42 lines
1.1 KiB
TypeScript
42 lines
1.1 KiB
TypeScript
//// [functionSubtypingOfVarArgs.ts]
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class EventBase {
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private _listeners = [];
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add(listener: (...args: any[]) => void): void {
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this._listeners.push(listener);
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}
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}
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class StringEvent extends EventBase { // should work
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add(listener: (items: string) => void ) { // valid, items is subtype of args
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super.add(listener);
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}
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}
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//// [functionSubtypingOfVarArgs.js]
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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__.prototype = b.prototype;
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d.prototype = new __();
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};
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var EventBase = (function () {
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function EventBase() {
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this._listeners = [];
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}
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EventBase.prototype.add = function (listener) {
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this._listeners.push(listener);
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};
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return EventBase;
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})();
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var StringEvent = (function (_super) {
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__extends(StringEvent, _super);
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function StringEvent() {
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_super.apply(this, arguments);
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}
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StringEvent.prototype.add = function (listener) {
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_super.prototype.add.call(this, listener);
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};
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return StringEvent;
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})(EventBase);
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