mcs/tests/dtest-optional-01.cs

   1 using System;
   2 using System.Reflection;
   3 using System.Runtime.InteropServices;
   4
   5 struct S
   6 {
   7 }
   8
   9 public class G<T>
  10 {
  11
  12         public object M1 (T o = default (T))
  13         {
  14                 return o;
  15         }
  16
  17         public object M2 ([Optional] T o)
  18         {
  19                 return o;
  20         }
  21 }
  22
  23 public class C
  24 {
  25         public static object Test ([Optional] dynamic a)
  26         {
  27                 return a;
  28         }
  29
  30         void TestS (S s = default (S))
  31         {
  32         }
  33
  34         object TestD (dynamic o = null)
  35         {
  36                 return o;
  37         }
  38
  39         public static int Main ()
  40         {
  41                 if (Test () != Missing.Value)
  42                         return 1;
  43
  44                 dynamic d = new C ();
  45                 d.TestS ();
  46
  47                 if (d.TestD () != null)
  48                         return 2;
  49
  50                 d = new G<string> ();
  51                 if (d.M1 () != null)
  52                         return 3;
  53
  54                 if (d.M2 () != null)
  55                         return 4;
  56
  57                 return 0;
  58         }
  59 }