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 16 17interface B { 18 readonly name: string 19} 20 21interface A { 22 readonly age:number 23 readonly Name: B 24} 25function main() { 26 let a:A = {age: 20, Name:{name:"John"}} 27 a.Name.name = "John2" 28} 29 30 31/* @@? 27:12 Error TypeError: Cannot assign to this property because it is readonly. */