import { Effect } from "@effect/core/io/Effect/definition";
import { Either } from "@tsplus/stdlib/data/Either/definition";
/**
 * Maps the success value of this effect to a left value.
 * @tsplus fluent ets/Effect asLeft
 * @tsplus location "@effect/core/io/Effect/operations/asLeft"
 */
export declare function asLeft<R, E, A>(self: Effect<R, E, A>, __tsplusTrace?: string): Effect<R, E, Either<A, never>>;
//# sourceMappingURL=asLeft.d.ts.map