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 // <functional>
11
12 // equal_to
13
14 #include <functional>
15 #include <type_traits>
16 #include <cassert>
17
main()18 int main()
19 {
20 typedef std::equal_to<int> F;
21 const F f = F();
22 static_assert((std::is_same<int, F::first_argument_type>::value), "" );
23 static_assert((std::is_same<int, F::second_argument_type>::value), "" );
24 static_assert((std::is_same<bool, F::result_type>::value), "" );
25 assert(f(36, 36));
26 assert(!f(36, 6));
27 #if _LIBCPP_STD_VER > 11
28 typedef std::equal_to<> F2;
29 const F2 f2 = F2();
30 assert(f2(36, 36));
31 assert(!f2(36, 6));
32 assert(f2(36, 36.0));
33 assert(f2(36.0, 36L));
34
35 constexpr bool foo = std::equal_to<int> () (36, 36);
36 static_assert ( foo, "" );
37
38 constexpr bool bar = std::equal_to<> () (36.0, 36);
39 static_assert ( bar, "" );
40 #endif
41 }
42