beta, or stable with a build to determine whether to run some checks (notably toolstate).
-if [[ -z "${RUST_CI_OVERRIDE_RELEASE_CHANNEL+x}" ]]; then
-    export RUST_RELEASE_CHANNEL="$(cat "${ci_dir}/channel")"
-else
-    export RUST_RELEASE_CHANNEL="${RUST_CI_OVERRIDE_RELEASE_CHANNEL}"
-fi
+export RUST_RELEASE_CHANNEL=$(releaseChannel)
 RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --release-channel=$RUST_RELEASE_CHANNEL"
 
 if [ "$DEPLOY$DEPLOY_ALT" = "1" ]; then

src/ci/shared.sh

@@ -141,3 +141,11 @@ function ciCommandSetEnv {
         exit 1
     fi
 }
+
+function releaseChannel {
+    if [[ -z "${RUST_CI_OVERRIDE_RELEASE_CHANNEL+x}" ]]; then
+        cat "${ci_dir}/channel"
+    else
+        echo $RUST_CI_OVERRIDE_RELEASE_CHANNEL
+    fi
+}

src/doc/rust.css

@@ -1,45 +1,68 @@
+/* See FiraSans-LICENSE.txt for the Fira Sans license. */
 @font-face {
 	font-family: 'Fira Sans';
 	font-style: normal;
 	font-weight: 400;
-	src: local('Fira Sans'), url("FiraSans-Regular.woff") format('woff');
+	src: local('Fira Sans'),
+		url("FiraSans-Regular.woff2") format("woff2"),
+		url("FiraSans-Regular.woff") format('woff');
 	font-display: swap;
 }
 @font-face {
 	font-family: 'Fira Sans';
 	font-style: normal;
 	font-weight: 500;
-	src: local('Fira Sans Medium'), url("FiraSans-Medium.woff") format('woff');
+	src: local('Fira Sans Medium'),
+		url("FiraSans-Medium.woff2") format("woff2"),
+		url("FiraSans-Medium.woff") format('woff');
 	font-display: swap;
 }
+
+/* See SourceSerif4-LICENSE.md for the Source Serif 4 license. */
 @font-face {
-	font-family: 'Source Serif Pro';
+	font-family: 'Source Serif 4';
 	font-style: normal;
 	font-weight: 400;
-	src: local('Source Serif Pro'), url("SourceSerifPro-Regular.ttf.woff") format('woff');
+	src: local('Source Serif 4'), url("SourceSerif4-Regular.ttf.woff") format('woff');
 	font-display: swap;
 }
 @font-face {
-	font-family: 'Source Serif Pro';
+	font-family: 'Source Serif 4';
 	font-style: italic;
 	font-weight: 400;
-	src: url("SourceSerifPro-It.ttf.woff") format('woff');
+	src: local('Source Serif 4 Italic'), url("SourceSerif4-It.ttf.woff") format('woff');
 	font-display: swap;
 }
 @font-face {
-	font-family: 'Source Serif Pro';
+	font-family: 'Source Serif 4';
 	font-style: normal;
 	font-weight: 700;
-	src: local('Source Serif Pro Bold'), url("SourceSerifPro-Bold.ttf.woff") format('woff');
+	src: local('Source Serif 4 Bold'), url("SourceSerif4-Bold.ttf.woff") format('woff');
 	font-display: swap;
 }
+
+/* See SourceCodePro-LICENSE.txt for the Source Code Pro license. */
 @font-face {
 	font-family: 'Source Code Pro';
 	font-style: normal;
 	font-weight: 400;
 	/* Avoid using locally installed font because bad versions are in circulation:
 	 * see https://github.com/rust-lang/rust/issues/24355 */
-	src: url("SourceCodePro-Regular.woff") format('woff');
+	src: url("SourceCodePro-Regular.ttf.woff") format('woff');
+	font-display: swap;
+}
+@font-face {
+	font-family: 'Source Code Pro';
+	font-style: italic;
+	font-weight: 400;
+	src: url("SourceCodePro-It.ttf.woff") format('woff');
+	font-display: swap;
+}
+@font-face {
+	font-family: 'Source Code Pro';
+	font-style: normal;
+	font-weight: 600;
+	src: url("SourceCodePro-Semibold.ttf.woff") format('woff');
 	font-display: swap;
 }
 
@@ -55,7 +78,7 @@ body {
 	background-color: white;
 	margin: 0 auto;
 	padding: 0 15px;
-	font-family: "Source Serif Pro", Georgia, Times, "Times New Roman", serif;
+	font-family: "Source Serif 4", Georgia, Times, "Times New Roman", serif;
 	font-size: 18px;
 	color: #333;
 	line-height: 1.428571429;

src/librustdoc/html/format.rs

@@ -9,6 +9,7 @@ use std::cell::Cell;
 use std::fmt;
 use std::iter;
 
+use rustc_attr::{ConstStability, StabilityLevel};
 use rustc_data_structures::captures::Captures;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
@@ -1253,15 +1254,6 @@ impl PrintWithSpace for hir::Unsafety {
     }
 }
 
-impl PrintWithSpace for hir::Constness {
-    fn print_with_space(&self) -> &str {
-        match self {
-            hir::Constness::Const => "const ",
-            hir::Constness::NotConst => "",
-        }
-    }
-}
-
 impl PrintWithSpace for hir::IsAsync {
     fn print_with_space(&self) -> &str {
         match self {
@@ -1280,6 +1272,22 @@ impl PrintWithSpace for hir::Mutability {
     }
 }
 
+crate fn print_constness_with_space(
+    c: &hir::Constness,
+    s: Option<&ConstStability>,
+) -> &'static str {
+    match (c, s) {
+        // const stable or when feature(staged_api) is not set
+        (
+            hir::Constness::Const,
+            Some(ConstStability { level: StabilityLevel::Stable { .. }, .. }),
+        )
+        | (hir::Constness::Const, None) => "const ",
+        // const unstable or not const
+        _ => "",
+    }
+}
+
 impl clean::Import {
     crate fn print<'a, 'tcx: 'a>(
         &'a self,

src/librustdoc/html/render/mod.rs

@@ -42,7 +42,7 @@ use std::str;
 use std::string::ToString;
 
 use rustc_ast_pretty::pprust;
-use rustc_attr::{Deprecation, StabilityLevel};
+use rustc_attr::{ConstStability, Deprecation, StabilityLevel};
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
 use rustc_hir::def::CtorKind;
@@ -61,8 +61,8 @@ use crate::formats::item_type::ItemType;
 use crate::formats::{AssocItemRender, Impl, RenderMode};
 use crate::html::escape::Escape;
 use crate::html::format::{
-    href, print_abi_with_space, print_default_space, print_generic_bounds, print_where_clause,
-    Buffer, PrintWithSpace,
+    href, print_abi_with_space, print_constness_with_space, print_default_space,
+    print_generic_bounds, print_where_clause, Buffer, PrintWithSpace,
 };
 use crate::html::markdown::{Markdown, MarkdownHtml, MarkdownSummaryLine};
 
@@ -826,21 +826,45 @@ fn assoc_type(
 fn render_stability_since_raw(
     w: &mut Buffer,
     ver: Option<&str>,
-    const_ver: Option<&str>,
+    const_stability: Option<&ConstStability>,
     containing_ver: Option<&str>,
     containing_const_ver: Option<&str>,
 ) {
     let ver = ver.filter(|inner| !inner.is_empty());
-    let const_ver = const_ver.filter(|inner| !inner.is_empty());
 
-    match (ver, const_ver) {
-        (Some(v), Some(cv)) if const_ver != containing_const_ver => {
+    match (ver, const_stability) {
+        // stable and const stable
+        (Some(v), Some(ConstStability { level: StabilityLevel::Stable { since }, .. }))
+            if Some(since.as_str()).as_deref() != containing_const_ver =>
+        {
             write!(
                 w,
                 "<span class=\"since\" title=\"Stable since Rust version {0}, const since {1}\">{0} (const: {1})</span>",
-                v, cv
+                v, since
             );
         }
+        // stable and const unstable
+        (
+            Some(v),
+            Some(ConstStability { level: StabilityLevel::Unstable { issue, .. }, feature, .. }),
+        ) => {
+            write!(
+                w,
+                "<span class=\"since\" title=\"Stable since Rust version {0}, const unstable\">{0} (const: ",
+                v
+            );
+            if let Some(n) = issue {
+                write!(
+                    w,
+                    "<a href=\"https://github.com/rust-lang/rust/issues/{}\" title=\"Tracking issue for {}\">unstable</a>",
+                    n, feature
+                );
+            } else {
+                write!(w, "unstable");
+            }
+            write!(w, ")</span>");
+        }
+        // stable
         (Some(v), _) if ver != containing_ver => {
             write!(
                 w,
@@ -888,11 +912,13 @@ fn render_assoc_item(
             }
         };
         let vis = meth.visibility.print_with_space(meth.def_id, cx).to_string();
-        let constness = header.constness.print_with_space();
+        let constness =
+            print_constness_with_space(&header.constness, meth.const_stability(cx.tcx()));
         let asyncness = header.asyncness.print_with_space();
         let unsafety = header.unsafety.print_with_space();
         let defaultness = print_default_space(meth.is_default());
         let abi = print_abi_with_space(header.abi).to_string();
+
         // NOTE: `{:#}` does not print HTML formatting, `{}` does. So `g.print` can't be reused between the length calculation and `write!`.
         let generics_len = format!("{:#}", g.print(cx)).len();
         let mut header_len = "fn ".len()
@@ -917,15 +943,15 @@ fn render_assoc_item(
         w.reserve(header_len + "<a href=\"\" class=\"fnname\">{".len() + "</a>".len());
         write!(
             w,
-            "{}{}{}{}{}{}{}fn <a href=\"{href}\" class=\"fnname\">{name}</a>\
+            "{indent}{vis}{constness}{asyncness}{unsafety}{defaultness}{abi}fn <a href=\"{href}\" class=\"fnname\">{name}</a>\
              {generics}{decl}{notable_traits}{where_clause}",
-            indent_str,
-            vis,
-            constness,
-            asyncness,
-            unsafety,
-            defaultness,
-            abi,
+            indent = indent_str,
+            vis = vis,
+            constness = constness,
+            asyncness = asyncness,
+            unsafety = unsafety,
+            defaultness = defaultness,
+            abi = abi,
             href = href,
             name = name,
             generics = g.print(cx),
@@ -1583,7 +1609,7 @@ fn render_rightside(
     render_stability_since_raw(
         w,
         item.stable_since(tcx).as_deref(),
-        item.const_stable_since(tcx).as_deref(),
+        item.const_stability(tcx),
         containing_item.stable_since(tcx).as_deref(),
         containing_item.const_stable_since(tcx).as_deref(),
     );