whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. int? rand,
    2. XrayInt32Range? randRange,
    3. String? capture,
    4. String? type,
    5. String? reuse,
    6. CustomTransform? transform,
    7. Object? packet,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

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

Implementation

@optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  TResult? Function(
          int? rand,
          XrayInt32Range? randRange,
          String? capture,
          String? type,
          String? reuse,
          CustomTransform? transform,
          Object? packet)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _UDPItem() when $default != null:
      return $default(_that.rand, _that.randRange, _that.capture, _that.type,
          _that.reuse, _that.transform, _that.packet);
    case _:
      return null;
  }
}