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>
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 > 17
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 > 17
28 
29 _LIBCPP_END_NAMESPACE_STD
30 
31 #endif // _LIBCPP___CONCEPTS_DIFFERENT_FROM_H
32