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 16class A { 17 name = c'A' 18} 19class B extends A { 20 name = c'B' 21} 22class C extends B { 23 name = c'C'; 24} 25 26function clear_accumlator_type(As: FixedArray<A>): FixedArray<A> { 27 return As; 28} 29 30function main() { 31 { 32 let As: FixedArray<A> = new C[1]; 33 As[0] = new C(); 34 35 As = clear_accumlator_type(As); // workaround for: 36 // Verifier warning 22: Redundant check cast 37 // Accumulator type 'C[]' is always a subtype of 'FixedArray<B>'. Checkcast is redundant here. 38 // It may be a sign of possible error here. 39 let Bs: FixedArray<B> = As as FixedArray<B>; 40 assertEQ(Bs[0].name, c'B') 41 } 42 43 { 44 let caught = false; 45 try { 46 let As: FixedArray<A> = new A[1]; 47 let Bs = As as FixedArray<B>; 48 } catch (e: ClassCastError) { 49 caught = true; 50 } catch (e) { 51 assertTrue(false) 52 } 53 assertTrue(caught) 54 } 55} 56