tests/test-123.cs

   1 class X {
   2
   3         static object get_non_null ()
   4         {
   5                 return new X ();
   6         }
   7
   8         static object get_null ()
   9         {
  10                 return null;
  11         }
  12
  13         static int Main ()
  14         {
  15                 int a = 5;
  16                 object o;
  17                 decimal d = 0M;
  18
  19                 //
  20                 // compile time
  21                 //
  22                 if (!(get_non_null () is object))
  23                         return 1;
  24
  25                 if (get_null () is object)
  26                         return 2;
  27
  28                 if (!(a is object))
  29                         return 3;
  30
  31                 //
  32                 // explicit reference
  33                 //
  34                 if (null is object)
  35                         return 4;
  36
  37                 o = a;
  38                 if (!(o is int))
  39                         return 5;
  40
  41                 if (d is int)
  42                         return 6;
  43
  44                 object oi = 1;
  45                 if (!(oi is int))
  46                         return 7;
  47
  48                 System.Console.WriteLine ("Is tests pass");
  49                 return 0;
  50         }
  51 }