1*5f757f3fSDimitry Andric // -*- C++ -*- 2*5f757f3fSDimitry Andric //===----------------------------------------------------------------------===// 3*5f757f3fSDimitry Andric // 4*5f757f3fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5*5f757f3fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6*5f757f3fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7*5f757f3fSDimitry Andric // 8*5f757f3fSDimitry Andric //===----------------------------------------------------------------------===// 9*5f757f3fSDimitry Andric 10*5f757f3fSDimitry Andric #ifndef _LIBCPP___UTILITY_AS_LVALUE_H 11*5f757f3fSDimitry Andric #define _LIBCPP___UTILITY_AS_LVALUE_H 12*5f757f3fSDimitry Andric 13*5f757f3fSDimitry Andric #include <__config> 14*5f757f3fSDimitry Andric 15*5f757f3fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16*5f757f3fSDimitry Andric # pragma GCC system_header 17*5f757f3fSDimitry Andric #endif 18*5f757f3fSDimitry Andric 19*5f757f3fSDimitry Andric _LIBCPP_PUSH_MACROS 20*5f757f3fSDimitry Andric #include <__undef_macros> 21*5f757f3fSDimitry Andric 22*5f757f3fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 23*5f757f3fSDimitry Andric 24*5f757f3fSDimitry Andric #ifndef _LIBCPP_CXX03_LANG 25*5f757f3fSDimitry Andric 26*5f757f3fSDimitry Andric template <class _Tp> 27*5f757f3fSDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr _Tp& __as_lvalue(_LIBCPP_LIFETIMEBOUND _Tp&& __t) { 28*5f757f3fSDimitry Andric return static_cast<_Tp&>(__t); 29*5f757f3fSDimitry Andric } 30*5f757f3fSDimitry Andric 31*5f757f3fSDimitry Andric #endif // !_LIBCPP_CXX03_LANG 32*5f757f3fSDimitry Andric 33*5f757f3fSDimitry Andric _LIBCPP_END_NAMESPACE_STD 34*5f757f3fSDimitry Andric 35*5f757f3fSDimitry Andric _LIBCPP_POP_MACROS 36*5f757f3fSDimitry Andric 37*5f757f3fSDimitry Andric #endif // _LIBCPP___UTILITY_AS_LVALUE_H 38