MISRA C:2012  Rule-18.4:  (Advisory)			The +, -, += and -= operators should not be applied to an expression of pointer type

Exception:

Subject to Rule-18.2, pointer subtraction between two pointers is allowed.

Example Code:

#include "misra.h"
#include "m3cmex.h"

extern int16_t rule_1804( void )
{
    uint8_t ax[ 20 ];
    uint8_t * ptr;

    ptr = ax;

    ptr ++;                                                     /*      */      /* Compliant     */
    ptr = ptr + 1;                                              /*      */      /* Non-compliant */

    ptr = ptr + 5;                                              /* 0488 */      /* Non-compliant */
    *( ptr + 5 ) = 0U;                                          /* 0488 */      /* Non-compliant */
    ptr[ 5 ] = 0U;                                              /*      */      /* Compliant     */

    return 1;
}

QAC messages that encompass this guideline:

0488	Performing pointer arithmetic.

(c) The Motor Industry Research Association, 2012

QA C Source Code Analyser 8.1.2 MISRA C:2012 Compliance Module 1.0 © 2013 Programming Research www.programmingresearch.com

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