[Boost-users] [tr1::tuple] Re: [mpl] at_c type compiler error

From: David Abrahams (dave_at_[hidden])
Date: 2007-10-19 23:52:02

on Fri Oct 19 2007, Robbie Morrison <robbie-AT-actrix.co.nz> wrote:

> ------------------------------------------------------------
> Subject:     Boost-users Digest, Vol 1423, Issue 3
> Date:        Thu, 18 Oct 2007 12:00:06 -0400
> Message-ID: <mailman.11.1192723206.19439.boost-users_at_[hidden]>
> ------------------------------------------------------------
> Message:     3
> Date:        Thu, 18 Oct 2007 17:03:25 +0200
> From:        Vinzenz 'evilissimo' Feenstra <evilissimo_at_[hidden]>
> Subject:     Re: [Boost-users] [mpl] at_c type compiler error
> To:          boost-users_at_[hidden]
> Message-ID: <471775BD.3010403_at_[hidden]>
> ------------------------------------------------------------

What is all the above supposed to mean?

> Chris Weed schrieb:
>
>>>> >>>   {
>>>> >>>     return t.get<0>();
>>>> >>>   }
>
>>> >> {
>>> >>    return boost::get<0>(t);
>>> >> }

Does this really have anything to do with mpl::at_c, as the subject
implies?  It looks like it's all about tuples.  Also, is it the Boost
implementation of tr1 or some other vendor's?  If you have found a
bug, please enter a ticket by following the newticket link at
http://svn.boost.org/trac/boost.  Thanks.

> Hi all -- Just to say I encountered what looks to be
> the same problem.  Here is the note I left myself:
>
> // can later access the statistics as follows:
> //
> // std::tr1::tuple<int, double, double, double, double, double> stats;
> // stats = myTs.getStats();
> // int count;
> // count = stats.get<0>();           // member function usage (could be buggy)
> // count = std::tr1::get<0>(stats);  // free function usage
>
> Also:
>
> #include <tr1/tuple>          // n-tuples
>
> I relealize this is the TR1 version and not the
> Boost version.  Please let me know if some
> stripped down example code would be useful.
>
> My development environment for the record:
>
>   boost    : 1.34.1 (via ./configure; make all; make install)
>   gcc      : 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)
>   os       : Ubuntu 6.10, Linux 2.6.17-12-generic (7.04 is current)
>   hardware : Toshiba Tecra A2 330 laptop (purchased Aug-2004)
>
> cheers
> Robbie
> ---
> Robbie Morrison
> PhD student -- policy-oriented energy system simulation
> Institute for Energy Engineering (IET)
> Technical University of Berlin (TU-Berlin), Germany
> [from IMAP client]

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com