Boost C++ Libraries: Ticket #6631: BOOST_PP_ITERATION_FLAGS(): error: missing binary operator before token "("

cc set

Tue, 06 Mar 2012 05:20:26 GMT

cc blake-r@… added

patrick.hartling@… — Tue, 06 Mar 2012 15:17:26 GMT

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

Wed, 07 Mar 2012 04:15:45 GMT

Yes, it helps. But me interesting why?

Replying to 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

cc changed

Sun, 11 Mar 2012 03:41:16 GMT

cc smr@… added

I am currently investigating building all Debian packages with Boost 1.49 and "luabind" fails to build with very similar symptoms. Can the boost maintainer comment whether this is a bug in boost or a simple API break.

Thanks, -Steve

peter@… — Fri, 16 Mar 2012 15:02:59 GMT

This is the follow-up on the mailing list:

http://thread.gmane.org/gmane.comp.lib.boost.devel/228802

Edward Diener — Sun, 17 May 2015 03:22:01 GMT

The thread explains the issue involved as a gcc problem. Therefore I am going to close it.

status changed; resolution set

Edward Diener — Sun, 17 May 2015 03:22:11 GMT

status new → closed
resolution → fixed