mcs/tests/gtest-253.cs

   1 using System;
   2 using SCG = System.Collections.Generic;
   3
   4 public interface IExtensible<T>
   5 {
   6         void AddAll<U> (SCG.IEnumerable<U> items)
   7                 where U : T;
   8 }
   9
  10 public abstract class CollectionValueTester<R,S>
  11         where R : IExtensible<S>
  12 {
  13         protected R collection;
  14 }
  15
  16 public class ExtensibleTester<U> : CollectionValueTester<U,int>
  17         where U : IExtensible<int>
  18 {
  19         public ExtensibleTester (U u)
  20         {
  21                 this.collection = u;
  22         }
  23
  24         public void Direct()
  25         {
  26                 collection.AddAll<int> (new int[] { });
  27         }
  28 }
  29
  30 public class Extensible<V> : IExtensible<V>
  31 {
  32         public void AddAll<W> (SCG.IEnumerable<W> items)
  33                 where W : V
  34         { }
  35 }
  36
  37 class X
  38 {
  39         public static void Main ()
  40         {
  41                 Extensible<int> ext = new Extensible<int> ();
  42                 ExtensibleTester<Extensible<int>> tester = new ExtensibleTester<Extensible<int>> (ext);
  43                 tester.Direct ();
  44         }
  45 }