maybeMap<TResult extends Object?> method

@optionalTypeArgs TResult maybeMap<TResult extends Object?>({ TResult network(MyNetworkImage value)?, TResult base64(MyBase64Image value)?, TResult filePath(MyFilePathImage value)?, TResult asset(MyAssetImage value)?, required TResult orElse(), })

A variant of map that fallback to returning orElse.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  TResult Function(MyNetworkImage value)? network,
  TResult Function(MyBase64Image value)? base64,
  TResult Function(MyFilePathImage value)? filePath,
  TResult Function(MyAssetImage value)? asset,
  required TResult orElse(),
}) {
  final _that = this;
  switch (_that) {
    case MyNetworkImage() when network != null:
      return network(_that);
    case MyBase64Image() when base64 != null:
      return base64(_that);
    case MyFilePathImage() when filePath != null:
      return filePath(_that);
    case MyAssetImage() when asset != null:
      return asset(_that);
    case _:
      return orElse();
  }
}