mcs/tests/test-null-operator-02.cs

   1 using System;
   2
   3 class CI
   4 {
   5         public long Field;
   6         public sbyte? FieldNullable;
   7         public object FieldReference;
   8
   9         public int Prop { get; set; }
  10         public byte? PropNullable { get; set; }
  11         public object PropReference { get; set; }
  12
  13         public event Action ev1;
  14 }
  15
  16 class C
  17 {
  18         static int TestProperty ()
  19         {
  20                 CI ci = null;
  21
  22                 var m1 = ci?.Prop;
  23                 var m2 = ci?.PropNullable;
  24                 var m3 = ci?.PropReference;
  25
  26                 var m4 = ci?.Prop.ToString () ?? "N";
  27                 if (m4 != "N")
  28                         return 1;
  29
  30                 var m5 = ci?.PropNullable.ToString () ?? "N";
  31                 if (m5 != "N")
  32                         return 2;
  33
  34                 var m6 = ci?.PropReference.ToString () ?? "N";
  35                 if (m6 != "N")
  36                         return 3;
  37
  38 //        ci?.Prop = 6;
  39
  40                 ci = new CI ();
  41                 m1 = ci?.Prop;
  42                 m2 = ci?.PropNullable;
  43                 m3 = ci?.PropReference;
  44
  45 //        ci?.Prop = 5;
  46 //        if (ci.Prop != 5)
  47 //            return 1;
  48
  49 // TODO: It's not allowed for now
  50 //      ci?.Prop += 4;
  51 //      var pp1 = ci?.Prop = 4;
  52 //      var pp2 = ci?.Prop += 4;
  53
  54                 return 0;
  55         }
  56
  57         static int TestField ()
  58         {
  59                 CI ci = null;
  60                 var m1 = ci?.Field;
  61                 var m2 = ci?.FieldNullable;
  62                 var m3 = ci?.FieldReference;
  63                 var m4 = ci?.Field.ToString () ?? "N";
  64                 if (m4 != "N")
  65                         return 1;
  66
  67                 var m5 = ci?.FieldNullable.ToString () ?? "N";
  68                 if (m5 != "N")
  69                         return 2;
  70
  71                 var m6 = ci?.FieldReference.ToString () ?? "N";
  72                 if (m6 != "N")
  73                         return 3;
  74
  75 //        ci?.Field = 6;
  76
  77                 ci = new CI ();
  78                 m1 = ci?.Field;
  79                 m2 = ci?.FieldNullable;
  80                 m3 = ci?.FieldReference;
  81
  82 //        ci?.Field = 5;
  83 //        if (ci.Field != 5)
  84 //            return 1;
  85
  86 // TODO: It's not allowed for now
  87 //      ci?.Field += 4;
  88 //      var pp1 = ci?.Field = 4;
  89 //      var pp2 = ci?.Field += 4;
  90
  91                 return 0;
  92         }
  93 /*
  94         static int TestEvent ()
  95         {
  96                 CI ci = null;
  97                 ci?.ev1 += null;
  98
  99                 ci = new CI ();
 100                 ci?.ev1 += null;
 101
 102                 return 0;
 103         }
 104 */
 105         static int Main ()
 106         {
 107                 int res;
 108
 109                 res = TestProperty ();
 110                 if (res != 0)
 111                         return 10 + res;
 112
 113                 res = TestField ();
 114                 if (res != 0)
 115                         return 20 + res;
 116
 117 //              res = TestEvent ();
 118 //              if (res != 0)
 119 //                      return 30 + res;
 120
 121                 Console.WriteLine ("ok");
 122                 return 0;
 123         }
 124 }