QA·C Help - 1022

	1022	[E] '__alignof__' is not supported in ISO C, and is treated as a language extension.

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 QA·C, __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 */
}

See also:

1020 [E] '__typeof__' is not supported in ISO C, and is treated as a language extension.

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