| // -*- C++ -*- | |
| //===----------------------------------------------------------------------===// | |
| // | |
| // 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 | |
| // | |
| //===----------------------------------------------------------------------===// | |
| #ifndef _LIBCPP___FUNCTIONAL_IS_TRANSPARENT | |
| #define _LIBCPP___FUNCTIONAL_IS_TRANSPARENT | |
| #include <__config> | |
| #include <type_traits> | |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | |
| #pragma GCC system_header | |
| #endif | |
| _LIBCPP_BEGIN_NAMESPACE_STD | |
| #if _LIBCPP_STD_VER > 11 | |
| template <class _Tp, class, class = void> | |
| struct __is_transparent : false_type {}; | |
| template <class _Tp, class _Up> | |
| struct __is_transparent<_Tp, _Up, | |
| typename __void_t<typename _Tp::is_transparent>::type> | |
| : true_type {}; | |
| #endif | |
| _LIBCPP_END_NAMESPACE_STD | |
| #endif // _LIBCPP___FUNCTIONAL_IS_TRANSPARENT |