rustdoc: Render associated types on traits and impls

src/librustdoc/clean/mod.rs

@@ -336,7 +336,7 @@ pub enum ItemEnum {
     ForeignStaticItem(Static),
     MacroItem(Macro),
     PrimitiveItem(PrimitiveType),
-    AssociatedTypeItem,
+    AssociatedTypeItem(TyParam),
 }
 
 #[deriving(Clone, Encodable, Decodable)]
@@ -982,6 +982,8 @@ impl Clean<Type> for ast::PolyTraitRef {
     }
 }
 
+/// An item belonging to a trait, whether a method or associated. Could be named
+/// TraitItem except that's already taken by an exported enum variant.
 #[deriving(Clone, Encodable, Decodable)]
 pub enum TraitMethod {
     RequiredMethod(Item),
@@ -1002,6 +1004,12 @@ impl TraitMethod {
             _ => false,
         }
     }
+    pub fn is_type(&self) -> bool {
+        match self {
+            &TypeTraitItem(..) => true,
+            _ => false,
+        }
+    }
     pub fn item<'a>(&'a self) -> &'a Item {
         match *self {
             RequiredMethod(ref item) => item,
@@ -2211,7 +2219,7 @@ impl Clean<Item> for ast::AssociatedType {
             source: self.ty_param.span.clean(cx),
             name: Some(self.ty_param.ident.clean(cx)),
             attrs: self.attrs.clean(cx),
-            inner: AssociatedTypeItem,
+            inner: AssociatedTypeItem(self.ty_param.clean(cx)),
             visibility: None,
             def_id: ast_util::local_def(self.ty_param.id),
             stability: None,
@@ -2225,7 +2233,17 @@ impl Clean<Item> for ty::AssociatedType {
             source: DUMMY_SP.clean(cx),
             name: Some(self.name.clean(cx)),
             attrs: Vec::new(),
-            inner: AssociatedTypeItem,
+            // FIXME(#18048): this is wrong, but cross-crate associated types are broken
+            // anyway, for the time being.
+            inner: AssociatedTypeItem(TyParam {
+                name: self.name.clean(cx),
+                did: ast::DefId {
+                    krate: 0,
+                    node: ast::DUMMY_NODE_ID
+                },
+                bounds: vec![],
+                default: None
+            }),
             visibility: None,
             def_id: self.def_id,
             stability: None,