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Edit File: typed-events.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.StrictEventEmitter = void 0;
const events_1 = require("events");
/**
 * Strictly typed version of an `EventEmitter`. A `TypedEventEmitter` takes type
 * parameters for mappings of event names to event data types, and strictly
 * types method calls to the `EventEmitter` according to these event maps.
 *
 * @typeParam ListenEvents - `EventsMap` of user-defined events that can be
 * listened to with `on` or `once`
 * @typeParam EmitEvents - `EventsMap` of user-defined events that can be
 * emitted with `emit`
 * @typeParam ReservedEvents - `EventsMap` of reserved events, that can be
 * emitted by socket.io with `emitReserved`, and can be listened to with
 * `listen`.
 */
class StrictEventEmitter extends events_1.EventEmitter {
    /**
     * Adds the `listener` function as an event listener for `ev`.
     *
     * @param ev Name of the event
     * @param listener Callback function
     */
    on(ev, listener) {
        return super.on(ev, listener);
    }
    /**
     * Adds a one-time `listener` function as an event listener for `ev`.
     *
     * @param ev Name of the event
     * @param listener Callback function
     */
    once(ev, listener) {
        return super.once(ev, listener);
    }
    /**
     * Emits an event.
     *
     * @param ev Name of the event
     * @param args Values to send to listeners of this event
     */
    emit(ev, ...args) {
        return super.emit(ev, ...args);
    }
    /**
     * Emits a reserved event.
     *
     * This method is `protected`, so that only a class extending
     * `StrictEventEmitter` can emit its own reserved events.
     *
     * @param ev Reserved event name
     * @param args Arguments to emit along with the event
     */
    emitReserved(ev, ...args) {
        return super.emit(ev, ...args);
    }
    /**
     * Emits an event.
     *
     * This method is `protected`, so that only a class extending
     * `StrictEventEmitter` can get around the strict typing. This is useful for
     * calling `emit.apply`, which can be called as `emitUntyped.apply`.
     *
     * @param ev Event name
     * @param args Arguments to emit along with the event
     */
    emitUntyped(ev, ...args) {
        return super.emit(ev, ...args);
    }
    /**
     * Returns the listeners listening to an event.
     *
     * @param event Event name
     * @returns Array of listeners subscribed to `event`
     */
    listeners(event) {
        return super.listeners(event);
    }
}
exports.StrictEventEmitter = StrictEventEmitter;

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