mcs/tests/gtest-iter-19.cs

   1 using System;
   2 using System.Linq;
   3 using System.Collections;
   4 using System.Collections.Generic;
   5
   6 public static class IEnumerableTransform
   7 {
   8
   9         public static IEnumerable<TOut> Transform<TOut> (this IEnumerable<int> input, EmitterFunc<TOut> rule)
  10         {
  11                 foreach (var v in input) {
  12                         TOut output;
  13                         rule (out output);
  14                         yield return output;
  15                 }
  16         }
  17
  18         public static EmitterFunc<TOut> Emit<TOut> (TOut result)
  19         {
  20                 return delegate (out TOut output) {
  21                         output = result;
  22                 };
  23         }
  24
  25         public delegate void EmitterFunc<TOut> (out TOut output);
  26
  27         public static int Main ()
  28         {
  29                 IEnumerable<int> arr = new int[3];
  30                 if (!arr.Transform<char> (IEnumerableTransform.Emit<char> ('t')).SequenceEqual(new char[] { 't', 't', 't'}))
  31                         return 1;
  32
  33                 return 0;
  34         }
  35 }