import type { DeferredInternal } from "@effect/core/io/Fiber/_internal/runtime";
export declare const DeferredSym: unique symbol;
export type DeferredSym = typeof DeferredSym;
export declare const _E: unique symbol;
export type _E = typeof _E;
export declare const _A: unique symbol;
export type _A = typeof _A;
/**
 * A `Deferred` represents an asynchronous variable that can be set exactly
 * once, with the ability for an arbitrary number of fibers to suspend (by
 * calling `await`) and automatically resume when the variable is set.
 *
 * `Deferred` can be used for building primitive actions whose completions
 * require the coordinated action of multiple fibers, and for building
 * higher-level concurrent or asynchronous structures.
 *
 * @tsplus type effect/core/io/Deferred
 */
export interface Deferred<E, A> extends DeferredInternal<E, A> {
}
/**
 * @tsplus type effect/core/io/Deferred.Aspects
 */
export interface DeferredAspects {
}
/**
 * @tsplus type effect/core/io/Deferred.Ops
 */
export interface DeferredOps {
    readonly $: DeferredAspects;
}
export declare const Deferred: DeferredOps;
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