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
16class X  {
17    public foo: number
18    private s: string
19
20    constructor (f: number) {
21        this.foo = f
22        this.s = ""
23    }
24
25    public say(): void {
26       console.log("X = ", this.foo)
27    }
28}
29
30class Y {
31    public foo: number
32
33    constructor (f: number) {
34        this.foo = f
35    }
36    public say(): void {
37        console.log("Y = ", this.foo)
38    }
39}
40
41function bar(z: X): void {
42    z.say()
43}
44
45bar(new X(1))
46bar(new Y(2) as X)