1/*
2 * Copyright (c) 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 DataNode<Data> {
17    private data: Data|undefined = undefined
18    static attach<Data>(): int {
19        const node = new DataNode<Data>()
20        node.data = undefined
21        return 1
22    }
23}
24
25function main() {
26    assert DataNode.attach<Object>() == 1
27}
28