using System;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var a = await 10;
            Console.WriteLine(a);
            Debugger.Break();
        }
    }

    static class WeirdIntExtension
    {
        public static IntAwaiter GetAwaiter(this int i) => new IntAwaiter();

        internal class IntAwaiter : INotifyCompletion
        {
            private readonly Task _timeoutTask;
            public IntAwaiter()
            {
                _timeoutTask = Task.Delay(TimeSpan.FromSeconds(15));
                Debugger.Break();
            }

            public bool IsCompleted
            {
                get
                {
                    Console.WriteLine($"Task status: {_timeoutTask.Status}");
                    return _timeoutTask.IsCompleted;
                }
            }

            public void OnCompleted(Action continuation)
            {
                Console.WriteLine("Before continuation");
                continuation();
                Console.WriteLine("After continuation");
            }

            public double GetResult() => 5.5;
        }
    }
}