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_CVREF_H 10 #define _LIBCPP___TYPE_TRAITS_REMOVE_CVREF_H 11 12 #include <__config> 13 #include <__type_traits/is_same.h> 14 #include <__type_traits/remove_cv.h> 15 #include <__type_traits/remove_reference.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _Tp> 24 using __uncvref_t _LIBCPP_NODEBUG = typename remove_cv<typename remove_reference<_Tp>::type>::type; 25 26 template <class _Tp, class _Up> 27 struct __is_same_uncvref : _IsSame<__uncvref_t<_Tp>, __uncvref_t<_Up> > {}; 28 29 #if _LIBCPP_STD_VER > 17 30 // remove_cvref - same as __uncvref 31 template <class _Tp> 32 struct remove_cvref { 33 using type _LIBCPP_NODEBUG = __uncvref_t<_Tp>; 34 }; 35 36 template <class _Tp> using remove_cvref_t = typename remove_cvref<_Tp>::type; 37 #endif 38 39 _LIBCPP_END_NAMESPACE_STD 40 41 #endif // _LIBCPP___TYPE_TRAITS_REMOVE_CVREF_H 42