| //===----------------------------------------------------------------------===// |
| // |
| // 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_ADD_LVALUE_REFERENCE_H |
| #define _LIBCPP___TYPE_TRAITS_ADD_LVALUE_REFERENCE_H |
| |
| #include <__config> |
| #include <__type_traits/is_referenceable.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_lvalue_reference_impl { typedef _LIBCPP_NODEBUG _Tp type; }; |
| template <class _Tp > struct __add_lvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG _Tp& type; }; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_lvalue_reference |
| {typedef _LIBCPP_NODEBUG typename __add_lvalue_reference_impl<_Tp>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; |
| #endif |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_ADD_LVALUE_REFERENCE_H |
