1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___TYPE_TRAITS_ADD_RVALUE_REFERENCE_H 10 #define _LIBCPP___TYPE_TRAITS_ADD_RVALUE_REFERENCE_H 11 12 #include <__config> 13 #include <__type_traits/is_referenceable.h> 14 15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16 # pragma GCC system_header 17 #endif 18 19 _LIBCPP_BEGIN_NAMESPACE_STD 20 21 template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_rvalue_reference_impl { typedef _LIBCPP_NODEBUG _Tp type; }; 22 template <class _Tp > struct __add_rvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG _Tp&& type; }; 23 24 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_rvalue_reference 25 {typedef _LIBCPP_NODEBUG typename __add_rvalue_reference_impl<_Tp>::type type;}; 26 27 #if _LIBCPP_STD_VER > 11 28 template <class _Tp> using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; 29 #endif 30 31 _LIBCPP_END_NAMESPACE_STD 32 33 #endif // _LIBCPP___TYPE_TRAITS_ADD_RVALUE_REFERENCE_H 34