Add method visibility to CrateStore

src/librustc/middle/cstore.rs

@@ -137,6 +137,7 @@ pub trait CrateStore<'tcx> : Any {
     // item info
     fn stability(&self, def: DefId) -> Option<attr::Stability>;
     fn deprecation(&self, def: DefId) -> Option<attr::Deprecation>;
+    fn visibility(&self, def: DefId) -> hir::Visibility;
     fn closure_kind(&self, tcx: &TyCtxt<'tcx>, def_id: DefId)
                     -> ty::ClosureKind;
     fn closure_ty(&self, tcx: &TyCtxt<'tcx>, def_id: DefId)
@@ -302,6 +303,7 @@ impl<'tcx> CrateStore<'tcx> for DummyCrateStore {
     // item info
     fn stability(&self, def: DefId) -> Option<attr::Stability> { unimplemented!() }
     fn deprecation(&self, def: DefId) -> Option<attr::Deprecation> { unimplemented!() }
+    fn visibility(&self, def: DefId) -> hir::Visibility { unimplemented!() }
     fn closure_kind(&self, tcx: &TyCtxt<'tcx>, def_id: DefId)
                     -> ty::ClosureKind  { unimplemented!() }
     fn closure_ty(&self, tcx: &TyCtxt<'tcx>, def_id: DefId)

src/librustc_metadata/csearch.rs

@@ -49,6 +49,11 @@ impl<'tcx> CrateStore<'tcx> for cstore::CStore {
         decoder::get_deprecation(&cdata, def.index)
     }
 
+    fn visibility(&self, def: DefId) -> hir::Visibility {
+        let cdata = self.get_crate_data(def.krate);
+        decoder::get_visibility(&cdata, def.index)
+    }
+
     fn closure_kind(&self, _tcx: &TyCtxt<'tcx>, def_id: DefId) -> ty::ClosureKind
     {
         assert!(!def_id.is_local());

src/librustc_metadata/decoder.rs

@@ -545,6 +545,10 @@ pub fn get_deprecation(cdata: Cmd, id: DefIndex) -> Option<attr::Deprecation> {
     })
 }
 
+pub fn get_visibility(cdata: Cmd, id: DefIndex) -> hir::Visibility {
+    item_visibility(cdata.lookup_item(id))
+}
+
 pub fn get_repr_attrs(cdata: Cmd, id: DefIndex) -> Vec<attr::ReprAttr> {
     let item = cdata.lookup_item(id);
     match reader::maybe_get_doc(item, tag_items_data_item_repr).map(|doc| {