Re: [Boost-bugs] [Boost C++ Libraries] #6631: BOOST_PP_ITERATION_FLAGS(): error: missing binary operator before token "("

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #6631: BOOST_PP_ITERATION_FLAGS(): error: missing binary operator before token "("
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-03-07 04:15:45

#6631: BOOST_PP_ITERATION_FLAGS(): error: missing binary operator before token "("
--------------------------------+-------------------------------------------
  Reporter:  peter@…            |       Owner:  no-maintainer           
      Type:  Bugs               |      Status:  new                     
 Milestone:  To Be Determined   |   Component:  preprocessor            
   Version:  Boost 1.49.0       |    Severity:  Regression              
Resolution:                     |    Keywords:  BOOST_PP_ITERATION_FLAGS
--------------------------------+-------------------------------------------

Comment (by Blake-R <blake-r@…>):

 Yes, it helps. But me interesting why?

 Replying to [comment:2 patrick.hartling@…]:
 > Modifying `file.h` to be the following fixes the problem for me (testing
 with GCC 4.4 and Visual C++ 9.0 SP1):
 >
 > {{{
 > // file.h
 > #if !BOOST_PP_IS_ITERATING
 >
 >    #ifndef FILE_H_
 >    #define FILE_H_
 >
 >    #include <boost/preprocessor/iteration/iterate.hpp>
 >
 >    // 1st iteration:
 >    #define BOOST_PP_ITERATION_PARAMS_2 (4, (1, 10, "file.h", 0x0001))
 >    #include BOOST_PP_ITERATE()
 >
 >    // 2nd iteration:
 >    #define BOOST_PP_ITERATION_PARAMS_1 (4, (1, 10, "file.h", 0x0002))
 >    #include BOOST_PP_ITERATE()
 >
 >    #endif
 >
 > #else
 > #if BOOST_PP_ITERATION_DEPTH() == 1 \
 >    && BOOST_PP_ITERATION_FLAGS() == 0x0001 \
 >    /**/
 >
 > struct BOOST_PP_CAT(Y, BOOST_PP_ITERATION()) { };
 >
 > #elif BOOST_PP_ITERATION_DEPTH() == 1 \
 >    && BOOST_PP_ITERATION_FLAGS() == 0x0002 \
 >    /**/
 >
 > struct BOOST_PP_CAT(Z, BOOST_PP_ITERATION()) { };
 >
 > #endif
 > #endif
 > }}}
 >
 > The difference in structure is like this:
 >
 > {{{
 > #if !BOOST_PP_IS_ITERATING
 > // ...
 > #else
 > #if BOOST_PP_ITERATION_DEPTH() == 1 \
 >    && BOOST_PP_ITERATION_FLAGS() == 0x0001 \
 >    /**/
 > // ...
 > #endif
 > #endif
 > }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6631#comment:3>
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