MISRAC2012-Rule-21.1
In this section:
Synopsis
(Required) #define and #undef shall not be used on a reserved identifier or reserved macro name
Enabled by default
Yes
Severity/Certainty
Low/Low
Full description
Detected a #define or #undef of a reserved identifier in the standard library. This check is identical to MISRAC2004-20.1, MISRAC++2008-17-0-1.
Coding standards
- MISRA C:2004 20.1
(Required) Reserved identifiers, macros, and functions in the standard library shall not be defined, redefined, or undefined.
- MISRA C:2012 Rule-21.1
(Required) #define and #undef shall not be used on a reserved identifier or reserved macro name
- MISRA C++ 2008 17-0-1
(Required) Reserved identifiers, macros and functions in the standard library shall not be defined, redefined or undefined.
Code examples
The following code example fails the check and will give a warning:
#define __TIME__ 11111111 /* Non-compliant */
The following code example passes the check and will not give a warning about this issue:
#define A(x) (x) /* Compliant */