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 A {}
17class B<T> {} 
18
19declare type Nullable<T> = T | undefined;
20type MyType<T> = B<T> | undefined;
21
22class C {
23  c: number;
24}
25
26@Sendable
27class D {
28  a: Nullable<A>; // NOT OK
29  b: Nullable<C> = new C(); // NOT OK
30  c: Nullable<number> = 1; // OK
31  d: MyType<number>; // NOT OK
32}
33
34let d = new D();
35