mcs/tests/gtest-078.cs

   1 using System;
   2
   3 struct S : IDisposable
   4 {
   5         public static int hit;
   6
   7         void IDisposable.Dispose ()
   8         {
   9                 hit++;
  10         }
  11
  12         public void Dispose ()
  13         {
  14                 throw new ApplicationException ();
  15         }
  16 }
  17
  18 class C : IDisposable
  19 {
  20
  21         void IDisposable.Dispose ()
  22         {
  23         }
  24
  25         public void Dispose ()
  26         {
  27                 throw new ApplicationException ();
  28         }
  29 }
  30
  31 class Test
  32 {
  33         public static int Main ()
  34         {
  35                 S? nullable = null;
  36                 using (var a = nullable) {
  37                 }
  38
  39                 if (S.hit != 0)
  40                         return 1;
  41
  42                 using (var s = new S ()) {
  43                 }
  44
  45                 if (S.hit != 1)
  46                         return 2;
  47
  48                 C c = null;
  49                 GenMethod (c);
  50
  51                 using (S? a = nullable, b = nullable) {
  52                 }
  53
  54                 if (S.hit != 1)
  55                         return 3;
  56
  57                 Console.WriteLine ("ok");
  58                 return 0;
  59         }
  60
  61         static void GenMethod<T> (T t) where T : IDisposable
  62         {
  63                 using (T t2 = t) {
  64                 }
  65         }
  66 }