Ruby  2.7.1p83(2020-03-31revisiona0c7c23c9cec0d0ffcba012279cd652d28ad5bf3)
stdbool.h
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1 /*
2  * missing/stdbool.h: Quick alternative of C99 stdbool.h
3  */
4 
5 #ifndef _MISSING_STDBOOL_H_
6 #define _MISSING_STDBOOL_H_
7 
8 #ifndef __bool_true_false_are_defined
9 # ifndef __cplusplus
10 # undef bool
11 # undef false
12 # undef true
13 # define bool signed char
14 # define false 0
15 # define true 1
16 # define __bool_true_false_are_defined 1
17 # endif
18 #endif
19 
20 #endif /* _MISSING_STDBOOL_H_ */