/**
 * Returns the resulting stream when the given partial function is defined
 * for the given effectful value, otherwise returns an empty stream.
 *
 * @tsplus static effect/core/stream/Stream.Ops whenCaseEffect
 */
export function whenCaseEffect<R, E, A, R1, E1, A1>(
  a: Effect<R, E, A>,
  pf: (a: A) => Maybe<Stream<R1, E1, A1>>
): Stream<R | R1, E | E1, A1> {
  return Stream.fromEffect(a).flatMap((a) => pf(a).getOrElse(Stream.empty))
}