[previous] 4558 [next] An expression of 'essentially unsigned' type (%1s) is being used as the %2s operand of this logical operator (%3s).
Arithmetic type - Operands

This message is issued whenever an expression of essentially unsigned type has been used as an operand of a logical operator.

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 4558 --*/

void f4558 (unsigned a, _Bool b)
{
  if (a && b)               /* 4558 */
  {
  }
  
  if (a || !a)              /* 4558 x2 */
  {
  }
}

MISRA C:2012 Rules applicable to message 4558:

Rule-10.1  (Required) Operands shall not be of an inappropriate essential type.

QA·C Source Code Analyser 8.1
MISRA C:2012 Compliance Module 1.0
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