[previous] 1831 [next] The %1s operand is constant, 'essentially signed' (%2s) and negative but will be implicitly converted to an unsigned type (%3s) in this bitwise operation.
Arithmetic type - Balancing

This message is issued whenever a constant expression of essentially signed type with a negative value has been used as an operand of either &, | or ^ operators, and undergoes a usual arithmetic conversion to an unsigned integer type (the type of the other operand). This will result in a large positive value.

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 1831 --*/

unsigned f1831 (unsigned b)
{
  b = b & (-1);             /* 1831 */

  return ((1 - 2) | b);     /* 1831 */
}

QA·C Source Code Analyser 8.1.2
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