1 // Compiler options: -langversion:future
14 protected A (object x
)
18 public virtual int this [int i
] {
32 public override int this [int i
] {
34 base [i
: i
] = value + 4;
39 class XAttribute
:Attribute
41 public XAttribute (int h
)
49 static void Foo (int a
)
53 public static int Main ()
62 Console
.WriteLine ("ok");