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_CONST_H 10 #define _LIBCPP___TYPE_TRAITS_REMOVE_CONST_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_const) 21 template <class _Tp> 22 struct remove_const { 23 using type _LIBCPP_NODEBUG = __remove_const(_Tp); 24 }; 25 26 template <class _Tp> 27 using __remove_const_t = __remove_const(_Tp); 28 #else 29 template <class _Tp> 30 struct _LIBCPP_TEMPLATE_VIS remove_const { 31 typedef _Tp type; 32 }; 33 template <class _Tp> 34 struct _LIBCPP_TEMPLATE_VIS remove_const<const _Tp> { 35 typedef _Tp type; 36 }; 37 38 template <class _Tp> 39 using __remove_const_t = typename remove_const<_Tp>::type; 40 #endif // __has_builtin(__remove_const) 41 42 #if _LIBCPP_STD_VER >= 14 43 template <class _Tp> 44 using remove_const_t = __remove_const_t<_Tp>; 45 #endif 46 47 _LIBCPP_END_NAMESPACE_STD 48 49 #endif // _LIBCPP___TYPE_TRAITS_REMOVE_CONST_H 50