Re: [boost] [assign][range][ptr_container] using-induced problem

From: Joaquín Mª López Muñoz (joaquin_at_[hidden])
Date: 2005-06-02 01:18:21

Jonathan Wakely ha escrito:

> On Tue, May 31, 2005 at 12:32:39PM +0200, Joaqu?n M? L?pez Mu?oz wrote:
>
> >
> >
> > Jonathan Wakely ha escrito:
> >
> > > On Tue, May 31, 2005 at 08:36:41AM +0200, Joaqu?n M? L?pez Mu?oz wrote:
> > >
> > > > Martin Wille posted about this a couple of days ago
> > > > (http://lists.boost.org/boost-testing/2005/05/1216.php), but I'm afraid
> > > > it could have passed unnoticed.
> > > >
> > > > Some tests from Boost.(Assign|Range|PointerContainer) have
> > > > the following layout
> > > >
> > > > #include<...>
> > > >
> > > > using namespace std;
> > > > using namespace boost;
> > > >
> > > > ...
> > > >
> > > > #include <boost/test/unit_test.hpp>
> > > >
> > > >
> > > > having the using directives before boost/test/unit_test.hpp is AFAICS
> > > > illegal
> > > > and does indeed cause problems with GCC 3.4.x and GCC 4.x, see
> > > > for instance http://tinyurl.com/8payc
> > >
> > > That's a libstdc+ bug which has been fixed in GCC's CVS.
>
> Actually, I've just realised the fix isn't on the 3.4 branch, only 4.x
>
> > > (The problem is revealed because of the using directives before the
> > > header, which are legal, but can be dangerous)
> >
> > Yes, giving it a second thought it is probably legal...
> > Anyway, could you confirm whether moving the includes up
> > fixes the problem?
>
> I'm having serious hardware nightmares at work but I'll try to test it
> later today.
>
> If anyone else wants to investigate it requires GCC 3.4 (any version)
> and you need to compile with _GLIBCXX_DEBUG defined.
>

Did you have a chance to try? Thank you,

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo