maybeWhen<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeWhen<TResult extends Object?>({
  1. TResult mentionRule(
    1. MentionRule data
    )?,
  2. TResult followerRule(
    1. FollowerRule data
    )?,
  3. TResult followingRule(
    1. FollowingRule data
    )?,
  4. TResult listRule(
    1. ListRule data
    )?,
  5. TResult unknown(
    1. Map<String, dynamic> data
    )?,
  6. required TResult orElse(),
})

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>({TResult Function( MentionRule data)?  mentionRule,TResult Function( FollowerRule data)?  followerRule,TResult Function( FollowingRule data)?  followingRule,TResult Function( ListRule data)?  listRule,TResult Function( Map<String, dynamic> data)?  unknown,required TResult orElse(),}) {final _that = this;
switch (_that) {
case UFeedThreadgateAllowMentionRule() when mentionRule != null:
return mentionRule(_that.data);case UFeedThreadgateAllowFollowerRule() when followerRule != null:
return followerRule(_that.data);case UFeedThreadgateAllowFollowingRule() when followingRule != null:
return followingRule(_that.data);case UFeedThreadgateAllowListRule() when listRule != null:
return listRule(_that.data);case UFeedThreadgateAllowUnknown() when unknown != null:
return unknown(_that.data);case _:
  return orElse();

}
}