mcs/tests/test-229.cs

   1 using System;
   2 using System.Collections;
   3 using System.Collections.Specialized;
   4
   5 public class List : IEnumerable {
   6
   7         int pos = 0;
   8         int [] items;
   9
  10         public List (int i)
  11         {
  12                 items = new int [i];
  13         }
  14
  15         public void Add (int value)
  16         {
  17                 items [pos ++] = value;
  18         }
  19
  20         public MyEnumerator GetEnumerator ()
  21         {
  22                 return new MyEnumerator(this);
  23         }
  24
  25         IEnumerator IEnumerable.GetEnumerator ()
  26         {
  27                 return GetEnumerator ();
  28         }
  29
  30         public struct MyEnumerator : IEnumerator {
  31
  32                 List l;
  33                 int p;
  34
  35                 public MyEnumerator (List l)
  36                 {
  37                         this.l = l;
  38                         p = -1;
  39                 }
  40
  41                 public object Current {
  42                         get {
  43                                 return l.items [p];
  44                         }
  45                 }
  46
  47                 public bool MoveNext()
  48                 {
  49                         return ++p < l.pos;
  50                 }
  51
  52                 public void Reset()
  53                 {
  54                         p = 0;
  55                 }
  56         }
  57 }
  58
  59 public class UberList : List {
  60         public UberList (int i) : base (i)
  61         {
  62         }
  63
  64         public static int Main(string[] args)
  65         {
  66                 return One () && Two () && Three () ? 0 : 1;
  67
  68         }
  69
  70         static bool One ()
  71         {
  72                 List l = new List (1);
  73                 l.Add (1);
  74
  75                 foreach (int i in l)
  76                         if (i == 1)
  77                                 return true;
  78                 return false;
  79         }
  80
  81         static bool Two ()
  82         {
  83                 List l = new UberList (1);
  84                 l.Add (1);
  85
  86                 foreach (int i in l)
  87                         if (i == 1)
  88                                 return true;
  89                 return false;
  90         }
  91
  92         static bool Three ()
  93         {
  94                 UberList l = new UberList (1);
  95                 l.Add (1);
  96
  97                 foreach (int i in l)
  98                         if (i == 1)
  99                                 return true;
 100                 return false;
 101         }
 102 }