Merge branch 'master' into document_rustdoc_json_types

Cargo.lock

@@ -3141,7 +3141,19 @@ dependencies = [
  "bitflags 2.5.0",
  "getopts",
  "memchr",
- "pulldown-cmark-escape",
+ "pulldown-cmark-escape 0.10.1",
+ "unicase",
+]
+
+[[package]]
+name = "pulldown-cmark"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8746739f11d39ce5ad5c2520a9b75285310dbfe78c541ccf832d38615765aec0"
+dependencies = [
+ "bitflags 2.5.0",
+ "memchr",
+ "pulldown-cmark-escape 0.11.0",
  "unicase",
 ]
 
@@ -3151,6 +3163,12 @@ version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bd348ff538bc9caeda7ee8cad2d1d48236a1f443c1fa3913c6a02fe0043b1dd3"
 
+[[package]]
+name = "pulldown-cmark-escape"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "007d8adb5ddab6f8e3f491ac63566a7d5002cc7ed73901f72057943fa71ae1ae"
+
 [[package]]
 name = "pulldown-cmark-to-cmark"
 version = "13.0.0"
@@ -4152,6 +4170,7 @@ dependencies = [
  "rustc_middle",
  "rustc_span",
  "rustc_target",
+ "rustc_type_ir",
  "smallvec",
  "tracing",
 ]
@@ -4604,7 +4623,7 @@ name = "rustc_resolve"
 version = "0.0.0"
 dependencies = [
  "bitflags 2.5.0",
- "pulldown-cmark 0.9.6",
+ "pulldown-cmark 0.11.0",
  "rustc_arena",
  "rustc_ast",
  "rustc_ast_pretty",
@@ -4883,6 +4902,7 @@ dependencies = [
  "indexmap",
  "itertools",
  "minifier",
+ "pulldown-cmark 0.9.6",
  "regex",
  "rustdoc-json-types",
  "serde",
@@ -6337,9 +6357,9 @@ dependencies = [
 
 [[package]]
 name = "windows-bindgen"
-version = "0.57.0"
+version = "0.58.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ccb96113d6277ba543c0f77e1c5494af8094bf9daf9b85acdc3f1b620e7c7b4"
+checksum = "91cd28d93c692351f3a6e5615567c56756e330bee1c99c6bdd57bfc5ab15f589"
 dependencies = [
  "proc-macro2",
  "rayon",
@@ -6360,9 +6380,9 @@ dependencies = [
 
 [[package]]
 name = "windows-metadata"
-version = "0.57.0"
+version = "0.58.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8308d076825b9d9e5abc64f8113e96d02b2aeeba869b20fdd65c7e70cda13dfc"
+checksum = "2e837f3c3012cfe9e7086302a93f441a7999439be1ad4c530d55d2f6d2921809"
 
 [[package]]
 name = "windows-sys"

compiler/rustc_abi/src/layout.rs

@@ -186,7 +186,7 @@ pub trait LayoutCalculator {
         let (present_first, present_second) = {
             let mut present_variants = variants
                 .iter_enumerated()
-                .filter_map(|(i, v)| if absent(v) { None } else { Some(i) });
+                .filter_map(|(i, v)| if !repr.c() && absent(v) { None } else { Some(i) });
             (present_variants.next(), present_variants.next())
         };
         let present_first = match present_first {
@@ -621,7 +621,7 @@ where
     let discr_type = repr.discr_type();
     let bits = Integer::from_attr(dl, discr_type).size().bits();
     for (i, mut val) in discriminants {
-        if variants[i].iter().any(|f| f.abi.is_uninhabited()) {
+        if !repr.c() && variants[i].iter().any(|f| f.abi.is_uninhabited()) {
             continue;
         }
         if discr_type.is_signed() {

compiler/rustc_abi/src/lib.rs

@@ -1429,7 +1429,7 @@ pub enum Variants<FieldIdx: Idx, VariantIdx: Idx> {
     /// Single enum variants, structs/tuples, unions, and all non-ADTs.
     Single { index: VariantIdx },
 
-    /// Enum-likes with more than one inhabited variant: each variant comes with
+    /// Enum-likes with more than one variant: each variant comes with
     /// a *discriminant* (usually the same as the variant index but the user can
     /// assign explicit discriminant values). That discriminant is encoded
     /// as a *tag* on the machine. The layout of each variant is

compiler/rustc_ast/src/ast.rs

@@ -176,6 +176,8 @@ pub enum GenericArgs {
     AngleBracketed(AngleBracketedArgs),
     /// The `(A, B)` and `C` in `Foo(A, B) -> C`.
     Parenthesized(ParenthesizedArgs),
+    /// `(..)` in return type notation.
+    ParenthesizedElided(Span),
 }
 
 impl GenericArgs {
@@ -187,18 +189,19 @@ impl GenericArgs {
         match self {
             AngleBracketed(data) => data.span,
             Parenthesized(data) => data.span,
+            ParenthesizedElided(span) => *span,
         }
     }
 }
 
 /// Concrete argument in the sequence of generic args.
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub enum GenericArg {
-    /// `'a` in `Foo<'a>`
+    /// `'a` in `Foo<'a>`.
     Lifetime(Lifetime),
-    /// `Bar` in `Foo<Bar>`
+    /// `Bar` in `Foo<Bar>`.
     Type(P<Ty>),
-    /// `1` in `Foo<1>`
+    /// `1` in `Foo<1>`.
     Const(AnonConst),
 }
 
@@ -352,7 +355,7 @@ pub enum GenericParamKind {
         ty: P<Ty>,
         /// Span of the `const` keyword.
         kw_span: Span,
-        /// Optional default value for the const generic param
+        /// Optional default value for the const generic param.
         default: Option<AnonConst>,
     },
 }
@@ -711,6 +714,7 @@ pub enum ByRef {
 }
 
 impl ByRef {
+    #[must_use]
     pub fn cap_ref_mutability(mut self, mutbl: Mutability) -> Self {
         if let ByRef::Yes(old_mutbl) = &mut self {
             *old_mutbl = cmp::min(*old_mutbl, mutbl);
@@ -829,7 +833,7 @@ pub enum PatKind {
     /// only one rest pattern may occur in the pattern sequences.
     Rest,
 
-    // A never pattern `!`
+    // A never pattern `!`.
     Never,
 
     /// Parentheses in patterns used for grouping (i.e., `(PAT)`).
@@ -1118,9 +1122,9 @@ impl LocalKind {
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub struct Arm {
     pub attrs: AttrVec,
-    /// Match arm pattern, e.g. `10` in `match foo { 10 => {}, _ => {} }`
+    /// Match arm pattern, e.g. `10` in `match foo { 10 => {}, _ => {} }`.
     pub pat: P<Pat>,
-    /// Match arm guard, e.g. `n > 10` in `match foo { n if n > 10 => {}, _ => {} }`
+    /// Match arm guard, e.g. `n > 10` in `match foo { n if n > 10 => {}, _ => {} }`.
     pub guard: Option<P<Expr>>,
     /// Match arm body. Omitted if the pattern is a never pattern.
     pub body: Option<P<Expr>>,
@@ -1351,12 +1355,12 @@ pub struct Closure {
     pub fn_arg_span: Span,
 }
 
-/// Limit types of a range (inclusive or exclusive)
+/// Limit types of a range (inclusive or exclusive).
 #[derive(Copy, Clone, PartialEq, Encodable, Decodable, Debug)]
 pub enum RangeLimits {
-    /// Inclusive at the beginning, exclusive at the end
+    /// Inclusive at the beginning, exclusive at the end.
     HalfOpen,
-    /// Inclusive at the beginning and end
+    /// Inclusive at the beginning and end.
     Closed,
 }
 
@@ -1397,9 +1401,9 @@ pub struct StructExpr {
 pub enum ExprKind {
     /// An array (e.g, `[a, b, c, d]`).
     Array(ThinVec<P<Expr>>),
-    /// Allow anonymous constants from an inline `const` block
+    /// Allow anonymous constants from an inline `const` block.
     ConstBlock(AnonConst),
-    /// A function call
+    /// A function call.
     ///
     /// The first field resolves to the function itself,
     /// and the second field is the list of arguments.
@@ -1453,7 +1457,7 @@ pub enum ExprKind {
     /// A block (`'label: { ... }`).
     Block(P<Block>, Option<Label>),
     /// An `async` block (`async move { ... }`),
-    /// or a `gen` block (`gen move { ... }`)
+    /// or a `gen` block (`gen move { ... }`).
     ///
     /// The span is the "decl", which is the header before the body `{ }`
     /// including the `asyng`/`gen` keywords and possibly `move`.
@@ -2051,7 +2055,7 @@ impl UintTy {
 /// * the `A: Bound` in `Trait<A: Bound>`
 /// * the `RetTy` in `Trait(ArgTy, ArgTy) -> RetTy`
 /// * the `C = { Ct }` in `Trait<C = { Ct }>` (feature `associated_const_equality`)
-/// * the `f(): Bound` in `Trait<f(): Bound>` (feature `return_type_notation`)
+/// * the `f(..): Bound` in `Trait<f(..): Bound>` (feature `return_type_notation`)
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub struct AssocItemConstraint {
     pub id: NodeId,
@@ -2153,9 +2157,9 @@ pub enum TyKind {
     Never,
     /// A tuple (`(A, B, C, D,...)`).
     Tup(ThinVec<P<Ty>>),
-    /// An anonymous struct type i.e. `struct { foo: Type }`
+    /// An anonymous struct type i.e. `struct { foo: Type }`.
     AnonStruct(NodeId, ThinVec<FieldDef>),
-    /// An anonymous union type i.e. `union { bar: Type }`
+    /// An anonymous union type i.e. `union { bar: Type }`.
     AnonUnion(NodeId, ThinVec<FieldDef>),
     /// A path (`module::module::...::Type`), optionally
     /// "qualified", e.g., `<Vec<T> as SomeTrait>::SomeType`.
@@ -2229,9 +2233,9 @@ pub enum TraitObjectSyntax {
 
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub enum PreciseCapturingArg {
-    /// Lifetime parameter
+    /// Lifetime parameter.
     Lifetime(Lifetime),
-    /// Type or const parameter
+    /// Type or const parameter.
     Arg(Path, NodeId),
 }
 
@@ -2525,11 +2529,11 @@ pub enum Safety {
 /// Iterator`.
 #[derive(Copy, Clone, Encodable, Decodable, Debug)]
 pub enum CoroutineKind {
-    /// `async`, which returns an `impl Future`
+    /// `async`, which returns an `impl Future`.
     Async { span: Span, closure_id: NodeId, return_impl_trait_id: NodeId },
-    /// `gen`, which returns an `impl Iterator`
+    /// `gen`, which returns an `impl Iterator`.
     Gen { span: Span, closure_id: NodeId, return_impl_trait_id: NodeId },
-    /// `async gen`, which returns an `impl AsyncIterator`
+    /// `async gen`, which returns an `impl AsyncIterator`.
     AsyncGen { span: Span, closure_id: NodeId, return_impl_trait_id: NodeId },
 }
 
@@ -2746,7 +2750,7 @@ pub struct Variant {
     pub data: VariantData,
     /// Explicit discriminant, e.g., `Foo = 1`.
     pub disr_expr: Option<AnonConst>,
-    /// Is a macro placeholder
+    /// Is a macro placeholder.
     pub is_placeholder: bool,
 }
 
@@ -3020,19 +3024,19 @@ impl Item {
 /// `extern` qualifier on a function item or function type.
 #[derive(Clone, Copy, Encodable, Decodable, Debug)]
 pub enum Extern {
-    /// No explicit extern keyword was used
+    /// No explicit extern keyword was used.
     ///
-    /// E.g. `fn foo() {}`
+    /// E.g. `fn foo() {}`.
     None,
-    /// An explicit extern keyword was used, but with implicit ABI
+    /// An explicit extern keyword was used, but with implicit ABI.
     ///
-    /// E.g. `extern fn foo() {}`
+    /// E.g. `extern fn foo() {}`.
     ///
-    /// This is just `extern "C"` (see `rustc_target::spec::abi::Abi::FALLBACK`)
+    /// This is just `extern "C"` (see `rustc_target::spec::abi::Abi::FALLBACK`).
     Implicit(Span),
-    /// An explicit extern keyword was used with an explicit ABI
+    /// An explicit extern keyword was used with an explicit ABI.
     ///
-    /// E.g. `extern "C" fn foo() {}`
+    /// E.g. `extern "C" fn foo() {}`.
     Explicit(StrLit, Span),
 }
 
@@ -3051,13 +3055,13 @@ impl Extern {
 /// included in this struct (e.g., `async unsafe fn` or `const extern "C" fn`).
 #[derive(Clone, Copy, Encodable, Decodable, Debug)]
 pub struct FnHeader {
-    /// Whether this is `unsafe`, or has a default safety
+    /// Whether this is `unsafe`, or has a default safety.
     pub safety: Safety,
     /// Whether this is `async`, `gen`, or nothing.
     pub coroutine_kind: Option<CoroutineKind>,
     /// The `const` keyword, if any
     pub constness: Const,
-    /// The `extern` keyword and corresponding ABI string, if any
+    /// The `extern` keyword and corresponding ABI string, if any.
     pub ext: Extern,
 }
 
@@ -3251,7 +3255,7 @@ pub enum ItemKind {
     ///
     /// E.g., `trait Foo { .. }`, `trait Foo<T> { .. }` or `auto trait Foo {}`.
     Trait(Box<Trait>),
-    /// Trait alias
+    /// Trait alias.
     ///
     /// E.g., `trait Foo = Bar + Quux;`.
     TraitAlias(Generics, GenericBounds),

compiler/rustc_ast/src/attr/mod.rs

@@ -204,12 +204,14 @@ impl Attribute {
 
     pub fn tokens(&self) -> TokenStream {
         match &self.kind {
-            AttrKind::Normal(normal) => normal
-                .tokens
-                .as_ref()
-                .unwrap_or_else(|| panic!("attribute is missing tokens: {self:?}"))
-                .to_attr_token_stream()
-                .to_tokenstream(),
+            AttrKind::Normal(normal) => TokenStream::new(
+                normal
+                    .tokens
+                    .as_ref()
+                    .unwrap_or_else(|| panic!("attribute is missing tokens: {self:?}"))
+                    .to_attr_token_stream()
+                    .to_token_trees(),
+            ),
             &AttrKind::DocComment(comment_kind, data) => TokenStream::token_alone(
                 token::DocComment(comment_kind, self.style, data),
                 self.span,

compiler/rustc_ast/src/mut_visit.rs

@@ -582,6 +582,7 @@ fn noop_visit_generic_args<T: MutVisitor>(generic_args: &mut GenericArgs, vis: &
     match generic_args {
         GenericArgs::AngleBracketed(data) => vis.visit_angle_bracketed_parameter_data(data),
         GenericArgs::Parenthesized(data) => vis.visit_parenthesized_parameter_data(data),
+        GenericArgs::ParenthesizedElided(span) => vis.visit_span(span),
     }
 }