import { Effect } from "@effect/core/io/Effect/definition";
import { Stream } from "@effect/core/stream/Stream/definition";
/**
 * Returns the specified stream if the specified effectful condition is
 * satisfied, otherwise returns an empty stream.
 * @tsplus static effect/core/stream/Stream.Ops whenEffect
 * @tsplus location "@effect/core/stream/Stream/operations/whenEffect"
 */
export declare function whenEffect<R, E, R1, E1, A>(b: Effect<R, E, boolean>, stream: Stream<R1, E1, A>): Stream<R | R1, E | E1, A>;
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