| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // type_traits |
| |
| // underlying_type |
| |
| #include <type_traits> |
| #include <climits> |
| |
| #include "test_macros.h" |
| |
| enum E { V = INT_MIN }; |
| |
| #if !defined(_WIN32) || defined(__MINGW32__) |
| #define TEST_UNSIGNED_UNDERLYING_TYPE 1 |
| #else |
| #define TEST_UNSIGNED_UNDERLYING_TYPE 0 // MSVC's ABI doesn't follow the Standard |
| #endif |
| |
| #if TEST_UNSIGNED_UNDERLYING_TYPE |
| enum F { W = UINT_MAX }; |
| #endif // TEST_UNSIGNED_UNDERLYING_TYPE |
| |
| int main() |
| { |
| static_assert((std::is_same<std::underlying_type<E>::type, int>::value), |
| "E has the wrong underlying type"); |
| #if TEST_UNSIGNED_UNDERLYING_TYPE |
| static_assert((std::is_same<std::underlying_type<F>::type, unsigned>::value), |
| "F has the wrong underlying type"); |
| #endif // TEST_UNSIGNED_UNDERLYING_TYPE |
| |
| #if TEST_STD_VER > 11 |
| static_assert((std::is_same<std::underlying_type_t<E>, int>::value), ""); |
| #if TEST_UNSIGNED_UNDERLYING_TYPE |
| static_assert((std::is_same<std::underlying_type_t<F>, unsigned>::value), ""); |
| #endif // TEST_UNSIGNED_UNDERLYING_TYPE |
| #endif // TEST_STD_VER > 11 |
| |
| #if TEST_STD_VER >= 11 |
| enum G : char { }; |
| |
| static_assert((std::is_same<std::underlying_type<G>::type, char>::value), |
| "G has the wrong underlying type"); |
| #if TEST_STD_VER > 11 |
| static_assert((std::is_same<std::underlying_type_t<G>, char>::value), ""); |
| #endif // TEST_STD_VER > 11 |
| #endif // TEST_STD_VER >= 11 |
| } |