mcs/tests/gtest-053.cs

   1 //
   2 // Important test: Type parameters and boxing (26.7.3).
   3 //
   4 // This tests the constrained_ prefix opcode.
   5 //
   6 using System;
   7
   8 public interface ICounter
   9 {
  10         void Increment ();
  11 }
  12
  13 namespace ValueTypeCounters
  14 {
  15         public struct SimpleCounter : ICounter
  16         {
  17                 public int Value;
  18
  19                 public void Increment ()
  20                 {
  21                         Value += 2;
  22                 }
  23         }
  24
  25         public struct PrintingCounter : ICounter
  26         {
  27                 public int Value;
  28
  29                 public override string ToString ()
  30                 {
  31                         return Value.ToString ();
  32                 }
  33
  34                 public void Increment ()
  35                 {
  36                         Value += 2;
  37                 }
  38         }
  39
  40         public struct ExplicitCounter : ICounter
  41         {
  42                 public int Value;
  43
  44                 public override string ToString ()
  45                 {
  46                         return Value.ToString ();
  47                 }
  48
  49                 void ICounter.Increment ()
  50                 {
  51                         Value++;
  52                 }
  53         }
  54
  55         public struct InterfaceCounter : ICounter
  56         {
  57                 public int Value;
  58
  59                 public override string ToString ()
  60                 {
  61                         return Value.ToString ();
  62                 }
  63
  64                 void ICounter.Increment ()
  65                 {
  66                         Value++;
  67                 }
  68
  69                 public void Increment ()
  70                 {
  71                         Value += 2;
  72                 }
  73         }
  74 }
  75
  76 namespace ReferenceTypeCounters
  77 {
  78         public class SimpleCounter : ICounter
  79         {
  80                 public int Value;
  81
  82                 public void Increment ()
  83                 {
  84                         Value += 2;
  85                 }
  86         }
  87
  88         public class PrintingCounter : ICounter
  89         {
  90                 public int Value;
  91
  92                 public override string ToString ()
  93                 {
  94                         return Value.ToString ();
  95                 }
  96
  97                 public void Increment ()
  98                 {
  99                         Value += 2;
 100                 }
 101         }
 102
 103         public class ExplicitCounter : ICounter
 104         {
 105                 public int Value;
 106
 107                 public override string ToString ()
 108                 {
 109                         return Value.ToString ();
 110                 }
 111
 112                 void ICounter.Increment ()
 113                 {
 114                         Value++;
 115                 }
 116         }
 117
 118         public class InterfaceCounter : ICounter
 119         {
 120                 public int Value;
 121
 122                 public override string ToString ()
 123                 {
 124                         return Value.ToString ();
 125                 }
 126
 127                 void ICounter.Increment ()
 128                 {
 129                         Value++;
 130                 }
 131
 132                 public void Increment ()
 133                 {
 134                         Value += 2;
 135                 }
 136         }
 137 }
 138
 139 namespace Test
 140 {
 141         using V = ValueTypeCounters;
 142         using R = ReferenceTypeCounters;
 143
 144         public class Test<T>
 145                 where T : ICounter
 146         {
 147                 public static void Foo (T x)
 148                 {
 149                         Console.WriteLine (x.ToString ());
 150                         x.Increment ();
 151                         Console.WriteLine (x.ToString ());
 152                 }
 153         }
 154
 155         public class X
 156         {
 157                 public static void Main ()
 158                 {
 159                         Test<V.SimpleCounter>.Foo (new V.SimpleCounter ());
 160                         Test<V.PrintingCounter>.Foo (new V.PrintingCounter ());
 161                         Test<V.ExplicitCounter>.Foo (new V.ExplicitCounter ());
 162                         Test<V.InterfaceCounter>.Foo (new V.InterfaceCounter ());
 163                         Test<R.SimpleCounter>.Foo (new R.SimpleCounter ());
 164                         Test<R.PrintingCounter>.Foo (new R.PrintingCounter ());
 165                         Test<R.ExplicitCounter>.Foo (new R.ExplicitCounter ());
 166                         Test<R.InterfaceCounter>.Foo (new R.InterfaceCounter ());
 167                 }
 168         }
 169 }