Re: [boost] Using multiple versions of Boost

From: Piyo (cybermax_69_at_[hidden])
Date: 2007-05-17 13:17:44

Bjørn Roald wrote:
> #include <boost_1_34_0/filesystem/path.hpp>
> 
> and should work.  It also replaces all instances of BOOST_ prefix in 
> preprocessor symbol definitions and references with BOOST_1_34_0_ and 

cool you just answered my coworker's question without seeing it :)

> 
> Other issues:
> 
>  From my very limited knowledge of boost::regexp, I did not find a way 
> to solve replacing
> 
> namespace boost
> {
> ...
> }
> 
> with
> 
> namespace boost { namespace 1_34_0
> {
> ...
> }} // end namespace boost::1_34_0

Hmmm I was thinking of the same issue. How can we build a tool to
insert the nested namespace. My coworker said that it should be
a matter of brace matching while ignoring string literals with
braces. In other words, we might be able to get away with a simpler
parser but probably much more than what regex can do.

> 
> Where searching for the ending curly braces is the challenge.  I had 
> some success experimenting with boost::expressive, but this code is far 
> from ready.  I am also a lot more concerned with parsing issues and 
> robustness as I envision many "reasonable" ways to break the matching.  
> So my suggestion is to start with the boost::regexp code which works 
> well for the simpler use-case.
> 
> If anybody want to work on the nested namespace use-case, then I am 
> happy to provide them with my code.  I do however not have time to spend 
> on this now, sorry.
> 

That's so sad :( But thanks for the prototype. It can only help :)