Skip transparent contexts when performing C++ name lookup

llvm-svn: 79931

clang/lib/Sema/SemaLookup.cpp

@@ -755,6 +755,9 @@ Sema::CppLookupName(Scope *S, DeclarationName Name,
 
   for (; S; S = S->getParent()) {
     DeclContext *Ctx = static_cast<DeclContext *>(S->getEntity());
+    if (Ctx->isTransparentContext())
+      continue;
+
     assert(Ctx && Ctx->isFileContext() &&
            "We should have been looking only at file context here already.");
 

clang/test/SemaCXX/linkage-spec.cpp

@@ -25,3 +25,11 @@ extern "C" int const bar;
 // <rdar://problem/6895431>
 extern "C" struct bar d;
 extern struct bar e;
+
+extern "C++" {
+  namespace N0 {
+    struct X0 {
+      int foo(int x) { return x; }
+    };
+  }
+}