Unify inherent impl blocks by wrapping them into a div

src/librustdoc/html/markdown.rs

@@ -1460,6 +1460,7 @@ fn init_id_map() -> FxHashMap<String, usize> {
     map.insert("provided-methods".to_owned(), 1);
     map.insert("implementors".to_owned(), 1);
     map.insert("synthetic-implementors".to_owned(), 1);
+    map.insert("implementations-list".to_owned(), 1);
     map.insert("trait-implementations-list".to_owned(), 1);
     map.insert("synthetic-implementations-list".to_owned(), 1);
     map.insert("blanket-implementations-list".to_owned(), 1);

src/librustdoc/html/render/mod.rs

@@ -1065,14 +1065,15 @@ fn render_assoc_items_inner(
     let (non_trait, traits): (Vec<_>, _) = v.iter().partition(|i| i.inner_impl().trait_.is_none());
     if !non_trait.is_empty() {
         let mut tmp_buf = Buffer::empty_from(w);
-        let render_mode = match what {
+        let (render_mode, id) = match what {
             AssocItemRender::All => {
                 tmp_buf.write_str(
                     "<h2 id=\"implementations\" class=\"small-section-header\">\
-                         Implementations<a href=\"#implementations\" class=\"anchor\"></a>\
+                         Implementations\
-                    </h2>",
+                         <a href=\"#implementations\" class=\"anchor\"></a>\
+                     </h2>",
                 );
-                RenderMode::Normal
+                (RenderMode::Normal, "implementations-list".to_owned())
             }
             AssocItemRender::DerefFor { trait_, type_, deref_mut_ } => {
                 let id =
@@ -1090,7 +1091,7 @@ fn render_assoc_items_inner(
                     trait_ = trait_.print(cx),
                     type_ = type_.print(cx),
                 );
-                RenderMode::ForDeref { mut_: deref_mut_ }
+                (RenderMode::ForDeref { mut_: deref_mut_ }, cx.derive_id(id))
             }
         };
         let mut impls_buf = Buffer::empty_from(w);
@@ -1115,7 +1116,9 @@ fn render_assoc_items_inner(
         }
         if !impls_buf.is_empty() {
             w.push_buffer(tmp_buf);
+            write!(w, "<div id=\"{}\">", id);
             w.push_buffer(impls_buf);
+            w.write_str("</div>");
         }
     }
 
@@ -1146,7 +1149,8 @@ fn render_assoc_items_inner(
             write!(
                 w,
                 "<h2 id=\"trait-implementations\" class=\"small-section-header\">\
-                     Trait Implementations<a href=\"#trait-implementations\" class=\"anchor\"></a>\
+                     Trait Implementations\
+                     <a href=\"#trait-implementations\" class=\"anchor\"></a>\
                  </h2>\
                  <div id=\"trait-implementations-list\">{}</div>",
                 impls

src/librustdoc/html/static/js/main.js

@@ -741,7 +741,7 @@ function hideThemeButtonState() {
         } else {
             addClass(innerToggle, "will-expand");
             onEachLazy(document.getElementsByClassName("rustdoc-toggle"), function(e) {
-                if (e.parentNode.id !== MAIN_ID ||
+                if (e.parentNode.id !== "implementations-list" ||
                     (!hasClass(e, "implementors-toggle") &&
                      !hasClass(e, "type-contents-toggle")))
                 {

src/test/rustdoc/duplicate_impls/issue-33054.rs

@@ -2,7 +2,7 @@
 // @has - '//h3[@class="code-header in-band"]' 'impl Foo'
 // @has - '//h3[@class="code-header in-band"]' 'impl Bar for Foo'
 // @count - '//*[@id="trait-implementations-list"]//*[@class="impl has-srclink"]' 1
-// @count - '//*[@id="main-content"]/details/summary/*[@class="impl has-srclink"]' 1
+// @count - '//*[@id="main-content"]/div[@id="implementations-list"]/details/summary/*[@class="impl has-srclink"]' 1
 // @has issue_33054/impls/bar/trait.Bar.html
 // @has - '//h3[@class="code-header in-band"]' 'impl Bar for Foo'
 // @count - '//*[@class="struct"]' 1