[Boost-users] Re: [Foreach] Trouble iterating over Boost.MultiIndex containers

From: Eric Niebler (eric_at_[hidden])
Date: 2005-03-02 15:21:34

Eelis van der Weegen wrote:
> I'm having trouble using BOOST_FOREACH to iterate over Boost.MultiIndex 
> containers. I've attached a testcase, which fails to compile because of 
> what looks like an ADL collision between range_iterator's end() and 
> boost::mpl::end.
> 
> I'm using GCC 3.4.2 with foreach.hpp revision 1.22 from the sandbox. 
> Others have reported that GCC 4.0.0 20050130 is also affected.
> 
> (I'm aware that BOOST_FOREACH isn't part of Boost yet, but it's in the 
> review queue so I thought posting this here was appropriate.)
> 

I can reproduce the problem with gcc 3.3.3 (cygwin), but the problem 
does not reproduce with Visual C++. I'm a bit at a loss here. There is 
really no problem with BOOST_FOREACH or with its use of Boost.Range or 
with Boost.MPL that I can see. It would seem to be a compiler problem. I 
don't know why ADL is finding a class name, and I'm not sure what a 
suitable work-around should be. I'll give it some thought.

Actually, I seem to recall reading about this problem (there might even 
be a defect report already). If anybody can refresh my memory, I'd 
appreciate it.

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com