blob: 5198282cfbb0b2fc9da1207fd6dc8b7b1d97195d [file] [log] [blame]
// -*- 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_FORWARD_H
#define _LIBCPP___UTILITY_FORWARD_H
#include <__config>
#include <__type_traits/is_reference.h>
#include <__type_traits/remove_reference.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_DISABLE_DEBUG_INFO
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Tp>
_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR _Tp&&
forward(typename remove_reference<_Tp>::type& __t) _NOEXCEPT {
return static_cast<_Tp&&>(__t);
}
template <class _Tp>
_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR _Tp&&
forward(typename remove_reference<_Tp>::type&& __t) _NOEXCEPT {
static_assert(!is_lvalue_reference<_Tp>::value, "cannot forward an rvalue as an lvalue");
return static_cast<_Tp&&>(__t);
}
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_ENABLE_DEBUG_INFO
#endif // _LIBCPP___UTILITY_FORWARD_H