1/* 2 * Copyright (c) 2022-2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16/*--- 17desc: 09.classes/constructor-inheritance 18tags: [] 19---*/ 20 21 class Base { 22 age: int; 23 name: string; 24 constructor(param0: string = "Hello", param1: int = 42) { 25 this.name = param0; 26 this.age = param1; 27 } 28 } 29 30 class Derive extends Base {} 31 class Derive2 extends Derive {} 32 33 function main(): void { 34 let b = new Derive2(); 35 assertEQ( b.age, 42) 36 assertTrue( b.name = "Hello") 37 38 b = new Derive("Greetings"); 39 assertEQ( b.age, 42) 40 assertTrue( b.name = "Greetings") 41 } 42