mcs/tests/test-async-03.cs

   1 using System.Runtime.CompilerServices;
   2 using System.Threading.Tasks;
   3
   4 static class S
   5 {
   6         public static A GetAwaiter (this int i)
   7         {
   8                 return new A ();
   9         }
  10 }
  11
  12 class A : INotifyCompletion
  13 {
  14         bool IsCompleted {
  15                 get {
  16                         return true;
  17                 }
  18         }
  19
  20         void INotifyCompletion.OnCompleted (System.Action a)
  21         {
  22         }
  23
  24         int GetResult ()
  25         {
  26                 return 3;
  27         }
  28
  29         static async Task<int> Test1 ()
  30         {
  31                 await checked (1);
  32                 return await checked (2);
  33         }
  34
  35         static async Task<int> Test2 ()
  36         {
  37                 await checked (1);
  38                 return 4;
  39         }
  40
  41         static async Task Test3 ()
  42         {
  43                 await checked (1);
  44         }
  45
  46         public static int Main ()
  47         {
  48                 var r = Test1 ();
  49                 System.Console.WriteLine (r.Result);
  50                 if (r.Result != 3)
  51                         return 1;
  52
  53                 r = Test2 ();
  54                 System.Console.WriteLine (r.Result);
  55                 if (r.Result != 4)
  56                         return 2;
  57
  58                 Test3();
  59                 return 0;
  60         }
  61 }