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declare type PromiseState = 'pending' | 'fulfilled' | 'rejected';
declare type Executor<Value> = ConstructorParameters<typeof Promise<Value>>[0];
declare type ResolveFunction<Value> = Parameters<Executor<Value>>[0];
declare type RejectFunction<Reason> = Parameters<Executor<Reason>>[1];
declare type DeferredPromiseExecutor<Input = never, Output = Input> = {
(resolve?: ResolveFunction<Input>, reject?: RejectFunction<any>): void;
resolve: ResolveFunction<Input>;
reject: RejectFunction<any>;
result?: Output;
state: PromiseState;
rejectionReason?: unknown;
};
declare function createDeferredExecutor<Input = never, Output = Input>(): DeferredPromiseExecutor<Input, Output>;
declare class DeferredPromise<Input, Output = Input> extends Promise<Input> {
#private;
resolve: ResolveFunction<Output>;
reject: RejectFunction<Output>;
constructor(executor?: Executor<Input> | null);
get state(): PromiseState;
get rejectionReason(): unknown;
then<ThenResult = Input, CatchResult = never>(onFulfilled?: (value: Input) => ThenResult | PromiseLike<ThenResult>, onRejected?: (reason: any) => CatchResult | PromiseLike<CatchResult>): DeferredPromise<ThenResult | CatchResult, Output>;
catch<CatchResult = never>(onRejected?: (reason: any) => CatchResult | PromiseLike<CatchResult>): DeferredPromise<Input | CatchResult, Output>;
finally(onfinally?: () => void | Promise<any>): DeferredPromise<Input, Output>;
}
export { DeferredPromise, DeferredPromiseExecutor, Executor, PromiseState, RejectFunction, ResolveFunction, createDeferredExecutor };
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