[previous] 4340 [next] An expression of 'essentially unsigned' type (%1s) is being cast to Boolean type '%2s'.
Arithmetic type - Casts

This message is issued whenever an expression of essentially unsigned type has been cast to Boolean type.

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 4340 --*/

void foo (_Bool b);

_Bool f4340 (unsigned short a)
{
  foo ((_Bool) a);          /* 4340 */

  foo ((_Bool) (a + 1u));   /* 4340 */

  return ((_Bool) a);       /* 4340 */
}

MISRA C:2012 Rules applicable to message 4340:

Rule-10.5  (Advisory) The value of an expression should not be cast to an inappropriate essential type

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