220 5852 <CAGsORuCDbX4k2ZOcnoR1QwfQoain5anNrm1as5wvpe38Vg=iow@mail.gmail.com> article
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From: Zhihao Yuan <zy@miator.net>
Newsgroups: gmane.comp.lang.c++.isocpp.proposals
Subject: Re: Remove vector<bool>?
Date: Mon, 26 Aug 2013 19:57:53 -0400
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On Mon, Aug 26, 2013 at 7:22 PM, Howard Hinnant
<howard.hinnant@gmail.com> wrote:
> Question for Zhihao:
>
> Why does forward iterator's operator*() have to return a value_type& ?
>
> I'm well aware that this is what C++98/03/11 requires.  That's not what I'm asking.  I'm asking what is the benefit of this requirement in the C++1y context?  What problem does this requirement solve?

Afaics, it makes the pointed object modifiable.  And move_iterator
significantly benefits from it.  (Here is something I'm not sure:
move_iterator requires only InputIterator, while dereferencing an
InputIterator may return anything convertible to T -- is there anything
broken here?)

-- 
Zhihao Yuan, ID lichray
The best way to predict the future is to invent it.
___________________________________________________
4BSD -- http://4bsd.biz/

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