[index] Add indexing for unresolved-using declarations

In dependent contexts we end up referencing these, so make sure they
have USRs, and have their declarations indexed. For the most part they
behave like typedefs, but we also need to worry about having multiple
using declarations with the same "name".

rdar://problem/33883650

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@311053 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/Index/IndexDecl.cpp b/lib/Index/IndexDecl.cpp
index fe6beef670..ee28ef737d 100644
--- a/lib/Index/IndexDecl.cpp
+++ b/lib/Index/IndexDecl.cpp
@@ -611,6 +611,24 @@ public:
                                     SymbolRoleSet());
   }
 
+  bool VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D) {
+    TRY_DECL(D, IndexCtx.handleDecl(D));
+    const DeclContext *DC = D->getDeclContext()->getRedeclContext();
+    const NamedDecl *Parent = dyn_cast<NamedDecl>(DC);
+    IndexCtx.indexNestedNameSpecifierLoc(D->getQualifierLoc(), Parent,
+                                         D->getLexicalDeclContext());
+    return true;
+  }
+
+  bool VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D) {
+    TRY_DECL(D, IndexCtx.handleDecl(D));
+    const DeclContext *DC = D->getDeclContext()->getRedeclContext();
+    const NamedDecl *Parent = dyn_cast<NamedDecl>(DC);
+    IndexCtx.indexNestedNameSpecifierLoc(D->getQualifierLoc(), Parent,
+                                         D->getLexicalDeclContext());
+    return true;
+  }
+
   bool VisitClassTemplateSpecializationDecl(const
                                            ClassTemplateSpecializationDecl *D) {
     // FIXME: Notify subsequent callbacks if info comes from implicit