mcs/tests/gtest-539.cs

   1 using System;
   2
   3 struct S
   4 {
   5         public int ID { get; set; }
   6 }
   7
   8 class C
   9 {
  10         public readonly int ID;
  11
  12         private C (int id)
  13         {
  14                 ID = id;
  15         }
  16
  17         public static explicit operator C (S x)
  18         {
  19                 throw new ApplicationException ("wrong conversion");
  20         }
  21
  22         public static explicit operator C (S? x)
  23         {
  24                 return new C (x.HasValue ? x.Value.ID : 5);
  25         }
  26 }
  27
  28 public class Test
  29 {
  30         public static int Main ()
  31         {
  32                 S? s = null;
  33                 C c = (C) s;
  34
  35                 if (c.ID != 5)
  36                         return 1;
  37
  38                 s = new S () { ID = 10 };
  39                 c = (C) s;
  40
  41                 if (c.ID != 10)
  42                         return 2;
  43
  44                 return 0;
  45         }
  46 }