rustdoc: Show type layout for type aliases

src/librustdoc/html/render/print_item.rs

@@ -976,6 +976,7 @@ fn item_typedef(
     // associated items from the aliased type (see discussion in #32077), but
     // we need #14072 to make sense of the generics.
     render_assoc_items(w, cx, it, def_id, AssocItemRender::All);
+    document_type_layout(w, cx, def_id);
 }
 
 fn item_union(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, s: &clean::Union) {

src/test/rustdoc/type-layout.rs

@@ -50,6 +50,18 @@ pub struct GenericLifetimes<'a>(&'a str);
 // @has - '(unsized)'
 pub struct Unsized([u8]);
 
+// @has type_layout/type.TypeAlias.html 'Size: '
+// @has - ' bytes'
+pub type TypeAlias = X;
+
+// @has type_layout/type.GenericTypeAlias.html 'Size: '
+// @has - '8 bytes'
+pub type GenericTypeAlias = (Generic<(u32, ())>, Generic<u32>);
+
+// Regression test for the rustdoc equivalent of #85103.
+// @has type_layout/type.Edges.html 'Encountered an error during type layout; the type failed to be normalized.'
+pub type Edges<'a, E> = std::borrow::Cow<'a, [E]>;
+
 // @!has type_layout/trait.MyTrait.html 'Size: '
 pub trait MyTrait {}