underlying_type.pass.cpp revision 737a351850d18b63a8f89c195cb9ebfdfaa44f6d 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// type_traits
11
12// underlying_type
13
14#include <type_traits>
15#include <climits>
16
17int main()
18{
19    enum E { V = INT_MIN };
20    enum F { W = UINT_MAX };
21
22    static_assert((std::is_same<std::underlying_type<E>::type, int>::value),
23                  "E has the wrong underlying type");
24    static_assert((std::is_same<std::underlying_type<F>::type, unsigned>::value),
25                  "F has the wrong underlying type");
26
27#if __has_feature(cxx_strong_enums)
28    enum G : char { };
29
30    static_assert((std::is_same<std::underlying_type<G>::type, char>::value),
31                  "G has the wrong underlying type");
32#endif // __has_feature(cxx_strong_enums)
33}
34