Implement the notions of the "current instantiation" and "unknown

specialization" within a C++ template, and permit name lookup into the
current instantiation. For example, given:

  template<typename T, typename U>
  struct X {
    typedef T type;

    X* x1;  // current instantiation
    X<T, U> *x2; // current instantiation
    X<U, T> *x3; // not current instantiation
    ::X<type, U> *x4; // current instantiation
    X<typename X<type, U>::type, U>: *x5; // current instantiation
  };

llvm-svn: 71471

1 files changed, 4 insertions, 3 deletions

diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index 621145f1af9..319d4d5756c 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -507,9 +507,10 @@ OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
 //===----------------------------------------------------------------------===//
 
 bool TagDecl::isDependentType() const {
-  if (isa<TemplateDecl>(this))
-    return true;
-
+  if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(this))
+    if (Record->getDescribedClassTemplate())
+      return true;
+    
   if (const TagDecl *TD = dyn_cast_or_null<TagDecl>(getDeclContext()))
     return TD->isDependentType();