// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s // Classes. namespace Class { namespace NS { class C {}; // expected-note {{candidate}} } using namespace NS; class C : C {}; // expected-error {{reference to 'C' is ambiguous}} \ expected-note {{candidate}} } // Enumerations. enum E { EPtrSize = sizeof((E*)0) // ok, E is already declared }; // Alias declarations. clang implements the proposed resolution to N1044. namespace Alias { namespace NS { class C; } using namespace NS; using C = C; // ok, C = B::C using C = NS::C; // ok, same type }