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> struct _LIBCPP_TEMPLATE_VIS remove_const {typedef _Tp type;}; 30 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const<const _Tp> {typedef _Tp type;}; 31 32 template <class _Tp> 33 using __remove_const_t = typename remove_const<_Tp>::type; 34 #endif // __has_builtin(__remove_const) 35 36 #if _LIBCPP_STD_VER > 11 37 template <class _Tp> using remove_const_t = __remove_const_t<_Tp>; 38 #endif 39 40 _LIBCPP_END_NAMESPACE_STD 41 42 #endif // _LIBCPP___TYPE_TRAITS_REMOVE_CONST_H 43