Synopsis

(Required) Obsolescent language features shall not be used.

Enabled by default

Yes

Severity/Certainty

Medium/Medium

Full description

The ability to undefine and perhaps then redefine the macros bool, true, and false is an obsolescent feature.

Coding standards

Code examples

The following code example fails the check and will give a warning:

#undef bool

#undef false
#define false 1

#undef true
#define true 0

The following code example passes the check and will not give a warning about this issue:

#undef BOOL

#undef FALSE
#define FALSE -1

#undef MAYBE
#define MAYBE 0

#undef TRUE
#define TRUE 1