Re: [boost] iterator_adaptor policies

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-02-01 08:07:58

Thanks, Thomas!

Note that it might be better to send diffs as enclosures. Line wrapping,
etc., tend to mess things up otherwise. I think patch may have had a hard
time with the very end of your diffs. Anyway, I applied them by hand.

Thanks again,
Dave

----- Original Message -----
From: "Thomas Witt" <witt_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Friday, February 01, 2002 3:59 AM
Subject: Re: [boost] iterator_adaptor policies

> On Friday 01 February 2002 00:03, you wrote:
> > Oh, I see. It's just that way in the documentation. Thanks for pointing
it
> > out.
> >
> > APB: I'd appreciate it lots if someone would submit a documentation
patch
> > to cover this and the issue of the accessibility of non-const versions
> > base() and policies() as discussed on the list a few days ago. I'm just
too
> > overwhelmed to do it right now.
> >
>
> I gave it a try, though the language might not meet the requirements.
>
> BTW: Did you see msg #24308?
>
> Thomas
>
> >>>> snip
>
> *** iterator_adaptors.htm Fri Feb  1 09:52:22 2002
> --- iterator_adaptors_patched.htm Fri Feb  1 09:50:26 2002
> ***************
> *** 487,495 ****
>            Requires: <tt>B</tt> is convertible to <tt>Base</tt>.
>
>         <tr>
> !         <td><tt>base_type base() const;</tt>
>            <br><br>
> !          Return a copy of the base object.
>       </table>
>
>       <h3><a name="example">Example</a></h3>
> --- 487,501 ----
>            Requires: <tt>B</tt> is convertible to <tt>Base</tt>.
>
>         <tr>
> !         <td><tt>const base_type& base() const;</tt>
>            <br><br>
> !          Return a const reference to the base object.
> !
> !       <tr>        <td><tt>base_type& base();</tt>
> !          <br><br>
> !          Return a reference to the base object. This is to give the
> policies object
> !          access to the base object. See above
for
> policies
> !          iterator_adaptor interaction.[8]
>       </table>
>
>       <h3><a name="example">Example</a></h3>
> ***************
> *** 760,766 ****
>       iterator_adaptor();
>       explicit iterator_adaptor(const Base&amp;, const Policies&amp; =
> Policies());
>
> !     base_type base() const;
>
>       template &lt;class B, class V, class R, class P&gt;
>       iterator_adaptor(
> --- 766,773 ----
>       iterator_adaptor();
>       explicit iterator_adaptor(const Base&amp;, const Policies&amp; =
> Policies());
>
> !     base_type&       base();
> !     const base_type& base() const;
>
>       template &lt;class B, class V, class R, class P&gt;
>       iterator_adaptor(
> ***************
> *** 891,896 ****
> --- 898,908 ----
>       <tt>Base</tt> type is a const pointer, then the correct defaults
>       for the <tt>reference</tt> and <tt>pointer</tt> types can not be
>       deduced. You must specify these types explicitly.
> +
> +     <p><a name="8">[8]</a>
> +     Exposing the base object might be considered as being dangerous.
> +     A possible fix would require compiler support for template friends.
> +     As this is not widely available today, the base object remains
exposed
> for now.
>
>       <hr>
>
> <<<< snip
>
> --
> Dipl.-Ing. Thomas Witt
> Institut fuer Verkehrswesen, Eisenbahnbau und -betrieb, Universitaet
Hannover
> voice: [phone] - 4273, fax: [phone]
> http://www.ive.uni-hannover.de
>
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