mcs/tests/test-pattern-04.cs

   1 // Compiler options: -langversion:experimental
   2
   3 using System;
   4
   5 class RecursivePattern
   6 {
   7         static int Main ()
   8         {
   9                 object o = null;
  10                 bool b = o is C1 (8);
  11                 if (b)
  12                         return 1;
  13
  14                 o = new C1 ();
  15                 b = o is C1 (-4);
  16                 if (b)
  17                         return 2;
  18
  19                 b = o is C1 (8);
  20                 if (!b)
  21                         return 3;
  22
  23                 b = o is C1 (C1 (9), C1 (8));
  24                 if (b)
  25                         return 4;
  26
  27                 b = o is C1 (C1 (*), C1 (8));
  28                 if (!b)
  29                         return 41;
  30
  31                 b = o is C1 (0);
  32                 if (b)
  33                         return 5;
  34
  35                 ValueType vt = new S ();
  36                 b = vt is S (null, 0);
  37                 if (b)
  38                         return 6;
  39
  40                 b = vt is S (8, 0);
  41                 if (b)
  42                         return 7;
  43
  44                 b = vt is S (8, 2);
  45                 if (!b)
  46                         return 8;
  47
  48                 Console.WriteLine ("ok");
  49                 return 0;
  50         }
  51 }
  52
  53 class C1
  54 {
  55         public static bool operator is (C1 c, out int x)
  56         {
  57                 x = 8;
  58                 return true;
  59         }
  60
  61         public static bool operator is (C1 c, out C1 c2, out C1 c3)
  62         {
  63                 c2 = null;
  64                 c3 = null;
  65                 return true;
  66         }
  67 }
  68
  69 struct S
  70 {
  71         public static bool operator is (S s, out int? x, out decimal d)
  72         {
  73                 x = 8;
  74                 d = 2;
  75                 return true;
  76         }
  77 }