public static MutableString /*!*/ String(this Union <MutableString, int> union)
{
Debug.Assert(!union.IsFixnum());
return(union.First);
}
public static int Fixnum(this Union <MutableString, int> union)
{
Debug.Assert(union.IsFixnum());
return(union.Second);
}
public static bool IsFixnum(this Union <MutableString, int> union)
{
return(ReferenceEquals(union.First, null));
}
public static MutableString /*!*/ String(this Union <int, MutableString> union)
{
Debug.Assert(!union.IsFixnum());
return(union.Second);
}
public static int Fixnum(this Union <int, MutableString> union)
{
Debug.Assert(union.IsFixnum());
return(union.First);
}
public static bool IsFixnum(this Union <int, MutableString> union)
{
return(ReferenceEquals(union.Second, null));
}