transf<R extends Object> method

@override Result<R> transf<R extends Object>([ @noFutures R noFutures(T e)? ])

Transforms the Outcome's generic type from T to R.

Uses the transformer function noFutures if provided, otherwise attempts a direct cast.

Implementation

@override
Result<R> transf<R extends Object>([@noFutures R Function(T e)? noFutures]) {
  try {
    final a = unwrap();
    final b = noFutures?.call(a) ?? a as R;
    return Ok(b);
  } catch (error, stackTrace) {
    assert(false, error);
    return Err('Cannot transform $T to $R.', stackTrace: stackTrace);
  }
}