when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>({ required TResult bytes(double value), required TResult kb(double value), required TResult mb(double value), required TResult gb(double value), required TResult tb(double value), })

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?>({
  required TResult Function(double value) bytes,
  required TResult Function(double value) kb,
  required TResult Function(double value) mb,
  required TResult Function(double value) gb,
  required TResult Function(double value) tb,
}) {
  final _that = this;
  switch (_that) {
    case BytesModel():
      return bytes(_that.value);
    case KbModel():
      return kb(_that.value);
    case MbModel():
      return mb(_that.value);
    case GbModel():
      return gb(_that.value);
    case TbModel():
      return tb(_that.value);
  }
}