0515			[C] Equality operator used to compare a pointer with an incompatible operand.
	Constraint violations				REFERENCE - ISO:C90-6.3.9 Equality Operators - Constraints

• Both operands are of arithmetic type, or
• Both operands are pointers to qualified or unqualified versions of compatible types, or
• One operand is a pointer to an object or incomplete type and the other is a pointer to a qualified or unqualified version of void, or
• One operand has pointer type and the other is a null pointer constant

/*PRQA S 490,3120,3227,3408,3602,3625 ++*/

int  *pi;

void foo(unsigned long un)
{
    if (pi != un)            /* Message 0515 */
    {
    }

    if (pi == 0x8F00U)       /* Message 0515 */
    {
    }
}

See also:

• 0513 [C] Relational operator used to compare pointers to incompatible types.
• 0514 [C] Relational operator used to compare a pointer with an incompatible operand.