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Language extensions

The '__alignof__' operator has been used. Message 1022 identifies instances of this language extension.

__alignof__ can be used in much the same way as 'sizeof'. Instead of returning a size, it returns a value which represents the alignment requirement of the operand (in bytes). As with 'sizeof', the operand may be either an expression or an explicit type.

In the context of QAC, __alignof__ will return the alignment value as determined from the configuration option -align.

For example: 


/*PRQA S 1257,2017,3198,3199,3203,3408 ++*/

extern void foo(void)
{
  int test;

  test = __alignof__(char);   /* Message 1022 */

  test = __alignof__(test);   /* Message 1022 */
}

MISRA C:2012 Rules applicable to message 1022:

Rule-1.2  (Advisory) Language extensions should not be used

See also:

QA·C Source Code Analyser 8.1
MISRA C:2012 Compliance Module 1.0
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