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
16interface I {}
17class A implements I {}
18class B implements I {}
19
20function clear_accumlator_type(Is: I[]): I[] {
21  return Is;
22}
23
24function main() {
25  let As: A[] = new A[1];
26  let Is: I[] = As as I[];
27
28  let caught = false;
29  try {
30    Is = clear_accumlator_type(Is); // workaround for:
31    // Verifier warning 24: Impossible array check cast
32    // Element type in array in accumulator is of incompatible type 'A'.
33    // Instruction 'checkcast' will always throw an exception here. It may be a sign of possible error here.
34    let Bs: B[] = Is as B[];
35  } catch (e: ClassCastError) {
36    caught = true;
37  } catch (e) {
38    assert false;
39  }
40  assert caught;
41
42  Is = clear_accumlator_type(Is); // workaround for:
43  // Verifier warning 24: Impossible array check cast
44  // Element type in array in accumulator is of incompatible type 'B'.
45  // Instruction 'checkcast' will always throw an exception here. It may be a sign of possible error here.
46  let As2 = Is as A[];
47}
48
49