| //===----------------------------------------------------------------------===// |
| // |
| // 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___TYPE_TRAITS_IS_REFERENCE_WRAPPER_H |
| #define _LIBCPP___TYPE_TRAITS_IS_REFERENCE_WRAPPER_H |
| |
| #include <__config> |
| #include <__type_traits/integral_constant.h> |
| #include <__type_traits/remove_cv.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Tp> class _LIBCPP_TEMPLATE_VIS reference_wrapper; |
| |
| template <class _Tp> struct __is_reference_wrapper_impl : public false_type {}; |
| template <class _Tp> struct __is_reference_wrapper_impl<reference_wrapper<_Tp> > : public true_type {}; |
| template <class _Tp> struct __is_reference_wrapper |
| : public __is_reference_wrapper_impl<__remove_cv_t<_Tp> > {}; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_ENABLE_IF_H |