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_REMOVE_REFERENCE_H 10 #define _LIBCPP___TYPE_TRAITS_REMOVE_REFERENCE_H 11 12 #include <__config> 13 14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15 # pragma GCC system_header 16 #endif 17 18 _LIBCPP_BEGIN_NAMESPACE_STD 19 20 #if __has_builtin(__remove_reference_t) 21 template <class _Tp> 22 struct _LIBCPP_NO_SPECIALIZATIONS remove_reference { 23 using type _LIBCPP_NODEBUG = __remove_reference_t(_Tp); 24 }; 25 26 template <class _Tp> 27 using __libcpp_remove_reference_t _LIBCPP_NODEBUG = __remove_reference_t(_Tp); 28 #elif __has_builtin(__remove_reference) 29 template <class _Tp> 30 struct remove_reference { 31 using type _LIBCPP_NODEBUG = __remove_reference(_Tp); 32 }; 33 34 template <class _Tp> 35 using __libcpp_remove_reference_t = typename remove_reference<_Tp>::type; 36 #else 37 // clang-format off 38 template <class _Tp> struct remove_reference {using type _LIBCPP_NODEBUG = _Tp;}; 39 template <class _Tp> struct remove_reference<_Tp&> {using type _LIBCPP_NODEBUG = _Tp;}; 40 template <class _Tp> struct remove_reference<_Tp&&> {using type _LIBCPP_NODEBUG = _Tp;}; 41 // clang-format on 42 43 template <class _Tp> 44 using __libcpp_remove_reference_t = typename remove_reference<_Tp>::type; 45 #endif // __has_builtin(__remove_reference_t) 46 47 #if _LIBCPP_STD_VER >= 14 48 template <class _Tp> 49 using remove_reference_t = __libcpp_remove_reference_t<_Tp>; 50 #endif 51 52 _LIBCPP_END_NAMESPACE_STD 53 54 #endif // _LIBCPP___TYPE_TRAITS_REMOVE_REFERENCE_H 55