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[spirit] parser trees
by Aaron Griffin 30 Sep '05

30 Sep '05

Just a couple of "noob" spirit questions for you all which are more experiences in the zen ways of Spirit. If I chose to use a parser tree (or ast) instead of cluttering my code with semantic actions, is there any trade off in parse speed, besides the obvious tree generation itself? Now, let's say I generate a parse tree, and output the results to some sort of XML or structured format. Would spirit allow me to regenerate the tree from that format? i.e. Are there any issues/complications with generating the tree manually? What is more common, an AST or a parser tree? I understand the technical differences, but not the reasons behind them (yet). Thanks in advance.

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[Fwd: [pointer container] Error populating pointer container with stack based objects]
by Allen Cronce 30 Sep '05

30 Sep '05

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Newbie help please - trying to build for QNX6
by Jim Douglas 30 Sep '05

30 Sep '05

Hi, (New to Boost & bjam - not QNX) I am trying to build the Boost libs for QNX 6.3.0 on both the Windows hosted and QNX hosted development platforms using the gcc tools. What happens if I build out of the box is - Under Windows most of the libraries build, but they have Windows suffixes ".lib" and ".dll" which suggest that the build options are targeting Windows. Under QNX most of the build fails. The principal error seems to be a message "g++: unrecognised option -pthread". I have tried running './configure' but that does not make any difference. If I have interpreted the docs correctly perhaps the version 2 build system would be more appropriate for cross platform builds? Can I specify or detect the host, target and toolset independently? Any help and advice greatly appreciated... Jim Douglas

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Re: [Boost-users] MSVC v6 build fails in file boost\detail\shared _count.hpp
by David Balazic 30 Sep '05

30 Sep '05

Correction. MSVC6 builds OK without this change. My project is compiled for win (msvc6) and winCE (evc4), so the changes are, it seems, needed for the evc4 compiler. I use STLport there anyway, so this issues might be a ... non-issue :-) Regards, David > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Aaron Griffin > Sent: Thursday, September 29, 2005 10:29 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] MSVC v6 build fails in file > boost\detail\shared_count.hpp > > > On 9/29/05, David Balazic <david.balazic(a)hermes.si> wrote: > > from : > > void * get_deleter(std::type_info const & ti) const > > > > to > > void * get_deleter(type_info const & ti) const > > > > I have Visual Studio c++ 6.0. > > > > Is this a known problem ? > > Will it be pathced ? > > Well, it's been a while since I've used VS6, but if it does not > support the std:: namespace, it does not support C++. It may be the > compiler, in which case you should get a new one (mingw works well on > Windows). It might just be your STL headers, in which case, I'd > suggest replacing it with STLPort or something .... better. > > Aaron Griffin > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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[lambda] Variable assignment from lambda expression
by Alexander Borghgraef 30 Sep '05

30 Sep '05

Hi all, I have been trying out boost::lambda for the first time, and I did encounter something which I can't seem to solve. Simplified, what I'd like to do amounts to this: list<int> intlist; // fill up list someway int n; for_each( intlist.begin(), intlist.end(), n = _1 ); Obviously, this fails because it implies a cast from placeholder to int, which isn't defined. Is there some way to do this using lambda? -- Alex Borghgraef

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[iostreams] Linker error
by Klaus Nowikow 30 Sep '05

30 Sep '05

Hi, with the following test program: <code> #include <boost/iostreams/filter/bzip2.hpp> int main(int argc, char* argv[]) { return 0; } </code> I get the linker error (MSVC 7.1): LINK : fatal error LNK1104: cannot open file 'libboost_bzip2-vc71-mt-1_33.lib' A similar error occurs with "zlib.hpp" instead of "bzip2.hpp": LINK : fatal error LNK1104: cannot open file 'libboost_zlib-vc71-mt-1_33.lib' I did not find this lib files in my Boost library directory, so I might have missed something when I built Boost. This is what I did: - Got the sources for the bzip2 and the zlib libraries - Built the libs - Built Boost with this command line: bjam "-sTOOLS=vc-7_1" "-sNO_COMPRESSION=0" "-sNO_ZLIB=0" "-sZLIB_LIBPATH=c:/dev/Libraries/zlib/lib" "-sZLIB_INCLUDE=c:/dev/Libraries/zlib/include/zlib" "-sNO_BZIP2=0" "-sBZIP2_LIBPATH=c:/dev/Libraries/bzip2/lib" "-sBZIP2_INCLUDE=c:/dev/Libraries/bzip2/include/bzip2" (without the line breaks of course) The names of the bzip2 / zlib libraries are libbz2.lib and zdll.lib, resp., and the paths are correct. I did not get any error messages when building Boost, and I also did not get the "Building Boost.Iostream with .. support disabled..." message. Is there anything that I missed from the docs? Best regards, Klaus

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Which boost libraries need libs?
by Richard Kaiser 29 Sep '05

29 Sep '05

Can anybody tell me, which of the Boost libraries need libs (usually created with bjam)? As far as I can see, for most of the Boost libraries source code #includes are sufficient. For them, installation step 1 from the "Getting Started"-page is sufficient. Or do I get something wrong? Richard

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the strange warnings in using of boost::format
by Alan Huang 29 Sep '05

29 Sep '05

hi, here is the code fragment in my win32 project: namespace gtl { typedef unsigned int dword; }; void myFun( const char * _szText ){} int i = 10; myFun( boost::str( boost::format( " Page %2d" ) %i ).c_str() ); but there is so many more warinings as below: LobbyRoomListWnd.cpp d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(100) : warning C4244: '+=' : conversion from '__w64 int' to 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>::off_type', possible loss of data with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] c:\program files\microsoft visual studio .net 2003\vc7\include\xtree(267) : while compiling class-template member function 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>::pos_type boost::io::basic_altstringbuf<Ch,Tr,Alloc>::seekoff (boost::io::basic_altstringbuf<Ch,Tr,Alloc>::off_type,std::_Iosb<_Dummy>::seekdir,std::_Iosb<_Dummy>::openmode)' with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char>, _Dummy=int ] d:\working\alan_gamma\publiclibrary\boost\boost\format\format_class.hpp(136) : see reference to class template instantiation 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>' being compiled with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] d:\working\alan_gamma\richonlineclient\roclient\game\lobby\lobbyroomlistwnd.cpp(427) : see reference to class template instantiation 'boost::basic_format<Ch>' being compiled with [ Ch=char ] d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(102) : warning C4244: '+=' : conversion from '__w64 int' to 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>::off_type', possible loss of data with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(110) : warning C4244: 'argument' : conversion from '__w64 int' to 'int', possible loss of data d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(118) : warning C4244: '+=' : conversion from '__w64 int' to 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>::off_type', possible loss of data with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(120) : warning C4244: '+=' : conversion from '__w64 int' to 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>::off_type', possible loss of data with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(151) : warning C4244: 'argument' : conversion from '__w64 int' to 'int', possible loss of data c:\program files\microsoft visual studio .net 2003\vc7\include\xtree(267) : while compiling class-template member function 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>::pos_type boost::io::basic_altstringbuf<Ch,Tr,Alloc>::seekpos (boost::io::basic_altstringbuf<Ch,Tr,Alloc>::pos_type,std::_Iosb<_Dummy>::openmode)' with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char>, _Dummy=int ] d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(160) : warning C4244: 'argument' : conversion from '__w64 long' to 'int', possible loss of data d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(265) : warning C4244: 'initializing' : conversion from '__w64 int' to 'int', possible loss of data c:\program files\microsoft visual studio .net 2003\vc7\include\xtree(267) : while compiling class-template member function 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>::int_type boost::io::basic_altstringbuf<Ch,Tr,Alloc>::overflow (boost::io::basic_altstringbuf<Ch,Tr,Alloc>::int_type)' with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] d:\working\alan_gamma\publiclibrary\boost\boost\format\alt_sstream_impl.hpp(266) : warning C4244: 'initializing' : conversion from '__w64 int' to 'int', possible loss of data d:\working\alan_gamma\publiclibrary\boost\boost\format\format_implementation.hpp(193) : warning C4267: 'initializing' : conversion from 'size_t' to 'std::streamsize', possible loss of data c:\program files\microsoft visual studio .net 2003\vc7\include\ios(119) : while compiling class-template member function 'boost::basic_format<Ch>::string_type boost::basic_format<Ch>::str(void) const' with [ Ch=char ] c:\program files\microsoft visual studio .net 2003\vc7\include\xtree(267) : while compiling class-template member function 'boost::basic_format<Ch>::basic_format(const Ch *)' with [ Ch=char ] d:\working\alan_gamma\publiclibrary\boost\boost\format\format_implementation.hpp(206) : warning C4267: 'initializing' : conversion from 'size_t' to 'std::streamsize', possible loss of data d:\working\alan_gamma\publiclibrary\boost\boost\optional\optional.hpp(102) : while compiling class-template member function 'boost::basic_format<Ch>::size_type boost::basic_format<Ch>::size(void) const' with [ Ch=char ] c:\program files\microsoft visual studio .net 2003\vc7\include\ios(119) : while compiling class-template member function 'boost::basic_format<Ch> &boost::basic_format<Ch>::parse(const boost::basic_format<Ch>::string_type &)' with [ Ch=char ] d:\working\alan_gamma\publiclibrary\boost\boost\format\format_implementation.hpp(210) : warning C4267: '+=' : conversion from 'size_t' to 'std::streamsize', possible loss of data d:\working\alan_gamma\publiclibrary\boost\boost\format\format_implementation.hpp(213) : warning C4267: '+=' : conversion from 'size_t' to 'std::streamsize', possible loss of data RichOnline.cpp c:\program files\microsoft visual studio .net 2003\vc7\include\xutility(1136) : warning C4267: '=' : conversion from 'size_t' to 'std::allocator<_Ty>::value_type', possible loss of data with [ _Ty=gtl::dword ] c:\program files\microsoft visual studio .net 2003\vc7\include\vector(862) : see reference to function template instantiation 'void std::fill<std::vector<_Ty>::_Tptr,_Ty>(_FwdIt,_FwdIt,const _Ty &)' being compiled with [ _Ty=size_t, _FwdIt=std::vector<size_t>::_Tptr ] c:\program files\microsoft visual studio .net 2003\vc7\include\vector(809) : while compiling class-template member function 'void std::vector<_Ty>::_Insert_n(std::vector<_Ty>::iterator,std::vector<_Ty>::size_type,const _Ty &)' with [ _Ty=size_t ] d:\working\alan_gamma\publiclibrary\boost\boost\regex\v4\cregex.hpp(229) : see reference to class template instantiation 'std::vector<_Ty>' being compiled with [ _Ty=size_t ] c:\program files\microsoft visual studio .net 2003\vc7\include\xutility(1161) : warning C4267: '=' : conversion from 'size_t' to 'std::allocator<_Ty>::value_type', possible loss of data with [ _Ty=gtl::dword ] c:\program files\microsoft visual studio .net 2003\vc7\include\memory(237) : see reference to function template instantiation 'void std::fill_n<_Ty*,_Diff,_Tval>(_OutIt,_Diff,const _Ty &)' being compiled with [ _Ty=std::allocator<gtl::dword>::value_type, _Diff=std::vector<size_t>::size_type, _Tval=size_t, _OutIt=std::allocator<gtl::dword>::value_type * ] c:\program files\microsoft visual studio .net 2003\vc7\include\memory(257) : see reference to function template instantiation 'void std::_Uninit_fill_n<std::allocator<_Ty>::value_type,_Diff,_Tval>(_Ty *,_Diff,const _Tval &,std::allocator<_Ty> &,std::_Scalar_ptr_iterator_tag)' being compiled with [ _Ty=gtl::dword, _Diff=std::vector<size_t>::size_type, _Tval=size_t ] c:\program files\microsoft visual studio .net 2003\vc7\include\vector(878) : see reference to function template instantiation 'void std::_Uninitialized_fill_n<std::vector<_Ty>::pointer,std::vector<_Ty>::size_type,_Ty,std::_Vector_val<_Ty,_Alloc>::_Alty>(_FwdIt,_Diff,const _Tval &,_Alloc &)' being compiled with [ _Ty=size_t, _Alloc=std::allocator<gtl::dword>, _FwdIt=std::vector<size_t>::pointer, _Diff=std::vector<size_t>::size_type, _Tval=size_t ] c:\program files\microsoft visual studio .net 2003\vc7\include\vector(877) : while compiling class-template member function 'std::vector<_Ty>::pointer std::vector<_Ty>::_Ufill(std::vector<_Ty>::pointer,std::vector<_Ty>::size_type,const _Ty &)' with [ _Ty=size_t ] thanks very much for any reply. -- Yours Sincerely, Alan Huang

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[lambda]Predicate construction
by Anakreon 29 Sep '05

29 Sep '05

I tried to create a predicate based on lambda expressions. The attempt failed with compiler errors so finally I created a struct to do the job. The problem is: I have a vector with pointers of objects of class Event. vector<Event*> events and want to call find_if on the vector. The struct which does this is: struct event_locator: public unary_function<bool, Event*> { int tId; event_locator(const int tid) : tId(tid) {} const bool operator() (Event* e) { return e->hasTransaction() && e->getTransaction().getId() == tId; } }; The main problem in translating the code in the struct into lambda expressions is that I don't know how to call a method from the placeholder like:_1->hasTransaction(). I tried _1->* &Event::hasTransaction without success.

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MSVC v6 build fails in file boost\detail\shared_count.hpp
by David Balazic 29 Sep '05

29 Sep '05

Hi! I had to change line 216 in file boost\detail\shared_count.hpp from : void * get_deleter(std::type_info const & ti) const { to void * get_deleter(type_info const & ti) const { to get it built. (I am using boost in a prokejet. The build of my project fails in the above file ). I also had to make the same change in files boost\detail\sp_counted_base_w32.hpp and boost\detail\sp_counted_impl.hpp I have Visual Studio c++ 6.0. Is this a known problem ? Will it be pathced ? Regards, David --------------------------------------------------------------------- http://noepatents.eu.org/ Innovation, not litigation ! --- David Balazic mailto:david.balazic@hermes.si HERMES Softlab http://www.hermes-softlab.com Zagrebska cesta 104 Phone: +386 2 450 8851 SI-2000 Maribor Slovenija --------------------------------------------------------------------- "Be excellent to each other." - Bill S. Preston, Esq. & "Ted" Theodore Logan ---------------------------------------------------------------------

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