mcs/tests/gtest-308.cs

   1 using System;
   2
   3 public class Test {
   4         public static Comparison<U> WrapComparison<U>(Comparison<U> comparison)
   5         {
   6                 return delegate(U x, U y) { return comparison(x, y); };
   7         }
   8
   9         public delegate int MyComparison<V> (V x, V y);
  10         public static MyComparison<W> WrapMyComparison<W>(MyComparison<W> myComparison)
  11         {
  12                 return delegate(W x, W y) { return myComparison(x, y); };
  13         }
  14 }
  15
  16 public class Foo {
  17         static int compare (int x, int y)
  18         { return x - y; }
  19         static int compare (string x, string y)
  20         { return string.Compare (x, y); }
  21         static void test (int i)
  22         {
  23                 if (i != 0)
  24                         throw new Exception (""+i);
  25         }
  26         public static void Main ()
  27         {
  28                 Comparison<int> ci = Test.WrapComparison<int> (compare);
  29                 Comparison<string> cs = Test.WrapComparison<string> (compare);
  30                 Test.MyComparison<int> mci = Test.WrapMyComparison<int> (compare);
  31                 Test.MyComparison<string> mcs = Test.WrapMyComparison<string> (compare);
  32                 test (ci (1,1));
  33                 test (cs ("h", "h"));
  34                 test (mci (2,2));
  35                 test (mcs ("g", "g"));
  36         }
  37 }
  38