QA·C Help - 1024

	1024	[C] Using '__alignof__' on incomplete types is illegal.

Constraint violations

This is a constraint error

The operand of the __alignof__ operator cannot be of incomplete type.

'__alignof__' is not part of the standard C language. It is supported by the GCC compiler as an operator that returns the alignment requirements in bytes of its operand.

For example:


/*PRQA S 1022,1257,2017,3199,3203,3408,3447,3625,3684 ++*/

extern char buf[];

extern void foo(void)
{
  int a;

  a = __alignof__(buf);         /* Message 1024 */
}

MISRA C:2012 Rules applicable to message 1024:

Rule-1.1 (Required)

The program shall contain no violations of the standard C syntax and constraints, and shall not exceed the implementation's translation limits

See also:

1022 [E] '__alignof__' is not supported in ISO C, and is treated as a language extension.
1023 [C] Using '__alignof__' on function types is illegal.
1025 [C] Using '__alignof__' on bit-fields is illegal.

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MISRA C:2012 Compliance Module 1.0
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