mono/tests/generic-box.2.cs

   1 using System.Collections.Generic;
   2 using UnboxTest;
   3 using BoxTest;
   4
   5 public class ClassA {}
   6
   7 public struct GenStruct<T> {
   8         T t;
   9         int field;
  10
  11         public GenStruct (T _t, int _field) {
  12                 t = _t;
  13                 field = _field;
  14         }
  15
  16         public bool isEqualTo (GenStruct<T> gs) {
  17                 EqualityComparer<T> comp = EqualityComparer<T>.Default;
  18
  19                 return comp.Equals(gs.t, t) && gs.field == field;
  20         }
  21 }
  22
  23 public class GenClass<T> {
  24         public object boxStruct (GenStruct<T> gs) {
  25                 return (object)gs;
  26         }
  27
  28         /*
  29         public object boxNullableStruct (GenStruct<T>? gs) {
  30                 return (object)gs;
  31         }
  32         */
  33 }
  34
  35 public class main {
  36         public static int Main () {
  37                 GenClass<int> gci = new GenClass<int> ();
  38                 GenStruct<int> gsi = new GenStruct<int> (123, 456);
  39
  40                 if (!gsi.isEqualTo ((GenStruct<int>)gci.boxStruct (gsi)))
  41                         return 1;
  42                 /*
  43                 if (!gsi.isEqualTo ((GenStruct<int>)gci.boxNullableStruct (gsi)))
  44                         return 1;
  45                 if (gci.boxNullableStruct (null) != null)
  46                         return 1;
  47                 */
  48
  49                 GenClass<ClassA> gca = new GenClass<ClassA> ();
  50                 GenStruct<ClassA> gsa = new GenStruct<ClassA> (new ClassA (), 789);
  51
  52                 if (!gsa.isEqualTo ((GenStruct<ClassA>)gca.boxStruct (gsa)))
  53                         return 1;
  54                 /*
  55                 if (!gsa.isEqualTo ((GenStruct<ClassA>)gca.boxNullableStruct (gsa)))
  56                         return 1;
  57                 if (gca.boxNullableStruct (null) != null)
  58                         return 1;
  59                 */
  60
  61                 UnboxerStruct<ClassA> us;
  62                 Boxer<ClassA> b = new Boxer<ClassA> ();
  63
  64                 us.field = 123;
  65
  66                 if (((UnboxerStruct<ClassA>?)b.boxNullable (us)).Value.field != 123)
  67                         return 1;
  68                 if (b.boxNullable (null) != null)
  69                         return 1;
  70
  71                 return 0;
  72         }
  73 }