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 18 #include "test_macros.h" 19 20 int main() 21 { 22 typedef std::minus<int> F; 23 const F f = F(); 24 static_assert((std::is_same<int, F::first_argument_type>::value), "" ); 25 static_assert((std::is_same<int, F::second_argument_type>::value), "" ); 26 static_assert((std::is_same<int, F::result_type>::value), "" ); 27 assert(f(3, 2) == 1); 28 #if TEST_STD_VER > 11 29 typedef std::minus<> F2; 30 const F2 f2 = F2(); 31 assert(f2(3,2) == 1); 32 assert(f2(3.0, 2) == 1); 33 assert(f2(3, 2.5) == 0.5); 34 35 constexpr int foo = std::minus<int> () (3, 2); 36 static_assert ( foo == 1, "" ); 37 38 constexpr double bar = std::minus<> () (3.0, 2); 39 static_assert ( bar == 1.0, "" ); 40 #endif 41 } 42
