xref: /arkcompiler/ets_frontend/ets2panda/linter/test/definite_assignment.sts

/*
 * Copyright (c) 2023-2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

let x!: number;
initializeX();
console.log(x + x);

function initializeX() {
  x = 10;
}

let y: number;
initializeY();

console.log(y! + y!); // it's not a definite assignment assertion, it's the 'Ensure Not-Null expression', see 7.16 ArkTS spec
function initializeY() {
  y = 20;
}

class ArticleMeta {
  private wordsPerMinute!: number;
  private secondsPerImage: number;

  constructor(wordsPerMinute: number) {
      this.secondsPerImage = 15;
  }
}

class Person {
  name: string = ""
  age: number = 0
  location: string = ""
}

type OptionalPerson = Person | undefined
let persons : Record<string, OptionalPerson> = {
  "Bob": {
      name: "Bob",
      age: 48,
      location: "New York"
  }
}
console.log(persons["Bob"]!.age)