52 lines
1.7 KiB
TypeScript
52 lines
1.7 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 () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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var EventBase = /** @class */ (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 = /** @class */ (function (_super) {
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__extends(StringEvent, _super);
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function StringEvent() {
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return _super !== null && _super.apply(this, arguments) || this;
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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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