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_IS_PRIMARY_TEMPLATE_H
10#define _LIBCPP___TYPE_TRAITS_IS_PRIMARY_TEMPLATE_H
11
12#include <__config>
13#include <__type_traits/is_same.h>
14
15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16# pragma GCC system_header
17#endif
18
19#if _LIBCPP_STD_VER >= 20
20
21_LIBCPP_BEGIN_NAMESPACE_STD
22
23template <class _Tp>
24concept __primary_template = requires {
25 typename _Tp::__primary_template;
26 requires _IsSame<typename _Tp::__primary_template, _Tp>::value;
27};
28
29_LIBCPP_END_NAMESPACE_STD
30
31#endif // _LIBCPP_STD_VER >= 20
32
33#endif // _LIBCPP___TYPE_TRAITS_IS_PRIMARY_TEMPLATE_H
34