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
16function id<T>(v: Object): T {
17    return v as T
18}
19
20function main() {
21    let s = id<"a"|"b"|"c">("d")
22    if (s == "d") {
23        console.log(s)
24    }
25}
26
27/* @@? 22:9 Error TypeError: Operator '==' cannot be applied to types '"a"|"b"|"c"' and '"d"'. */
28