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How to detect thread kill?
by Samvel Khalatyan 02 Sep '11

02 Sep '11

Hi, There is a number of standard ways to interrupt thread from within an application with library tools. However, is there a way to detect if one of the running threads was killed with system tools and thread is not available any more? thanks, Samvel.

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[MultiIndex] cryptic gcc error
by Ovanes Markarian 02 Sep '11

02 Sep '11

Hello *, I try to use a multi_index container with a composite key. The container is defined as follows: struct index_data { entry_header header; //has various public fields one of them is timestamp_ fs::entry entry; bool masked; }; typedef size_t timestamp_t; //in reallity this type is a class, but the error can be reproduced with this typedef as well timestamp_t const& timestamp(index_data const& data) { return data.header.timestamp_; } bool mask_state(index_data const& data) { return data.masked; } struct entry_data_tag {}; typedef mi::multi_index_container < index_data, mi::indexed_by < mi::ordered_non_unique < mi::tag<entry_data_tag> , mi::composite_key < mi::global_fun<index_data const&, bool, &mask_state> //this could be a direct member reference, but I intially used fusion::map and reduced the problem to minimum , mi::global_fun<index_data const&, timestamp_t const&, &timestamp> > > > > entry_index; typedef entry_index::index<entry_data_tag>::type entry_data; void mask_all() { using namespace boost::lambda; entry_data& entries = pimpl_->indexed; entries.find(boost::make_tuple(false)); //!!!! this line results in an error novel by gcc 4.3 } The error description is: multi_index/composite_key.hpp:638: error: no match for 'operator*' in '*x' Does anyone have some suggestions why that happens? With Kind Regards, Ovanes

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[serialization] Export macro doesnt work
by Jari 02 Sep '11

02 Sep '11

Hi I was trying to use BOOST_CLASS_EXPORT for all my classes in order to save them but I always got unregistered class error. So I used oa.register_type<object>(); for the class that was causing the error and problem solved. But why doesnt the BOOST_CLASS_EXPORT macro work? Why I need to use oa.register_type<object>(); ? Im using Boost 1.46.1 Thanks

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complex matrix operations
by sairamesh raghuraman 02 Sep '11

02 Sep '11

Hello, I am looking for a C++ library that has routines for a variety of complex matrix decompositions (eigen, cholesky, singular value etc) and even complex matrix inverse, principal matrix logarthm of a complex matrix etc. And the matrices which I am talking are pretty huge..can go upto 1024 x 1024 x 32. I have already found a library that can do all of the above..used it..it works fine..but a disadvantage is that it cannot handle multidimensional arrays. Now the question is, does Boost C++ library have functions for the above? Looking forward to a reply and thanks in advance Ramesh

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[Program Options] notifiers for options with no value
by Dmitriy Matison 01 Sep '11

01 Sep '11

Hello, I'm wondering if there is a possibility to make program_options library to notify me automatically when option with no value is passed? As far as I understand this feature exists only for options with defined value_semantic. But this means I must permit passing a value for such options. Say, I make an option with zero_tokens() semantics so it can be passed without value and throw an error if some value was provided. Unfortunately, this doesn't solve the problem if you have positional options. In that case a positional option following a no-value option will be parsed as this option's value. I can't set notifier for options with no value? This is something not understandable. I even think of some patch to be added to the lib. Regards, Dmitriy.

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problem deserializing to base class pointer
by Shipa 01 Sep '11

01 Sep '11

I have a strange problem. I searched through the list and modified my initial code quite a bit but cannot seem to get this to work. Serialization seems fine, but deserialization to base pointer in particular doesn't seem to work correctly (I am getting instance of base class inside). The example below is canonical version of a much more complex case I was working with, involving shared_ptr and template classes, but it boiled down (for now) to this: A.h ---------------------------------------------------- #pragma once #include "boost/serialization/serialization.hpp" #include "boost/shared_ptr.hpp" class A { public: int t; A():t(0){}; //friend std::ostream& operator<<(std::ostream& os, const A& a); virtual ~A(){ }; friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & t; } }; std::ostream& operator<<(std::ostream& os, const A& a) { return os << "A: t = " << a.t << std::endl; } typedef boost::shared_ptr<A> APtr; ---------------------------------------------------- B.h ---------------------------------------------------- #pragma once #include "boost/serialization/serialization.hpp" #include "boost/shared_ptr.hpp" class B: public A { public: int m; B():A(),m(0){}; ~B(){}; //friend std::ostream& operator<<(std::ostream& os, const B& b); friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & boost::serialization::base_object<A>(*this); ar & m; } }; std::ostream& operator<<(std::ostream& os, const B& b) { return os << "B: t = "<< b.t << "; m = "<< b.m << std::endl; } typedef boost::shared_ptr<B> BPtr; ---------------------------------------------------------------- Test.cpp ---------------------------------------------------------------- #include "stdafx.h" #include "boost/shared_ptr.hpp" #include "boost/serialization/shared_ptr.hpp" #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/export.hpp> #include <istream> #include <ostream> #include <fstream> #include "A.h" #include "B.h" BOOST_CLASS_EXPORT(A) BOOST_CLASS_EXPORT(B) boost::archive::text_iarchive* GetiArchiveAndRegister(std::ifstream& f) { boost::archive::text_iarchive* ar= new boost::archive::text_iarchive(f); // ar->register_type(static_cast<A *>(NULL)); // ar->register_type(static_cast<B *>(NULL)); return ar; } boost::archive::text_oarchive* GetoArchiveAndRegister(std::ofstream& f) { boost::archive::text_oarchive* ar=new boost::archive::text_oarchive(f); // ar->register_type(static_cast<A*>(NULL)); // ar->register_type(static_cast<B*>(NULL)); return ar; } int _tmain(int argc, _TCHAR* argv[]) { A* a=new A(); a->t=1; B* b=new B(); b->t=2; b->m=1; A* c=new B(); c->t=2; std::ofstream f1("c:\\a"); boost::archive::text_oarchive* oa1=GetoArchiveAndRegister(f1); *oa1 & a; f1.close(); std::ofstream f2("c:\\b"); boost::archive::text_oarchive* oa2=GetoArchiveAndRegister(f2); *oa2 & b; f2.close(); std::ofstream f3("c:\\c"); boost::archive::text_oarchive* oa3=GetoArchiveAndRegister(f3); *oa3 & c; f3.close(); //deserializes fine std::ifstream f4("c:\\a"); boost::archive::text_iarchive* oa4=GetiArchiveAndRegister(f4); *oa4 & a; f4.close(); //deserializes an instance of A std::ifstream f5("c:\\b"); boost::archive::text_iarchive* oa5=GetiArchiveAndRegister(f5); *oa5 & a; f5.close(); //deserializes fine std::ifstream f6("c:\\c"); boost::archive::text_iarchive* oa6=GetiArchiveAndRegister(f6); *oa6 & a; f6.close(); //deserializes fine std::ifstream f7("c:\\b"); boost::archive::text_iarchive* oa7=GetiArchiveAndRegister(f7); *oa7 & b; f7.close(); std::ifstream f8("c:\\c"); boost::archive::text_iarchive* oa8=GetiArchiveAndRegister(f8); //runtime error: vector subscript out of range on the next line *oa8 & b; f8.close(); return 0; } ------------------------------------------------------------------ deserializations of f5 and f8 are controversial. I tried exchanging BOOST_CLASS_EXPORT calls with register_type call (commented out in GetiArchiveAndRegister and GetoArchiveAndRegister), and when that is done both serialization and deserialization finish correctly. I tried changing the order of includes, moving BOOST_CLASS_EXPORT around, etc. This version is what I'm settled for as the correct one. What am I doing wrong? Can anybody help?

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Re: [Boost-users] [Threads] How to keep number of running thread constant, performing different operations
by Alessandro Candini 01 Sep '11

01 Sep '11

I've tryed implementing your suggestions with the following code: #include <iostream> #include </usr/local/include/boost/asio.hpp> #include </usr/local/include/boost/thread/thread.hpp> #include </usr/local/include/boost/bind.hpp> #include </usr/local/include/boost/date_time/posix_time/posix_time.hpp> #include </usr/local/include/boost/scoped_ptr.hpp> void handler1() { unsigned short int i; std::cout << "O--> Handler 1 <--O" << std::endl; for(i=0; i<65000; i++); std::cout << "X--> Handler 1 <--X" << std::endl; } void handler2() { unsigned short int i; std::cout << "O--> Handler 2 <--O" << std::endl; for(i=0; i<1000; i++); std::cout << "X--> Handler 2 <--X" << std::endl; } int main() { unsigned short nProc, i; boost::asio::io_service io; boost::scoped_ptr<boost::asio::io_service::work> work(new boost::asio::io_service::work(io)); boost::thread_group tg; nProc = boost::thread::hardware_concurrency(); for(i=0; i<nProc; ++i) tg.create_thread(boost::bind(&boost::asio::io_service::run, boost::ref(io))); io.post(handler2); io.post(handler1); io.post(handler2); io.post(handler2); io.post(handler2); io.post(handler2); io.post(handler2); io.post(handler2); io.post(handler2); io.post(handler1); io.post(handler2); work.reset(); tg.join_all(); return 0; } It seems to work, but it is correct, in your opinion? The only problem is that it seems to never stop if I increase the value of i in handler1 up to 70000. Have you any other suggestions? -- Alessandro Candini MEEO S.r.l. Via Saragat 9 I-44122 Ferrara, Italy Tel: +39 0532 1861501 Fax: +39 0532 1861637 http://www.meeo.it ======================================== "ATTENZIONE:le informazioni contenute in questo messaggio sono da considerarsi confidenziali ed il loro utilizzo è riservato unicamente al destinatario sopra indicato. Chi dovesse ricevere questo messaggio per errore è tenuto ad informare il mittente ed a rimuoverlo definitivamente da ogni supporto elettronico o cartaceo." "WARNING:This message contains confidential and/or proprietary information which may be subject to privilege or immunity and which is intended for use of its addressee only. Should you receive this message in error, you are kindly requested to inform the sender and to definitively remove it from any paper or electronic format."

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[test] Organizing C++ Unit Test code for maximum Unit Test efficiency?
by Martin B. 01 Sep '11

01 Sep '11

Hi! Recently asked a questing on SE http://programmers.stackexchange.com/questions/105012/how-should-c-unit-tes… that boils down to How can C++ Unit Test code be effectively organized, so that it's both efficient to edit the (test) code and to run the test code? I figured this might be of interest to Boot.Test users. cheers, Martin

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[bind] deduce arguments types
by Martin Häfner 01 Sep '11

01 Sep '11

Hi all, I have written a small grammar for command line parsing where function binders could be added as actors (callback) of a distinct option. The simple example below shows that the free function id(...) is called if the option -i is getting parsed and the bound member function is called when -j is given: bool id(int i) { return true; /* if id satisfies some preconditions, the parser will evaluate the result value */ } struct Id { void id(int i) { // the parser will not evaluate the 'void' result value } }; Id ident; bool rc = cmdline::Parser<SomePolicyA, SomePolicyB, SomePolicyC> ::parse(argc, argv, cmdline::Option<'i'>().doc("an integer identifier")) >> id <= cmdline::Option<'j'>().doc("another integer")) >> boost:bind(Id::id, &ident, _1) ); The problem now is that I want to deduce the result type of the given actor as well as the argument type. Retrieving the result type is manageable with boost binders but I have no idea how I could retrieve the argument type in order to do a proper conversion from char* to int without the usage of make_adaptable<> which breaks the elegance of the binder usage at this point. My self-written binder class exposes appropriate typedefs so the writer of the parser grammar does not have to cope with all that 'magic' template stuff, but I cannot get a working solution for boost::bind nor do I get a working solution with tr1 binders. Maybe anybody could help or at least could explain me why the boost classes do not define these simple typedefs? Regards, Martin

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[serialization] deserializing asynchronously serialized types
by Andrew Hundt 01 Sep '11

01 Sep '11

I have an unusual use case for boost.serialization, and I was wondering if it would be possible to adapt it to my needs: - I have a set of over 100 types, and instances of each are generated asynchronously then serialized to a file in that order. - The most interesting serialized data will be written just before the power is unexpectedly cut. - I need to load in and run on as much data as possible when reading the serialized data back, ignoring incomplete data at the end (due to a power cut). - The basic Boost serialization examples require you to know the type of the next piece of data to be loaded when reading. Since these types are generated asynchronously they are not known in advance. - I need to write the data out immediately when it arrives because of the power issue. - Files will be getting up to around 150GB in size for binary archives, so it can't be marshaled in memory, it needs to be written immediately even if it is redundant. Is there a way to read in that serialized file using the facilities provided in boost.serialization? I could also serialize an index or custom headers indicating the next type to appear, I would prefer to avoid doing so. One way of achieving some of these goals is writing one piece at a time using a binary archive to an fstream. But I don't know what aspects of my requirements will prove to be a problem. Thanks for your thoughts. Cheers! Andrew Hundt

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[asio] sync operations with timeout
by Gennady Proskurin 31 Aug '11

31 Aug '11

Hello. I write network library which offers blocking socket operations (connect, read, write, ...) with timeouts, using boost::asio asynchronous operations as implementation. It is actually some sort of wrapper around boost::asio. Implementation does something like this (read, for example): do_read() { timer.async_wait(&handle_timer) socket.async_read(..., handle_read); wait_for_all_handlers(); deal_with_ec(); } handle_timer() { socket.cancel(); } handle_read() { timer.cancel(); } I have one io_service for all the sockets/timers with one thread doing io_service::run(). Code is multithreaded, so many threads run that functions like do_read() simultaneously (for different sockets, of course). I have two questions: 1. How to wait for completion of all handlers? Currently I use shared_ptr with mutex+condvar (for each library call), it works fine, but seems to be too heavy-weight. 2. There is a chance (with small timeouts), that timer expires before async_read() is started, so sock.cancel() is no-op in handle_timer(), and timer will be disabled. Currently, I just ignore this. I can use another mutex (or strand) to protect from this, but it is also heavy-weight.

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Re: [Boost-users] Reg : Boost Error - any.hpp
by Vijay 31 Aug '11

31 Aug '11

Hi, Below is the snippet code, class Fcif; class FcifNode { public: FcifNode (const string& val): value (val) {}; FcifNode (const Fcif& fcif): value (fcif) {}; FcifNode (const FcifNode& node): value (node.value) {}; FcifNode& operator= (const string& val) { value = val; return *this; }; FcifNode& operator= (const Fcif& val) { value = val; return *this; }; FcifNode& operator= (const FcifNode& val) { value = val.value; return *this; }; bool isValue () const { return (value.type () == typeid (string)); }; bool isFcif () const; type_info const& type () const { return value.type (); }; string& getValue () const; Fcif& getFcif () const; string toString () const; protected: any value; }; class Fcif: public map<string,FcifNode> { public: Fcif () { }; Fcif (const Fcif& fcif): map<string,FcifNode> (fcif) { }; Fcif (const string& fcifString); string getValue (string const& name, bool required = true) const; bool checkValue (string const& name, string& value) const; bool setValue (string const& name, string const& value, bool escapeIt = true); void setValue (Fcif const& fcif); bool removeNode (string const& name, type_info const& type = typeid (void)); bool removeValue (string const& name) { return removeNode (name, typeid (string)); }; bool removeAggregate (string const& name) { return removeNode (name, typeid (Fcif)); }; bool setAggregate (string const& name, Fcif const& fcif); Fcif* getAggregate (string const& name) const { // auto-append '|' to name as needed return const_cast<Fcif*>(this)->addAggregate ( name + ((name.empty () || name[name.size()-1] == '|') ? "" : "|") , false); }; string toString () const; void parseFcif (string const& fcifString); private: Fcif* addAggregate (string const& name, bool create = true); Fcif parsePreFcif (string::const_iterator begin_pos, string::const_iterator& end_pos); string extractTag (string const& name) const { string::size_type tagpos = name.find_last_of ('|'); return name.substr (tagpos == string::npos ? 0 : tagpos + 1); }; string extractAgg (string const& name) const { string::size_type tagpos = name.find_last_of ('|'); return name.substr (0, tagpos == string::npos ? 0 : tagpos); }; }; Regards, Vijay Can you please post at least a self-consisting code snippet which allows to reproduce it... Otherwise I doubt someone will help you with this... Best Regards, Ovanes On Sun, Aug 28, 2011 at 7:57 AM, Vijay <v2k.sweet_at_[hidden]> wrote: > > > > Hi, > > We are using boost version 1.31.0 in our C++ code. Our OS is HP-UX 11.31 > Itanium. We use aCC compiler. While compiling my code, I'm getting the below > error. Can any one help me to fix this issue ? > > "/opt/app/q1app2c4/boost-1.31.0/boost/any.hpp", line 125: error #2070: > incomplete type is not allowed > ValueType held; > ^ > detected during: > instantiation of class > "boost::any::holder<ValueType> [with ValueType=Fcif]" > at > line 32 > instantiation of "boost::any::any(const ValueType &) [with > ValueType=Fcif]" at line 35 of > "/opt/app/q1app2c4/src/share/incl/Fcif.h" > > > > > Cheers, > Vijay....(V2K) > E-mail to : v2k.sweet_at_[hidden] > Catch me @ 9962003328, 7871181610 > Blackberry PIN : 259943F3 > "Life is just one grand sweet song, so start the music."

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Compiling version 1.43 of boost/graph with SunCC 5.8
by Renaud Kauffmann 30 Aug '11

30 Aug '11

#include <boost/graph/adjacency_list.hpp> using namespace boost; typedef adjacency_list <vecS, vecS, undirectedS> BoostGraph; typedef graph_traits < BoostGraph >::vertex_descriptor vertex_t; int main() { BoostGraph g; vertex_t v1 = add_vertex(g); vertex_t v2 = add_vertex(g); vertex_t v3 = add_vertex(g); return 0; } The above code doesn't seem to compile with Sun Studio 11, that is Sun C++ compiler 5.8 and boost 1.43 Here is the error: "/home/renaudk/boost/boost_1_43_0/boost/unordered/detail/table.hpp", line 38: Error: Could not find a match for boost::unordered_detail::hash_table<boost::unordered_detail::T>::find_iterator<boost::unordered_detail::hash_table<boost::unordered_detail::T>::Key, boost::unordered_detail::hash_table<boost::unordered_detail::T>::Pred>(bucket_ptr, const boost::unordered_detail::Key&, const boost::unordered_detail::Pred&) const. "/home/renaudk/boost/boost_1_43_0/boost/unordered/detail/table.hpp", line 38: Error: Too many args in template, from boost::unordered_detail::Pred on ignored. "/home/renaudk/boost/boost_1_43_0/boost/unordered/detail/table.hpp", line 595: Error: Could not find a match for boost::unordered_detail::hash_table<boost::unordered_detail::T>::find(const boost::unordered_detail::Key&, const boost::unordered_detail::Hash&, const boost::unordered_detail::Pred&) const. "/home/renaudk/boost/boost_1_43_0/boost/unordered/detail/table.hpp", line 595: Error: Too many args in template, from boost::unordered_detail::Hash on ignored. 4 Error(s) detected. I have tried some of the switch I found in the forums such as -library=stlport4 -features=tmplife -features=tmplrefstatic But no luck. Does anybody know the trick ? Thanks.

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[MSM] Is there an elegant way to get the outermost FSM?
by Gábor Márton 30 Aug '11

30 Aug '11

Hi, I am having a statemachine with a submachine. In the internal submachine I need to check if there is a flag active in the outer statemachine. Currently I solve this with a const pointer to the outermost FSM passed to the submachine's constructor: backEnd.set_states(msm::back::states_ << StOk(msm::back::states_ << StSlave(&backEnd))); StSlave is the internal submachine in which I need to check whether a flag in StOk is active or not. Then I check the flag activity status e.g in a guard of StSlave like this: struct GrdBladeUp { template<class EVT, class FSM, class SourceState, class TargetState> bool operator()(EVT const& event, FSM& fsm, SourceState&, TargetState&) { if(fsm.getOutermostFSM()->template is_flag_active<FlagBladeUp>()) { return true; } return false; } }; Is there an easier way to get somehow the parent fsm or the outermost fsm of a submachine? Thanks, Gabor

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Re: [Boost-users] trouble with boost/random/poisson_distribution and large lambda
by Michael King 30 Aug '11

30 Aug '11

Thanks, I did realize that... much nicer api too. -mike On Aug 30, 2011 1:21 PM, "Steven Watanabe" <watanabesj(a)gmail.com> wrote: AMDG On 06/22/2011 03:49 PM, Michael King wrote: > Hello, > > I am new to the boost mailing list, so I ... poisson_distribution has been completely reimplemented in 1.47. This problem appears to be gone. I tested your code with MSVC 10 and the current trunk (r74137). > For example: > > <snip> > In Christ, Steven Watanabe

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trouble with boost/random/poisson_distribution and large lambda
by Michael King 30 Aug '11

30 Aug '11

Hello, I am new to the boost mailing list, so I apologize before hand if this is not the appropriate forum for this question. I have been using boost/random recently and have encountered what appears to be a problem with poisson variate generators with large lambda values. The random values can't seem to get much higher than 800 regardless of what value lambda is. For example: #include<iostream> #include<iterator> #include<vector> #include<algorithm> #include<boost/random/poisson_distribution.hpp> #include<boost/random/variate_generator.hpp> #include<boost/random/mersenne_twister.hpp> using namespace boost; using namespace std; int main() { mt19937 gen; double lambda = 1000.; poisson_distribution<int, double> pois(lambda); variate_generator<mt19937&, poisson_distribution<int, double> > rpois(gen, pois); // generate 10 random poisson variables vector<double> sample(10); generate(sample.begin(), sample.end(), rpois); cout << "Simulating from Poisson Random Variable with lambda=" << lambda << endl; cout << "\nSample: "; copy(sample.begin(), sample.end(), ostream_iterator<int>(cout, " ")); cout << "\n\nShouldn't the numbers be a little closer to 1,000?" << endl; return 0; } Thanks, Mike

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Reg : Boost Error - any.hpp
by Vijay 30 Aug '11

30 Aug '11

Hi, We are using boost version 1.31.0 in our C++ code. Our OS is HP-UX 11.31 Itanium. We use aCC compiler. While compiling my code, I'm getting the below error. Can any one help me to fix this issue ? "/opt/app/q1app2c4/boost-1.31.0/boost/any.hpp", line 125: error #2070: incomplete type is not allowed ValueType held; ^ detected during: instantiation of class "boost::any::holder<ValueType> [with ValueType=Fcif]" at line 32 instantiation of "boost::any::any(const ValueType &) [with ValueType=Fcif]" at line 35 of "/opt/app/q1app2c4/src/share/incl/Fcif.h" Cheers, Vijay....(V2K) E-mail to : v2k.sweet(a)gmail.com Catch me @ 9962003328, 7871181610 Blackberry PIN : 259943F3 "Life is just one grand sweet song, so start the music."

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asio - POSIX.4 Message Queues
by Hite, Christopher 30 Aug '11

30 Aug '11

Any chance of getting support for Posix Message Queues? http://www.users.pjwstk.edu.pl/~jms/qnx/help/watcom/clibref/mq_overview.html How do I make asio listen to a foreign file descriptor to do basic reactor style code? Is this still the way to do things with the posix queues? socket.async_read_some(null_buffers(), read_handler); On a unrelated note: The search feature on boost.org is broken by google. Could we hook it up to bing or yahoo if they don't fix it? Chris

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[units]
by Thomas Taylor 30 Aug '11

30 Aug '11

Could you please review the following patch for inclusion in boost::units? *WHY*: Obviously this only defines a conversion for boost::units::one to a numerical 1. When trying to convert at runtime (aiming for a runtime/dynamic unit instead of the compiletime/static unit provided) I use the following function: template <typename U1, typename U2> double unit_dispatch2t(U1 const& u1, U2 const& u2) { return bu::conversion_factor(u1,u2); } where U1 and U2 are boost::unit::unit derivatives. Without a conversion operator the compiler chickens out by claiming to not be able to convert boost::units::one to (in my case) double. The added conversion operator allows successfull compilation, thus allowing actual runtime units (my application needs to handle calculations where some units are known at compiletime and some only at runtime (e.g. the user wants the calculation to be done in meters or millimeters)). HTH, Thomas --- one.hpp 2011-08-30 09:50:13.000000000 +0200 +++ one2.hpp 2011-08-30 09:50:07.000000000 +0200 @@ -19,3 +19,3 @@ -struct one { one() {} }; +struct one { one() {} operator int() { return 1; } };

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[wave] Tracing a macro in a preprocessor directive
by Edward Diener 30 Aug '11

30 Aug '11

I was trying to trace the output of a macro within a preprocessor directive in a file using the Wave trace facility. The directive is: #elif BOOST_PP_ITERATION_FLAGS() == 1 so I specified: #pragma wave trace(enable) #elif BOOST_PP_ITERATION_FLAGS() == 1 #pragma wave trace(disable) But wave's trace showed me an empty file where the macro output ( -tsomefile ) should have been. Is there a way to capture the output of the BOOST_PP_ITERATION_FLAGS() macro at the point where the #elif is occuring using Wave's trace facility ?

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Asio does not compile
by Alessandro Candini 30 Aug '11

30 Aug '11

My code (simplyfication of this: http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/tutorial/tuttimer1…) #include <iostream> #include </usr/local/include/boost/asio.hpp> // Boost version 1.47.0 int main() { return 0; } Compilation command: g++ -Wall -o timer1 timer1.cpp Error: /tmp/ccGUgnoD.o: In function `__static_initialization_and_destruction_0(int, int)': timer1.cpp:(.text+0x52): undefined reference to `boost::system::generic_category()' timer1.cpp:(.text+0x5e): undefined reference to `boost::system::generic_category()' timer1.cpp:(.text+0x6a): undefined reference to `boost::system::system_category()' /tmp/ccGUgnoD.o: In function `boost::asio::error::get_system_category()': timer1.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[boost::asio::error::get_system_category()]+0x5): undefined reference to `boost::system::system_category()' /tmp/ccGUgnoD.o: In function `boost::asio::detail::posix_tss_ptr_create(unsigned int&)': timer1.cpp:(.text._ZN5boost4asio6detail20posix_tss_ptr_createERj[boost::asio::detail::posix_tss_ptr_create(unsigned int&)]+0x19): undefined reference to `pthread_key_create' /tmp/ccGUgnoD.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::task_io_service>::context>::~posix_tss_ptr()': timer1.cpp:(.text._ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_15task_io_serviceEE7contextEED2Ev[_ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_15task_io_serviceEE7contextEED5Ev]+0x15): undefined reference to `pthread_key_delete' /tmp/ccGUgnoD.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::asio::detail::strand_service::strand_impl>::context>::~posix_tss_ptr()': timer1.cpp:(.text._ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_14strand_service11strand_implEE7contextEED2Ev[_ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1_14strand_service11strand_implEE7contextEED5Ev]+0x15): undefined reference to `pthread_key_delete' collect2: ld returned 1 exit status make: *** [all] Error 1 Any ideas? Thanks in advance. -- Alessandro Candini MEEO S.r.l. Via Saragat 9 I-44122 Ferrara, Italy Tel: +39 0532 1861501 Fax: +39 0532 1861637 http://www.meeo.it ======================================== "ATTENZIONE:le informazioni contenute in questo messaggio sono da considerarsi confidenziali ed il loro utilizzo è riservato unicamente al destinatario sopra indicato. Chi dovesse ricevere questo messaggio per errore è tenuto ad informare il mittente ed a rimuoverlo definitivamente da ogni supporto elettronico o cartaceo." "WARNING:This message contains confidential and/or proprietary information which may be subject to privilege or immunity and which is intended for use of its addressee only. Should you receive this message in error, you are kindly requested to inform the sender and to definitively remove it from any paper or electronic format."

3 5

[Signals\Signals2] Move semantics
by Szymon Gatner 29 Aug '11

29 Aug '11

Hi, Any plans to do signals\signals2 movable? Just getting used to move things with great boost.move + boost.container libraries and being able to do same with signal-related code would be really nice as now the only way to deal with that is to keep signals on the heap which I find rather awkward. Cheers, Simon

4 6

why aren't I getting multithreaded versions of the libraries that need to be built?
by Ted Byers 29 Aug '11

29 Aug '11

This is in cygwin, using gcc. initially I used the following (I don't use python and don't have MPI, but wanted everything else): $ ./bootstrap.sh --with-libraries=chrono,date_time,exception,filesystem,graph,graph_parallel, iostreams,math,program_options,random,regex,serialization,signals,system,tes t,thread,wave ./b2 install I then tried building QuantLib, which makes extensive use of boost, including the test framework. But it failed because it tried linking to a multihtreaded build of the test frameqwork. I therefore tried the following, assuming that like make, it would just build and install those targets that had not been built the first time. $ ./bootstrap.sh --with-libraries=chrono,date_time,exception,filesystem,graph,graph_parallel, iostreams,math,program_options,random,regex,serialization,signals,system,tes t,thread,wave link=static link=shared threading=single threading=multi ./b2 install Unfortunately, it did not create the multithreaded build of the testframework that QuantLib requires. What did I miss that is preventing me from getting the multihtreaded builds of the required libraries? Thanks Ted

2 4

boost-style yaml parser
by Tim Blechmann 29 Aug '11

29 Aug '11

hi all, i wonder, does anyone have a boost-style parser for yaml? boost.propertytree lists yaml as one of the future parsers, has there been some progress on that? thanks, tim

2 1

Cannot get Wave + Spirit Compile
by Alexander Feldman 29 Aug '11

29 Aug '11

Hi, I have (I suppose) a beginner problem -- cannot make wave + spirit compile. I think there is an iterator problem but I cannot understand the compiler error. I am attaching a small example and the error output - can somebody explain how to fix this? I have searched around a lot but can't find an answer to that. Thanks, -- Alex

2 2

[math][tools][units] generic libraries not generic enough
by alfC 29 Aug '11

29 Aug '11

Hi, Lately I am using Boost.Units quite intensively for defining lots of thermodynamic functions. The other day I needed a root finding algorithm that can work on one of these functions. I look at couple of libraries,and I ended up rolling and adaptor that adimensionalizes the function on Boost.Units quantities, etc, etc. Then I though, hey! we have Boost.Math tools, even root finding algorithms, and these functions are *very* generic as Boost is supposed to be. And I found the function: boost::math::tools::bracket_and_solve_root which has the perfect underlying algorithm for the application. I started programming and after several compilation errors I realized that, as happened before, the functions are not generic enough. For example the arguments are bracket_and_solve_root( F f, const T& guess, const T& factor, bool rising, Tol tol, boost::uintmax_t& max_iter); in my case "guess" is an argument type of type boost::units::quantity<si::meter> but then "factor" has to be a *different* type. For this function to be generic one need that factor is of new type parameter. In my opinion the function should be template<typename F, typename T, typename Fact, typename Tol> bracket_and_solve_root( F f, const T& guess, const T& factor, bool rising, Tol tol, boost::uintmax_t& max_iter); to begin with (and then there is a chain of other internal changes). What do you think? should I open a bug ticket? Let's put it in more abstract way: T*T=T should not be a requirement for a root algorithm to work. Once and for all, can we give a name to the model type of which Boost.Units quantity models for? so the library writers stop assuming that T*T=T for numeric values and can improve half-way generic libraries? Other numeric libraries that suffer from this deficiency are Boost.Accumulators, Boost.Geometry, and Boost.Interval among the ones I tried. I think this issues should be addressed, not only to make them work with Boost.Units but also to bring those libraries to a higher level of generality. Just an opinion. Thank you, Alfredo

6 23

Regarding boost.python build on windows 7 (64 bit) VC9.0
by Nori Vasudeva Pavan Kumar 29 Aug '11

29 Aug '11

Hi I am trying to develop some python applications which use boost.python extensions. I am very new to both VC and Boost. I am able to compile boost.python following the help i found out in google. But I am not able to build my dll library linking with boost libraries. I am not able to figure out what and all going wrong. If I make it static library to be generated, the code builds but my python script is not able to import the library. Could you please direct me to a link where I can find solutions to all the problems regarding building and developing applications using boost.python. Regards, Vasudev

1 0

[chrono] using user + system process cpu time
by Julian Gonggrijp 28 Aug '11

28 Aug '11

Dear Chrono maintainers, Here's what I'd like to do: #include <boost/chrono.hpp> namespace bcr = boost::chrono; typedef bcr::process_cpu_clock clock; bcr::milliseconds foo ( ) { clock::time_point start = clock::now(); // run a test clock::time_point end = clock::now(); return (end.user() - start.user()) + (end.sys() - start.sys()); } However, it seems (from the manual) that bcr::process_cpu_clock doesn't provide an interface for retrieving the individual user and system components (except by passing it through a std::stringstream, but that's cumbersome). The only alternative that I can think of is to use bcr::process_user_cpu_clock and bcr::process_system_cpu_clock separately, like this: typedef bcr::process_user_cpu_clock uclock; typedef bcr::process_system_cpu_clock sclock; bcr::milliseconds foo ( ) { uclock::time_point ustart = uclock::now(); sclock::time_point sstart = sclock::now(); // run a test uclock::time_point uend = uclock::now(); sclock::time_point send = sclock::now(); return (uend - ustart) + (send - sstart); } But the latter approach is less elegant and I'm afraid that the result might be less reliable. Could you please advice me on the best way to find both the user and system components of the process cpu time taken by a piece of code? Thanks in advance, -Julian

2 2

[MSM] looking for a recursive get_state_name
by Jan Vogelgesang 28 Aug '11

28 Aug '11

Hello, i'am looking for a way to get the names(s) of the innermost active state(s) of a MSM with composite states, e.g. for debugging purposes. In my application i use state machines with orthogonal regions and submachines. Currently i use code based on the example given for fill_state_names, see http://www.boost.org/doc/libs/1_47_0/libs/msm/doc/HTML/re02.html#d0e5385 It works well for for orthogonal regions. For for submachines only the name of the active submachine is returned. Instead i want the name of the innermost active state in each submachine. I already found 'recursive_get_transition_table', this seems to be a first step. But i don't know how to get the state id's on the path to innermost active state. Unfortunately i don't know much about boost::mpl, thus i'am a bit lost at the moment. Any suggestions on how to get the state id's on the path to the innermost active state? Or on a different approach to get the name of the innermost active state? Best regards, Jan

2 1

[Boost][Test] Compile error with BOOST_REQUIRE_THROW
by Martin Desharnais 28 Aug '11

28 Aug '11

Hi, I've just found that we have a compiler error when using the BOOST_REQUIRE_THROW macro in a if/else statement with implicit block. Let's have an example: BOOST_AUTO_TEST_CASE(foo) { if(true) BOOST_REQUIRE_THROW(throw std::exception(), std::exception); else BOOST_REQUIRE_THROW(throw std::exception(), std::exception); } Will fail with: file.cpp: In member function ‘void foo::test_method()’: file.cpp:184:2: error: ‘else’ without a previous ‘if’ To make it work, we need to put explicit block: BOOST_AUTO_TEST_CASE(foo) { if(true) { BOOST_REQUIRE_THROW(throw std::exception(), std::exception); } else { BOOST_REQUIRE_THROW(throw std::exception(), std::exception); } } Wouldn't it be possible to add this block in the macro so library users don't have to care about? PS: Sorry for my writing, I'm not a native English speaker. -- Martin Desharnais martin.desharnais(a)gmail.com

2 1

Reg : Boost Error - any.hpp
by Vijay 28 Aug '11

28 Aug '11

Hi, We are using boost version 1.31.0 in our C++ code. Our OS is HP-UX 11.31 Itanium. We use aCC compiler. While compiling my code, I'm getting the below error. Can any one help me to fix this issue ? "/opt/app/q1app2c4/boost-1.31.0/boost/any.hpp", line 125: error #2070: incomplete type is not allowed ValueType held; ^ detected during: instantiation of class "boost::any::holder<ValueType> [with ValueType=Fcif]" at line 32 instantiation of "boost::any::any(const ValueType &) [with ValueType=Fcif]" at line 35 of "/opt/app/q1app2c4/src/share/incl/Fcif.h" Cheers, Vijay....(V2K) E-mail to : v2k.sweet(a)gmail.com Catch me @ 9962003328, 7871181610 Blackberry PIN : 259943F3 "Life is just one grand sweet song, so start the music."

2 1

language c
by Giordano Bruno 28 Aug '11

28 Aug '11

Does anyone recommend use boost preprocessor in c language for ARM development? Giordano

2 1

Debugging openssl server and asio
by Allan Nielsen 27 Aug '11

27 Aug '11

Hi I'm trying to hack cpp-netlib to implement a https server. I have used the ssl server example from boost 1.46.1 which is working okay, but when I (think) I do the same thing in cpp-net lib I got this segmentation fault: #0 0x00007ffff7bbda57 in SSL_accept () from /usr/lib64/libssl.so.1.0.0 #1 0x00000000004c1702 in boost::network::http::sync_connection<boost::network::http::tags::http_server, handler>::socket (this=0x4d58ca) at /home/awn/git/buildroot5/git/gmbinit/test/cpp-netlib-0.9.2/boost/network/protocol/http/server/sync_connection.hpp:50 #2 0x00000000004d4e67 in boost::detail::function::function_invoker1<int (*)(SSL*), int, SSL*>::invoke (function_ptr=..., a0=0x731820) at /usr/include/boost-1_46/boost/function/function_template.hpp:95 #3 0x00000000004d0fd6 in boost::function1<int, SSL*>::operator() (this=0x73b490, a0=0x731820) at /usr/include/boost-1_46/boost/function/function_template.hpp:1013 #4 0x00000000004cde2f in boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > >::start (this=0x73b490) at /usr/include/boost-1_46/boost/asio/ssl/detail/openssl_operation.hpp:149 #5 0x00000000004df1b3 in boost::_mfi::mf0<int, boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > > >::operator() ( this=0x7fffffffc500, p=0x73b490) at /usr/include/boost-1_46/boost/bind/mem_fn_template.hpp:49 #6 0x00000000004dd693 in boost::_bi::list1<boost::_bi::value<boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > >*> >::operator()<int, boost::_mfi::mf0<int, boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > > >, boost::_bi::list0> (this=0x7fffffffc510, f=..., a=...) at /usr/include/boost-1_46/boost/bind/bind.hpp:243 #7 0x00000000004db687 in boost::_bi::bind_t<int, boost::_mfi::mf0<int, boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > > >, boost::_bi::list1<boost::_bi::value<boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > >*> > >::operator() (this=0x7fffffffc500) at /usr/include/boost-1_46/boost/bind/bind_template.hpp:20 #8 0x00000000004d980e in boost::asio::asio_handler_invoke<boost::_bi::bind_t<int, boost::_mfi::mf0<int, boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > > >, boost::_bi::list1<boost::_bi::value<boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > >*> > > > ( function=...) at /usr/include/boost-1_46/boost/asio/handler_invoke_hook.hpp:64 #9 0x00000000004d7b22 in boost_asio_handler_invoke_helpers::invoke<boost::_bi::bind_t<int, boost::_mfi::mf0<int, boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > > >, boost::_bi::list1<boost::_bi::value<boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > >*> > >, boost::_bi::bind_t<int, boost::_mfi::mf0<int, boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > > >, boost::_bi::list1<boost::_bi::value<boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > >*> > > > (function=..., context=...) at /usr/include/boost-1_46/boost/asio/detail/handler_invoke_helpers.hpp:39 #10 0x00000000004d5990 in boost::asio::detail::completion_handler<boost::_bi::bind_t<int, boost::_mfi::mf0<int, boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > > >, boost::_bi::list1<boost::_bi::value<boost::asio::ssl::detail::openssl_operation<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> > >*> > > >::do_complete (owner=0x734c60, base=0x72fb80) at /usr/include/boost-1_46/boost/asio/detail/completion_handler.hpp:63 #11 0x00000000004ae40b in boost::asio::detail::task_io_service_operation::complete (this=0x72fb80, owner=...) at /usr/include/boost-1_46/boost/asio/detail/task_io_service_operation.hpp:35 #12 0x00000000004b3fb2 in boost::asio::detail::strand_service::do_complete (owner=0x734c60, base=0x7308e0) at /usr/include/boost-1_46/boost/asio/detail/impl/strand_service.ipp:98 #13 0x00000000004ae40b in boost::asio::detail::task_io_service_operation::complete (this=0x7308e0, owner=...) at /usr/include/boost-1_46/boost/asio/detail/task_io_service_operation.hpp:35 #14 0x00000000004b0449 in boost::asio::detail::task_io_service::do_one (this=0x734c60, lock=..., this_idle_thread=0x7fffffffc790) at /usr/include/boost-1_46/boost/asio/detail/impl/task_io_service.ipp:278 #15 0x00000000004aff97 in boost::asio::detail::task_io_service::run (this=0x734c60, ec=...) at /usr/include/boost-1_46/boost/asio/detail/impl/task_io_service.ipp:130 #16 0x00000000004b0841 in boost::asio::io_service::run (this=0x7fffffffc980) at /usr/include/boost-1_46/boost/asio/impl/io_service.ipp:57 #17 0x00000000004ac04b in main (arg=1, argv=0x7fffffffcb18) at /home/awn/git/buildroot5/git/gmbinit/test/serverTest.cxx:51 As the problem is in SSL_accept () i expect there is something wrong with my SSL context which I create like this: boost::asio::ssl::context context_(io_service, boost::asio::ssl::context::sslv23); context_.set_verify_mode(boost::asio::ssl::context::verify_none); context_.use_certificate_chain_file("/etc/ssl/gamblify/gamblify.cert"); context_.use_private_key_file("/etc/ssl/gamblify/gamblify.pem", boost::asio::ssl::context::pem); The context is created in my main function, and then passed around as a reference. The type of my socket is: boost::asio::ssl::stream<boost::asio::ip::tcp::socket> socket_; I create it like this: socket_(service_, context) Accept is using the lowest layer which I return like this boost::asio::ssl::stream<boost::asio::ip::tcp::socket>::lowest_layer_type& socket() { return socket_.lowest_layer(); } I call async_accept like this: new_connection.reset(new sync_connection<Tag,Handler>(service_, handler_, context_)); acceptor_.async_accept(new_connection->socket(), boost::bind(&sync_server_base<Tag,Handler>::handle_accept, this, boost::asio::placeholders::error)); The handler looks like this: void handle_accept(boost::system::error_code const & ec) { if (!ec) { new_connection->start(); new_connection.reset(new sync_connection<Tag,Handler>(service_, handler_, context_)); acceptor_.async_accept(new_connection->socket(), boost::bind(&sync_server_base<Tag,Handler>::handle_accept, this, boost::asio::placeholders::error)); } } Eventually the accept handler and it is running start which looks like this: void start() { std::cerr << "Running start" << std::endl; socket_.async_handshake(boost::asio::ssl::stream_base::server, boost::bind(&sync_connection<Tag,Handler>::handle_handshake, this, boost::asio::placeholders::error)); } Then at some point before I reach the handle_handshake I get an segmentation fault... Can any body see any problems with this, or just give some hints on how to debug this kind of bugs... -- Allan W. Nielsen

1 1

[MSM] How to use is_flag_active inside on_entry ?
by Gábor Márton 27 Aug '11

27 Aug '11

Hi, I would like to use is_flag_active<SomeFlag>() function inside one of my state's on_entry template function: struct StBladeDown : public msm::front::state<> { template<class Event, class FSM> void on_entry(Event const& event, FSM& fsm) { if(fsm.is_flag_active<FlagMaster>()) { // ERROR // doSomeThing(); } } }; However I got the following compile error: StOk.hpp: In member function 'void mr::mrd::amfo::StOk_::StBladeDown::on_entry(const Event&, FSM&)': StOk.hpp:78: error: expected primary-expression before '>' token StOk.hpp:78: error: expected primary-expression before ')' token However outside of the state machine, I mean if I first declare a state machine, I can use the is_flag_active: StAMFODirector backEnd; backEnd.start(); processEvent(backEnd,EvBladeDown()); processEvent(backEnd,EvMaster()); if(backEnd.is_flag_active<FlagMaster>()){ // OK _LOG_DEBUG("Flag Master active"); } If I use the front_end's is_flag_ I get compiler error again (no such function in msm::back::state_machine). Any idea how to use is_flag_active together with on_entry? Or if it is not possible are there any alternatives? Thanks for any help, Gabor

2 2

Re: [Boost-users] Simple serial port demonstration with boost asio asynchronous I/O
by jhodapp 27 Aug '11

27 Aug '11

Any reason why you can't use Ubuntu's package for Boost? Do you need the latest version of Boost? If you use the Ubuntu packages, you should have no issues as I was successfully able to run that example on my Ubuntu installation. On Aug 27, 2011, at 9:55 AM, drwho [via Boost] wrote: > New to boost. (Ubuntu 10.10) Downloaded boost 1.47 source. Built it with ./bootstrap.sh and ./b2 Keep getting linker failure, undefined reference to `boost::system::get_system_category() in my QT app. Tried your serial example from bash, same thing.... > > drwho@drwho-desktop:~/Projects/prog$ g++ -Lboost/stage/lib -lboost_system -lboost_thread serial.cpp -o test > /tmp/ccvTv9iN.o: In function `__static_initialization_and_destruction_0(int, int)': > serial.cpp:(.text+0x3cf): undefined reference to `boost::system::get_system_category()' > serial.cpp:(.text+0x3d9): undefined reference to `boost::system::get_generic_category()' > serial.cpp:(.text+0x3e3): undefined reference to `boost::system::get_generic_category()' > serial.cpp:(.text+0x3ed): undefined reference to `boost::system::get_generic_category()' > serial.cpp:(.text+0x3f7): undefined reference to `boost::system::get_system_category()' > /tmp/ccvTv9iN.o: In function `boost::system::error_code::error_code()': > serial.cpp:(.text._ZN5boost6system10error_codeC1Ev[boost::system::error_code::error_code()]+0x10): undefined reference to `boost::system::get_system_category()' > /tmp/ccvTv9iN.o: In function `boost::asio::error::get_system_category()': > serial.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[boost::asio::error::get_system_category()]+0x7): undefined reference to `boost::system::get_system_category()' > collect2: ld returned 1 exit status > > > If you reply to this email, your message will be added to the discussion below: > http://boost.2283326.n4.nabble.com/Simple-serial-port-demonstration-with-bo… > To unsubscribe from Simple serial port demonstration with boost asio asynchronous I/O, click here. -- View this message in context: http://boost.2283326.n4.nabble.com/Simple-serial-port-demonstration-with-bo… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

boost.log compilation
by asif saeed 27 Aug '11

27 Aug '11

Hi, I am having problems compiling boost.log. I am using Visual C++ 2010 Express. There is no project/solution file for VS2010. Perhaps I need to use bjam but executing "bjam Jamfile.v2" doesn't result in anything. Can you please give me a simple command for compiling boost.log for Visual C++ 2010 Express - 32-bit targeted at Windows Server 2003? I can read BJam docs but that'll take too much time - I need to compile boost.log urgently. Thanks in advance, Asif

1 0

Using boost unit test with QtCreator
by Wilhelm 26 Aug '11

26 Aug '11

Hi all, if one uses the boost unit test macros (see below), qtcreator marks the BOOST_CHECK(...) macros as syntax error (expected ;): #include <boost/test/unit_test.hpp> #include "person.h" BOOST_AUTO_TEST_CASE(Person1) { Person p("Hugo", "Tester"); BOOST_CHECK(p.firstname() == "Hugo"); BOOST_CHECK(p.lastname() == "Tester"); } Does anybody know how to avoid this (yes, I can use the Qt unit testing framework, but thats not a solution in this special case)? -- Wilhelm

3 4

[Containers] Marshalling deques
by Brian Wood 26 Aug '11

26 Aug '11

There's a thread here -- http://groups.google.com/group/comp.lang.c++/browse_thread/thread/0a6a19f83… that I'd like to mention. Does the deque in the Containers library have support for accessing the chunks it uses? Would you be willing to add a function that gives that? Tia. Shalom, Brian Wood Ebenezer Enterprises http://webEbenezer.net

4 5

asio tcp::resolver, service resolution
by Lloyd 26 Aug '11

26 Aug '11

Hi, In documentation I saw that using tcp::resolver::query constructor it is possible to resolve domain.name as well as service name, as shown in the following code fragment. boost::asio::io_service ios; boost::asio::ip::tcp::resolver resolver(ios); boost::asio::ip::tcp::resolver::query query("mydomain.com","myservice"); Here 'myservice' is not a well known service (port number). For resolving 'myservice' where should I add the port number? in my domain name server's (BIND) /etc/services file or in my local systems services file? Or is it 'really' possible to resolve a service name? Thanks, Lloyd

3 4

accumulator: serialization support
by Neal Becker 26 Aug '11

26 Aug '11

I have typedef accumulator_set<el_t,stats<tag::mean,tag::abs_sqr> > accum_t; How can I add serialization?

1 0

[qi][lambda] Get wrong reaction of the qi::rule if I use lambda for the action
by boost_mailinglist＠gmx.de 26 Aug '11

26 Aug '11

Hello, if I execute the following example, I get the following output "The bad one The good one a" but I only expected "The good one a". Why does it happens? Boost 1.47.0 was used. #include <boost/config/warning_disable.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/lambda/lambda.hpp> #include <iostream> int main() { using boost::spirit::qi::char_; using boost::spirit::qi::parse; char const *first = "{a}", *last = first + std::strlen(first); parse(first, last, '{' >> char_("a")[std::cout << "The good one " << boost::lambda::_1 << '\n'] | char_("b")[std::cout << "The bad one " << boost::lambda::_1 << '\n'] >> '}'); return 0; }

2 2

[boost::polygon::transform.hpp] Concatenation of transformations fails.
by Dimitris Dakopoulos 26 Aug '11

26 Aug '11

Hello to all, I want to apply to geometrical transformations (in this case translations) on a point. Point3D trans1(1,0,0); Point3D trans2(2,0,0); Point2D p(100,100); gtl::transformation<int> T1( trans1 ); gtl::transformation<int> T2( trans2 ); gtl::transform( p, T1 ); gtl::transform( p, T2 ); --- ... and the point's coordinates are (97,100) as expected. --- When I try to concatenate the transformations: Point3D trans1(1,0,0); Point3D trans2(2,0,0); Point2D p(100,100); gtl::transformation<int> T1( trans1 ); gtl::transformation<int> T2( trans2 ); gtl::transform( p, T1 + T2 ); --- ... and I get random numbers. I checked the boost/polygon/detail/transform_detail.hpp template <typename coordinate_type> inline const transformation<coordinate_type>& transformation<coordinate_type>::operator+=(const transformation<coordinate_type>& tr){ //apply the inverse transformation of this to the translation point of that //and convolve it with this translation point coordinate_type x, y, z; transformation<coordinate_type> inv = inverse(); inv.transform(x, y, z); p_.set(HORIZONTAL, p_.get(HORIZONTAL) + x); p_.set(VERTICAL, p_.get(VERTICAL) + y); p_.set(PROXIMAL, p_.get(PROXIMAL) + z); //concatenate axis transforms atr_ += tr.atr_; return *this; } ... and I noticed that the coordinate_type x, y, z; is not initialized and then the transformation is applied: inv.transform(x,y,z); which of course results to something random. Any ideas? Thank you for checking. Dimitris

3 3

[serialization] The famous non-const value trap
by cc caprani 26 Aug '11

26 Aug '11

Hi Boosters, I had the compile time warning discussed here ( http://boost.2283326.n4.nabble.com/Serialization-C4308-warning-with-MSVC9-t…) that Robert is probably fed up discussing. I've read for months, but didn't want to const_cast my object (or is it ok sometimes?). However, making my destructor virtual removed the warning. Here's my question: why does making the object destructor virtual remove the warning, effectively making my object instances const? And the section on this trap from the Rationale section of the Serialization documentation is not in the1.47 version (howcome?) but can be found in previous version here: http://www.boost.org/doc/libs/1_39_0/libs/serialization/doc/rationale.html#… Oh, and please forgive me if the answer is *obvious* - just an intermediate programmer. Colin

2 1

Subject: Re: [Containers] Marshalling deques
by Brian Wood 26 Aug '11

26 Aug '11

Michael Goldshteyn: > I think that having a ?configurable? deque class template > is one of the best things that could be offered by a boost > Containers library. I have always wondered why noone > wrote a version of the deque class template that allowed > the configuration of such things as the page / block size, > rather than have it be determined by a compile time > formula based on the size of the data type being stored. > It would seem to me that the page / block size is one of > the more critical pieces affecting the size / speed > tradeoffs in a deque?s performance when there are many > insertions taking place. The thread I mentioned has a link to a segmented_array container which may be of interest. I agree that what you suggest would be an improvement. Shalom, Brian Wood Ebenezer Enterprises http://webEbenezer.net <http://webebenezer.net/>

1 0

[filesystem] posix path on cygwin disappeared - how to make it work?
by Frédéric Bron 25 Aug '11

25 Aug '11

How can I use the posix path on cygwin? I am trying to upgrade from 1.43 but macros BOOST_POSIX_API and BOOST_POSIX_PATH are now deprecated. Why forcing WINDOWS_API while it worked well before? Regards, Frédéric

1 1

boost::mutex::scoped_lock fails with res = 22 (EINVAL)
by Andrej van der Zee 25 Aug '11

25 Aug '11

Hi, I am trying to understand why the acquiring of a lock fails on error code 22 (EINVAL). After Googling I find one of two causes: 1) The mutex was created with the protocol attribute having the value PTHREAD_PRIO_PROTECT and the calling thread's priority is higher than the mutex's current priority ceiling. The mutex is created by the main-thread and the lock is acquired by a thread from a boost::thread_group. But in many cases the lock is acquired without error, so I guess this is not the cause. 2) The value specified by mutex does not refer to an initialized mutex object. The mutex is default constructed by boost::mutex's constructor so I expect it to be initialized properly. Both causes *seem* not to apply to my case. What am I missing here? I am using boost 1.46.1 on Ubuntu amd64. Cheers, Andrej

1 0

Re: [Boost-users] [type traits] Extension to operator operatordetection -> choose your preferred naming
by Alex Perry 25 Aug '11

25 Aug '11

on Tue Aug 23 2011, Fr?d?ric Bron <frederic.bron-AT-m4x.org> wrote: > We have come to three proposed lists of names (A, B and C): > https://svn.boost.org/trac/boost/wiki/GuideLines/Naming/OperatorTraitN > ames I have included the corresponding names of standard keywords, > standard function objects from <functional>, boost Proto and boost > Operators. Another vote for C (though having done nothing on this not sure my vote really counts for anything) - only issue I have with C is :- has_negate surely has_unary_minus needs to be there as an alias for this at the very least. Alex

1 0

[Boost.Test]feature request to list testcase tree
by Tan, Tom (Shanghai) 25 Aug '11

25 Aug '11

I am a fan of Boost.Test. As a habbit, I organize my code this way: // file: Foo.h Class foo { // implementations }; #ifdef ENABLE_TEST namespace test_cases { BOOST_AUTO_TEST_CASE(foo_tests) { // test predicates of class foo } } //namespace test_cases #endif //end of file Foo.h With this structure, I can always carry test cases with any class I write, I just need to copy the file around. When I need to test it there is a universal test main.cpp //File test_main.cpp #define BOOST_TEST_MAIN #include <boost/test/unit_test.hpp> #define ENABLE_TEST #include "foo.h" //#include other includes //End of File test_main This pattern has helped me to use TDD easily. The only issue is that test cases are scattered among each header files. Usually I do not know exactly how many test cases/suites are included. If there is a {--list|-l } option to print a tree of registered test suites and test cases, so that one can quickly look them up here and filter the test cases to be run, it would be a great feature.

1 0

Boost.Serialization: Error on Calling Class Method during serialization process
by Hazrat Pradipta Ranjali 25 Aug '11

25 Aug '11

I have the following problem when I try to call method in "TestSerialize" class during serialization process. Here is my code: class TestSerialize { public: std::string GetVal() { return Val + "abc"; } void SetVal(std::string tVal) { Val = tVal.substr(0, 2); } protected: std::string Val; friend class boost::serialization::access; template<class Archive> void save(Archive & ar, const unsigned int version) const { using boost::serialization::make_nvp; std::string tVal = GetVal(); // Error here ar & make_nvp("SC", tVal); } template<class Archive> void load(Archive & ar, const unsigned int version) { using boost::serialization::make_nvp; std::string tVal; ar & make_nvp("SC", tVal); SetVal(tVal); } BOOST_SERIALIZATION_SPLIT_MEMBER(); }; int main() { TestSerialize tS; std::ofstream ofs("test.xml"); boost::archive::xml_oarchive oa(ofs, boost::archive::no_header); oa << BOOST_SERIALIZATION_NVP(tS); ofs.close(); return 0; } The error that I encountered is: 'TestSerialize::GetVal' : cannot convert 'this' pointer from 'const TestSerialize' to 'TestSerialize &' This error only happens on "save" but not "load" I wonder why I get this error. I would like to know what Boost.Serialization do such that we have these two different behaviors. I use Boost Library 1.47.0 Regards,

2 1

Re: [Boost-users] [Containers] Marshalling deques
by Brian Wood 25 Aug '11

25 Aug '11

Ion Gazta?aga: > >El 22/08/2011 19:44, Brian Wood escribi?: >> Would you be willing to add a function that gives that? Tia. > > Yes, I think we need to think about a useful interface for that, maybe > something like local_iterator in unordered containers or something like > segmented iterator described by Matt Austern in his "Segmented Iterators > and Hierarchical Algorithms" paper If I could get the number of elements in the first chunk and the size of the chunks, that would be sufficient. (I believe the size of the chunks is constant within a deque instance.) I find it disappointing that the latest version of the standard doesn't have anything related to this and would rather just get something working than figuring out what would be a flexible, general interface. Shalom, Brian Wood Ebenezer Enterprises http://webEbenezer.net

3 2

[build] cannot specify different version of gcc
by Brodie Thiesfield 25 Aug '11

25 Aug '11

Hi, I'm trying to build boost on CentOS 5.5 using the /usr/bin/gcc44 compiler and I'm running into difficulties with documentation not fitting reality. How do I make this work? What I've tried... Note: I've removed /usr/bin/gcc and /usr/bin/g++ to force errors when gcc44 and g++44 are not used. Using ./bootstrap.sh Building Boost.Jam with toolset ... tools/jam/src/### ### No toolset specified. Please use --toolset option. Setting CC=/usr/bin/gcc44 and CXX=/usr/bin/g++44 (note that this won't work if gcc and g++ exist because then it will default to the gcc toolkit and not the gcc-4.4 toolkit that I want). This builds a number of things (looking at the bootstrap.log) but still gives the following error. Ignoring the error and calling ./bjam then fails. Building Boost.Jam with toolset ... tools/jam/src/### ### No toolset specified. Please use --toolset option. Using ./bootstrap.sh --toolset=gcc gives an error: unrecognized option: --toolset=gcc Using ./bootstrap.sh --with-toolset=gcc gives an error: Building Boost.Jam with toolset gcc... Failed to build Boost.Jam -> bootstrap.log shows that it is trying to build with gcc, which doesn't exist, therefore error. Using ./bootstrap.sh --with-toolset=gcc-4.4 gives an error: Building Boost.Jam with toolset gcc... Failed to build Boost.Jam -> bootstrap.log shows ### Unknown toolset: gcc-4.4 Creating ~/user-config.jam as: import toolset.using ; using gcc : 4.4 : g++44 ; export BOOST_USER_CONFIG=~/user-config.jam Then calling the same ./bootstrap.sh command lines above show no difference. How in the world do I get this thing to use /usr/bin/gcc44 and /usr/bin/g++44 to compile? I think that I'm going to have to create local links ./gcc -> /usr/bin/gcc44 and add the current directory to the path just to get this to build the way that I want it to. This seems crazy. Regards, Brodie

3 3

Re: [Boost-users] [Containers] Marshalling deques
by Brian Wood 24 Aug '11

24 Aug '11

Ion Gazta?aga: El 24/08/2011 20:06, Brian Wood escribi?: >> >> If I could get the number of elements in the first chunk and the >> size of the chunks, that would be sufficient. (I believe the size >> of the chunks is constant within a deque instance.) > > Not necessarily, but I think all implementations do that. The question > is whether we should have a standard-friendly and implementation > agnostic interface or an interface just for boost::deque implementation. How about both? First a boost::deque implementation and then if someone is inclined to delve into this further a more general implementation that might replace the earlier implementation. Since this wasn't addressed by C++11, I'm not sure how long it will take to get attention. If the interface we come up with has weaknesses, someone else will figure out how to improve upon it. Regards, Brian Wood Ebenezer Enterprises http://webEbenezer.net

1 0

Boost::Test: Registering Positive and Negative Tests
by Jeffrey Walton 24 Aug '11

24 Aug '11

Hi All, Our project currently uses Boost ::Test and auto registers the tests with BOOST_AUTO_TEST_CASE. We have both positive an negative tests, and would like to register accordingly so we can selectively turn off negative tests (for example, turn of negative tests when running Valgrind due to Signal/Noise ratio). Is this supported? Jeff

2 1

[Boost.Signals] set_connection
by gast128 24 Aug '11

24 Aug '11

Hello all, I use the 'set_controlling' function for automatic disconnect when the connection goes out of scope. This is quite handy but not documented. Is it an implementation detail not to be used ordinary mortals or a small documentation mismatch? Also the reference section of the documentation mentions that scope_connection's are noncopyable but in fact u can just copy them (with all consequences). Is this a documentation overlook (I would think that marking them as noncopyable is safer). I use Boost 1.47

1 0

multi_array with large dimensions crashes
by Jothy 24 Aug '11

24 Aug '11

Hi all, I have just started to use boost libs. I am trying to create a large float array (mandatory for my purpose). it works fine till certain limit, but crashes above that. I think it about allocating memory in the stack. My code is like this typedef boost::multi_array<float,3> array_type; typedef array_type::index index; array_type Array(boost::extents[xDim][yDim][zDim]);//500,300,400 for instance Can some one help me to resolve this? Thanks Jothy

3 6

Re: [Boost-users] Boost.Serialization: Error on Calling Class Method during serialization process
by Alex Perry 24 Aug '11

24 Aug '11

Hazrat Pradipta Ranjali <mrdipta(a)gmail.com> wrote :- > I have the following problem when I try to call method in "TestSerialize" > class during serialization process. > > Here is my code: > > class TestSerialize > { > public: > std::string GetVal() { return Val + "abc"; } > void SetVal(std::string tVal) { Val = tVal.substr(0, 2); } GetVal() needs to be declared as const HTH Alex

1 0

[phoenix] Simple bind example not compiling
by Gabriel Redner 24 Aug '11

24 Aug '11

Hi all, I am trying to compile the phoenix::bind example partially laid out here: http://www.boost.org/doc/libs/1_47_0/libs/phoenix/doc/html/phoenix/modules/… The code, with #includes and using decls added, is: ========== #include <boost/phoenix/bind/bind_function.hpp> #include <boost/phoenix/core/argument.hpp> #include <iostream> using namespace boost::phoenix; using namespace boost::phoenix::placeholders; void foo(int n) { std::cout << n << std::endl; } int main() { bind(&foo, arg1)(4); } ========== However, the compiler (g++ 4.4.5) complains: /home/gredner/main.cpp: In function ‘int main()’: /home/gredner/main.cpp:16: error: no matching function for call to ‘bind(void (*)(int), const boost::phoenix::actor<boost::proto::exprns_::basic_expr<boost::proto::tag::terminal, boost::proto::argsns_::term<boost::phoenix::argument<1> >, 0l> >&)’ What am I doing wrong? I also tried fully-qualifying 'bind' and 'arg1', but got the same results. Also, there is no simple bind example under libs/phoenix/examples - in light of this sort of problem, it would be very nice to have one. Thanks, -Gabe

3 4

Program Options / Windows command line
by asif saeed 24 Aug '11

24 Aug '11

Hi, The page at http://www.boost.org/doc/libs/1_47_0/doc/html/program_options/howto.html#id… says that the "split_winmain function is a portable mechanism provided by the library." Does that mean that the same code (containing the split_winmain function, that is) will also run on Linux, for example? I guess it would return normal args on Linux. Could you elaborate please? In addition, could you please post a link to a cookbook-type recipe for parsing windows command-line (that parses linux/unix command line as well)? Are there any tutorials to get up to speed with program options - especially, the windows command-line parsing stuff? Best regards, Asif

1 0

[thread] boost::this_thread::get_id causing interrupt
by Yi Ding 24 Aug '11

24 Aug '11

Hi everyone, I've been dipping my toes into boost threads, and I'm running into a strange issue. What I'm trying to do is to run a comparison between thread_ids. I have an object that's "owned" by a thread, and when something calls one of its functions, I'd like to compare the thread_id to the owner's thread id. So I thought that boost::this_thread::get_id would do the trick to figure out what the current running thread's thread id is. For some reason, when I call it, an interrupt is signalled to my main thread. Is boost::this_thread::get_id not the right thing to use here? Thanks in advance, Yi

1 1

Boost.Conversion review
by Gordon Woodhull 23 Aug '11

23 Aug '11

Hi all, The review of Vicente Botet Escriba's Conversion library starts this Saturday August 20 and continues through August 29. This library provides a general system for type-to-type conversion. As such, it can be thought of either as a substitute for overloading static_cast, or as an alternative to lexical_cast when the intermediate conversion to text is not wanted. The code is in the sandbox: http://svn.boost.org/svn/boost/sandbox/conversion/ And the docs are here: http://svn.boost.org/svn/boost/sandbox/conversion/libs/conversion_ext/doc/h… I'll send out a formal announcement when the review begins, but I wanted to send out this reminder because participation in summer months tends to be somewhat low. Your review and/or discussion would be greatly appreciated. As always, please post to the main Boost list if possible, or the boost-users list, or you can send your review directly to the Review Managers. Thanks, Gordon Woodhull, Review Manager Espen Harlinn, Review Manager Assistant

3 2

Re: [Boost-users] [IOStream] issue
by Sean Farrow 23 Aug '11

23 Aug '11

Hi: I forgot to include the error in the last message. The error is: error C2039: 'category' : is not a member of 'std::basic_string<_Elem,_Traits,_Ax>' traits.hpp 242 1 Surface Reader visual studio 2010, windows 7.1 sdk. Cheers Sean.

1 0

[iostreams] issue
by Sean Farrow 23 Aug '11

23 Aug '11

Hi: I am writing some serialization code that uses IOStreams as a filter. The following is the class I am trying to serialize. class MIDISurface { public: // surface variables std::wstring strSurfaceName; }; The string header file is included. I then have a template function as follows: template <class SerializingType> void SaveData(SerializingType Data, boost::filesystem::path FileName, bool EncryptData) { //Check file existance. if (boost::filesystem::exists(FileName)) //Delete file boost::filesystem::remove(FileName); //Now create a WOfstream to serialize the data. std::wofstream OutputStream(FileName.generic_wstring()); //Create a filtering_stream to allow us to encrypt the data if necessary. boost::iostreams::wfiltering_stream<boost::iostreams::output> FilteringStream(FileName.generic_wstring()); if (EncryptData) //FilteringStream.push(test); //add the encryption filter defined in Encryption.hpp. FilteringStream.push(OutputStream); boost::archive::xml_woarchive Archive(FilteringStream); //create an archive and assign the filtering stream. Archive << BOOST_SERIALIZATION_NVP(Data); } I am including the following headers. //Standard c++ headers. #include <fstream> #include <stdlib.h> #include <string> #include <boost/iostreams/traits.hpp> //boost filesystem headers. #include <boost/config.hpp> #define BOOST_FILESYSTEM_VERSION 3 #include <boost/filesystem/operations.hpp> #include <boost/filesystem/path.hpp> //Boost xml serialization headers. #include <boost/archive/xml_wiarchive.hpp> #include <boost/archive/xml_woarchive.hpp> //Data type boost serialization headers. #include <boost/config.hpp> #include <boost/serialization/string.hpp> #include <boost/Serialization/Vector.hpp> #include <boost/Serialization/Map.hpp> #include <boost/Serialization/nvp.hpp> //boost io streams header. #include <boost/iostreams/detail/config/wide_streams.hpp> #include <boost/iostreams/concepts.hpp> #include <boost/iostreams/detail/ios.hpp> // BOOST_IOS. #include <boost/iostreams/filter/stdio.hpp> #include <boost/iostreams/operations.hpp> #include <boost/iostreams/filtering_stream.hpp> I am using boost 1.47, from the installer from boost pro computing. Can anyone point in the direction of the solution. Any help appreciated. Sean

1 0

[Serialization | Multi-Array] About the array.hpp header
by Júlio Hoffimann 23 Aug '11

23 Aug '11

Dear all, After read the "Optimizations" section of Boost.Serialization docs ( http://www.boost.org/doc/libs/1_47_0/libs/serialization/doc/special.html#op…) i get confused about the need to include/use array.hpp header with std::vector<>. I just need to include <boost/serialization/vector.hpp> and all is done, correct? Furthermore, i'm wondering if there is some header to include for serialize boost::multi_array<> class without doing myself the overload of the "array wrapper" and serialization member functions. Thanks in advance, Júlio.

1 0

Serialization: how to port binary archives containing NAN created with version 1.43 to version 1.47?
by Terry McLendive 23 Aug '11

23 Aug '11

Hi everyone, I am encountering a particularly gnarly version of the backward-compatibility problem with binary archives that others have discovered (here: http://groups.google.com/group/boost-list/browse_thread/thread/f4e3287f6925…, for example). Specifically, I have a number of binary archives created with version 1.43 of the library that are unreadable using version 1.47. I'd like to "port" them forward, so my initial plan was to compile a simple translator program against the 1.43 library that would read the binary archives and save them as (1.43) text archives. Then, a second program compiled against the 1.47 library would read the text archives and save them as (1.47) binary. Easy peasy. Except: the archives contain NAN values, which work fine when everything is binary but fail to deserialize for any version of the library when the archive is text (or xml, apparently), for reasons I don't quite understand. So my question is: how can I take my (1.43) binary archives containing NAN values and get them into a format readable by the current (1.47) version of the library? Is it possible? Thanks, Terry (An aside: it seems strange that I'm allowed to serialize a NAN to text, but it breaks when I try to deserialize it... why not prevent the creation of un-deserializable archives at the point of serialization?).

3 4

Valgrind Supression Settings
by Jeffrey Walton 23 Aug '11

23 Aug '11

Hi All, Does anyone have supression specs for Boost? We're getting overwhelmed with Boost squawks, and we are concerned Boost noise is drowning out problems with our gear. A small sample is below. For the full run, there are about 12,000 lines, mostly relating to Boost. Jeff ... ==8199== 24 bytes in 1 blocks are still reachable in loss record 147 of 999 ==8199== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261) ==8199== by 0x50D221C: boost::runtime::environment::rt_env_detail::new_var_record(boost::unit_test::basic_cstring<char const>) (new_allocator.h:89) ==8199== by 0x50D2A52: boost::runtime::environment::rt_env_detail::variable_data& boost::runtime::environment::rt_env_detail::init_new_var<bool, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char> >(boost::unit_test::basic_cstring<char const>, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char>) (environment.hpp:54) ==8199== by 0x50BDE39: T.6666 (environment.hpp:113) ==8199== by 0x50BDF63: boost::unit_test::runtime_config::show_build_info() (unit_test_parameters.ipp:395) ==8199== by 0x50B3E16: boost::unit_test::unit_test_log_t::test_start(unsigned long) (unit_test_log.ipp:140) ==8199== by 0x50A8623: boost::unit_test::ut_detail::callback0_impl_t<int, boost::unit_test::ut_detail::test_start_caller>::invoke() (framework.ipp:71) ==8199== by 0x509D51D: boost::execution_monitor::catch_signals(boost::unit_test::callback0<int> const&) (callback.hpp:118) ==8199== by 0x509D59A: boost::execution_monitor::execute(boost::unit_test::callback0<int> const&) (execution_monitor.ipp:1282) ==8199== by 0x50A5891: boost::unit_test::framework::run(unsigned long, bool) (framework.ipp:413) ==8199== by 0x50B4D42: boost::unit_test::unit_test_main(bool (*)(), int, char**) (unit_test_main.ipp:185) ==8199== by 0x475CC1: main (unit_test.hpp:59) ==8199== ==8199== 24 bytes in 1 blocks are still reachable in loss record 148 of 999 ==8199== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261) ==8199== by 0x50D221C: boost::runtime::environment::rt_env_detail::new_var_record(boost::unit_test::basic_cstring<char const>) (new_allocator.h:89) ==8199== by 0x50D2A52: boost::runtime::environment::rt_env_detail::variable_data& boost::runtime::environment::rt_env_detail::init_new_var<bool, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char> >(boost::unit_test::basic_cstring<char const>, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char>) (environment.hpp:54) ==8199== by 0x50BDE39: T.6666 (environment.hpp:113) ==8199== by 0x50BDFA3: boost::unit_test::runtime_config::catch_sys_errors() (unit_test_parameters.ipp:409) ==8199== by 0x50B7CF2: boost::unit_test::unit_test_monitor_t::execute_and_translate(boost::unit_test::test_case const&) (unit_test_monitor.ipp:63) ==8199== by 0x50A8940: boost::unit_test::framework_impl::visit(boost::unit_test::test_case const&) (framework.ipp:150) ==8199== by 0x50D7762: boost::unit_test::traverse_test_tree(boost::unit_test::test_suite const&, boost::unit_test::test_tree_visitor&) (unit_test_suite.ipp:207) ==8199== by 0x50A5C27: boost::unit_test::framework::run(unsigned long, bool) (framework.ipp:436) ==8199== by 0x50B4D42: boost::unit_test::unit_test_main(bool (*)(), int, char**) (unit_test_main.ipp:185) ==8199== by 0x475CC1: main (unit_test.hpp:59) ==8199== ==8199== 24 bytes in 1 blocks are still reachable in loss record 149 of 999 ==8199== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261) ==8199== by 0x50D221C: boost::runtime::environment::rt_env_detail::new_var_record(boost::unit_test::basic_cstring<char const>) (new_allocator.h:89) ==8199== by 0x50D2A52: boost::runtime::environment::rt_env_detail::variable_data& boost::runtime::environment::rt_env_detail::init_new_var<bool, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char> >(boost::unit_test::basic_cstring<char const>, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char>) (environment.hpp:54) ==8199== by 0x50BDE39: T.6666 (environment.hpp:113) ==8199== by 0x50BDFE3: boost::unit_test::runtime_config::auto_start_dbg() (unit_test_parameters.ipp:418) ==8199== by 0x50B7CFF: boost::unit_test::unit_test_monitor_t::execute_and_translate(boost::unit_test::test_case const&) (unit_test_monitor.ipp:65) ==8199== by 0x50A8940: boost::unit_test::framework_impl::visit(boost::unit_test::test_case const&) (framework.ipp:150) ==8199== by 0x50D7762: boost::unit_test::traverse_test_tree(boost::unit_test::test_suite const&, boost::unit_test::test_tree_visitor&) (unit_test_suite.ipp:207) ==8199== by 0x50A5C27: boost::unit_test::framework::run(unsigned long, bool) (framework.ipp:436) ==8199== by 0x50B4D42: boost::unit_test::unit_test_main(bool (*)(), int, char**) (unit_test_main.ipp:185) ==8199== by 0x475CC1: main (unit_test.hpp:59) ==8199== ==8199== 24 bytes in 1 blocks are still reachable in loss record 150 of 999 ==8199== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261) ==8199== by 0x50D221C: boost::runtime::environment::rt_env_detail::new_var_record(boost::unit_test::basic_cstring<char const>) (new_allocator.h:89) ==8199== by 0x50D2A52: boost::runtime::environment::rt_env_detail::variable_data& boost::runtime::environment::rt_env_detail::init_new_var<bool, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char> >(boost::unit_test::basic_cstring<char const>, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char>) (environment.hpp:54) ==8199== by 0x50BDE39: T.6666 (environment.hpp:113) ==8199== by 0x50BE023: boost::unit_test::runtime_config::use_alt_stack() (unit_test_parameters.ipp:427) ==8199== by 0x50B7D07: boost::unit_test::unit_test_monitor_t::execute_and_translate(boost::unit_test::test_case const&) (unit_test_monitor.ipp:66) ==8199== by 0x50A8940: boost::unit_test::framework_impl::visit(boost::unit_test::test_case const&) (framework.ipp:150) ==8199== by 0x50D7762: boost::unit_test::traverse_test_tree(boost::unit_test::test_suite const&, boost::unit_test::test_tree_visitor&) (unit_test_suite.ipp:207) ==8199== by 0x50A5C27: boost::unit_test::framework::run(unsigned long, bool) (framework.ipp:436) ==8199== by 0x50B4D42: boost::unit_test::unit_test_main(bool (*)(), int, char**) (unit_test_main.ipp:185) ==8199== by 0x475CC1: main (unit_test.hpp:59) ==8199== ==8199== 24 bytes in 1 blocks are still reachable in loss record 151 of 999 ==8199== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261) ==8199== by 0x50D221C: boost::runtime::environment::rt_env_detail::new_var_record(boost::unit_test::basic_cstring<char const>) (new_allocator.h:89) ==8199== by 0x50D2A52: boost::runtime::environment::rt_env_detail::variable_data& boost::runtime::environment::rt_env_detail::init_new_var<bool, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char> >(boost::unit_test::basic_cstring<char const>, boost::nfp::named_parameter<char, boost::nfp::nfp_detail::no_params_type_t, char>) (environment.hpp:54) ==8199== by 0x50BDE39: T.6666 (environment.hpp:113) ==8199== by 0x50BE063: boost::unit_test::runtime_config::detect_fp_exceptions() (unit_test_parameters.ipp:435) ==8199== by 0x50B7D0F: boost::unit_test::unit_test_monitor_t::execute_and_translate(boost::unit_test::test_case const&) (unit_test_monitor.ipp:67) ==8199== by 0x50A8940: boost::unit_test::framework_impl::visit(boost::unit_test::test_case const&) (framework.ipp:150) ==8199== by 0x50D7762: boost::unit_test::traverse_test_tree(boost::unit_test::test_suite const&, boost::unit_test::test_tree_visitor&) (unit_test_suite.ipp:207) ==8199== by 0x50A5C27: boost::unit_test::framework::run(unsigned long, bool) (framework.ipp:436) ==8199== by 0x50B4D42: boost::unit_test::unit_test_main(bool (*)(), int, char**) (unit_test_main.ipp:185) ==8199== by 0x475CC1: main (unit_test.hpp:59) ==8199== ==8199== 24 bytes in 1 blocks are still reachable in loss record 152 of 999 ==8199== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261) ==8199== by 0x50B7D4A: boost::unit_test::unit_test_monitor_t::execute_and_translate(boost::unit_test::test_case const&) (shared_count.hpp:87) ==8199== by 0x50A8940: boost::unit_test::framework_impl::visit(boost::unit_test::test_case const&) (framework.ipp:150) ==8199== by 0x50D7762: boost::unit_test::traverse_test_tree(boost::unit_test::test_suite const&, boost::unit_test::test_tree_visitor&) (unit_test_suite.ipp:207) ==8199== by 0x50A5C27: boost::unit_test::framework::run(unsigned long, bool) (framework.ipp:436) ==8199== by 0x50B4D42: boost::unit_test::unit_test_main(bool (*)(), int, char**) (unit_test_main.ipp:185) ==8199== by 0x475CC1: main (unit_test.hpp:59) ==8199== ...

1 0

[Review] Review results for Lockfree
by Hartmut Kaiser 23 Aug '11

23 Aug '11

All, The review for the Lockfree library written by Tim Blechman started July 18th 2011 and ended on July 28th. I counted 8 votes, none of which were NO. All authors votes YES, some made additional requests. Overall, the verdict of the community was clear: Tim Blechmann's Lockfree library is ACCEPTED The discussion was lively and it touched on several points. Design ------ The design of the library is sound, the API is usable. Except for naming issues (discussed below) almost no comments have been made on how to change it. People reviewing the library would like to see a more modular approach to lockfree data structures in general, possibly by exposing building blocks or by utilizing policies. The general interest was to have a more diverse set of data structures available, such as a lock-free linked list or bounded and fixed-sized data structures. Atomics Library --------------- As the initial review announcement stated, Lockfree depends on an external Atomics library, which has to be separately reviewed in order to get into Boost as a first class library. There has been some discussions whether Lockfree could be accepted without Atomics being reviewed. Others suggested Lockfree may be reviewed and added to Boost SVN only after Atomics got reviewed (this was mentioned in the review announcement as well). After all those discussions and based on the wide interest Lockfree data structures have, I'd suggest to add the current Atomics library as an implementation detail to Lockfree. Special handling of compilers which already have implemented std::atomics has to be added to Lockfree, though. In this case Lockfree should use the atomics from the stdandard library. Naming ------ The consensus was that the naming of the reviewed data structures has to be changed. The names should be either fifo and lifo or queue and stack. AFAIK, Tim already addresses this point. Documentation ------------- The consensus of almost everybody referring to the documentation was that it needs more work. Here is a short (but non-exhaustive) list of things being mentioned: - It lacks rationale and information about the implementation - The class synopsis of the data structures should be accessible from the "Reference" page. - Make non-thread-safe parts more explicit (fifo::empty is described as non-thread-safe) - Document exception guarantees - More information needed on internals, the design, and rationale I would like to thank all who participated in the discussions. Regards Hartmut --------------- http://boost-spirit.com

1 0

Custom services using boost::asio
by Allan Nielsen 22 Aug '11

22 Aug '11

Hi I would like to migrate an application from using Glib::Source (glibmm event loop) to use io_service instead. The application is using glib::sources for two job: - Drive lots of network IO connection - Process internal event which are generated in side the application it self. The Io part is easy to fit into asio, but I'm having problems seeing what the best way is to implement the core application event processing. Using glib::source I could register an interface where two function is called: bool prepare (int &timeout); bool dispatch (sigc::slot_base *slot); Prepare could set a time out identifying how much time should elapse before dispatch is ready to process an event. When the time is passed, the glib main loop will call the dispatch function, where I then can process the internal events. How can this be implemented in boost::asio io_service? I have look at the section 7.5 in http://en.highscore.de/cpp/boost/asio.htmlbut he is using a thread and a blocking call. Using a thread is not a solution in my case. I would rather like either polling, or some kind of scheduling... I any body has some hints, examples, advices it would be most appreciated. -- Allan W. Nielsen

2 1

[fusion]Is it possible to wrap a function template into a function object?
by someguy 22 Aug '11

22 Aug '11

If there is a function template: template<typename T> T f(T t); then f is not a type and cannot be passed to fusion::for_each() as the second argument. But I can't write fusion::for_each(someSequence,&f<SomeType>) either since elements of someSequence has different types. While I can write f as a functor fo struct fo{ template<typename T> T operator()(T t); }; and call fusion::for_each(someSequence,fo()), sometimes I need to use function templates in libraries ( say, I have a fusion::vector whose elements are ranges ) and the only solution seems to be writing a lot of functors to wrap the function templates. I tried to find a wrapper class template that can wrap arbitary function templates to functors in boost but I didn't find any. Then I tried to write such a wrapper using constructs like template<template<typename T0> class F>struct temp_fun_1; but the code made my MSVC2008 compiler crash(really!). Is there such a wrapper in boost or any other library, or is it even possible? -- View this message in context: http://boost.2283326.n4.nabble.com/fusion-Is-it-possible-to-wrap-a-function… Sent from the Boost - Users mailing list archive at Nabble.com.

5 7

[Containers Review Result] Boost.Containers is accepted into Boost.
by John Maddock 22 Aug '11

22 Aug '11

This is to announce that the Containers library by Ion Gaztanaga has been accepted into Boost. There were 11 positive reviews and one negative, many making the same points (see summary below). Acceptance is therefore conditional on Ion improving the documentation as the reviewers requested. Review comments summary: ~~~~~~~~~~~~~~~~~~~~~~~~ * Needs a better introduction/overview/tutorial in the docs: # what are stateful allocators, what's currently supported in this area, how is it supported, does it have performance implications. # Needs overview of the new containers - stable_vector, flat_* etc. # Needs description of recursive containers and why this library supports them but not C++03 containers. # Needs to justify why this library and not the std one (probably by mention of the above). * Make clear in the docs (if not already) what the default allocator is. * Make allocator template parameter name consistent. * Add basic_string::shrink_to_fit member function (from C++11). * Typo in range insertion docs (first/last vs i/j) * vector<bool> behavior needs to be documented (and justified either which way). * Need to document conformance to C++0x container requirements, plus use (or not) of new C++0x features such as std::allocator_traits. * Missing documentation for some deque member functions. * Missing Returns/Effects,Complexity or Throws. (ex: after No.23 in basic_string) * The "Acknowledgements" page is currently empty. There are various (c) notices in the source referring to sources from which parts of the code may have come. This page should clarify these sources, including any cases where the original code has now all been replaced, and assert that the licenses are all in order. It should also point out the history of the code in Boost, i.e. that parts were previously in Boost.Interprocess, so that anyone with previous exposure to the Interprocess containers is not confused. * There are some comments that the organisation of the docs makes it unnecessarily hard to jump directly to the info you want. Requests for additional features: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * Consider implementing std::forward_list from C++0x. * Consider Boost.Range interoperability and/or range insert support. * Make the flat_* containers container adapters - so that a) the user can choose the underlying implementation and b) they can shoot themselves in the foot if they want to by manipulating the underlying container (mostly for efficient loading of data). Alternatively, provide some other interface enhancements to try to meet most of the use cases given. * Efficient construction of ordered containers from already sorted data. * Investigate Clang's Libc++ std lib performance tests. John Maddock Containers review manager. PS: Ion: if you need any help with quickbook/docbook and AutoIndex ping me and I'll see what I can do to help - there are all sorts of parameters that can be used to tweak the appearance etc.

2 1

Problems matching parantheses in a string using boost::regex 1.42.0 on a amd64 debian system
by Simon Hoerder 22 Aug '11

22 Aug '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA224 Hi, I'm fairly new to boost libraries but searched the documentation and googled for an answer to my problem but couldn't come up with something. Please bear with me. I am using boost::regex (version 1.42.0 on debian amd64 machine) to parse a vhdl-like file. To this end, I am trying to use the regular expression boost::regex("^SIGNAL ([A-Z0-9_]*?): STD_LOGIC_VECTOR$ ([0-9]*?) DOWNTO ([0-9]*?)$;$"); to match strings like: SIGNAL W07: STD_LOGIC_VECTOR( 255 DOWNTO 0); My problem is that matching those parantheses in the string doesn't work - - I've tested the regexp under perl and it works fine but boost::regexp and C++ works only if I remove the brackets from the string and from the regular expression. Issues I observed & tested: 1) '$' ... '$' no match but g++ complains about an unknown escape sequence '\)'. 1a) Using '$' ... ')' doesn't match. (I would have expected an exception to be thrown but none whatsoever.) 2) '0x28' ... '0x29' doesn't match. (0x28 = ASCII '(', 0x29 = ASCII ')') 3) '\Q(\E' ... '\Q)\E' no match but g++ complains about an unknown escape sequence '\Q'. 4) If I try to match only one of the brackets and remove the other from the string & regex I get one of the following: '\(' ... gives me: terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::regex_error> >' what(): Found a closing ) with no corresponding openening parenthesis. The error occured while parsing the regular expression fragment: '?([0-9]*?)>>>HERE>>>);$'. ... '$' gives me: terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::regex_error> >' what(): Unmatched marking parenthesis ( or $. The error occured while parsing the regular expression fragment: '[0-9]*?);$>>>HERE>>>'. 5) Even boost::regex("^SIGNAL W07: STD_LOGIC_VECTOR\( 255 DOWNTO 0$;$"); fails to match SIGNAL W07: STD_LOGIC_VECTOR( 255 DOWNTO 0); Points 1a and 4 suggests that boost::regex treats even escaped parantheses as special characters which is quite surprising to me. I am sure a lot of people successfully used boost::regex to match parantheses so I do wonder which part of the documentation I have missed. I'd be happy to provide more debugging information if you tell me how to produce it. Many thanks, Simon Hoerder - -- /*** * Dipl. Ing. Simon Hoerder * Work: | Private: * Department of Computer Science | First Floor Flat * Merchant Venturers Building, 2.01 | 7 Whatley Road * Woodland Road | * Bristol, BS8 1UB | Bristol, BS8 2PS * United Kingdom | United Kingdom * * http://www.cs.bris.ac.uk/Research/CryptographySecurity/ * UK mobile: +44 7564 035925 * DE mobile: +49 179 7906117 * Skype: aloisius_hingerl ***/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iFYEARELAAYFAk5SilEACgkQE8ykjYCSVs7wGQDgmE795i+lC/qNHlwYVQvlxZtm SyiB7JreAuxQogDfUY0VLkfvNOcj9q41/43U5D8WxwljzL71+TkW2g== =wN0G -----END PGP SIGNATURE-----

2 2

[iterator] [iterator_facade] Why is advance not defined for bidirectional iterators?
by Ovanes Markarian 22 Aug '11

22 Aug '11

Hello *! I defined a custom bidi-iterator and assumed it was going to support std::advance(iterator, Difference n), where n can be negative for random access and bidirectional iterators. The definition of my iterator's facade base looks like: struct my_iter : boost::iterator_facade < my_iter , const byte , boost::bidirectional_traversal_tag , const byte > { // some impl stuff follows... }; My tests show that calling: advance(instance_of_my_iter, N) works fine (increment implementation is called) advance(instance_of_my_iter, -N) does not work, because increment (instead of decrement) is called as well While reading through the docs for iterator facade at http://www.boost.org/doc/libs/1_46_0/libs/iterator/doc/iterator_facade.html I found the section iterator_facade Core Operations. For the advance implementation is stated there that it is only gets called for Random Access Iterators. C++ Standard clearly defines that N-Parameter to std::advance can be negative to random access and bidi iterators. Implementing void advance member in my_iter still results in the call to increment member. Can someone give me any suggestions or is it a bug in the iterator lib? My compiler is gcc 4.3 under Debian Linux with Kernal 2.6.26. and Boost 1.42. With Kind Regards, Ovanes

2 5

[Bind] Unresolved overloaded function type
by Robert Jones 22 Aug '11

22 Aug '11

Hi All Can anyone tell me how to fix this? It's fine with one Fedora/Boost version combination, but not with another! #include <algorithm> #include <boost/bind.hpp> enum X { }; int main( ) { boost::bind<const X &>( std::max<X>, _1, _2 ); } > g++ -c a.cpp a.cpp: In function 'int main()': a.cpp:8: error: no matching function for call to 'bind(<unresolved overloaded function type>, boost::arg<1>&, boost::arg<2>&)' Thx - Rob.

2 2

[NEWBIE] [BGL] Compile error while using greedy graph coloring example v1.47.0
by Ragavendran Gopalakrishnan 22 Aug '11

22 Aug '11

Hello all, I'm a newbie to using Boost Graph Libraries for my project. I was reading the documentation, and tried implementing the greedy graph coloring algorithm that is presented in the following webpage: http://www.boost.org/doc/libs/1_47_0/libs/graph/doc/constructing_algorithms… I get compile errors involving the following lines of code: function_requires< IntegerConcept<ColorType> >(); function_requires< size_type, ReadablePropertyMapConcept<Order> >(); typedef typename same_type<OrderType, vertex_descriptor>::type req_same; I understand that the first two function_requires calls are concept checks, and I don't know what the use of the third line is, as req_same is never used. Anyway, if I comment these three lines, my program compiles fine, and works perfectly. I am unable to understand the errors and correct them. Here is my source code (coloring.cc) - the only change I made from the example algorithm is to pass color by reference, so that I can directly access the resulting coloring. 001. #include <iostream> 002. #include <map> 003. #include <limits> 004. #include <boost/concept_check.hpp> 005. #include <boost/graph/graph_traits.hpp> 006. #include <boost/graph/graph_concepts.hpp> 007. #include <boost/graph/adjacency_matrix.hpp> 008. #include <boost/property_map/property_map.hpp> 009. 010. using namespace boost; 011. 012. // Example coloring function provided in BGL online documentation at 013. // http://www.boost.org/doc/libs/1_47_0/libs/graph/doc/constructing_algorithms… 014. template <class VertexListGraph, class Order, class Color> 015. typename graph_traits<VertexListGraph>::vertices_size_type 016. sequential_vertex_color_ting (const VertexListGraph& G, 017. Order order, const Color& color) { 018. typedef graph_traits<VertexListGraph> GraphTraits; 019. typedef typename GraphTraits::vertex_descriptor vertex_descriptor; 020. typedef typename GraphTraits::vertices_size_type size_type; 021. typedef typename property_traits<Color>::value_type ColorType; 022. typedef typename property_traits<Order>::value_type OrderType; 023. 024. function_requires< VertexListGraphConcept<VertexListGraph> >(); 025. function_requires< ReadWritePropertyMapConcept<Color, vertex_descriptor> >(); 026. function_requires< IntegerConcept<ColorType> >(); 027. function_requires< size_type, ReadablePropertyMapConcept<Order> >(); 028. typedef typename same_type<OrderType, vertex_descriptor>::type req_same; 029. 030. size_type max_color = 0; 031. const size_type V = num_vertices(G); 032. std::vector<size_type> mark(V, std::numeric_limits<size_type>::max()); 033. 034. typename GraphTraits::vertex_iterator v, vend; 035. for (tie(v, vend) = vertices(G); v != vend ; v++) { 036. (*color)[*v] = V-1; // which means "not colored" 037. } 038. 039. for (size_type i = 0 ; i < V ; i++) { 040. vertex_descriptor current = order[i]; 041. 042. // mark all the colors of the adjacent vertices 043. typename GraphTraits::adjacency_iterator ai, aend; 044. for (tie(ai, aend) = adjacent_vertices(current, G) ; ai != aend ; ++ai) { 045. mark[(*color)[*ai]] = i; 046. } 047. 048. // find the smallest color unused by the adjacent vertices 049. size_type smallest_color = 0; 050. while (smallest_color < max_color && mark[smallest_color] == i) { 051. ++smallest_color; 052. } 053. 054. // if all the colors are used up, increase the number of colors 055. if (smallest_color == max_color) { 056. ++max_color; 057. } 058. 059. (*color)[current] = smallest_color; 060. } 061. return max_color; 062. } 063. 064. int main(int, char*[]) { 065. // Create adjacency matrix for a star graph on 5 vertices 066. int numberOfVertices = 5; 067. int adjacencyMatrix[numberOfVertices][numberOfVertices]; 068. for (int i = 0 ; i < numberOfVertices ; i++) { 069. for (int j = 0 ; j < numberOfVertices ; j++) { 070. if ((i == 0)||(j == 0)&&(i != j)) { 071. adjacencyMatrix[i][j] = 1; 072. } else { 073. adjacencyMatrix[i][j] = 0; 074. } 075. } 076. } 077. 078. // Construct boost graph 079. typedef adjacency_matrix<undirectedS> UGraph; 080. typedef graph_traits<UGraph> GraphTraits; 081. typedef GraphTraits::vertex_descriptor vertex_descriptor; 082. typedef GraphTraits::vertex_iterator vertex_iterator; 083. UGraph ug(numberOfVertices); 084. for (int i = 0 ; i < numberOfVertices ; i++) { 085. for (int j = i+1 ; j < numberOfVertices ; j++) { 086. if (adjacencyMatrix[i][j] == 1) { 087. add_edge(i,j,ug); 088. } 089. } 090. } 091. 092. // Create order as an externally stored property 093. vertex_descriptor order[numberOfVertices]; 094. std::pair<vertex_iterator, vertex_iterator> p = vertices(ug); 095. for (int i = 0 ; i < numberOfVertices ; i++) { 096. order[i] = *(p.first + i); 097. } 098. 099. // Create color as an externally stored property 100. std::map<vertex_descriptor, int> color; 101. for (int i = 0 ; i < numberOfVertices ; i++) { 102. color.insert(std::make_pair(vertex_descriptor(*(p.first+i)),int(0))); 103. } 104. 105. // Get the coloring 106. sequential_vertex_color_ting(ug,order,&color); 107. 108. // Display the coloring 109. for (int i = 0 ; i < numberOfVertices ; i++) { 110. std::cout << "Color of vertex " << i << " is " << color[*(p.first+i)] << std::endl; 111. } 112. 113. return 0; 114. } The command I used to compile is (g++ version 4.4.3): $ g++ -I ../../Desktop/boost_1_47_0/ coloring.cc The compiler output is: coloring.cc: In function ‘typename boost::graph_traits<G>::vertices_size_type sequential_vertex_color_ting(const VertexListGraph&, Order, const Color&)’: coloring.cc:27: error: wrong number of template arguments (1, should be 2) ../../Desktop/boost_1_47_0/boost/property_map/property_map.hpp:191: error: provided for ‘template<class PMap, class Key> struct boost::ReadablePropertyMapConcept’ coloring.cc:28: error: expected nested-name-specifier before ‘same_type’ coloring.cc:28: error: expected initializer before ‘<’ token In file included from coloring.cc:4: ../../Desktop/boost_1_47_0/boost/concept_check.hpp: In destructor ‘boost::Integer<T>::~Integer() [with T = std::map<long unsigned int, int, std::less<long unsigned int>, std::allocator<std::pair<const long unsigned int, int> > >]’: ../../Desktop/boost_1_47_0/boost/concept_check.hpp:65: instantiated from ‘static void boost::concepts::requirement<boost::concepts::failed************ Model::************>::failed() [with Model = boost::IntegerConcept<std::map<long unsigned int, int, std::less<long unsigned int>, std::allocator<std::pair<const long unsigned int, int> > > >]’ ../../Desktop/boost_1_47_0/boost/concept_check.hpp:45: instantiated from ‘void boost::function_requires(Model*) [with Model = boost::IntegerConcept<std::map<long unsigned int, int, std::less<long unsigned int>, std::allocator<std::pair<const long unsigned int, int> > > >]’ coloring.cc:26: instantiated from ‘typename boost::graph_traits<G>::vertices_size_type sequential_vertex_color_ting(const VertexListGraph&, Order, const Color&) [with VertexListGraph = main(int, char**)::UGraph, Order = main::vertex_descriptor*, Color = std::map<long unsigned int, int, std::less<long unsigned int>, std::allocator<std::pair<const long unsigned int, int> > >*]’ coloring.cc:106: instantiated from here ../../Desktop/boost_1_47_0/boost/concept_check.hpp:69: error: ‘class std::map<long unsigned int, int, std::less<long unsigned int>, std::allocator<std::pair<const long unsigned int, int> > >’ has no member named ‘error_type_must_be_an_integer_type’ When I comment lines 26-28, the program compiles successfully and executing a.out gives the following output, as expected: Color of vertex 0 is 0 Color of vertex 1 is 1 Color of vertex 2 is 1 Color of vertex 3 is 1 Color of vertex 4 is 1 Please advise me on what the compiler errors mean. I did try digging into some of the header files, but I couldn't find out what the mistake is. Regards, Raga.

2 1

[Boost.Build] Problem with the Boost library support module
by Marcel 21 Aug '11

21 Aug '11

Hi, I have compiled Boost.Buildv2 from the Boost V1.47 sources and have successfully compiled the Boost libraries with it. Now I want to use BBv2 in my own project, which uses the Boost libraries. So I tried using the Boost library support module: I added to my user-config.jam: using boost : 1.47 : <include>C:/boost_1_47_0/boost <library>C:/boost_1_47_0/stage/lib ; and to my project's jamroot file: import boost ; boost.use-project 1.47 ; I installed BBv2 to C:/boost_1_47_0/bjam and added this to the PATH. Calling bjam gives me the following error message, because it can't find the support module (I assume): boost.jam: No such file or directory C:/boost_1_47_0/bjam/share/boost-build/build\toolset.jam:38: in toolset.using rule boost.init unknown in module toolset. C:/boost_1_47_0/bjam/share/boost-build/build\project.jam:888: in using C:\Users\zaphod\user-config.jam:3: in modules.load C:/boost_1_47_0/tools/build/v2\build-system.jam:257: in load-config C:/boost_1_47_0/tools/build/v2\build-system.jam:399: in load-configuration-files C:/boost_1_47_0/tools/build/v2\build-system.jam:555: in load C:\boost_1_47_0\bjam\share\boost-build\kernel\modules.jam:283: in import C:\boost_1_47_0\bjam\share\boost-build\kernel\bootstrap.jam:142: in boost-build C:\boost_1_47_0\bjam\share\boost-build\boost-build.jam:8: in module scope I located boost.jam in the source tree of bbv2 of the boost libraries in the directory contrib. This is on Windows 7 x64 with mingw(32) as compiler. What is wrong here? Can I help bjam finding the boost.jam file? Many thanks in advance, Marcel

1 0

Serialization: how to port binary archives containing NAN created with version 1.43 to version 1.47?
by Robert Lupton the Good 21 Aug '11

21 Aug '11

>> Because of a user request we support serialization of nan and inf. >> The official boost archives don't, as you already found out. > Robert Ramey wrote: > I just looked at the page. It looks very interesting to me. When > I have some time, I will be investigating which of these might > be included in the boost distribution of the serialization library. Does this mean that you plan to support IEEE special values (e.g. NaN, Inf) in boost, or some other part of Christian's work? There's traffic on the IEEE limitation (feature?) in boost::serialize dating back to at least 2005 --- some with your name on it! R

2 1

[iostreams] encryption filters
by Sean Farrow 21 Aug '11

21 Aug '11

Hi: Has anybody written encryption filters for the IOStreams library using crypto++? I need to do this but didn't want to duplicate effort if any existed already. Cheers Sean.

1 0

[Serialization] Prevent member serialization in a non intrusive situation
by Sean Farrow 21 Aug '11

21 Aug '11

Hi: I am using boost.serialization, and need to prevent members (boost.thread, and Booleans) being serialized. Given that I am using non-intrusive serializing code, what is the best way of doing this. Any help appreciated. Cheers Sean.

1 0

boost 1.47.0 failed to be built under MinGW...
by JIA Pei 21 Aug '11

21 Aug '11

Hi, all: Happened to notice that boost 1.47.0 is out, therefore, I just downloaded boost_1_47_0.zip and would like to try it out . However, I wanna try to use MinGW to build boost this time. 1) I strictly followed http://www.boost.org/doc/libs/1_47_0/more/getting_started/windows.html 2) Also, I referred to http://cboard.cprogramming.com/windows-programming/126599-how-set-boost-up-… However I always obtain the following errors: > Failed to bootstrap the build engine Consult 'bootstrap.log' for more details In bootstrap.log, I had the following error messages: > builtins.c:32:23: fatal error: sys/wait.h: No such file or directory > compilation terminated. > execunix.c:17:26: fatal error: sys/resource.h: No such file or directory > compilation terminated. > fileunix.c:98:17: fatal error: ar.h: No such file or directory > compilation terminated. The reason seems to be in the current installed MinGW (the newest version), there seems to be no sys/wait.h sys/resource.h ar.h What's more, from http://patchwork.ozlabs.org/patch/74260/ it's suggested that "Don't use sys/wait.h for mingw targets" . It could be this reason that sys/wait.h is not included in current MinGW installation, which actually influence the current boost 1.47.0's bootstrap !!! Can anybody give me a hand on this? Cheers Pei -- Pei JIA Email: jp4work(a)gmail.com cell: +1 604-362-5816 Welcome to Vision Open http://www.visionopen.com

1 0

Boost Graph Very Strange Behavior
by Alexander Feldman 21 Aug '11

21 Aug '11

Dear All, I have upgraded to Boost 1.47.0 and I have spent a day on the following strange behavior that someone who knows Boost better may explain to me. Consider the source below. If I uncomment the line: //cout << ""; in line 39, then the program starts working, i.e., it outputs: 0x1 If I comment out line 39, then I get 0 There are no memory leaks. This kind of stuff gives me nightmares. Thanks for your help and sorry for the longish example. Thanks, -- Alex ----------------------------------------------------------------------- #include <boost/graph/adjacency_list.hpp> #include <iostream> using namespace boost; using namespace std; typedef adjacency_list<listS, listS, undirectedS, property<vertex_name_t, void *>, property<edge_name_t, void *> > GraphT; class Graph : public GraphT { public: Graph(); public: typedef graph_traits<GraphT>::vertex_descriptor VertexType; typedef graph_traits<GraphT>::edge_descriptor EdgeType; public: ostream &put(ostream &) const; void setNetLabel(const EdgeType &, void *); void addNet(const VertexType &, const VertexType &, void *); private: property_map<GraphT, edge_name_t>::type net_; }; Graph::Graph() { net_ = get(edge_name, *this); } void Graph::setNetLabel(const EdgeType &edge, void *label) { //cout << ""; net_[edge] = label; } void Graph::addNet(const VertexType &branch1, const VertexType &branch2, void *label) { EdgeType ei; bool inserted; tie(ei, inserted) = add_edge(branch1, branch2, *this); if (inserted) { setNetLabel(ei, label); } } ostream &Graph::put(ostream &out) const { graph_traits<GraphT>::edge_iterator ei, ei_end; for (tie(ei, ei_end) = edges(*this); ei != ei_end; ei++) { out << net_[*ei] << endl; } return out; } int main(int argc, char **argv) { Graph graph; Graph::VertexType v1 = add_vertex(graph); Graph::VertexType v2 = add_vertex(graph); graph.addNet(v1, v2, (void *)1); graph.put(cout); return EXIT_SUCCESS; } -----------------------------------------------------------------------

2 2

[serialization] : compile problem
by Kaz 20 Aug '11

20 Aug '11

Hi All, I am trying to compile this code to test boost serialization, however I am getting this error Error 5 error C2664: 'boost::mpl::assertion_failed' : cannot convert parameter 1 from 'boost::mpl::failed ************boost::serialization::is_wrapper<T>::* ***********' to 'boost::mpl::assert<false>::type' c:\program files (x86)\boost\boost_1_46_1\boost\archive\basic_xml_oarchive.hpp 92 I am using boost 1.46.1, visual studio c++ 2010 express. Any help will be appreciated. Thanks, Kaz //----------------------------------------------------------------------------------------------------------- #include <string> #include <boost/serialization/vector.hpp> #include <boost/serialization/list.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/tmpdir.hpp> #include <fstream> class Base { friend class boost::serialization::access; template<typename archive> void serialize( archive& ar, const unsigned int version ) { ar & BOOST_SERIALIZATION_NVP(a) & BOOST_SERIALIZATION_NVP(c) & BOOST_SERIALIZATION_NVP (strBase); } public: Base( int a_arg, char c_arg ) : a( a_arg ), c ( c_arg ) { strBase = "This is base"; } int a; char c; std::string strBase; }; //------------------------------------- BOOST_SERIALIZATION_ASSUME_ABSTRACT(Base) //------------------------------------- class Child : public Base { friend class boost::serialization::access; template<typename archive> void serialize( archive& ar, const unsigned int version ) { ar & boost::serialization::base_object<Base>(*this); ar & BOOST_SERIALIZATION_NVP(f) & BOOST_SERIALIZATION_NVP(strChildName); } public: Child() : Base(0,'c'), f(3.3417) { strChildName = "This is Child"; } float f; std::string strChildName; }; //------------------------------------- class BaseContainer { typedef Base* BasePtr; std::vector<BasePtr> BaseVec; friend class boost::serialization::access; template<typename archive> void serialize( archive& ar, const unsigned int version ) { ar.register_type<Base>(); ar.register_type<Child>() ; ar & BaseVec; } public: BaseContainer() {} void Init() { for(int i = 0; i < 10; ++i ) { if ( i < 5 ) BaseVec.push_back( new Base(i,'b') ); else BaseVec.push_back( new Child() ); } } }; //------------------------------------- int main() { std::string filename="demo.xml"; BaseContainer baseContainer; baseContainer.Init(); { std::ofstream ofile(filename); boost::archive::xml_oarchive out(ofile); out << BOOST_SERIALIZATION_NVP(baseContainer); } return 0; } //-------------------------------------

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Re: [Boost-users] Boost asio deadline_timer, bug?
by Marat Abrarov 20 Aug '11

20 Aug '11

Hi, Allan. > Is this a bug, or am I doing something wrong? Note that deadline_timer always (!) invokes wait handler, even it was successfully cancelled (int res = timer1.cancel(); assert(res > 0);): http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/reference/basic_de… ~~~ The handler for each cancelled operation will be invoked with the boost::asio::error::operation_aborted error code. ~~~ Regards, Marat Abrarov.

2 1

[review] Conversion review starts today
by Gordon Woodhull 20 Aug '11

20 Aug '11

Hi All, The review of Vicente Botet Escriba's Conversion library starts today and ends August 29. The Conversion library manages generic explicit conversion between unrelated types. It can be thought of as a substitute for overloading static_cast, or as an alternative to lexical_cast when conversion via text is unwanted. The code is available here: http://svn.boost.org/svn/boost/sandbox/conversion/ And the documentation is here: http://svn.boost.org/svn/boost/sandbox/conversion/libs/conversion_ext/doc/h… Alternately, you can download a compressed package here: https://github.com/viboes/TBoost.Conversion Reviews may answer the following questions: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Of course, "informal reviews" and discussion are also welcome. Cheers, Gordon Woodhull Espen Harlinn

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[boost] [review] Conversion review starts today
by Gordon Woodhull 20 Aug '11

20 Aug '11

Hi All, The review of Vicente Botet Escriba's Conversion library starts today and ends August 29. The Conversion library manages generic explicit conversion between unrelated types. It can be thought of as a substitute for overloading static_cast, or as an alternative to lexical_cast when conversion via text is unwanted. The code is available here: http://svn.boost.org/svn/boost/sandbox/conversion/ And the documentation is here: http://svn.boost.org/svn/boost/sandbox/conversion/libs/conversion_ext/doc/h… Alternately, you can download a compressed package here: https://github.com/viboes/TBoost.Conversion Reviews may answer the following questions: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Of course, "informal reviews" and discussion are also welcome. Cheers, Gordon Woodhull Espen Harlinn _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost

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Re: [Boost-users] [Containers Library Review] The review of the Containers library by Ion Gaztanaga starts today
by Ion Gaztañaga 20 Aug '11

20 Aug '11

El 17/08/2011 5:12, Edward Diener escribió: > I think the documentation is good, but it is hard to find overviews of > the separate containers. They are buried in the reference whereas I > would like to see them as separate topics in the TOC. It seems that documentation is the main issue of the review, I hope tools like autoindex will help me improve this and still maintain automatic reference documentation. > For the example in the "Emplace: Placement insertion" topic there is a > 'non_copy_movable ncm;' in the main function but it is never used, which > is confusing. I did get the idea of emplacement from the example and > understand what it is. Thanks for spotting this. > There is mention in the Introduction that "Containers support stateful > allocators" but that appears to be all that is written about that topic. > I would like to know what that is about. Ok, this has been already requested, I'll fix it. > The "Recursive Containers" topic gives a nice example but does not > explain what a recursive container entails and why a recursive container > is not guaranteed by the standard. Some further information should be > given in this topic. Ok > For all of the containers which have the same names as the std:: > containers, it should be pointed out what their benefits are. if it is a > matter of all those containers having move semantics, placement > insertion, recursive containers, and stateful allocators, that should be > mentioned. One would like to know why one should use the Containers > library containers rather than the std:: containers without having to > read the description of each container. Ok Best, Ion

3 6

boost::thread or openMP for low-latency multi-threading
by Jack Bryan 19 Aug '11

19 Aug '11

Hi, I am trying to do parallelization for a computing intensive problem. I am working on a Linux cluster where each node is a multicore processor. e.g. 2 or 4 quad-core processor per node. I want to reduce latency and improve performance as much as possible. I plan to use multiprocessing and multithreading at the same. Each process run on a distinct node and each process spawn many threads on each node. This is a 2 level parallelism. For multiprocessing, I would like to choose MPI. For multithreading, I have two choices: openMP or boost::thread (pthread). Which one has lower latency and higher performance ? It seems that openMP coding is easier (without touching low level thread managing manually). But, it seems that openMP has higher overhead than boost::thread (pthread). Any help is really appreciated. thanks

1 0

Scoped Pairs of functions?
by Brian Allison 19 Aug '11

19 Aug '11

Hi all, I'm on a project which uses a C++ compiler, but with a lot of C-isms. One of those is that there are objects with pairs of functions which allocate/deallocate resources. I don't have time to fix all of the design issues with the classes that do this (yet), but within one compilation unit I'd like to remove the chance for leaks. So - if I wanted to use boost types to wrap around 2 functions f() and g(), where each function - has a void or primitive return type - takes zero or 1 argument - where f() is called at some point in a scope, and then g() is called *on exiting the scope *from which f() is called and only if f() doesn't throw.. - has its return value ignored. [Gahh....] Is there a boost::bind (or lambda) expression that I can wrap in a type? I'm not adverse to using several template parameters. If it were just nullary functions I could just use: struct Reference {}; struct TypeWrapper{}; // Signify something like shared_ptr, a T which wraps around a pointer to an object of the type containing the functions, where T has a typedef value_type to refer to the wrapped type, and a get() to obtain a pointer to the wrapped pointer. template<class T, type R1, type R2, class P = Reference> struct ScopedDuals { typedef R1 (T::*f_t)(); typedef R2 (T::*g_t)(); ScopedDuals(T&t, f_t f, g_t g) : t_(t), g_(g) { (t_.f)(); } ~ScopedDuals() { (t_.*g_)(); } private: T& t_; g_t g_; }; template<class T, type R1. type R2> struct ScopedDuals<T, R1, R2, TypeWrapper> { typedef typname T::value_type Inner_t; typedef R1 (Inner_t::*f_t)(); typedef R2 (Inner_t::*g_t)(); ScopedDuals(T&t, f_t f, g_t g) : t_(t), g_(g) { (t_.get()->*f)(); } ~ScopedDuals() { (t_.get()->*g_)(); } private: T& t_; g_t g_; }; How do I generalize to include the possibility of a single argument? and.... does anyone have a better suggestion for a name than "ScopedDuals"? While *I *think it's precise, it may not be useful to my teammates. thanks, Brian

2 3

dynamically linked libraries looking for static libraries which don't exist
by Pally Sandher 19 Aug '11

19 Aug '11

I've built debug binaries of boost 1.47.0 on Windows with MSVC 10 using the following options b2.exe variant=debug link=shared threading=multi runtime-link=shared which as far as I understand should build dynamically linked libraries (which it does, I get a bunch of .lib files & .dll files as expected). However when I try to link some projects in Visual Studio 2010 which import boost_filesystem-vc100-mt-gd-1_47.lib & boost_system-vc100-mt-gd-1_47.lib I get the following errors 1>LINK : fatal error LNK1104: cannot open file 'libboost_filesystem-vc100-mt-gd-1_47.lib' & 1>LINK : fatal error LNK1104: cannot open file 'libboost_system-vc100-mt-gd-1_47.lib' I can stop these errors by using the /NODEFAULTLIB option on both those libraries but I would like to stop them in the first instance. Does anyone have any ideas why the libraries which should be dynamically linked are looking for statically linked libraries which don't exist? Palbinder Sandher Software Deployment Engineer T: +44 (0) 141 945 8500 F: +44 (0) 141 945 8501 http://www.iesve.com **Design, Simulate + Innovate with the <Virtual Environment>** Integrated Environmental Solutions Limited. Registered in Scotland No. SC151456 Registered Office - Helix Building, West Of Scotland Science Park, Glasgow G20 0SP Email Disclaimer

3 3

Starting...
by Giordano Bruno 18 Aug '11

18 Aug '11

Hi people, I want to use boost_pp in my embedded systems development using avr-gcc (C language). I was trying to understand how boostpp works, but it looks fuzzy to me. Can you explain me what is this "0" in the line 40 from preprocessor/comparison/less.hpp: define BOOST_PP_LESS_D(d, x, y) BOOST_PP_IIF(BOOST_PP_NOT_EQUAL(x, y), BOOST_PP_LESS_EQUAL_D, 0 BOOST_PP_TUPLE_EAT_3)(d, x, y) http://www.boost.org/doc/libs/1_43_0/boost/preprocessor/comparison/less.hpp thanks Giordano >

2 1

Re: [Boost-users] : dynamically linked libraries looking for static
by Alex Perry 18 Aug '11

18 Aug '11

Pally Sandher <pally.sandher(a)iesve.com> wrote on Thu, 18 Aug 2011 15:49:07 +0000 > > I've built debug binaries of boost 1.47.0 on Windows with MSVC 10 using the > following options > snip > I can stop these errors by using the /NODEFAULTLIB option on both those > libraries but I would like to stop them in the first instance. Does anyone have > any ideas why the libraries which should be dynamically linked are looking for > statically linked libraries which don't exist? Are you using the appropriate #define in your consuming code Eg #ifndef BOOST_REGEX_DYN_LINK #define BOOST_REGEX_DYN_LINK #endif #include <boost/regex.hpp> Which would ask to link to the dynamic link version of regex library not the static one - then all you need to do is make sure that the path to the boost libraries directory is added rather than having to add specific libraries Similar defines exist for the other libraries which are not header only. HTH Alex

1 0

Why is asio clobbering my file before it can be sent?
by Andrew Yancy 18 Aug '11

18 Aug '11

I've used the same boilerplate boost::asio code for years to send a plain text file "foo.txt" from a server back to a client and it has always worked fine. Suddenly for no apparent reason, the same code I've always used with no problems now deletes the contents of foo.txt before it can actually be sent to the client. I'm creating foo.txt with a different program now, but I don't see how that could make any difference on Win32. Below is the relevant part of the code just before I use boost::asio::write to send the contents of foo.txt back to the client. As shown by the two printf statements, the contents of the file are somehow lost when the file name and size are sent to the client. Anyone know what's going on? Is there any other information I can provide to shed light on the problem? Thanks very much for any help~ std::ifstream source_file("foo.txt", std::ios_base::binary | std::ios_base::ate); if (!source_file) return __LINE__; size_t file_size = source_file.tellg(); source_file.seekg(0); printf("foo.txt size: %d\n", (int) file_size); //size is OK here boost::asio::streambuf request; std::ostream request_stream(&request); request_stream << return_fn << "\n" << file_size << "\n\n"; boost::asio::write(socket, request); file_size = source_file.tellg(); printf("foo.txt size: %d\n", (int) file_size); //size is now 0!

3 4

[IOStreams] Is such a behaviour considered as bug
by Ovanes Markarian 17 Aug '11

17 Aug '11

Hello *, I really enjoyed working with Iostreams, while testing some of my components. Using IOStreams with array_device seemed to be a very powerfull approach to test some of my stream based algorithms. But currently I face some issues which seem to be really weired to me. I produced some code snippet to better explain it. I used Boost.Test library to verify my assumptions. using namespace boost; namespace io=boost::iostreams; typedef unsinged char byte; typedef array<byte, 2> arr_buffer; //boost::array typedef io::basic_array<byte> arr_dev; arr_buffer buffer_ = {{}}; arr_dev dev_(buffer_.begin(), buffer_.end()); io::stream<arr_dev> ios_(dev_); arr_dev::pair_type range = dev_.input_sequence(); BOOST_MESSAGE("size: " << distance(range.first, range.second)); // output: size is 2 BOOST_CHECK_EQUAL(0u, ios_.tellg()); //stream is at position 0 as expected ios_.seekg(1); BOOST_CHECK_EQUAL(1u, ios_.tellg()); // stream is at position 1 as expected ios_.seekg(2); BOOST_MESSAGE("current pos: " << ios_.tellg()); // !!! stream is at position 2 ios_.seekg(3); BOOST_MESSAGE("current pos: " << ios_.tellg()); // stream is at position -1 BOOST_MESSAGE("eof: " << ios_.eof()); // !!! but eof is false If the defined stream is only 2 bytes long why is 2 a valid stream position? Why is eof always false? Do you think this behavior is buggy? I changed the same behavior to read bytes from stream and created an array of length 3, but passed the range of 2 bytes to the device ctor. This works as expected: arr_buffer buffer_ = {{'a', 'b', 'c'}}; arr_dev dev_(buffer_.begin(), buffer_.begin()+2); //range of 2 bytes is passed io::stream<arr_dev> ios_(dev_); arr_dev::pair_type range = dev_.input_sequence(); BOOST_MESSAGE("size: " << distance(range.first, range.second)); byte bt; BOOST_MESSAGE("current pos: " << ios_.tellg()); // prints 0 BOOST_CHECK_EQUAL(0u, ios_.tellg()); ios_.read(&bt, 1); BOOST_MESSAGE("retrieved: " << bt); // prints 'a' BOOST_MESSAGE("current pos: " << ios_.tellg()); //prints 1 BOOST_CHECK_EQUAL(1u, ios_.tellg()); ios_.read(&bt, 1); BOOST_MESSAGE("retrieved: " << bt); // prints 'b' BOOST_MESSAGE("current pos: " << ios_.tellg()); // !!! prints 2, why not -1??? ios_.read(&bt, 1); BOOST_MESSAGE("retrieved: " << bt); // still prints 'b' => nothing retrieved BOOST_MESSAGE("current pos: " << ios_.tellg()); // !!! now it prints -1 BOOST_MESSAGE("eof: " << ios_.eof()); // !!! now eof is true Any ideas why it behaves as described? With Kind Regards, Ovanes

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[Date Time] format_date_parser.parse_date fails to compile with "treat wchar_t as builtin type" set to No
by Daniel Mitchell 17 Aug '11

17 Aug '11

Boost 1.47, using Visual Studio 2010 and Visual Studio 2008, with boost 1.47 both built myself from source and with boost from the boostpro installers. (and with boost 1.47 rebuilt myself with /Zwchar_t- in msvc.jam). If I set "treat wchar_t as builtin type" to "No", then the following code fails to compile: #include <boost/date_time/gregorian/gregorian.hpp> #include <boost/date_time/posix_time/posix_time.hpp> void parseDate() { std::locale locale; boost::date_time::format_date_parser<boost::gregorian::date, wchar_t> parser(L"", locale); boost::date_time::special_values_parser<boost::gregorian::date, wchar_t> svp; boost::gregorian::date date = parser.parse_date(L"", L"", svp); } It gives the following error: c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\lexical_cast.hpp(1116): error C2535: 'bool boost::detail::lexical_stream_limited_src<CharT,Base,Traits>::operator >>(unsigned short &)' : member function already defined or declared with [ CharT=char_type, Base=base, Traits=traits ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\lexical_cast.hpp(993) : see declaration of 'boost::detail::lexical_stream_limited_src<CharT,Base,Traits>::operator >>' with [ CharT=char_type, Base=base, Traits=traits ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\lexical_cast.hpp(1524) : see reference to class template instantiation 'boost::detail::lexical_stream_limited_src<CharT,Base,Traits>' being compiled with [ CharT=char_type, Base=base, Traits=traits ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\lexical_cast.hpp(1653) : see reference to function template instantiation 'Target boost::detail::lexical_cast<Target,src,false,char_type>(const std::basic_string<_Elem,_Traits,_Ax> &,CharT *,size_t)' being compiled with [ Target=short, _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t>, CharT=char_type ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\lexical_cast.hpp(1641) : while compiling class template member function 'short boost::detail::lexical_cast_do_cast<Target,Source>::lexical_cast_impl(const Source &)' with [ Target=short, Source=src ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\lexical_cast.hpp(1813) : see reference to class template instantiation 'boost::detail::lexical_cast_do_cast<Target,Source>' being compiled with [ Target=short, Source=src ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\date_time\format_date_parser.hpp(72) : see reference to function template instantiation 'Target boost::lexical_cast<int_type,std::basic_string<_Elem,_Traits,_Ax>>(const Source &)' being compiled with [ Target=short, int_type=short, _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t>, Source=std::basic_string<wchar_t,std::char_traits<wchar_t>,std::allocator<wchar_t>> ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\date_time\format_date_parser.hpp(365) : see reference to function template instantiation 'int_type boost::date_time::fixed_string_to_int<short,charT>(std::istreambuf_iterator<_Elem,_Traits> &,std::istreambuf_iterator<_Elem,_Traits> &,boost::date_time::parse_match_result<charT> &,unsigned int,const charT &)' being compiled with [ int_type=short, charT=wchar_t, _Elem=wchar_t, _Traits=std::char_traits<wchar_t> ] c:\users\danielm\downloads\boost_1_47_0\boost_1_47_0\boost\date_time\format_date_parser.hpp(254) : while compiling class template member function 'boost::gregorian::date boost::date_time::format_date_parser<date_type,charT>::parse_date(std::istreambuf_iterator<_Elem,_Traits> &,std::istreambuf_iterator<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Ax>,const boost::date_time::special_values_parser<date_type,charT> &) const' with [ date_type=boost::gregorian::date, charT=wchar_t, _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t> ] c:\source\dan\boost_wchar_t_test\boost_wchar_t_test\boost_wchar_t_test.cpp(18) : see reference to class template instantiation 'boost::date_time::format_date_parser<date_type,charT>' being compiled with [ date_type=boost::gregorian::date, charT=wchar_t ] If I set "wchar_t is builtin type" to Yes, then it compiles fine. Testing with #pragma message to verify things, BOOST_NO_INTRINSIC_WCHAR_T is defined (or not defined) appropriately depending on how I set that compiler option, so it looks as if Boost knows what's going on at that level. I've tried all the possible reconfigurations I can think of, but this error happens with the boostpro installs, with Boost built unchanged from the 1.47 distribution, and with Boost rebuilt with /Zwchar_t- set in msvc.jam. Is there a way to solve this? The issue originally appears when trying to build code from another library -- but this is a minimal repro it with just boost code, so I think it's a Boost problem, unless I'm missing something. thanks, -- dan

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Boost.Bimap vector_of element access VS 9 compilation errors
by John Eddy 17 Aug '11

17 Aug '11

Hello, I’m having difficulty figuring out how to access elements from a vector_of view in a bimap. The following code does not compile in VS 2008. #include <string> #include <iostream> #include <boost/bimap/bimap.hpp> #include <boost/bimap/vector_of.hpp> using namespace std; using namespace boost::bimaps; int main() { typedef bimap< string, vector_of<int> > bimap_type; bimap_type bm; bm.insert(bimap_type::value_type("zero", 0)); bm.insert(bimap_type::value_type("one", 1)); const bimap_type::right_map& right = bm.right; // Both of the lines below cause compilation failure with vc++ 9.0. bm.right[0]; //bm.right.at(0); return 0; } Can anyone see what I’m doing wrong or is there some other means of accessing the elements of the map via the vector? Thanks, John

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[thread] 1.47 on cygwin 1.7 -> undefined reference to boost::detail::set_tss_data::shared_ptr::tss_cleanup
by Frédéric Bron 17 Aug '11

17 Aug '11

I am trying to use boost 1.47 on cygwin 1.7 cross-compiling to win32 with i686-w64-mingw32-g++ (4.5.3). This program gives me an error: #include <boost/thread/tss.hpp> int main() { boost::thread_specific_ptr<int> ts; return 0; } $ i686-w64-mingw32-g++ -o mgw-release/obj/Tests/toto.o -c -O3 -DNDEBUG -Wall -Wextra -pipe -mthreads -I/cygdrive/d/Softs/1.7/mgw-release/boost/include -I. Tests/toto.cc In file included from /cygdrive/d/Softs/1.7/mgw-release/boost/include/boost/thread/detail/thread_heap_alloc.hpp:15:0, from /cygdrive/d/Softs/1.7/mgw-release/boost/include/boost/thread/tss.hpp:10, from Tests/toto.cc:1: /cygdrive/d/Softs/1.7/mgw-release/boost/include/boost/thread/win32/thread_heap_alloc.hpp:59:40: warning: inline function ‘void* boost::detail::allocate_raw_heap_memory(unsigned int)’ declared as dllimport: attribute ignored /cygdrive/d/Softs/1.7/mgw-release/boost/include/boost/thread/win32/thread_heap_alloc.hpp:69:39: warning: inline function ‘void boost::detail::free_raw_heap_memory(void*)’ declared as dllimport: attribute ignored $ i686-w64-mingw32-g++ -o mgw-release/bin/toto -O3 -DNDEBUG -Wall -Wextra -pipe -mthreads -I/cygdrive/d/Softs/1.7/mgw-release/boost/include mgw-release/obj/Tests/toto.o -Wl,--enable-auto-import -static -L/cygdrive/d/Softs/1.7/mgw-release/boost/lib -lboost_thread_win32 mgw-release/obj/Tests/toto.o:toto.cc:(.text+0x104): undefined reference to `__imp___ZN5boost6detail12set_tss_dataEPKvNS_10shared_ptrINS0_20tss_cleanup_functionEEEPvb' collect2: ld returned 1 exit status any help would be welcome. Regards, Frédéric

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[Regex | Xpressive] Efficiently "grepping" large files
by Thomas Luzat 17 Aug '11

17 Aug '11

Hello, I am looking into Boost.Regex and Boost.Xpressive for implementing grep-like functionality on large files. More specifically I want to check whether a file contains a match for an expression which does not need that much context (a few KB). regex_search and BidirectionalIterators for the whole file work, but there is a complication: I want to do other operations on the file in other threads in parallel (such as calculating hashes and extracting other data). Given that this is mostly I/O bound I would like to avoid rereading portions of the file as much as possible. My idea was to implement a circular buffer which may block the workers (and reading, if data is ever read faster than analyzed). The circular buffer needs to know when old data is no longer required, though, that is regex_search no longer works on it or backtracks into it. The best idea so far is to read blocks of data and do slightly overlapped calls of regex_search on those blocks. This approach has got at least two problems: 1) Matches and context are potentially limited to the size of the overlap. 2) Semantics of the match might be changed if I choose an arbitrary cut for the overlap (e.g. ^ and $ might change because I cut the beginning or end of a line) I would not mind to specify a maximum context of a few KB to maybe 1 MB, but I do not want to change semantics. Is there a better approach? I was thinking about supplying some intelligent iterators, but Regex/Xpressive might leave copies around longer than I anticipate, such that I still cannot decide where they are and how far they may still backtrack. If that's not really possible with the boost libraries I would be interested in alternatives, too. I am already considering looking into some grep implementations. Thanks in advance! Thomas Luzat

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cross-compiling didn't work with boost:filesystem
by rudy b 17 Aug '11

17 Aug '11

Hi, I developed a code on Linux, and the only library that I used was boost:filesystem. I was very happy with the code on Linux, and it never gave me a problem and never broke on me, I tried it on different scenarios and different file types, and I had never issue with boost::filesystem::remove(&path) function. But, now, I needed my code on a Mac machine (but I don't have a Mac) so I borrowed my friend's Mac, and installed xcode, and installed boost_1.47, and I didn't get a single error or warning when installing these packages. As a test, I even ran some simple filesystem examples that were provided. and they all passed. I even used the same "make" file that I had on linux, and it worked great on Mac. (no warnings when compiled) But, when I tried to run my code, I was getting errors with ::remove functions. I am not sure, but I think part of it was because I may have read-only permission on some of the files, and maybe that is why it complained, although I never had this problem in Linux. Also, another part of it could be because of the file naming with white space between its characters: (e.g. "my document.txt" because of this space). I don't know, but I thought that "boost::filesystem" should be independent of the developing platform, and that I could be fairly confident that if it works on one platform (Linux), it should be working on another one (Mac). Any idea, what I am doing wrong, and how this can be fixed? thanks, RB

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[Containers Library Review] The review of the Containers library by Ion Gaztanaga starts today
by John Maddock 17 Aug '11

17 Aug '11

The review of the containers library by Ion Gaztanaga starts today, to summarize the library: "Boost.Container library implements several well-known containers, including STL containers. The aim of the library is to offers advanced features not present in standard containers or to offer the latest standard draft features for compilers that comply with C++03. In short, what does Boost.Container offer? * Move semantics are implemented, including move emulation for pre-C++0x compilers. * New advanced features (e.g. placement insertion, recursive containers) are present. * Containers support stateful allocators and are compatible with Boost.Interprocess (they can be safely placed in shared memory). * The library offers new useful containers: o flat_map, flat_set, flat_multiset and flat_multiset: drop-in replacements for standard associative containers but more memory friendly and with faster searches. o stable_vector: a std::list and std::vector hybrid with random-access iterators that offers iterator stability in insertions and erasures. o slist: the classic pre-standard singly linked list container." Documentation from the library may be viewed online here: file:///M:/data/boost/sandbox/move/libs/container/doc/html/index.html The source may be accessed from the "move" directory of the sandbox SVN or downloaded from http://www.drivehq.com/web/igaztanaga/boost_container.zip. Note that this download contains a copy of the accepted, but not yet release, Boost.Move library - extract the zip over a copy of Boost-1.47 to get a full working copy. Review comments might like to answer the following questions: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Regards, John Maddock.

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ublas bug?
by Peter Man 17 Aug '11

17 Aug '11

Hi, I was just wondering if there is a bug in ublas (boost version 1.47): when I use the following code (in debug mode): ublas::matrix<double> m; ublas::matrix<double> m2; m2 = m; this compiles in MSVC 10, but produces a runtime error "Expression: invalid null pointer". I had a look at some of the underlying ublas code, and found that default initialisation of matrices makes the underlying data pointer "data_" be set to NULL, and that when one matrix is copied to another, std::copy is invoked to copy one data_ to the other. However, I looked at the MSVC std::copy definition, and it seems to check for NULLness of the pointers. The following link explains this in more detail: https://connect.microsoft.com/VisualStudio/feedback/details/558044/std-copy… On the plus side, I have no such problem when running the above code in linux. Thanks, Peter

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Simple inclusion of (1.47.0) filesystem.hpp generates compiler errors.
by Bill Moo 17 Aug '11

17 Aug '11

Hello Users, Qt v4.7.2 Boost v1.47.0. Intel Compiler v 12.0.1029.2010 Windows 7 Ultimate N x64 Building an x64 Release binary I have just included the boost/filesystem.hpp file in to my application and re-compiled only for the compiler to generate these errors. As yet I am not using any of the functionality of this I just included the file. Is this another Intel / MSVC STL issue? Sorry for the dump but without it I assume you won't be able to help. ..\Includes\boost/filesystem/v3/operations.hpp(126): error: expected either a definition or a tag name BOOST_SCOPED_ENUM_START(copy_option) ^ ..\Includes\boost/filesystem/v3/operations.hpp(127): error: expected an identifier {none, fail_if_exists = none, overwrite_if_exists}; ^ ..\Includes\boost/filesystem/v3/operations.hpp(127): error: expected a ";" {none, fail_if_exists = none, overwrite_if_exists}; ^ ..\Includes\boost/filesystem/v3/operations.hpp(150): error: identifier "copy_option" is undefined BOOST_SCOPED_ENUM(copy_option) option, // See ticket #2925 ^ ..\Includes\boost/filesystem/v3/operations.hpp(299): error: identifier "copy_option" is undefined BOOST_SCOPED_ENUM(copy_option) option) ^ ..\Includes\boost/filesystem/v3/operations.hpp(303): error: name followed by "::" must be a class or namespace name {detail::copy_file(from, to, copy_option::fail_if_exists);} ^ ..\Includes\boost/filesystem/v3/operations.hpp(306): error: identifier "copy_option" is undefined BOOST_SCOPED_ENUM(copy_option) option, system::error_code& ec) ^ ..\Includes\boost/filesystem/v3/operations.hpp(310): error: name followed by "::" must be a class or namespace name {detail::copy_file(from, to, copy_option::fail_if_exists, &ec);} ^ ..\Includes\boost/filesystem/v3/operations.hpp(642): error: expected either a definition or a tag name BOOST_SCOPED_ENUM_START(symlink_option) ^ ..\Includes\boost/filesystem/v3/operations.hpp(643): error: expected an identifier { ^ ..\Includes\boost/filesystem/v3/operations.hpp(643): error: expected a ";" { ^ ..\Includes\boost/filesystem/v3/operations.hpp(648): warning #12: parsing restarts here after previous syntax error }; ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: nonmember operator requires a parameter with class or enum type BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ The two errors above are repeated and repeated many times so I removed then to save bandwidth, space and time. ..\Includes\boost/filesystem/v3/operations.hpp(662): error: name followed by "::" must be a class or namespace name recur_dir_itr_imp() : m_level(0), m_options(symlink_option::none) {} ^ ..\Includes\boost/filesystem/v3/operations.hpp(678): error: name followed by "::" must be a class or namespace name if ((m_options & symlink_option::_detail_no_push) == symlink_option::_detail_no_push) ^ ..\Includes\boost/filesystem/v3/operations.hpp(678): error: name followed by "::" must be a class or namespace name if ((m_options & symlink_option::_detail_no_push) == symlink_option::_detail_no_push) ^ ..\Includes\boost/filesystem/v3/operations.hpp(679): error: name followed by "::" must be a class or namespace name m_options &= ~symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(682): error: name followed by "::" must be a class or namespace name || (m_options & symlink_option::recurse) == symlink_option::recurse)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(682): error: name followed by "::" must be a class or namespace name || (m_options & symlink_option::recurse) == symlink_option::recurse)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(737): error: identifier "symlink_option" is undefined BOOST_SCOPED_ENUM(symlink_option) opt = symlink_option::none) ^ ..\Includes\boost/filesystem/v3/operations.hpp(737): error: name followed by "::" must be a class or namespace name BOOST_SCOPED_ENUM(symlink_option) opt = symlink_option::none) ^ ..\Includes\boost/filesystem/v3/operations.hpp(747): error: identifier "symlink_option" is undefined BOOST_SCOPED_ENUM(symlink_option) opt, ^ ..\Includes\boost/filesystem/v3/operations.hpp(737): error: name followed by "::" must be a class or namespace name BOOST_SCOPED_ENUM(symlink_option) opt = symlink_option::none) ^ ..\Includes\boost/filesystem/v3/operations.hpp(761): error: name followed by "::" must be a class or namespace name m_imp->m_options = symlink_option::none; ^ ..\Includes\boost/filesystem/v3/operations.hpp(783): error: name followed by "::" must be a class or namespace name return (m_imp->m_options & symlink_option::_detail_no_push) ^ ..\Includes\boost/filesystem/v3/operations.hpp(784): error: name followed by "::" must be a class or namespace name == symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(802): error: name followed by "::" must be a class or namespace name m_imp->m_options |= symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(804): error: name followed by "::" must be a class or namespace name m_imp->m_options &= ~symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(988): error: namespace "boost::filesystem3" has no member "copy_option" using filesystem3::copy_option; ^ ..\Includes\boost/filesystem/v3/operations.hpp(1031): error: namespace "boost::filesystem3" has no member "symlink_option" using filesystem3::symlink_option; ^ -- Bill

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[Container] Forward declaration of movable types
by Szymon Gatner 17 Aug '11

17 Aug '11

Hi, I am evaluating container library by Ion Gaztanaga. I know it is not officially a part of boost yet but I didn't know where else to ask this question. My problem: If there is a movable class 'MyMovable' (I use boost.move) it can be stored without unnecessary copies in move-aware vector that is declared like so: vector<MyMovable> movables; which is very cool until this vector is suppose be a member of other class like: //widget.hpp class Widget { vector<MyMovable> movables_; }; which is not cool at all because now widget.hpp must include my_movable.hpp as opposed to just forward declaring it if it stored say vector<shared_ptr<MyMovable>> which in turn makes movability of MyMovable rather useless. I guess my question is: how can one take advantage of move semantics in context of member containers without adding unnecessary class dependencies? Regards, Simon

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