QA·C Help - 0845

	0845	[C] Object-like macro '%s' is being redefined as a function-like macro.

Constraint violations		REFERENCE - ISO:C90-6.8.3 Macro Replacement - Constraints

This is a constraint error

An object-like macro cannot be redefined as a function-like macro without using the #undef directive first.

For example:


/*PRQA S 553,841,3429,3614 ++*/

#define G1 (0)
#define G2 (0)

#define G1(a ,b) a ## b       /* Message 0845 */

#undef G2

#define G2(a ,b) a ## b       /* OK           */

MISRA-C:2004 Rules applicable to message 0845:

Rule 1.1 (Required)

All code shall conform to ISO/IEC 9899:1990 C programming language, ISO 9899, amended and corrected by ISO/IEC 9899/COR1:1995, ISO/IEC 9899/AMD1:1995, and ISO/IEC 9899/COR2: 1996192

See also:

0834 [C] Function-like macro '%s()' is being redefined as an object-like macro.
3614 Macro '%s' is being defined more than once without using #undef to remove the previous definition.

QA·C Source Code Analyser 8.1
MISRA-C:2004 Compliance Module 3.2
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