export declare class ZeroPromise<T = any> {
    private state;
    private controller;
    private resolveFn;
    private rejectFn;
    private promise;
    __isZeroPromise__: boolean;
    constructor();
    isActive(): boolean;
    isResolved(): boolean;
    isRejected(): boolean;
    isCancelled(): boolean;
    get signal(): AbortSignal;
    toActive(): this;
    resolve(value: T): void;
    reject(error: any): void;
    cancel(reason?: any): void;
    then<R1 = T, R2 = never>(onFulfilled?: (v: T) => R1 | PromiseLike<R1>, onRejected?: (e: any) => R2 | PromiseLike<R2>): Promise<R1 | R2>;
    catch<R = never>(onRejected?: (e: any) => R | PromiseLike<R>): Promise<T | R>;
    finally(onFinally?: () => void): Promise<T>;
    get [Symbol.toStringTag](): string;
}
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