unreachable.h 964 B

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  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___UTILITY_UNREACHABLE_H
  9. #define _LIBCPP___UTILITY_UNREACHABLE_H
  10. #include <__config>
  11. #include <cstdlib>
  12. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  13. # pragma GCC system_header
  14. #endif
  15. _LIBCPP_BEGIN_NAMESPACE_STD
  16. _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI inline void __libcpp_unreachable()
  17. {
  18. #if __has_builtin(__builtin_unreachable)
  19. __builtin_unreachable();
  20. #else
  21. std::abort();
  22. #endif
  23. }
  24. #if _LIBCPP_STD_VER > 20
  25. [[noreturn]] _LIBCPP_HIDE_FROM_ABI inline void unreachable() { __libcpp_unreachable(); }
  26. #endif // _LIBCPP_STD_VER > 20
  27. _LIBCPP_END_NAMESPACE_STD
  28. #endif