|  | // -*- 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___UTILITY_AS_LVALUE_H | 
|  | #define _LIBCPP___UTILITY_AS_LVALUE_H | 
|  |  | 
|  | #include <__config> | 
|  |  | 
|  | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | 
|  | #  pragma GCC system_header | 
|  | #endif | 
|  |  | 
|  | _LIBCPP_PUSH_MACROS | 
|  | #include <__undef_macros> | 
|  |  | 
|  | _LIBCPP_BEGIN_NAMESPACE_STD | 
|  |  | 
|  | #ifndef _LIBCPP_CXX03_LANG | 
|  |  | 
|  | template <class _Tp> | 
|  | _LIBCPP_HIDE_FROM_ABI constexpr _Tp& __as_lvalue(_LIBCPP_LIFETIMEBOUND _Tp&& __t) { | 
|  | return static_cast<_Tp&>(__t); | 
|  | } | 
|  |  | 
|  | #endif // !_LIBCPP_CXX03_LANG | 
|  |  | 
|  | _LIBCPP_END_NAMESPACE_STD | 
|  |  | 
|  | _LIBCPP_POP_MACROS | 
|  |  | 
|  | #endif // _LIBCPP___UTILITY_AS_LVALUE_H |