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 (:arrow_up: 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

8 files changed, 51 insertions, 31 deletions

diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index f352746d3fb..25b56b96ed2 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/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` | ? |  |
diff --git a/src/librustdoc/html/render/print_item.rs b/src/librustdoc/html/render/print_item.rs
index a303ca956d8..9d7d8a7cb8a 100644
--- a/src/librustdoc/html/render/print_item.rs
+++ b/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());
         }
diff --git a/src/librustdoc/html/static/main.js b/src/librustdoc/html/static/main.js
index be8d0a5996f..5dfc206eb2e 100644
--- a/src/librustdoc/html/static/main.js
+++ b/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");
 
diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index 213ca9ec9e3..44fb531100a 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/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;
diff --git a/src/librustdoc/html/static/search.js b/src/librustdoc/html/static/search.js
index eb232a96081..9fab435de49 100644
--- a/src/librustdoc/html/static/search.js
+++ b/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 =
-                        actives[currentTab][0].getElementsByTagName("a")[0].href;
+                    var elem = actives[currentTab][0].getElementsByTagName("a")[0];
+                    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");
diff --git a/src/test/rustdoc-gui/lib.rs b/src/test/rustdoc-gui/lib.rs
index c1e161e1235..eeba3e3f907 100644
--- a/src/test/rustdoc-gui/lib.rs
+++ b/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 },
+}
diff --git a/src/test/rustdoc/item-hide-threshold.rs b/src/test/rustdoc/item-hide-threshold.rs
index 616eef95662..8986f72636a 100644
--- a/src/test/rustdoc/item-hide-threshold.rs
+++ b/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 {
diff --git a/src/tools/rust-analyzer b/src/tools/rust-analyzer
-Subproject 7be06139b632ee615fc18af04dd67947e2c794b
+Subproject 7570212a544b8e973a7d57be3657aae6465028a