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 X { }
17function id<T extends string | number | X>(x: T) { return x }
18
19function id_s(x: string) { return id(x) }
20function id_sx(x: string | X) { return id(x) }
21
22function main() {
23    let x = new X();
24
25    assert(id(1.1) == 1.1);
26    assert(id("a") == "a");
27    assert(id(x) == x);
28
29    assert(id_s("a") == "a");
30    assert(id_sx(x) == x);
31}
32