From: David Abrahams (dave_at_[hidden])
Date: 2006-05-15 08:51:00
Joel de Guzman <joel_at_[hidden]> writes:
>>> Unfortunately for Fusion iterators, I can't find a suitable workaround
>>> to enable operator-> return type deduction only when appropriate. In
>>> general, an iterator does not know if it is at the end.
>>
>> That part seems strange to me. It certainly could know whether it's
>> at the end, I think.
>
> Thinking about it some more, you may be right. Maybe I can use
> the disable_if technique. At the very least, I'll need a
> is_dereferencable<I> metafunction so I can also disable ->
> on adapted iterators.
You don't need to disable it; just pick some arbitrary type, like
void, for it to return.
-- Dave Abrahams Boost Consulting www.boost-consulting.com