default_sentinel.h 836 B

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  1. // -*- C++ -*-
  2. //===----------------------------------------------------------------------===//
  3. //
  4. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  5. // See https://llvm.org/LICENSE.txt for license information.
  6. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  7. //
  8. //===----------------------------------------------------------------------===//
  9. #ifndef _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
  10. #define _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
  11. #include <__config>
  12. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  13. # pragma GCC system_header
  14. #endif
  15. _LIBCPP_BEGIN_NAMESPACE_STD
  16. #if _LIBCPP_STD_VER >= 20
  17. struct default_sentinel_t {};
  18. inline constexpr default_sentinel_t default_sentinel{};
  19. #endif // _LIBCPP_STD_VER >= 20
  20. _LIBCPP_END_NAMESPACE_STD
  21. #endif // _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H