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 // multiplies 13 14 #include <functional> 15 #include <type_traits> 16 #include <cassert> 17 18 int main() 19 { 20 typedef std::multiplies<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) == 6); 26 #if _LIBCPP_STD_VER > 11 27 typedef std::multiplies<> F2; 28 const F2 f2 = F2(); 29 assert(f2(3,2) == 6); 30 assert(f2(3.0, 2) == 6); 31 assert(f2(3, 2.5) == 7.5); // exact in binary 32 33 constexpr int foo = std::multiplies<int> () (3, 2); 34 static_assert ( foo == 6, "" ); 35 36 constexpr int bar = std::multiplies<> () (3.0, 2); 37 static_assert ( bar == 6, "" ); 38 #endif 39 } 40
