Rule 13.4 For statement operand assignment

[shaw]

The third operand of the for statement has an assignment. Does the calculation violate the result that the assignment operator should not be used?

for ( pos = (&dev->list)->next, q = pos->next; pos != (&dev->list); pos = q, q = pos->next ) {/*        */}

[misra-c]

The code does not violate rule 13.4 "The result of an assignment operator should not be used".

Examples of 13.4 violations would be 

Code:

x = pos = q; 
if ( pos = q );

However, the code does violate:

Rule 12.3  "The comma operator should not be used" which includes the 1st and 3rd clauses of a for loop

Rule 14.2  "A for loop shall be well-formed". This requires the use of a single loop counter with a scalar type.