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 // plus
13
14 #include <functional>
15 #include <type_traits>
16 #include <cassert>
17
main()18 int main()
19 {
20 typedef std::plus<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<int, F::result_type>::value), "" );
25 assert(f(3, 2) == 5);
26 #if _LIBCPP_STD_VER > 11
27 typedef std::plus<> F2;
28 const F2 f2 = F2();
29 assert(f2(3,2) == 5);
30 assert(f2(3.0, 2) == 5);
31 assert(f2(3, 2.5) == 5.5);
32
33 constexpr int foo = std::plus<int> () (3, 2);
34 static_assert ( foo == 5, "" );
35
36 constexpr int bar = std::plus<> () (3.0, 2);
37 static_assert ( bar == 5, "" );
38 #endif
39 }
40