4447			A constant expression of 'essentially unsigned' type (%1s) is being converted to signed type, '%2s' on assignment.
	Arithmetic type - Assignment

/*PRQA S 1-9999 ++*/
/*PRQA S 4447,1291 --*/

void foo (int b);

int f4447 (void)
{
  int sia = (1u + 1u);      /* 4447 */

  foo (2u * 3u);            /* 4447 */

  foo (1u);                 /* 1291 */

  sia = (~0u);              /* 4447 */

  return (+0u);             /* 4447 */
}

See also:

• 1291 An integer constant of 'essentially unsigned' type is being converted to signed type on assignment.