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Simple regex question
by david v 04 Jul '07

04 Jul '07

Hello, I'm trying to use regex_search to look for regular expressions. regex = (david|divad) stringtosearch = "david" So I'm looking for regex above in the string "david". As you see a very basic example. I'm expecting to find two hits, but I thought I should recover "david" and "david" and not twice the same match "david" ??? Here is a snippet of the code: .... boost::smatch match; start = stringtosearch.begin(); //that would be the start of "david" end = stringtosearch.end(); // that would be the end of "david" old_pos = 0; cout << "Looking for regex:" << regex << " in string " << stringtosearch << endl; while (boost::regex_search(start,end,match,regex)) { old_pos += match.position()+1; std::string t = match[0]; std::cout << "\tFound:" << match[0] << endl; old_pos += match.length(); start = match[0].second; } catch(const std::exception &regex) { std::cerr << "Exception:" << regex.what() << std::endl; exit(-1); } Here is the output: Looking for regex:(david|divad) in string david Found david Looking for regex:(david|divad) in string david Found david As you can see, pattern "david" is found twice ??? I was expecting two different patterns to be found "david" and "divad". By the way how can I recover the total number of matches found ?? thanks, david _________________________________________________________________ MSN Messenger : discutez en direct avec vos amis ! http://www.msn.fr/msger/default.asp

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[signal] How to disconnect?
by Boris 04 Jul '07

04 Jul '07

void Hello() { } boost::signal<void ()> sig; sig.connect(&Hello); // OK sig.disconnect(&Hello); // Error Can anyone tell me how I disconnect the callback function Hello? I can see in the documentation that I can call disconnect with a group_type and with a slot_type but not with a slot_function_type. I'm surprised to run into such a problem as from the point of view of a library user it can't get much easier than that? Boris PS: This is with Boost 1.33.1.

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[parameter] _type not defined in function signature
by Krishna Roskin 03 Jul '07

03 Jul '07

Hey everyone, I'm trying to use Boost.Parameter to make my 9 parameter BGL function more manageable. My code is very close to the example given in the Parameter docs for depth_first_search: BOOST_PARAMETER_NAME(simplified) BOOST_PARAMETER_NAME(original) BOOST_PARAMETER_NAME(initial_vertex) BOOST_PARAMETER_NAME(final_vertex) BOOST_PARAMETER_FUNCTION( (void), simp, tag, (required (in_out(simplified), *) (original, *) ) (optional (initial_vertex, (typename graph_traits<original_type>::vertex_descriptor), original.initial_vertex) (final_vertex, (typename graph_traits<original_type>::vertex_descriptor), original.final_vertex) ) ) { simplify(simplified, original, target_io_edge_map<simplified_type, original_type>(), accumulate_edge_weight(), initial_vertex, final_vertex); } When compiling this under GCC 4.0.1 I get an "'original_type' has not been declared" error in the function signature. The original_type in the function body is fine. If I change the type of initial_vertex and final_vertex to *, then everything works fine. Any idea why this code (which is almost the same as the example given for depth_first_search) doesn't work? Thanks for any help anyone can give and I hope everyone's having a good summer. -krish I'm using 1.34 and here's what gcc -v says: Using built-in specs. Target: i686-apple-darwin8 Configured with: /private/var/tmp/gcc/gcc-5250.obj~12/src/configure --disable-checking -enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.0/ --with-gxx-include-dir=/include/c++/4.0.0 --build=powerpc-apple-darwin8 --with-arch=pentium-m --with-tune=prescott --program-prefix= --host=i686-apple-darwin8 --target=i686-apple-darwin8 Thread model: posix gcc version 4.0.1 (Apple Computer, Inc. build 5250)

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[BGL] Troubles with floyd_warshall_all_pairs, johnson_all_pairs
by Alex Ivanov 03 Jul '07

03 Jul '07

Hi, guys! I'm stumbled upon a weird problem using SUBJ. functions! Lets suppose that we don't know how much Vertexes we are going to have (for instance Vertexes might be got from file or stdin). So then, in my opinion, is completely impossible to execute SUBJ functions! Let me explain: =============== int xx; //"xx" is runtime-defined vertices size. double* cmat=new(xx*xx); //"cmat" is adjacency matrix actually, it's also defined during runtime. InitCmat(); //here I fill in "cmat" array typedef adjacency_list<listS, vecS, directedS, no_property, property<edge_weight_t, double> > Graph; //This is from some example Graph G(xx); for (int i=0;i<xx;i++) { for (int j=0;j<xx;j++) { if (cmat[i*xx+j]!=0) { add_edge(i,j,cmat[i*xx+j],G); } } } //and now the most interesting part of the code //AFAIK it's impossible to declare array using directive below in runtime: double [xx][xx] D; //Compiler says the same: "C2057: expected constant expression" //even code: double [(const int)xx][(const int)xx] D; //won't work, so the only option left is to make a pointer: double* D = new [xx*xx] ; //but both "floyd_warshall_all_pairs_shortest_paths" and "johnson_all_pairs_shortest_paths" are declared to take a reference, not a pointer, so you'll get multiple compile errors, if you try to compile like below: floyd_warshall_all_pairs_shortest_paths(G, D); //the instruction above will cause multiple compile errors like this: \boost_1_34_0\boost\graph\floyd_warshall_shortest.hpp(115): error C2109: subscript requires array or pointer type P.S. Compiler is MSVC7.1, but I also read that gcc does the same. P.S.S. Sorry for duplication, if this also appears in [devel] list. =============== 1. What can I do to get this code work? 2. If no workaround is available, don't you think that it's a good idea to change the DistanceMatrix type in prototypes to pointers? Thanks in advance! //Alex.

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[wave] thread safety???
by Ovanes Markarian 03 Jul '07

03 Jul '07

Hello Hartmut! I would like to start multiple preprocessing threads. Is wave thread-safe or there some points I should take in account? With Kind Regards, Ovanes Markarian

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[Boost.Graph] Parameter for the Dijkstra-Algorithm
by Ewgenij Sokolovski 03 Jul '07

03 Jul '07

Hello, I read in the documentation that the parameter weight_map of dijkstra_shortest_paths should be a model of Readable Property Map. http://www.boost.org/libs/graph/doc/dijkstra_shortest_paths.html Readable Property Map interface defines a function get(), which has to be contained in each implementation of the interface. OK so far. But when you look at the example provided with the boost library, you see that a simple STL vector is used as weight map. http://www.boost.org/libs/graph/example/dijkstra-example.cpp And STL vector doesn't provide a get() function at all. So the whole thing shouldn't work at all. So where is the magic explanation?:) Ewgenij -- GMX FreeMail: 1 GB Postfach, 5 E-Mail-Adressen, 10 Free SMS. Alle Infos und kostenlose Anmeldung: http://www.gmx.net/de/go/freemail

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Bjam
by question boost 03 Jul '07

03 Jul '07

Hi, using Code Blocks i got the folowing message.ld.exe "Cannot find -lboost_filesystem-mgw-mt-s-l_33_l"So I decided to use bjam. Then, cd /jam source location/build.bat. Then I set the variables BOOST_ROOT= C:\Documents and Settings\src\boostand BOOST_BUILD_PATH=C:\Documents and Settings\src\boost\tools\build\v2. So what must I do now in order to build my project with bjam under Code Blocks? Be very clear, Thank You. Thank You _________________________________________________________________ Besoin d'un e-mail ? Créez gratuitement un compte Windows Live Hotmail, plus sûr, plus simple et plus complet ! http://www.windowslive.fr/hotmail/default.asp

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how to get the documentation of 1.34.0
by frederic.bron＠alcan.com 02 Jul '07

02 Jul '07

Hello, The documentation of 1.34.0 is on the www.boost.org web site. How can I download it? On sourceforge, I can only find 1.33.1 and also I do not see any html package. Is is possible to build it from the source package, how then? Regards, F. Bron Avis : Ce message et toute pièce jointe sont la propriété d'Alcan et sont destinés seulement aux personnes ou à l'entité à qui le message est adressé. Si vous avez reçu ce message par erreur, veuillez le détruire et en aviser l'expéditeur par courriel. Si vous n'êtes pas le destinataire du message, vous n'êtes pas autorisé à utiliser, à copier ou à divulguer le contenu du message ou ses pièces jointes en tout ou en partie. Notice: This message and any attachments are the property of Alcan and are intended solely for the named recipients or entity to whom this message is addressed. If you have received this message in error please inform the sender via e-mail and destroy the message. If you are not the intended recipient you are not allowed to use, copy or disclose the contents or attachments in whole or in part.

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Re: [Boost-users] multiple definition error when linking with filesystem
by KLINIK Markus SDI2-G (AREVA NP GmbH) 02 Jul '07

02 Jul '07

Hi! See also http://svn.boost.org/trac/boost/ticket/995. Best Regards Markus

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[program_options] strange linker error with minGW
by pheres 02 Jul '07

02 Jul '07

Hello, I run into following problems compiling a programm what uses boost::program_options under gcc version 3.4.2 / mingw: --------------------------------------------------------------------------------------------------------------------------- ++ -mthreads src/entity/EntityManager.o src/entity/TestJob.o lib/Sched.lib lib/Timer.lib /C/workspace-eclipse/ReflectiveMemory.Linux/lib/mingw/debug/libsw_rm.dll /mingw/lib/libwsock32.a ../../src/common/lib/libpthreadGC2.a /mingw/lib/libwinmm.a /C/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/lib/libboost_filesystem-mgw.lib /C/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/lib/boost_date_time-mgw.lib /C/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/lib/boost_program_options-mgw.lib -o bin/EntityManager.exe Info: resolving vtable for boost::program_options::variables_mapby linking to __imp___ZTVN5boost15program_options13variables_mapE (auto-import) Info: resolving vtable for boost::program_options::value_semantic_codecvt_helper<char>by linking to __imp___ZTVN5boost15program_options29value_semantic_codecvt_helperIcEE (auto-import) Info: resolving boost::program_options::arg by linking to __imp___ZN5boost15program_options3argE (auto-import) Info: resolving vtable for boost::program_options::validation_errorby linking to __imp___ZTVN5boost15program_options16validation_errorE (auto-import) src/entity/EntityManager.o: In function `basic_command_line_parser':c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:42: undefined reference to `boost::program_options::detail::cmdline::cmdline(std::vector<std::string, std::allocator<std::string> > const&)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:49: undefined reference to `boost::program_options::detail::cmdline::set_options_description(boost::program_options::options_description const&)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:67: undefined reference to `boost::program_options::detail::cmdline::style(int)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:75: undefined reference to `boost::program_options::detail::cmdline::set_additional_parser(boost::function1<std::pair<std::string, std::string>, std::string const&, std::allocator<boost::function_base> >)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:102: undefined reference to `boost::program_options::detail::cmdline::run()' collect2: ld returned 1 exit status make[1]: *** [bin/EntityManager.exe] Error 1 make[1]: Leaving directory `/c/workspace-eclipse/SimulationEngine/mingw/debug' make: *** [Tests] Error 2 --------------------------------------------------------------------------------------------------------------------------- here is the fragment that causes that behavior: --------------------------------------------------------------------------------------------------------------------------- // Declare the supported options. po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("client_id", po::value<int>(&mClientId), "set em's client id.") ("srv_ip", po::value<string>(&mSrvIp), "set SWRM server ip adress. Default is 127.0.0.1") ("srv_port", po::value<int>(&mSrvPort), "set SWRM server port number. Default is 8011") ; po::variables_map vm; // trouble starts with commenting in the following line(s): // po::store(po::parse_command_line(globalArgc, globalArgv, desc), // vm); // po::notify(vm); // // if (vm.count("help")) // { // cout << desc << "\n"; // exit(EXIT_SUCCESS); // } // // if (0 == mClientId) // { // cout << "No client_id set. Exiting...\n"; // exit(EXIT_FAILURE); // } // if( 2 > mClientId ) // { // cout << "Client_id has to be greater than 1." // << " 1 is reserved for SWRM server. Exiting...\n"; // exit(EXIT_FAILURE); // }else // { // cout << "client_id of this EM was set to " // << mClientId << "\n"; // } // // if (vm.count("srv_ip")) // { // cout << "SWRM server ip set to " << mSrvIp << "\n"; // }else // { // cout << "SWRM server ip set to " << mSrvIp << "\n"; // } // // if (vm.count("srv_port")) // { // cout << "SWRM server port set to " << mSrvPort << "\n"; // }else // { // cout << "SWRM server port set to " << mSrvPort << "\n"; // } --------------------------------------------------------------------------------------------------------------------------- All does compile fine under linux. And also the other boost libs I'm using (filesystem and date_time) behave well. What I'm doing wrong? Thank you in advance!

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