[previous] 4570 [next] The operand of this ~ operator has an 'essential type' which is narrower than type 'int'.
Arithmetic type - Operands

This message is issued whenever an expression of essential type narrower than int has been used as the operand of the ~ operator.

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 4570 --*/

unsigned char f4570 (unsigned char a)
{
  return ~a;                /* 4570 */
}

For the purposes of QA·C conversion messages, types are ordered according to the configured size (-s option), by default; hence for a typical 32 bit configuration, types int and long will be considered equivalent. However, when the -strictrank option is specified, types will be ordered according to their rank; consequently int will be considered narrower than long.

QA·C Source Code Analyser 8.1.2
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