Rollup of 13 pull requests

Cargo.lock

@@ -3013,29 +3013,29 @@ dependencies = [
 
 [[package]]
 name = "pest"
-version = "2.3.0"
+version = "2.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b0560d531d1febc25a3c9398a62a71256c0178f2e3443baedd9ad4bb8c9deb4"
+checksum = "0f6e86fb9e7026527a0d46bc308b841d73170ef8f443e1807f6ef88526a816d4"
 dependencies = [
  "thiserror",
  "ucd-trie",
 ]
 
 [[package]]
 name = "pest_derive"
-version = "2.3.0"
+version = "2.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "905708f7f674518498c1f8d644481440f476d39ca6ecae83319bba7c6c12da91"
+checksum = "96504449aa860c8dcde14f9fba5c58dc6658688ca1fe363589d6327b8662c603"
 dependencies = [
  "pest",
  "pest_generator",
 ]
 
 [[package]]
 name = "pest_generator"
-version = "2.3.0"
+version = "2.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5803d8284a629cc999094ecd630f55e91b561a1d1ba75e233b00ae13b91a69ad"
+checksum = "798e0220d1111ae63d66cb66a5dcb3fc2d986d520b98e49e1852bfdb11d7c5e7"
 dependencies = [
  "pest",
  "pest_meta",
@@ -3046,13 +3046,13 @@ dependencies = [
 
 [[package]]
 name = "pest_meta"
-version = "2.3.0"
+version = "2.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1538eb784f07615c6d9a8ab061089c6c54a344c5b4301db51990ca1c241e8c04"
+checksum = "984298b75898e30a843e278a9f2452c31e349a073a0ce6fd950a12a74464e065"
 dependencies = [
  "once_cell",
  "pest",
- "sha-1",
+ "sha1",
 ]
 
 [[package]]
@@ -4684,7 +4684,7 @@ dependencies = [
  "rustc_macros",
  "rustc_serialize",
  "scoped-tls",
- "sha-1",
+ "sha1",
  "sha2",
  "tracing",
  "unicode-width",
@@ -5093,17 +5093,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "sha-1"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "028f48d513f9678cda28f6e4064755b3fbb2af6acd672f2c209b62323f7aea0f"
-dependencies = [
- "cfg-if",
- "cpufeatures",
- "digest",
-]
-
 [[package]]
 name = "sha1"
 version = "0.10.5"
@@ -5529,18 +5518,18 @@ checksum = "ceb05e71730d396f960f8f3901cdb41be2d339b303e9d7d3a07c5ff0536e671b"
 
 [[package]]
 name = "thiserror"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d0a539a918745651435ac7db7a18761589a94cd7e94cd56999f828bf73c8a57"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c251e90f708e16c49a16f4917dc2131e75222b72edfa9cb7f7c58ae56aae0c09"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -5821,9 +5810,9 @@ dependencies = [
 
 [[package]]
 name = "ucd-trie"
-version = "0.1.3"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
+checksum = "9e79c4d996edb816c91e4308506774452e55e95c3c9de07b6729e17e15a5ef81"
 
 [[package]]
 name = "ui_test"

compiler/rustc_expand/src/base.rs

@@ -31,11 +31,11 @@ use rustc_span::edition::Edition;
 use rustc_span::hygiene::{AstPass, ExpnData, ExpnKind, LocalExpnId};
 use rustc_span::source_map::SourceMap;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
-use rustc_span::{BytePos, FileName, RealFileName, Span, DUMMY_SP};
+use rustc_span::{BytePos, FileName, Span, DUMMY_SP};
 use smallvec::{smallvec, SmallVec};
 
 use std::iter;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::rc::Rc;
 
 pub(crate) use rustc_span::hygiene::MacroKind;
@@ -1423,8 +1423,10 @@ fn pretty_printing_compatibility_hack(item: &Item, sess: &ParseSess) -> bool {
             if let [variant] = &*enum_def.variants {
                 if variant.ident.name == sym::Input {
                     let filename = sess.source_map().span_to_filename(item.ident.span);
-                    if let FileName::Real(RealFileName::LocalPath(path)) = filename {
-                        if let Some(c) = path
+                    if let FileName::Real(real) = filename {
+                        if let Some(c) = real
+                            .local_path()
+                            .unwrap_or(Path::new(""))
                             .components()
                             .flat_map(|c| c.as_os_str().to_str())
                             .find(|c| c.starts_with("rental") || c.starts_with("allsorts-rental"))

compiler/rustc_span/Cargo.toml

@@ -15,6 +15,6 @@ scoped-tls = "1.0"
 unicode-width = "0.1.4"
 cfg-if = "1.0"
 tracing = "0.1"
-sha1 = { package = "sha-1", version = "0.10.0" }
+sha1 = "0.10.0"
 sha2 = "0.10.1"
 md5 = { package = "md-5", version = "0.10.0" }

library/core/src/fmt/mod.rs

@@ -174,6 +174,11 @@ pub trait Write {
     /// This method should generally not be invoked manually, but rather through
     /// the [`write!`] macro itself.
     ///
+    /// # Errors
+    ///
+    /// This function will return an instance of [`Error`] on error. Please see
+    /// [write_str](Write::write_str) for details.
+    ///
     /// # Examples
     ///
     /// ```

library/core/src/option.rs

@@ -652,13 +652,14 @@ impl<T> Option<T> {
     ///
     /// # Examples
     ///
-    /// Converts an <code>Option<[String]></code> into an <code>Option<[usize]></code>, preserving
-    /// the original. The [`map`] method takes the `self` argument by value, consuming the original,
-    /// so this technique uses `as_ref` to first take an `Option` to a reference
-    /// to the value inside the original.
+    /// Calculates the length of an <code>Option<[String]></code> as an <code>Option<[usize]></code>
+    /// without moving the [`String`]. The [`map`] method takes the `self` argument by value,
+    /// consuming the original, so this technique uses `as_ref` to first take an `Option` to a
+    /// reference to the value inside the original.
     ///
     /// [`map`]: Option::map
     /// [String]: ../../std/string/struct.String.html "String"
+    /// [`String`]: ../../std/string/struct.String.html "String"
     ///
     /// ```
     /// let text: Option<String> = Some("Hello, world!".to_string());
@@ -946,8 +947,8 @@ impl<T> Option<T> {
     ///
     /// # Examples
     ///
-    /// Converts an <code>Option<[String]></code> into an <code>Option<[usize]></code>, consuming
-    /// the original:
+    /// Calculates the length of an <code>Option<[String]></code> as an
+    /// <code>Option<[usize]></code>, consuming the original:
     ///
     /// [String]: ../../std/string/struct.String.html "String"
     /// ```

library/core/src/sync/atomic.rs

@@ -1786,6 +1786,42 @@ impl<T> AtomicPtr<T> {
         // SAFETY: data races are prevented by atomic intrinsics.
         unsafe { atomic_xor(self.p.get(), core::ptr::invalid_mut(val), order).cast() }
     }
+
+    /// Returns a mutable pointer to the underlying pointer.
+    ///
+    /// Doing non-atomic reads and writes on the resulting integer can be a data race.
+    /// This method is mostly useful for FFI, where the function signature may use
+    /// `*mut *mut T` instead of `&AtomicPtr<T>`.
+    ///
+    /// Returning an `*mut` pointer from a shared reference to this atomic is safe because the
+    /// atomic types work with interior mutability. All modifications of an atomic change the value
+    /// through a shared reference, and can do so safely as long as they use atomic operations. Any
+    /// use of the returned raw pointer requires an `unsafe` block and still has to uphold the same
+    /// restriction: operations on it must be atomic.
+    ///
+    /// # Examples
+    ///
+    /// ```ignore (extern-declaration)
+    /// #![feature(atomic_mut_ptr)]
+    //// use std::sync::atomic::AtomicPtr;
+    ///
+    /// extern "C" {
+    ///     fn my_atomic_op(arg: *mut *mut u32);
+    /// }
+    ///
+    /// let mut value = 17;
+    /// let atomic = AtomicPtr::new(&mut value);
+    ///
+    /// // SAFETY: Safe as long as `my_atomic_op` is atomic.
+    /// unsafe {
+    ///     my_atomic_op(atomic.as_mut_ptr());
+    /// }
+    /// ```
+    #[inline]
+    #[unstable(feature = "atomic_mut_ptr", reason = "recently added", issue = "66893")]
+    pub fn as_mut_ptr(&self) -> *mut *mut T {
+        self.p.get()
+    }
 }
 
 #[cfg(target_has_atomic_load_store = "8")]
@@ -2678,9 +2714,9 @@ macro_rules! atomic_int {
             #[doc = concat!("    fn my_atomic_op(arg: *mut ", stringify!($int_type), ");")]
             /// }
             ///
-            #[doc = concat!("let mut atomic = ", stringify!($atomic_type), "::new(1);")]
+            #[doc = concat!("let atomic = ", stringify!($atomic_type), "::new(1);")]
             ///
-            // SAFETY: Safe as long as `my_atomic_op` is atomic.
+            /// // SAFETY: Safe as long as `my_atomic_op` is atomic.
             /// unsafe {
             ///     my_atomic_op(atomic.as_mut_ptr());
             /// }

library/std/src/path.rs

@@ -3177,33 +3177,33 @@ impl<'a> IntoIterator for &'a Path {
 }
 
 macro_rules! impl_cmp {
-    ($lhs:ty, $rhs: ty) => {
+    (<$($life:lifetime),*> $lhs:ty, $rhs: ty) => {
         #[stable(feature = "partialeq_path", since = "1.6.0")]
-        impl<'a, 'b> PartialEq<$rhs> for $lhs {
+        impl<$($life),*> PartialEq<$rhs> for $lhs {
             #[inline]
             fn eq(&self, other: &$rhs) -> bool {
                 <Path as PartialEq>::eq(self, other)
             }
         }
 
         #[stable(feature = "partialeq_path", since = "1.6.0")]
-        impl<'a, 'b> PartialEq<$lhs> for $rhs {
+        impl<$($life),*> PartialEq<$lhs> for $rhs {
             #[inline]
             fn eq(&self, other: &$lhs) -> bool {
                 <Path as PartialEq>::eq(self, other)
             }
         }
 
         #[stable(feature = "cmp_path", since = "1.8.0")]
-        impl<'a, 'b> PartialOrd<$rhs> for $lhs {
+        impl<$($life),*> PartialOrd<$rhs> for $lhs {
             #[inline]
             fn partial_cmp(&self, other: &$rhs) -> Option<cmp::Ordering> {
                 <Path as PartialOrd>::partial_cmp(self, other)
             }
         }
 
         #[stable(feature = "cmp_path", since = "1.8.0")]
-        impl<'a, 'b> PartialOrd<$lhs> for $rhs {
+        impl<$($life),*> PartialOrd<$lhs> for $rhs {
             #[inline]
             fn partial_cmp(&self, other: &$lhs) -> Option<cmp::Ordering> {
                 <Path as PartialOrd>::partial_cmp(self, other)
@@ -3212,40 +3212,40 @@ macro_rules! impl_cmp {
     };
 }
 
-impl_cmp!(PathBuf, Path);
-impl_cmp!(PathBuf, &'a Path);
-impl_cmp!(Cow<'a, Path>, Path);
-impl_cmp!(Cow<'a, Path>, &'b Path);
-impl_cmp!(Cow<'a, Path>, PathBuf);
+impl_cmp!(<> PathBuf, Path);
+impl_cmp!(<'a> PathBuf, &'a Path);
+impl_cmp!(<'a> Cow<'a, Path>, Path);
+impl_cmp!(<'a, 'b> Cow<'a, Path>, &'b Path);
+impl_cmp!(<'a> Cow<'a, Path>, PathBuf);
 
 macro_rules! impl_cmp_os_str {
-    ($lhs:ty, $rhs: ty) => {
+    (<$($life:lifetime),*> $lhs:ty, $rhs: ty) => {
         #[stable(feature = "cmp_path", since = "1.8.0")]
-        impl<'a, 'b> PartialEq<$rhs> for $lhs {
+        impl<$($life),*> PartialEq<$rhs> for $lhs {
             #[inline]
             fn eq(&self, other: &$rhs) -> bool {
                 <Path as PartialEq>::eq(self, other.as_ref())
             }
         }
 
         #[stable(feature = "cmp_path", since = "1.8.0")]
-        impl<'a, 'b> PartialEq<$lhs> for $rhs {
+        impl<$($life),*> PartialEq<$lhs> for $rhs {
             #[inline]
             fn eq(&self, other: &$lhs) -> bool {
                 <Path as PartialEq>::eq(self.as_ref(), other)
             }
         }
 
         #[stable(feature = "cmp_path", since = "1.8.0")]
-        impl<'a, 'b> PartialOrd<$rhs> for $lhs {
+        impl<$($life),*> PartialOrd<$rhs> for $lhs {
             #[inline]
             fn partial_cmp(&self, other: &$rhs) -> Option<cmp::Ordering> {
                 <Path as PartialOrd>::partial_cmp(self, other.as_ref())
             }
         }
 
         #[stable(feature = "cmp_path", since = "1.8.0")]
-        impl<'a, 'b> PartialOrd<$lhs> for $rhs {
+        impl<$($life),*> PartialOrd<$lhs> for $rhs {
             #[inline]
             fn partial_cmp(&self, other: &$lhs) -> Option<cmp::Ordering> {
                 <Path as PartialOrd>::partial_cmp(self.as_ref(), other)
@@ -3254,20 +3254,20 @@ macro_rules! impl_cmp_os_str {
     };
 }
 
-impl_cmp_os_str!(PathBuf, OsStr);
-impl_cmp_os_str!(PathBuf, &'a OsStr);
-impl_cmp_os_str!(PathBuf, Cow<'a, OsStr>);
-impl_cmp_os_str!(PathBuf, OsString);
-impl_cmp_os_str!(Path, OsStr);
-impl_cmp_os_str!(Path, &'a OsStr);
-impl_cmp_os_str!(Path, Cow<'a, OsStr>);
-impl_cmp_os_str!(Path, OsString);
-impl_cmp_os_str!(&'a Path, OsStr);
-impl_cmp_os_str!(&'a Path, Cow<'b, OsStr>);
-impl_cmp_os_str!(&'a Path, OsString);
-impl_cmp_os_str!(Cow<'a, Path>, OsStr);
-impl_cmp_os_str!(Cow<'a, Path>, &'b OsStr);
-impl_cmp_os_str!(Cow<'a, Path>, OsString);
+impl_cmp_os_str!(<> PathBuf, OsStr);
+impl_cmp_os_str!(<'a> PathBuf, &'a OsStr);
+impl_cmp_os_str!(<'a> PathBuf, Cow<'a, OsStr>);
+impl_cmp_os_str!(<> PathBuf, OsString);
+impl_cmp_os_str!(<> Path, OsStr);
+impl_cmp_os_str!(<'a> Path, &'a OsStr);
+impl_cmp_os_str!(<'a> Path, Cow<'a, OsStr>);
+impl_cmp_os_str!(<> Path, OsString);
+impl_cmp_os_str!(<'a> &'a Path, OsStr);
+impl_cmp_os_str!(<'a, 'b> &'a Path, Cow<'b, OsStr>);
+impl_cmp_os_str!(<'a> &'a Path, OsString);
+impl_cmp_os_str!(<'a> Cow<'a, Path>, OsStr);
+impl_cmp_os_str!(<'a, 'b> Cow<'a, Path>, &'b OsStr);
+impl_cmp_os_str!(<'a> Cow<'a, Path>, OsString);
 
 #[stable(since = "1.7.0", feature = "strip_prefix")]
 impl fmt::Display for StripPrefixError {

src/README.md

@@ -1,8 +1,7 @@
-This directory contains the source code of the rust project, including:
+This directory contains some source code for the Rust project, including:
 
-- The test suite
 - The bootstrapping build system
-- Various submodules for tools, like cargo, etc.
+- Various submodules for tools, like cargo, tidy, etc.
 
 For more information on how various parts of the compiler work, see the [rustc dev guide].
 

src/ci/docker/host-x86_64/mingw-check/Dockerfile

@@ -45,6 +45,7 @@ ENV SCRIPT python3 ../x.py --stage 2 test src/tools/expand-yaml-anchors && \
            python3 ../x.py test --stage 0 src/tools/compiletest && \
            python3 ../x.py test --stage 0 core alloc std test proc_macro && \
            # Build both public and internal documentation.
+           RUSTDOCFLAGS=\"--document-private-items --document-hidden-items\" python3 ../x.py doc --stage 0 compiler && \
            RUSTDOCFLAGS=\"--document-private-items --document-hidden-items\" python3 ../x.py doc --stage 0 library/test && \
            /scripts/validate-toolstate.sh && \
            /scripts/validate-error-codes.sh && \

src/doc/rustdoc/src/lints.md

@@ -261,7 +261,7 @@ typo mistakes for some common attributes.
 
 ## `invalid_html_tags`
 
-This lint is **allowed by default** and is **nightly-only**. It detects unclosed
+This lint **warns by default**. It detects unclosed
 or invalid HTML tags. For example:
 
 ```rust