| 1 | // RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s |
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| 2 | |
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| 3 | // libstdc++ 4.6.x contains a bug where it defines std::__atomic[0,1,2] as a |
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| 4 | // non-inline namespace, then selects one of those namespaces and reopens it |
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| 5 | // as inline, as a strange way of providing something like a using-directive. |
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| 6 | // Clang has an egregious hack to work around the problem, by allowing a |
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| 7 | // namespace to be converted from non-inline to inline in this one specific |
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| 8 | // case. |
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| 9 | |
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| 10 | #ifdef BE_THE_HEADER |
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| 11 | |
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| 12 | #pragma clang system_header |
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| 13 | |
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| 14 | namespace std { |
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| 15 | namespace __atomic0 { |
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| 16 | typedef int foobar; |
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| 17 | } |
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| 18 | namespace __atomic1 { |
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| 19 | typedef void foobar; |
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| 20 | } |
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| 21 | |
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| 22 | inline namespace __atomic0 {} |
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| 23 | } |
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| 24 | |
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| 25 | #else |
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| 26 | |
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| 27 | #define BE_THE_HEADER |
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| 28 | #include "libstdcxx_atomic_ns_hack.cpp" |
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| 29 | |
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| 30 | std::foobar fb; |
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| 31 | |
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| 32 | using T = void; // expected-note {{here}} |
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| 33 | using T = std::foobar; // expected-error {{different types ('std::foobar' (aka 'int') vs 'void')}} |
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| 34 | |
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| 35 | #endif |
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| 36 | |
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