mcs/tests/test-pattern-12.cs

   1 using System;
   2 using System.Collections.Generic;
   3
   4 class X
   5 {
   6         public static int Main ()
   7         {
   8                 foreach (var x in Test1 ("2"))
   9                 {
  10                         Console.WriteLine (x);
  11                         return 1;
  12                 }
  13
  14                 foreach (var x in Test2 (2))
  15                 {
  16                         Console.WriteLine (x);
  17                         return 2;
  18                 }
  19
  20                 return 0;
  21         }
  22
  23         public static IEnumerable<object> Test1 (object expr)
  24         {
  25                 if (expr is short list)
  26                 {
  27                         yield return "list.Length";
  28                 }
  29         }
  30
  31         public static IEnumerable<object> Test2 (object expr)
  32         {
  33                 if (expr is string list)
  34                 {
  35                         yield return "list.Length";
  36                 }
  37         }
  38 }