Function unfold

packages/effect/src/internal/stream.ts:7402–7403

(s: S, f: (s: S) => Option.Option<readonly [A, S]>)

/** @internal */
export const unfold = <S, A>(s: S, f: (s: S) => Option.Option<readonly [A, S]>): Stream.Stream<A> =>
  unfoldChunk(s, (s) => pipe(f(s), Option.map(([a, s]) => [Chunk.of(a), s])))

/** @internal */
export const unfoldChunk = <S, A>(