• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1/*
2 * Copyright (c) 2024-2025 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: 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    assertTrue( ra1 instanceof UserType)
73    assertTrue( ra2 instanceof UserType)
74    assertTrue( ra3 instanceof string)
75
76    assertTrue( ra11 instanceof UserName)
77    assertTrue( ra21 instanceof UserName)
78    assertTrue( ra31 instanceof string)
79}
80
81