Re: [Boost-users] [boost::fusion v2 and xpressive] versioning conflicts...

From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2007-08-09 13:39:21

On Thu, August 9, 2007 19:09, Constantin Bryzgalin wrote:
> Hello,
>
>> I  am  using  fusion  v2 in my project and first would like to thank for the
>> great lib. I installed this lib into the boost/fusion directory.
>
>> Today  I  started  using  xpressive  lib  (which  is  also  a great one!!!).
>> Unfortunately  xpressive  broke  my  compilation, because it includes things
>> from boost/spirit/fusion and my code includes headers from boost/fusion. Now
>> my assumption: AFAIK spirit/fusion contains version 1. Since I would like to
>> use  version  2 I can not simply copy it into the spirit directory, since it
>> can  break  other  things like wave. Is it correct? If yes, does anyone have
>> suggestions on how I should deal with this issues?
>
> I'm  not using boost fusion in my projects but as a C++ programmer first thing
> I  would  try  do  is  renaming  fusion v2 namespace right after including its
> headers  and  only  then include xpressive's ones. Of course as a result using
> fusion v2 will require explicit namespace specification.
>
> --
> Constantin Bryzgalin
> http://www.oneclicktools.com
>
>

Constantin,

many thanks for you advice. This is what I already did, but I would like to have some maintanable
standard solution.

This thing goes a little bit deeper as simple namespace renaming: As I can see different versions
have different header guards (so v2 and v1 can be included in one file). May be it is good, may be
bad. It depends on the situation a programmer will trap into... ;)

But anyway thanks for your help.

With Kind Regards,

Ovanes Markarian