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Boos.Bind: Binding to a placeholder address
by Adi Shavit 10 May '05

10 May '05

Hi, Say have function I want to bind that expects an int*, but my placeholder _1 is of type int. How can I tell the bind function to bind "&_1"? I guess it would be something like: bind(myFun, address_of(_1)); Is this even possible? Thanks, Adi

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Standard Library Extension TR2 Call for Proposals
by Beman Dawes 10 May '05

10 May '05

The C++ Standards Committee has begun work on a second library technical report. A Call for Proposals is available at http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1810.html --Beman

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Building Boost on MacOS 10.4 (Tiger)
by Dave Snowdon 10 May '05

10 May '05

Hello Has anyone successfully built boost on an Mac running MacOS 10.4? If so I'd appreciate some pointers on what worked for you. I've tried both boost 1.32 and a "fresh from CVS" copy with gcc 3.3 and gcc 4.0 on a Powerbook G4 with 512Mb RAM with a fresh install of MacOS 10.4. The Mac has 1.15Gb free on the startup partition and 1.36Gb free on the partition where I'm compiling boost. So far no attempt has met with success. All builds were attempted from the Terminal app with no other applications runnng. Compiling boost 1.32 with gcc 4.0 (the default compiler on MacOS 10.4) fails (unrecognised compiler version) because at the time 1.32 was released gcc 4.0 was not available. Compiling boost 1.32 with gcc 3.3 (bjam "-sTOOLS=darwin" "-sGCC=gcc-3.3" "-sGXX=gcc-3.3" stage) gives some rather strange results. Link actions seems to fail such as: ...failed darwin-Link-DyLib-action bin/boost/libs/date_time/build/libboost_date_time.dylib/darwin/debug/shared-linkable-true/libboost_date_time-d-1_32.dylib... Almost all the calls to ld gives undefined symbol errors similar to (I'm not sure if this is due to previously failed link actions): darwin-Link-DyLib-action bin/boost/libs/date_time/build/libboost_date_time.dylib/darwin/debug/shared-linkable-true/libboost_date_time-d-1_32.dylib ld: Undefined symbols: __ZNKSbIwSt11char_traitsIwESaIwEE3endEv __ZNKSbIwSt11char_traitsIwESaIwEE5beginEv __ZNKSs2atEm __ZNKSs3endEv __ZNKSs5beginEv __ZNKSs6lengthEv __ZNKSs7compareERKSs __ZNKSt11logic_error4whatEv __ZNKSt18basic_stringstreamIcSt11char_traitsIcESaIcEE3strEv __ZNKSt18basic_stringstreamIwSt11char_traitsIwESaIwEE3strEv __ZNKSt9basic_iosIcSt11char_traitsIcEE4failEv __ZNKSt9basic_iosIwSt11char_traitsIwEE4failEv __ZNKSt9type_infoeqERKS_ __ZNSaIcEC1Ev __ZNSaIcED1Ev After about 15 minutes or so the Mac grinds to a halt and starts popping up dialog boxes warning that the startup disk is full and then later that "Your Mac OS X startup disk has no more space available for application memory. To avoid problems with your computer quit any applications you may not be using" Using gcc 4.0 (bjam "-sTOOLS=darwin" stage) on the the CVS copy gives many errors similar to this: ...failed darwin-C++-action bin/boost/libs/wave/build/libboost_wave.a/darwin/release/cpp_re.o... ...skipped <@boost!libs!wave!build/libboost_wave.a/darwin/release>libboost_wave-1_33.a for lack of <@boost!libs!wave!build/libboost_wave.a/darwin/release>instantiate_cpp_exprgrammar.o... ...skipped <@boost!lib>libboost_wave-1_33.a for lack of <@boost!libs!wave!build/libboost_wave.a/darwin/release>libboost_wave-1_33.a... Previously I've been using boost 1.32 on a machine running Red Hat Linux 8 with gcc 3.2 and have not experienced any problems getting it to build. Any advice appreciated.... thanks Dave

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Need Help
by pankaj jain 10 May '05

10 May '05

Hi , I am new user of boost.python. Please help me in solving this problem. problem 1) When I am running bjam from home/boost/libs/python/example/tutorial folder its running fine but building my hello.so in home/boost/bin/boost/libs/python/example/tutorial/hello.so/gcc/.. folder.is there any way to chagne the path for hello.so problem 2): when I am running bjam from any other folder ( home/boost/sample) its giving me this error :: /home/jamrules no such directory .../.../allyourbase.jam 1451 see definition of rules "root-path: being called. Please let me know any solution. Thanks for all your help Pankaj Joaqu�n M� L�pez Mu�oz <joaquin(a)tid.es> wrote: Dave Snowdon ha escrito: > I'd like to second what Stefan said. Before I started using boost (only > a couple of months back) I'd seen references to it in many articles in > the C++ User Journal not to mention a few C++ related books. Maybe that's a significant difference wrt to the rest of the C++ community: Many programmers are not subscribed to CUJ and do not buy intermediate/advanced books (entry-level references do not usually list Boost.) I'd like a website that holds the attention of the casual comer. A newbie with just a passing knowledge of what Boost is might be scared by the contents of boost.org and never return back; a more friendly site, with forums and stuff, is a more agreeable place to hang around and eventually decide to try Boost for real. Joaqu�n M L�pez Mu�oz Telef�nica, Investigaci�n y Desarrollo > After > starting on a new C++ project I realised I needed some of the libraries > mentioned and went straight for them. So it was not so much a case of > "do I need boost?" but "where do I find the bits I need now, and how do > I use them?" > > Dave > > Stefan Strasser wrote: > > > I don't think people come by accident to the boost page(and they > > definitely don't to the community page) and need to be convinced that > > they need boost. > > they look for a specific library/class and they've been told, "boost > > has that". later on they look what also is in boost. > > at least that is how it worked for me. > > > > so a community page(especially user comments in documentation) helps a > > new user to get into it. it is imho not the function of a community > > page to raise interest. (and I think it can't). > > > > and I think the best thing you can do to bring a new user into the > > community thing is to have documentation and user comments on the same > > page(see php). because what a user definitely does is look at the > > documentation when he's found the library he's looking for. > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users --------------------------------- Yahoo! Mail Stay connected, organized, and protected. Take the tour

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order of pointer serialisation
by martin f krafft 10 May '05

10 May '05

Consider a doubly-linked list. How do you serialise this? The natural way would be to provide a serialize function such as: template <class Archive> void serialize(Archive& ar, unsigned int const) { ar & prev; ar & next; } This, however, causes "pointer conflict" exception to be thrown, because the next pointers are serialised before the actual list node is serialised. The following is an abridged scneario illustrating the same dilemma: class Foo { friend class boost::serialization::access; template <typename AT> void serialize(AT& ar, unsigned int const) {} }; int main(void) { Foo x; Foo *y = &x; boost::archive::text_oarchive oa(std::cout); oa & y; // serialise the pointer before the actual instance oa & x; // throws boost::archive::archive_exception(pointer_conflict) return 0; } I could come up with many more examples in which it is now granted that an instance has been serialised by the time that a pointer to that very instance needs to be serialised. How does boost::serialization expect this challenge to be handled? Note that I understand very well what pointer_conflict is all about. I do wonder whether this protection is always necessary. Worse yet: there seems to be no way to disable it; catching the pointer_conflict skips over the serialisation of the instance. Is the only way to deal with this to ensure that instances are always saved first? -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net micro$oft encrypts your windows nt password when stored on a windows ce device. but if you look carefully at their encryption algorithm, they simply xor the password with "susageP", Pegasus spelled backwards. Pegasus is the code name of windows ce. this is so pathetic it's staggering.

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uBLAS with MS vc 7.1
by Tux Han 10 May '05

10 May '05

I wrote a simple program using uBLAS under vc 7.1, but got so many warnings, how can I correct it? The code is: ---------------------- #include <boost/numeric/ublas/matrix.hpp> namespace ublas = boost::numeric::ublas; int main(int argc, _TCHAR* argv[]) { ublas::identity_matrix<double> A(4); ublas::identity_matrix<double> B(4); prod(A, B); return 0; } ------------------ But I got the following warning: d:\Project\Libraries\boost_1_32_0\boost\numeric\ublas\traits.hpp(941) : warning C4267: 'argument' : conversion from 'size_t' to 'const unsigned int', possible loss of data d:\Project\Libraries\boost_1_32_0\boost\numeric\ublas\matrix_expression.hpp(4462) : see reference to class template instantiation 'boost::numeric::ublas::promote_traits<X,Y>' being compiled with [ X=boost::numeric::ublas::identity_matrix<double>::size_type, Y=boost::numeric::ublas::identity_matrix<double>::size_type ] d:\test\boosttest\boosttest\boosttest.cpp(14) : see reference to class template instantiation 'boost::numeric::ublas::matrix_matrix_binary<E1,E2,F>' being compiled with [ E1=boost::numeric::ublas::identity_matrix<double>, E2=boost::numeric::ublas::identity_matrix<double>, F=boost::numeric::ublas::matrix_matrix_prod<double,double,boost::numeric::ublas::matrix_matrix_binary_traits<double,boost::numeric::ublas::identity_matrix<double>,double,boost::numeric::ublas::identity_matrix<double>>::promote_type> ] d:\Project\Libraries\boost_1_32_0\boost\numeric\ublas\traits.hpp(941) : warning C4244: 'argument' : conversion from '__w64 int' to 'const int', possible loss of data d:\Project\Libraries\boost_1_32_0\boost\numeric\ublas\matrix_expression.hpp(4463) : see reference to class template instantiation 'boost::numeric::ublas::promote_traits<X,Y>' being compiled with [ X=boost::numeric::ublas::identity_matrix<double>::difference_type, Y=boost::numeric::ublas::identity_matrix<double>::difference_type ] Linking... How to correct it? thank you very much:) __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Re: Building Boost on MacOS 10.4 (Tiger)
by Jean-François Brouillet 10 May '05

10 May '05

On 9 May 2005, at 18:08, boost-users-request(a)lists.boost.org wrote: If you don't mind modifying boost/config/compiler/gcc.hpp ... Here's how I patched it: (very last lines in the file) // last known and checked version is 4.0: #if (__GNUC__ > 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 4)) # if defined(BOOST_ASSERT_CONFIG) # error "Unknown compiler version - please run the configure tests and report the results" # else # warning "Unknown compiler version - please run the configure tests and report the results" # endif #endif BTW: Although my build half-succeeded (or half failed depending on your point of view :-) I'm more and more of the opinion that all this bjam rigmarole is strictly *not* needed! When I got fed up with the miles and miles of warnings/errors, I just decided to drop the "boost" subdir into Xcode and use it "as is". Since boost is supposed to be a 100% header file solution, the rationale for "building it" somehow eludes me ... Anyway, I'm glad to report that I'm up and running with boost 1.32 on OS X 10.4 Tiger with Xcode 2.0 (next step: do the same for CW 9.5 ... :) -- Jean-François Brouillet verec(a)mac.com

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[BGL] Iterate through neighbour vertices
by Rui Carvalho 09 May '05

09 May '05

Hi, I have a directed graph (vecS, vecS, bidirectionalS) and I'm trying to iterate through the neighbour vertices of a vertex u. When using for (tie(ai0,ai0_end) = adjacent_vertices(u,g); ai0 != ai0_end; ++ai0) the code goes only through the out vertices of u. Is there a way to iterate through all the neighbouring vertices in one loop (i.e. through both the out and in vertices of u)? Thanks, Rui

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Re: [Boost-users] Re: Boost serialization and dependency nightmares...
by kauai 09 May '05

09 May '05

Robert, Thank you. My project requires both linux and Win32 support. When I use this macro in win32 environment I get a compile time error. It generates a fairly long error which I can send you but here is the first few lines which are possibly the most important. Again it is fully compiling/linking/running in Linux. cl /nologo /W3 /MDd /Od /EHsc /RTC1 /GS /Gy /Zc:forScope /GR /Gd /TP /D_DEBUG /D WIN32 /D_CONSOLE /D_WINDOWS /DUNICODE /DQT_DLL /DQT_THREAD_SUPPORT /IW:\vob\abvsw\boost\1_32_0\win32\include\boost-1_32 /Iroot\abcmn\ /c build-win32-debug\...\xyz.cpp /Fobui ld-win32-debug\...\xyz.obj xyz.cpp W:\vob\abvsw\boost\1_32_0\win32\include\boost-1_32\boost\ serialization\split_free.hpp(55) : error C2780: 'void boost::archive::load(Archi ve &,T &)' : expects 2 arguments - 3 provided W:\vob\abvsw\boost\1_32_0\win32\include\boost-1_3 2\boost\archive\detail\iserializer.hpp(514) : see declaration of 'boost::archive ::load' W:\vob\abvsw\boost\1_32_0\win32\include\boost-1_3 2\boost\serialization\split_free.hpp(54) : while compiling class-template member function 'void boost::serialization::free_loader<Archive,T>::invoke(Archive &,T &,const unsigned int)' When I #ifdef the BOOST_CLASS_EXPORT(ClassName) macros I compile/link/and run. Of course base class serialzation is disable for Win32 at the moment because of this. Thanks for any help, -K --- Robert Ramey <ramey(a)rrsd.com> wrote: > This is addressed with the alternative BOOST_CLASS_EXPORT > method. its > described in the serialization documentation. > > Robert Ramey > > kauai wrote: > > Hi all, > > > > I have a container class that has a vector which > contains > > several other classes. My container class has a > serialize > > function that looks like this: > > > > friend class boost::serialization::access; > > template<class Archive> void serialize (Archive &ar, > const > > unsigned int version) > > { > > // save/load base class information > > ar & > BOOST_SERIALIZATION_BASE_OBJECT_NVP(MyBaseClass); > > ar.register_type(static_cast<SomeClass1*>(NULL)); > > ar.register_type(static_cast<SomeClass2*>(NULL)); > > ... > > ar & BOOST_SERIALIZATION_NVP(m_Vector); // > std::vector > > } > > > > Got everything working but now an issue has come up: > > Someone wants to add a new class but it is not part of > this > > package that is doing the serialzation. I want to > avoid > > what I call "dependency hell", is there a way for that > new > > class to get registered someplace other than in this > > function? > > > > Thanks for any help, > > Kauai > > > > > > > > > > Discover Yahoo! > > Stay in touch with email, IM, photo sharing and more. > Check it out! > > http://discover.yahoo.com/stayintouch.html > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > __________________________________ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail

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Re: [Boost-users] Re: Re: The Boost Community
by JOAQUIN LOPEZ MU?Z 09 May '05

09 May '05

----- Mensaje original ----- De: Andy Little <andy(a)servocomm.freeserve.co.uk> Fecha: Lunes, Mayo 9, 2005 8:20 pm Asunto: [Boost-users] Re: Re: The Boost Community > > "Joaquín Mª López Muñoz" <joaquin(a)tid.es> wrote > > I'd like a website that holds the attention of the casual comer. A > newbiewith just a passing knowledge of what Boost is might be > scared by > the contents of boost.org and never return back; a more friendly site, > with forums and stuff, is a more agreeable place to hang around and > eventually decide to try Boost for real. > > that has to be http://bike-shed.boost.org :-) > Well, I'm sorry this is perceived as bike shedding :( To be more specific, my wishes boil down to having a site with forums, anonymous posting to the forums and some easy way for users (not necessarily Boost authors) to upload their contributions in the form of Boost articles. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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