Merge branch 'master' into erik/target-triple

CONTRIBUTING.md

@@ -15,7 +15,7 @@ standard library in the [Standard library developers Guide][std-dev-guide], comm
 ## About the [rustc-dev-guide]
 
 The [rustc-dev-guide] is meant to help document how rustc –the Rust compiler– works,
-as well as to help new contributors get involved in rustc development. It is recommend
+as well as to help new contributors get involved in rustc development. It is recommended
 to read and understand the [rustc-dev-guide] before making a contribution. This guide
 talks about the different bots in the Rust ecosystem, the Rust development tools,
 bootstrapping, the compiler architecture, source code representation, and more.

Cargo.lock

@@ -553,7 +553,7 @@ checksum = "2da6da31387c7e4ef160ffab6d5e7f00c42626fe39aea70a7b0f1773f7dd6c1b"
 
 [[package]]
 name = "clippy"
-version = "0.1.75"
+version = "0.1.76"
 dependencies = [
  "anstream",
  "clippy_config",
@@ -581,7 +581,7 @@ dependencies = [
 
 [[package]]
 name = "clippy_config"
-version = "0.1.75"
+version = "0.1.76"
 dependencies = [
  "rustc-semver",
  "serde",
@@ -604,14 +604,13 @@ dependencies = [
 
 [[package]]
 name = "clippy_lints"
-version = "0.1.75"
+version = "0.1.76"
 dependencies = [
  "arrayvec",
  "cargo_metadata 0.15.4",
  "clippy_config",
  "clippy_utils",
  "declare_clippy_lint",
- "if_chain",
  "itertools",
  "quine-mc_cluskey",
  "regex",
@@ -630,11 +629,10 @@ dependencies = [
 
 [[package]]
 name = "clippy_utils"
-version = "0.1.75"
+version = "0.1.76"
 dependencies = [
  "arrayvec",
  "clippy_config",
- "if_chain",
  "itertools",
  "rustc-semver",
 ]
@@ -1016,7 +1014,7 @@ checksum = "a0afaad2b26fa326569eb264b1363e8ae3357618c43982b3f285f0774ce76b69"
 
 [[package]]
 name = "declare_clippy_lint"
-version = "0.1.75"
+version = "0.1.76"
 dependencies = [
  "itertools",
  "quote",
@@ -3817,6 +3815,7 @@ dependencies = [
  "rustc_query_system",
  "rustc_resolve",
  "rustc_session",
+ "rustc_smir",
  "rustc_span",
  "rustc_symbol_mangling",
  "rustc_target",

RELEASES.md

@@ -7,11 +7,12 @@ Language
 --------
 
 - [Codify that `std::mem::Discriminant<T>` does not depend on any lifetimes in T](https://github.com/rust-lang/rust/pull/104299/)
-- [Replace `private_in_public` lint with `private_interfaces` and `private_bounds` per RFC 2145](https://github.com/rust-lang/rust/pull/113126/)
+- [Replace `private_in_public` lint with `private_interfaces` and `private_bounds` per RFC 2145.](https://github.com/rust-lang/rust/pull/113126/)
   Read more in [RFC 2145](https://rust-lang.github.io/rfcs/2145-type-privacy.html).
 - [Allow explicit `#[repr(Rust)]`](https://github.com/rust-lang/rust/pull/114201/)
 - [closure field capturing: don't depend on alignment of packed fields](https://github.com/rust-lang/rust/pull/115315/)
 - [Enable MIR-based drop-tracking for `async` blocks](https://github.com/rust-lang/rust/pull/107421/)
+- [Stabilize `impl_trait_projections`](https://github.com/rust-lang/rust/pull/115659)
 
 <a id="1.74.0-Compiler"></a>
 
@@ -70,17 +71,17 @@ These APIs are now stable in const contexts:
 Cargo
 -----
 
-- [fix: Set MSRV for internal packages](https://github.com/rust-lang/cargo/pull/12381/)
-- [config: merge lists in precedence order](https://github.com/rust-lang/cargo/pull/12515/)
-- [fix(update): Clarify meaning of --aggressive as --recursive](https://github.com/rust-lang/cargo/pull/12544/)
-- [fix(update): Make `-p` more convenient by being positional](https://github.com/rust-lang/cargo/pull/12545/)
-- [feat(help): Add styling to help output ](https://github.com/rust-lang/cargo/pull/12578/)
-- [feat(pkgid): Allow incomplete versions when unambigious](https://github.com/rust-lang/cargo/pull/12614/)
-- [feat: stabilize credential-process and registry-auth](https://github.com/rust-lang/cargo/pull/12649/)
-- [feat(cli): Add '-n' to dry-run](https://github.com/rust-lang/cargo/pull/12660/)
+- [In `Cargo.toml`, stabilize `[lints]`](https://github.com/rust-lang/cargo/pull/12648/)
+- [Stabilize credential-process and registry-auth](https://github.com/rust-lang/cargo/pull/12649/)
+- [Stabilize `--keep-going` build flag](https://github.com/rust-lang/cargo/pull/12568/)
+- [Add styling to `--help` output](https://github.com/rust-lang/cargo/pull/12578/)
+- [For `cargo clean`, add `--dry-run` flag and summary line at the end](https://github.com/rust-lang/cargo/pull/12638)
+- [For `cargo update`, make `--package` more convenient by being positional](https://github.com/rust-lang/cargo/pull/12545/)
+- [For `cargo update`, clarify meaning of --aggressive as --recursive](https://github.com/rust-lang/cargo/pull/12544/)
+- [Add '-n' as an alias for `--dry-run`](https://github.com/rust-lang/cargo/pull/12660/)
+- [Allow version-prefixes in pkgid's (e.g. `--package` flags) to resolve ambiguities](https://github.com/rust-lang/cargo/pull/12614/)
+- [In `.cargo/config.toml`, merge lists in precedence order](https://github.com/rust-lang/cargo/pull/12515/)
 - [Add support for `target.'cfg(..)'.linker`](https://github.com/rust-lang/cargo/pull/12535/)
-- [Stabilize `--keep-going`](https://github.com/rust-lang/cargo/pull/12568/)
-- [feat: Stabilize lints](https://github.com/rust-lang/cargo/pull/12648/)
 
 <a id="1.74.0-Rustdoc"></a>
 
@@ -101,6 +102,7 @@ Compatibility Notes
 - [make Cell::swap panic if the Cells partially overlap](https://github.com/rust-lang/rust/pull/114795/)
 - [Reject invalid crate names in `--extern`](https://github.com/rust-lang/rust/pull/116001/)
 - [Don't resolve generic impls that may be shadowed by dyn built-in impls](https://github.com/rust-lang/rust/pull/114941/)
+- [The new `impl From<{&,&mut} [T; N]> for Vec<T>` is known to cause some inference failures with overly-generic code.](https://github.com/rust-lang/rust/issues/117054) In those examples using the `tui` crate, the combination of `AsRef<_>` and `Into<Vec>` leaves the middle type ambiguous, and the new `impl` adds another possibility, so it now requires an explicit type annotation.
 
 <a id="1.74.0-Internal-Changes"></a>
 
@@ -198,7 +200,6 @@ These APIs are now stable in const contexts:
 Cargo
 -----
 
-- [Encode URL params correctly for `SourceId` in `Cargo.lock`.](https://github.com/rust-lang/cargo/pull/12280/)
 - [Bail out an error when using `cargo::` in custom build script.](https://github.com/rust-lang/cargo/pull/12332/)
 
 <a id="1.73.0-Misc"></a>

compiler/rustc_abi/src/lib.rs

@@ -1,7 +1,7 @@
 #![cfg_attr(feature = "nightly", feature(step_trait))]
 #![cfg_attr(feature = "nightly", allow(internal_features))]
-#![cfg_attr(all(not(bootstrap), feature = "nightly"), doc(rust_logo))]
-#![cfg_attr(all(not(bootstrap), feature = "nightly"), feature(rustdoc_internals))]
+#![cfg_attr(feature = "nightly", doc(rust_logo))]
+#![cfg_attr(feature = "nightly", feature(rustdoc_internals))]
 
 use std::fmt;
 use std::num::{NonZeroUsize, ParseIntError};

compiler/rustc_arena/src/lib.rs

@@ -11,8 +11,8 @@
     html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/",
     test(no_crate_inject, attr(deny(warnings)))
 )]
-#![cfg_attr(not(bootstrap), doc(rust_logo))]
-#![cfg_attr(not(bootstrap), feature(rustdoc_internals))]
+#![doc(rust_logo)]
+#![feature(rustdoc_internals)]
 #![feature(core_intrinsics)]
 #![feature(dropck_eyepatch)]
 #![feature(new_uninit)]

compiler/rustc_ast/src/attr/mod.rs

@@ -342,7 +342,7 @@ impl MetaItem {
                 let span = span.with_hi(segments.last().unwrap().ident.span.hi());
                 Path { span, segments, tokens: None }
             }
-            Some(TokenTree::Token(Token { kind: token::Interpolated(nt), .. }, _)) => match &**nt {
+            Some(TokenTree::Token(Token { kind: token::Interpolated(nt), .. }, _)) => match &nt.0 {
                 token::Nonterminal::NtMeta(item) => return item.meta(item.path.span),
                 token::Nonterminal::NtPath(path) => (**path).clone(),
                 _ => return None,

compiler/rustc_ast/src/lib.rs

@@ -8,9 +8,9 @@
     html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/",
     test(attr(deny(warnings)))
 )]
-#![cfg_attr(not(bootstrap), doc(rust_logo))]
-#![cfg_attr(not(bootstrap), allow(internal_features))]
-#![cfg_attr(not(bootstrap), feature(rustdoc_internals))]
+#![doc(rust_logo)]
+#![allow(internal_features)]
+#![feature(rustdoc_internals)]
 #![feature(associated_type_bounds)]
 #![feature(box_patterns)]
 #![feature(const_trait_impl)]

compiler/rustc_ast/src/mut_visit.rs

@@ -764,7 +764,10 @@ pub fn visit_token<T: MutVisitor>(t: &mut Token, vis: &mut T) {
             return; // Avoid visiting the span for the second time.
         }
         token::Interpolated(nt) => {
-            visit_nonterminal(Lrc::make_mut(nt), vis);
+            let nt = Lrc::make_mut(nt);
+            let (nt, sp) = (&mut nt.0, &mut nt.1);
+            vis.visit_span(sp);
+            visit_nonterminal(nt, vis);
         }
         _ => {}
     }

compiler/rustc_ast/src/token.rs

@@ -110,7 +110,7 @@ impl Lit {
             Ident(name, false) if name.is_bool_lit() => Some(Lit::new(Bool, name, None)),
             Literal(token_lit) => Some(token_lit),
             Interpolated(ref nt)
-                if let NtExpr(expr) | NtLiteral(expr) = &**nt
+                if let NtExpr(expr) | NtLiteral(expr) = &nt.0
                     && let ast::ExprKind::Lit(token_lit) = expr.kind =>
             {
                 Some(token_lit)
@@ -314,7 +314,7 @@ pub enum TokenKind {
     /// - It prevents `Token` from implementing `Copy`.
     /// It adds complexity and likely slows things down. Please don't add new
     /// occurrences of this token kind!
-    Interpolated(Lrc<Nonterminal>),
+    Interpolated(Lrc<(Nonterminal, Span)>),
 
     /// A doc comment token.
     /// `Symbol` is the doc comment's data excluding its "quotes" (`///`, `/**`, etc)
@@ -388,7 +388,8 @@ impl TokenKind {
         match *self {
             Comma => Some(vec![Dot, Lt, Semi]),
             Semi => Some(vec![Colon, Comma]),
-            FatArrow => Some(vec![Eq, RArrow]),
+            Colon => Some(vec![Semi]),
+            FatArrow => Some(vec![Eq, RArrow, Ge, Gt]),
             _ => None,
         }
     }
@@ -421,7 +422,7 @@ impl Token {
     /// if they keep spans or perform edition checks.
     pub fn uninterpolated_span(&self) -> Span {
         match &self.kind {
-            Interpolated(nt) => nt.span(),
+            Interpolated(nt) => nt.0.use_span(),
             _ => self.span,
         }
     }
@@ -464,7 +465,7 @@ impl Token {
             ModSep                            | // global path
             Lifetime(..)                      | // labeled loop
             Pound                             => true, // expression attributes
-            Interpolated(ref nt) => matches!(**nt, NtLiteral(..) |
+            Interpolated(ref nt) => matches!(&nt.0, NtLiteral(..) |
                 NtExpr(..)    |
                 NtBlock(..)   |
                 NtPath(..)),
@@ -488,7 +489,7 @@ impl Token {
             | DotDot | DotDotDot | DotDotEq      // ranges
             | Lt | BinOp(Shl)                    // associated path
             | ModSep                    => true, // global path
-            Interpolated(ref nt) => matches!(**nt, NtLiteral(..) |
+            Interpolated(ref nt) => matches!(&nt.0, NtLiteral(..) |
                 NtPat(..)     |
                 NtBlock(..)   |
                 NtPath(..)),
@@ -511,7 +512,7 @@ impl Token {
             Lifetime(..)                | // lifetime bound in trait object
             Lt | BinOp(Shl)             | // associated path
             ModSep                      => true, // global path
-            Interpolated(ref nt) => matches!(**nt, NtTy(..) | NtPath(..)),
+            Interpolated(ref nt) => matches!(&nt.0, NtTy(..) | NtPath(..)),
             // For anonymous structs or unions, which only appear in specific positions
             // (type of struct fields or union fields), we don't consider them as regular types
             _ => false,
@@ -522,7 +523,7 @@ impl Token {
     pub fn can_begin_const_arg(&self) -> bool {
         match self.kind {
             OpenDelim(Delimiter::Brace) => true,
-            Interpolated(ref nt) => matches!(**nt, NtExpr(..) | NtBlock(..) | NtLiteral(..)),
+            Interpolated(ref nt) => matches!(&nt.0, NtExpr(..) | NtBlock(..) | NtLiteral(..)),
             _ => self.can_begin_literal_maybe_minus(),
         }
     }
@@ -576,7 +577,7 @@ impl Token {
         match self.uninterpolate().kind {
             Literal(..) | BinOp(Minus) => true,
             Ident(name, false) if name.is_bool_lit() => true,
-            Interpolated(ref nt) => match &**nt {
+            Interpolated(ref nt) => match &nt.0 {
                 NtLiteral(_) => true,
                 NtExpr(e) => match &e.kind {
                     ast::ExprKind::Lit(_) => true,
@@ -597,9 +598,9 @@ impl Token {
     /// otherwise returns the original token.
     pub fn uninterpolate(&self) -> Cow<'_, Token> {
         match &self.kind {
-            Interpolated(nt) => match **nt {
+            Interpolated(nt) => match &nt.0 {
                 NtIdent(ident, is_raw) => {
-                    Cow::Owned(Token::new(Ident(ident.name, is_raw), ident.span))
+                    Cow::Owned(Token::new(Ident(ident.name, *is_raw), ident.span))
                 }
                 NtLifetime(ident) => Cow::Owned(Token::new(Lifetime(ident.name), ident.span)),
                 _ => Cow::Borrowed(self),
@@ -614,8 +615,8 @@ impl Token {
         // We avoid using `Token::uninterpolate` here because it's slow.
         match &self.kind {
             &Ident(name, is_raw) => Some((Ident::new(name, self.span), is_raw)),
-            Interpolated(nt) => match **nt {
-                NtIdent(ident, is_raw) => Some((ident, is_raw)),
+            Interpolated(nt) => match &nt.0 {
+                NtIdent(ident, is_raw) => Some((*ident, *is_raw)),
                 _ => None,
             },
             _ => None,
@@ -628,8 +629,8 @@ impl Token {
         // We avoid using `Token::uninterpolate` here because it's slow.
         match &self.kind {
             &Lifetime(name) => Some(Ident::new(name, self.span)),
-            Interpolated(nt) => match **nt {
-                NtLifetime(ident) => Some(ident),
+            Interpolated(nt) => match &nt.0 {
+                NtLifetime(ident) => Some(*ident),
                 _ => None,
             },
             _ => None,
@@ -655,7 +656,7 @@ impl Token {
     /// Returns `true` if the token is an interpolated path.
     fn is_path(&self) -> bool {
         if let Interpolated(nt) = &self.kind
-            && let NtPath(..) = **nt
+            && let NtPath(..) = &nt.0
         {
             return true;
         }
@@ -668,7 +669,7 @@ impl Token {
     /// (which happens while parsing the result of macro expansion)?
     pub fn is_whole_expr(&self) -> bool {
         if let Interpolated(nt) = &self.kind
-            && let NtExpr(_) | NtLiteral(_) | NtPath(_) | NtBlock(_) = **nt
+            && let NtExpr(_) | NtLiteral(_) | NtPath(_) | NtBlock(_) = &nt.0
         {
             return true;
         }
@@ -679,7 +680,7 @@ impl Token {
     /// Is the token an interpolated block (`$b:block`)?
     pub fn is_whole_block(&self) -> bool {
         if let Interpolated(nt) = &self.kind
-            && let NtBlock(..) = **nt
+            && let NtBlock(..) = &nt.0
         {
             return true;
         }
@@ -927,7 +928,7 @@ impl fmt::Display for NonterminalKind {
 }
 
 impl Nonterminal {
-    pub fn span(&self) -> Span {
+    pub fn use_span(&self) -> Span {
         match self {
             NtItem(item) => item.span,
             NtBlock(block) => block.span,
@@ -941,6 +942,23 @@ impl Nonterminal {
             NtVis(vis) => vis.span,
         }
     }
+
+    pub fn descr(&self) -> &'static str {
+        match self {
+            NtItem(..) => "item",
+            NtBlock(..) => "block",
+            NtStmt(..) => "statement",
+            NtPat(..) => "pattern",
+            NtExpr(..) => "expression",
+            NtLiteral(..) => "literal",
+            NtTy(..) => "type",
+            NtIdent(..) => "identifier",
+            NtLifetime(..) => "lifetime",
+            NtMeta(..) => "attribute",
+            NtPath(..) => "path",
+            NtVis(..) => "visibility",
+        }
+    }
 }
 
 impl PartialEq for Nonterminal {

compiler/rustc_ast/src/tokenstream.rs

@@ -477,13 +477,13 @@ impl TokenStream {
 
     fn flatten_token(token: &Token, spacing: Spacing) -> TokenTree {
         match &token.kind {
-            token::Interpolated(nt) if let token::NtIdent(ident, is_raw) = **nt => {
+            token::Interpolated(nt) if let token::NtIdent(ident, is_raw) = nt.0 => {
                 TokenTree::Token(Token::new(token::Ident(ident.name, is_raw), ident.span), spacing)
             }
             token::Interpolated(nt) => TokenTree::Delimited(
                 DelimSpan::from_single(token.span),
                 Delimiter::Invisible,
-                TokenStream::from_nonterminal_ast(nt).flattened(),
+                TokenStream::from_nonterminal_ast(&nt.0).flattened(),
             ),
             _ => TokenTree::Token(token.clone(), spacing),
         }

compiler/rustc_ast_lowering/src/expr.rs

@@ -42,8 +42,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     }
                     // Merge attributes into the inner expression.
                     if !e.attrs.is_empty() {
-                        let old_attrs =
-                            self.attrs.get(&ex.hir_id.local_id).map(|la| *la).unwrap_or(&[]);
+                        let old_attrs = self.attrs.get(&ex.hir_id.local_id).copied().unwrap_or(&[]);
                         self.attrs.insert(
                             ex.hir_id.local_id,
                             &*self.arena.alloc_from_iter(