1/* 2 * Copyright (c) 2021-2024 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: 05.Generics 18name: 05.generics/genericTypeArgumentWithDefaultParameterValue_05 19tags: [] 20---*/ 21 22class Helper {} 23 24class A<T> { 25 data: T 26 isData: boolean 27 constructor(isData: boolean) { 28 this.isData = isData 29 } 30} 31 32class B<T> { 33 data: T 34 constructor(data: T) { 35 this.data = data 36 } 37 foo<T>(isData: boolean = false): A<T> { 38 return new A<T>(isData) 39 } 40} 41 42function main(): void { 43 let b = new B<String>("hello") 44 let a = b.foo<Helper>(); 45 assert a instanceof A 46 assert a.isData == false 47 a.data = new Helper() 48 assert a.data instanceof Helper 49} 50