1/*
2 * Copyright (c) 2023 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
16declare function print(arg:any):string;
17
18class A {
19    run() {
20      print("A.run")
21    }
22}
23  
24class B extends A {
25    run() {
26        print("B.run")
27    }
28}
29  
30class C	{
31    obj: A
32    constructor(obj: A) {
33        this.obj = obj
34    }
35    
36    foo() {
37        this.obj.run()
38    }
39}
40let b = new B()
41let c = new C(b)
42c.foo();