From 36981b17ed939300f6f8fc2355a255f711fcef71 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Thu, 20 Oct 2011 21:14:49 +0000
Subject: Vendor import of clang release_30 branch r142614:
 http://llvm.org/svn/llvm-project/cfe/branches/release_30@142614

---
 lib/Sema/SemaCXXScopeSpec.cpp | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

(limited to 'lib/Sema/SemaCXXScopeSpec.cpp')

diff --git a/lib/Sema/SemaCXXScopeSpec.cpp b/lib/Sema/SemaCXXScopeSpec.cpp
index 5f8c9c62a4092..360a0404b8f4e 100644
--- a/lib/Sema/SemaCXXScopeSpec.cpp
+++ b/lib/Sema/SemaCXXScopeSpec.cpp
@@ -137,8 +137,7 @@ DeclContext *Sema::computeDeclContext(const CXXScopeSpec &SS,
 
   switch (NNS->getKind()) {
   case NestedNameSpecifier::Identifier:
-    assert(false && "Dependent nested-name-specifier has no DeclContext");
-    break;
+    llvm_unreachable("Dependent nested-name-specifier has no DeclContext");
 
   case NestedNameSpecifier::Namespace:
     return NNS->getAsNamespace();
@@ -238,7 +237,7 @@ bool Sema::RequireCompleteDeclContext(CXXScopeSpec &SS,
     // until we see a definition, so awkwardly pull out this special
     // case.
     if (const EnumType *enumType = dyn_cast_or_null<EnumType>(tagType)) {
-      if (!enumType->getDecl()->isDefinition()) {
+      if (!enumType->getDecl()->isCompleteDefinition()) {
         Diag(loc, diag::err_incomplete_nested_name_spec)
           << type << SS.getRange();
         SS.SetInvalid(SS.getRange());
@@ -615,6 +614,31 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S,
     LookupName(Found, S);
   }
 
+  // In Microsoft mode, if we are within a templated function and we can't
+  // resolve Identifier, then extend the SS with Identifier. This will have 
+  // the effect of resolving Identifier during template instantiation. 
+  // The goal is to be able to resolve a function call whose
+  // nested-name-specifier is located inside a dependent base class.
+  // Example: 
+  //
+  // class C {
+  // public:
+  //    static void foo2() {  }
+  // };
+  // template <class T> class A { public: typedef C D; };
+  //
+  // template <class T> class B : public A<T> {
+  // public:
+  //   void foo() { D::foo2(); }
+  // };
+  if (getLangOptions().MicrosoftExt) {
+    DeclContext *DC = LookupCtx ? LookupCtx : CurContext;
+    if (DC->isDependentContext() && DC->isFunctionOrMethod()) {
+      SS.Extend(Context, &Identifier, IdentifierLoc, CCLoc);
+      return false;
+    }
+  }
+
   unsigned DiagID;
   if (!Found.empty())
     DiagID = diag::err_expected_class_or_namespace;
-- 
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