when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. bool? enabled,
    2. int? concurrency,
    3. int? xudpConcurrency,
    4. String? xudpProxyUDP443,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs
TResult when<TResult extends Object?>(
  TResult Function(bool? enabled, int? concurrency, int? xudpConcurrency,
          String? xudpProxyUDP443)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _MuxConfig():
      return $default(_that.enabled, _that.concurrency, _that.xudpConcurrency,
          _that.xudpProxyUDP443);
    case _:
      throw StateError('Unexpected subclass');
  }
}