| // -*- 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 |
