Auto merge of #84490 - JohnTitor:rollup-wrdj4ko, r=JohnTitor

Rollup of 11 pull requests

Successful merges:

 - #80805 (Improve `Iterator::by_ref` example)
 - #84248 (Remove duplicated fn(Box<[T]>) -> Vec<T>)
 - #84321 (rustdoc: Convert sub-variant toggle to HTML)
 - #84359 (⬆️ rust-analyzer)
 - #84374 (Clean up .gitignore)
 - #84387 (Move `sys_common::poison` to `sync::poison`)
 - #84430 (doc/platform-support: clarify UEFI support)
 - #84433 (Prevent control, shift and alt keys to make search input lose focus)
 - #84444 (doc: Get rid of "[+] show undocumented items" toggle on numeric From impls)
 - #84456 (Fix ICE if original_span(fn_sig) returns a span not in body sourcefile)
 - #84469 (Update comment on `PrimTy::name_str`)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

.gitignore

@@ -5,53 +5,71 @@
 # created during manual debugging and many people like to clean up instead of
 # having git ignore such leftovers. You can use `.git/info/exclude` to
 # configure your local ignore list.
-# FIXME: This needs cleanup.
+
-*~
+## File system
+.DS_Store
+desktop.ini
+
+## Editor
 *.swp
 *.swo
-.#*
+Session.vim
-.DS_Store
 .cproject
-.hg/
-.hgignore
 .idea
 *.iml
-__pycache__/
-*.py[cod]
-*$py.class
-.project
-.settings/
-.valgrindrc
 .vscode
+.project
 .favorites.json
-/Makefile
+.settings/
-/build/
+
+## Tool
+.valgrindrc
+.cargo
+# Included because it is part of the test case
+!/src/test/run-make/thumb-none-qemu/example/.cargo
+
+## Configuration
 /config.toml
-/dist/
+/Makefile
+config.mk
+config.stamp
+no_llvm_build
+
+## Build
 /dl/
 /doc/
 /inst/
 /llvm/
 /mingw-build/
-/src/tools/x/target
+/build/
-# Created by default with `src/ci/docker/run.sh`:
+/dist/
-/obj/
 /unicode-downloads
 /target
-# Generated by compiletest for incremental:
+/src/tools/x/target
+# Generated by compiletest for incremental
 /tmp/
+# Created by default with `src/ci/docker/run.sh`
+/obj/
+
+## Temporary files
+*~
+\#*
+\#*\#
+.#*
+
+## Tags
 tags
 tags.*
 TAGS
 TAGS.*
-\#*
+
-\#*\#
+## Python
-config.mk
+__pycache__/
-config.stamp
+*.py[cod]
-Session.vim
+*$py.class
-.cargo
+
-!/src/test/run-make/thumb-none-qemu/example/.cargo
+## Node
-no_llvm_build
 **node_modules
 **package-lock.json
+
 # Before adding new lines, see the comment at the top.

compiler/rustc_hir/src/hir.rs

@@ -2201,7 +2201,7 @@ impl PrimTy {
 
     /// Like [`PrimTy::name`], but returns a &str instead of a symbol.
     ///
-    /// Used by rustdoc.
+    /// Used by clippy.
     pub fn name_str(self) -> &'static str {
         match self {
             PrimTy::Int(i) => i.name_str(),

compiler/rustc_mir/src/transform/coverage/mod.rs

@@ -111,7 +111,8 @@ impl<'a, 'tcx> Instrumentor<'a, 'tcx> {
         let body_span = hir_body.value.span;
         let source_file = source_map.lookup_source_file(body_span.lo());
         let fn_sig_span = match some_fn_sig.filter(|fn_sig| {
-            Lrc::ptr_eq(&source_file, &source_map.lookup_source_file(fn_sig.span.hi()))
+            fn_sig.span.ctxt() == body_span.ctxt()
+                && Lrc::ptr_eq(&source_file, &source_map.lookup_source_file(fn_sig.span.hi()))
         }) {
             Some(fn_sig) => fn_sig.span.with_hi(body_span.lo()),
             None => body_span.shrink_to_lo(),

compiler/rustc_mir/src/transform/coverage/spans.rs

@@ -240,13 +240,13 @@ impl<'a, 'tcx> CoverageSpans<'a, 'tcx> {
     /// to be).
     pub(super) fn generate_coverage_spans(
         mir_body: &'a mir::Body<'tcx>,
-        fn_sig_span: Span,
+        fn_sig_span: Span, // Ensured to be same SourceFile and SyntaxContext as `body_span`
         body_span: Span,
         basic_coverage_blocks: &'a CoverageGraph,
     ) -> Vec<CoverageSpan> {
         let mut coverage_spans = CoverageSpans {
             mir_body,
-            fn_sig_span: fn_sig_source_span(fn_sig_span, body_span),
+            fn_sig_span,
             body_span,
             basic_coverage_blocks,
             sorted_spans_iter: None,
@@ -731,11 +731,6 @@ pub(super) fn filtered_terminator_span(
     }
 }
 
-#[inline]
-fn fn_sig_source_span(fn_sig_span: Span, body_span: Span) -> Span {
-    original_sp(fn_sig_span, body_span).with_ctxt(body_span.ctxt())
-}
-
 #[inline]
 fn function_source_span(span: Span, body_span: Span) -> Span {
     let span = original_sp(span, body_span).with_ctxt(body_span.ctxt());

library/alloc/src/vec/mod.rs

@@ -2810,8 +2810,7 @@ impl<T, A: Allocator> From<Box<[T], A>> for Vec<T, A> {
     /// assert_eq!(Vec::from(b), vec![1, 2, 3]);
     /// ```
     fn from(s: Box<[T], A>) -> Self {
-        let len = s.len();
+        s.into_vec()
-        Self { buf: RawVec::from_box(s), len }
     }
 }
 

library/core/src/convert/num.rs

@@ -45,8 +45,10 @@ impl_float_to_int!(f64 => u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize);
 macro_rules! impl_from {
     ($Small: ty, $Large: ty, #[$attr:meta], $doc: expr) => {
         #[$attr]
-        #[doc = $doc]
         impl From<$Small> for $Large {
+            // Rustdocs on the impl block show a "[+] show undocumented items" toggle.
+            // Rustdocs on functions do not.
+            #[doc = $doc]
             #[inline]
             fn from(small: $Small) -> Self {
                 small as Self
@@ -383,8 +385,10 @@ use crate::num::NonZeroUsize;
 macro_rules! nzint_impl_from {
     ($Small: ty, $Large: ty, #[$attr:meta], $doc: expr) => {
         #[$attr]
-        #[doc = $doc]
         impl From<$Small> for $Large {
+            // Rustdocs on the impl block show a "[+] show undocumented items" toggle.
+            // Rustdocs on functions do not.
+            #[doc = $doc]
             #[inline]
             fn from(small: $Small) -> Self {
                 // SAFETY: input type guarantees the value is non-zero
@@ -450,10 +454,12 @@ nzint_impl_from! { NonZeroU64, NonZeroI128, #[stable(feature = "nz_int_conv", si
 macro_rules! nzint_impl_try_from_int {
     ($Int: ty, $NonZeroInt: ty, #[$attr:meta], $doc: expr) => {
         #[$attr]
-        #[doc = $doc]
         impl TryFrom<$Int> for $NonZeroInt {
             type Error = TryFromIntError;
 
+            // Rustdocs on the impl block show a "[+] show undocumented items" toggle.
+            // Rustdocs on functions do not.
+            #[doc = $doc]
             #[inline]
             fn try_from(value: $Int) -> Result<Self, Self::Error> {
                 Self::new(value).ok_or(TryFromIntError(()))
@@ -489,10 +495,12 @@ nzint_impl_try_from_int! { isize, NonZeroIsize, #[stable(feature = "nzint_try_fr
 macro_rules! nzint_impl_try_from_nzint {
     ($From:ty => $To:ty, $doc: expr) => {
         #[stable(feature = "nzint_try_from_nzint_conv", since = "1.49.0")]
-        #[doc = $doc]
         impl TryFrom<$From> for $To {
             type Error = TryFromIntError;
 
+            // Rustdocs on the impl block show a "[+] show undocumented items" toggle.
+            // Rustdocs on functions do not.
+            #[doc = $doc]
             #[inline]
             fn try_from(value: $From) -> Result<Self, Self::Error> {
                 TryFrom::try_from(value.get()).map(|v| {

library/core/src/iter/traits/iterator.rs

@@ -1646,31 +1646,16 @@ pub trait Iterator {
     /// Basic usage:
     ///
     /// ```
-    /// let a = [1, 2, 3];
+    /// let mut words = vec!["hello", "world", "of", "Rust"].into_iter();
     ///
-    /// let iter = a.iter();
+    /// // Take the first two words.
+    /// let hello_world: Vec<_> = words.by_ref().take(2).collect();
+    /// assert_eq!(hello_world, vec!["hello", "world"]);
     ///
-    /// let sum: i32 = iter.take(5).fold(0, |acc, i| acc + i);
+    /// // Collect the rest of the words.
-    ///
+    /// // We can only do this because we used `by_ref` earlier.
-    /// assert_eq!(sum, 6);
+    /// let of_rust: Vec<_> = words.collect();
-    ///
+    /// assert_eq!(of_rust, vec!["of", "Rust"]);
-    /// // if we try to use iter again, it won't work. The following line
-    /// // gives "error: use of moved value: `iter`
-    /// // assert_eq!(iter.next(), None);
-    ///
-    /// // let's try that again
-    /// let a = [1, 2, 3];
-    ///
-    /// let mut iter = a.iter();
-    ///
-    /// // instead, we add in a .by_ref()
-    /// let sum: i32 = iter.by_ref().take(2).fold(0, |acc, i| acc + i);
-    ///
-    /// assert_eq!(sum, 3);
-    ///
-    /// // now this is just fine:
-    /// assert_eq!(iter.next(), Some(&3));
-    /// assert_eq!(iter.next(), None);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     fn by_ref(&mut self) -> &mut Self

library/std/src/sync/condvar.rs

@@ -2,9 +2,8 @@
 mod tests;
 
 use crate::fmt;
-use crate::sync::{mutex, MutexGuard, PoisonError};
+use crate::sync::{mutex, poison, LockResult, MutexGuard, PoisonError};
 use crate::sys_common::condvar as sys;
-use crate::sys_common::poison::{self, LockResult};
 use crate::time::{Duration, Instant};
 
 /// A type indicating whether a timed wait on a condition variable returned

library/std/src/sync/mod.rs

@@ -166,9 +166,9 @@ pub use self::mutex::{Mutex, MutexGuard};
 #[allow(deprecated)]
 pub use self::once::{Once, OnceState, ONCE_INIT};
 #[stable(feature = "rust1", since = "1.0.0")]
-pub use self::rwlock::{RwLock, RwLockReadGuard, RwLockWriteGuard};
+pub use self::poison::{LockResult, PoisonError, TryLockError, TryLockResult};
 #[stable(feature = "rust1", since = "1.0.0")]
-pub use crate::sys_common::poison::{LockResult, PoisonError, TryLockError, TryLockResult};
+pub use self::rwlock::{RwLock, RwLockReadGuard, RwLockWriteGuard};
 
 pub mod mpsc;
 
@@ -176,4 +176,5 @@ mod barrier;
 mod condvar;
 mod mutex;
 mod once;
+mod poison;
 mod rwlock;

library/std/src/sync/mutex.rs

@@ -6,8 +6,8 @@ use crate::fmt;
 use crate::mem;
 use crate::ops::{Deref, DerefMut};
 use crate::ptr;
+use crate::sync::{poison, LockResult, TryLockError, TryLockResult};
 use crate::sys_common::mutex as sys;
-use crate::sys_common::poison::{self, LockResult, TryLockError, TryLockResult};
 
 /// A mutual exclusion primitive useful for protecting shared data
 ///

library/std/src/sync/poison.rs

@@ -3,9 +3,6 @@ use crate::fmt;
 use crate::sync::atomic::{AtomicBool, Ordering};
 use crate::thread;
 
-#[allow(unused_imports)] // for intra-doc links
-use crate::sync::{Mutex, RwLock};
-
 pub struct Flag {
     failed: AtomicBool,
 }
@@ -80,6 +77,8 @@ pub struct Guard {
 ///     }
 /// };
 /// ```
+/// [`Mutex`]: crate::sync::Mutex
+/// [`RwLock`]: crate::sync::RwLock
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct PoisonError<T> {
     guard: T,
@@ -89,9 +88,11 @@ pub struct PoisonError<T> {
 /// can occur while trying to acquire a lock, from the [`try_lock`] method on a
 /// [`Mutex`] or the [`try_read`] and [`try_write`] methods on an [`RwLock`].
 ///
-/// [`try_lock`]: Mutex::try_lock
+/// [`try_lock`]: crate::sync::Mutex::try_lock
-/// [`try_read`]: RwLock::try_read
+/// [`try_read`]: crate::sync::RwLock::try_read
-/// [`try_write`]: RwLock::try_write
+/// [`try_write`]: crate::sync::RwLock::try_write
+/// [`Mutex`]: crate::sync::Mutex
+/// [`RwLock`]: crate::sync::RwLock
 #[stable(feature = "rust1", since = "1.0.0")]
 pub enum TryLockError<T> {
     /// The lock could not be acquired because another thread failed while holding
@@ -149,7 +150,8 @@ impl<T> Error for PoisonError<T> {
 impl<T> PoisonError<T> {
     /// Creates a `PoisonError`.
     ///
-    /// This is generally created by methods like [`Mutex::lock`] or [`RwLock::read`].
+    /// This is generally created by methods like [`Mutex::lock`](crate::sync::Mutex::lock)
+    /// or [`RwLock::read`](crate::sync::RwLock::read).
     #[stable(feature = "sync_poison", since = "1.2.0")]
     pub fn new(guard: T) -> PoisonError<T> {
         PoisonError { guard }

library/std/src/sync/rwlock.rs

@@ -6,7 +6,7 @@ use crate::fmt;
 use crate::mem;
 use crate::ops::{Deref, DerefMut};
 use crate::ptr;
-use crate::sys_common::poison::{self, LockResult, TryLockError, TryLockResult};
+use crate::sync::{poison, LockResult, TryLockError, TryLockResult};
 use crate::sys_common::rwlock as sys;
 
 /// A reader-writer lock

library/std/src/sys_common/mod.rs

@@ -59,7 +59,6 @@ pub mod mutex;
 // when generating documentation.
 #[cfg(any(doc, not(windows)))]
 pub mod os_str_bytes;
-pub mod poison;
 pub mod process;
 pub mod remutex;
 pub mod rwlock;

src/doc/rustc/src/platform-support.md

@@ -179,7 +179,7 @@ target | std | host | notes
 `i386-apple-ios` | ✓ |  | 32-bit x86 iOS
 `i686-apple-darwin` | ✓ | ✓ | 32-bit macOS (10.7+, Lion+)
 `i686-pc-windows-msvc` | ✓ |  | 32-bit Windows XP support
-`i686-unknown-uefi` | ? |  | 32-bit UEFI
+`i686-unknown-uefi` | * |  | 32-bit UEFI
 `i686-unknown-haiku` | ✓ | ✓ | 32-bit Haiku
 `i686-unknown-netbsd` | ✓ | ✓ | NetBSD/i386 with SSE2
 `i686-unknown-openbsd` | ✓ | ✓ | 32-bit OpenBSD
@@ -228,7 +228,7 @@ target | std | host | notes
 `x86_64-unknown-none-hermitkernel` | ? |  | HermitCore kernel
 `x86_64-unknown-l4re-uclibc` | ? |  |
 `x86_64-unknown-openbsd` | ✓ | ✓ | 64-bit OpenBSD
-`x86_64-unknown-uefi` | ? |  |
+`x86_64-unknown-uefi` | * |  | 64-bit UEFI
 `x86_64-uwp-windows-gnu` | ✓ |  |
 `x86_64-uwp-windows-msvc` | ✓ |  |
 `x86_64-wrs-vxworks` | ? |  |

src/librustdoc/html/render/print_item.rs

@@ -963,6 +963,7 @@ fn item_enum(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, e: &clean::Enum
 
             use crate::clean::Variant;
             if let clean::VariantItem(Variant::Struct(ref s)) = *variant.kind {
+                toggle_open(w, "fields");
                 let variant_id = cx.derive_id(format!(
                     "{}.{}.fields",
                     ItemType::Variant,
@@ -996,6 +997,7 @@ fn item_enum(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, e: &clean::Enum
                     }
                 }
                 w.write_str("</div></div>");
+                toggle_close(w);
             }
             render_stability_since(w, variant, it, cx.tcx());
         }

src/librustdoc/html/static/main.js

@@ -455,6 +455,15 @@ function hideThemeButtonState() {
         handleHashes(ev);
     }
 
+    function openParentDetails(elem) {
+        while (elem) {
+            if (elem.tagName === "DETAILS") {
+                elem.open = true;
+            }
+            elem = elem.parentNode;
+        }
+    }
+
     function expandSection(id) {
         var elem = document.getElementById(id);
         if (elem && isHidden(elem)) {
@@ -469,6 +478,8 @@ function hideThemeButtonState() {
                     // The element is not visible, we need to make it appear!
                     collapseDocs(collapses[0], "show");
                 }
+                // Open all ancestor <details> to make this element visible.
+                openParentDetails(h3.parentNode);
             }
         }
     }
@@ -1009,7 +1020,7 @@ function hideThemeButtonState() {
             if (hasClass(relatedDoc, "item-info")) {
                 relatedDoc = relatedDoc.nextElementSibling;
             }
-            if (hasClass(relatedDoc, "docblock") || hasClass(relatedDoc, "sub-variant")) {
+            if (hasClass(relatedDoc, "docblock")) {
                 if (mode === "toggle") {
                     if (hasClass(relatedDoc, "hidden-by-usual-hider")) {
                         action = "show";
@@ -1318,8 +1329,6 @@ function hideThemeButtonState() {
                 if (hasClass(e, "type-decl")) {
                     // We do something special for these
                     return;
-                } else if (hasClass(e, "sub-variant")) {
-                    otherMessage = "&nbsp;Show&nbsp;fields";
                 } else if (hasClass(e, "non-exhaustive")) {
                     otherMessage = "&nbsp;This&nbsp;";
                     if (hasClass(e, "non-exhaustive-struct")) {
@@ -1351,7 +1360,6 @@ function hideThemeButtonState() {
         }
 
         onEachLazy(document.getElementsByClassName("docblock"), buildToggleWrapper);
-        onEachLazy(document.getElementsByClassName("sub-variant"), buildToggleWrapper);
 
         autoCollapse(getSettingValue("collapse") === "true");
 

src/librustdoc/html/static/rustdoc.css

@@ -1046,10 +1046,11 @@ h3 > .collapse-toggle, h4 > .collapse-toggle {
 }
 
 .sub-variant, .sub-variant > h3 {
-	margin-top: 1px !important;
+	margin-top: 0px !important;
+	padding-top: 1px;
 }
 
-#main > .sub-variant > h3 {
+#main > details > .sub-variant > h3 {
 	font-size: 15px;
 	margin-left: 25px;
 	margin-bottom: 5px;

src/librustdoc/html/static/search.js

@@ -935,6 +935,9 @@ window.initSearch = function(rawSearchIndex) {
                 });
                 current += 1;
             });
+            var SHIFT = 16;
+            var CTRL = 17;
+            var ALT = 18;
 
             var currentTab = searchState.currentTab;
             if (e.which === 38) { // up
@@ -967,10 +970,10 @@ window.initSearch = function(rawSearchIndex) {
                 e.preventDefault();
             } else if (e.which === 13) { // return
                 if (actives[currentTab].length) {
-                    document.location.href =
+                    var elem = actives[currentTab][0].getElementsByTagName("a")[0];
-                        actives[currentTab][0].getElementsByTagName("a")[0].href;
+                    document.location.href = elem.href;
                 }
-            } else if (e.which === 16) { // shift
+            } else if ([SHIFT, CTRL, ALT].indexOf(e.which) !== -1) {
                 // Does nothing, it's just to avoid losing "focus" on the highlighted element.
             } else if (actives[currentTab].length > 0) {
                 removeClass(actives[currentTab][0], "highlighted");

src/test/rustdoc-gui/lib.rs

@@ -29,7 +29,9 @@ pub struct Foo;
 
 impl Foo {
     #[must_use]
-    pub fn must_use(&self) -> bool { true }
+    pub fn must_use(&self) -> bool {
+        true
+    }
 }
 
 /// Just a normal enum.
@@ -85,3 +87,7 @@ pub trait AnotherOne {
 /// let x = 12;
 /// ```
 pub fn check_list_code_block() {}
+
+pub enum AnEnum {
+    WithVariants { and: usize, sub: usize, variants: usize },
+}

src/test/rustdoc/item-hide-threshold.rs

@@ -62,7 +62,8 @@ pub struct PrivStruct {
 }
 
 // @has 'item_hide_threshold/enum.Enum.html'
-// @count - '//details[@class="rustdoc-toggle type-contents-toggle"]' 0
+// @count - '//details[@class="rustdoc-toggle type-contents-toggle"]' 1
+// @has - '//details[@class="rustdoc-toggle type-contents-toggle"]' 'Show fields'
 pub enum Enum {
     A, B, C,
     D {

src/tools/rust-analyzer

@@ -1 +1 @@
-Subproject commit 7be06139b632ee615fc18af04dd67947e2c794b2
+Subproject commit 7570212a544b8e973a7d57be3657aae6465028a7