public ISliceable Slice(Context context, IntegerValue fi, IntegerValue li)
{
if (fi == null)
{
fi = new IntegerValue(1L);
}
if (fi.LongValue < 0)
{
throw new IndexOutOfRangeError();
}
if (li == null)
{
li = size();
}
if (li.LongValue < 0)
{
li = new IntegerValue(size().LongValue + 1 + li.LongValue);
}
else if (li.LongValue > size().LongValue)
{
throw new IndexOutOfRangeError();
}
return(newInstance((T)Item(fi), (T)Item(li)));
}
public abstract IValue Item(IntegerValue index);
