public static int Distance <T>(this ListIterator <T> first, ListIterator <T> last)
{
return(last.Index - first.Index);
}
public static bool NotEqual <T>(this ListIterator <T> it, ListIterator <T> other)
{
return(it.List != other.List || it.Index != other.Index);
}
public static ListIterator <T> GetAdvanced <T>(this ListIterator <T> it, int distance)
{
return(new ListIterator <T> {
List = it.List, Index = it.Index + distance
});
}
public static bool IsEqual <T>(this ListIterator <T> it, ListIterator <T> other)
{
return(it.List == other.List && it.Index == other.Index);
}
public static ListIterator <T> GetPrev <T>(this ListIterator <T> it)
{
it.Index--;
return(it);
}
public static ListIterator <T> GetNext <T>(this ListIterator <T> it)
{
it.Index++;
return(it);
}
public static void SetCurrent <T>(this ListIterator <T> it, T val)
{
it.List[it.Index] = val;
}
public static T GetCurrent <T>(this ListIterator <T> it)
{
return(it.List[it.Index]);
}