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using System;
struct S : IDisposable
{
public static int hit;
void IDisposable.Dispose ()
{
hit++;
}
public void Dispose ()
{
throw new ApplicationException ();
}
}
class C : IDisposable
{
void IDisposable.Dispose ()
{
}
public void Dispose ()
{
throw new ApplicationException ();
}
}
class Test
{
public static int Main ()
{
S? nullable = null;
using (var a = nullable) {
}
if (S.hit != 0)
return 1;
using (var s = new S ()) {
}
if (S.hit != 1)
return 2;
C c = null;
GenMethod (c);
using (S? a = nullable, b = nullable) {
}
if (S.hit != 1)
return 3;
Console.WriteLine ("ok");
return 0;
}
static void GenMethod<T> (T t) where T : IDisposable
{
using (T t2 = t) {
}
}
}
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