46 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS10 11// <functional>12 13// negate14 15#include <functional>16#include <type_traits>17#include <cassert>18 19#include "test_macros.h"20 21int main(int, char**)22{23 typedef std::negate<int> F;24 const F f = F();25#if TEST_STD_VER <= 1726 static_assert((std::is_same<F::argument_type, int>::value), "" );27 static_assert((std::is_same<F::result_type, int>::value), "" );28#endif29 assert(f(36) == -36);30#if TEST_STD_VER > 1131 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#endif43 44 return 0;45}46