1/* 2 * Copyright (c) 2022-2025 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 17export type Class1<T> = { 18 new(...args: Object[]): T; 19} 20 21export type Nullable<T> = { 22 [K in keyof T]: T[K] | null; 23}; 24 25export type Person = { 26 name: string; 27 age: number; 28 address: string; 29}; 30 31export type ReadonlyPerson = { 32 readonly [K in keyof Person]: Person[K]; 33}; 34 35export type ArrayElementMap<T extends any[], U> = { 36 [K in keyof T]: U; 37}; 38export type NumberArray = [1, 2, 3]; 39export type StringArray = ArrayElementMap<NumberArray, string>; 40export type Book = { 41 title: string; 42 author: string; 43 year: number; 44 price: number; 45}; 46export type SelectedKeys = 'title' | 'author'; 47export type PartialBook = { 48 [K in SelectedKeys]: Book[K]; 49}; 50 51export class Class2<T> { 52 a : Person; 53} 54 55export type a = Person;