Function reduceEffect

packages/effect/src/Sink.ts:1426–1429

(
  initial: LazyArg<S>,
  f: (s: S, input: In) => Effect.Effect<S, E, R>
)

 * @since 4.0.0
 */
export const reduceEffect = <S, In, E, R>(
  initial: LazyArg<S>,
  f: (s: S, input: In) => Effect.Effect<S, E, R>
): Sink<S, In, never, E, R> => reduceWhileEffect(initial, constTrue, f) as any

const head_ = reduceWhile(Option.none<unknown>, Option.isNone, (_, in_) => Option.some(in_))