Re: [boost] py_cpp and vector<..>::const_iterator

From: David Abrahams (abrahams_at_[hidden])
Date: 2000-11-30 23:16:54

Ullrich,

the cursor stuff looks good, but it leaves me wondering why your interface
provides:

    y = l.cursor()[3]
    for x in l.cursor():

but not:

    y = l[3]
    for x in l:

which would seem more natural.

----- Original Message -----
From: "Ullrich Koethe" <koethe_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Thursday, November 30, 2000 11:49 AM
Subject: Re: [boost] py_cpp and vector<..>::const_iterator

OK, I put the cursor into branch "cursor", and the build system into
branch "build_system". Both include updated documentation. Please test
these extensions and, if OK, integrate them into the main branch.

Regards
Ulli

David Abrahams wrote:
>
> Ullrich,
>
> Compilers w/o partial specialization have trouble with iterator_traits,
but
> I think the iterator_category() function always works, except for
> user-defined iterators. In STLport, iterator_category() also works for
> user-defined iterators if they are derived from std::iterator<>.
>
> Please feel free to integrate this (on a branch).
> Also, if you want to check in your build/configure system, that would be
> lovely. I think it requires an update to building.html, though.
>
> -Dave
>
> ----- Original Message -----
> From: "Ullrich Koethe" <koethe_at_[hidden]>
> To: <boost_at_[hidden]>
> Sent: Thursday, November 30, 2000 8:42 AM
> Subject: Re: [boost] py_cpp and vector<..>::const_iterator
>
> David,
>
> good idea, no problem. Do you want me to integrate this into BPL (as a
> branch at first)? If yes, I need to know how to find out the
> iterator_category in a non-conforming compiler such as MSVC.
>
> Regards
> Ulli
>
> David Abrahams wrote:
> >
> > Ullrich,
> >
> > it would be great if you could find a way to keep a reference to the
> > container alive as long as the cursor was in existence. Otherwise, the
> user
> > risks crashing from Python because of a dangling reference.
> >
> > -Dave

--
 ________________________________________________________________
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| Ullrich Koethe  Universität Hamburg / University of Hamburg    |
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