import * as O from "../Option";
import { AtomicReference } from "../support/AtomicReference";
import type { Cause } from "../Task/Exit/Cause";
import { _A, _E, _I, _R, _U, TaskInstructionTag } from "../Task/Task/constants";
import type { Instruction, Task, URI } from "../Task/Task/model";
import type { XPure } from "./model";
export declare const XPureTaskIntegration: AtomicReference<O.Option<
   <R, E, A>(_: XPure<unknown, never, R, E, A>) => Task<R, E, A>
>>;
export declare class _FailInstruction<E> {
   readonly cause: Cause<E>;
   readonly _tag = TaskInstructionTag.Fail;
   readonly _S1: (_: unknown) => void;
   readonly _S2: () => never;
   readonly [_U]: URI;
   readonly [_R]: (_: unknown) => void;
   readonly [_E]: () => E;
   readonly [_A]: () => never;
   constructor(cause: Cause<E>);
   get [_I](): Instruction;
}
export declare const XPureIntegrationNotImplemented: _FailInstruction<unknown>;
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