1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS 10 11 // <functional> 12 13 // negate 14 15 #include <functional> 16 #include <type_traits> 17 #include <cassert> 18 19 #include "test_macros.h" 20 main(int,char **)21int main(int, char**) 22 { 23 typedef std::negate<int> F; 24 const F f = F(); 25 #if TEST_STD_VER <= 17 26 static_assert((std::is_same<F::argument_type, int>::value), "" ); 27 static_assert((std::is_same<F::result_type, int>::value), "" ); 28 #endif 29 assert(f(36) == -36); 30 #if TEST_STD_VER > 11 31 typedef std::negate<> F2; 32 const F2 f2 = F2(); 33 assert(f2(36) == -36); 34 assert(f2(36L) == -36); 35 assert(f2(36.0) == -36); 36 37 constexpr int foo = std::negate<int> () (3); 38 static_assert ( foo == -3, "" ); 39 40 constexpr double bar = std::negate<> () (3.0); 41 static_assert ( bar == -3.0, "" ); 42 #endif 43 44 return 0; 45 } 46