[previous] 1820 [next] The %1s operand is non-constant and 'essentially signed' (%2s) but will be implicitly converted to an unsigned type (%3s) in this arithmetic operation.
Arithmetic type - Balancing

This message is issued whenever a non-constant expression of essentially signed type has been used as an operand of a binary arithmetic operator, and undergoes a usual arithmetic conversion to an unsigned integer type (the type of the other operand).

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 1820 --*/

unsigned f1820 (int a, unsigned b)
{
  b = b + a;                /* 1820 */

  return ((a - 1) + b);     /* 1820 */
}

QA·C Source Code Analyser 8.1.2
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