1/* 2 * Copyright (c) 2021-2025 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 x(): boolean { 18 return true; 19 } 20} 21 22class C extends A { 23} 24 25class B extends /* @@ label */C { 26 public x: boolean; 27 public getX(): boolean { 28 return /* @@ label1 */this.x(); 29 } 30} 31 32function main(): void { 33 let instance: B = new B(); 34 assertEQ(instance.getX(), true); 35} 36 37/* @@@ label1 Error TypeError: Type 'boolean' has no call signatures. */ 38/* @@@ label Error TypeError: Cannot inherit from class C, because field x is inherited with a different declaration type */ 39