mcs/tests/test-780.cs

   1 using System;
   2
   3 namespace MonoVirtuals
   4 {
   5         class X { }
   6         class Y : X { }
   7
   8         class A
   9         {
  10                 public virtual int f (X o)
  11                 {
  12                         System.Console.WriteLine ("In A for X");
  13                         return 5;
  14                 }
  15
  16                 public virtual int f (Y o)
  17                 {
  18                         System.Console.WriteLine ("In A for Y");
  19                         return 10;
  20                 }
  21
  22                 public virtual int this[X o]
  23                 {
  24                         get
  25                         {
  26                                 System.Console.WriteLine ("In A for X");
  27                                 return 5;
  28                         }
  29                 }
  30
  31                 public virtual int this[Y o]
  32                 {
  33                         get
  34                         {
  35                                 System.Console.WriteLine ("In A for Y");
  36                                 return 10;
  37                         }
  38                 }
  39         }
  40
  41         class B : A
  42         {
  43                 public override int f (X o)
  44                 {
  45                         base.f (o);
  46                         throw new ApplicationException ("should not be called");
  47                 }
  48
  49                 public override int this[X o]
  50                 {
  51                         get
  52                         {
  53                                 base.f (o);
  54                                 throw new ApplicationException ("should not be called");
  55                         }
  56                 }
  57         }
  58
  59         class C : B
  60         {
  61                 public override int f (X o)
  62                 {
  63                         System.Console.WriteLine ("In C for X");
  64                         return base.f (o);
  65                 }
  66
  67                 public override int f (Y o)
  68                 {
  69                         System.Console.WriteLine ("In C for Y");
  70                         return base.f (o);
  71                 }
  72
  73                 public override int this[X o]
  74                 {
  75                         get
  76                         {
  77                                 System.Console.WriteLine ("In C for X");
  78                                 return base.f (o);
  79                         }
  80                 }
  81
  82                 public override int this[Y o]
  83                 {
  84                         get
  85                         {
  86                                 System.Console.WriteLine ("In C for Y");
  87                                 return base.f (o);
  88                         }
  89                 }
  90         }
  91
  92         class MainClass
  93         {
  94                 public static int Main ()
  95                 {
  96                         var o = new Y ();
  97                         var c = new C ();
  98                         if (c.f (o) != 10)
  99                                 return 1;
 100
 101                         if (c[o] != 10)
 102                                 return 2;
 103
 104                         return 0;
 105                 }
 106         }
 107 }