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 { 17 readonly a: boolean 18} 19 20class A implements I { 21 readonly a: boolean 22 constructor() { 23 this.a = false 24 } 25} 26 27class B extends A { 28 constructor() { 29 this./* @@ label */a = true; 30 } 31} 32 33function main() { 34 let a = new A(); 35 assertEQ(a.a, false); 36} 37 38/* @@@ label Error TypeError: Cannot assign to this property because it is readonly. */ 39