4420			An expression of 'essentially enum' type (%1s) is being converted to Boolean type, '%2s' on assignment.
	Arithmetic type - Assignment

/*PRQA S 1-9999 ++*/
/*PRQA S 4420 --*/

enum E {ONE, TWO};

void foo (_Bool b);

_Bool f4420 (enum E a)
{
  _Bool boa = a;            /* 4420 */

  foo (ONE);                /* 4420 */

  boa = TWO;                /* 4420 */

  return a;                 /* 4420 */
}