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1/*
2 * Copyright (c) 2023-2025 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
16abstract class A {
17    str: string = "A"
18
19    getA():string {
20        return this.str;
21    }
22}
23
24abstract class B extends A {
25    getB():string {
26        return this.str;
27    }
28
29    public get_str(): string {
30        return this.str;
31    }
32
33    public get_super_str(): string {
34        return super.getA();
35    }
36}
37
38class BB extends B {}
39
40abstract class C extends B {
41    str: string = "C"
42
43    public override get_str(): string {
44        return this.str;
45    }
46
47    public override get_super_str(): string {
48        return super.getB();
49    }
50}
51
52class CC extends C {}
53
54function main(): void {
55  let b: B = new BB();
56  let c: C = new CC();
57
58  assertEQ(b.str, "A")
59  assertEQ(b.get_str(), "A")
60  assertEQ(b.get_super_str(), "A")
61  assertEQ(c.str, "C")
62  assertEQ(c.get_str(), "C")
63  assertEQ(c.get_super_str(), "A")
64
65  assertEQ((b as B).str, "A")
66  assertEQ((b as A).str, "A")
67  assertEQ((b as B).get_str(), "A")
68  assertEQ((b as B).get_super_str(), "A")
69
70  assertEQ((c as C).str, "C")
71  assertEQ((c as B).str, "A")
72  assertEQ((c as A).str, "A")
73
74  assertEQ((c as C).get_str(), "C")
75  assertEQ((c as C).get_super_str(), "A")
76  assertEQ((c as B).get_str(), "C")
77  assertEQ((c as B).get_super_str(), "A")
78}
79