February 2009 - Boost-users - lists.preview.boost.org

Need boost_regex_vc7_mssd.lib
by Dyuti Barma 09 Feb '09

09 Feb '09

Hi, I'm not sure where to find boost_regex_vc7_mssd.lib and the corresponding library for VC8. Can anyone let me know where to get the above libs from ? Thanks Dyuti

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Boost.lambda: how to sort this vector with function?
by Joost Kraaijeveld 09 Feb '09

09 Feb '09

I want to sort a vector of Edges according to their remaining estimated distance to the finish point (an own implementation of a graph algorithm). How do I sort this vector with edges: // Returns the cost between start and finish, given a graph int CostEstimate( const Graph& aGraph, const Vertex& start, const Vertex& finish) ... // Member function of a graph std::vector< Edge > v = ...; // Sort them according to the cost std::sort( v.begin(), v.end(), boost::lambda::bind( CostEstimate( (*this), boost::lambda::bind( &Edge::otherSide, &start, boost::lambda::_1), finish)) < boost::lambda::bind( CostEstimate( (*this), boost::lambda::bind( &Edge::otherSide, &start, boost::lambda::_2), finish))); where otherSide is a const function of the class Edge which returns a "const Vertex&" Compiling this results in an error: error: invalid initialization of reference of type ‘const Vertex&’ from expression of type ‘const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const Vertex& (Edge::* const)(const Vertex&)const, const Vertex* const, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >’ TIA -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 web: www.askesis.nl

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[Graph] is it possible to define my own edge_descriptor
by George Slavov 09 Feb '09

09 Feb '09

Hello, I have a graph which corresponds to an n by m grid of vertices. Edges in this graph are only allowed to point from one vertex to an adjacent vertex. In this situation, it would be wonderful if I could define an edge, so that its target is not a vertex_descriptor but some other construct which would allow me to store the target in just one byte or less instead of the full unsigned int which I use to describe my vertices. That is, the edge could go from vertex 102 to a descriptor in the range [0,8] which would give you enough information to compute which vertex you're talking about. The graph I'm working with is rather large. It could have millions of vertices and saving this kind of space would be fantastic. If it's important at all, mostly I'll be doing topological sort on these graphs. Is this possible? Best, George Slavov

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NURBS curves/surfaces
by Peter Barker 09 Feb '09

09 Feb '09

Hello, Is there anything in Boost current or planned to deal with NURBS curves/surfaces? Regards, Pete

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[boost-users][asio] why boost::thread thread1(boost::bind(...)) doesn't start io_service on multicore machine?
by tomasz jankowski 09 Feb '09

09 Feb '09

I would like to test my class which implements shared data. because of it I have written test code which use boost::thread & boost asio (please see below). the problem is that threads are NOT started... on multicore machine. one one core machine it runs fine. any idea why? tom #include <iostream> #include <istream> #include <ostream> #include <string> #include <boost/asio.hpp> #include <boost/date_time/posix_time/posix_time.hpp> #include <boost/bind.hpp> #include <boost/thread.hpp> #include "shared.hpp" #include <boost/random/linear_congruential.hpp> #include <boost/random/uniform_real.hpp> #include <boost/random/variate_generator.hpp> SharedData replyToClients; void handle_timeout1(const boost::system::error_code&) { boost::minstd_rand generator(42u); boost::uniform_real<> uni_dist(0,1); boost::variate_generator<boost::minstd_rand, boost::uniform_real<> >uni(generator, uni_dist); std::string key = "ello";std::cout<<key<<std::endl; std::string value1 = "see you later aligator"; std::string value2 = "what do you want to eat today?"; double cond = 0.500000; while(true){ if(uni() >= cond){ replyToClients.set(key,value1); }else{ replyToClients.set(key,value2); } } } void handle_timeout2(const boost::system::error_code&) { std::string key = "ello"; while(true){ std::cout<<replyToClients.get(key); } } int main(int argc, char* argv[]) { try{ boost::asio::io_service io_service; boost::system::error_code error; //boost::asio::io_service::work work(io_service); io_service.post(boost::bind(handle_timeout1,error)); io_service.post(boost::bind(handle_timeout2,error)); io_service.post(boost::bind(handle_timeout2,error)); io_service.post(boost::bind(handle_timeout2,error)); boost::thread thread1(boost::bind(&boost::asio::io_service::run, &io_service)); boost::thread thread2(boost::bind(&boost::asio::io_service::run, &io_service)); boost::thread thread3(boost::bind(&boost::asio::io_service::run, &io_service)); boost::thread thread4(boost::bind(&boost::asio::io_service::run, &io_service)); //io_service.run(); std::cout<<"the end\n"; io_service.stop(); thread1.join(); thread2.join(); thread3.join(); thread4.join(); } catch (boost::system::system_error& er) {std::cout << "Exception er: " << er.what() << "\n"; } catch (std::exception& e) { std::cout << "Exception e: " << e.what() << "\n"; } return 0; } ---------------------------------------------------- Nużą Cię utarte scenariusze? Wymyśl własną grę flashową i wygraj główną nagrodę 5.500 Euro: http://klik.wp.pl/?adr=http%3A%2F%2Fwhosegame.pl%2Fcontestcard.php%3Fcontes…

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[program_options] VM object unable to store the values of options
by Wenjing Jia 09 Feb '09

09 Feb '09

(Apologies if this message has come out for more than once, as I had problem with authorization and is unsure when the message is able to be seen by boost users!) Hi, I'm met a very weird thing when using the “Boost.Program_options” library. Somehow, the variable-map(VM) object is unable to store values of options which are fed in from the command line. I've been stuck in this stupid problem for two days and cannot find any clue about it. Can someone please give me a hint? I'm using the Visual Studio 2005 on Windows XP SP3 to compile some examples provided in Boost.Program_options Tutorial. The boost library was installed using the boost_1_34_1 installer. However, no matter what value I input to any option, the variable-map object "vm" I defined is unable to store it and output it correctly. For instance, I followed the instructions in the Tutorial of the Boost.Program_options and compiled the first simplest possible example "example/first.cpp". I then went to "start" of Windows XP and Run "cmd", then run: "first --compression 10". The output is always "Compression level was set to -858993460." regardless of what value I type after the "--compression". Below is the full codes of the program (copied from the "example/first.cpp"): ------------------------------------------------------------------------------- #include <boost/program_options.hpp> namespace po = boost::program_options; #include <iostream> #include <iterator> using namespace std; int main(int ac, char* av[]) { try { po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("compression", po::value<int>(), "set compression level") ; po::variables_map vm; po::store(po::parse_command_line(ac, av, desc), vm); po::notify(vm); if (vm.count("help")) { cout << desc << "\n"; return 1; } if (vm.count("compression")) { cout << "Compression level was set to " << vm["compression"].as<int>() << ".\n"; } else { cout << "Compression level was not set.\n"; } } catch(exception& e) { cerr << "error: " << e.what() << "\n"; return 1; } catch(...) { cerr << "Exception of unknown type!\n"; } return 0; } ------------------------------------------------------------------------------- I also tried on the other examples mentioned on that web page, such as "example/options_description.cpp". When I type: "options_description --optimization 4 -I foo a.cpp", the output is: "Include paths are: Input files are: Optimization level is -858993460". That is the input values are not taken and stored by the vm object. Why such a simple example won't work on my machine!? Your suggestion would be most appreciated! Many thanks in advance! Wenjing

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boost graph compiling problem with vc7.1
by liulewes 08 Feb '09

08 Feb '09

Dear there: I recently started to use the boost graph library and I got the following problem. I'v 2 projects A and B in my vc 7.1 solution. A uses boost graph lib while B is dependent on A. I'v no problem compiling A but got some errors in B like this: C:\Program Files\boost\boost_1_35_0\boost\graph\detail\adjacency_list.hpp(2292): error C2039: 'size_type' : is not a member of 'boost::vec_adj_list_impl<Graph,Config,Base>' with [ Graph=boost::adjacency_list<boost::vecS,boost::vecS,boost::undirectedS,boost::property<vmap_id_t,int,boost::property<boost::vertex_color_t,RGBColor,boost::property<vertex_feature_t,FeatureVector2D<double> *>>>,boost::property<boost::edge_weight_t,double>>, Config=boost::detail::adj_list_gen<boost::adjacency_list<boost::vecS,boost::vecS,boost::undirectedS,boost::property<vmap_id_t,int,boost::property<boost::vertex_color_t,RGBColor,boost::property<vertex_feature_t,FeatureVector2D<double> *>>>,boost::property<boost::edge_weight_t,double>>,boost::vecS,boost::vecS,boost::undirectedS,boost::detail::retag_property_list<boost::vertex_bundle_t,boost::property<vmap_id_t,int,boost::property<boost::vertex_color_t,RGBColor,boost::property<vertex_feature_t,FeatureVector2D<double> *>>>>::type,boost::detail::retag_property_list<boost::edge_bundle_t,boost::property<boost::edge_weight_t,double>>::type,boost::no_property,boost::listS>::config, Base=boost::detail::adj_list_gen<boost::adjacency_list<boost::vecS,boost::vecS,boost::undirectedS,boost::property<vmap_id_t,int,boost::property<boost::vertex_color_t,RGBColor,boost::property<vertex_feature_t,FeatureVector2D<double> *>>>,boost::property<boost::edge_weight_t,double>>,boost::vecS,boost::vecS,boost::undirectedS,boost::detail::retag_property_list<boost::vertex_bundle_t,boost::property<vmap_id_t,int,boost::property<boost::vertex_color_t,RGBColor,boost::property<vertex_feature_t,FeatureVector2D<double> *>>>>::type,boost::detail::retag_property_list<boost::edge_bundle_t,boost::property<boost::edge_weight_t,double>>::type,boost::no_property,boost::listS>::DirectedHelper ] and even like this: C:\Program Files\boost\boost_1_35_0\boost\pending\container_traits.hpp(150): error C2065: 'list' : undeclared identifier I think that I have all the standard headers included. Where mush I have been wrong? Thanks _________________________________________________________________ MSN资讯快递，帮助你第一时间了解最新资讯！ http://im.live.cn/newsexpress

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Linking boost in iphone application
by Gustavo Garcia Bernardo 08 Feb '09

08 Feb '09

Hi, After building boost for the iphone following these instructions http://lists.boost.org/boost-users/2008/11/42094.php , I have a problem using it in my iphone application. If I link any part of boost with the application it crashes at startup. I don't have any problem linking other C++ library. Has anybody else faced the same problem? How to reproduce it: 1. Create a objective-c class in the application (Test.h, Test.mm) 2. Include "#import <boost/system/error_code.hpp>" in the Test.mm file. 3. Link libboost_system-xgcc40-mt_1.37.a Thank you very much for any clue, G.

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string iterator not dereferencable
by Alessandro Condotta 07 Feb '09

07 Feb '09

Hi all, I am newbie and I am developing in C++ using VC9, Boost 1.37, CPLEX 11.1. I use date_time and program_options boost libraries and my program compiles fine. Date_time works perfectly while program_options gives me a runtime error saying "Debug assertion failed .... string iterator not dereferencable" every time I pass any argument in the command line. The assertion fails at line 112 of "C:\program files\microsoft visual studio 9.0\vc\include\xstring" So I try to figure out what was going on in the following way: - I tried "first.cpp" in program option example directory on a new project: it works with no problem. -Then I tried to replace the main function of my project with the exact code of "first.ccp" and I got "string iterator not dereferencable" again. Can anyone help me ? Many thanks in advance Alessandro

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[thread_pool|range_ex|bind] Extrange behaviour with fibonacci example and parallel_sort
by vicente.botet 07 Feb '09

07 Feb '09

Hi, I have tried to do a parallel_sort using the Boost.ThreadPool library and I get some realy extrange. I have copied the fibonacci example and adapted it to do a parallel sort. See attached file. When I set the defines FIBO this works some times, don't finish others and crash the others. I have added some traces (define COUT) and I get better results but not always correct. I suspected that the threads in the thread pool needs to be stoped. I have added a pool shutdown but nothing changes. Oliver, could you take a look? When I define X_SORT the compilation even do not finish. What is wrong on my definition of parallel_sort? Am I using boost:bind incorrectly? Is there some issue with binding function templates? Can some one help me? Thanks in advance, Vicente P.S. I'm using Boost 1.37 + The file compiles only with the lates version of the Boost.Range library http://www.boostpro.com/vault/index.php?action=downloadfile&filename=range_… and the Boost.ThreadPool version 17 http://www.boostpro.com/vault/index.php?action=downloadfile&filename=boost-… $ gcc --version gcc (GCC) 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) Copyright (C) 2004 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Debug session $ gdb x_sort2 GNU gdb 6.8.0.20080328-cvs (cygwin-special) Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-pc-cygwin"... (gdb) help List of classes of commands: aliases -- Aliases of other commands breakpoints -- Making program stop at certain points data -- Examining data files -- Specifying and examining files internals -- Maintenance commands obscure -- Obscure features running -- Running the program stack -- Examining the stack status -- Status inquiries support -- Support facilities tracepoints -- Tracing of program execution without stopping the program user-defined -- User-defined commands Type "help" followed by a class name for a list of commands in that class. Type "help all" for the list of all commands. Type "help" followed by command name for full documentation. Type "apropos word" to search for commands related to "word". Command name abbreviations are allowed if unambiguous. (gdb) run Starting program: /home/Vicente/SVN/bin.v2/vbe_interthreads/libs/interthreads/te st/x_sort2.test/gcc-3.4.4/debug/link-static/threading-multi/x_sort2.exe [New thread 3056.0x128] [New thread 3056.0x68c] std::sort: reverse 0..100000 0.05 s [New thread 3056.0xfe4] [New thread 3056.0x1c8] 55 Program exited normally. (gdb) run Starting program: /home/Vicente/SVN/bin.v2/vbe_interthreads/libs/interthreads/te st/x_sort2.test/gcc-3.4.4/debug/link-static/threading-multi/x_sort2.exe [New thread 4028.0xd48] [New thread 4028.0xef4] std::sort: reverse 0..100000 0.03 s [New thread 4028.0x9ec] [New thread 4028.0x5bc] [New thread 4028.0x3bc] [Switching to thread 4028.0x3bc] Quit (gdb) run The program being debugged has been started already. Start it from the beginning? (y or n) y Starting program: /home/Vicente/SVN/bin.v2/vbe_interthreads/libs/interthreads/te st/x_sort2.test/gcc-3.4.4/debug/link-static/threading-multi/x_sort2.exe [New thread 2220.0x4dc] [New thread 2220.0xe58] std::sort: reverse 0..100000 0.05 s [New thread 2220.0x9b0] [New thread 2220.0x778] [New thread 2220.0x264] Program received signal SIGINT, Interrupt. [Switching to thread 2220.0x264] 0x7c87635d in KERNEL32!GetConsoleCharType (Quit (gdb) run The program being debugged has been started already. Start it from the beginning? (y or n) y Starting program: /home/Vicente/SVN/bin.v2/vbe_interthreads/libs/interthreads/te st/x_sort2.test/gcc-3.4.4/debug/link-static/threading-multi/x_sort2.exe [New thread 3964.0xf40] [New thread 3964.0xedc] std::sort: reverse 0..100000 0.05 s [New thread 3964.0x320] [New thread 3964.0xe44] [New thread 3964.0x544] [Switching to thread 3964.0x544] Quit (gdb) q The program is running. Exit anyway? (y or n) y Vicente@viboes1 ~/SVN/bin.v2/vbe_interthreads/libs/interthreads/test/x_sort2.tes t/gcc-3.4.4/debug/link-static/threading-multi $ gdb x_sort2 GNU gdb 6.8.0.20080328-cvs (cygwin-special) Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-pc-cygwin"... (gdb) run Starting program: /home/Vicente/SVN/bin.v2/vbe_interthreads/libs/interthreads/te st/x_sort2.test/gcc-3.4.4/debug/link-static/threading-multi/x_sort2.exe [New thread 1076.0x31c] [New thread 1076.0x9b8] std::sort: reverse 0..100000 0.05 s [New thread 1076.0xaec] [New thread 1076.0xdc0] 19239 [unknown (0xDC0)] x_sort2 1076 _cygtls::handle_exceptions: Exception: ST ATUS_ACCESS_VIOLATION 59227 [unknown (0xDC0)] x_sort2 1076 open_stackdumpfile: Dumping stack trace t o x_sort2.exe.stackdump Program received signal SIGSEGV, Segmentation fault. [Switching to thread 1076.0xdc0] 0x610b6132 in pthread_cond::~pthread_cond () from /usr/bin/cygwin1.dll (gdb) run The program being debugged has been started already. Start it from the beginning? (y or n) y Starting program: /home/Vicente/SVN/bin.v2/vbe_interthreads/libs/interthreads/te st/x_sort2.test/gcc-3.4.4/debug/link-static/threading-multi/x_sort2.exe [New thread 1876.0x8dc] [New thread 1876.0x938] std::sort: reverse 0..100000 0.05 s [New thread 1876.0x624] [New thread 1876.0xe28] 55 Program exited normally. (gdb) run Starting program: /home/Vicente/SVN/bin.v2/vbe_interthreads/libs/interthreads/te st/x_sort2.test/gcc-3.4.4/debug/link-static/threading-multi/x_sort2.exe [New thread 3240.0xef8] [New thread 3240.0xfb8] std::sort: reverse 0..100000 0.05 s [New thread 3240.0x5d4] [New thread 3240.0xe04] [New thread 3240.0x884] [Switching to thread 3240.0x884] Quit (gdb) q The program is running. Exit anyway? (y or n) y

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