1/* 2 * Copyright (c) 2024-2025 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 16interface I {} 17class A implements I {} 18class B implements I {} 19 20function clear_accumlator_type(Is: FixedArray<I>): FixedArray<I> { 21 return Is; 22} 23 24function main() { 25 let As: FixedArray<A> = new A[1]; 26 let Is: FixedArray<I> = As as FixedArray<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: FixedArray<B> = Is as FixedArray<B>; 35 } catch (e: ClassCastError) { 36 caught = true; 37 } catch (e) { 38 assertTrue(false) 39 } 40 assertTrue(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 FixedArray<A>; 47} 48 49