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Boost under Linux, invoking bootstrap
by Edward Diener 05 May '13

05 May '13

I am trying to get started using Boost under Linux in order to test my TTI library using the latest trunk. So first I try using bootstrap with: ./bootstrap.sh --prefix=~/bin It completes succesfully but nothing is put in my home bin subdirectory. Did I do something wrong ? Invoking ./b2 --help does seem to work.

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fusion io problem
by Olaf Peter 05 May '13

05 May '13

Hello, I run into the problem to provide ostream operator<< support for spirit's debug facility and for lazyness using fusion's io support: ---8<--- #include <boost/fusion/include/adapt_struct.hpp> #include <boost/fusion/include/io.hpp> #include <iostream> namespace fusion = boost::fusion; namespace client { struct point { int x,y; }; template<typename CharT> std::basic_ostream<CharT>& operator<<(std::basic_ostream<CharT>& os, point const& p) { os << p; return os; } struct arc { int radius; point begin; point end; }; template<typename CharT> std::basic_ostream<CharT>& operator<<(std::basic_ostream<CharT>& os, arc const& a) { os << a; return os; } } BOOST_FUSION_ADAPT_STRUCT( client::point, (int, x) (int, y) ) BOOST_FUSION_ADAPT_STRUCT( client::arc, (int, radius) (client::point, begin) (client::point, end) ) int main() { client::arc arc; std::cout << arc << '\n'; } --->8--- This program crashs, I would assume operator<<(..., arc) calls infinity recursive fusion's operator<< or similar - that's what I would interpret from gdb's backtrace. How to prevent this? I don't like to investigate much effort of formatting to supporting spirit's debug support and conventional debugging by tracing the selective printed output (like printf debugging) since there is support for formatted output of fusion sequences. Thanks, Olaf

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Call for Papers - Meeting C++ 2013
by Jens Weller 05 May '13

05 May '13

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Fwd: [BGL] wrapping bundled properties
by Sandeep Gupta 04 May '13

04 May '13

Hi, I have my own container and define a wrapper around it to make it behave like a BGL graph. Is it possible (and does it make sense) to define wrapper for bundled properties i.e. I want to control the storage of the bundled properties but want the expression to evaluate G[n].color = white As of now, I will just get an error operator [] not defined. It is quite that I just need to define operator [] for G. Thanks in advance for any suggestions. -Sandeep

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Access violation while deleting ssl socket
by Martinell, Dan F 03 May '13

03 May '13

I just upgraded the boost libraries from 1.43 to 1.53 and switched from a 32bit build to a 64bit build. The code worked fine before the upgrade but in 1.53 I am getting an out of access violation while trying to delete the sslSocket. Here is a sample of the code: ssl::stream<ip::tcp::socket>* sslSocket = (ssl::stream<ip::tcp::socket>*) NULL; sslSocket = new ssl::stream<ip::tcp::socket>(io_service, ctx); sslSocket->lowest_layer().connect(*endpoint_iterator, error); sslSocket->handshake(ssl::stream_base::client); sslSocket->shutdown(); delete sslSocket; //This throws the exception I also tried doing this and several variations of it but I still have the same issue: sslSocket->lowest_layer().cancel(); sslSocket->lowest_layer().shutdown(boost::asio::ip::tcp::socket::shutdown_both,EC); sslSocket->lowest_layer().close(); delete sslSocket; I read through the documentation and the examples but didn't see anything that describes how to do this properly. Does anyone know why this wouldn't work or the proper way to close the SSL connection? I can provide more of the code if that would be helpful. Thanks, Dan Martinell Application Security Boeing Information Security cell: 425-283-6712

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What ever happened to Boost.AutoBuffer?
by John M. Dlugosz 03 May '13

03 May '13

I recall some "detail" code in Boost that does exactly what I want: allocate a probably-good-enough size on the stack but switch to heap if needed. But I can't remember where I saw it. Looking around, I came across mentions of Boost.AutoBuffer by Thorsten Ottosen, but all links are dead.

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[BGL] graphviz imcompatible with dijkstra_shortest_paths
by YaoYuan 01 May '13

01 May '13

Hello, I try to use graphviz. But when I add "#include <boost/graph/graphviz.hpp>" to the example "http://www.boost.org/doc/libs/1_53_0/libs/graph/example/dijkstra-example.cpp", I get a compilation error. I use boost 1.53 and vs2012 express with command line option "/link libboost_graph-vc110-s-1_53.lib libboost_regex-vc110-s-1_53.lib". The error is about the deducation of template parameter of EdgeIndex boost::detail::get(const boost::detail::csr_edge_index_map<Vertex,EdgeIndex> &,const boost::detail::csr_edge_descriptor<Vertex,EdgeIndex> &) in "boost/graph/dijkstra_shortest_paths.hpp(140)". Thank you! Regards, YaoYuan

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[Intrusive] Obtaining end iterator from value reference
by Andrea Cuneo 01 May '13

01 May '13

Hi all, is it possible with boost::intrusive::slist to obtain the end() iterator from a value object present in a list? Using s_iterator_to() I can obtain a valid iterator from a value reference but i can't forward iterate from it without knowing the end(). Reading the slist code I found the method slist_iterator::get_container but since is a detail implementation, I prefer not to use it. I also found that a default construct iterator is almost equivalent to end() for linear slists and should work just fine. For circular slists? // snipped struct dummy : public slist_base_hook<> {}; typedef slist<dummy> MyList; void fn(dummy const& o) { MyList::const_iterator it = MyList::s_iterator_to(o); MyList::const_iterator e = ???; for (; it != e; ++it) { ... } } Regards, Andrea

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serialization of boost::shared_ptr to stl collection
by Andreas Mainik 01 May '13

01 May '13

Hello All, I have got the following warning 1>boost\boost_1_44_0\boost\mpl\print.hpp(51): warning C4308: negative integral constant converted to unsigned type 1> boost\boost_1_44_0\boost\serialization\static_warning.hpp(92) : see reference to class template instantiation 'boost::mpl::print<T>' being compiled 1> with 1> [ 1> T=boost::serialization::BOOST_SERIALIZATION_STATIC_WARNING_LINE<137> 1> ] 1> boost\boost_1_44_0\boost\archive\detail\check.hpp(137) : see reference to class template instantiation 'boost::serialization::static_warning_test<B,L>' being compiled 1> with 1> [ 1> B=false, 1> L=137 1> ] 1> boost\boost_1_44_0\boost\archive\detail\oserializer.hpp(453) : see reference to function template instantiation 'void boost::archive::detail::check_pointer_level<T>(void)' being compiled 1> with 1> [ 1> T=std::set<double> 1> ] during serialization of boost:shared_ptr<std::set<double>> (the same also e.g. for boost:shared_ptr<std::vector<double>>) My compiler is MS Visual Studio 2010. Boost version: 1.44 The serialization of std::set<double> (or std::vector<double>) works fine. What is wrong? Should the tracking really be changed to track_always? Kind Regards, Andreas

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New book by Christopher Kormanyos added to bibliography
by Paul A. Bristow 30 Apr '13

30 Apr '13

I have added a new book by Christopher Kormanyos to the bibliography section at http://www.boost.org/users/bibliography.html Christopher Kormanyos, Real-Time C++: Efficient Object-Oriented and Template Microcontroller Programming. http://www.springer.com/computer/communication+networks/book/978-3-642-3468… Uses C++11 including lambdas, templates, metatemplate programming for efficient programming for microcontrollers including use of Boost.Math, Boost.Regex, Boost.Multiprecision and other Boost libraries. I am sure that many Boosters will find this book interesting, even if they are not into Microcontrollers, because it makes interestingly full use of C++11 to do as much as possible at compile time. This is what everyone wants - not just for microcontrollers. Paul PS I noted during checking that: 1 We are not keeping this section up to date - tell me if you have any recent books that ought to be listed here. 2 I noted during validation of the hand-edited html that there were warnings about invalid attribute 'name'. This should be 'data-name' to be HTML5 compliant. Should I change all these occurrences? --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow(a)hetp.u-net.com

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