/*
 * Copyright (c) 2024-2025 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.
 */

class Foo<T> {
    private constructor() {
    }

    then<U>(onFulfilled: () => U): Foo<U> {
        let promise = new Foo<U>();
        let fn: () => void = (): void => {
            let res: U = onFulfilled();
            promise.resolve(res);
        }
        return promise;
    }

    private native resolve(value: T): void;
}