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// minus 13 14#include <functional> 15#include <type_traits> 16#include <cassert> 17 18int main() 19{ 20 typedef std::minus<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) == 1); 26#if _LIBCPP_STD_VER > 11 27 typedef std::minus<> F2; 28 const F2 f2 = F2(); 29 assert(f2(3,2) == 1); 30 assert(f2(3.0, 2) == 1); 31 assert(f2(3, 2.5) == 0.5); 32 33 constexpr int foo = std::minus<int> () (3, 2); 34 static_assert ( foo == 1, "" ); 35 36 constexpr int bar = std::minus<> () (3.0, 2); 37 static_assert ( bar == 1, "" ); 38#endif 39} 40