mcs/tests/test-786.cs

   1 using System;
   2
   3 public class A
   4 {
   5         public static int Counter;
   6         public static implicit operator string (A c)
   7         {
   8                 ++Counter;
   9                 return "A-class";
  10         }
  11
  12         public static implicit operator Delegate (A c)
  13         {
  14                 return null;
  15         }
  16 }
  17
  18 public struct B
  19 {
  20         public static int Counter;
  21         public static implicit operator string (B c)
  22         {
  23                 ++Counter;
  24                 return "B-struct";
  25         }
  26 }
  27
  28 public struct D
  29 {
  30         public static int Counter;
  31         public static implicit operator Delegate (D d)
  32         {
  33                 ++Counter;
  34                 return null;
  35         }
  36 }
  37
  38 public struct E
  39 {
  40         public static int Counter;
  41         public static implicit operator bool (E d)
  42         {
  43                 ++Counter;
  44                 return true;
  45         }
  46 }
  47
  48 class Program
  49 {
  50         public static int Main ()
  51         {
  52                 if (new B () != new B () || B.Counter != 2)
  53                         return 1;
  54
  55                 if (new B () != "B-struct" || B.Counter != 3)
  56                         return 2;
  57
  58                 if (new B () == null || B.Counter != 4) {
  59                         // FIXME: Incorrect null lifting
  60                         //return 3;
  61                 }
  62
  63                 if (new D () != new D () || D.Counter != 2)
  64                         return 10;
  65
  66                 if (new D () != null || D.Counter != 3) {
  67                         // FIXME: Incorrect null lifting
  68                         //return 11;
  69                 }
  70
  71                 if (new A () != "A-class" || A.Counter != 1)
  72                         return 20;
  73
  74                 if (new A () == null  || A.Counter != 1)
  75                         return 21;
  76
  77                 if (new E () != new E ()  || E.Counter != 2)
  78                         return 31;
  79
  80                 Console.WriteLine ("ok");
  81                 return 0;
  82         }
  83 }