| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <functional> |
| |
| // struct is_placeholder |
| |
| #include <functional> |
| #include "test_macros.h" |
| |
| template <int Expected, class T> |
| void |
| test(const T&) |
| { |
| static_assert(std::is_placeholder<T>::value == Expected, ""); |
| #if TEST_STD_VER > 14 |
| static_assert(std::is_placeholder_v<T> == Expected, ""); |
| #endif |
| } |
| |
| struct C {}; |
| |
| int main(int, char**) |
| { |
| test<1>(std::placeholders::_1); |
| test<2>(std::placeholders::_2); |
| test<3>(std::placeholders::_3); |
| test<4>(std::placeholders::_4); |
| test<5>(std::placeholders::_5); |
| test<6>(std::placeholders::_6); |
| test<7>(std::placeholders::_7); |
| test<8>(std::placeholders::_8); |
| test<9>(std::placeholders::_9); |
| test<10>(std::placeholders::_10); |
| test<0>(4); |
| test<0>(5.5); |
| test<0>('a'); |
| test<0>(C()); |
| |
| return 0; |
| } |