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___CONCEPTS_DIFFERENT_FROM_H 10 #define _LIBCPP___CONCEPTS_DIFFERENT_FROM_H 11 12 #include <__concepts/same_as.h> 13 #include <__config> 14 #include <__type_traits/remove_cvref.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 #if _LIBCPP_STD_VER >= 20 23 24 template <class _Tp, class _Up> 25 concept __different_from = !same_as<remove_cvref_t<_Tp>, remove_cvref_t<_Up>>; 26 27 #endif // _LIBCPP_STD_VER >= 20 28 29 _LIBCPP_END_NAMESPACE_STD 30 31 #endif // _LIBCPP___CONCEPTS_DIFFERENT_FROM_H 32