mcs/tests/gtest-358.cs

   1 // Tests broken equality and inequality operators
   2
   3 using System;
   4
   5 struct Foo
   6 {
   7         public static bool operator == (Foo d1, Foo d2)
   8         {
   9                 throw new ApplicationException ();
  10         }
  11
  12         public static bool operator != (Foo d1, Foo d2)
  13         {
  14                 throw new ApplicationException ();
  15         }
  16 }
  17
  18 struct S2
  19 {
  20         public static bool operator == (S2 d1, S2? d2)
  21         {
  22                 throw new ApplicationException ();
  23         }
  24
  25         public static bool operator != (S2 d1, S2? d2)
  26         {
  27                 throw new ApplicationException ();
  28         }
  29 }
  30
  31 public struct S3
  32 {
  33         public static decimal operator != (S3 a, object b)
  34         {
  35                 return -1;
  36         }
  37
  38         public static decimal operator == (S3 a, object b)
  39         {
  40                 return 1;
  41         }
  42 }
  43
  44
  45 public class Test
  46 {
  47         static Foo ctx;
  48         static S2? s2;
  49         static S3? s3;
  50
  51         public static int Main ()
  52         {
  53                 if (ctx == null)
  54                         return 1;
  55
  56                 bool b = ctx != null;
  57                 if (!b)
  58                         return 2;
  59
  60                 if (s2 != null)
  61                         return 3;
  62
  63                 s3 = new S3 ();
  64                 decimal d = s3.Value == null;
  65                 if (d != 1)
  66                         return 4;
  67
  68                 Console.WriteLine ("ok");
  69                 return 0;
  70         }
  71 }