如何在 CSharpFunctionalExtensions 中正确地将同步和异步方法链接在一起？

Question

我熟悉CSharpFunctionalExtensions。有synchronous usage 和asynchronous usage 的明显例子。但是，在某些情况下，这些需要链接在一起（同步和异步结合）。我在我的Main 方法中使用Task.FromResult 是否正确地做到了这一点？还是我应该调用不同的功能扩展方法？对于这种情况，它可以工作并且应用程序输出预期的 8，但这并不意味着这是我可以在所有软件应用程序中使用的最佳方法。

    class Program
    {
        // Assume this is a normal synchronous operation
        static Result<int> GetMyLength(string text) => Result.Ok(text.Length);

        // Assume this a typical async operation, such as a web request
        static async Task<Result<int>> DuplicateThisAsync(int x) => await Task.FromResult(Result.Ok(x * 2));

        static async Task Main()
        {
            var tryResult = await Task.FromResult(GetMyLength("Daan"))
                                .OnSuccess(a => DuplicateThisAsync(a));
            Console.WriteLine(tryResult.Value);
            Console.ReadLine();
        }
    }

Answer 1

你不需要等待同步操作

class Program
    {
        // Assume this is a normal synchronous operation
        static Result<int> GetMyLength(string text) => Result.Ok(text.Length);

        // Assume this a typical async operation, such as a web request
        static async Task<Result<int>> DuplicateThisAsync(int x) => await Task.FromResult(Result.Ok(x * 2));

        static async Task Main()
        {
            var tryResult = GetMyLength("Daan")
            if tryResult.Success // Something similar if .Success is not available
            {
               tryResult = await DuplicateThisAsync(tryResult.Value));
               Console.WriteLine(tryResult.Value);
            }
            Console.ReadLine();
        }
    }