unexpect.h 824 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___EXPECTED_UNEXPECT_H
  10. #define _LIBCPP___EXPECTED_UNEXPECT_H
  11. #include <__config>
  12. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  13. # pragma GCC system_header
  14. #endif
  15. #if _LIBCPP_STD_VER >= 20
  16. _LIBCPP_BEGIN_NAMESPACE_STD
  17. struct unexpect_t {
  18. explicit unexpect_t() = default;
  19. };
  20. inline constexpr unexpect_t unexpect{};
  21. _LIBCPP_END_NAMESPACE_STD
  22. #endif // _LIBCPP_STD_VER >= 23
  23. #endif // _LIBCPP___EXPECTED_UNEXPECT_H