1/*
2 * Copyright (c) 2022-2024 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
16
17interface A {
18    a: number
19}
20
21interface B extends A {
22    b: number,
23}
24
25interface C extends A {
26    c: string
27}
28
29interface D extends B, C {
30    d: [number, number];
31}
32
33var d: D;
34var a: A;
35
36a = d;
37d = a;
38
39/* @@? 37:1 Error TypeError: Type 'A' is not assignable to type 'D'.  */
40