PHP 枚举类型的管理与设计知识点总结(2)

$user->banned = '非法值'; // 可能不会报错

$yes = new BoolEnum("非法值"); // 将会抛出异常

$user->banned = $yes;

function setUserStatus(BoolEnum $boolEnum){

  $user->banned = $boolEnum;

}