rustdoc: Promote impl descriptions to brief descriptions

src/rustdoc/desc_to_brief_pass.rs

@@ -23,7 +23,8 @@ fn run(
         fold_fn: fold_fn,
         fold_enum: fold_enum,
         fold_res: fold_res,
-        fold_iface: fold_iface
+        fold_iface: fold_iface,
+        fold_impl: fold_impl
         with *fold::default_seq_fold(())
     });
     fold.fold_crate(fold, doc)
@@ -104,6 +105,26 @@ fn fold_iface(fold: fold::fold<()>, doc: doc::ifacedoc) -> doc::ifacedoc {
     }
 }
 
+fn fold_impl(fold: fold::fold<()>, doc: doc::impldoc) -> doc::impldoc {
+    let doc =fold::default_seq_fold_impl(fold, doc);
+    let (brief, desc) = modify(doc.brief, doc.desc);
+
+    {
+        brief: brief,
+        desc: desc,
+        methods: vec::map(doc.methods) {|doc|
+            let (brief, desc) = modify(doc.brief, doc.desc);
+
+            {
+                brief: brief,
+                desc: desc
+                with doc
+            }
+        }
+        with doc
+    }
+}
+
 #[test]
 fn should_promote_mod_desc() {
     let doc = test::mk_doc("#[doc(desc = \"desc\")] mod m { }");
@@ -154,6 +175,22 @@ fn should_promote_iface_method_desc() {
     assert doc.topmod.ifaces()[0].methods[0].desc == none;
 }
 
+#[test]
+fn should_promote_impl_desc() {
+    let doc = test::mk_doc(
+        "#[doc(desc = \"desc\")] impl i for int { fn a() { } }");
+    assert doc.topmod.impls()[0].brief == some("desc");
+    assert doc.topmod.impls()[0].desc == none;
+}
+
+#[test]
+fn should_promote_impl_method_desc() {
+    let doc = test::mk_doc(
+        "impl i for int { #[doc(desc = \"desc\")] fn a() { } }");
+    assert doc.topmod.impls()[0].methods[0].brief == some("desc");
+    assert doc.topmod.impls()[0].methods[0].desc == none;
+}
+
 #[cfg(test)]
 mod test {
     fn mk_doc(source: str) -> doc::cratedoc {