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#ifdef BE_THE_HEADER
11
12#pragma clang system_header
13
14namespace std {
15  namespace __atomic0 {
16    typedef int foobar;
17  }
18  namespace __atomic1 {
19    typedef void foobar;
20  }
21
22  inline namespace __atomic0 {}
23}
24
25#else
26
27#define BE_THE_HEADER
28#include "libstdcxx_atomic_ns_hack.cpp"
29
30std::foobar fb;
31
32using T = void; // expected-note {{here}}
33using T = std::foobar; // expected-error {{different types ('std::foobar' (aka 'int') vs 'void')}}
34
35#endif
36