1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s 2 3 // libstdc++ 4.6.x contains a bug where it defines std::__atomic[0,1,2] as a 4 // non-inline namespace, then selects one of those namespaces and reopens it 5 // as inline, as a strange way of providing something like a using-directive. 6 // Clang has an egregious hack to work around the problem, by allowing a 7 // namespace to be converted from non-inline to inline in this one specific 8 // case. 9 10 // the last 4.6 release was 2013, so the hack is removed. This checks __atomic 11 // is not special. 12 #ifdef BE_THE_HEADER 13 14 #pragma clang system_header 15 16 namespace std { 17 namespace __atomic0 { // expected-note {{previous definition}} 18 typedef int foobar; 19 } // namespace __atomic0 20 namespace __atomic1 { 21 typedef void foobar; 22 } // namespace __atomic1 23 24 inline namespace __atomic0 {} // expected-error {{cannot be reopened as inline}} 25 } // namespace std 26 27 #else 28 29 #define BE_THE_HEADER 30 #include "libstdcxx_atomic_ns_hack.cpp" 31 32 std::foobar fb; // expected-error {{no type named 'foobar' in namespace}} 33 34 #endif 35