[boost] Re: enabling ADL even with namespace qualification

From: David Abrahams (dave_at_[hidden])
Date: 2004-08-14 07:53:27

"Thorsten Ottosen" <nesotto_at_[hidden]> writes:

> "David Abrahams" <dave_at_[hidden]> wrote in message news:ufz6q4qlr.fsf_at_boost-consulting.com...
> | "Thorsten Ottosen" <nesotto_at_[hidden]> writes:
>
> | > are this all very complicated compared to what we want to
> | > achieve. wouldn't it be better just to stick to the using detail::XX
> | > trick and then write on the portability page that for best
> | > portability, always include new overloads before the range library.
> |
> | I don't know what you're suggesting precisely, nor what problem we're
> | trying to solve globally, so I can't answer.  Maybe if someone could
> | synthesize this all into a short description it would be easier.
>
> We want to find an easy way to enable ADL lookup with qualified
> syntax

Not possible, except through a 2-level scheme like Daniel's.  In other
words, a qualified call will never use ADL directly.  It *can* call
another function using ADL, of course.

> and to find an portable implementation of that (perhaps without a
> using declaration).

Should be no trouble, I think.  That said, I think you were on the
right track to a solution.  

Before we declare victory we should probably discuss the issue of
handling lvalue/rvalue arguments to the function that's ultimately
called.

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