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spirit::qi and Phoenix placeholder
by Olivier Austina 04 Oct '13

04 Oct '13

I am reading Spirit tutorial, at http://www.boost.org/doc/libs/1_54_0/libs/spirit/doc/html/spirit/qi/tutoria…. I am new to boost. It is not clear to me what the placeholder are and when using them. This is some of them: *Spirit.Qi specific Phoenix placeholders* _1, _2... , _N Nth attribute of p _val The enclosing rule's synthesized attribute. _r1, _r2... , _rN The enclosing rule's Nth inherited attribute. _a, _b... , _j The enclosing rule's local variables (_a refers to the first). _pass Assign false to _pass to force a parser failure. For example in this code : template <typename Iterator>bool parse_numbers(Iterator first, Iterator last, std::vector<double>& v){ using qi::double_; using qi::phrase_parse; using qi::_1; using ascii::space; using phoenix::push_back; using phoenix::ref; bool r = phrase_parse(first, last, // Begin grammar ( *double_[push_back(ref(v), _1)] >> *(',' >> double_[push_back(ref(v), _1)])* ) , // End grammar space); if (first != last) // fail if we did not get a full match return false; return r;} why using _1, (using qi::_1) instead of _2 (using qi::_2). Which parts of boost should I read before reading spirit. Any suggestion is welcome. Thank you. Regards Olivier

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Re: [Boost-users] 1.55.0 beta 1 release candidates available for testing
by Craig Henderson 04 Oct '13

04 Oct '13

On 4 October 2013 07:13, Ovanes Markarian <om_boost(a)keywallet.com> wrote: > Marshall, > > is there any link to what has been added/fixed in the new release. Would > be great to find it out before downloading the software. > See http://www.boost.org/users/history/version_1_55_0.html

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Re: [Boost-users] Boost.Coroutine + objects
by Van Pers 03 Oct '13

03 Oct '13

Nathan Ridge wrote: > You need to refer to member functions as '&Abc::first' rather than > just 'first', and you need to bind the implicit object parameter > to something (likekely 'this'): > bind(&Abc::first, this, _1) > Regards, > Nate Thank you Nathan, this works for me. Regards, Van

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[Exception] Duplicate symbol error when using errinfo_api_function in static library
by Georg Leidinger 03 Oct '13

03 Oct '13

Dear readers, I encountered a problem in my project when using *Boost.Exception* with the predefined types errinfo_xyz in a library project. I have two classes ClassA and ClassB in my library which both throw a boost::exception with errinfo_api_function type in their implementation file (.cpp) These both classes are compiled into a static library with the C/C++-Flags -fvisibility=hidden. Then I have a main.cpp which creates an instance of ClassA and ClassB and links to the library which contains ClassA.o and ClassB.o. When I compile the main.cpp I get the linker error duplicate symbol for the errinfo_api_function object in ClassA.o and ClassB.o. If I remove the visibility=hidden flag, it links without problems. I am not an expert on the compiler flags, but I saw that many libraries use the visibility=hidden flag so I think it would be good, if my lib could also use it. For a better description I will show the sources for my project: ClassA.h ------------------------------------------------------------------------------------------------- #pragma once #include <boost/exception/all.hpp> struct my_errorA : virtual std::exception, virtual boost::exception {}; class ClassA { public: ClassA() {}; virtual ~ClassA() {}; virtual void doSomething(); }; ClassA.cpp ------------------------------------------------------------------------------------------------- #include "ClassA.h" void ClassA::doSomething() { BOOST_THROW_EXCEPTION( my_errorA() << boost::errinfo_api_function("doSomething") ); } ClassB.h ------------------------------------------------------------------------------------------------- #pragma once #include <boost/exception/all.hpp> struct my_errorB : virtual std::exception, virtual boost::exception {}; class ClassB { public: ClassB() {}; virtual ~ ClassB() {}; virtual void doSomething(); }; ClassB.cpp ------------------------------------------------------------------------------------------------- #include "ClassB.h" void ClassB::doSomething() { BOOST_THROW_EXCEPTION( my_errorB() << boost::errinfo_api_function("doSomething") ); } main.cpp ------------------------------------------------------------------------------------------------- #include "ClassA.h" #include "ClassB.h" int main(int argc, const char * argv[]) { ClassA A; ClassB B; return 0; } The Linker output: ----------------------------------------------------------------------------------------------------------------- *Ld /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug/ExceptionTest normal i386 cd /Users/georg/work/ExceptionTest setenv MACOSX_DEPLOYMENT_TARGET 10.8 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -L/Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug -F/Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug -filelist /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Intermediates/ExceptionTest.build/Debug/ExceptionTest.build/Objects-normal/i386/ExceptionTest.LinkFileList -mmacosx-version-min=10.8 /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug/libExceptionLib.a -o /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug/ExceptionTest duplicate symbol __ZTIPN5boost21errinfo_api_function_E in: /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug/libExceptionLib.a(ClassA.o) /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug/libExceptionLib.a(ClassB.o) duplicate symbol __ZTSPN5boost21errinfo_api_function_E in: /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug/libExceptionLib.a(ClassA.o) /Users/georg/Library/Developer/Xcode/DerivedData/ExceptionTest-dcnvciwqbwqvciaokkjjaqchftll/Build/Products/Debug/libExceptionLib.a(ClassB.o) ld: 2 duplicate symbols for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation)* ----------------------------------------------------------------------------------------------------------------- I hope I described the problem well enough and I hope someone can explain what the problem is? Thank a lot and best regards Georg

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[parameter] named template parameters
by ilya shlyakhter 03 Oct '13

03 Oct '13

Some questions about the Boost.Parameter library: - seems like it hasn't been updated in some time -- is it still supported? - when specifying type constraints for named template parameters, is it possible to specify constraints among several type parameters (the way graph_type is used in section 2.1.5.6.1 of the documentation) - are there any issues in the interaction of Boost.Parameter and template specialization, i.e. how do I specialize the template on the values of some of the named parameters? Thanks, ilya

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[serialization] map of shared_ptr
by Sebastian Messerschmidt 03 Oct '13

03 Oct '13

Hi folks, I stumbled over a strange behavior in the serialization. Basically I want to write multiple entries into the same archive. The data is a map of an index and some shared_ptr for the values. Writing/reading are working but produce wrong results with the provided minimal example. I'm using boost 1.49 under Visual Studio 2010 64bit. I've also tried the code without the use of shared_ptr and without a map. Both version are working fine. The combination however fails. What am I doing wrong? cheers Sebastian <snip> #include <map> #include <fstream> #include <boost/shared_ptr.hpp> #include <boost/serialization/access.hpp> #include <boost/serialization/map.hpp> #include <boost/serialization/shared_ptr.hpp> #include <boost/archive/binary_iarchive.hpp> #include <boost/archive/binary_oarchive.hpp> struct Test { template <class Archive> void serialize(Archive& ar, const unsigned int /*version*/) { ar & c; } Test() :c(0) {} int c; }; typedef std::map<int, boost::shared_ptr<Test>> TestMap; void save(const TestMap& m) { static std::ofstream os("d:/tmp/somedata.bin", std::ios_base::binary); static boost::archive::binary_oarchive oa(os); oa << m; } void load(TestMap& m) { static std::ifstream is("d:/tmp/somedata.bin", std::ios_base::binary); static boost::archive::binary_iarchive ia(is); ia >> m; } int main(int argc, char** argv) { TestMap t; t.insert(std::make_pair(1, new Test())); //save #if 1 for (unsigned int i = 0; i< 100; ++i) { t[1]->c++; save(t); std::cout << t[1]->c << std::endl; } #else //load //This fails, c will always be the first serialized value for (unsigned int i = 0; i< 100; ++i) { load(t); std::cout << t[1]->c << std::endl; } #endif } </snip>

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calc2_ast.cpp
by Olivier Austina 03 Oct '13

03 Oct '13

Hi, this is a basic question (I am sorry). I am try to undestand the calc2_ast.cpp example at http://www.boost.org/doc/libs/1_41_0/libs/spirit/example/qi/calc2_ast.cpp I think the instruction expression_ast() : expr(nil()){} is an inheritance. Where can I find the definition of expr()? This is the code struct expression_ast { typedef boost::variant< nil // can't happen! , unsigned int , boost::recursive_wrapper<expression_ast> , boost::recursive_wrapper<binary_op> , boost::recursive_wrapper<unary_op> > type; * expression_ast() : expr(nil()){};* template <typename Expr> expression_ast(Expr const& expr) : expr(expr) {} expression_ast& operator+=(expression_ast const& rhs); expression_ast& operator-=(expression_ast const& rhs); expression_ast& operator*=(expression_ast const& rhs); expression_ast& operator/=(expression_ast const& rhs); type expr; }; //expression_ast bbb; struct binary_op { binary_op( char op , expression_ast const& left , expression_ast const& right) : op(op), left(left), right(right) {} char op; expression_ast left; expression_ast right; }; Thank you. Regards Olivier

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[Program_Options] Why multiple_occurrences::get_option_name() and validation_error::what() disappear since 1.50 version?
by Romain LEGUAY 03 Oct '13

03 Oct '13

Hello everyone, I make a library using Boost Program Options (version 1.44). I have some "Undefined symbols" (for multiple_occurrences::get_option_name() and validation_error::what()) when I try to use my library with Boost version 1.5x. Does anyone know why those two methods disappear? Thank you! -- *Romain LEGUAY* Ingénieur Jeune Diplômé Projet Realopt A33-IMB Bureau 270 Tel: +33 5 40 00 21 35

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Valgrind errors with ASIO
by Bo Jensen 03 Oct '13

03 Oct '13

Hi, I have build a job queue with a combination io_service, io_service::work, packaged_task and a thread group. I am seeing randomly either segfaults or strange asserts in pthread or even malloc, which suggest to me memory is being corrupted somehow. The problem is it does not show in debug mode running under valgrind, but if I run valgrind on the non debug version I get valgrind errors in pthreads called from asio. I try to downgrade my boost lib from 1.54 to 1.52, but still the same. I am completely stuck on this, does anyone have some hints to possible causes ? I can not show the complete source since it's not possible to isolate, but here's the types I have : std::vector<boost::shared_ptr<ExceptionTransfer> > io_error_; std::vector<boost::shared_future<BasisSelectRet> > io_future_; boost::asio::io_service io_service_threads_; boost::shared_ptr<boost::asio::io_service::work> io_work_; boost::thread_group io_threads_; I am calling it ala like this : /* Create new tasks */ basistasks_[workerid] = boost::make_shared<boost::packaged_task<BasisSelectRet> >(boost::bind(&CallBasisSelection,&worker,boost::ref(io_error_[workerid]))); /* Make threads */ io_service_threads_.post(boost::bind(&boost::packaged_task<BasisSelectRet>::operator(),basistasks_[workerid])); io_future_[workerid] = basistasks_[workerid]->get_future().share(); The called function is defined as follows (BasisSelectRet is just a enum) : /* Helper function */ BasisSelectRet CallBasisSelection(TreeWorker *worker, boost::shared_ptr<ExceptionTransfer> &error) { BasisSelectRet ret = BasisSelectRetOk; try { worker->BasisSelection(); } catch( ... ) { error->SetException(boost::current_exception()); } return ret; } I can wait for a job to finish like this : boost::wait_for_any(io_future_.begin(),io_future_.end()); Here's the val grind errors : ==3723== by 0xB5D77BF: ??? ==3723== ==3723== Thread 5: ==3723== Invalid read of size 4 ==3723== at 0x6506C01: __pthread_mutex_cond_lock (pthread_mutex_lock.c:50) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c334 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C36: __pthread_mutex_cond_lock (pthread_mutex_lock.c:61) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C40: __pthread_mutex_cond_lock (pthread_mutex_lock.c:62) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c330 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x6506C4C: __pthread_mutex_cond_lock (pthread_mutex_lock.c:125) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c330 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 1 ==3723== at 0x5F27B2B: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0xDD41297: ??? ==3723== Address 0x670c360 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6500311: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:37) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c334 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x650032F: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:46) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c330 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6500360: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:49) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c338 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6500340: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:52) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x6503C55: __lll_unlock_wake (lowlevellock.S:374) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Syscall param futex(futex) points to unaddressable byte(s) ==3723== at 0x6503C7C: __lll_unlock_wake (lowlevellock.S:380) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== <Log> 20 0 20 -3.05198e+02 - - - 1127 31.18 ==3723== Thread 3: ==3723== Invalid read of size 8 ==3723== at 0x4E0ED3F: __intel_ssse3_memcpy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x7439DF7: ??? ==3723== Address 0x66f3b58 is 112 bytes inside a block of size 116 alloc'd ==3723== at 0x4024F20: malloc (vg_replace_malloc.c:236) ==3723== by 0x582A7B6: _ZN3slm6Matrix16ResizeVecsInternEiPKib. (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x7439DF7: ??? ==3723== ==3723== Invalid read of size 8 ==3723== at 0x4E0ED6F: __intel_ssse3_memcpy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x7439DF7: ??? ==3723== Address 0x66f5d48 is 136 bytes inside a block of size 140 alloc'd ==3723== at 0x4024F20: malloc (vg_replace_malloc.c:236) ==3723== by 0x582A7B6: _ZN3slm6Matrix16ResizeVecsInternEiPKib. (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x7439DF7: ??? ==3723== <Log> 20 0 20 -3.05198e+02 -2.68521e+02* 12.0 1 1139 36.72 ==3723== Thread 4: ==3723== Invalid read of size 4 ==3723== at 0x6506C01: __pthread_mutex_cond_lock (pthread_mutex_lock.c:50) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffac is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C36: __pthread_mutex_cond_lock (pthread_mutex_lock.c:61) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffa0 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C40: __pthread_mutex_cond_lock (pthread_mutex_lock.c:62) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffa8 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x6506C4C: __pthread_mutex_cond_lock (pthread_mutex_lock.c:125) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffa8 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Thread 5: ==3723== Invalid read of size 1 ==3723== at 0x5F27B2B: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0xCD40297: ??? ==3723== Address 0xb93ffd8 is not stack'd, malloc'd or (recently) free'd ==3723==

2 7

[Spirit/qi] parsing order, exact matches
by beet 02 Oct '13

02 Oct '13

Dear Boost-User list, I have modified the calc6-example from the Spirit docs, so that it uses double variables rather than integers. I have then added a number of mathematical functions. The rule for the unary functions (reduced to just sin and sinh here for readability) is: unary_function_rule_ = (string_("sin") > '(' > expression_rule_ > ')') | (string_("sinh") > '(' > expression_rule_ > ')') ; I would have expected the "sin" part of the rule to trigger only when there is a "sin" string, which is immediately followed by a '('. This works o.k. when the function in question really contains a sin(). However, when I pass a "sinh()", I get an error message that it failed parsing a "h(", so the "sin" part of the message has triggered. Changing the order of sinh and sin in the rule cures the problem. Still I would like to understand how I can make the sin-part of the rule only trigger for expressions like "sin(3.14)", but not for e.g. "sinh(2)". Thanks and best regards, Beet

2 1

[Geometry] Triangulation?
by David Hynd 02 Oct '13

02 Oct '13

Hi, I want to use the boolean/CSG operations of the Geometry library of Boost, but I need the resultant polygons to be triangles (it's 3D data, by the way). Is there a way to achieve this with Boost? Or if not, what recommendations would you have for me? This is my first ever mailing list post, so forgive me if I didn't get it right :) Thanks, David

2 2

[Iostreams] Zlib compression sometimes creates corrupt data on OSX
by Michael Jung 02 Oct '13

02 Oct '13

Hello, I’m having the following problem with my program: If I save data on OSX using a boost::iostreams::filtering_ostream with a boost::iostreams::zlib_compressor() the resulting file is sometimes corrupted. The following example code reproduces the problem: #include <fstream> #include <iostream> #include <vector> #include <boost/iostreams/filtering_stream.hpp> #include <boost/iostreams/filter/zlib.hpp> int main(int argc, char** argv) { if (argc != 2) return 1; std::ifstream file(argv[1]); if (file) { file.seekg(0, std::ios::end); std::streampos length = file.tellg(); file.seekg(0, std::ios::beg); std::vector<char> buffer1(length); std::vector<char> buffer2(length); file.read(&buffer1[0], length); { std::ofstream ofs("test.dat", std::ios_base::binary); boost::iostreams::filtering_ostream fos; fos.push(boost::iostreams::zlib_compressor()); fos.push(ofs); fos.write(&buffer1[0], length); } { std::ifstream ifs("test.dat", std::ios_base::binary); boost::iostreams::filtering_istream fis; fis.push(boost::iostreams::zlib_decompressor()); fis.push(ifs); fis.read(&buffer2[0], length); } std::cout << (buffer1 == buffer2 ? "equal" : "not equal") << std::endl; } } This piece of code reads a file that is specified as command line argument, compresses and saves it to “test.dat”, reloads and decompresses it and then compares the result with the content of the original file. Using it with two files linked below leads to the following output: $ ./bugtest example1_working.txt equal $ ./bugtest example1_not_working.txt not equal i.e. in the second case the compression creates corrupt data. I verified that the problem is in the compression part by trying to decompress test.dat on Linux using zlib-flate which gives an error (incorrect data check). If I compress the file manually on Linux using zlib-flate and decompress it on OSX with code similar to the above, the input file is reproduced correctly. The two files used above are save files of my software. You can download them from: http://neptun.iup.uni-heidelberg.de/files/example1_working.txt http://neptun.iup.uni-heidelberg.de/files/example1_not_working.txt Another pair of files with the problem is: http://neptun.iup.uni-heidelberg.de/files/example2_working.txt http://neptun.iup.uni-heidelberg.de/files/example2_not_working.txt I haven’t been able to find out what is special about the ones causing the problem, so I just put them up as they are. The files are quite similar, but show a few differences on every (or almost every?) line. If needed, I can create other pairs of files showing the same problem. I compiled the above code in the following way: c++ -stdlib=libc++ -std=c++11 test.cpp -I /Users/michael/projects/boost-svn-build/include/ -c c++ -stdlib=libc++ -std=c++11 -o test test.o /Users/michael/projects/boost-svn-build/lib/libboost_iostreams.a -lz The boost libraries were built from svn as follows: ./bootstrap.sh --prefix=../boost-svn-build --with-libraries=iostreams --with-toolset=clang ./b2 -j6 link=static toolset=clang cxxflags="-std=c++11 -stdlib=libc++" linkflags="-stdlib=libc++" install Clang version is: “Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn)” I am running OS X 10.8.2. The same files are compressed correctly with the above code on Linux, compiled with GCC 4.6.3. I think this problem might be a bug in boost or maybe also in the llvm libraries (c.f. https://svn.boost.org/trac/boost/ticket/8150 , which looks like a similar problem). Compiling boost with zlib 1.2.8 instead of using zlib 1.2.5, which is shipped with OSX, leads to the same problem. Both Boost 1.54.0 and the svn version are affected. Should I create a ticket for this on the bug tracker? Or is this just me using the library incorrectly?? Best regards, Michael -- Michael Jung michaeljung(a)mailhaven.com

2 1

virtual memory exhausted: cannot allocate memory
by rahul baruah 02 Oct '13

02 Oct '13

Has anyone found solution to the problem. When i include many statemachine, i get this error while compile. Urgently need help Regards Rahul

1 0

Boost.Coroutine + objects
by Van Pers 02 Oct '13

02 Oct '13

Hello guys, I am using Boost Coroutines but I would like to use them in a Objected-Oriented way. So, I tried to rewrite parallel.cpp (boost/libs/coroutine/example) using the example functions like class methods, but it did not work. This is my code, anybody can help me? My code: typedef boost::coroutines::coroutine< void() > coroutine_t; class Abc{ public: void first( coroutine_t::caller_type & self) { std::cout << "started first! "; for ( int i = 0; i < 10; ++i) { self(); std::cout << "a" << i; } } void second( coroutine_t::caller_type & self) { std::cout << "started second! "; for ( int i = 0; i < 10; ++i) { self(); std::cout << "b" << i; } } void third(){ coroutine_t c1( boost::bind( first, _1) ); coroutine_t c2( boost::bind( second, _1) ); while ( c1 && c2) { c1(); std::cout << " "; c2(); std::cout << " "; } } }; int main( int argc, char * argv[]) { Abc* myabc = new Abc(); myabc->third(); std::cout << "\nDone" << std::endl; return EXIT_SUCCESS; } Thank you, Van

2 1

returning range adaptor generator
by Nick Stokes 02 Oct '13

02 Oct '13

What should be the return type for a function that returns an adapted range? E.g. template<class Range> xxx getIndirected( const Range& r ) { return r | boost::adaptors::indirected; } The use case being, providing a API with these little useful helpers without forcing the user to know about Boost.Range at all. Like so: #include <myapi.hpp> #include <boost/foreach.hpp> LegacyPointerContainers f; // contains Foo pointers BOOST_FOREACH( Foo& f, TraverseFoo( f ) ) { } /// where in myapi.hpp xxx TraverseFoo( LegacyPointerContainers& f ) { return getIndirected( makeRange(f) ) ; } PS: This is all C++03. No autos. Thanks Nick

3 3

BGL: write_graphviz_dp taking in count values of dynamic_properties
by Pablo Madoery 30 Sep '13

30 Sep '13

Hi, I have the following code that print a graph taking in count values of dynamic_properties: #include<iostream> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/graphviz.hpp> using namespace std; using namespace boost; struct VertexInfo { int id; }; struct EdgeInfo { double weight; bool enable; }; typedef adjacency_list<listS, vecS, bidirectionalS, VertexInfo, EdgeInfo> Graph; int main() { //////////////////////////////////////////////////////////////////////////////////////////// Graph graph; Graph::vertex_descriptor a = add_vertex(graph); Graph::vertex_descriptor b = add_vertex(graph); Graph::vertex_descriptor c = add_vertex(graph); Graph::vertex_descriptor d = add_vertex(graph); Graph::edge_descriptor e1 = (add_edge(a, b, graph)).first; Graph::edge_descriptor e2 = (add_edge(a, b, graph)).first; Graph::edge_descriptor e3 = (add_edge(b, c, graph)).first; Graph::edge_descriptor e4 = (add_edge(c, a, graph)).first; Graph::edge_descriptor e5 = (add_edge(c, a, graph)).first; Graph::edge_descriptor e6 = (add_edge(c, d, graph)).first; graph[e1].weight = 5; graph[e2].weight = 10; graph[e3].weight = 6; graph[e4].weight = 14; graph[e5].weight = 2; graph[e6].weight = 3; graph[e1].enable = true; graph[e2].enable = false; graph[e3].enable = true; graph[e4].enable = false; graph[e5].enable = true; graph[e6].enable = false; ofstream ofs("graph.dot"); dynamic_properties dp; dp.property("node_id", get(vertex_index, graph)); dp.property("label", get(&EdgeInfo::weight, graph)); dp.property("taillabel", get(&EdgeInfo::enable, graph)); write_graphviz_dp(ofs, graph, dp); cout << "fin" << endl; return 0; } /////////////////////////////////////////////////////////////////////////////////// there is a property called "enable" in the edges that I print in the tails of the arrows. But what i really want is that when enable = false the style of the arrow be different ("invis" for example). How can i do that? Thanks!

2 2

Tree traversal in boost spirit
by Olivier Austina 30 Sep '13

30 Sep '13

Hi, I would like to traverse a parsed tree. The parsing is fine. I am using this tutorial : http://en.highscore.de/cpp/boost/parser.html This is the instruction used for parsing : boost::spirit::parse_info<> pi = boost::spirit::parse(data.c_str(), g, boost::spirit::space_p); I would like to traverse the parsed tree like classical tree (Pre-order, In-order, Post-order) to have data in a given order. Any suggestion will be appreciated. Thank you. Regards Olivier

2 2

[Graph] Stable topological_sort? And topological_sort woes in general.
by Dominique Devienne 30 Sep '13

30 Sep '13

I'm sorting a set of SQL tables with foreign-key constraints. I'm currently using BGL's topological_sort for that, but struggled quite a bit because: * I didn't manage to adapt my own data-structure, so ended-up sorting indices to an array of my entries, and generated the edges as indice pairs on in this array (like the doc example). * Discovered via unit testing topological_sort didn't like vertices with no associated edges (a "free standing" table, with no relationships), so I'm "manually" removing those. * Discovered via unit testing topological_sort didn't like "duplicate" edges (a table with several columns referencing the same parent table), so I'm also manually removing those too. I confess to not trying to fully understand the BGL, nor to have read the book. Given what I was trying to do, as outlined above, was using topological_sort really the best tool for the job? What are the alternatives, if any? For my own education, why "singleton" vertices and duplicate edges make topological_sort break? But what brings me here today is to ask about a "stable" topo-sort. When I have several vertices which are all "unrelated" and thus sort at the same "level", topological_sort does not preserve the relative order of those "sibling" vertices, and I'd like something fully deterministic that I can count on. What are my options? Does BGL provide something like this? As a concrete example, given tables A, B, C, with A depending on both B, C, topological_sort gives me the C, B, A order (or adding the "levels" (C, B), A), while I'd like B, C, A, i.e. preserving the relative order of B, C. Thanks for any insight. --DD PS: What about getting a topo-sort, but which also gives you the "levels", so that you can schedule those independent tasks (on each level) in parallel for example? Does BGL provide something like this? I've done it in the past with the help of the Sedgewick book, but I see a single topo-sort in BGL.

2 2

[Serialization] How do I make boost::serialization work with std::shared_ptr?
by Arman Schwarz 30 Sep '13

30 Sep '13

Hi everyone, this is my first post so I apologies if I got some of the housekeeping wrong. I did my best. I also realise that this is likely to be a common question but all the responses I could find on Stackoverflow (among others) were related to older implementations of boost. My understanding is that Boost 1.54 is supposed to support `std::shared_ptr`. To illustrate the issue I am having, suppose we want to serialize a class containing a vector of shared pointers, along with a static `load` function that will build the class from a file and a `save` function that will store the instance to a file, and suppose that we can't just use the `serialize` member function for whatever reason (this particular example doesn't really illustrate such a case but in my code I can't use the `serialize` member function so this example doesn't use it either): #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/shared_ptr.hpp> #include <fstream> #include <memory> #include <vector> class A { public: std::vector<std::shared_ptr<int>> v; void A::Save(char * const filename); static A * const Load(char * const filename); ////////////////////////////////// // Boost Serialization: // private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int file_version) {} }; // save the world to a file: void A::Save(char * const filename) { // create and open a character archive for output std::ofstream ofs(filename); // save data to archive { boost::archive::text_oarchive oa(ofs); // write the pointer to file oa << this; } } // load world from file A * const A::Load(char * const filename) { A * a; // create and open an archive for input std::ifstream ifs(filename); boost::archive::text_iarchive ia(ifs); // read class pointer from archive ia >> a; return a; } namespace boost { namespace serialization { template<class Archive> inline void save_construct_data( Archive & ar, A const * t, unsigned const int file_version ) { ar << t->v; } template<class Archive> inline void load_construct_data( Archive & ar, A * t, const unsigned int file_version ) { ar >> t->v; } } } int main() { } Why doesn't this code compile? What am I doing wrong here? The error message states that 'serialize' is not a member of 'shared_ptr'. Why am I am getting this message?

5 6

Re: [Boost-users] Running Regular expression (RE) over a list, array or map
by Olivier Austina 28 Sep '13

28 Sep '13

Hi, I try to use pattern matching approach for a dataset with multilevel tags. Suppose we have 2 sets of features: F and H with the following tags F={f0, f1, f2, f3} and H={h0, h1, h2, h3, h4} to describe a set of elements E={e1, e2, e3.....en}. We have in a table a sequence of E elements describe as following: E e1 e2 e3 e4 e5 e6 e7 e8 ...........en F *f3 f0 f0 f0* f2 *f3 f0 * f2 f0 H h4 h0 h4 *h1* h0 h2 *h3* h2 h1 The order in which e1, e2 e3...... appear is important as words in a sentence. Suppose we have the following RE with f3 and f0 as following: f3f0+ . It will match the corresponding sequence e1, e2, e3, e4 and e6, e7 in E. Now we want to add additional constraint as the last f0 should map a h1 in H. In this case the final result will be only the sequence e1, e2, e3, e4 because in the last sequence e6, e7 the f0 map h3 in H.The final result is always E sequences but the RE and constraint can be based on E, F or H. May be it becomes a bit clear. Thank for your help. Regards Olivier 2013/9/27 Anthony Foiani <tkil(a)scrye.com> > Olivier, greetings -- > > Olivier Austina <olivier.austina(a)gmail.com> writes: > > > I am wondering if it is possible to run directly regular expression > > over a list and getting the indexes (begging and end) of the > > match. For example, I have a list of strings and a regular > > expression and I want to know which part of the list matches the RE > > and get the corresponding indexes in the list. > > It looks like you got some other suggestions, but if they're not what > you're looking for, you might want to clarify your request. > > In particular, it's not clear to me whether you want to match the RE > against each individual item (which can be parallelized, but the > result is a membership bitmap or subset, not a range), or if you want > to match the RE against the concatenated value, or the largest span of > continuous values (which are the requests that make the most sense if > you want a starting and ending index). > > Some sample code would probably clarify things. > > E.g., given: > > typedef std::vector< std::string > string_vec; > const string_vec sv{ "foo", "bar", "baz" }; > > And you wanted to match: > > const boost::regex re{ "ba.*" }; > > What answer do you want to see? > > * The membership bitmap would be something like: [ 0, 1, 1 ] > > * The subset would be: { "bar", "baz" } > (This is basically a "grep" operator.) > > * The "range" answer would be sv.begin()+1, sv.begin()+3 (since > "barbaz" matches). > > * The other "range" answer would be the same, but because "bar" > matches, and "baz" matches, so the range represents the (longest?) > set of elements that individually match the given regex. This > ends up being something of a meta-regex, or if you prefer, the > result of searching the concatenated string for instances of > "(?:re)+". > > Or is there some other interpretation that you're trying to get at? > > Happy hacking, > Tony > > p.s. Heh. Guess who just finished a few interviews where "spot the > under-specified problem" was important... > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

2 2

Re: [Boost-users] [geometry] within(Poly, Poly)
by Barend Gehrels 27 Sep '13

27 Sep '13

> Barend Gehrels wrote: >> On 26-9-2013 23:01, Adam Wulkiewicz wrote: >>> Barend Gehrels wrote: >>> >>>> >>>>> >>>>> So must I handle each special case, analysing the exterior rings, polygons inside holes, holes inside holes, etc? Or do you see some other, clever way of doing it? >>>> >>>> Yes, all turn information should be totally independent on segments being exterior or interior (iff the orientation is correct w.r.t. the compile-time specified orientation) >>> >>> Ok so the algorithm complicates, correct me if I'm wrong: >>> >>> If P1 exterior isn't inside P2 exterior >>> return NOT_WITHIN >>> If P2 has holes >>> If P1 exterior is disjoint or only touches holes of P2 >>> return WITHIN >>> If holes of P2 which intersects P1 are also inside P1 holes >>> return WITHIN >>> else >>> return NOT_WITHIN >> >> You are right - if there are holes, this must be checked. See also the unit-tests for union.cpp (with TEST_WITH_SVG): union_wrapped, union_winded, union_within_holes_disjoint, union_intersect_holes_disjoint, ... >> >> For touches this is done in "rings_containing", this is probably possible here too. That makes it not really complex and because turns are OK for all exterior/interior combinations, the holes are not a big issue. >> >> For union/intersection, and also for dissolve in intersections, this is done in "select_rings" (the dissolve.hpp contains a simple version that might do ; the others are in overlay.hpp) They are followed by "assign_parents" but that is probably not necessary for this algorithm. >> >> >> >>> >>> And holes should be reversed before checking because they have different orientation than the exterior ring. >> >> No, we assume correct polygons. And all turn info is correct for holes. We don't have to check (besides for things located inside each other without intersections). >> I don't know if you mean this, but for information: we have a specific type for polygons where order is dynamic (both allowed: order_undetermined) but that is not yet implemented anywhere. >> > > Ok now I'm checking special cases and I think that my previous assumtions wasn't fully ok. Correct me if I'm wrong. > > Of course method 'i' and operation 'xx' is automatic fail. ? xx fails but i is ok for turns including on holes? > > Only if we have operation 'u' we must worry about > 'uu' - touches from the outside > 'ux' - is outside > 'ui' - the curve potentially goes to the other side of the second curve. ? yes but this all means failure for all turns including holes? (except ui, sometimes) > > All other combination with operations 'i' and 'c|c' are ok, also t+cc, m+cc? > > So additionally we should check if points of segments for which u|i was generated are inside the polygon. This would be ok for '[not] within *.svg', '(2-5).svg' but would fail for '1.svg'. However in those cases there would be uu there so it might be used as well. So I guess if there are some 'u|i' operations we should check if all (or some) points are inside. If there is some 'u|u' we should check if on the same point there are no other intersections to detect cases like 'ok_uu.svg'. > > Of course if there are no intersections, only one point may be tested if it's inside. > > What do you think? > sorry I don't understand it. As I said before, holes are processed correctly automatically for any turn. You don't have to process any turn special for any hole. So i is intersection, this is Ok. But u is union, then the within should fail. The interior is really the inside of a polygon, not the hole. That is outside.... Or maybe I did not understand your mail. I never handle holes separately in any turn in the whole traverse process. As long as the direction is ccw (for a cw polygon), it all goes ok. The interior is always on the right side. Of course, as we discussed before, if a hole does not have any turnpoints, we should check it separately and differently, not with turn info Regards, Barend Sent from iPad. Barend Gehrels www.barendgehrels

1 0

[Container] Using container of BOOST_MOVABLE_BUT_NOT_COPYABLE type with std algorithm
by kwanti 27 Sep '13

27 Sep '13

I try to use std::remove_if with boost.container of BOOST_MOVABLE_BUT_NOT_COPYABLE type in c++98 compiler. The compilation failed because std::remove_if in c++98 is not implemented with boost.move emulation. Is there any implementation of remove_if in boost that is implemented with boost.move? I found one remove_if algorithm in boost.range library but I can't find in the documentation whether it is using boost.move emulation. -- View this message in context: http://boost.2283326.n4.nabble.com/Container-Using-container-of-BOOST-MOVAB… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

Running Regular expression (RE) over a list, array or map
by Olivier Austina 27 Sep '13

27 Sep '13

Hi, I am wondering if it is possible to run directly regular expression over a list and getting the indexes (begging and end) of the match. For example, I have a list of strings and a regular expression and I want to know which part of the list matches the RE and get the corresponding indexes in the list. Any suggestion is welcome. Thank you. Regards Olivier

4 4

Student and Internationaltickets for Meeting C++
by Jens Weller 26 Sep '13

26 Sep '13

Hello boost-community, a short update on the upcoming Meeting C++ Conference. There are 3 different discounts available - Student discount of 200 € - international guests 100 € - boost contributor* 100 / 50 € The discount works over a code, so you need to contact me, in order to be given your discount-code. The discount for boost contributors is 100 €, or additional 50 € if combined with one of the other discounts. More information on the Discounts: http://meetingcpp.com/index.php/newsreader/items/announcing-student-and-int… Meeting C++ 2013 Schedule: http://meetingcpp.com/index.php/schedule13.html General Information on the conf: http://meetingcpp.com/index.php/mcpp2013.html * you should have activly contributed to boost kind regards, Jens Weller

1 0

Linux TCP session stays ESTABLISHED when interface is removed
by Chris Verges 26 Sep '13

26 Sep '13

Hi all, I'm experiencing an odd phenomenon when using Boost ASIO 1.46.1. (I know it's older, but this was inherited.) Under normal operation, everything is fine. I can create a TCP server socket, listen, and accept as expected. If I disconnect the TCP client gracefully, everything resets as expected. However, if I physically remove the network interface -- such as yanking the USB adapter out of its socket -- the TCP session stills reports as ESTABLISHED via netstat and the application receives no read error. I'm at a bit of a loss how this is possible when the underlying OS shows that the interface no longer exists yet the socket is blocking away happily. Has anyone else experienced similar symptoms? Any advice? Thanks in advance, Chris

5 7

ASIO UDP Communication stops working when entering a thread
by Ulf Samuelsson 25 Sep '13

25 Sep '13

Have created a class to allow UDP communication using ASIO // Header class UdpClient { public: UdpClient(); void Open(string ipaddr, string port); void Send(string packet); void Close(); private: bool init; string ipAddress; string Port; udp::endpoint Endpoint; udp::socket *pSocket; udp::socket *s; }; // Part of code void UdpClient::Open(string ipaddr, string port) { ipAddress = ipaddr; Port = port; boost::asio::io_service io_service; udp::resolver resolver(io_service); udp::resolver::query query(udp::v4(), ipaddr,port); Endpoint = *resolver.resolve(query); pSocket = new udp::socket(io_service); pSocket->open(udp::v4()); pSocket->send_to(boost::asio::buffer(first.c_str(), first.size()), Endpoint); std::cout << "Opening port [" + Port + "] on " + ipAddress + "\n"; init = true; } void UdpClient::Send(string packet) { if (init) { pSocket->send_to(boost::asio::buffer(packet.c_str(), packet.size()), Endpoint); } } --------------- Another class implements more advanced communication. // Extracts extern UdpClient endpoint; void UdpDebug::WriteLine(string line) { line = "[" + Clock.Now() + "]" + line; endpoint.Send(line); }; ------------------------ In my main program i declare two global variables. UdpDebug DebugPort; UdpClient endpoint; The I init the UDP communication by calling endpoint.Open(IPAddress, UDPPort); after that I can write to the UDP enpoint by: DebugPort.WriteLine("Debug working!"); Have declared a thread: boost::thread t1(Initialize); void Initialize() { DebugPort.WriteLine("Debug working in the thread"); for (int i = 0; i < MAX; ++i) { wait(1); std::cout << "Thread 1: " << i << std::endl; } } When I do t1.join(); The thread starts printing out "Thread1: <number>" on the terminal but no UDP output is received on the other end. Any clues why this won't work? Are starting two threads, but only one of them is attempting UDP communication. If I put a wait statement inside the main program, and attempt UDP communication after the threads have executed a few seconds, this will still work. Also tried creating a new instance of UdpClient inside the thread. Opened it, and tried to send data, to no avail. Any clues? BR Ulf Samuelsson

1 1

How to solve __imp_Py_NoneStruct error in C++?
by Wenlong Wang 25 Sep '13

25 Sep '13

Hi, All I am trying to run Boost.Python in my IDE. Here is my tools: Microsoft Visual Studio 2012 Express Version (64-bit), Python 2.7 (64-bit), Boost 1.54, Windows7 64-bit. And my code is really simple. I created an empty project, and create a source.cpp as follows: #include <boost\python.hpp> #include <Python.h> using namespace std; void main() { return; } After debugging, an error pops out: "error LNK2001: unresolved external symbol __imp___Py_NoneStruct" May I know where am I wrong? Regards Wenlong Wang Risk Analyst, Capquest Group Ltd Email: wwang(a)capquest.co.uk Fleet 27, Rye Close, Fleet, GU51 2QQ. Website: http://www.capquest.co.uk/ This e-mail is intended solely for the addressee, is strictly confidential and may also be legally privileged. If you are not the addressee please do not read, print, re-transmit, store or act in reliance on it or any attachments. Instead, please email it back to the sender and then immediately permanently delete it. E-mail communications cannot be guaranteed to be secure or error free, as information could be intercepted, corrupted, amended, lost, destroyed, arrive late or incomplete, or contain viruses. We do not accept liability for any such matters or their consequences. Anyone who communicates with us by e-mail is taken to accept the risks in doing so. Opinions, conclusions and other information in this e-mail and any attachments are solely those of the author and do not represent those of Capquest Group Limited or any of its subsidiaries unless otherwise stated. Capquest Group Limited (registered number 4936030), Capquest Debt Recovery Limited (registered number 3772278), Capquest Investments Limited (registered number 5245825), Capquest Asset Management Limited (registered number 5245829) and Capquest Mortgage Servicing Limited (registered number 05821008) are all limited companies registered in England and Wales with their registered offices at Fleet 27, Rye Close, Fleet, Hampshire, GU51 2QQ. Each company is a separate and independent legal entity. None of the companies have any liability for each other's acts or omissions. Group VAT registration number 844281719. Members of the Capquest group are regulated under the Consumer Credit Act 1974 and are members of the Credit Services Association. This communication is from the company named in the sender's details above.

1 0

BGL (Boost Graph Library) MaxWeightedMatching algorithm
by Pablo Madoery 25 Sep '13

25 Sep '13

Hello, i want to use an algorithm called MaxWeightedMatching : Edmond's blossom shrinking algorithm for calculating maximum weighted matching in general graphs. I note that there is an algorithm in BGL called 1. edmonds_maximum_cardinality_matching<http://www.boost.org/doc/libs/1_54_0/libs/graph/doc/maximum_matching.html> but this is not what I want. I need to take in count the weights. I would like to know if this algorithm can be taken in count in the next version of Boost or if you can tell me some advices to implement it using BGL. The MaxWeightedMatching algorithm is already implemented in LEMON library: http://www.loco.ic.unicamp.br/~msambinelli/lemon_doc/a00537.html. Thanks for your time.

2 1

linking to boost 1.54 w/ windows and visual studio 2013 RC
by Jarrett Chisholm 25 Sep '13

25 Sep '13

Hi all I'm trying to compile my project as a shared library using scons. I'm using Windows 7, and the Visual Studio 2013 RC. In the project, I'm using boost. The project compiles fine. However, when it tries to link, I get the following: /scons: warning: No version of Visual Studio compiler found - C/C++ compilers most likely not set correctly// // //scons: Reading SConscript files ...// //Compiling Glr// //scons: Reading SConscript files ...// //Parsing Shaders into header ShaderData.h// //Done parsing Shaders into header ShaderData.h// //scons: done reading SConscript files.// //scons: Building targets ...// //Using tempfile c:\users\jarrett\appdata\local\temp\tmpecwym3.lnk for command line:// //link /nologo /dll /out:build\glr.dll /implib:build\glr.lib /LIBPATH:build /LIBPATH:src /LIBPATH:C:\Users\Jarrett\projects\angelscript-sdk\angelscript\lib /LIBPATH:C:\Users\Jarrett\projects\sqlite3 /LIBPATH:C:\Users\Jarrett\projects\berkelium-win32\lib /LIBPATH:C:\Users\Jarrett\projects\SFML\lib "/LIBPATH:C:\Program Files\Assimp\lib\x86" "/LIBPATH:C:\Program Files (x86)\Boost\lib" /LIBPATH:C:\Users\Jarrett\projects\FreeImage\Dist "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\lib" opengl32.lib glew32.lib berkelium.lib sfml-system.lib sfml-window.lib assimp.lib freeimage.lib libboost_log-vc120-mt-1_54.lib libboost_log_setup-vc120-mt-1_54.lib libboost_date_time-vc120-mt-1_54.lib libboost_thread-vc120-mt-1_54.lib libboost_wave-vc120-mt-1_54.lib libboost_regex-vc120-mt-1_54.lib libboost_filesystem-vc120-mt-1_54.lib libboost_system-vc120-mt-1_54.lib build\BasicSceneManager.obj build\BasicSceneNode.obj build\Camera.obj build\GlrProgram.obj build\GraphicsEngine.obj build\Light.obj build\Window.obj build\common\math\Math.obj build\common\io\File.obj build\BasicSceneManager.obj build\BasicSceneNode.obj build\Camera.obj build\GlrProgram.obj build\GraphicsEngine.obj build\Light.obj build\Window.obj build\exceptions\Exception.obj build\exceptions\FormatException.obj build\exceptions\GlException.obj build\exceptions\IoException.obj build\gui\CallbackParameter.obj build\gui\GUI.obj build\gui\GUIObject.obj build\gui\HtmlGuiComponent.obj build\models\Animation.obj build\models\AssImpLoader.obj build\models\Model.obj build\models\ModelLoader.obj build\models\ModelManager.obj build\glw\Animation.obj build\glw\AnimationManager.obj build\glw\Constants.obj build\glw\Material.obj build\glw\MaterialManager.obj build\glw\Mesh.obj build\glw\MeshManager.obj build\glw\OpenGlDevice.obj build\glw\Texture.obj build\glw\TextureManager.obj build\glw\shaders\CPreProcessor.obj build\glw\shaders\GlrParser.obj build\glw\shaders\GlrPreProcessor.obj build\glw\shaders\GlrShader.obj build\glw\shaders\GlrShaderProgram.obj build\glw\shaders\GlslShader.obj build\glw\shaders\GlslShaderProgram.obj build\glw\shaders\ShaderProgramManager.obj// //link @c:\users\jarrett\appdata\local\temp\tmpecwym3.lnk// //Using tempfile c:\users\jarrett\appdata\local\temp\tmpep9gzl.lnk for command line:// //link /nologo /dll /out:build\glr.dll /implib:build\glr.lib /LIBPATH:build /LIBPATH:src /LIBPATH:C:\Users\Jarrett\projects\angelscript-sdk\angelscript\lib /LIBPATH:C:\Users\Jarrett\projects\sqlite3 /LIBPATH:C:\Users\Jarrett\projects\berkelium-win32\lib /LIBPATH:C:\Users\Jarrett\projects\SFML\lib "/LIBPATH:C:\Program Files\Assimp\lib\x86" "/LIBPATH:C:\Program Files (x86)\Boost\lib" /LIBPATH:C:\Users\Jarrett\projects\FreeImage\Dist "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\lib" opengl32.lib glew32.lib berkelium.lib sfml-system.lib sfml-window.lib assimp.lib freeimage.lib libboost_log-vc120-mt-1_54.lib libboost_log_setup-vc120-mt-1_54.lib libboost_date_time-vc120-mt-1_54.lib libboost_thread-vc120-mt-1_54.lib libboost_wave-vc120-mt-1_54.lib libboost_regex-vc120-mt-1_54.lib libboost_filesystem-vc120-mt-1_54.lib libboost_system-vc120-mt-1_54.lib build\BasicSceneManager.obj build\BasicSceneNode.obj build\Camera.obj build\GlrProgram.obj build\GraphicsEngine.obj build\Light.obj build\Window.obj build\common\math\Math.obj build\common\io\File.obj build\BasicSceneManager.obj build\BasicSceneNode.obj build\Camera.obj build\GlrProgram.obj build\GraphicsEngine.obj build\Light.obj build\Window.obj build\exceptions\Exception.obj build\exceptions\FormatException.obj build\exceptions\GlException.obj build\exceptions\IoException.obj build\gui\CallbackParameter.obj build\gui\GUI.obj build\gui\GUIObject.obj build\gui\HtmlGuiComponent.obj build\models\Animation.obj build\models\AssImpLoader.obj build\models\Model.obj build\models\ModelLoader.obj build\models\ModelManager.obj build\glw\Animation.obj build\glw\AnimationManager.obj build\glw\Constants.obj build\glw\Material.obj build\glw\MaterialManager.obj build\glw\Mesh.obj build\glw\MeshManager.obj build\glw\OpenGlDevice.obj build\glw\Texture.obj build\glw\TextureManager.obj build\glw\shaders\CPreProcessor.obj build\glw\shaders\GlrParser.obj build\glw\shaders\GlrPreProcessor.obj build\glw\shaders\GlrShader.obj build\glw\shaders\GlrShaderProgram.obj build\glw\shaders\GlslShader.obj build\glw\shaders\GlslShaderProgram.obj build\glw\shaders\ShaderProgramManager.obj// //build\BasicSceneManager.obj : warning LNK4042: object specified more than once; extras ignored// //build\BasicSceneNode.obj : warning LNK4042: object specified more than once; extras ignored// //build\Camera.obj : warning LNK4042: object specified more than once; extras ignored// //build\GlrProgram.obj : warning LNK4042: object specified more than once; extras ignored// //build\GraphicsEngine.obj : warning LNK4042: object specified more than once; extras ignored// //build\Light.obj : warning LNK4042: object specified more than once; extras ignored// //build\Window.obj : warning LNK4042: object specified more than once; extras ignored// //LINK : fatal error LNK1104: cannot open file 'libboost_log-vc110-mt-1_54.lib'// //scons: building terminated because of errors.// //scons: *** [build/glr.dll] Error 1104/ I'm curious why it's trying to link to `libboost_log-vc110-mt-1_54.lib` instead of `libboost_log-vc120-mt-1_54.lib`, which is what I specified in the link command. Also, as far as I can tell, `vcxxx` is the compiler tag boost uses to tell what version of the compiler built the boost library...so it's almost like `scons` thinks boost was built using Visual Studio 2012, which would be `vc110`...I'm not sure. Any help is appreciated! Cheers Jarrett

4 5

How to correctly run Boost.Python?
by Wenlong Wang 25 Sep '13

25 Sep '13

Hi, All This is my first message at this mailing list, apologies first if I raised some simple question. I am using Microsoft Visual Studio 2012 Express Version, and Python 2.7. My boost version is 1.54.0. I followed the Boost Library instruction at http://www.boost.org/doc/libs/1_54_0/more/getting_started/windows.html#i nstall-boost-build And successfully build Boost in my computer with a message "The Boost C++ Libraries were successfully built!" My Boost path is "C:\local\boost_1_54_0" Then I want to run Boost.Python, and find it requires to be built separately. So, I found Boost.Python Library instructions at http://www.boost.org/doc/libs/1_54_0/libs/python/doc/building.html#basic -procedure In step 3.1 Basic Procedure, the Boost.Python Library instructions lead me back to Boost Library instruction section 5, at where I installed the Boost.Build at "C:\local\boost_1_54_0\BoostBuild". And "C:\local\boost_1_54_0\BoostBuild\bin" has been added to my Path environment variable. So now I am back to the Boost.Python Library instructions at section 3.1.3. I followed the instruction and cd into the "C:\local\boost_1_54_0\libs\python\example\quickstart". The next step, according to the instruction is : Invoke bjam. Replace the "stage" argument from the example invocation from section 5 of the Getting Started Guide <http://www.boost.org/doc/libs/1_54_0/more/getting_started/index.html> with "test," to build all the test targets. Also add the argument "--verbose-test" to see the output generated by the tests when they are run. On Windows, your bjam invocation might look something like: C:\boost_1_34_0\...\quickstart> bjam toolset=msvc --verbose-test test Then I got 135 unresolved external errors. One of them is as follows: exec.obj : error LNK2019: unresolved external symbol __imp__PyEval_GetGlobals referenced in function "class boost::python::api::object __cdecl boost::python::eval(class boost::python::str,class boost::python::api::object,class boost::python::api::object)" (?eval@python@boost@@YA?AVobject@api@12@Vstr@12@V3412@1@Z) ..\..\..\..\bin.v2\libs\python\build\msvc-11.0\debug\boost_python-vc110- gd-1_54.dll : fatal error LNK1120: 135 unresolved externals May I know what am I wrong? How can I fix this? Thank you very much. Regards Long Wenlong Wang Risk Analyst, Capquest Group Ltd Email: wwang(a)capquest.co.uk Fleet 27, Rye Close, Fleet, GU51 2QQ. Website: http://www.capquest.co.uk/ This e-mail is intended solely for the addressee, is strictly confidential and may also be legally privileged. If you are not the addressee please do not read, print, re-transmit, store or act in reliance on it or any attachments. Instead, please email it back to the sender and then immediately permanently delete it. E-mail communications cannot be guaranteed to be secure or error free, as information could be intercepted, corrupted, amended, lost, destroyed, arrive late or incomplete, or contain viruses. We do not accept liability for any such matters or their consequences. Anyone who communicates with us by e-mail is taken to accept the risks in doing so. Opinions, conclusions and other information in this e-mail and any attachments are solely those of the author and do not represent those of Capquest Group Limited or any of its subsidiaries unless otherwise stated. Capquest Group Limited (registered number 4936030), Capquest Debt Recovery Limited (registered number 3772278), Capquest Investments Limited (registered number 5245825), Capquest Asset Management Limited (registered number 5245829) and Capquest Mortgage Servicing Limited (registered number 05821008) are all limited companies registered in England and Wales with their registered offices at Fleet 27, Rye Close, Fleet, Hampshire, GU51 2QQ. Each company is a separate and independent legal entity. None of the companies have any liability for each other's acts or omissions. Group VAT registration number 844281719. Members of the Capquest group are regulated under the Consumer Credit Act 1974 and are members of the Credit Services Association. This communication is from the company named in the sender's details above.

1 0

[BGL] memory leak in graph/r_c_shortest_paths.hpp
by potato_research 24 Sep '13

24 Sep '13

Hello, I'm using BGL in my project and, with some input data, I get - sooner or later, as I run r_c_shortest_paths many times - a segfault. This behaviour is apparently quite random, as I can see by implementing a custom visitor that the last label evaluated before the crash changes all the time. I must also say that the graph I use, while always having the same topological structure, has different properties that affect labelling each time I run the algorithm and these vary quite randomly from one run to the other, as they are generated by a random heuristics. Anyway, with one particular set of input data, I manage to have the program segfault (as I said, sooner or later) 100% of the times. This is far from being an MWE, but it's the best I could produce. I tried to debug the memory leak with valgrind and it turns out that r_c_shortest_paths_dispatch is trying to access memory in a block previously freed by: l_alloc.deallocate( cur_outer_splabel.get(), 1 ); in r_c_shortest_paths.hpp:314. After some debugging I started to believe that the problem doesn't rely with my code, but it might be a bug in r_c_shortest_paths.hpp. If this is actually the case and where the problem lies, though, I haven't been able to figure out with certainty. The output from valgrind can be found here: http://pastebin.com/raw.php?i=WWafwFv3 (output cleaned up and with templates substituted) http://pastebin.com/raw.php?i=cb3p6jzM (raw output intended to facilitate reading and with templates substituted) http://pastebin.com/raw.php?i=qeauBQTm (raw output indented to facilitate reading) http://pastebin.com/raw.php?i=hpppf49c (raw output) My code (the whole project) can be found here: https://github.com/alberto-santini/maritime-vrp In order to run it, one must have a licensed copy of CPLEX and change the include and library paths in the Makefile's accordingly. Unfortunately, without putting the labelling part inside a price-and-branch procedure (that uses CPLEX as a solver for the master problem) I wasn't able to produce input data by hand that would lead me to obtain the segfault. I understand this is not the best way to investigate into a bug and will be happy to provide any further help if requested to. Thanks, AS -- View this message in context: http://boost.2283326.n4.nabble.com/BGL-memory-leak-in-graph-r-c-shortest-pa… Sent from the Boost - Users mailing list archive at Nabble.com.

2 4

BJAM and VS2013RC
by LeMay.Steve 23 Sep '13

23 Sep '13

Has anyone successfully built Boost 1.54 with VS2013RC? Did you have an issue with the build process locating cl ? Steven LeMay Game Platform Engineering International Game Technology 9295 Prototype Way Reno, NV 89521 Office: +1 775.448.8089 Mobile: +1 775.813.6676 steven.lemay(a)igt.com<mailto:steven.lemay@igt.com> This email message is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. Any humorous implications are purely the result of misinterpretations provided by the reader.

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Re: [Boost-users] [boost] cross-compilation x86_64-w64-ming32: undefined reference to `InterlockedIncrement'
by Frédéric Bron 23 Sep '13

23 Sep '13

> I probably missed the original problem, but the patch doesn't look correct > to me. The section guarded with "defined( BOOST_MSVC ) || defined( > BOOST_INTEL_WIN )" is obviously targeted for compilers supporting > interlocked intrinsics, which gcc isn't. MinGW should probably be handled > by the last section of the #if/elif/endif sequence. Anyway, what problem > are you trying to fix? Here is what I get when build an application with boost and mingw-w64 targeting x86_64: /usr/x86_64-w64-mingw32/sys- root/mingw/lib/../lib/libboost_thread-mt.a(thread.o):(.text+0x286): undefined reference to `InterlockedIncrement' /usr/x86_64-w64-mingw32/sys-root/mingw/lib/../lib/libboost_thread-mt.a(thread.o):(.text+0x3e7): undefined reference to `InterlockedDecrement' /usr/lib64/gcc/x86_64-w64-mingw32/4.8.1/../../../../x86_64-w64-mingw32/bin/ld: /usr/x86_64-w64-mingw32/sys-root/mingw/lib/../lib/libboost_thread-mt.a(thread.o): bad reloc address 0x8 in section `.data' I have been able to solve this by defining BOOST_USE_WINDOWS_H but this creates issues with Unicode when I also use wxWidgets. The patch proposed solves the issue. I recognise that I say that gcc should be considered as MSVC with regards to these Interlocked things which I do not understand. It may seem strange but it works. What's wrong with it? Basically, I just #include <intrin.h>; what's wrong with that? Frédéric

1 0

Re: [Boost-users] cross-compilation x86_64-w64-ming32: undefined reference to `InterlockedIncrement'
by Frédéric Bron 23 Sep '13

23 Sep '13

So I eventually managed to fix the issue with interlocked.hpp and mingw-w64: both i686 and x86_64 now work. Attached is a patch against 1.54.0. Is it possible to include this in 1.55.0? Regards, Frédéric

1 0

Multiple instance of options
by Ulf Samuelsson 23 Sep '13

23 Sep '13

Need to parse an "ini" file which configures one or more sensors. The sensors can be of the same type and are identified by "name", "type" and an "id" Some configuration items are for all sensors Other configuration tiems are only for some sensors. [sensor] SensorName="Outdoor Temp" SensorType=1 # Temp Sensor SensorID=1000 SerialNumber="12344" Active=1 Device="/dev/ttyUSB01" [sensor] SensorName="Indoor Temp" SensorType=1 # Temp Sensor SensorID=1001 SerialNumber="12345" Active=1 Device="/dev/USB02" [sensor] SensorName="Light" SensorType=2 # Light Sensor SensorID=1002 SerialNumber="12349" Active=1 Device="/dev/ttyUSB02" MaxLumen="500" Is having multiple identical section names possible with boost program options? It is of course possible to do [sensor_1] ... [sensor_2] ... [sensor_3] ... but that is not so nice looking, and you get a hard limit on the number of sensors you can attach. Ideas? BR Ulf Samuelsson

3 3

Question about boost.build and automatic selection of toolsets
by Mauricio Carneiro 22 Sep '13

22 Sep '13

I am using boost-build in my project (very happy with the outcome) but I would like to have the toolset selected automatically based on the operating system. Currently I am running successfully from the command line by manually setting the toolset when I am running it from macos and linux accordingly, but I feel like the Jamroot file should be able to figure that out for me. Any ideas? I made a more descriptive post on stack overflow, to share the knowledge once we figure this one out. http://stackoverflow.com/questions/18939911/choosing-compiler-options-based… Thank you, Mauricio Carneiro, Ph.D. http://www.broadinstitute.org/~carneiro/

2 1

units
by Robert Ramey 22 Sep '13

22 Sep '13

I have a program in which there is the notion of consumption rate such as m^3/sec, gallons/hour, etc. I have consumption_rate unit defined in terms of si units. I read in a quanity in gallons/hour and so far so good. If I display the quantity it is displayed as m^3/sec. This displays the "compound units" as expected - very cool. All this is OK as far as it goes. When I try to display the quantity as gallons/hour again I have a whole host of problems. The attached test fill illustrates the issues. The only way I've been able to do is is by making a complete end run around the units system itself - sort of self defeating. I would appreciate insight anyone might be able to offer into this issue. Robert Ramey begin 666 test_units.cpp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a)I.PT*(" @('-T9#HZ8V]U=" \/"!R("H@9V%L;&]N<R O(&AO=7(@ M/#P@(B M(&9I;F%L;'DA('1H92!C;W)R96-T(')E<W5L="$B(#P\('-T9#HZ M96YD;#L-"@T*(" @('-T9#HZ8V]U=" \/"!S=&0Z.F5N9&P[#0H@(" @#0H@ M(" @<75A;G1I='D\<VDZ.F%R96$^(" @(" @02@Q+C4J<VDZ.FUE=&5R*F-G M<SHZ8V5N=&EM971E<BD[#0H@(" @#0H@(" @<W1D.CIC;W5T(#P\(#$N-2IS M:3HZ;65T97(J8V=S.CIC96YT:6UE=&5R(#P\('-T9#HZ96YD; T*(" @(" @ M(" @(" @(" \/"!!(#P\('-T9#HZ96YD; T*(" @(" @(" @(" @(" \/"!S A=&0Z.F5N9&P[#0H-"B @("!R971U<FX@,#L-"GT-"@T* ` end

2 3

Boost::Bind Problem
by vishal rawate 22 Sep '13

22 Sep '13

Hello, I am trying to use Boost::Bind to bind my function but I am getting an error as Bind cannot diffrentiate between the constructors even though they have diffrent function signatures. TestBind(boost::bind((&Test::process), &t1, _1)); I would highly appreciate any help. Thanks //Boost Includes #include <boost/function.hpp> #include <boost/bind.hpp> #include <boost/enable_shared_from_this.hpp> namespace test{ struct A{ public: int one; int two; }; struct B{ public: short three; short four; }; typedef boost::shared_ptr<A> t_boostInt; typedef boost::shared_ptr<B> t_boostShort; class TestBind{ public: typedef boost::function< int (t_boostInt)> t_ProcessFunctionInt; public: ///< call back process function for short typedef boost::function< short (t_boostShort)> t_ProcessFunctionShort; public: TestBind( t_ProcessFunctionInt func){} TestBind(t_ProcessFunctionShort func){} }; class Test { public: Test(){} ~Test(); public: int process(t_boostInt msg) { return 1;} }; int main(int argc, char * argv[]) { try { Test t1; TestBind(boost::bind((&Test::process), &t1, _1)); } catch (std::exception & exception) { std::cout << exception.what() << std::endl; } return 0; } }

3 4

Newbie boost::spirit rule semantic action question
by LeMay.Steve 21 Sep '13

21 Sep '13

Brand-newbie boost::spirit::qi question. MSVS2012, boost 1.54 I have a response from a serial device that provides with 0 or more "profiles" in a given character format. I want to capture the number of profile responses in the list (semantic action) as well as have the value into the final result (std::vector<std::string>). How do I properly express this? Given the input.... (in this case, there are zero profiles returned) *ARSS:0<CR><LF>OK<CR><LF> Expect a vector of strings containing "*ARSS" "0" "OK" This sub-rule fails to return... (Not failing to parse) boost::spirit::qi::rule<Iter, std::vector<std::string>(), boost::spirit::qi::locals<int, std::string>> service_search_list; service_search_list %= // %= operator is necessary for attribute propagation when using symantic attributes (anything in [ ]) string ("*ARSS") >> colon >> // Initial response +digit [qi::_a = qi::_1] >> crlf >> // Number of discovered devices - save in local qi::_a qi::omit [ok [qi::_b = qi::_1]] >> // Match but don't emit the "OK" here - save it for the end qi::repeat (qi::_a) // Repeat for each discovered device [ crlf >> ( qi::hold [profile1] | qi::hold [profile2] ... ) ] >> qi::attr(qi::_b); // Emit the "OK" here at the end of the list Using qi::int_[qi::_a = qi::_1] provides and empty string "" in the result and not "0". If I omit the numeric input from the result... qi::omit [qi::int_[qi::_a = qi::_1]] the parse will succeed but number of items in the response list is lost in the final result (omitted as requested). Any suggestion is appreciated, I'm stumped.

2 2

Re: [Boost-users] Boost::Bind Problem
by Sergey Zhuravlev 21 Sep '13

21 Sep '13

Try use TestBind f(boost::bind(boost::type<TestBind::t_ProcessFunctionInt>(), (&Test::process), &t1, _1)); for ambiguity. Either ...boost::bind<TestBind::t_ProcessFunctionInt>..., but less portable.

1 0

build errors with 1.54 on linux
by Dev Guy 21 Sep '13

21 Sep '13

Hello All, I am building boost 1.54 on a linux box and I am seeing the following error messages after the build: gcc.compile.c++ bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/instantiate_re2c_lexer_str.o gcc.compile.c++ bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/token_ids.o gcc.compile.c++ bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/wave_config_constant.o common.mkdir bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/cpplexer common.mkdir bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/cpplexer/re2clex gcc.compile.c++ bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/cpplexer/re2clex/aq.o gcc.compile.c++ bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/cpplexer/re2clex/cpp_re.o gcc.archive bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/libboost_wave.a common.copy /home/yadav/dev/cpp/boost_1.54/lib/libboost_wave.a ...failed updating 29 targets... ...updated 10797 targets... How can I know what these 29 targets have failed and how to go about getting a clean build? Thanks!

2 1

[units] Convert from Degree Minutes to Degrees
by Ryan 21 Sep '13

21 Sep '13

Angles have their own system that define both radians and degrees. I would like to create the necessary type for minutes (this is 1/60 of a degree). My first thought was to create a scale unit with degrees as the base type. I couldn't determine how to enter the scale of 1/60. The other option is to define a new base unit. I would think using the degrees base unit would be a good reference, but it uses an "INTERNAL ONLY" macro call "BOOST_UNITS_DEFINE_BASE_UNIT_WITH_CONVERSIONS". What should I use to create a unit type that will convert from degree minutes to just degrees? Ryan

2 2

tcp::socket::is_open() is true after socket is closed
by niXman 20 Sep '13

20 Sep '13

Hi, In the following simple code: tcp::socket socket(ios); ... const bool iso1 = socket.is_open(); socket.close(); const bool iso2 = socket.is_open(); I get: iso1 == iso2 == true Why? Thanks. -- Regards, niXman ___________________________________________________ Dual-target(32 & 64-bit) MinGW compilers for 32 and 64-bit Windows: http://sourceforge.net/projects/mingwbuilds/ ___________________________________________________ Another online IDE: http://liveworkspace.org/

2 1

Getting ASIO application to link (undefined reference to `boost::system::generic_category())
by Ulf Samuelsson 20 Sep '13

20 Sep '13

Hi, Trying to get an ASIO example (udp_echo_client) to build on an Ubuntu 12.04 machine. It looks like both 1.46 and 1.48 can be installed. (I have installed 1.48). The libboost*.so all are linked vs 1.48, and the /usr/include/boost/version.hpp contains #define BOOST_LIB_VERSION "1_48" so I think that there should not be a version mismatch, I can build some really simple examples but, as soon as I add "asio" with the statement below, the build fails. using boost::asio::ip::udp; Fiirst problem is that `boost::system::generic_category()' is missing. When I grep the libboost libraries, they are only found in "libboost_[file]system[-mt].so" but these files are included in the link. Searching on Internet, also tells me to link with those libraries, which is not a help. Tried with "-mt" version as well. Added #include <boost/system/error_code.hpp> #include <boost/system/linux_error.hpp> without any change. What is going on? Running out of ideas... Thanks for any advice. /Ulf Samuelsson ---------------------------------------------------------- g++ -I/usr/include -Iinclude -L/usr/lib -lboost_filesystem -lboost_system -lpthread -std=c++0x -o udp_echo_client udp_echo_client.cpp /tmp/ccu20iRA.o: In function `__static_initialization_and_destruction_0(int, int)': udp_echo_client.cpp:(.text+0x58d): undefined reference to `boost::system::generic_category()' udp_echo_client.cpp:(.text+0x597): undefined reference to `boost::system::generic_category()' udp_echo_client.cpp:(.text+0x5a1): undefined reference to `boost::system::system_category()' /tmp/ccu20iRA.o: In function `boost::system::error_code::error_code()': udp_echo_client.cpp:(.text._ZN5boost6system10error_codeC2Ev[_ZN5boost6system10error_codeC5Ev]+0x10): undefined reference to `boost::system::system_category()' /tmp/ccu20iRA.o: In function `boost::asio::error::get_system_category()': udp_echo_client.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[boost::asio::error::get_system_category()]+0x7): undefined reference to `boost::system::system_category()' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_tss_ptr_create(unsigned int&)': udp_echo_client.cpp:(.text._ZN5boost4asio6detail20posix_tss_ptr_createERj[boost::asio::detail::posix_tss_ptr_create(unsigned int&)]+0x15): undefined reference to `pthread_key_create' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_thread::~posix_thread()': udp_echo_client.cpp:(.text._ZN5boost4asio6detail12posix_threadD2Ev[_ZN5boost4asio6detail12posix_threadD5Ev]+0x1d): undefined reference to `pthread_detach' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_thread::join()': udp_echo_client.cpp:(.text._ZN5boost4asio6detail12posix_thread4joinEv[boost::asio::detail::posix_thread::join()]+0x25): undefined reference to `pthread_join' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_thread::start_thread(boost::asio::detail::posix_thread::func_base*)': udp_echo_client.cpp:(.text._ZN5boost4asio6detail12posix_thread12start_threadEPNS2_9func_baseE[boost::asio::detail::posix_thread::start_thread(boost::asio::detail::posix_thread::func_base*)]+0x24): undefined reference to `pthread_create' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context>::~posix_tss_ptr()': udp_echo_client.cpp:(.text._ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_15task_io_serviceENS4_11thread_infoEE7contextEED2Ev[_ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_15task_io_serviceENS4_11thread_infoEE7contextEED5Ev]+0xf): undefined reference to `pthread_key_delete' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context>::operator boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context*() const': udp_echo_client.cpp:(.text._ZNK5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_15task_io_serviceENS4_11thread_infoEE7contextEEcvPS7_Ev[boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context>::operator boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context*() const]+0xf): undefined reference to `pthread_getspecific' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::strand_service::strand_impl, unsigned char>::context>::~posix_tss_ptr()': udp_echo_client.cpp:(.text._ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_14strand_service11strand_implEhE7contextEED2Ev[_ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_14strand_service11strand_implEhE7contextEED5Ev]+0xf): undefined reference to `pthread_key_delete' /tmp/ccu20iRA.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context>::operator=(boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context*)': udp_echo_client.cpp:(.text._ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_15task_io_serviceENS4_11thread_infoEE7contextEEaSEPS7_[boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context>::operator=(boost::asio::detail::call_stack<boost::asio::detail::task_io_service, boost::asio::detail::task_io_service::thread_info>::context*)]+0x16): undefined reference to `pthread_setspecific' collect2: ld returnerade avslutningsstatus 1 make: *** [udp_echo_client] Fel 1 -------------------------------------------------------------- Makefile: ------------------------------------------------------ # Using 1.48.0 in Ubuntu 12.04 BOOST=/usr INCLUDES += -I$(BOOST)/include -Iinclude LIBS +=-L$(BOOST)/lib -lboost_filesystem -lboost_system -lpthread CFLAGS=$(INCLUDES) $(LIBS) -std=c++0x all: udp_echo_client udp_echo_client: udp_echo_client.cpp g++ $(CFLAGS) -o $@ udp_echo_client.cpp clean: rm -f udp_echo_client rm -f *~ -------------------------------------------------------- Code from example: -------------------------------------------------------- // // blocking_udp_echo_client.cpp // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com) // // 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) // #include <cstdlib> #include <cstring> #include <iostream> #include <boost/asio.hpp> using boost::asio::ip::udp; enum { max_length = 1024 }; int main(int argc, char* argv[]) { try { if (argc != 3) { std::cerr << "Usage: blocking_udp_echo_client <host> <port>\n"; return 1; } boost::asio::io_service io_service; udp::socket s(io_service, udp::endpoint(udp::v4(), 0)); udp::resolver resolver(io_service); udp::endpoint endpoint = *resolver.resolve({udp::v4(), argv[1], argv[2]}); std::cout << "Enter message: "; char request[max_length]; std::cin.getline(request, max_length); size_t request_length = std::strlen(request); s.send_to(boost::asio::buffer(request, request_length), endpoint); char reply[max_length]; udp::endpoint sender_endpoint; size_t reply_length = s.receive_from( boost::asio::buffer(reply, max_length), sender_endpoint); std::cout << "Reply is: "; std::cout.write(reply, reply_length); std::cout << "\n"; } catch (std::exception& e) { std::cerr << "Exception: " << e.what() << "\n"; } return 0; }

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Re: [Boost-users] cross-compilation x86_64-w64-ming32: undefined reference to `InterlockedIncrement'
by Frédéric Bron 19 Sep '13

19 Sep '13

> Solved this by adding define=BOOST_USE_WINDOWS_H and that forces the include > of windows.h and as such the different types of InterlockedIncrement. I tried that and it worked until I realized that including windows.h causes me lots of troubles in another library (wxWidgets) so that I cannot use this solution. What is in windows.h that should be copied in interlocked.hpp? I start to be desperate to build a 64 bit version of my program with mingw-w64... also, it is difficult because I have absolutly no idea of what these interlocked... mean. Regards, Frédéric

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Variadic versions of all the vector200 map50 stuff
by Michael Steinberg 19 Sep '13

19 Sep '13

Hello, I'm currently tracking down all the slowdowns I encounter when using boost in my Visual Studio solutions. Much of the slowdowns seem to happen, because there's a wide inclusion-usage of <boost/typeof/vector.hpp> throughout boost. This seems to be a replicate of <boost/mpl/vector.hpp>, which is not as much used, but equally evil. Inclusion of any of these headers leads to a 20MB increase in Visual Studio IntelliSense database size. I tested to comment out the inclusion of all the generated <vectorXXX.hpp>. This indeed works fine and is a real relief in Visual Studio responsiveness, because although these headers seem to be included from everywhere, they dont seem to be actually used. Tracking down the inclusion paths proves difficult to me, because the Visual-Studio tool doesn't seem to be able to handle the Preprocessor-generated include directives that boost uses extensively (and I'm just a newbie). With the advent of variadic-enabled compilers (Visual Studio 2013RC just arrived), is anybody working on making this mpl-stuff variadic? That would be a major help for almost anybody using tools like IntelliSense or VisualAssist (the vector200.hpp is a wopping 2mb of totally redundant template goodness...). I think I could make the appropriate changes to my local copy, however I have no idea how to write proper boost-worthy code or even how to file it for inclusion. Also I'm not too sure why the different sized vectors have different names and if the client code relies on that, etc., but I could probably find out. Are there any "template-instantiation-coverage"-tests included, so I could check that my variadics are compatible in the use-cases? Any help would be appreciated! With Kind Regards Michael

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[boost-regex] 1.47.0 regexp_search with match_partial does not return 'what'
by Frank Bergemann 18 Sep '13

18 Sep '13

2 1

Static map like array or range?
by Duane Murphy 18 Sep '13

18 Sep '13

I find myself often building lookup tables for conversion or mapping of one piece of data to another. Common conversions include * converting from one string to a different string (e.g. text translation), * converting from an enum to a descriptive string * converting from a string to an enum * converting from a string to a function or functor The key aspect of these lookup tables is that they are static. If the table is reasonably large, say 7-10 items, I ensure that the table is presorted and use lower_bounds() to search the table. Some uses have started using map_list_of() to initialize the map. My inner optimizer finds this disturbing as inherently static information is being allocated dynamically in order to due to the lookup. I believe it would be more intuitive if there was a map like interface to the lookup table. The implementation would use the static nature of the data to its advantage. In particular the implementation would not require the data to be copied, re-allocated, etc. I've been searching the boost libraries, but have not been able to find something like this. Thank you for your suggestions. …Duane

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Copy fusion::vector -> {std,boost}::array
by Rodrigo Madera 17 Sep '13

17 Sep '13

Checking the archives, I see that a *lot* was discussed on [1], and there was a mention (waaay after much debate and proposed solutions) on having a copy and copy_if to do such copies. Mr. Steven Watanabe mentioned a copy impl was lying around his computer [2]. Did it actually make it into Boost? Thanks for any input, Rodrigo [1] http://lists.boost.org/boost-users/2010/10/63168.php [2] http://lists.boost.org/boost-users/2010/10/63343.php

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Generic “Observable” mixin based on Boost
by Павел Фролов 17 Sep '13

17 Sep '13

I find Observer pattern a very useful tool to decrease coupling between modules of a system. Boost provides Signals2 which can be used for that purpose. But adding Signal2 objects to arbitrary classes is not very convenient, because your must manually implement RegisterEvent/FireEvent functions. What I was looking for is a reusable mixin which could add “Observable” behavior to arbitrary class with minimal hassle. Ideally, the user of mixing must only provide event table which contains event tags and handler signatures, e.g. (in pseudocode): EventTable { EventA: void(), EventB: int(bool), ... } I came up with working proof of concept which uses CRTP-based mixin and traits class for event table declaration. I'm new to template meta-programming, so I'm looking forward to comments about possible improvements. In particular, I'm not very satisfied with syntax boost::fusion::pair<Show, boost::optional<boost::signals2::signal<void()>>> (see attachement). I think, I can do better by allowing user to specify just boost::fusion::pair<Show, void()> and then generate proper type with mpl::transform and/or fusion::transform. This way is shorter and implementation details (optional, signals2) are hidden from the user. The mixin code (full code with example usage in attachment): #include <utility> #include <boost/fusion/container/map.hpp> #include <boost/fusion/sequence/intrinsic/at_key.hpp> #include <boost/fusion/sequence/intrinsic/value_at_key.hpp> #include <boost/optional.hpp> #include <boost/signals2.hpp> #include <boost/utility/in_place_factory.hpp> //***************************************************************************** // EventSource mixin //***************************************************************************** // event source traits base (concrete event source must create specialization) template<typename ConcreteEventSource> struct Events; // event source mixin (using CRTP) template<typename ConcreteEventSource> class EventSource { public: typedef ::Events<ConcreteEventSource> Events; private: typedef typename Events::EventTable EventTable; // helper type generator template<typename Event> struct GetType { // boost::optional type typedef typename boost::fusion::result_of:: value_at_key<EventTable, Event>::type SignalWrapper; // boost::signal type for particular boost::optional type typedef typename SignalWrapper::value_type Signal; // slot return type for particular boost::signal type typedef typename Signal::result_type SignalReturnType; }; public: // connect event handler template<typename Event, typename Handler> void Connect(Handler&& handler) { GetSignal<Event>()->connect(std::move(handler)); } protected: // generate nullary signal template<typename Event> typename GetType<Event>::SignalReturnType FireEvent() { return GetSignal<Event>()->operator()(); } // generate unary signal template<typename Event, typename Arg1> typename GetType<Event>::SignalReturnType FireEvent(Arg1 arg1) { return GetSignal<Event>()->operator()(arg1); } // ... more overloads (MSVC does not support variadic templates) private: // creates signal if not exists, returns reference to it template<typename Event> typename GetType<Event>::SignalWrapper& GetSignal() { auto& signal = boost::fusion::at_key<Event>(signals_); if (!signal) signal = boost::in_place(); return signal; } EventTable signals_; };

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