Re: [Boost-bugs] [Boost C++ Libraries] #3552: concatenation does not work with BOOST_PP_COMMA() with g++

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #3552: concatenation does not work with BOOST_PP_COMMA() with g++
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-10-30 01:01:30

#3552: concatenation does not work with BOOST_PP_COMMA() with g++
-----------------------------------+----------------------------------------
 Reporter:  mkraemer@…             |       Owner:  no-maintainer
     Type:  Support Requests       |      Status:  new          
Milestone:  Boost 1.41.0           |   Component:  preprocessor 
  Version:  Boost 1.40.0           |    Severity:  Problem      
 Keywords:                         |  
-----------------------------------+----------------------------------------

Comment(by steven_watanabe):

 I don't think that BOOST_PP_COMMA is intended to be used in this way.  The
 example given in the documentation is

 {{{
 BOOST_PP_IF(1, BOOST_PP_COMMA, BOOST_PP_EMPTY)()
 }}}

 which does not depend on the order of macro expansion.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3552#comment:1>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.