Revert "[c++1z] P0195R2: Support pack-expansion of using-declarations."

This reverts commit r290080 as it leads to many Clang crashes, e.g.:
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-quick/builds/1814

llvm-svn: 290092

1 files changed, 11 insertions, 8 deletions

diff --git a/clang/lib/Sema/SemaTemplateVariadic.cpp b/clang/lib/Sema/SemaTemplateVariadic.cpp
index 54556b505ee..c8bc2c38809 100644
--- a/clang/lib/Sema/SemaTemplateVariadic.cpp
+++ b/clang/lib/Sema/SemaTemplateVariadic.cpp
@@ -390,18 +390,21 @@ void Sema::collectUnexpandedParameterPacks(QualType T,
 void Sema::collectUnexpandedParameterPacks(TypeLoc TL,
                    SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
   CollectUnexpandedParameterPacksVisitor(Unexpanded).TraverseTypeLoc(TL);  
-}
+}  
 
-void Sema::collectUnexpandedParameterPacks(
-    NestedNameSpecifierLoc NNS,
-    SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
+void Sema::collectUnexpandedParameterPacks(CXXScopeSpec &SS,
+                                           SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
+  NestedNameSpecifier *Qualifier = SS.getScopeRep();
+  if (!Qualifier)
+    return;
+  
+  NestedNameSpecifierLoc QualifierLoc(Qualifier, SS.location_data());
   CollectUnexpandedParameterPacksVisitor(Unexpanded)
-      .TraverseNestedNameSpecifierLoc(NNS);
+    .TraverseNestedNameSpecifierLoc(QualifierLoc);
 }
 
-void Sema::collectUnexpandedParameterPacks(
-    const DeclarationNameInfo &NameInfo,
-    SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
+void Sema::collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo,
+                         SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
   CollectUnexpandedParameterPacksVisitor(Unexpanded)
     .TraverseDeclarationNameInfo(NameInfo);
 }