mcs/tests/test-28.cs

   1 using System.Collections;
   2 abstract class A {
   3         protected abstract int this [int a] { get; }
   4
   5         public int EmulateIndexer (int a)
   6         {
   7                 return this [a];
   8         }
   9 }
  10
  11 class B : A {
  12         protected override int this [int a] { get { return a;}  }
  13
  14         public int M ()
  15         {
  16                 return this [0];
  17         }
  18
  19 }
  20 class X {
  21         int v1, v2;
  22
  23         int this [int a] {
  24                 get {
  25                         if (a == 0)
  26                                 return v1;
  27                         else
  28                                 return v2;
  29                 }
  30
  31                 set {
  32                         if (a == 0)
  33                                 v1 = value;
  34                         else
  35                                 v2 = value;
  36                 }
  37         }
  38
  39         public static int Main ()
  40         {
  41                 X x = new X ();
  42
  43                 x [0] = 1;
  44                 if (x.v1 != 1)
  45                         return 1;
  46
  47                 if (x [0] != 1)
  48                         return 2;
  49
  50                 B bb = new B ();
  51
  52                 if (bb.EmulateIndexer (10) != 10)
  53                         return 3;
  54
  55                 //
  56                 // This tests that we properly set the return type for the setter
  57                 // use pattern in the following indexer (see bug 36156)
  58                 Hashtable a = new Hashtable ();
  59                 int b = (int) (a [0] = 1);
  60                 if (b != 1)
  61                         return 4;
  62                 return new B ().M ();
  63         }
  64 }