[previous] 0858 [next] [L] Number of macro parameters exceeds 31 - program does not conform strictly to ISO:C90.
ISO C90 Conformance limits REFERENCE - ISO:C90-5.2.4.1 Translation Limits

The translation limits specified in the ISO:C Standard define a minimum set of conditions which a compiler must support in order to be described as conforming. In practice, compilers will often tolerate code which exceeds these minimal requirements. However, in order to ensure portability, it is advisable to avoid writing code that assumes a level of compiler capability which may not always be supported.

Message 0858 identifies a function-like macro definition which has more than 31 parameters, the minimum requirement of the ISO:C90 Standard. This message is not identifying incorrect code but does identify code which is described in the standard as not strictly conforming.

For example: 


/*PRQA S 2017,3408,3429,3453 ++*/

#define MAC(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,aa,bb,cc,dd,ee,ff)  1  /* Message 0858 */

extern void foo(void)
{
}

MISRA-C:2004 Rules applicable to message 0858:

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:

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