mcs/tests/gtest-383.cs

   1 using System;
   2
   3 struct MyTypeA
   4 {
   5         short b;
   6
   7         public MyTypeA (short b)
   8         {
   9                 this.b = b;
  10         }
  11
  12         public static MyTypeA operator + (MyTypeA a, MyTypeA b)
  13         {
  14                 throw new NotSupportedException ();
  15         }
  16
  17         public static bool operator == (MyTypeA a, MyTypeA b)
  18         {
  19                 return true;
  20         }
  21
  22         public static bool operator != (MyTypeA a, MyTypeA b)
  23         {
  24                 throw new NotSupportedException ();
  25         }
  26
  27         public static bool operator > (MyTypeA a, MyTypeA b)
  28         {
  29                 throw new NotSupportedException ();
  30         }
  31
  32         public static bool operator < (MyTypeA a, MyTypeA b)
  33         {
  34                 throw new NotSupportedException ();
  35         }
  36 }
  37
  38 struct MyTypeB
  39 {
  40         short b;
  41
  42         public MyTypeB (short b)
  43         {
  44                 this.b = b;
  45         }
  46
  47         public static MyTypeB operator + (MyTypeB a, MyTypeB b)
  48         {
  49                 return a;
  50         }
  51
  52         public static bool operator == (MyTypeB a, MyTypeB b)
  53         {
  54                 return true;
  55         }
  56
  57         public static bool operator != (MyTypeB a, MyTypeB b)
  58         {
  59                 return false;
  60         }
  61
  62         public static bool operator > (MyTypeB a, MyTypeB b)
  63         {
  64                 return false;
  65         }
  66
  67         public static bool operator < (MyTypeB a, MyTypeB b)
  68         {
  69                 return true;
  70         }
  71
  72         public static MyTypeB operator & (MyTypeB a, MyTypeB b)
  73         {
  74                 return a;
  75         }
  76 }
  77
  78 class C
  79 {
  80         public static int Main ()
  81         {
  82                 MyTypeA? mt = null;
  83                 mt = null + mt;
  84
  85                 MyTypeA? mt2 = null;
  86                 mt2 = mt2 + null;
  87                 bool b = mt2 > null;
  88                 bool x = mt2 == null;
  89
  90                 MyTypeB? bt = null;
  91                 bt = bt + bt;
  92                 if (bt != null)
  93                         return 2;
  94
  95                 MyTypeB? b2 = null;
  96                 bool bb = b2 == b2;
  97                 if (!bb)
  98                         return 3;
  99
 100                 MyTypeB? b3 = null;
 101                 b3 = b3 & b3;
 102                 return 0;
 103         }
 104 }
 105