1/*
2 * Copyright (c) 2021-2024 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 A {
17    foo() : int {
18        return 1;
19    }
20}
21
22class B extends A {
23    override foo() : int {
24        return 2;
25    }
26}
27
28function main() : void {
29    let x : A = new A();
30    assert (x.foo() == 1)
31
32    let y : B = new B();
33    assert (y.foo() == 2)
34
35    let z : A = new B();
36    assert (z.foo() == 2)
37}
38