| 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
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| 2 | |
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| 3 | // This is a test for an egregious hack in Clang that works around |
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| 4 | // issues with GCC's evolution. libstdc++ 4.2.x uses __is_pod as an |
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| 5 | // identifier (to declare a struct template like the one below), while |
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| 6 | // GCC 4.3 and newer make __is_pod a keyword. Clang treats __is_pod as |
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| 7 | // a keyword *unless* it is introduced following the struct keyword. |
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| 8 | |
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| 9 | template<typename T> |
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| 10 | struct __is_pod { // expected-warning {{keyword '__is_pod' will be made available as an identifier}} |
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| 11 | __is_pod() {} |
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| 12 | }; |
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| 13 | |
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| 14 | __is_pod<int> ipi; |
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| 15 | |
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| 16 | // Ditto for __is_same. |
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| 17 | template<typename T> |
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| 18 | struct __is_same { // expected-warning {{keyword '__is_same' will be made available as an identifier}} |
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| 19 | }; |
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| 20 | |
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| 21 | __is_same<int> isi; |
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| 22 | |
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| 23 | // Another, similar egregious hack for __is_signed, which is a type |
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| 24 | // trait in Embarcadero's compiler but is used as an identifier in |
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| 25 | // libstdc++. |
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| 26 | struct test_is_signed { |
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| 27 | static const bool __is_signed = true; // expected-warning {{keyword '__is_signed' will be made available as an identifier}} |
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| 28 | }; |
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| 29 | |
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| 30 | bool check_signed = test_is_signed::__is_signed; |
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| 31 | |
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| 32 | template<bool B> struct must_be_true {}; |
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| 33 | template<> struct must_be_true<false>; |
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| 34 | |
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| 35 | void foo() { |
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| 36 | bool b = __is_pod(int); |
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| 37 | must_be_true<__is_pod(int)> mbt; |
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| 38 | } |
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| 39 | |
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| 40 | // expected-warning@+1 {{declaration does not declare anything}} |
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| 41 | struct // expected-error {{declaration of anonymous struct must be a definition}} |
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| 42 | #pragma pack(pop) |
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| 43 | S { |
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| 44 | }; |
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| 45 | |
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| 46 | #if !__has_feature(is_pod) |
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| 47 | # error __is_pod should still be available. |
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| 48 | #endif |
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| 49 | |
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