Re: [Boost-users] [multi-index] bug or not?

From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2007-10-30 15:30:15

Yes, this is really pitty!

I really use copy ctor in the code to construct a view. And the most
interesting thing is that it sometimes crashes sometimes not! I don't know
why.

Best Regards,
Ovanes

On 10/30/07, "JOAQUIN LOPEZ MU?Z" <joaquin_at_[hidden]> wrote:
>
> ----- Mensaje original -----
> De: Hugh Hoover <hugh_at_[hidden]>
> Fecha: Martes, Octubre 30, 2007 7:02 pm
> Asunto: Re: [Boost-users] [multi-index] bug or not?
> Para: boost-users_at_[hidden]
>
> >
> > On Oct 30, 2007, at 10:31 AM, Ovanes Markarian wrote:
> >
> > > Hello!
> [...]
> > > I have on Visual C++ 2005 an access violation, since I am trying
> > > to retrieve a view by it's hashed keys into the const container.
> >
> > Are you doing what I did yesterday, which is to keep the view as
> > an object rather than as a reference?
> >
> > Like:
> >
> > typedef multi_index_container< ... > multi_index_collection;
> > typedef multi_index_collection::nth_index<1> my_index;
> > multi_index_collection collection;
> >
> > my_index mi = collection.get<1>();
> >
> > rather than
> >
> > my_index& mi = collection.get<1>();
> >
> > ???
>
> I place my bet on this too. This misuse of B.MI interface is prevented
> against at the end of the section at http://tinyurl.com/2vlq2n ,
> although I'm afraid many readers will overlook the warning. In my
> discharge I must say that in other compilers the &-less code actually
> does not compile, for instance GCC 3.4 says:
>
> .../boost/multi_index/ordered_index.hpp:540: error:
> `boost::multi_index::
> detail::ordered_index<...>::ordered_index(
>   const boost::multi_index::detail::ordered_index<...>&)
> [with KeyFromValue = ...]' is protected
>
> Alas the code compiles in VC 8.0 because I was forced to make indices'
> copy ctors public due to a compiler bug with in-class using
> declarations
> for template functions (more details at http://tinyurl.com/354k63 ).
>
> Hope the rest of your experience with the lib has been more
> pleasant.
>
> Joaquín M López Muñoz
> Telefónica, Investigación y Desarrollo
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