1/* 2 * Copyright (c) 2021-2023 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 Foo<T> { 17 private constructor() { 18 } 19 20 then<U>(onFulfilled: () => U): Foo<U> { 21 let promise = new Foo<U>(); 22 let fn: () => void = (): void => { 23 let res: U = onFulfilled(); 24 promise.resolve(res); 25 } 26 return promise; 27 } 28 29 private native resolve(value: T): void; 30} 31