tests/test-115.cs

   1 //
   2 // This is a compile test, submitted by Joe.   We really need
   3 // a more thorough set of tests for the user defined explicit
   4 // conversions
   5 //
   6 using System;
   7
   8 class A {
   9         public static explicit operator X (A foo)
  10         {
  11                 X myX = new X();
  12
  13                 return myX;
  14         }
  15 }
  16
  17 class X {
  18 }
  19
  20 class Y : X {
  21 }
  22
  23 class blah {
  24         public static int Main ()
  25         {
  26                 A testA = new A();
  27
  28                 X testX = (X) testA;
  29
  30                 try {
  31                         Y testY = (Y) testA;
  32                 } catch (InvalidCastException){
  33                         return 0;
  34                 }
  35
  36                 //
  37                 // We should have thrown the exception above
  38                 //
  39                 return 1;
  40         }
  41 }
  42