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
17 enum E { V = INT_MIN };
18 enum F { W = UINT_MAX };
19
main()20 int main()
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 _LIBCPP_STD_VER > 11
28 static_assert((std::is_same<std::underlying_type_t<E>, int>::value), "");
29 static_assert((std::is_same<std::underlying_type_t<F>, unsigned>::value), "");
30 #endif
31
32 #if __has_feature(cxx_strong_enums)
33 enum G : char { };
34
35 static_assert((std::is_same<std::underlying_type<G>::type, char>::value),
36 "G has the wrong underlying type");
37 #if _LIBCPP_STD_VER > 11
38 static_assert((std::is_same<std::underlying_type_t<G>, char>::value), "");
39 #endif
40 #endif // __has_feature(cxx_strong_enums)
41 }
42