librustc: Implement associated types behind a feature gate.

The implementation essentially desugars during type collection and AST
type conversion time into the parameter scheme we have now. Only fully
qualified names--e.g. `<T as Foo>::Bar`--are supported.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/libsyntax/config.rs b/src/libsyntax/config.rs
index cb96cd911b5..3b250de8701 100644
--- a/src/libsyntax/config.rs
+++ b/src/libsyntax/config.rs
@@ -235,13 +235,15 @@ fn view_item_in_cfg(cx: &mut Context, item: &ast::ViewItem) -> bool {
 fn trait_method_in_cfg(cx: &mut Context, meth: &ast::TraitItem) -> bool {
     match *meth {
         ast::RequiredMethod(ref meth) => (cx.in_cfg)(meth.attrs.as_slice()),
-        ast::ProvidedMethod(ref meth) => (cx.in_cfg)(meth.attrs.as_slice())
+        ast::ProvidedMethod(ref meth) => (cx.in_cfg)(meth.attrs.as_slice()),
+        ast::TypeTraitItem(ref typ) => (cx.in_cfg)(typ.attrs.as_slice()),
     }
 }
 
 fn impl_item_in_cfg(cx: &mut Context, impl_item: &ast::ImplItem) -> bool {
     match *impl_item {
         ast::MethodImplItem(ref meth) => (cx.in_cfg)(meth.attrs.as_slice()),
+        ast::TypeImplItem(ref typ) => (cx.in_cfg)(typ.attrs.as_slice()),
     }
 }