when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. int? handshake,
    2. @JsonKey.new(name: 'connIdle') int? connectionIdle,
    3. int? uplinkOnly,
    4. int? downlinkOnly,
    5. bool? statsUserUplink,
    6. bool? statsUserDownlink,
    7. bool? statsUserOnline,
    8. int? bufferSize,
    )
)

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(
          int? handshake,
          @JsonKey(name: 'connIdle') int? connectionIdle,
          int? uplinkOnly,
          int? downlinkOnly,
          bool? statsUserUplink,
          bool? statsUserDownlink,
          bool? statsUserOnline,
          int? bufferSize)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _Policy():
      return $default(
          _that.handshake,
          _that.connectionIdle,
          _that.uplinkOnly,
          _that.downlinkOnly,
          _that.statsUserUplink,
          _that.statsUserDownlink,
          _that.statsUserOnline,
          _that.bufferSize);
    case _:
      throw StateError('Unexpected subclass');
  }
}