1/* 2 * Copyright (c) 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_06 19tags: [] 20---*/ 21 22class UserType { 23 name: string 24} 25 26class UserName { 27 name : string 28} 29 30interface I<T = UserType, T1 = UserName> { 31 foo(p: T) : T 32} 33 34class A : implements I { 35 data: T 36 data1: T1 37 constructor(p: T, p1: T1) { 38 this.data = p.type 39 this.data1 = p1.name 40 } 41 42 foo(p : T) : T { 43 return data; 44 } 45 46 bar(p : T1) : T1 { 47 return data1; 48 } 49} 50 51class B : extends A {} 52 53 54function main(): void { 55 let a1 = new A(); 56 let a2 = new A<UserType, UserName>(); 57 let a3 = new A<string, string>; 58 59 let b1 = new B(); 60 let b2 = new B<UserType>(); 61 let b3 = new B<string>; 62 63 64 let ra1 = a1.foo(new UserType(), new UserName()); 65 let ra2 = a2.foo(new UserType(), new UserName()); 66 let ra3 = a3.foo("hello", "world") 67 68 let ra11 = a1.bar(new UserType(), new UserName()); 69 let ra21 = a2.bar(new UserType(), new UserName()); 70 let ra31 = a3.bar("hello", "world") 71 72 assert ra1 instanceof UserType 73 assert ra2 instanceof UserType 74 assert ra3 instanceof string 75 76 assert ra11 instanceof UserName 77 assert ra21 instanceof UserName 78 assert ra31 instanceof string 79} 80