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  1. /*===---- stdbool.h - Standard header for booleans -------------------------===
  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.  
  10. #ifndef __STDBOOL_H
  11. #define __STDBOOL_H
  12.  
  13. #define __bool_true_false_are_defined 1
  14.  
  15. #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 201710L
  16. /* FIXME: We should be issuing a deprecation warning here, but cannot yet due
  17.  * to system headers which include this header file unconditionally.
  18.  */
  19. #elif !defined(__cplusplus)
  20. #define bool _Bool
  21. #define true 1
  22. #define false 0
  23. #elif defined(__GNUC__) && !defined(__STRICT_ANSI__)
  24. /* Define _Bool as a GNU extension. */
  25. #define _Bool bool
  26. #if defined(__cplusplus) && __cplusplus < 201103L
  27. /* For C++98, define bool, false, true as a GNU extension. */
  28. #define bool bool
  29. #define false false
  30. #define true true
  31. #endif
  32. #endif
  33.  
  34. #endif /* __STDBOOL_H */
  35.