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Re: [Boost-users] Linking problem trying to use mutex, condition
by Brian Krahmer 15 Dec '07

15 Dec '07

So it turns out that I wasn't linking against the thread library. I assumed there wasn't a thread library (all implemented in headers) because when I tried to get it to build by doing 'bjam --with-libraries=regex,serialization,thread', it didn't do anything with thread. I then tried 'bjam --with-thread --with-regex --with-serialization', and that seems to work. BTW, I tried building using a parallel make (-j3), but there were errors in the build process. It appears perhaps there's a bug in the parallel compilation or the jamfile for thread. thanks, brian

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Interprocess documentation
by Stefan Funck 15 Dec '07

15 Dec '07

Hi, could someone please give a hint where to find the interprocess documentation? http://igaztanaga.drivehq.com/interprocess seems to be broken, also http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/interproces… as given in doc/html/interprocess.html from the current svn trunk does not work. thanks, Stefan

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Linking problem trying to use mutex, condition
by Brian Krahmer 15 Dec '07

15 Dec '07

I'm trying to compile a test program using the ReadWriteMutex example at http://paulbridger.net/read_write_lock, and I'm getting about 30 linking errors referring to mutex, lock_error and the like. I'm on an Ubuntu system, using boost 1.33.1. I'm including "boost/thread/mutex.hpp" and "boost/thread/condition.hpp". I can post more details, but was wondering if anybody was familiar with this problem. thanks, brian

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Can Lambda dynamic create template parameter？
by Guo Xu 15 Dec '07

15 Dec '07

I want to implement the grammar like this, to create template parameter dynamicly, set< int, ( _1 > _2 ) > intset; can lambda do it ,and how to ?

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[signals, MSVC8.1] Hang in signals constructor when upgrading from 1.33.1 to 1.34.1
by Kris Braun 14 Dec '07

14 Dec '07

Hi there, Trying to upgrade from 1.33.1 to 1.34.1 on Visual Studio 2005, I'm experiencing an infinite loop in the signals code. It happens when named_slot_map constructor calls groups.clear(), which ends up in some standard library iterator cleanup code (_Clean_up_iter_debug). It appears there's a circular link in some pointers to parents. This is happening on a debug build with both Boost and my project compiled with _HAS_ITERATOR_DEBUGGING=0. The problem does not appear on non-debug builds. The signals constructor is running inside the function below, which is called during C++ static initialization: static boost::signal< void( E& ) >& GetHandler( void ) { static boost::signal< void( E& ) > _Handler; return _Handler; } Does anybody have any idea what has changed between 1.33.1 and 1.34.1 that would cause this behaviour change? Thanks, Kris --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

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[Boost.MultiIndex] map by string and search by char*
by dariomt＠gmail.com 14 Dec '07

14 Dec '07

I'm trying to use Boost-MultiIndex to achieve: 1) the equivalent (or similar) functionality & performance of an std::map<std::string, ValType> with searches by std::string 2) perform searches by const char* without creating a temporary std::string and without copying the actual char's --------------------------code----------------------- #include <string> #include <functional> #include <cassert> #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/member.hpp> using namespace boost; using namespace boost::multi_index; struct elem { std::string m_key; double m_value; elem( const std::string& key, double value) : m_key(key), m_value(value) {} }; struct less_string : std::less<std::string> { using std::less<std::string>::operator(); // use operator< bool operator() (const std::string& lhs, const char* rhs) const {return lhs < rhs;} bool operator() (const char* lhs, const std::string& rhs) const {return lhs < rhs;} }; typedef multi_index_container< elem, indexed_by< ordered_unique< member<elem,std::string,&elem::m_key>, less_string > > > elem_set; int main() { elem_set s; s.insert( elem("p", 1.0) ); assert( s.find("p") != s.end() ); // no temporary and no data copy! I did it! return 0; } --------------------------code----------------------- Is this the right way to go? Any hint will be appreciated. TIA PS: I know I'm actually getting something more like a std::set, it's ok

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BGL support for graphml
by abhishek.v＠tcs.com 14 Dec '07

14 Dec '07

Hi.. I have downloaded the graphml.cpp, graphml.hpp, reader_test.cc and the test xml file. To check whether the code posted by Tiago on http://article.gmane.org/gmane.comp.lib.boost.devel/146836 to see if it is working fine or not. I m able to build the project and link the libraries of expat as well in Dev-Cpp. But while executing the exe file i m getting an error "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information." What could be the reason for this. Also i want to know from where i should download the latest version of graphml.cpp and graphml.hpp. As i have downloaded the latest version of boost from the sourceforge site but in this the graphml.cpp and graphml.hpp files are missing. Currently i m working with the version of Tiago but let me know if stable version are going to be included in the standard boost package or this itself is a the latest and stable version and i m missing out something. Thanks Abhishek Vyas ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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STL Maps
by merlin antony 14 Dec '07

14 Dec '07

hi, i'm using stl maps in my project to create maps. this stl maps is datatype specific. eg map<int,int>, map <string,int>, etc.. is they any way to create a template map like map<T,T>. so that the map is compatible across any datatype being passed to it? is it possible to do in boost library by using property map concept? thanx, merlin.

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Recursive grammar problem
by john 14 Dec '07

14 Dec '07

Hello, I have a string I want to parse that is like that A or A or A or ( C or C or C or ( D) or C) or B. Obviously A and B are just something else but we don't care about it here. I define it as mystring = (A | (ch_p('(') >> A >> ch_p(')'))) >> * ("or" >> (A | mystring)) the problem is that as this is exactly the same over and over, I'm getting the end results in the furthest mystring possible: B will be part of "( C or C or C or ( D) or C) or B" and not of the total string and that messes my grammar :( I have no idea how to pass that trouble, so any help on that would be appreciated (well if anyone understood what I said ;) ) Thanks

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Serialization of STL containers?
by Joseph Turian 14 Dec '07

14 Dec '07

I am unable to serialize STL containers. Here's an example, with error message foo.cpp: #include <iostream> #include <fstream> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/list.hpp> #include <boost/archive/tmpdir.hpp> class bus_route { friend class boost::serialization::access; std::list<int> stops; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & stops; } public: bus_route(){} }; main() { std::ofstream ofs("removeme"); boost::archive::text_oarchive oa(ofs); bus_route a; oa << a; } ==== $ gcc -o foo foo.cpp /usr/include/boost/archive/detail/oserializer.hpp: In function 'void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive, T = bus_route]': /usr/include/boost/archive/basic_text_oarchive.hpp:78: instantiated from 'void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = bus_route, Archive = boost::archive::text_oarchive]' /usr/include/boost/archive/detail/interface_oarchive.hpp:78: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = bus_route, Archive = boost::archive::text_oarchive]' foo.cpp:29: instantiated from here /usr/include/boost/archive/detail/oserializer.hpp:567: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' Any idea what I'm doing wrong?

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