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1/*
2 * Copyright (c) 2025 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{
17  field1:int;
18  field2:int;
19  method1(){};
20}
21
22function foo(c: "abcd"|A|(keyof A)):string {
23  if (c == "field1")  {
24    assertEQ(c, "field1")
25    return "Case 1";
26  } else if (c == "abcd") {
27    assertEQ(c, "abcd")
28    return "Case 2";
29  } else if (c instanceof A) {
30    assertEQ(c.field1, 0)
31    return "Case 3";
32  } else {
33    return "Case 4";
34  }
35}
36
37class Action{
38  type:keyof A = "field1"
39}
40
41function reducer(action:Action):string{
42  switch(action.type){
43    case "field1":
44      return "Case 1";
45    case "field2":
46      return "Case 2"
47    case "method1":
48      return "Case 3"
49    default:
50      return "Case 4";
51  }
52}
53
54function main(): void {
55  assertEQ(foo("field1"), "Case 1");
56  assertEQ(foo("abcd"), "Case 2");
57  assertEQ(foo(new A()), "Case 3");
58
59  assertEQ(reducer({type:"field1"}), "Case 1");
60  assertEQ(reducer({type:"field2"}), "Case 2");
61  assertEQ(reducer({type:"method1"}), "Case 3");
62}
63