| // RUN: %clang_cc1 -fsyntax-only -verify %s |
| |
| // This is a test for an egregious hack in Clang that works around |
| // issues with GCC's evolution. libstdc++ 4.2.x uses __is_pod as an |
| // identifier (to declare a struct template like the one below), while |
| // GCC 4.3 and newer make __is_pod a keyword. Clang treats __is_pod as |
| // a keyword *unless* it is introduced following the struct keyword. |
| |
| template<typename T> |
| struct __is_pod { // expected-warning {{keyword '__is_pod' will be made available as an identifier}} |
| __is_pod() {} |
| }; |
| |
| __is_pod<int> ipi; |
| |
| // Ditto for __is_same. |
| template<typename T> |
| struct __is_same { // expected-warning {{keyword '__is_same' will be made available as an identifier}} |
| }; |
| |
| __is_same<int> isi; |
| |
| // Another, similar egregious hack for __is_signed, which is a type |
| // trait in Embarcadero's compiler but is used as an identifier in |
| // libstdc++. |
| struct test_is_signed { |
| static const bool __is_signed = true; // expected-warning {{keyword '__is_signed' will be made available as an identifier}} |
| }; |
| |
| bool check_signed = test_is_signed::__is_signed; |
| |
| template<bool B> struct must_be_true {}; |
| template<> struct must_be_true<false>; |
| |
| void foo() { |
| bool b = __is_pod(int); |
| must_be_true<__is_pod(int)> mbt; |
| } |
| |
| // expected-warning@+1 {{declaration does not declare anything}} |
| struct // expected-error {{declaration of anonymous struct must be a definition}} |
| #pragma pack(pop) |
| S { |
| }; |
| |
| #if !__has_feature(is_pod) |
| # error __is_pod should still be available. |
| #endif |