import type { Option } from "../../../Option";
import type { Cause } from "../../Exit/Cause";
import * as T from "../../Task";
export declare type Pull<R, E, O> = T.Task<R, Option<E>, ReadonlyArray<O>>;
export declare const end: T.EIO<Option<never>, never>;
export declare const fail: <E>(e: E) => T.EIO<Option<E>, never>;
export declare const halt: <E>(e: Cause<E>) => T.Task<unknown, Option<E>, never>;
export declare const empty: <A>() => T.IO<readonly A[]>;
export declare const emit: <A>(a: A) => T.IO<A[]>;
export declare const emitArray: <A>(as: readonly A[]) => T.IO<readonly A[]>;
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