-ms-extensions: Implement __super scope specifier (PR13236).

We build a NestedNameSpecifier that records the CXXRecordDecl in which
__super appeared. Name lookup is performed in all base classes of the
recorded CXXRecordDecl. Use of __super is allowed only inside class and
member function scope.

llvm-svn: 218484

1 files changed, 8 insertions, 1 deletions

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 1bac28753fe..abbf4b2bb24 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -498,6 +498,9 @@ DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) {
 /// @endcode
 bool Sema::isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S) {
   if (CurContext->isRecord()) {
+    if (SS->getScopeRep()->getKind() == NestedNameSpecifier::Super)
+      return true;
+
     const Type *Ty = SS->getScopeRep()->getAsType();
 
     CXXRecordDecl *RD = cast<CXXRecordDecl>(CurContext);
@@ -699,7 +702,11 @@ Sema::NameClassification Sema::ClassifyName(Scope *S,
   }
 
   LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName);
-  LookupParsedName(Result, S, &SS, !CurMethod);
+  NestedNameSpecifier *NNS = SS.getScopeRep();
+  if (NNS && NNS->getKind() == NestedNameSpecifier::Super)
+    LookupInSuper(Result, NNS->getAsRecordDecl());
+  else
+    LookupParsedName(Result, S, &SS, !CurMethod);
 
   // For unqualified lookup in a class template in MSVC mode, look into
   // dependent base classes where the primary class template is known.