export interface Subscription {
    closed?: boolean;
    unsubscribe(): void;
}
export interface NextObserver<T> {
    closed?: boolean;
    next: (value: T) => void;
    error?: (reason: any) => void;
    complete?: () => void;
    start?: (subscription: Subscription) => void;
}
export interface ErrorObserver<T> {
    closed?: boolean;
    next?: (value: T) => void;
    error: (reason: any) => void;
    complete?: () => void;
    start?: (subscription: Subscription) => void;
}
export interface CompletionObserver<T> {
    closed?: boolean;
    next?: (value: T) => void;
    error?: (reason: any) => void;
    complete: () => void;
    start?: (subscription: Subscription) => void;
}
export declare type PartialObserver<T> = NextObserver<T> | ErrorObserver<T> | CompletionObserver<T>;
export interface SubscriptionObserver<T> {
    closed?: boolean;
    next: (value: T) => void;
    error: (reason: any) => void;
    complete: () => void;
}
export declare type Disposer = void | (() => void) | ({
    unsubscribe: () => void;
}) | Subscription;
export declare type Subscriber<T> = (observer: SubscriptionObserver<T>) => Disposer;
export interface Subscribable<T> {
    closed?: boolean;
    subscribe(next?: PartialObserver<T> | ((value: T) => void), error?: (reason: any) => void, complete?: () => void): Subscription;
}
export declare type Unary<T, R> = (arg: T) => R;
export declare const enum SignalType {
    next = 0,
    error = 1,
    complete = 2
}
export declare type ArrayValues<TS extends any[]> = TS extends Array<infer T> ? T : void;