Auto merge of rust-lang#102121 - JohnTitor:rollup-3fb1wrt, r=JohnTitor

Rollup of 12 pull requests

Successful merges:

 - rust-lang#101952 (Avoid panicking on missing fallback)
 - rust-lang#102030 (Don't crate-locally reexport walk functions in tidy)
 - rust-lang#102032 (Adding ignore fuchsia tests for signal interpretation cases)
 - rust-lang#102033 (Adding needs-unwind to nicer-assert-messages compiler ui tests)
 - rust-lang#102054 (Unify "all items" page's sidebar with other pages)
 - rust-lang#102071 (Adding needs-unwind for tests testing memory size of Futures/Closures)
 - rust-lang#102073 (Adding ignore fuchsia tests for execvp)
 - rust-lang#102075 (rustdoc: remove no-op CSS `.content > .methods > .method`)
 - rust-lang#102079 (Update books)
 - rust-lang#102084 (Adding needs-unwind for test using panic::catch_unwind)
 - rust-lang#102100 (Prevent usage of .stab elements to create scrollable areas in doc blocks)
 - rust-lang#102102 (Add doc aliases on Sized trait)

Failed merges:

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

Author: bors

library/core/src/marker.rs

@@ -81,6 +81,7 @@ impl<T: ?Sized> !Send for *mut T {}
 /// ```
 ///
 /// [trait object]: ../../book/ch17-02-trait-objects.html
+#[doc(alias = "?", alias = "?Sized")]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[lang = "sized"]
 #[rustc_on_unimplemented(

src/doc/book

@@ -17,8 +17,8 @@ use super::print_item::{full_path, item_path, print_item};
 use super::search_index::build_index;
 use super::write_shared::write_shared;
 use super::{
-    collect_spans_and_sources, print_sidebar, scrape_examples_help, AllTypes, LinkFromSrc, NameDoc,
-    StylePath, BASIC_KEYWORDS,
+    collect_spans_and_sources, print_sidebar, scrape_examples_help, sidebar_module_like, AllTypes,
+    LinkFromSrc, NameDoc, StylePath, BASIC_KEYWORDS,
 };
 
 use crate::clean::{self, types::ExternalLocation, ExternalCrate};
@@ -597,16 +597,24 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             keywords: BASIC_KEYWORDS,
             resource_suffix: &shared.resource_suffix,
         };
-        let sidebar = if shared.cache.crate_version.is_some() {
-            format!("<h2 class=\"location\">Crate {}</h2>", crate_name)
-        } else {
-            String::new()
-        };
         let all = shared.all.replace(AllTypes::new());
+        let mut sidebar = Buffer::html();
+        if shared.cache.crate_version.is_some() {
+            write!(sidebar, "<h2 class=\"location\">Crate {}</h2>", crate_name)
+        };
+
+        let mut items = Buffer::html();
+        sidebar_module_like(&mut items, all.item_sections());
+        if !items.is_empty() {
+            sidebar.push_str("<div class=\"sidebar-elems\">");
+            sidebar.push_buffer(items);
+            sidebar.push_str("</div>");
+        }
+
         let v = layout::render(
             &shared.layout,
             &page,
-            sidebar,
+            sidebar.into_inner(),
             |buf: &mut Buffer| all.print(buf),
             &shared.style_files,
         );

src/doc/embedded-book

@@ -290,19 +290,66 @@ impl AllTypes {
             };
         }
     }
-}
 
-impl AllTypes {
+    fn item_sections(&self) -> FxHashSet<ItemSection> {
+        let mut sections = FxHashSet::default();
+
+        if !self.structs.is_empty() {
+            sections.insert(ItemSection::Structs);
+        }
+        if !self.enums.is_empty() {
+            sections.insert(ItemSection::Enums);
+        }
+        if !self.unions.is_empty() {
+            sections.insert(ItemSection::Unions);
+        }
+        if !self.primitives.is_empty() {
+            sections.insert(ItemSection::PrimitiveTypes);
+        }
+        if !self.traits.is_empty() {
+            sections.insert(ItemSection::Traits);
+        }
+        if !self.macros.is_empty() {
+            sections.insert(ItemSection::Macros);
+        }
+        if !self.functions.is_empty() {
+            sections.insert(ItemSection::Functions);
+        }
+        if !self.typedefs.is_empty() {
+            sections.insert(ItemSection::TypeDefinitions);
+        }
+        if !self.opaque_tys.is_empty() {
+            sections.insert(ItemSection::OpaqueTypes);
+        }
+        if !self.statics.is_empty() {
+            sections.insert(ItemSection::Statics);
+        }
+        if !self.constants.is_empty() {
+            sections.insert(ItemSection::Constants);
+        }
+        if !self.attributes.is_empty() {
+            sections.insert(ItemSection::AttributeMacros);
+        }
+        if !self.derives.is_empty() {
+            sections.insert(ItemSection::DeriveMacros);
+        }
+        if !self.trait_aliases.is_empty() {
+            sections.insert(ItemSection::TraitAliases);
+        }
+
+        sections
+    }
+
     fn print(self, f: &mut Buffer) {
-        fn print_entries(f: &mut Buffer, e: &FxHashSet<ItemEntry>, title: &str) {
+        fn print_entries(f: &mut Buffer, e: &FxHashSet<ItemEntry>, kind: ItemSection) {
             if !e.is_empty() {
                 let mut e: Vec<&ItemEntry> = e.iter().collect();
                 e.sort();
                 write!(
                     f,
-                    "<h3 id=\"{}\">{}</h3><ul class=\"all-items\">",
-                    title.replace(' ', "-"), // IDs cannot contain whitespaces.
-                    title
+                    "<h3 id=\"{id}\">{title}</h3><ul class=\"all-items\">",
+                    id = kind.id(),
+                    title = kind.name(),
                 );
 
                 for s in e.iter() {
@@ -320,20 +367,20 @@ impl AllTypes {
         );
         // Note: print_entries does not escape the title, because we know the current set of titles
         // doesn't require escaping.
-        print_entries(f, &self.structs, "Structs");
-        print_entries(f, &self.enums, "Enums");
-        print_entries(f, &self.unions, "Unions");
-        print_entries(f, &self.primitives, "Primitives");
-        print_entries(f, &self.traits, "Traits");
-        print_entries(f, &self.macros, "Macros");
-        print_entries(f, &self.attributes, "Attribute Macros");
-        print_entries(f, &self.derives, "Derive Macros");
-        print_entries(f, &self.functions, "Functions");
-        print_entries(f, &self.typedefs, "Typedefs");
-        print_entries(f, &self.trait_aliases, "Trait Aliases");
-        print_entries(f, &self.opaque_tys, "Opaque Types");
-        print_entries(f, &self.statics, "Statics");
-        print_entries(f, &self.constants, "Constants");
+        print_entries(f, &self.structs, ItemSection::Structs);
+        print_entries(f, &self.enums, ItemSection::Enums);
+        print_entries(f, &self.unions, ItemSection::Unions);
+        print_entries(f, &self.primitives, ItemSection::PrimitiveTypes);
+        print_entries(f, &self.traits, ItemSection::Traits);
+        print_entries(f, &self.macros, ItemSection::Macros);
+        print_entries(f, &self.attributes, ItemSection::AttributeMacros);
+        print_entries(f, &self.derives, ItemSection::DeriveMacros);
+        print_entries(f, &self.functions, ItemSection::Functions);
+        print_entries(f, &self.typedefs, ItemSection::TypeDefinitions);
+        print_entries(f, &self.trait_aliases, ItemSection::TraitAliases);
+        print_entries(f, &self.opaque_tys, ItemSection::OpaqueTypes);
+        print_entries(f, &self.statics, ItemSection::Statics);
+        print_entries(f, &self.constants, ItemSection::Constants);
     }
 }
 
@@ -2468,7 +2515,7 @@ fn sidebar_enum(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item, e: &clean:
 }
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
-enum ItemSection {
+pub(crate) enum ItemSection {
     Reexports,
     PrimitiveTypes,
     Modules,
@@ -2620,25 +2667,11 @@ fn item_ty_to_section(ty: ItemType) -> ItemSection {
     }
 }
 
-fn sidebar_module(buf: &mut Buffer, items: &[clean::Item]) {
+pub(crate) fn sidebar_module_like(buf: &mut Buffer, item_sections_in_use: FxHashSet<ItemSection>) {
     use std::fmt::Write as _;
 
     let mut sidebar = String::new();
 
-    let item_sections_in_use: FxHashSet<_> = items
-        .iter()
-        .filter(|it| {
-            !it.is_stripped()
-                && it
-                    .name
-                    .or_else(|| {
-                        if let clean::ImportItem(ref i) = *it.kind &&
-                            let clean::ImportKind::Simple(s) = i.kind { Some(s) } else { None }
-                    })
-                    .is_some()
-        })
-        .map(|it| item_ty_to_section(it.type_()))
-        .collect();
     for &sec in ItemSection::ALL.iter().filter(|sec| item_sections_in_use.contains(sec)) {
         let _ = write!(sidebar, "<li><a href=\"#{}\">{}</a></li>", sec.id(), sec.name());
     }
@@ -2656,6 +2689,25 @@ fn sidebar_module(buf: &mut Buffer, items: &[clean::Item]) {
     }
 }
 
+fn sidebar_module(buf: &mut Buffer, items: &[clean::Item]) {
+    let item_sections_in_use: FxHashSet<_> = items
+        .iter()
+        .filter(|it| {
+            !it.is_stripped()
+                && it
+                    .name
+                    .or_else(|| {
+                        if let clean::ImportItem(ref i) = *it.kind &&
+                            let clean::ImportKind::Simple(s) = i.kind { Some(s) } else { None }
+                    })
+                    .is_some()
+        })
+        .map(|it| item_ty_to_section(it.type_()))
+        .collect();
+
+    sidebar_module_like(buf, item_sections_in_use);
+}
+
 fn sidebar_foreign_type(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item) {
     let mut sidebar = Buffer::new();
     sidebar_assoc_items(cx, &mut sidebar, it);

src/doc/nomicon

@@ -728,10 +728,6 @@ pre, .rustdoc.source .example-wrap {
 	padding: 0;
 }
 
-.content > .methods > .method {
-	font-size: 1rem;
-	position: relative;
-}
 /* Shift "where ..." part of method or fn definition down a line */
 .content .method .where,
 .content .fn .where,
@@ -1092,6 +1088,12 @@ so that we can apply CSS-filters to change the arrow color in themes */
 	margin-right: 0.3rem;
 }
 
+/* This is to prevent the `.stab` elements to overflow the .docblock elements. */
+.docblock .stab {
+	padding: 0 0.125em;
+	margin-bottom: 0;
+}
+
 /* Black one-pixel outline around emoji shapes */
 .emoji {
 	text-shadow: