export type Listener<T = void> = (payload: T) => void;
export type Listen<T = void> = (listener: Listener<T>) => VoidFunction;
export type Emit<T = void> = (..._: void extends T ? [payload?: T] : [payload: T]) => void;
export declare class EventBusCore<T> extends Set<Listener<T>> {
    emit(..._: void extends T ? [payload?: T] : [payload: T]): void;
}
export interface EventBus<T> {
    readonly listen: Listen<T>;
    readonly emit: Emit<T>;
    readonly clear: VoidFunction;
}
/**
 * Provides a simple way to listen to and emit events. All listeners are automatically unsubscribed on cleanup.
 *
 * @returns the emitter: `{listen, emit, clear}`
 *
 * @see https://github.com/solidjs-community/solid-primitives/tree/main/packages/event-bus#createEventBus
 *
 * @example
const bus = createEventBus<string>();
// bus can be destructured:
const { listen, emit, clear } = bus;

const unsub = bus.listen((a) => console.log(a));

bus.emit("foo");

// unsub gets called automatically on cleanup
unsub();
 */
export declare function createEventBus<T>(): EventBus<T>;