semiregular.h 900 B

123456789101112131415161718192021222324252627282930313233
  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. #ifndef _LIBCPP___CONCEPTS_SEMIREGULAR_H
  9. #define _LIBCPP___CONCEPTS_SEMIREGULAR_H
  10. #include <__concepts/constructible.h>
  11. #include <__concepts/copyable.h>
  12. #include <__config>
  13. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  14. # pragma GCC system_header
  15. #endif
  16. _LIBCPP_BEGIN_NAMESPACE_STD
  17. #if _LIBCPP_STD_VER >= 20
  18. // [concept.object]
  19. template <class _Tp>
  20. concept semiregular = copyable<_Tp> && default_initializable<_Tp>;
  21. #endif // _LIBCPP_STD_VER >= 20
  22. _LIBCPP_END_NAMESPACE_STD
  23. #endif // _LIBCPP___CONCEPTS_SEMIREGULAR_H