13af6ab5fSopenharmony_ci/** 23af6ab5fSopenharmony_ci * Copyright (c) 2023-2024 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_ciclass A<T> { 173af6ab5fSopenharmony_ci fn(t: int): int { return t; } 183af6ab5fSopenharmony_ci} 193af6ab5fSopenharmony_ci 203af6ab5fSopenharmony_ciclass B extends A<Object> { 213af6ab5fSopenharmony_ci override fn(t: int): void { } 223af6ab5fSopenharmony_ci} 233af6ab5fSopenharmony_ci 243af6ab5fSopenharmony_ci/* @@? 21:14 Error TypeError: fn(t: int): void in B cannot override fn(t: int): int in A<T> because overriding return type is not compatible with the other return type. */ 253af6ab5fSopenharmony_ci/* @@? 21:14 Error TypeError: Method fn(t: int): void in B not overriding any method */ 26