maybeWhen<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeWhen<TResult extends Object?>({
  1. TResult idle()?,
  2. TResult loading()?,
  3. TResult error(
    1. Object error
    )?,
  4. TResult success(
    1. T? value
    )?,
  5. required TResult orElse(),
})

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>({TResult Function()?  idle,TResult Function()?  loading,TResult Function( Object error)?  error,TResult Function( T? value)?  success,required TResult orElse(),}) {final _that = this;
switch (_that) {
case DataStateIdle() when idle != null:
return idle();case DataStateLoading() when loading != null:
return loading();case DataStateError() when error != null:
return error(_that.error);case DataStateSuccess() when success != null:
return success(_that.value);case _:
  return orElse();

}
}