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 // common_type
13
14 #include <type_traits>
15
main()16 int main()
17 {
18 static_assert((std::is_same<std::common_type<int>::type, int>::value), "");
19 static_assert((std::is_same<std::common_type<char>::type, char>::value), "");
20 #if _LIBCPP_STD_VER > 11
21 static_assert((std::is_same<std::common_type_t<int>, int>::value), "");
22 static_assert((std::is_same<std::common_type_t<char>, char>::value), "");
23 #endif
24
25 static_assert((std::is_same<std::common_type< int>::type, int>::value), "");
26 static_assert((std::is_same<std::common_type<const int>::type, int>::value), "");
27 static_assert((std::is_same<std::common_type< volatile int>::type, int>::value), "");
28 static_assert((std::is_same<std::common_type<const volatile int>::type, int>::value), "");
29
30 static_assert((std::is_same<std::common_type<int, int>::type, int>::value), "");
31 static_assert((std::is_same<std::common_type<int, const int>::type, int>::value), "");
32
33 static_assert((std::is_same<std::common_type<long, const int>::type, long>::value), "");
34 static_assert((std::is_same<std::common_type<const long, int>::type, long>::value), "");
35 static_assert((std::is_same<std::common_type<long, volatile int>::type, long>::value), "");
36 static_assert((std::is_same<std::common_type<volatile long, int>::type, long>::value), "");
37 static_assert((std::is_same<std::common_type<const long, const int>::type, long>::value), "");
38
39 static_assert((std::is_same<std::common_type<double, char>::type, double>::value), "");
40 static_assert((std::is_same<std::common_type<short, char>::type, int>::value), "");
41 #if _LIBCPP_STD_VER > 11
42 static_assert((std::is_same<std::common_type_t<double, char>, double>::value), "");
43 static_assert((std::is_same<std::common_type_t<short, char>, int>::value), "");
44 #endif
45
46 static_assert((std::is_same<std::common_type<double, char, long long>::type, double>::value), "");
47 static_assert((std::is_same<std::common_type<unsigned, char, long long>::type, long long>::value), "");
48 #if _LIBCPP_STD_VER > 11
49 static_assert((std::is_same<std::common_type_t<double, char, long long>, double>::value), "");
50 static_assert((std::is_same<std::common_type_t<unsigned, char, long long>, long long>::value), "");
51 #endif
52 }
53