4503			An expression of 'essentially Boolean' type (%1s) is being used as the left-hand operand of this shift operator (%2s).
	Arithmetic type - Operands

/*PRQA S 1-9999 ++*/
/*PRQA S 4503 --*/

void f4503 (int a, _Bool b)
{
  (a != 0) << 1;            /* 4503 */
  
  b >> 1;                   /* 4503 */
}

See also:

• 4504 An expression of 'essentially Boolean' type (%1s) is being used as the right-hand operand of this shift operator (%2s).