export type Listener<S> = (state: S, prevState: S) => void;
export type Selector<S, Selected> = (state: S) => Selected;
export type EqualityFn<T = unknown> = (a: T, b: T) => boolean;
/**
 * Minimum store API required for subscription.
 */
export type SubscribableStore = {
    subscribe(selector: Selector<unknown, unknown>, listener: () => void, options?: SubscribeOptions<unknown>): UnsubscribeFn;
};
export type SubscribeOptions<Selected> = {
    equalityFn?: EqualityFn<Selected>;
    fireImmediately?: boolean;
};
export type ListenerArgs<S> = [listener: Listener<S>];
export type SelectorArgs<S, Selected> = [
    selector: Selector<S, Selected>,
    listener: Listener<Selected>,
    options?: SubscribeOptions<Selected>
];
export type SubscribeArgs<S, Selected = unknown> = ListenerArgs<S> | SelectorArgs<S, Selected>;
export type UnsubscribeFn = () => void;
export type SubscribeFn<S, Selected = S> = (...args: SubscribeArgs<S, Selected>) => UnsubscribeFn;
export type SubscribeOverloads<S> = {
    (listener: Listener<S>): UnsubscribeFn;
    <Selected>(selector: Selector<S, Selected>, listener: Listener<Selected>, options?: SubscribeOptions<Selected>): UnsubscribeFn;
};
//# sourceMappingURL=subscribe.d.ts.map