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// @ts-nocheck
16declare function print(a:any):string;
17
18class C {
19    x:number;
20    constructor() {
21        this.x = 1;
22    }
23}
24
25class D extends C {
26    y:number;
27    constructor() {
28        super();
29        this.y = 2;
30    }
31}
32
33function foo(o:D) {
34    print(o.x);
35}
36
37let d = new D();
38foo(d);
39
40d = {};
41foo(d);
42
43d = 1;
44foo(d);
45
46try {
47    d = undefined;
48    foo(d);
49} catch(e) {
50    print(e instanceof TypeError);
51}
52
53