mcs/tests/test-pattern-01.cs

   1 // Compiler options: -langversion:experimental
   2
   3 using System;
   4
   5 class TypePattern
   6 {
   7         public static int Main ()
   8         {
   9                 object o = 3;
  10                 bool r = o is string t1;
  11                 if (t1 != null)
  12                         return 1;
  13
  14                 if (r)
  15                         return 2;
  16
  17                 if (o is string t2)
  18                         return 3;
  19
  20                 if (t2 != null)
  21                         return 4;
  22
  23                 object o2 = (int?) 4;
  24                 bool r2 = o2 is byte? t3;
  25
  26                 if (t3 != null)
  27                         return 5;
  28
  29                 if (r2)
  30                         return 6;
  31
  32                 long? l = 5;
  33                 bool r3 = l is long t4;
  34                 if (t4 != 5)
  35                         return 7;
  36
  37                 if (!r3)
  38                         return 8;
  39
  40                 Console.WriteLine ("ok");
  41                 return 0;
  42         }
  43 }