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: 2012-03-06 15:17:27

#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 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:2>
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