QA·C Help - 4522

	4522	An expression of 'essentially enum' type (%1s) is being used as the %2s operand of this bitwise operator (%3s).

Arithmetic type - Operands

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

For example:


/*PRQA S 1-9999 ++*/
/*PRQA S 4522-4524 --*/

enum E {ONE, TWO};

void f4522 (enum E a)
{
  a & 1u;                   /* 4522 */
  
  ONE | 1u;                 /* 4522 */
  
  ~a;                       /* 4522 */

  a >> 1u;                  /* 4523 */

  1u << TWO;                /* 4524 */
}

MISRA C:2012 Rules applicable to message 4522:

Rule-10.1 (Required)

Operands shall not be of an inappropriate essential type.

See also:

4523 An expression of 'essentially enum' type (%1s) is being used as the left-hand operand of this shift operator (%2s).
4524 An expression of 'essentially enum' type (%1s) is being used as the right-hand operand of this shift operator (%2s).

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MISRA C:2012 Compliance Module 1.0
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