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[bimap] initializing from range of pair<T&, U&> elements
by Nathan Ridge 06 Jul '11

06 Jul '11

Hello, I am trying to initialize a bimap<T, U> with a vector<pair<T&, U&>> (the "vector" part isn't important, any range with elements of type pair<T&, U&> has the same effect), but I'm getting a rather monstrous compiler error. The same initialization works for std::map<T, U>. Here is the code: #include <boost/bimap.hpp> #include <boost/range/begin.hpp> #include <boost/range/end.hpp> #include <vector> #include <map> #include <utility> int main() { int i1, i2; float f1, f2; std::vector<std::pair<int&, float&>> myvec{{i1, f1}, {i2, f2}}; std::map<int, float> m(boost::begin(myvec), boost::end(myvec)); // WORKS boost::bimap<int, float> b(boost::begin(myvec), boost::end(myvec)); // FAILS } The compiler errors are shown below. It seems to me this should work. As with std::map, the pair-of-iterators constructor should call something like insert(const value_type&) for each element of the range, where value_type is something like pair<const T, U> which should be constructible from pair<T&, U&>, the element type of the range. Why is this not working? Thanks, Nate. P.S. Here are the errors: In file included from B:\Dev\Libraries\boost/boost/bimap/detail/bimap_core.hpp:34:0, from B:\Dev\Libraries\boost/boost/bimap/bimap.hpp:61, from B:\Dev\Libraries\boost/boost/bimap.hpp:13, from test.cpp:1: B:\Dev\Libraries\boost/boost/multi_index_container.hpp: In constructor 'boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::multi_index_container(InputIterator, InputIterator, boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::ctor_args_list&, boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::allocator_type&) [with InputIterator = __gnu_cxx::__normal_iterator<std::pair<int&, float&>*, std::vector<std::pair<int&, float&> > >, Value = boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, IndexSpecifierList = boost::bimaps::detail::bimap_core<int, float, mpl_::na, mpl_::na, mpl_::na>::core_indices, Allocator = std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> >, boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::ctor_args_list = boost::tuples::cons<boost::tuples::tuple<boost::multi_index::member<boost::bimaps::relation::detail::relation_storage<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, true>, float, &boost::bimaps::relation::detail::relation_storage<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, true>::right>, std::less<float>, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>, boost::tuples::cons<boost::tuples::tuple<boost::multi_index::member<boost::bimaps::relation::detail::relation_storage<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, true>, int, &boost::bimaps::relation::detail::relation_storage<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, true>::left>, std::less<int>, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>, boost::tuples::null_type> >, boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::allocator_type = std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> >]': B:\Dev\Libraries\boost/boost/bimap/bimap.hpp:252:8: instantiated from 'boost::bimaps::bimap<KeyTypeA, KeyTypeB, AP1, AP2, AP3>::bimap(InputIterator, InputIterator, boost::bimaps::bimap<KeyTypeA, KeyTypeB, AP1, AP2, AP3>::allocator_type&) [with InputIterator = __gnu_cxx::__normal_iterator<std::pair<int&, float&>*, std::vector<std::pair<int&, float&> > >, KeyTypeA = int, KeyTypeB = float, AP1 = mpl_::na, AP2 = mpl_::na, AP3 = mpl_::na, boost::bimaps::bimap<KeyTypeA, KeyTypeB, AP1, AP2, AP3>::allocator_type = std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> >]' test.cpp:15:70: instantiated from here B:\Dev\Libraries\boost/boost/multi_index_container.hpp:235:9: error: no matching function for call to 'boost::multi_index::multi_index_container<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, boost::bimaps::detail::bimap_core<int, float, mpl_::na, mpl_::na, mpl_::na>::core_indices, std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> > >::insert_(std::pair<int&, float&>&, boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::index_node_base<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> > > > >*)' B:\Dev\Libraries\boost/boost/multi_index_container.hpp:484:30: note: candidates are: std::pair<typename boost::multi_index::detail::multi_index_base_type<Value, IndexSpecifierList, Allocator>::type::node_type*, bool> boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::insert_(const Value&) [with Value = boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, IndexSpecifierList = boost::bimaps::detail::bimap_core<int, float, mpl_::na, mpl_::na, mpl_::na>::core_indices, Allocator = std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> >, typename boost::multi_index::detail::multi_index_base_type<Value, IndexSpecifierList, Allocator>::type::node_type = boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::index_node_base<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> > > > >] B:\Dev\Libraries\boost/boost/multi_index_container.hpp:505:30: note: std::pair<typename boost::multi_index::detail::multi_index_base_type<Value, IndexSpecifierList, Allocator>::type::node_type*, bool> boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::insert_(const Value&, boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::node_type*) [with Value = boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, IndexSpecifierList = boost::bimaps::detail::bimap_core<int, float, mpl_::na, mpl_::na, mpl_::na>::core_indices, Allocator = std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> >, typename boost::multi_index::detail::multi_index_base_type<Value, IndexSpecifierList, Allocator>::type::node_type = boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::index_node_base<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> > > > >, boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::node_type = boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::index_node_base<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true>, std::allocator<boost::bimaps::relation::mutant_relation<boost::bimaps::tags::tagged<const int, boost::bimaps::relation::member_at::left>, boost::bimaps::tags::tagged<const float, boost::bimaps::relation::member_at::right>, mpl_::na, true> > > > >] mingw32-make: *** [test.exe] Error 1

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[asio] [thread] Code review for correct use of boost sockets and threads
by Konrad Reiche 06 Jul '11

06 Jul '11

Hello everyone, I am using the boost library now for a couple of weeks. Unfortunately I've run into some problems with my C++ code and I would like to make sure that these problems are not caused due to incorrect use of boost. So basically I've written a small class which is suppossed to take messages and send them asynchronously. If there are more messages than can be processed, they queue up. The code is mainly based on the tutorial code provided on the boost website: http://www.boost.org/doc/libs/1_39_0/doc/html/boost_asio/tutorial/tutdaytim… I have 2 questions: 1. The constructor launches the threads, from this point on I want to be able to queue up messages, which are processed afer that by using the function MessageService::write. Is there any possible problem which could occur due to buffer or thread issues? Because sometimes the messages are not processed until the end and when they are processed they are corrupted. 2. Sometimes the messages are not processed when the application would quit. I have to make sure, that the messages are sent at least at the end. Sometimes there are 10.000+ messages queued up, so this might take a bit time. For this I've wrote MessageService::await(). It seems really bogus to me. I am checking the pending messages left for the following reason: When the host I am connecting to does not listen on the port I am connecting to, I don't receive an error by the functions I am using. So the messages are queued up and nothing happens. I don't know why. Have I forgot any checking whether the connection could be established? In the hope my question is not too generic, I would be really grateful for any advice. I am sorry I could not provide any specific errors, but this is due to the reason all the problems evolve on the client side by receiving corrupted messages. - Konrad /* * MessageService.cpp * * Created on: 04.06.2011 * Author: Konrad Johannes Reiche */ #include "MessageService.h" using namespace google::protobuf::io; using boost::asio::ip::tcp; MessageService::MessageService(std::string ip, std::string port) : work(io_service), resolver(io_service), socket(io_service) { messageQueue = new std::deque<AgentMessage>; tcp::resolver::query query(ip, port); endpoint_iterator = resolver.resolve(query); tcp::endpoint endpoint = *endpoint_iterator; socket.async_connect(endpoint, boost::bind(&MessageService::handle_connect, this, boost::asio::placeholders::error, ++endpoint_iterator)); boost::thread t(boost::bind(&boost::asio::io_service::run, &io_service)); } void MessageService::await() { while (!messageQueue->empty()) { signal(SIGINT, exit); int messagesLeft = messageQueue->size(); sleep(3); std::cout << "Pending Profiler Agents Messages: " << messageQueue->size() << std::endl; if (messagesLeft == messageQueue->size()) { std::cout << "Connection Error" << std::endl; break; } } } void MessageService::write(AgentMessage agentMessage, long systemTime, int JVM_ID) { agentMessage.set_timestamp(Agent::Helper::getCurrentClockCycle()); agentMessage.set_jvm_id(JVM_ID); agentMessage.set_systemtime(systemTime); io_service.post(boost::bind(&MessageService::do_write, this, agentMessage)); } void MessageService::do_close() { socket.close(); } void MessageService::transmitMessage(AgentMessage agentMessage) { boost::asio::streambuf b; std::ostream os(&b); ZeroCopyOutputStream *raw_output = new OstreamOutputStream(&os); CodedOutputStream *coded_output = new CodedOutputStream(raw_output); coded_output->WriteVarint32(agentMessage.ByteSize()); agentMessage.SerializeToCodedStream(coded_output); delete coded_output; delete raw_output; boost::system::error_code ignored_error; boost::asio::async_write(socket, b.data(), boost::bind( &MessageService::handle_write, this, boost::asio::placeholders::error)); } void MessageService::do_write(AgentMessage agentMessage) { bool write_in_progress = !messageQueue->empty(); messageQueue->push_back(agentMessage); if (!write_in_progress) { transmitMessage(agentMessage); } } void MessageService::handle_write(const boost::system::error_code &error) { if (!error) { messageQueue->pop_front(); if (!messageQueue->empty()) { transmitMessage(messageQueue->front()); } } else { std::cout << error << std::endl; do_close(); } } void MessageService::handle_connect(const boost::system::error_code &error, tcp::resolver::iterator endpoint_iterator) { // can be used to receive commands from the Java profiler interface } MessageService::~MessageService() { // TODO Auto-generated destructor stub }

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Re: [Boost-users] weird Google page when I try to search boost.org
by Richard L. Aurbach 05 Jul '11

05 Jul '11

I get it too. Simple query using both Safari and FireFox on Mac OS X. And on these browsers at this time (7/5/2011 3pm CDT) adding site:www.boost.org to the query doesn't help either... Cheers, Rick Aurbach, Ph.D. President and Chief Engineer Aurbach & Associates, Inc. 8233 Tulane Avenue, Suite B St. Louis, MO 63132 www: http://www.aurbach.com/ eMail: support(a)aurbach.com [business] rick(a)aurbach.com [personal] Fax: 314/678-0869 Phone: 800/774-7239 314/726-1321 "Elitism is the slur directed at merit by mediocrity." - Sydney J. Harris, journalist (1917-1986) "Life is easy to chronicle, but bewildering to practice." - E.M. Forster (1879-1970) "Cowardice asks the question, 'Is it safe?' Expediency asks the question, 'Is it politic?' Vanity asks the question, 'Is it popular?' But, conscience asks the question, 'Is it right?' And there comes a time when one must take a position that is neither safe, nor politic, nor popular but one must take it because one's conscience tells one that it is right." -Martin Luther King, Jr. (1929-1968) "The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom." -Isaac Asimov (1920-1992) "If in the last few years you haven't discarded a major opinion or acquired a new one, check your pulse. You may be dead." - Gelett Burgess (1866-1951) "You can judge your age by the amount of pain you feel when you come in contact with a new idea." - John Nuveen (1896-1968) “The scientific theory I like best is that the rings of Saturn are composed entirely of lost airline luggage.” - Mark Russell (1932- )

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Specifying of the filesystem3::path for custom strings using
by Iurii Gordiienko 05 Jul '11

05 Jul '11

Hi I tried to specify the boost::filesystem3::path to use my custom string (icu based) but in result I have error during my code compiling and I can't solve it... I have this issue under Linux, because under Windows ICU has equal with boost char-representation (wchar_t), but under Linux these values are different. The attach has error-screenshot and part of code which has conversion specification etc... Please, help Thanks -- Iurii Gordiienko

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weird Google page when I try to search boost.org
by Robert Ramey 05 Jul '11

05 Jul '11

http://www.google.com/custom?cof=LW%3A277%3BL%3Ahttp%3A%2F%2Fwww.boost.org%… I'm getting a weird response from google when i use the search box on the page www.boost.org. It says: We're sorry... ... but your computer or network may be sending automated queries. To protect our users, we can't process your request right now. See Google Help for more information. I've been getting for about two weeks. Originally I thought it was just a temporary thing. It hasn't gone away and now I'm wonder it if it's just me. I only get it when I use the boost.org search box. Anyone else get this? Robert Ramey

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Re: [Boost-users] weird Google page when I try to search boost.org
by Edward Rankin 05 Jul '11

05 Jul '11

On Tue, Jul 5, 2011 at 4:23 PM, <boost-users-request(a)lists.boost.org> wrote: > > From: Will Watts <willw(a)applied.co.uk> > To: boost-users(a)lists.boost.org > Date: Tue, 05 Jul 2011 09:23:36 +0100 > Subject: Re: [Boost-users] weird Google page when I try to search > boost.org > Me three. > > Will Watts > > > Not me. However, I am using https-everywhere extension with my firefox which gives me a https url. When I try it in IE, I get the same problem.

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Re: [Boost-users] [review][assign] Assign v2 review result
by er 04 Jul '11

04 Jul '11

> I would like to thank Erwann again for all his hard work, and everyone > who participated in the discussion during the review. > Likewise, I thank everyone who participated and will take their comments seriously, as summarized above. I also thank John very much for his outstanding job as a review manager. > John Bytheway > Review Manager > > _______________________________________________ > Unsubscribe& other changes: http://lists.boost.org/mailman/listinfo.cgi/boost >

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Boost::Serialization and MFC Doc/View architecture
by Colin Caprani 04 Jul '11

04 Jul '11

Hi All, I'm porting an existing MFC C++ application to use Boost::Serialization for XML files. My CDocument object contains all the data for the app. I've implemented the serialize function as: template<class Archive> void CMyDoc::serialize(Archive& ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(m_Param1) & BOOST_SERIALIZATION_NVP(m_Param2); } To capture the save and load events, in the CMyDoc.cpp file I have: BOOL CMyDoc::OnOpenDocument(LPCTSTR lpszPathName) { clear(); // clear current params //if (!CDocument::OnOpenDocument(lpszPathName)) // Old MFC serialize code // return FALSE; CEvolveTrafficDoc* pDoc = this; // pointers the same here std::ifstream ifs(lpszPathName); boost::archive::xml_iarchive ia(ifs); ia >> boost::serialization::make_nvp("MyDoc",pDoc); // pointer changes here return TRUE; } BOOL CMyDoc::OnSaveDocument(LPCTSTR lpszPathName) { //if (!CDocument::OnSaveDocument(lpszPathName)) // Old MFC serialize code // return FALSE; std::ofstream ofs(lpszPathName); boost::archive::xml_oarchive oa(ofs); oa << boost::serialization::make_nvp("MyDoc",this); return TRUE; } Saving a document works fine. The problem is that loading a document doesn't work. The boost library seems to copy the CMyDoc object because the pointer comes back a different address. This means that the loaded file isn't loaded into the current document. Can a CDoc overwrite itself with boost? It can with MFC CArchive. If I overload the CMyView to capture the file open and save events, the MRU list management offered by the Doc/View architecture won't happen. I'm sure this has been done a million times, but I can't find any information online. Weird! Any help much appreciated. Thanks, Colin

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using crypto++ with boost::wserialization
by Sean Farrow 04 Jul '11

04 Jul '11

Hi: I'm in the process of needing to encrypt a stream that I'm serializing to. Given that I'm using boost::wserialization to serialize classes, what is the best way of going about this, writing two separate streams to do the job, or writing stream filters? Fyi I'm planning on using Crypto++ has anybody already got streams/stream buffers that use this library? If I can use both approaches, what are the differences? I need to make the code as easy to read as possible. Any help appreciated. Cheers Sean.

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Boost.Python to-Python converter for class T already registered
by Tyler Weston 04 Jul '11

04 Jul '11

Hi All, I'm integrating a Boost.Python module into a Django project. I'm getting spammed with warnings for duplicate conversion methods. Django uses a multi-process model that loads separate copies of the python module into memory. The module does fine with multiprocess initialization. The warnings occur when, somehow, Django calls __init__ a second time on my module, within the same process. The warnings look like: C:\work\svn\sw\branches\python\imager\__init__.py:1: RuntimeWarning: to-Python converter for class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > already registered; second conversion method ignored. I have a few questions about this, as I am new to python. I thought that modules were supposed to be process-global. How do i enforce this and prevent __init__ from being called twice? Are the warnings benign? Should I be concerned about the state of my library static globals (ie is the compiled code going through a second initialization process)?

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