1
2/*
3 * Copyright (c) 2023-2024 Huawei Device Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17class Bar {
18    cb: (() => int) | undefined = () => { return 3 };
19}
20
21function foo(a: Int | null): (() => Int) | undefined {
22    let cb: () => Int = () => { return a!; };
23    return a != null ? cb : undefined;
24}
25
26function main(): void {
27    let a = new Int(3);
28    // assert foo(a)?.() == 3; // bug
29    assert foo(a)?.() == a;
30
31    assert foo(null)?.() == null;
32    assert null == foo(null)?.();
33
34    assert foo(null)?.() == undefined;
35    assert undefined == foo(null)?.();
36
37    assert new Int(3) != foo(null)?.();
38
39    let b = new Bar();
40    assert b.cb?.() == 3;
41    b.cb = undefined;
42    assert b.cb?.() == undefined;
43}
44