| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS |
| |
| // <functional> |
| |
| // negate |
| |
| #include <functional> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| int main(int, char**) |
| { |
| typedef std::negate<int> F; |
| const F f = F(); |
| #if TEST_STD_VER <= 17 |
| static_assert((std::is_same<F::argument_type, int>::value), "" ); |
| static_assert((std::is_same<F::result_type, int>::value), "" ); |
| #endif |
| assert(f(36) == -36); |
| #if TEST_STD_VER > 11 |
| typedef std::negate<> F2; |
| const F2 f2 = F2(); |
| assert(f2(36) == -36); |
| assert(f2(36L) == -36); |
| assert(f2(36.0) == -36); |
| |
| constexpr int foo = std::negate<int> () (3); |
| static_assert ( foo == -3, "" ); |
| |
| constexpr double bar = std::negate<> () (3.0); |
| static_assert ( bar == -3.0, "" ); |
| #endif |
| |
| return 0; |
| } |