stub out trait aliases in save_analysis

Author: durka

src/librustc_save_analysis/dump_visitor.rs

@@ -285,6 +285,7 @@ impl<'l, 'tcx: 'l, 'll, O: DumpOutput + 'll> DumpVisitor<'l, 'tcx, 'll, O> {
  HirDef::Enum(..) |
  HirDef::TyAlias(..) |
  HirDef::TyForeign(..) |
+ HirDef::TraitAlias(..) |
  HirDef::Trait(_) => {
  let span = self.span_from_span(sub_span.expect("No span found for type ref"));
  self.dumper.dump_ref(Ref {

src/librustc_save_analysis/lib.rs

@@ -721,6 +721,7 @@ impl<'l, 'tcx: 'l> SaveContext<'l, 'tcx> {
  HirDef::Enum(def_id) |
  HirDef::TyAlias(def_id) |
  HirDef::TyForeign(def_id) |
+ HirDef::TraitAlias(def_id) |
  HirDef::AssociatedTy(def_id) |
  HirDef::Trait(def_id) |
  HirDef::TyParam(def_id) => {

src/librustc_save_analysis/sig.rs

@@ -487,6 +487,25 @@ impl Sig for ast::Item {
 
  Ok(sig)
  }
+ ast::ItemKind::TraitAlias(ref generics, ref bounds) => {
+ let mut text = String::new();
+ text.push_str("trait ");
+ let mut sig = name_and_generics(text,
+ offset,
+ generics,
+ self.id,
+ self.ident,
+ scx)?;
+
+ if !bounds.is_empty() {
+ sig.text.push_str(" = ");
+ sig.text.push_str(&pprust::bounds_to_string(bounds));
+ }
+ // FIXME where clause
+ sig.text.push_str(";");
+
+ Ok(sig)
+ }
  ast::ItemKind::AutoImpl(unsafety, ref trait_ref) => {
  let mut text = String::new();
  if unsafety == ast::Unsafety::Unsafe {