mcs/tests/test-null-operator-05.cs

   1 using System;
   2
   3 class CI
   4 {
   5         public string this [string i] { set { } get { return ""; } }
   6         public int? this [int i] { set { } get { return 1; } }
   7 }
   8
   9 class C
  10 {
  11         static int TestArrayAccess ()
  12         {
  13                 byte[] arr = null;
  14                 var v = arr? [0];
  15                 if (v != null)
  16                         return 1;
  17
  18                 long?[] ar2 = null;
  19                 var v2 = ar2? [-1];
  20                 if (v2 != null)
  21                         return 2;
  22
  23                 var v3 = arr? [0].GetHashCode () ?? 724;
  24                 if (v3 != 724)
  25                         return 3;
  26
  27                 string[] ar3 = null;
  28                 var v4 = ar3?[0].Length;
  29                 if (v4 != null)
  30                         return 4;
  31
  32 // TODO: Disabled for now?
  33 //        arr? [0] += 2;
  34                 return 0;
  35         }
  36
  37         static int TestIndexerAccess ()
  38         {
  39                 CI ci = null;
  40                 var v = ci? ["x"];
  41                 if (v != null)
  42                         return 1;
  43
  44                 var v2 = ci? [0];
  45                 if (v2 != null)
  46                         return 2;
  47
  48                 var v3 = ci? [0].GetHashCode () ?? 724;
  49                 if (v3 != 724)
  50                         return 3;
  51
  52 // TODO: Disabled for now?
  53 //       ci? [0] += 3;
  54                 return 0;
  55         }
  56
  57         static int Main ()
  58         {
  59                 int res;
  60                 res = TestArrayAccess ();
  61                 if (res != 0)
  62                         return 10 + res;
  63
  64                 res = TestIndexerAccess ();
  65                 if (res != 0)
  66                         return 20 + res;
  67
  68                 Console.WriteLine ("ok");
  69                 return 0;
  70         }
  71 }