13af6ab5fSopenharmony_ci/*
23af6ab5fSopenharmony_ci * Copyright (c) 2024 Huawei Device Co., Ltd.
33af6ab5fSopenharmony_ci * Licensed under the Apache License, Version 2.0 (the "License");
43af6ab5fSopenharmony_ci * you may not use this file except in compliance with the License.
53af6ab5fSopenharmony_ci * You may obtain a copy of the License at
63af6ab5fSopenharmony_ci *
73af6ab5fSopenharmony_ci * http://www.apache.org/licenses/LICENSE-2.0
83af6ab5fSopenharmony_ci *
93af6ab5fSopenharmony_ci * Unless required by applicable law or agreed to in writing, software
103af6ab5fSopenharmony_ci * distributed under the License is distributed on an "AS IS" BASIS,
113af6ab5fSopenharmony_ci * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
123af6ab5fSopenharmony_ci * See the License for the specific language governing permissions and
133af6ab5fSopenharmony_ci * limitations under the License.
143af6ab5fSopenharmony_ci */
153af6ab5fSopenharmony_ci
163af6ab5fSopenharmony_ciinterface I {}
173af6ab5fSopenharmony_ciclass A implements I {}
183af6ab5fSopenharmony_ciclass B implements I {}
193af6ab5fSopenharmony_ci
203af6ab5fSopenharmony_cifunction clear_accumlator_type(Is: I[]): I[] {
213af6ab5fSopenharmony_ci  return Is;
223af6ab5fSopenharmony_ci}
233af6ab5fSopenharmony_ci
243af6ab5fSopenharmony_cifunction main() {
253af6ab5fSopenharmony_ci  let As: A[] = new A[1];
263af6ab5fSopenharmony_ci  let Is: I[] = As as I[];
273af6ab5fSopenharmony_ci
283af6ab5fSopenharmony_ci  let caught = false;
293af6ab5fSopenharmony_ci  try {
303af6ab5fSopenharmony_ci    Is = clear_accumlator_type(Is); // workaround for:
313af6ab5fSopenharmony_ci    // Verifier warning 24: Impossible array check cast
323af6ab5fSopenharmony_ci    // Element type in array in accumulator is of incompatible type 'A'.
333af6ab5fSopenharmony_ci    // Instruction 'checkcast' will always throw an exception here. It may be a sign of possible error here.
343af6ab5fSopenharmony_ci    let Bs: B[] = Is as B[];
353af6ab5fSopenharmony_ci  } catch (e: ClassCastError) {
363af6ab5fSopenharmony_ci    caught = true;
373af6ab5fSopenharmony_ci  } catch (e) {
383af6ab5fSopenharmony_ci    assert false;
393af6ab5fSopenharmony_ci  }
403af6ab5fSopenharmony_ci  assert caught;
413af6ab5fSopenharmony_ci
423af6ab5fSopenharmony_ci  Is = clear_accumlator_type(Is); // workaround for:
433af6ab5fSopenharmony_ci  // Verifier warning 24: Impossible array check cast
443af6ab5fSopenharmony_ci  // Element type in array in accumulator is of incompatible type 'B'.
453af6ab5fSopenharmony_ci  // Instruction 'checkcast' will always throw an exception here. It may be a sign of possible error here.
463af6ab5fSopenharmony_ci  let As2 = Is as A[];
473af6ab5fSopenharmony_ci}
483af6ab5fSopenharmony_ci
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