1/* 2 * Copyright (c) 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 extends B { 17 foo1():int{} 18} 19 20class B extends A { 21 foo2():int{} 22} 23 24class C extends A { 25 foo1(){ 26 return 1; 27 } 28 foo2(){ 29 return 2; 30 } 31} 32 33/* @@? 16:7 Error TypeError: Cyclic inheritance involving A. */ 34 35