export interface SyncInspectablePromise<T> extends Promise<T> {
    status: PromiseStatus;
    value?: T;
    reason?: unknown;
}
export interface SyncInspectableDeferred<T> {
    promise: SyncInspectablePromise<T>;
    resolve: (value: T | PromiseLike<T>) => void;
    reject: (reason: unknown) => void;
}
export declare const PromiseStatus: {
    readonly PENDING: "pending";
    readonly FULFILLED: "fulfilled";
    readonly REJECTED: "rejected";
};
export type PromiseStatus = (typeof PromiseStatus)[keyof typeof PromiseStatus];
export type PromiseState<T> = {
    status: typeof PromiseStatus.PENDING;
} | {
    status: typeof PromiseStatus.FULFILLED;
    value: T;
} | {
    status: typeof PromiseStatus.REJECTED;
    reason: unknown;
};
export declare function inspect<T>(promise: SyncInspectablePromise<T>): PromiseState<T>;
export declare function resolve<T>(value: T): SyncInspectablePromise<Awaited<T>>;
export declare function reject(error: unknown): SyncInspectablePromise<never>;
export declare function defer<T>(): SyncInspectableDeferred<T>;
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