Re: [boost] tuple - pair interoperability

From: Jaakko Jarvi (jajarvi_at_[hidden])
Date: 2004-05-05 11:56:11

On May 4, 2004, at 7:56 PM, Fredrik Blomqvist wrote:

> I think it would be convenient if one could treat std::pair as a boost
> two-tuple.
> Both tuples::tie and tuple assignment already work with std::pair but 
> I've
> noticed that the get<> accessor doesn't.
>
> So, I propose a simple extension to tuples::get<> with the obvious
> semantics:
> boost::get<0>(p) == p.first
> boost::get<1>(p) == p.second
>

The trouble with get is that pairs live in namespace std, so if pair 
get's are not
in std, they won't get found by ADL. But if we are willing to live with 
not having ADL,
adding gets for pairs would be fine.

> The only reference I found in the archives was a post by Tomas Witt 
> early
> 2002.
> "Tuple extension proposal":
> http://lists.boost.org/MailArchives/boost/msg25582.php
>
> Should I submit the code I've got or does something like this already 
> exist
> somewhere?
> (I've tested the code using VC7.1, it doesn't rely on PTS although
> member-templates)
>

Please send a patch or code.

    Jaakko