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Set time boost::date_time
by Lloyd 18 Oct '10

18 Oct '10

Hi, How can I set the system time using boost? I have gone through boost date_time, but could not find a method to set the time. The time is in UTC. Thanks, Lloyd ______________________________________ Scanned and protected by Email scanner

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[Test] Seeking advice for writing effective performance tests
by Bryce Lelbach 18 Oct '10

18 Oct '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 How do I write accurate, empirical and reproducible performance tests? I realize this is a very broad question, but my knowledge on this subject is lacking, so I'd appreciate a comprehensive answer (e.g. I'm not looking to benchmark a particular program/library, just looking for a strategy for designing good performance tests). I have read up on the subject, but I'm interested in what you guys (e.g. Boost users/developers) do. - -- Bryce Lelbach … [View More]

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[OT] Calling Overmind
by John Phillips 18 Oct '10

18 Oct '10

Overmind, Would you please contact either me (John Phillips) or Ron Garcia off list? Thanks. John

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boost asio: repeated reading to delimiter
by Cattus Cerebrum 17 Oct '10

17 Oct '10

A very newbie question from a beginner user of boost::asio. I have used BSD socket interface a lot in the past, and would like to start using boost::asio for my networking code. I have a server that is providing data through a network socket. The data is a continuous stream of bytes, with different data elements separated from each other by a zero byte. Would reading into a streambuf with the help of async_read_until() be a good way of handling this situation? The code I am thinking of … [View More]

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Forward declarations and iterator_facade<>
by Phil Endecott 17 Oct '10

17 Oct '10

Dear Experts, I have code something like this: struct S; class iter: public boost::iterator_facade<iter,S,......> { ... }; struct S { ... }; This used to work, but stopped recently; I believe it may have been after upgrading gcc, not after upgrading Boost itself, but I'm uncertain about that. The problem is that something inside iterator_facade calls boost::is_POD<S>, which (not unreasonably) doesn't seem to work for the forward-declared S. I've never been entirely … [View More]

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link error on serialization demo.cpp
by jiryih.tsaur＠nomura.com 16 Oct '10

16 Oct '10

Tried to compile demo.cpp and getting link error below. Any suggestions? g++ -c -I. -I/usr/include -I/usr/include/c++/4.1.2 -I/usr/include/boost -I/home/jitsaur/usr/include -g -D_DEBUG -o demo.o demo.cpp g++ -I. -I/usr/include -I/usr/include/c++/4.1.2 -I/usr/include/boost -I/home/jitsaur/usr/include -g -D_DEBUG -o demo demo.o demo.o: In function `archive_exception': /home/jitsaur/usr/include/boost/archive/archive_exception.hpp:45: undefined reference to `vtable for boost::archive::… [View More]

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[CfP] 5th Annual BoostCon, Aspen (CO, USA), May 15-20, 2011
by Hartmut Kaiser 16 Oct '10

16 Oct '10

Please distribute. ------------------ 5TH ANNUAL BOOST CONFERENCE 2011 Aspen CO, USA, May 15 - 20, 2011, www.boostcon.com CALL FOR PARTICIPATION We invite you to submit session proposals to the 5th Annual Boost Conference: BoostCon 2011 (Aspen CO, USA, May 15 - 20, 2011). Traditionally the main face-to-face event for all things Boost (www.boost.org) BoostCon 2011 will present leading speakers from the whole C++ community. >From using the Boost libraries to writing and maintaining them,… [View More] from evangelizing to deploying Boost within your organization, from infrastructure and process to vision and mission, and the new C++ Standard, BoostCon brings together the sessions, the colleagues, and the inspiration to support your work with C++ and Boost in particular for the next year. To reflect the breadth of the Boost community, the conference includes sessions aimed at three constituencies: Boost end-users, hard-core Boost library and tool developers, and academics focusing on researcher. The program fosters interaction and engagement within and across those groups, with an emphasis on hands-on, participatory sessions. SESSION TOPICS Topics of interest include, but are not restricted to, the following: * General tutorial sessions introducing one or more Boost libraries * In-depth sessions on using specific Boost libraries * Case studies on using Boost * Experts panels * Advanced sessions on implementation techniques used within Boost libraries * C++0x and how it changes life for users and library writers * Development workshops to extend or enhance existing Boost libraries * Workshops on design process * Infrastructure workshops such as Build tools, Website, Testing * Concepts and Generic Programming * Hardware and infrastructure presentations focused on how libraries can make better use of the technology * Software development tools and their application to C++ and or Boost * Other topics likely to be of great interest to Boost users and developers Interactive and collaborative sessions are encouraged, as this is the nature of both the on-line Boost community and the style of learning and participation that has proven most successful at such events. Sessions can be tutorial based, with an emphasis on interaction and participant involvement, or workshop based, whether hands-on programming or paper-based, discussion-driven collaborative work. SESSION FORMATS Presentations ------------- Presentations focus on a practitioner's ideas and experience with anything relevant to Boost and Boost users. Panels ------------- Panels feature three or four people presenting their ideas and experiences relating to Boost's relevant, controversial, emerging, or unresolved issues. Panels may be conducted in several ways, such as comparative, analytic, or historic. Tutorials ------------- Tutorials are sessions at which instructors teach conference participants specific Boost-relevant skills. Workshops ------------- Workshops provide an active arena for advancements in Boost-relevant topics. Workshops provide the opportunity for experienced practitioners to develop new ideas about a topic of common interest and experience. Author's Corner Presentations These were introduced at BoostCon 2008, and were a great success. They are short (30 minute) sessions, focusing on tips on usage and design. In addition, we're looking to uncover the hidden design gems in Boost libraries. Tool Vendors Presentations We actively encourage tool vendors and ISP's to submit proposals for a special Tool Vendors Session Track aimed at products related to Boost and C++ (compilers, libraries, tools, etc.). Other formats may also be of interest. Don't hold back a proposal just because it doesn't fit into a pigeonhole. SUBMITTING A PROPOSAL Standard Sessions are 90 minutes. You may submit a proposal for fractions or multiples of 90-minutes. Fractional proposals will be grouped into 90 minute sessions covering related topics. Longer sessions, such as tutorials and classes, will be assigned 90 minute, three hour (i.e. half day), or six hour (i.e. full day) time slots. Please include: * The working title. * Type of session: presentation, panel, tutorial, workshop, authors corner, vendor track, other. * A paragraph or two describing the topic covered, suitable for the conference web site. * Proposed length: 10-20 minute short talks, 45 minutes, 90 minutes, half day, full day. * Alternate lengths, if you are willing to make adjustments: 10-20 minute short-talks, 45 minutes, 90 minutes, half-day, full day. * Audience: users, developers, both. * Level: basic, intermediate, advanced. * A biography, suitable for the conference web site. * Your contact information (will not be made public). SUBMISSION DETAILS All submissions have to be done through the EasyChair conference management system: http://www.easychair.org/conferences/?conf=boostcon2011. If you have not already registered at EasyChair, you will need to do so in order to submit your proposal. All submissions will go through a peer review process. Authors are invited (but are not required) to submit PDF versions of full papers of up to 10 pages in ACM conference proceedings format (see http://www.acm.org/sigs/publications/proceedings-templates) The full papers are not required unless you want them published in the proceedings. All accepted proposals will be made available in the Association for Computing Machinery (ACM) Digital Library (approval pending). Best papers, after further reviews, will be considered to be book chapters or journal articles in a renowned journal. The session materials go on the BoostCon website and will be available to attendees. For general information on the BoostCon 2011 paper submission or the scope of technical papers solicited, please refer to the conference website at www.boostcon.com. For any other questions about the submission process or paper format, please contact the Program Committee at boostcon2011(a)easychair.com. If you have any technical problems with EasyChair, please contact EasyChair for help. Note: Presenters must agree to grant a non-exclusive perpetual license to publish submitted materials, either electronically or in print, in any media related to BoostCon. IMPORTANT DATES Proposal submissions due: December 10th, 2011. Proposals decisions sent (tentative program available): January 17th, 2011. Fully scheduled program available: February 7th, 2011. Session materials due: April 15th, 2011. Hartmut Kaiser, email: hartmut.kaiser(a)gmail.com (Program Committee Chair) David Abrahams, email: dave(a)boostpro.com (Conference Chair) On behalf of the conference organizers [View Less]

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[Boost.MPI] question about serializing custom object
by Cristobal Navarro 16 Oct '10

16 Oct '10

hello everybody, this is first post i have some questions after reading the Boost documentation of serialization and MPI, is it possible to serialize my custom objects with Boost.serialize and then send/receive them using plain openMPI as MPI_BYTE type?? the other question is on the tutorials i only found examples of serializing objects to archive and saving to file, but i didnt find any example where they serialize it to a binary form and send them through mpi, is there any example of this … [View More]

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[MPI, serialization] Segmentation fault in heterogeneous cluster
by Francesco Biscani 16 Oct '10

16 Oct '10

Hello, I'm getting a segfault when using Boost.MPI on a cluster of heterogeneous machines (x86_64 and ppc64). The problem arises when the "slave" machine, ppc64, receives its payload from the "master" machine, x86_64, and tries to unpack the archive. Tracing down the issue with valgrind and in debug mode, the problem arises here: ==28632== Invalid write of size 8 ==28632== at 0x10429DDC: boost::archive::detail::basic_iarchive_impl::load_pointer(boost::archive::detail::basic_iarchive&, … [View More]void*&, boost::archive::detail::basic_pointer_iserializer const*, boost::archive::detail::basic_pointer_iserializer const* (*)(boost::serialization::extended_type_info const&)) (basic_iarchive.cpp:453) ==28632== by 0x1042772F: boost::archive::detail::basic_iarchive::load_pointer(void*&, boost::archive::detail::basic_pointer_iserializer const*, boost::archive::detail::basic_pointer_iserializer const* (*)(boost::serialization::extended_type_info const&)) (basic_iarchive.cpp:564) ==28632== by 0x10468707: void boost::archive::detail::load_pointer_type<boost::mpi::packed_iarchive>::invoke<pagmo::population*>(boost::mpi::packed_iarchive&, pagmo::population*&) (iserializer.hpp:518) ==28632== by 0x104683EF: void boost::archive::load<boost::mpi::packed_iarchive, pagmo::population*>(boost::mpi::packed_iarchive&, pagmo::population*&) (iserializer.hpp:586) ==28632== by 0x10468223: void boost::archive::detail::common_iarchive<boost::mpi::packed_iarchive>::load_override<pagmo::population*>(pagmo::population*&, int) (common_iarchive.hpp:68) ==28632== by 0x10468023: void boost::archive::basic_binary_iarchive<boost::mpi::packed_iarchive>::load_override<pagmo::population*>(pagmo::population*&, int) (basic_binary_iarchive.hpp:67) ==28632== by 0x10467E27: void boost::mpi::packed_iarchive::load_override<pagmo::population*>(pagmo::population*&, int, mpl_::bool_<false>) (packed_iarchive.hpp:98) ==28632== by 0x10467C27: void boost::mpi::packed_iarchive::load_override<pagmo::population*>(pagmo::population*&, int) (packed_iarchive.hpp:115) ==28632== by 0x1046798F: boost::mpi::packed_iarchive& boost::archive::detail::interface_iarchive<boost::mpi::packed_iarchive>::operator>><pagmo::population*>(pagmo::population*&) (interface_iarchive.hpp:60) ==28632== by 0x104676BB: void boost::serialization::nvp<pagmo::population*>::load<boost::mpi::packed_iarchive>(boost::mpi::packed_iarchive&, unsigned int) (nvp.hpp:87) ==28632== by 0x104674AF: void boost::serialization::access::member_load<boost::mpi::packed_iarchive, boost::serialization::nvp<pagmo::population*> >(boost::mpi::packed_iarchive&, boost::serialization::nvp<pagmo::population*>&, unsigned int) (access.hpp:101) ==28632== by 0x104672CF: boost::serialization::detail::member_loader<boost::mpi::packed_iarchive, boost::serialization::nvp<pagmo::population*> >::invoke(boost::mpi::packed_iarchive&, boost::serialization::nvp<pagmo::population*>&, unsigned int) (split_member.hpp:54) ==28632== Address 0x4b65d98 is not stack'd, malloc'd or (recently) free'd The issue is in the method basic_iarchive_impl::load_pointer, around line 450: int i = cid; cobject_id_vector[i].bpis_ptr = bpis_ptr; Indeed, a printf confirms that i == 512 while cobject_id_vector.size() == 3. This also provokes the assertion new_cid == cid to fail one line below (where new_cid == 2). The same code, run locally on the ppc64 acting both as slave and master with mpirun -np 2, runs ok. Boost version is 1.42.0, MPI implementation is openMPI 1.4.2. Can this be related to some endianness issue? Is Boost.MPI expected to work on heterogeneous clusters? Thanks, Francesco. [View Less]

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[serialization] check_object_versioning(), STATIC_ASSERTION_FAILURE
by Витя Истомин 15 Oct '10

15 Oct '10

Please help, or point me where should i read about it. What is this versioning and why my code was compiled with boost 1.39 will get compilation errors in 1.43? Code: #include <list> #include <boost/serialization/access.hpp> #include <boost/serialization/level.hpp> #include <boost/serialization/split_member.hpp> #include <boost/serialization/tracking.hpp> #include <boost/serialization/list.hpp> #include <boost/serialization/variant.hpp> #include <… [View More]boost/serialization/version.hpp> ... typedef boost::variant <__int32, unsigned __int32, std::string, std::wstring > param_t; // note: I've tried to use boost::int32_t and others, result is the same typedef std::list< param_t > params_list_t; ... class instruction { public: ... private: friend class boost::serialization::access; /**< Make accessible private members for boost serialization */ void save (boost::archive::xml_oarchive& ar, unsigned int version) const; void load (boost::archive::xml_iarchive& ar, unsigned int version); BOOST_SERIALIZATION_SPLIT_MEMBER() private: ... params_list_t m_params; /**< List of parameters */ }; BOOST_CLASS_IMPLEMENTATION(instruction, boost::serialization::object_serializable); BOOST_CLASS_TRACKING(instruction, boost::serialization::track_never) BOOST_CLASS_IMPLEMENTATION(nvp<instruction>, boost::serialization::object_serializable) BOOST_CLASS_TRACKING(nvp<instruction>, boost::serialization::track_never) BOOST_CLASS_VERSION(instruction, 1); BOOST_CLASS_IMPLEMENTATION(param_t, boost::serialization::object_serializable); BOOST_CLASS_TRACKING(param_t, boost::serialization::track_never) BOOST_CLASS_IMPLEMENTATION(nvp<param_t>, boost::serialization::object_serializable) BOOST_CLASS_TRACKING(nvp<param_t>, boost::serialization::track_never) BOOST_CLASS_VERSION(param_t, 1) BOOST_CLASS_VERSION(params_list_t, 1) BOOST_CLASS_IMPLEMENTATION(nvp<params_list_t>, boost::serialization::object_serializable) BOOST_CLASS_TRACKING(nvp<params_list_t>, boost::serialization::track_never) BOOST_CLASS_IMPLEMENTATION(params_list_t, boost::serialization::object_serializable); BOOST_CLASS_TRACKING(params_list_t, boost::serialization::track_never) BOOST_CLASS_IMPLEMENTATION(nvp<instructions_list_t>, boost::serialization::object_serializable) BOOST_CLASS_TRACKING(nvp<instructions_list_t>, boost::serialization::track_never) BOOST_CLASS_IMPLEMENTATION(instructions_list_t, boost::serialization::object_serializable) BOOST_CLASS_TRACKING(instructions_list_t, boost::serialization::track_never) CPP file: void instruction::save (boost::archive::xml_oarchive& ar, unsigned int version) const { // ... ar << BOOST_SERIALIZATION_NVP(m_params); // error is here, all other lines commented // ... } Error (MS VS2008): 1>d:\Work\manager\third_party\boost\include\boost/archive/detail/check.hpp(78) : error C2027: use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>' 1> with 1> [ 1> x=false 1> ] 1> d:\Work\manager\third_party\boost\include\boost/archive/detail/oserializer.hpp(307) : see reference to function template instantiation 'void boost::archive::detail::check_object_versioning<T>(void)' being compiled 1> with 1> [ 1> T=const params_list_t 1> ] 1> d:\Work\manager\third_party\boost\include\boost/archive/detail/oserializer.hpp(525) : see reference to function template instantiation 'void boost::archive::detail::save_non_pointer_type<Archive>::invoke<const T>(Archive &,const T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::xml_oarchive, 1> T=const params_list_t 1> ] 1> d:\Work\manager\third_party\boost\include\boost/archive/detail/common_oarchive.hpp(69) : see reference to function template instantiation 'void boost::archive::save<Archive,T>(Archive &,T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::xml_oarchive, 1> T=const params_list_t 1> ] ... This is a first error message place: template<class T> inline void check_object_versioning(){ typedef BOOST_DEDUCED_TYPENAME mpl::or_< BOOST_DEDUCED_TYPENAME mpl::greater< serialization::implementation_level<T>, mpl::int_<serialization::object_serializable> >, BOOST_DEDUCED_TYPENAME mpl::equal_to< serialization::version<T>, mpl::int_<0> > > typex; // trap attempts to serialize with objects that don't // save class information in the archive with versioning. BOOST_STATIC_ASSERT(typex::value); } I have understanding about what is BOOST_STATIC_ASSERT, but I haven't any ideas about what I'm doing wrong. Changelog reading between 1.39 and 1.43 hasn't clarified anything. -- реклама ----------------------------------------------------------- Три новые линейки хостинг-планов - всё что нужно Вашему сайту! 6 месяцев хостинга бесплатно и домен в подарок. http://Hvosting.ua [View Less]

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[fusion] proposal BOOST_FUSION_ADAPT_FUNCTION, BOOST_FUSION_DEFINE_FUNCTION, etc
by alfC 15 Oct '10

15 Oct '10

Hi, I am using Boost.Fusion lately. Sometimes one has a function with several parameters, int f(double d , int i , std::string s){ ...bla bla ... } the logic of the program says that sometimes that same funcion will be called by generic code and in such case it is better if "f" where defined as taking a fusion::vector as argument. int f(fusion::vector<double, int, std::string>) // another function, could be an overload even since there is only one why to define this adaptor … [View More]

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[iostreams] changing char_type of bzip2_compressor
by Matthias Vallentin 15 Oct '10

15 Oct '10

I am having trouble with typedef'ing a custom bzip2_compressor that works with unsigned char instead of plain char. This is the pipeline: typedef boost::uint8_t uint8 typedef boost::iostreams::filtering_stream< boost::iostreams::input, uint8> filtering_istream; typedef boost::iostreams::filtering_stream< boost::iostreams::output, uint8> filtering_ostream; typedef boost::iostreams::basic_bzip2_compressor< std::allocator<uint8>> … [View More]bzip2_compressor; // FIXME: The bzip2_compressor as defined above does not fit in // the pipeline, what is the correct way to typedef it? std::vector<uint8> raw; auto range = boost::make_iterator_range(start, end); // args of type uint8*. filtering_istream in(range); filtering_ostream out; -> out.push(bzip2_compressor()); out.push(boost::iostreams::back_inserter(raw)); boost::iostreams::copy(in, out); The line with the arrow causes the following errors below, presumable due to an incorrect typedef of the basic_bzip2_compressor. I could not find the correct way to typedef it by crawling through the bzip2.hpp header file of the iostreams library. Any ideas? I am using g++ 4.6 with -std=gnu++0x for C++0x support. Matthias Error subset: [..] ../boost/iostreams/chain.hpp:258: error: no matching function for call to 'std::list<boost::iostreams::detail::linked_streambuf<unsigned char, std::char_traits<unsigned char> >*, std::allocator<boost::iostreams::detail::linked_streambuf<unsigned char, std::char_traits<unsigned char> >*> >::push_back(std::auto_ptr<boost::iostreams::stream_buffer<boost::iostreams::basic_bzip2_compressor<std::allocator<unsigned char> >, std::char_traits<unsigned char>, std::allocator<unsigned char>, boost::iostreams::output> >::element_type*)' [..] /opt/local/include/gcc46/c++/bits/streambuf.tcc:89: error: invalid conversion from 'std::basic_streambuf<char, std::char_traits<unsigned char> >::char_type*' to '__gnu_cxx::char_traits<unsigned char>::char_type*' [-fpermissive] /opt/local/include/gcc46/c++/bits/char_traits.h:188: error: initializing argument 1 of 'static __gnu_cxx::char_traits<_CharT>::char_type* __gnu_cxx::char_traits<_CharT>::copy(__gnu_cxx::char_traits<_CharT>::char_type*, const char_type*, std::size_t) [with _CharT = unsigned char, __gnu_cxx::char_traits<_CharT>::char_type = unsigned char, std::size_t = long unsigned int]' [-fpermissive] /opt/local/include/gcc46/c++/bits/streambuf.tcc:89: error: invalid conversion from 'const char_type*' to 'const char_type*' [-fpermissive] /opt/local/include/gcc46/c++/bits/char_traits.h:188: error: initializing argument 2 of 'static __gnu_cxx::char_traits<_CharT>::char_type* __gnu_cxx::char_traits<_CharT>::copy(__gnu_cxx::char_traits<_CharT>::char_type*, const char_type*, std::size_t) [with _CharT = unsigned char, __gnu_cxx::char_traits<_CharT>::char_type = unsigned char, std::size_t = long unsigned int]' [-fpermissive] /opt/local/include/gcc46/c++/bits/streambuf.tcc: In member function 'std::streamsize std::basic_streambuf<_CharT, _Traits>::xsgetn(std::basic_streambuf<_CharT, _Traits>::char_type*, std::streamsize) [with _CharT = char, _Traits = std::char_traits<unsigned char>, std::streamsize = long int, std::basic_streambuf<_CharT, _Traits>::char_type = char]': [..] .._client.cc:170: instantiated from here /opt/local/include/gcc46/c++/bits/streambuf.tcc:55: error: invalid conversion from 'std::basic_streambuf<char, std::char_traits<unsigned char> >::char_type*' to '__gnu_cxx::char_traits<unsigned char>::char_type*' [-fpermissive] /opt/local/include/gcc46/c++/bits/char_traits.h:188: error: initializing argument 1 of 'static __gnu_cxx::char_traits<_CharT>::char_type* __gnu_cxx::char_traits<_CharT>::copy(__gnu_cxx::char_traits<_CharT>::char_type*, const char_type*, std::size_t) [with _CharT = unsigned char, __gnu_cxx::char_traits<_CharT>::char_type = unsigned char, std::size_t = long unsigned int]' [-fpermissive] /opt/local/include/gcc46/c++/bits/streambuf.tcc:55: error: invalid conversion from 'std::basic_streambuf<char, std::char_traits<unsigned char> >::char_type*' to 'const char_type*' [-fpermissive] /opt/local/include/gcc46/c++/bits/char_traits.h:188: error: initializing argument 2 of 'static __gnu_cxx::char_traits<_CharT>::char_type* __gnu_cxx::char_traits<_CharT>::copy(__gnu_cxx::char_traits<_CharT>::char_type*, const char_type*, std::size_t) [with _CharT = unsigned char, __gnu_cxx::char_traits<_CharT>::char_type = unsigned char, std::size_t = long unsigned int]' [-fpermissive] [View Less]

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math: combinations of i amongst n elements
by Hicham Mouline 15 Oct '10

15 Oct '10

Hi, Is there an available function to generate all the i-tuples among a sequence of size n (runtime) and 1<= i <=n For e.g. in a vector of 3 ints 1 2 and 3 we want to get all of the singletons: 1 2 3 all the pairs 1 2 1 3 2 3 and all the triplets 1 2 3 If not and I were to write one (n known at runtime only), what signature should I use? template <typename iterator> .... combinations(iterator begin, iterator end) { } what return type would hold all of the singletons, … [View More]

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Determine 32 vs 64 architecture
by Ryan McConnehey 15 Oct '10

15 Oct '10

Is there a library that lets me determine on what architecture my code is compiled? I needed to redefine a couple of typedef for fundamental types. Ryan

3 2

build failed for mpi on homogeneous platform
by Alain Miniussi 14 Oct '10

14 Oct '10

Hi, I am trying to build 1.44 on linux systems and the MPI component fails when I uncomment the #define BOOST_MPI_HOMOGENEOUS line in boost/mpi/config.hpp It is failing with both intel 11 and g++ compilers, here is the first error message for gcc 4.4.3: gcc.compile.c++ bin.v2/libs/mpi/build/gcc-4.4.3/release/threading-multi/broadcast.o In file included from ./boost/mpi/packed_iarchive.hpp:26, from ./boost/mpi/communicator.hpp:27, from ./boost/mpi/… [View More]collectives.hpp:21, from ./boost/mpi/collectives_fwd.hpp:19, from ./boost/mpi/collectives/broadcast.hpp:11, from libs/mpi/src/broadcast.cpp:9: ./boost/mpi/detail/binary_buffer_iprimitive.hpp: In member function ‘void boost::mpi::binary_buffer_iprimitive::load(T&) [with T = boost::archive::version_type]’: ./boost/archive/detail/iserializer.hpp:107: instantiated from ‘static void boost::archive::load_access::load_primitive(Archive&, T&) [with Archive = boost::mpi::packed_iarchive, T = boost::archive::version_type]’ ./boost/archive/detail/iserializer.hpp:356: instantiated from ‘static void boost::archive::detail::load_non_pointer_type<Archive>::load_primitive::invoke(Archive&, T&) [with T = boost::archive::version_type, Archive = boost::mpi::packed_iarchive]’ ./boost/archive/detail/iserializer.hpp:433: instantiated from ‘static void boost::archive::detail::load_non_pointer_type<Archive>::invoke(Archive&, T&) [with T = boost::archive::version_type, Archive = boost::mpi::packed_iarchive]’ ./boost/archive/detail/iserializer.hpp:586: instantiated from ‘void boost::archive::load(Archive&, T&) [with Archive = boost::mpi::packed_iarchive, T = boost::archive::version_type]’ ./boost/archive/detail/common_iarchive.hpp:66: instantiated from ‘void boost::archive::detail::common_iarchive<Archive>::load_override(T&, int) [with T = boost::archive::version_type, Archive = boost::mpi::packed_iarchive]’ ./boost/mpi/packed_iarchive.hpp:101: instantiated from ‘void boost::mpi::packed_iarchive::load_override(T&, int, mpl_::false_) [with T = boost::archive::version_type]’ ./boost/mpi/packed_iarchive.hpp:118: instantiated from ‘void boost::mpi::packed_iarchive::load_override(T&, int) [with T = boost::archive::version_type]’ ./boost/archive/detail/interface_iarchive.hpp:60: instantiated from ‘Archive& boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) [with T = boost::archive::version_type, Archive = boost::mpi::packed_iarchive]’ ./boost/archive/detail/common_iarchive.hpp:45: instantiated from ‘void boost::archive::detail::common_iarchive<Archive>::vload(boost::archive::version_type&) [with Archive = boost::mpi::packed_iarchive]’ libs/mpi/src/broadcast.cpp:151: instantiated from here ./boost/mpi/detail/binary_buffer_iprimitive.hpp:87: error: no matching function for call to ‘assertion_failed(mpl_::failed************ boost::serialization::is_bitwise_serializable<boost::archive::version_type>::************)’ ./boost/mpi/detail/binary_buffer_iprimitive.hpp: In member function ‘void boost::mpi::binary_buffer_iprimitive::load(T&) [with T = boost::archive::object_id_type]’: Regards, -- Alain Miniussi ---- mail: alain.miniussi(a)oca.eu SIT https://sitweb.oca.eu tel: +33 4 92 00 30 09 CRIMSON https://crimson.oca.eu web: http://www.oca.eu/alainm [View Less]

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[Pool] Problems using Boost.Pool with the Eigen matrix library
by lfrfly＠icqmail.com 14 Oct '10

14 Oct '10

Since Eigen matrices and vectors use SSE and therefore require a particular alignment, Eigen requires that when these types (specifically, the compile-time sized versions) are within a struct or class, that struct be given the EIGEN_MAKE_ALIGNED_OPERATOR_NEW macro. But here's the problem. What if that struct is allocated by a boost::pool_allocator<T>? Is there any way to enforce alignment then? I'm trying it and it just isn't working. I keep getting breakpoints hit inside of Eigen … [View More]

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bzip2_compressor help
by Bryan S 14 Oct '10

14 Oct '10

I know that I'm doing something stupid but it isn't obvious to me what. I'm trying to write a compressed file using: namespace BI = boost::iostreams; BI::filtering_ostream out; std::fstream mfile("test.gz", std::ios::binary|std::ios::out); out.push(BI::bzip2_compressor()); out.push(mfile); out << "This is a gz file" << endl; but when I do so, the file is always empty. Commenting out the push of the … [View More]

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Re: [Boost-users] [Boost.Spirit] Synthesised attributes and sub-rules
by Hartmut Kaiser 14 Oct '10

14 Oct '10

> On 14 October 2010 22:36, Hartmut Kaiser <hartmut.kaiser(a)gmail.com> wrote: > > That should be easy, see below. > > > > start = a_rule | b_rule | c_rule; > > > > qi::rule<Iterator, std::vector<int>()> a_rule; > > qi::rule<Iterator, std::vector<int>()> b_rule; > > qi::rule<Iterator, std::vector<int>()> c_rule; > > > I think I tried something like that, but it didn't work. Unless I'm … [View More]

1 0

where is lexical_cast.hpp?
by alapex0310＠gmail.com 14 Oct '10

14 Oct '10

Hi, I want to use boost::lexical_cast but cannot find lexical_cast.hpp in the boost tree. I am using VS2008. Has it been moved somewhere? I am trying to use boost 1.44. Thanks a lot in advance, -Al

3 3

[fusion] memory layout of fusion::vector vs boost::tuple/boost::array
by alfC 14 Oct '10

14 Oct '10

Hi, I am trying to convert a boost::array into a fusion::vector. reinterpreting the memory from boost::array. It works for tuples but not fusion::vector, why is that. Is there a way to make it work? ( I was hoping that the memory layout is the same to make conversion from one to the other very easy.) #include <boost/fusion/container.hpp> #include <boost/fusion/include/container.hpp> #include<boost/array.hpp> #include<iostream> #include<boost/tuple/tuple.hpp> … [View More]

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Re: [Boost-users] [serialization] Deserialize by pointer withoutcalling new/constructor
by averigin 14 Oct '10

14 Oct '10

> It's not the most common scenario. It can be addressed, but requires > some more complete understanding of the library. The library "just works" > for the common cases. > > Think about why you have a base class pointer in your class which will > "never change". That is, if you recover it with out re-creating it, > you're > assuming that in the meantime the following statement has not been > executed. > > my_base_ptr = some_derived_ptr; > > That is, … [View More]you're writing code on an assumption which you can't enforce. > If someday, in some other code module, far, far, away .. someone > executes the above, you'll have some unrecoverable mess to deal with > with no clear idea of what the source of the problem is. > > Sooo - my suggestion is to replace > > struct my_thing { > Base *m_ptr > ... > }; > > with > > struct my_thing > Base &m_b > ... > }; > > This will "just work" as far as serialization is concerned. > > Now if making the above change in your program is hard to do, you should > think about it a little bit more before you insert a booby trap into your > program. > Usually, this will entail some refactoring to get things back together > again. > But the result will be something more robust, less likely to contain bugs, > easier to test and aintain. Here's an attempt to further explain and (hopefully) clarify what's happening and why. 4 pieces of background to start, then I'll try to tie it all together. 1. In OMNeT, there are two main components to a simulation: Simple Modules, which have associated functionality (i.e., code), and Compound Modules, which are containers for simple modules and have no associated code. Note, for reference, the module types are termed cSimpleModule and cCompoundModule, both derived from cModule. All simple modules are derived from cSimpleModule and all compound modules are derived from cCompoundModule. 2. In a simulation it's possible to lookup another module (M_i) from the active module (M_a) and invoke methods on M_i. The lookup functions return a cModule pointer to M_i, which then must be dynamically cast to M_i's most-derived type to invoke its methods. However, that cast requires including M_i's header file in the code for M_a, which can result in ugly dependency trees. Thus, serializing by a looked-up cModule (base-class) pointer keeps things 'nice'. 3. When dynamically generating modules, they are created using a module factory which configures some internal state information which is not publicly accessible. Also, note that the factory method returns a cModule pointer. 4. When I run simulations, serialization and deserialization never occur during the same simulation; either the simulation starts fully configured and eventually serializes its state immediately before terminating, or it starts with a minimal skeleton and constructs the rest of the modules based upon a previously stored state. Now to put all the pieces together. When saving a simulation state, it's necessary to serialize a number of compound modules. So far, I've done this by adding a simple "archiver" module to them. I lookup the "archiver" module using the lookup functions and try to serialize the resulting cModule pointer. This causes the "archiver" module to save what information is publicly accessible (i.e., there is some internal state information it cannot access). When loading a saved state, the minimal skeleton includes one of the above mentioned "archiver" modules. It creates the input archive and then tries to create the other modules in the simulation. This is where I run into problems. What I wanted to do was have the "archiver" module create the other modules using their associated factories and then deserialize the rest of their state via the cModule pointers returned by the factories. This way the factory configures the module's private internal state information and the everything else is loaded from the archive, and this minimizes file dependencies (i.e., including header files for derived types). (I realize this isn't true (de)serialization, so I refer to it as partial-serialization.) However, this conflicts with the normal method for pointer deserialization, which would allocate memory for a new module, initialize it and then deserialize the information from the archive into that new object, which (in my case) is then promptly deleted or leaked. The only alternative I can see would be to dynamically cast the cModule pointers and directly call their serialize() or save()/load() methods directly. However, this seems like an ugly hack since that requires making the serialization methods public and including derived-class headers all over the place. Thus, I would like to stick with my partial-serialization method. I'm just not sure if it's possible to "easily" implement what I need for the loading portion. > > Of course if you're working in an environment whose controlling principle > is "just make it work right now", you're out of luck. You'll just have to > bury the bomb in your program and hope you're not in the immediate > vicinity when it blows up. > While I don't quite see it as a bomb, I know that probably just indicates short-sightedness on my part. Regardless, I am in the "just make it work right now" boat, so any help you can offer would be much appreciated. Regards, Adam Verigin P.S.: I did manage a temporary hack of archive/detail/iserializer.hpp pointer_iserializer::load_object_ptr() that (badly) assumed that if the passed pointer is not NULL, then it is a pointer to an allocated object so there's no need to create a new object. Coupled with a do-nothing load_construct_data() method this worked great for partial-deserialization, but causes memory corruption for normal deserialization since the assumption is not always true (nor is it a good assumption to try an force on other users). [View Less]

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[Smart Ptr] Why is weak_ptr a _ptr?
by Szymon Gatner 13 Oct '10

13 Oct '10

Hi, Is it just me or is it really the worse naming in whole boost library? It is nothing like any other smart pointer. No initialization / construction from raw pointer. No operator * or -> (the very least one would expect from _ptr class). No get(). And many more which I now forgot. My point is that is is not a pointer at all, not even a bit. It only happens to have a member variable returning one and that is hardly a reason to call type pointer-like. It should rather be called … [View More]

6 6

Proto domains shenanigans
by joel falcou 13 Oct '10

13 Oct '10

OK, I have a situation in which proto domain/subdomain could help me but i can't wrap my head around a proper solution. Here is the deal, i have various sub EDSL that goes like: - constants EDSL provides named consatnts (like zero_, one_, pi_ etc) that are meant to be terminal usable in any other EDSL en provide a type based way to know which constant is beging used and provide optimization in came it helps (e.g detecting x < zero_ in SIMD EDSL to replace with the SSSE3 corresponding … [View More]

2 3

[asio] DNS query
by for-gmane 13 Oct '10

13 Oct '10

Hi, is it possible to do DNS queries with asio? (for example getting the MX record(s) of a domain)

4 3

[units] quantities with system abstraction "any<length>"
by alfC 13 Oct '10

13 Oct '10

Hi, In order to avoid reinventing the wheel I was wondering if there is any effort or there was any attempt to further abstract boost::units::quantities from its unit system but with a given dimension. That is, an object that can hold any boost::units::quantity<unit<Dimension, System> > with a given Dimension fir any System. For example (names are not ideal) any<length_dimension> a1 = 2.*si::meter; // RHS is type quantity<si::length> any<length_dimension> a2 =… [View More]

2 1

Boost serialization through base class
by Joe Drumm 13 Oct '10

13 Oct '10

Hi, I've tried using the most basic example I can find in the documentation to serialize a class using a pointer to a polymorphic base. However, it only serializes the base class. I'm currently on 1.34.1. Am I missing something obvious? Sample code below: class base { public: friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int) { } }; class derived : public base { public: … [View More]

2 1

[String algo] Breaking change between 1.41 and 1.44 in split
by Christophe Henry 13 Oct '10

13 Oct '10

Hi, I noticed a breaking change in the split function when the input string is empty. Consider the following example: #include <string> #include <vector> #include <iostream> #include <boost/algorithm/string/split.hpp> #include <boost/algorithm/string/classification.hpp> int main() { std::vector<std::string> result; std::string empty_string; boost::algorithm::split( result, empty_string,boost::algorithm::is_any_of( "\t" ),boost::algorithm::… [View More]

1 0

[Accumulators] How to define the initial value ?
by Adrien Todeschini 13 Oct '10

13 Oct '10

Hi everyone, As the code of weighted_sum_impl constructor is [ in header <boost/accumulators/statistics/weighted_sum.hpp> ] template<typename Args> weighted_sum_impl(Args const &args) : weighted_sum_( args[parameter::keyword<Tag>::get() | Sample()] * numeric::one<Weight>::value ) { } and the template parameter Tag is defined as tag::sample namespace tag { struct weighted_sum : depends_on<> { typedef accumulators:… [View More]

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[serialization] Deserialization of a float whose value is infinite throws an archive_exception ("stream error")
by Luca 12 Oct '10

12 Oct '10

Hello, using the Boost.Serialization library version 1.43, I saved to an XML archive a float number which has a value of infinite; then loading that XML file leads to a boost::archive::archive_exception, exception.what() return "stream error". The source code to reproduce the problem is the following: #include <boost/serialization/serialization.hpp> #include <sstream> #include <boost/archive/xml_woarchive.hpp> #include <boost/archive/xml_wiarchive.hpp> #include <… [View More]

2 1

[asio]How to insure async handles not be called after calling deadline_timer::cancel()?
by 鑫炜廖 12 Oct '10

12 Oct '10

The document says, If the timer has already expired when cancel() is called, then the handlers for asynchronous wait operations will: have already been invoked; or have been queued for invocation in the near future. These handlers can no longer be cancelled, and therefore are passed an error code that indicates the successful completion of the wait operation. Does this mean that async handlers may be called after calling deadline_timer::cancel() (say, the second curcumstance) ? If … [View More]

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Re: [Boost-users] boost 1.44.0 undefined reference to boost::filesystem2::no_check
by Asif Fayyaz 12 Oct '10

12 Oct '10

No, that issue is a bit different and I have already included <boost/filesystem.hpp> I am again posting the code: --------------------------------Sample application source: #include <stdio.h> #include <boost/filesystem.hpp> int main() { std::string m_FileName(boost::filesystem::path("testfile1.txt", boost::filesystem::no_check).native_file_string()); printf("Testboost.....%s\n", m_FileName.c_str()); return 0; } -------------------------------- Asif ---------- … [View More]

3 2

Distance/size of boost ranges for std::set.
by Matthew Gwynne 12 Oct '10

12 Oct '10

Hi, I'm working within a C++ library which makes extensive use of the range concept, and also of boost::size. The current version of the library makes use of boost 1_38, however, updating to the newer versions of boost, I've had to replace boost::size with boost::distance as some of the ranges involved, such as std::set don't have random access iterators. However, this presents a problem - it's not really acceptable within our application to have linear time complexity for the size operation … [View More]

3 3

[shared_ptr] Better support for allocators
by Alex Dubov 12 Oct '10

12 Oct '10

Greetings. shared_ptr<> can be constructed with both custom allocator and deleter. However, there's an unfortunate shortcoming: if the held object needs to do some unusual housekeeping on itself during destruction, it needs to store an additional copy of the allocator or rely on some other custom functionality. It would be considerably more convenient, if shared_ptr<> could invoke a custom deleter with allocator (optionally) supplied: virtual void sp_counted_impl_pda::dispose() {… [View More]

1 0

Variadic Macro Data library in the Boost sandbox
by Edward Diener 12 Oct '10

12 Oct '10

This may interest end-users who use macros/Boost PP in their own code to do preprocessor metaprogramming. I have put in the Boost sandbox the Variadic Macro Data library, or VMD. This library supplies variadic macro functionality and integrates variadic macros with the Boost PP library without changing the latter in any way. The library in the sandbox is in the variadic_macro_data folder. The library is a header-only library of macros. There is documentation and tests and the appropriate … [View More]

1 0

[array][bind] Binding boost array to a boost function
by Ryan McConnehey 11 Oct '10

11 Oct '10

I'm trying to bind a boost array to be called at a later time. This is giving me a lot of errors. Is what I'm attempting possible? Ryan template<typename T, std::size_t U> class Sorter { private: typedef boost::function<void(boost::array<T, U> & a)> t_SortFunction; t_SortFunction m_SortFunction; public: Sorter(t_SortFunction func) : m_SortFunction(func) {} bool sort(boost::array<T, U> & a) { m_SortFunction(a); } }; template<typename … [View More]

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[filesystem][v3] remove_all and system::error_code error?
by valblade 11 Oct '10

11 Oct '10

Hi everyone, First of all, I want to thanks boost::filesystem contributors for their amazing work. I have a question in the recent filesystem V3. when using boost::uintmax_t remove_all(const path& p, system::error_code* ec=0); like this : ----------- listing ----------------------- remove_all("C:\\test_path_to_delete"); ------------- end listing --------------- the "C:\\test_path_to_delete" (and its descendent) is successfully deleted (as described in documentation) but when I … [View More]

1 0

Re: [Boost-users] boost 1.44.0 undefined reference to boost::filesystem2::no_check
by Asif Fayyaz 11 Oct '10

11 Oct '10

Any one?? any idea? Waiting for response in this regard. Asif -- Muhammad Asif Fayyaz Address: 42A:10 Kista Allevag. 16455 Kista Stockholm Sweden. Mobile: (+46)0707446631 Profile: http://www.isk.kth.se/~mafayyaz/

2 1

[asio] accepting all connections in a seperate thread - how?
by for-gmane 11 Oct '10

11 Oct '10

My server app needs to be "highly responsive". Ie. it shall handle connection attemps with a higher priority. Currently it has the following problem: if a handler function like the one below takes too much time, then unfortunately no new connections will be handled as long as the operation below lasts (ie. new connections have to wait). Which alternatives are there to solve this problem? (I was thinking of doing the accept in a seperate thread, but not sure how and whether that would work?) … [View More]

3 5

AIX and Boost.PropertyTree
by Will Mason 10 Oct '10

10 Oct '10

Hello, I'm using Boost 1.42, IBM XL C++ 10.1, and AIX 5.3. I'm running into trouble building code that uses Boost.PropertyTree. I get errors compiling the following code, which works fine on numerous other platforms: boost::property_tree::ptree pt; pt.put(LOG_FILE_KEY, props.log_file_name()); pt.put(LOG_LEVEL_KEY, props.log_level()); pt.put(LOG_NAME_KEY, props.log_name()); pt.put(LOG_FILE_SIZE_MAX_KEY, props.log_file_max_size()); pt.put(… [View More]LOG_TO_CONSOLE_KEY, props.log_to_console()); pt.put(MESSAGE_MAX_KEY, props.message_max_size()); pt.put(SCAN_THREADS_KEY, props.scan_threads()); std::ostringstream prop_info; boost::property_tree::ini_parser::write_ini(prop_info, pt); The errors, all of which are attributed to the last line of code above, are: "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 55.28: 1540-0129 (S) The qualifier "subs" is not defined in the current scope. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 78.34: 1540-0129 (S) The qualifier "subs" is not defined in the current scope. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 91.42: 1540-0716 (S) The template argument "boost::iterator" does not match the template parameter "class Iterator". "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 101.42: 1540-0274 (S) The name lookup for "const_iterator" did not find a declaration. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 101.42: 1540-1226 (I) Declarations for non-dependent names are resolved in the template definition. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 101.42: 1540-1227 (I) "const_iterator" does not depend on a template argument. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 116.51: 1540-0129 (S) The qualifier "subs" is not defined in the current scope. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 138.45: 1540-0129 (S) The qualifier "subs" is not defined in the current scope. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/detail/ptree_implementation.hpp", line 78.34: 1540-0129 (S) The qualifier "subs" is not defined in the current scope. "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/property_tree/ini_parser.hpp", line 231.45: 1540-0700 (I) The previous message was produced while processing "class boost::property_tree::basic_ptree<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,struct std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >::const_iterator". The release notes for Boost 1.42 at http://www.boost.org/users/news/version_1_42_0 claim that my combination of OS, compiler and Boost version are supported. I was wondering if anyone might know of a way around this problem besides not using Boost.PropertyTree. Thanks very much for any help, Will [View Less]

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[fusion] deduce type of resulting vector from a transformation
by alfC 10 Oct '10

10 Oct '10

Hi, (I keep struggling with Boos.Fusion.) How do I deduce the type of the vector resulting from the transformation of another vector? I have a source vector of different types, e.g. vector<quantity<si::length>, quantity<si::mass>, quantity<si::time> > and I have a transformation that is well defined and returns another type depending on the original type. The question is how do I generate a vector type that is the result of the given transformation. I though that … [View More]

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[boost-install]update old version to new one by 'bjam install'
by hongleij 10 Oct '10

10 Oct '10

i have install 1.43 version in my system,after use “./bjam install” to intall boost1.44,i met the following error. [root@localhost gridcast]# g++ -o datetime datetime_tcp_async_server.cpp -lpthread -lboost_system -L/usr/local/lib datetime_tcp_async_server.cpp:142:2: 警告：文件未以空白行结束 /tmp/ccjG0R2d.o: In function `__static_initialization_and_destruction_0(int, int)': datetime_tcp_async_server.cpp:(.text+0x16c): undefined reference to `boost::system::get_system_category()' … [View More]datetime_tcp_async_server.cpp:(.text+0x176): undefined reference to `boost::system::get_generic_category()' datetime_tcp_async_server.cpp:(.text+0x180): undefined reference to `boost::system::get_generic_category()' datetime_tcp_async_server.cpp:(.text+0x18a): undefined reference to `boost::system::get_generic_category()' datetime_tcp_async_server.cpp:(.text+0x194): undefined reference to `boost::system::get_system_category()' /tmp/ccjG0R2d.o: In function `boost::asio::error::get_system_category()': datetime_tcp_async_server.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[boost::asio::error::get_system_category()]+0x7): undefined reference to `boost::system::get_system_category()' /tmp/ccjG0R2d.o: In function `boost::system::error_code::error_code()': datetime_tcp_async_server.cpp:(.text._ZN5boost6system10error_codeC1Ev[boost::system::error_code::error_code()]+0x10):undefined reference to `boost::system::get_system_category()' collect2: ld 返回 1 so i delete /usr/local/include/boost dir ,and rerun ”./bjam install” -bash-3.2# g++ datetime_tcp_async_server.cpp -lpthread datetime_tcp_async_server.cpp:142:2: warning: no newline at end of file /tmp/ccQeKssV.o: In function `__static_initialization_and_destruction_0(int, int)': datetime_tcp_async_server.cpp:(.text+0x176): undefined reference to `boost::system::generic_category()' datetime_tcp_async_server.cpp:(.text+0x182): undefined reference to `boost::system::generic_category()' datetime_tcp_async_server.cpp:(.text+0x18e): undefined reference to `boost::system::system_category()' /tmp/ccQeKssV.o: In function `boost::system::get_system_category()': datetime_tcp_async_server.cpp:(.text._ZN5boost6system19get_system_categoryEv[boost::system::get_system_category()]+0x5): undefined reference to `boost::system::system_category()' /tmp/ccQeKssV.o: In function `boost::system::error_code::error_code()': datetime_tcp_async_server.cpp:(.text._ZN5boost6system10error_codeC1Ev[boost::system::error_code::error_code()]+0x17): undefined reference to `boost::system::system_category()' collect2: ld returned 1 exit status --------------------------------- the name changed from `boost::system::get_generic_category()' to `boost::system::generic_category()',so it seems if i already have an old version of boost,i need remove it clearly to reinstall the new one by myself. [View Less]

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[boost.datetime] query
by Sean Farrow 10 Oct '10

10 Oct '10

Hi: Is it possible to return a number representing the date. Like you can with COleDateTime.m_dt; Any help appreciated. Regards Sean.

3 2

[asio] How to get informed about failed connection attempts?
by for-gmane 10 Oct '10

10 Oct '10

The following code (from the examples) accepts a connection and calls the handler handle_accept(). But it calls the handler only if the connection attempt (internally) succeeds. The handler gets not called if the connection fails (for example when an ssl-connection-attempt fails due to wrong keys etc.). What should I do to get informed also about such failed connection attempts? acceptor_.async_accept(new_session->socket(), boost::bind(&server::handle_accept, this, new_session, boost::asio::placeholders::error));

1 0

Memory usage
by Olivier Tournaire 10 Oct '10

10 Oct '10

Hi all, Is there a (portable) way with boost libs to check memory usage? Best regards, Olivier

4 3

Http Server 3 example with SSL, ie. https
by for-gmane 09 Oct '10

09 Oct '10

Hi, has anybody extended the Http Server 3 example with SSL, ie. https? Are there any other simple https-server examples based on asio?

1 0

AIX large file support
by Will Mason 09 Oct '10

09 Oct '10

Hello, I'm using Boost 1.42, IBM XL C++ 10.1, and AIX 5.3. On AIX the way to enable large file support is to define _LARGE_FILES on the compiler command line. When I attempt to build Boost with this definition, I see errors like the following: "/home/wmason/src/cap-aix/fim/../opt/include/aix/boost/v1.42/boost/date_time/date_parsing.hpp", line 50.21: 1540-0215 (S) The wrong number of arguments have been specified for "tolower(int)". This causes catastrophic failure of Boost to build. … [View More]

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[proto] Can't use template domain class with BOOST_PROTO_BASIC_EXTENDS
by joel falcou 09 Oct '10

09 Oct '10

Trying to use template domain class with BOOST_PROTO_BASIC_EXTENDS ends up in an error leading to the fact this ligne in the macro is incorrect when the Domain is template: BOOST_PROTO_BASIC_EXTENDS_(Expr, Derived, Domain) typedef void proto_is_aggregate_; typedef Domain::proto_generator proto_generator; Obviously this is alckign a typename before Domain::proto_generator if Domain is actually a template class. Thing is used to work before ( aorund 1.40) so I guess somethign … [View More]

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[variant][any] template parameterized variant
by alfC 09 Oct '10

09 Oct '10

Hi, I need a variant type object that can hold any type characterized by a template. For example Boost.Units have a family of types parameterized by "System". quantity< unit<dimension, System>, double> suppose dimension is fixed, e.g. typedef boost::units::length dimension is it possible to define a variant over that family of types? I could create a make_variant_over< list of all types > but that can be that list will be fixed and each time I defined a new System the … [View More]

4 3

[fusion] .at<N>() template member in containers?
by alfC 09 Oct '10

09 Oct '10

Hi, Excuse my simple minded questions. Sometimes by asking this question (often with negative answer) I understand more on the design of the Boost libraries. Besides possible redundancy, why is that the fusion containers, for example fusion::vector, doesn't have a template member function to extract elements? fusion::vector<double, int, std::string> stuff(1.2, 3, "hola"); stuff.at<2>(); //returns "hola", just like at_c<2>(stuff); Wouldn't it be more consistent with std::… [View More]

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boost/preprocessor checking if argument is a constant
by Z S 09 Oct '10

09 Oct '10

All the BOOST_PP functions only work on integer constants. I want to write macros, where the same interface can be used for both constants and variables, and only call the BOOST_PP if the argument is a constant, and use runtime code if it is a variable. For example, #define TWICE(n) BOOST_PP_IF( _IS_CONSTANT(n), \ BOOST_PP_MUL(n,2), \ ( (n) * 2) ) For more details, you can also see the original question here : http://stackoverflow.… [View More]

4 3

Re: [Boost-users] Boost Logos: proposed high constrast logo
by Zoltan Juhasz 08 Oct '10

08 Oct '10

Follow up on the original topic: I've uploaded a high-contrast version of the Boost Logo, and moved all other logo related resources to the follow Google Docs folder: https://docs.google.com/leaf?id=0B_WA6oW88X1UZWZiNzUwYzctYzg1NS00ZmY5LTllMD… On the logo discussion: Various explanation could be made for the logo. For some these are molecular structures; for others this is a small matrix of hexagonal cells from a beehive; some may claim these are interconnected - in some places overlapping … [View More]

2 3

[proto] baby steps learning with proto, proxy object
by alfC 08 Oct '10

08 Oct '10

Hi, This can be an exercise for definining the scope of Boost.Proto for little things. I have a histogram class that internally looks like this class histogram{ ... bool operator()(double const& x){return impl.increment(x);} bool operator()(double const& x, double const& weight){return impl.accumulate(x, weight);} }; histogram h( .. bin spec .. ); double x = ... ; so to add a count to the bin of x, I call h(x); to add a count with weigh w to bin x, I call h(x,w); so far so … [View More]

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How to abort boost test execution on the failure of any BOOST_TEST_CASE
by Gaurav N Shah 08 Oct '10

08 Oct '10

Hi, I have sample code like this: void test1() { BOOST_REQUIRE(2 ==1); } void test2() { BOOST_CHECK(1 !=1); } boost::unit_test::test_suite* ts1 = BOOST_TEST_SUITE( "test_suite1" ); ts1->add(BOOST_TEST_CASE(&test1)); ts1->add(BOOST_TEST_CASE(&test2)); ::boost::framework::master_test_suite().add(ts1); In this case I do not want test2 function to be executed it test1 fails. How is it possible?? (I can not merge code in test1 and test2 into single function) Thank You,… [View More]

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Program Options.. Specifying "-e" as an option value.....
by david.weber＠l-3com.com 08 Oct '10

08 Oct '10

I have an application, which spawns off other applications. As input, it takes in environment variables and arguments to pass to the resultant application. For instance: mutate -E "env_var1=val" -a "." ls This will run: ls . and the environment will only have "env_var1" equal to "val" So. Something funny comes along when I try to pass "-e" as an argument. So, in the above would be: mutate -a "-e" -a "foo" xterm The program options parser attempts to … [View More]

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[Boost.Log] How to link with on MSVC 2008?
by RUOFF, LARS (LARS)** CTR ** 08 Oct '10

08 Oct '10

Hello, i have found the following instructions to build Boost.Log: > Boost.Log can be compiled by: > > 1. Getting 1.42 source release > 2. Unpacking Boost.Log on top of it > 3. Following the usual procedure: > > .\bootstap.bat > .\bjam --with-log I did the above starting from a 1.44 source release. This worked out well. But when trying to use the library I get a lot of linker errors in my project: 1>Linking... 1>libboost_log-vc90-mt-gd-1_44.lib(… [View More]

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[Math] Best Way to Produce Pi
by Hossein Haeri 08 Oct '10

08 Oct '10

Dear all, What's my best way to define a constant for Pi. I'm thinking of using the following <cmath> stuff: const double pi(4 * atan(1)); Does Boost provide a better solution? TIA, --Hossein

4 4

[boost-users] [bind][function] - too many copies
by Lorimer, Stephen 08 Oct '10

08 Oct '10

For a given member function of the form void foo::f0(), passing this to boost bind results in the class instance being copied 7 times. Storing the result of bind in boost function incurs another 11 copies (code and results are here: http://boost.codepad.org/6jBmoKuj) Using tr1::bind and function has slightly better results, but still not ideal: Doing just tr1::bind results in the class instance being copied 4 times. Storing the result of bind in tr1 function incurs another 3 … [View More]copies (code and results are here: http://boost.codepad.org/w1EV6JBY) Am I right in saying this is because boost::bind uses normal templates while tr1::bind uses variadic templates? Either way this is not very efficient. Is there a way to improve this? ---------------------------------------------------------------------- This message w/attachments (message) is intended solely for the use of the intended recipient(s) and may contain information that is privileged, confidential or proprietary. If you are not an intended recipient, please notify the sender, and then please delete and destroy all copies and attachments, and be advised that any review or dissemination of, or the taking of any action in reliance on, the information contained in or attached to this message is prohibited. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Sender. Subject to applicable law, Sender may intercept, monitor, review and retain e-communications (EC) traveling through its networks/systems and may produce any such EC to regulators, law enforcement, in litigation and as required by law. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or free of errors or viruses. References to "Sender" are references to any subsidiary of Bank of America Corporation. Securities and Insurance Products: * Are Not FDIC Insured * Are Not Bank Guaranteed * May Lose Value * Are Not a Bank Deposit * Are Not a Condition to Any Banking Service or Activity * Are Not Insured by Any Federal Government Agency. Attachments that are part of this EC may have additional important disclosures and disclaimers, which you should read. This message is subject to terms available at the following link: http://www.bankofamerica.com/emaildisclaimer. By messaging with Sender you consent to the foregoing. [View Less]

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Boost Logos: proposed high constrast logo
by Alfredo Correa 08 Oct '10

08 Oct '10

Hi all, In my opinion there should be a high contrast version of the Boost logo . (by that I mean either black and white or high contrast with very mild gradients on white background). Particularly I am talking about the three hexagons icon. As an example, the first attachment here has the official logo in SVG format. Because of the background gradient and the gradient fill of the hexagon it is not *obvious* how to convert this to high contrast. What should be replaced by black (or solid blue)… [View More]

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[statechart] Unhandled events
by Oleg Smolsky 07 Oct '10

07 Oct '10

Hey there, I've been using SC for a while and something has been bugging me - given a state machine with: OuterSt, OneSt and TwoSt as well as OneEv and TwoEv that are handled by OneSt and TwoSt respectively, it is possible to send a wrong event to either of the last two states. Such an "unhandled" event will be forwarded to OuterSt and then quietly eaten. My question is as follows - is it possible to define some kind of "catch all" handler in the OuterSt? I have already fixed a … [View More]

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[boost-spirit qi] internal copies
by Ovanes Markarian 07 Oct '10

07 Oct '10

Hello *, I think this is more the question to spirit devlopers. I would like to know how spirit internally maintains the parsed data? Here is an example of what I mean. I have to parse some byte sequence represented as hex pairs: 00 ce ab 00 de ad be ef ... If I use the parser like this: boost::spirit::qi::uint_parser<unsigned char, 16, 2,2> hex_byte; std::string str("..."); std::vector<byte_t> vec; iter_type curr=str.begin(), end=str.end(); bool r=phrase_parse(curr, end, +… [View More]

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[boost::math]binomial_coefficient compile error
by Suresh Kumar 07 Oct '10

07 Oct '10

Hi this code gives a compile error. #include <iostream> #include <boost/math/special_functions/binomial.hpp> using namespace std; int main(){ cout << boost::math::binomial_coefficient(10,1) << endl; } binom.cpp:8: error: no matching function for call to ‘binomial_coefficient(int, int)’ what is that I am missing? thanks suresh -- R Suresh Kumar, http://www.ee.ucr.edu/~sramachandranna Sarve bhavantu sukinaha (May everyone be happy) Sarve santu niramiyaha (May … [View More]

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[Python] Unable to use static library of boost.python due to undefined symbols
by Philipp Münzel 06 Oct '10

06 Oct '10

Hi folks, I'm trying to build a python extension with statically linked libboost_python on Linux. I built boost_python with ./bjam -q --layout=system --with-python toolset=gcc variant=release link=static threading=multi runtime-link=static which results in a 700kb libboost_python.a Then I try to build the hello world example located at /libs/python/example/tutorial but I fail, because their remain undefined symbols, despite the fact I did define BOOST_PYTHON_STATIC_LIB. Heres what I did:… [View More] $ cat hello.cpp // Copyright Joel de Guzman 2002-2004. Distributed under the Boost // Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt // or copy at http://www.boost.org/LICENSE_1_0.txt) // Hello World Example from the tutorial // [Joel de Guzman 10/9/2002] #include <boost/python/module.hpp> #include <boost/python/def.hpp> char const* greet() { return "hello, world"; } BOOST_PYTHON_MODULE(hello_ext) { using namespace boost::python; def("greet", greet); } $ g++ -I/usr/local/include -I/usr/include/python -DBOOST_PYTHON_STATIC_LIB -fpic -c -o hello.o hello.cpp $ g++ -shared -Wl,-soname,"libhello.so" -L/usr/local/lib -lboost_python -fpic -o libhello.so hello.o $ nm -u libhello.so U PyString_Type w _Jv_RegisterClasses U _Py_NoneStruct U _Unwind_Resume@@GCC_3.0 U _ZN5boost6python6detail11init_moduleEPKcPFvvE U _ZN5boost6python6detail12gcc_demangleEPKc U _ZN5boost6python6detail17scope_setattr_docEPKcRKNS0_3api6objectES3_ U _ZN5boost6python7objects15function_objectERKNS1_11py_functionE U _ZN5boost6python7objects21py_function_impl_baseD2Ev U _ZN5boost6python9converter19do_return_to_pythonEPKc U _ZN5boost6python9converter8registry5queryENS0_9type_infoE U _ZNK5boost6python7objects21py_function_impl_base9max_arityEv U _ZNK5boost6python9converter12registration25expected_from_python_typeEv U _ZTIN5boost6python7objects21py_function_impl_baseE U _ZTIPKc@@CXXABI_1.3 U _ZTIc@@CXXABI_1.3 U _ZTVN10__cxxabiv120__si_class_type_infoE@@CXXABI_1.3 U _ZTVN5boost6python7objects21py_function_impl_baseE U _ZdlPv@@GLIBCXX_3.4 U _Znwm@@GLIBCXX_3.4 U __cxa_atexit@@GLIBC_2.2.5 w __cxa_finalize@@GLIBC_2.2.5 U __cxa_guard_abort@@CXXABI_1.3 U __cxa_guard_acquire@@CXXABI_1.3 U __cxa_guard_release@@CXXABI_1.3 w __gmon_start__ U __gxx_personality_v0@@CXXABI_1.3 $ python >>> import libhello Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: ./libhello.so: undefined symbol: _ZNK5boost6python7objects21py_function_impl_base9max_arityEv The example works marvellous when using the shared lib of boost_python, but it has to be a static build for me. I found a mailing list entry from 2002 mentioning the static build of boost.python was broken, but that is for sure fixed by now, isn't it? Regards, Philipp [View Less]

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[Fusion] How to join more than two sequences
by Clinton Mead 06 Oct '10

06 Oct '10

Hi All I've noticed the function "join" in the boost fusion library. However, it only joins two sequences. Was wondering whether there is (or can be easily made) a function that joins any number of sequences. For example: new_join(make_vector(1,2,3), make_vector(4,5), make_vector(6)) -> is the sequence 1,2,3,4,5,6 AND/OR (pass parameters in a sequence) new_join(make_vector(make_ vector(1,2,3), make_vector(4,5), make_vector(6))) -> is the sequence 1,2,3,4,5,6 I'd prefer both the … [View More]

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[filesystem] V3 path::replace_extension() spans path components
by Timothy Madden 06 Oct '10

06 Oct '10

Hello It appears that in boost 1.44.0 filesystem V3 path("\Cristina.ADI\Local Settings").replace_extension(".png") just returns "\Cristina.png" instead of "\Cristina.ADI\Local Settings.png" Could this be fixed ? Thank you, Timothy Madden

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[proto]Compile issue on Sun Solaris 10, Sun Studio 12.2
by Sascha Ochsenknecht 06 Oct '10

06 Oct '10

Hello, I got an error from the Sun Studio 12.2 (CC 5.11) when trying to compile my sources. The error comes out of the Boost.Proto library (actually I'm doing something with Boost.Spirit and Boost.Spirit is using Boost.Proto ..., but I don't think that the problem is in the client code, it seems to come from the buggy compiler). I'm using Boost 1.43. This is what I got from the compiler: "...include/boost/proto/detail/decltype.hpp", line 343: Error: Partial specialization parameter V is not … [View More]used in the arguments. "...include/boost/proto/transform/arg.hpp", line 287: Error: Partial specialization for boost::proto::_byval::result has identical arguments. "...include/boost/proto/extends.hpp", line 600: Error: type is not a member of boost::result_of<boost::proto::domainns_::default_domain>. "...include/boost/spirit/home/support/terminal.hpp", line 237: Where: While specializing "boost::proto::exprns_::extends<boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<boost::spirit::tag::bin>, 0>, boost::spirit::terminal<boost::spirit::tag::bin>, boost::proto::domainns_::default_domain, 0>". (the following is talking about "include/boost/proto/detail/decltype.hpp", line 343) With g++ this code compiles without any problems and runs as expected. Searching around the internet, I got the following bug entry of the Sun Studio compiler: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6926895 It looks like a similar problem. The bug entry contains a small example which reproduces the compile error: template <typename T> struct test { T t; }; template <typename T, typename X> struct test<X T::*> { X T::* x; }; template <typename T> struct test2 {}; template <typename T, typename X> struct test2< test<X T::*> > { test<X T::*> xt; }; int main() { test<int> a; a.t = 1; int test<int>::* s = &test<int>::t; test<int test<int>::*> a2; a2.x = s; test2<test<int test<int>::* > > a3; a3.xt = a2; return a.*a3.xt.x; } $ CC example.C "example.C", line 4: Error: Partial specialization parameter T is not used in the arguments. The bug entry also provides a workaround which seems to work. Replace the template types with the following: template <typename T> struct helper { }; template <typename T> struct test2 : public test2< helper<T> > { }; template <typename T> struct test2<helper< T> > { } ; template <typename T, typename X > struct test2< helper<test<X T::* > > {test<X T::*> xt; }; I would like to try a similar workaround adapted to the Boost.Proto source code. I tried several things but since I'm not fully aware what is going on in the proto sources and what is the exact reason the compiler fails, I couldn't make it work so far. Does anybody had a similar problem or does anybody know how to adapt the Boost.Proto source to make the Sun compiler happy? BTW: For me it would be ok for now to patch my local Boost source files. Here is the snippet from proto/detail/decltype.hpp: //////////////////////////////////////////////////////////////////////////////////////////// // result_of_ is a wrapper around boost::result_of that also handles "invocations" of // member object pointers. template<typename T, typename Void = void> struct result_of_ : boost::result_of<T> {}; // THE FOLLOWING IS TROUBLE MAKER FOR THE SUN COMPILER -> template<typename T, typename U, typename V> struct result_of_<T U::*(V), typename enable_if_c<is_member_object_pointer<T U::*>::value>::type> { BOOST_STATIC_CONSTANT(bool, is_V_a_smart_ptr = 2 == sizeof(test_V_is_a_U<U>(&lvalue(make<V>())))); BOOST_STATIC_CONSTANT(bool, is_ptr_to_const = 2 == sizeof(test_ptr_to_const(BOOST_PROTO_GET_POINTER(U, make<V>())))); // If V is not a U, then it is a (smart) pointer and we can always return an lvalue. // Otherwise, we can only return an lvalue if we are given one. typedef typename mpl::eval_if_c< (is_V_a_smart_ptr || is_reference<V>::value) , mpl::eval_if_c< is_ptr_to_const , add_reference<typename add_const<T>::type> , add_reference<T> > , mpl::identity<T> >::type type; }; Thanks in advance, Sascha [View Less]

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boost 1.44.0 undefined reference to boost::filesystem2::no_check
by Asif Fayyaz 06 Oct '10

06 Oct '10

Hi, I am compiling a very simple application using boost filesystem. However it is giving following error message: "undefined reference to `boost::filesystem2::no_check(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'" Here is the simple application source: --------------------------------Sample application source: #include <stdio.h> #include <boost/filesystem.hpp> int main() { std::string m_FileName(boost::filesystem::path("… [View More]

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Re: [Boost-users] Users! Who'd like to wave goodbye to #ifdef
by Paul Kerchen 06 Oct '10

06 Oct '10

+1 for removing VC6 support. Paul Kerchen

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Re: [Boost-users] Problems with boost 1.44.0 and MSVC: deque problem seems solved, but the boost::ctor problem remains
by Yana A Kireyonok (aka Iron Bug) 06 Oct '10

06 Oct '10

> Date: Tue, 5 Oct 2010 11:37:35 +0200 > From: Igor R <boost.lists(a)gmail.com> > 2010/10/5 Yana A Kireyonok (aka Iron Bug) <death.iron.bug(a)gmail.com>: >> Greetings, ppl. >> I've got strange problems with the latest stable boost (1.44.0) and >> MSVS studios 2005 and 2010. >> ... > According to your description, it seems that the issue you encountered > is only a symptom of some memory-management issue in your code >..... Well, it could … [View More]

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[Fusion] fusion vector transformation into another fusion vector transformation.
by alfC 05 Oct '10

05 Oct '10

I have class that is parameterized by several type (Boost::Unit units type). template<class U1, class U2, ... > class A{ A(quantity<U1> q1, quantity<U2> q2, ... ){} }; since the number of arguments is arbitrary I though it would be a good idea to use either MPL sequence and Tuples. Or better yet a fusion::vector. so the class will be parametrized by a fusion::vector or unit types. template<class FusionOfUnits> //or class MPLofUnits class A{ A(FusionOfQuantities fq)… [View More]

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timezone database discrepancy
by archie14 05 Oct '10

05 Oct '10

I am calculating start/end time of the daylight savings time using tz_database and default timezone database file "date_time_zonespec.csv" that comes with boost 1_44. I found discrepancy between results of the calculation for "America/Chicago" region and published data. for years 2010-2007 the results match. However, for the 2006 calendar year, published results from several sources are: Start: April 2 End: October 29 and calculated results are: Start: March 12 End November 5 I will … [View More]

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Re: [Boost-users] [proto] need explanation in implementing distributive law
by Mauro Bianco 05 Oct '10

05 Oct '10

Hi all, It is probably already been discovered by everyone at this point, but the code proposed by Andrew does not to work properly to apply distributivity more than once in an expression [works for a*(b+c) but not for a*(b+c*(d+c)) ] Here a modified version that seems to work recursively. How does it look? struct distr : proto::or_< proto::when< proto::multiplies< proto::_, proto::plus< proto::_, proto::_ > >, proto::call<distr( // THIS IS TO … [View More]

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Serialize a class, call new() in constructor
by Michael Reichlin 05 Oct '10

05 Oct '10

Hi everybody, actually i have a big problem with serializing some of my classes. The problem is, that classA class calls new of classB in constructor and after that the load_construct_data is called and also calls a new of classB. So I have two objects of classB. Here is my code: classA.h: class CClassA { template<class Archive> friend void serialize(Archive &ar, CClassA &cCClassA, const unsigned int version); template<class Archive> … [View More]friend void save_construct_data(Archive &ar, const CClassA *cCClassA, const unsigned int version); template<class Archive> friend void load_construct_data(Archive &ar, CClassA *cCClassA, const unsigned int version); // *** Aufzählungen **************************************************************************** public: CClassB* pClassB; // *** Methoden ******************************************************************************** private: protected: int iTest; public: CClassA(int iTest); // Konstruktor virtual ~CClassA(); // Destruktor // Get/Set-Methoden }; classA.cpp: CClassA::CClassA(int iTest) :iTest(iTest) { pClassB = new CClassB(iTest); } classB.h: class CClassB { template<class Archive> friend void serialize(Archive &ar, CClassB &cCClassB, const unsigned int version); template<class Archive> friend void save_construct_data(Archive &ar, const CClassB *cCClassB, const unsigned int version); template<class Archive> friend void load_construct_data(Archive &ar, CClassB *cCClassB, const unsigned int version); // *** Aufzählungen **************************************************************************** public: // *** Datenmember ***************************************************************************** private: protected: public: // *** Methoden ******************************************************************************** private: protected: int iTestInt; public: CClassB(int iTest); // Konstruktor virtual ~CClassB(); // Destruktor // Get/Set-Methoden static unsigned int count; }; serialize.h template<class Archive> void serialize(Archive &ar, CClassA &cCClassA, const unsigned int version) { ar & boost::serialization::make_nvp("ClassB", cCClassA.pClassB ); } template<class Archive> void save_construct_data(Archive &ar, const CClassA *cCClassA, const unsigned int version) { ar << boost::serialization::make_nvp("Test", cCClassA->iTest); } template<class Archive> void load_construct_data(Archive &ar, CClassA *cCClassA, const unsigned int version) { int iTest; ar >> boost::serialization::make_nvp("Test", iTest); ::new(cCClassA) CClassA(iTest); } template<class Archive> void serialize(Archive &ar, CClassB &cCClassB, const unsigned int version) { } template<class Archive> void save_construct_data(Archive &ar, const CClassB *cCClassB, const unsigned int version) { ar << boost::serialization::make_nvp("Test", cCClassB->iTestInt); } template<class Archive> void load_construct_data(Archive &ar, CClassB *cCClassB, const unsigned int version) { int iTest; ar >> boost::serialization::make_nvp("Test", iTest); ::new(cCClassB) CClassB(iTest); } Now I just want that only one ClassB will be created. How can I recognize, that ClassB is already generate through cons tructor classA. I just want to serialize the members of classB. Is there a way to solve my problem?? Best regards Michael [View Less]

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[Boost.Log] Problem : Logs with channel and severity
by Aman Feri 05 Oct '10

05 Oct '10

Hello. It's my first post here... I'll try to be quick and sharp. i apologise if i fail. I spend a long time reading the Boost.Log documentation, but I'm lost. I try to generate logs with this Format : [ProcessId][ThreadId[TimeStamp][Channel][Severity] Text For now i succeeded this Format : [ProcessId][ThreadId[TimeStamp][][] Text Here's what i did. Header : ------------------------- class Trace { public : enum SeverityLevels {...}; enum Channels{...}; typedef … [View More]

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weird boost::asio problems opening acceptor
by andrew.marlow＠uk.bnpparibas.com 05 Oct '10

05 Oct '10

I have a server where there must be only one instance of it for a given machine on a given port number. Here is the code I used to try to make that happen: boost::asio::io_service ios; boost::asio::ip::tcp::endpoint primaryEndpoint(boost::asio::ip::tcp::v4(), primaryPort); std::auto_ptr<boost::asio::ip::tcp::acceptor> primaryAcceptor; try { primaryAcceptor.reset(new boost::asio::ip::tcp::acceptor(ios, primaryEndpoint)); primaryAcceptor->open(primaryEndpoint.protocol()); … [View More]

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Problems with boost 1.44.0 and MSVC: boost::mutex::scoped_lock and std::deque in multithreaded application
by Yana A Kireyonok (aka Iron Bug) 05 Oct '10

05 Oct '10

Greetings, ppl. I've got strange problems with the latest stable boost (1.44.0) and MSVS studios 2005 and 2010. The first problem I got (it seems being not dependent on boost version) was the heap allocation exception when using mutex::scoped_lock to guard references to std::deque from different threads in multithreaded application. I used MSVS SP1 compiler I checked it with boost 1.41.0 and it appeared there too, so it's not the bug of the latest version, for sure. I was not sure if it wasn't … [View More]

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Boost: Getting Started on Windows
by Olivier Bertrand 05 Oct '10

05 Oct '10

Using this tutorial I tried to build the first sample with Windows Visual C++ 6.0. All seems correct in the settings, but the compilation failed with the following messages: --------------------Configuration: Sample - Win32 Debug-------------------- Compiling... Lambda.cpp c:\boost_1_44\boost\config\suffix.hpp(588) : error C2039: 'typeinfo' : is not a member of '`global namespace'' c:\boost_1_44\boost\config\suffix.hpp(588) : error C2873: 'typeinfo' : symbol cannot be used in a using-… [View More]

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PGI compile problem with lanczos_sse2.hpp
by Brian Carnes 05 Oct '10

05 Oct '10

I am trying to link to a library that uses some code from boost. So far I have been able to build the code under gcc, intel and pathscale compilers. However, I get about 100 errors from this file under pgi (versions 7.1, 7.2 and 10.1) boost/boost/math/special_functions/detail/lanczos_sse2.hpp I have copied the first few error messages to the end of this email. My suspicion is that some settings are not correct for this compilation under PGI. I did check that the header files used by "… [View More]lanczos_sse2.hpp" were present. I don't have any experience with the SSE/SSE2 optimizations. FYI, our build system uses bjam, so there is a Jamfile for boost, which I can send if needed. Thanks for any assistance, -Brian ****** pgi 7.1 compile errors ******** "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 26: error: identifier "align" is undefined static const ALIGN16 double coeff[26] = { ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 26: error: expected a ";" static const ALIGN16 double coeff[26] = { ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 54: error: a global-scope declaration may not have this storage class register __m128d vx = _mm_load1_pd(&x); ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 54: error: identifier "x" is undefined register __m128d vx = _mm_load1_pd(&x); ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 55: error: a global-scope declaration may not have this storage class register __m128d sum_even = _mm_load_pd(coeff); ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 55: error: identifier "coeff" is undefined register __m128d sum_even = _mm_load_pd(coeff); ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 56: error: a global-scope declaration may not have this storage class register __m128d sum_odd = _mm_load_pd(coeff+2); ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 57: error: a global-scope declaration may not have this storage class register __m128d nc_odd, nc_even; ^ "/scratch/SIERRA_TRILINOS/code/TPLs_src/boost/boost/math/special_functions/detail/lanczos_sse2.hpp", line 57: error: a global-scope declaration may not have this storage class register __m128d nc_odd, nc_even; ^ [View Less]

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[serialization] boost::serialization adds huge amounts of exports to resultant Windows PE file
by Chris Yuen 04 Oct '10

04 Oct '10

Hey guys, I am using boost::serialization from 1.44.0. One thing that I noticed is that linking statically to the serialization libs will add several hundred exports in the final exe file that I get. Using `dumpbin /exports my_program.exe` Here's a brief illustration: Let's say we have a typical Hello World program (code example at the end of this message) that uses `iostream`. Here's what we get when we run `dumpbin /exports my_program.exe`. Dump of file my_program.exe File Type: … [View More]EXECUTABLE IMAGE Summary 4000 .data 2000 .pdata 7000 .rdata 1000 .rsrc 18000 .text However, if we just add 6 lines of code to include boost::serialization (code example at the end of this message), we would get tons of exports. Dump of file my_program.exe File Type: EXECUTABLE IMAGE Section contains the following exports for my_program.exe 00000000 characteristics 4CA376FA time date stamp Thu Sep 30 01:27:22 2010 0.00 version 1 ordinal base 14 number of functions 14 number of names ordinal hint RVA name 1 0 00029480 ??_B?1??get_instance@?$singleton@V?$map@Vtext_oarchive@archive@boost@@@?A0xca82ee40@detail@archive@boost@@@serialization@boost@@CAAEAV?$map@Vtext_oarchive@archive@boost@@@?A0xca82ee40@detail@archive@3@XZ@51 = ??_B?1??get_instance@?$singleton@V?$map@Vtext_oarchive@archive@boost@@@?A0xca82ee40@detail@archive@boost@@@serialization@boost@@CAAEAV?$map@Vtext_oarchive@archive@boost@@@?A0xca82ee40@detail@archive@3@XZ@51 (`private: static class boost::archive::detail::`anonymous namespace'::map<class boost::archive::text_oarchive> & __cdecl boost::serialization::singleton<class boost::archive::detail::`anonymous namespace'::map<class boost::archive::text_oarchive> >::get_instance(void)'::`2'::`local static guard'{2}') 2 1 000294B0 ??_B?1??get_instance@?$singleton@V?$multiset@PEBVextended_type_info@serialization@boost@@Ukey_compare@detail@23@V?$allocator@PEBVextended_type_info@serialization@boost@@@std@@@std@@@serialization@boost@@CAAEAV?$multiset@PEBVextended_type_info@serialization@boost@@Ukey_compare@detail@23@V?$allocator@PEBVextended_type_info@serialization@boost@@@std@@@std@@XZ@51 = ??_B?1??get_instance@?$singleton@V?$multiset@PEBVextended_type_info@serialization@boost@@Ukey_compare@detail@23@V?$allocator@PEBVextended_type_info@serialization@boost@@@std@@@std@@@serialization@boost@@CAAEAV?$multi ...elided This is indeed very strange since compiling a `exe` file shouldn't get me any of these "exports" at all. Anyone has an idea what's going wrong? I am using MSVS2005 Release|x64. I compiled boost with `bjam threading=multi link=static runtime-link=static toolset=msvc-8.0`. Thank you for guidance in advance! Best regards, Chris Yuen // Source code to my_program.exe #include <iostream> #include <sstream> // Uncommenting the following block would introduce tons of // exports in the final exe. Even though this block of code // is never executed. //#include <boost/archive/text_oarchive.hpp> //void nothing() { //std::stringstream stream; //boost::archive::text_oarchive oa(stream); //} int main() { using namespace std; std::cout << "Hello World" << std::endl; return 0; } [View Less]

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[Log] When Boost.Log will became part of Boost?
by Daniele Barzotti 04 Oct '10

04 Oct '10

Hi, this just to ask if someone known when boost.log will be inserted into the main boost tree. Regards, Daniele.

1 0

[Exception] Issue with exception_ptr.hpp when compiling with qcc (gcc V4.4.2)
by christopher.pohl＠etas.com 04 Oct '10

04 Oct '10

Hi all, I'm getting an error using Boost.Exception V1.44 when trying to compile a file which #include's <boost/exception_ptr.hpp> with a QNX 6.5.0 toolchain (gcc 4.4.2): C:/QNX650/host/win32/x86/usr/bin/qcc -Vgcc_ntoppc -c -O -Wc,-Wall -DNDEBUG -I. -IC:/QNX650/target/qnx6/usr/include -EB -me500v2 X:/WORKSPACE/test_boost_exception/tc1.cpp In file included from X:/WORKSPACE/test_boost_exception/boost/exception_ptr.hpp:9, from X:/WORKSPACE/test_boost_exception/tc1.… [View More]

1 0

Boost Logos
by Ruediger Berlich 04 Oct '10

04 Oct '10

Dear all, I remember that there was a discussion a while ago about logos. Among the proposals was a logo of the type "This code uses Boost". I'd like to acknowledge the great work of the Boost library authors and would thus like to add the logo to the manual of our software. Therefore: I cannot find any "official" logos on the Boost web page that would allow me to do this. What has become of this effort ? Best Regards, Ruediger

13 19

Boost Lexer
by Jerry Jeremiah 04 Oct '10

04 Oct '10

At http://www.boost.org/community/review_schedule.html there is a link for the yet to be reviewed Boost Lexer library. It points to http://boost- consulting.com/vault/index.php? action=downloadfile&filename=boost.lexer.zip&directory=Strings%20-%20Text% 20Processing but the directory it goes to has no file that is obviously the Boost Lexer library. Has it been moved somewhere else? Is there somewhere else I could get it from? Also (unrelated) why isn't Boost 1.44 in the table … [View More]

4 5

Boost Lexer
by Jerry Jeremiah 04 Oct '10

04 Oct '10

On the review schedule page ( http://www.boost.org/community/review_schedule.html ) there is a link to download the Boost Lexer library: http://boost-consulting.com/vault/index.php? action=downloadfile&filename=boost.lexer.zip&directory=Strings%20-%20Text% 20Processing But when I click it it takes me to a directory in the Boost Vault that doesn't contain anything that is obviously this library. Is there someplace else to get it? Jerry

3 2

[spirit][qi] Iteration / string iterator
by alfC 03 Oct '10

03 Oct '10

can anybody explain to me why this example from the Spirit.Qi manual works http://www.boost.org/doc/libs/1_44_0/libs/spirit/example/qi/complex_number.… and when I try to use the string iterators directly I get a horrific compiler error? Something to do with string iterators being pointers or something? std::string s = "(2, 3)"; // < line added to example bool r = phrase_parse(s.begin(), s.end(), //< only line changed in the example was (first, last) // … [View More]Begin grammar ( '(' >> double_[ref(rN) = _1] >> -(',' >> double_[ref(iN) = _1]) >> ')' | double_[ref(rN) = _1] ), // End grammar space); Thank you Alfredo error message below: complex_number.cpp: In function 'bool client::parse_complex(Iterator, Iterator, std::complex<double>&) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >]': complex_number.cpp:81: instantiated from here complex_number.cpp:51: error: no matching function for call to 'phrase_parse(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, const boost::proto::exprns_::expr<boost::proto::tag::bitwise_or, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l>, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>&, const boost::proto::exprns_::expr<boost::proto::tag::negate, boost::proto::argsns_::list1<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l>, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>&>, 1l>&>, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l> >, 2l>&, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>, const boost::spirit::ascii::space_type&)' /g/g91/correaa/usr/include/boost/spirit/home/qi/parse.hpp:62: note: candidates are: bool boost::spirit::qi::phrase_parse(Iterator&, Iterator, const Expr&, const Skipper&, boost::spirit::qi::skip_flag::enum_t) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, Expr = boost::proto::exprns_::expr<boost::proto::tag::bitwise_or, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l>, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>&, const boost::proto::exprns_::expr<boost::proto::tag::negate, boost::proto::argsns_::list1<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l>, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>&>, 1l>&>, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l> >, 2l>&, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>, Skipper = boost::spirit::ascii::space_type] /g/g91/correaa/usr/include/boost/spirit/home/qi/detail/parse_auto.hpp: 164: note: bool boost::spirit::qi::phrase_parse(Iterator&, Iterator, Expr&, const Skipper&, boost::spirit::qi::skip_flag::enum_t) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, Expr = const boost::proto::exprns_::expr<boost::proto::tag::bitwise_or, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l>, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>&, const boost::proto::exprns_::expr<boost::proto::tag::negate, boost::proto::argsns_::list1<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l>, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>&>, 1l>&>, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const char&>, 0l> >, 2l>&, const boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::phoenix::reference<double>, boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >&>, 0l> >, 2l>&>, 2l>, Skipper = boost::spirit::ascii::space_type] [View Less]

3 6

[Boost.Units] radians and degrees
by Diederick C. Niehorster 03 Oct '10

03 Oct '10

Dear List, I use VS2010. I have just ventured into Boost.Units as me and my colleagues frequently make errors in our code by mixing up degrees and radians (function takes one but we supply it the other). In some cases a degree representation makes sense, in other the radian representation. Basically, I want to use radian and degree quantities and use implicit conversions to freely interchange between the two (say a user supplies degrees to a function whose declaration asks for radians, or … [View More]

4 4

[asio] Howto bind *client* to a specific port?
by for-gmane 02 Oct '10

02 Oct '10

A NewbieQ: From a client app I want to connect to a server app on a remote host (say port 6666). A requirement is that the client shall be bound to a defined port (say port 5555). How to do this in asio? Does the client need to use an acceptor? (ok, this maybe sounds non-sensical, but who knows... :-)

2 3

[BGL] SPPRC formulation
by Adam Spargo 02 Oct '10

02 Oct '10

Hi, I would like to use the r_c_shortest_paths algorithm. My constraint is that given pairs of vertices i, j (each i have a single mate j) must have a distance between them which is consistent with a given distribution. I am looking for the path which is most consistent with this distribution. Does anybody have any experience of formulating such a constraint in BGL? The second problem is that I am currently modelling the problem with an undirected graph. The edges could be viewed as bi-… [View More]

2 5

Re: [Boost-users] [serialization] boost::serialization adds huge amounts of exports to resultant Windows PE file
by Chris Yuen 02 Oct '10

02 Oct '10

Rober Ramey wrote: > If you want to be really helpful you could do the following: > On your own machine run library_test.sh for the serialization library > for each of the three compilers in release mode and send me the results. > For those compilers which pass, we'll tweak the force_include file > accomodate this new information. I would love to help, but any pointers on how to run it? I tried library_test.bat and library_test.sh and failed: > cd D:\Lib\boost\libs\… [View More]

2 1

CreateProcess
by gast128 02 Oct '10

02 Oct '10

Hello all, I was asking if there is CreateProcess like functionailty in Boost. In our application we lock files, and spawn a process (thru _spawn). However it seems that m$ implemented in this way that handles are inherited by child process. This means that the child process is also getting the handle of the locked file, preventing the main application to write to this locked file. So I was wondering if there is a portable c++ way to create prcoesses. Otheriwse we have to write it … [View More]

5 5

boost serialize - stack overflow for large problems
by "Jörg F. Unger" 01 Oct '10

01 Oct '10

I have implemented the serialization routine for a rather complex structure with many nested classes. The serialization seems to work for small examples, however, for bigger data sets, I get a stack overflow error. If I increase the stack size from 8MB to 20MB, the examples seems to work. However, I'd like to optimize the code the way that I do not need to increase the stack size (especially, since not all users can do that themselves) So here are my questions: 1. Why is the required … [View More]

6 9

boost for embedded systems?
by Jeff Graham 01 Oct '10

01 Oct '10

Hello, I have a Texas Instruments OMAP3 EVM board with an ARMv7 processor and a DSP, running Linux with kernel 2.6.32 and cross compiling with CodeSourcery's gnu g++ 4.3.3. I would like to know if any of boost is usable on this platform? I am most interested in the threading, bind, signals, and asio. I finally found the following page, and although it shows the compiler and hints at the platform, it is not obvious about an OMAP/DaVinci processor... http://www.boost.org/development/… [View More]

2 1

[gil] New IO release
by Christian Henning 01 Oct '10

01 Oct '10

Hi there, a new gil IO extension is ready for download. Here is the link: http://code.google.com/p/gil-contributions/downloads/detail?name=boost_revi… This is the final version that will be used for the boost review. Could someone try to build documentation on Linux? Thanks to all people that have helped me out. Regards, Christian

1 0

[BGL] visualizing large graphs
by Cedric Laczny 01 Oct '10

01 Oct '10

Hi, although this might seem a bit off-topic, I think it is an important topic and might be very well interesting for some of us. The boost graph library provides methods to export graphs e.g. for the use with graphviz. However, this is a rather "one-way" solution. Besides that, it is difficult to handle large graphs with graphviz. Therefore, I was wondering if there have been some recent developments here? I would especially be interested in a solution that allows the direct … [View More]

6 12

[python] base::get_override() exception set
by Trigve Siver 01 Oct '10

01 Oct '10

Hi, when calling get_override() method while trying to find python overload and overload is not found exception in python is set. This is because PyObject_GetAttrString() is used for retrieving the attribute. If attribute is not found, PyObject_GetAttrString() set the exception. This is using python 3.1. I've created ticket https://svn.boost.org/trac/boost/ticket/4701 with patch. Could anyone look at this? Thanks Trigve

1 0

[format] print float number with fixed number of decimals *and* integer digits
by alfC 01 Oct '10

01 Oct '10

I always found the rules for printf formatting, which Boost.Format uses, cryptic. I usually find the right combination by trial and error. In this case I want to print decimal numbers with both fixed number of integer digits and decimal digits. How can I do this with Boost.Format. #include<boost/format.hpp> #include<iostream> int main(){ int i = 2; std::cout << boost::format("%04i") % i << std::endl; //prints 0002, ok! double d = 3.1415; std::cout<< boost::… [View More]

3 3

Re: [Boost-users] [serialization] boost::serialization adds huge amounts of exports to resultant Windows PE file (Robert Ramey)
by Chris Yuen 01 Oct '10

01 Oct '10

Robert Ramey wrote: > Are you sure you're building in release mode? Yes of course. Is that expected to make a difference? Reading from `force_include.hpp`, even Release mode wouldn't escape from this (see below) I dug into the problem a little bit more. I replaced `force_include.hpp` with the following two lines and then actually recompiled boost::serialization #define BOOST_DLLEXPORT #define BOOST_USED The code bloat is gone (as shown by `dumpbin /exports`, yes, actually … [View More]

2 1

invalid itialization of reference of type boost::thread&& from expression of thread 'boost::thread'
by Carla Strembicke 30 Sep '10

30 Sep '10

Hello I am having a problem compiling with boost thread. I have installed gcc 4.5.1 on my linux platform recently. I am using boost libraries 1.42. I do understand that this library has not been tested with this compiler. My question is, I see that 1.44 version of boost has been tested with gcc 4.5.1 on redhat. Is this issue, that I provide a link to, resolved in 1.44 or will I still see the same problem? http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43915 regards carla CONFIDENTIAL … [View More]

2 1

Making boost::any play nice in function overloads
by dakatz＠akamai.com 30 Sep '10

30 Sep '10

Hi - I've got a method which should take a variety of types and with the exception of taking a function pointer it shouldn't care about which types it's getting, so I thought that a boost::any would be a nice way to achieve this. Here's a simplified prototype: ------------------------------------------------------------------------ class Table { public: // Base case void doSomething(const boost::any& input); // Special overload for function pointers for some special reason. … [View More] // // Has logic to interpret NULL pointer as integer 0 and pass to // "base" boost::any case. void doSomething(void (*f)(void)); }; ------------------------------------------------------------------------ When I tried to call doSomething with a string literal argument (i.e. table.doSomething("Hello")), it of course failed since boost:any can't be initialized with an array. Okay - no problem. Another overload should do the trick, right? So I added an overload like this: ------------------------------------------------------------------------ class Table { public: void doSomething(const boost::any& input); // Supposed to take a const char*, convert it to a string, and // pass off to boost::any case. void doSomething(const std::string& input); void doSomething(void (*f)(void)); }; ------------------------------------------------------------------------ on the theory that a const char* would convert to a std::string. I couldn't add an overload for const char* directly since that would conflict with the overload for the function pointer (i.e. table.doSomething(0) would be ambiguous between the function pointer and the const char*). Unfortunately, this didn't work. When I called this with "Hello.": ------------------------------------------------------------------------ $ g++ -W -Wall -Werror -ansi any_overload_problem.cpp any_overload_problem.cpp: In function 'int main()': any_overload_problem.cpp:32: error: call of overloaded 'doSomething(const char [7])' is ambiguous any_overload_problem.cpp:8: note: candidates are: void Table::doSomething(const boost::any&) any_overload_problem.cpp:19: note: void Table::doSomething(const std::string&) ------------------------------------------------------------------------ I admit that I didn't foresee this, although I suppose I should have. Even though a boost:any can't be initialized with a const char*, that signature is still participating in the overload resolution. So does anyone have any suggestions for how to deal with this sort of thing? Is there a good way to get the boost::any conversions to match "less well" than something like the std::string conversion? Or am I just way off-base in trying to use boost::any here at all? Thanks! Dan Katz [View Less]

2 2

[asio] promiscuous mode?
by Ryan McConnehey 30 Sep '10

30 Sep '10

If winpcap or some such library is installed on a machine is it possible to have asio read from the Ethernet card in promiscuous mode? Ryan

3 3

[iostreams] tellg not supported on devices / filters that aren't seekable
by Sebastian Karlsson 30 Sep '10

30 Sep '10

I find it inconvenient that tellg isn't supported on filters / devices that isn't seekable, since tellg doesn't really seek but simply reports the current read head position. Here follows some example code that will throw due to this: #include <ostream> #include "boost/iostreams/categories.hpp" #include "boost/iostreams/filtering_stream.hpp" #include "boost/iostreams/filter/zlib.hpp" int main() { boost::iostreams::filtering_stream< boost::iostreams::input > strm( ( boost::… [View More]

1 0