Synopsis

(Required) The sizeof operator shall not be used on expressions that contain side effects. The sizeof operator was found used on expressions that contain side effects. This might make it look as if the expression will be evaluated, but because sizeof only operates on the type of the expression, the expression itself is not evaluated.

Enabled by default

Yes

Severity/Certainty

Medium/Medium

Full description

Sizeof expressions were found that contain side effects. This check is identical to SIZEOF-side-effect, MISRAC++2008-5-3-4.

Coding standards

Code examples

The following code example fails the check and will give a warning:

void example(void) {
	int i;
	int size = sizeof(i++);
}

The following code example passes the check and will not give a warning about this issue:

void example(void) {
	int i;
	int size = sizeof(i);
	i++;
}