Rollup merge of #42286 - ollie27:rustdoc_assoc_const, r=GuillaumeGomez

rustdoc: Cleanup associated const value rendering

Rather than (ab)using Debug for outputting the type in plain text use the
alternate format parameter which already does exactly that. This fixes
type parameters for example which would output raw HTML.

Also cleans up adding parens around references to trait objects.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/test/rustdoc/assoc-consts.rs b/src/test/rustdoc/assoc-consts.rs
index d4119f5d351..04709407e58 100644
--- a/src/test/rustdoc/assoc-consts.rs
+++ b/src/test/rustdoc/assoc-consts.rs
@@ -26,3 +26,21 @@ impl Bar {
     // @has - '//*[@class="docblock"]' 'BAR: usize = 3'
     pub const BAR: usize = 3;
 }
+
+pub struct Baz<'a, U: 'a, T>(T, &'a [U]);
+
+impl Bar {
+    // @has assoc_consts/struct.Bar.html '//*[@id="associatedconstant.BAZ"]' \
+    //      "const BAZ: Baz<'static, u8, u32>"
+    // @has - '//*[@class="docblock"]' "BAZ: Baz<'static, u8, u32> = Baz(321, &[1, 2, 3])"
+    pub const BAZ: Baz<'static, u8, u32> = Baz(321, &[1, 2, 3]);
+}
+
+pub fn f(_: &(ToString + 'static)) {}
+
+impl Bar {
+    // @has assoc_consts/struct.Bar.html '//*[@id="associatedconstant.F"]' \
+    //      "const F: fn(_: &(ToString + 'static))"
+    // @has - '//*[@class="docblock"]' "F: fn(_: &(ToString + 'static)) = f"
+    pub const F: fn(_: &(ToString + 'static)) = f;
+}