import { Stream } from "@effect/core/stream/Stream/definition";
import { Either } from "@tsplus/stdlib/data/Either/definition";
/**
 * Terminates the stream when encountering the first `Right`.
 * @tsplus fluent ets/Stream collectWhileLeft
 * @tsplus location "@effect/core/stream/Stream/operations/collectWhileLeft"
 */
export declare function collectWhileLeft<R, E, L, A>(self: Stream<R, E, Either<L, A>>, __tsplusTrace?: string): Stream<R, E, L>;
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