using System;
using System.Collections.Generic;

namespace TestPipelineC
{
    public delegate T Del<T>(T item);

    internal class Program
    {
        private static void Main(string[] args)
        {
            string h = "hello friends";
            string r = h.Pipe(Mangle);
            object r2 = h.Pipe(Mangle);
            int i = 17;
            int j = i.Pipe(OtherMangle);
            List<int> l = new List<int>();
            l.Add(1);
            l.Add(2);
            l.Add(3);
            List<int> l2 = l.Pipe(Mangle3);

            Console.WriteLine(r);
            Console.WriteLine(r2);
            Console.WriteLine(i);
            Console.WriteLine(j);
            foreach (var s in l2)
            {
                Console.WriteLine(s);
            }

        }


        public static string Mangle(string s)
        {
            return s.ToUpper();
        }

        public static int OtherMangle(int i)
        {
            return i*i;
        }

        public static List<int> Mangle3(List<int> l)
        {
            var l2 = new List<int>();

            foreach (var i in l)
            {
               l2.Add(i*3);
            }
            return l2;
        }

    }


    internal static class Awesome
    {
        public static T Pipe<T>(this T o, Del<T> a)
        {
            return (T) a.DynamicInvoke(o);
        }
    }
}