1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _LIBCPP___UTILITY_AS_LVALUE_H 11 #define _LIBCPP___UTILITY_AS_LVALUE_H 12 13 #include <__config> 14 15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16 # pragma GCC system_header 17 #endif 18 19 _LIBCPP_PUSH_MACROS 20 #include <__undef_macros> 21 22 _LIBCPP_BEGIN_NAMESPACE_STD 23 24 #ifndef _LIBCPP_CXX03_LANG 25 26 template <class _Tp> 27 _LIBCPP_HIDE_FROM_ABI constexpr _Tp& __as_lvalue(_LIBCPP_LIFETIMEBOUND _Tp&& __t) { 28 return static_cast<_Tp&>(__t); 29 } 30 31 #endif // !_LIBCPP_CXX03_LANG 32 33 _LIBCPP_END_NAMESPACE_STD 34 35 _LIBCPP_POP_MACROS 36 37 #endif // _LIBCPP___UTILITY_AS_LVALUE_H 38