From bd0cb1ee98ef0d29741c3680666a62b7dba2ab6e Mon Sep 17 00:00:00 2001
From: Omid Rad <omidmr@gmail.com>
Date: Tue, 17 Oct 2023 23:03:55 +0200
Subject: [PATCH] Mark the "#[default]" variant for enums

---
 src/librustdoc/html/render/print_item.rs | 3 +++
 tests/rustdoc/attributes.rs              | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/src/librustdoc/html/render/print_item.rs b/src/librustdoc/html/render/print_item.rs
index f6432dc61ae06..f0b53259b5cb8 100644
--- a/src/librustdoc/html/render/print_item.rs
+++ b/src/librustdoc/html/render/print_item.rs
@@ -1618,6 +1618,9 @@ fn item_variants(
         if let clean::VariantKind::Tuple(ref s) = variant_data.kind {
             write!(w, "({})", print_tuple_struct_fields(cx, s));
         }
+        if variant.attrs.other_attrs.iter().any(|a| a.has_name(kw::Default)) {
+            w.write_str(" <span class=\"stab default\">Default</span>");
+        }
         w.write_str("</h3></section>");
 
         let heading_and_fields = match &variant_data.kind {
diff --git a/tests/rustdoc/attributes.rs b/tests/rustdoc/attributes.rs
index 86333c7534a3f..809c621740366 100644
--- a/tests/rustdoc/attributes.rs
+++ b/tests/rustdoc/attributes.rs
@@ -11,3 +11,11 @@ pub extern "C" fn g() {}
 // @has foo/struct.Repr.html '//pre[@class="rust item-decl"]' '#[repr(C, align(8))]'
 #[repr(C, align(8))]
 pub struct Repr;
+
+// @has foo/enum.Enum.html '//section[@id="variant.Foo"]' 'Default'
+#[derive(Default)]
+pub enum Enum {
+    #[default]
+    Foo,
+    Bar,
+}