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 CIterator implements Iterator<string> {
17
18  private ind_: int = 0;
19  private base_: C;
20
21  constructor (base: C) {
22    this.base_ = base;
23  }
24
25  override next(): IteratorResult<string> {
26    return {
27      done: this.base_[this.ind_].equals("none"),
28      value: this.base_[this.ind_++]
29    }
30  }
31}
32
33class C {
34  private y: string[] = ["one", "two", "three"];
35
36  $_get(ind: int) : string {
37    if (ind >= 0 && ind < 3) return this.y[ind];
38    return "none";
39  }
40
41  $_iterator(): CIterator {
42    return new CIterator(this);
43  }
44
45  $_set(ind: string, val: string): void  {
46    if (ind == "1") this.y[0] = val;
47    if (ind == "2") this.y[1] = val;
48    if (ind == "3") this.y[2] = val;
49  }
50
51}
52
53function foo(c: C): void {
54  c["2"] = 'ДВА!';
55}
56
57function main(): void {
58
59  let c = new C();
60  let i: int = 0;
61
62  for (let it of c) {
63    it += ": in for";
64
65    if (i == 0) {
66       assert(it == "one: in for");
67    } else if (i == 1) {
68       assert(it == "two: in for")
69    } else if (i == 2) {
70       assert(it == "three: in for")
71    } else {
72       assert(false);
73    }
74
75    ++i;
76  }
77
78  foo(c);
79
80  i = 0;
81  let it: string = "init";
82  for (it of c) {
83    it += ": after foo";
84
85    if (i == 0) {
86       assert(it == "one: after foo");
87    } else if (i == 1) {
88       assert(it == "ДВА!: after foo")
89    } else if (i == 2) {
90       assert(it == "three: after foo")
91    } else {
92       assert(false);
93    }
94
95    ++i;
96  }
97}
98