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0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009 
0010 #ifndef _LIBCPP___UTILITY_AS_LVALUE_H
0011 #define _LIBCPP___UTILITY_AS_LVALUE_H
0012 
0013 #include <__config>
0014 
0015 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0016 #  pragma GCC system_header
0017 #endif
0018 
0019 _LIBCPP_PUSH_MACROS
0020 #include <__undef_macros>
0021 
0022 _LIBCPP_BEGIN_NAMESPACE_STD
0023 
0024 #ifndef _LIBCPP_CXX03_LANG
0025 
0026 template <class _Tp>
0027 _LIBCPP_HIDE_FROM_ABI constexpr _Tp& __as_lvalue(_LIBCPP_LIFETIMEBOUND _Tp&& __t) {
0028   return static_cast<_Tp&>(__t);
0029 }
0030 
0031 #endif // !_LIBCPP_CXX03_LANG
0032 
0033 _LIBCPP_END_NAMESPACE_STD
0034 
0035 _LIBCPP_POP_MACROS
0036 
0037 #endif // _LIBCPP___UTILITY_AS_LVALUE_H