1/*
2 * Copyright (c) 2023-2024 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 Foo<T> {
17    then<U>(): Foo<U> | null {
18        return null;
19    }
20
21    public value: T;
22}
23
24class A<T> {
25    bar(): A<T> | null {
26        return null;
27    }
28
29    baz(): Foo<T> | null{
30        return null;
31    }
32}
33
34function bar(p: Foo<Object>): void {
35    let p1: Foo<Object> | null = p.then<Object>();
36    let p2: Foo<A<A<Object>>> = new Foo<A<A<Object>>>();
37    p1 = p2.value.bar()!.baz()!.then<Object>();
38}
39