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[BOOST]BOOST_AUTO_TEST_CASE_TEMPLATE vs BOOST_AUTO_TEST_CASE
by Hemanth Choudary M V (RBEI/ETA1) 13 Jan '14

13 Jan '14

Hi, Scenario1: Both files are present in the same Project BoostUnitTest. fileA: typedef boost::mpl::list<long long,unsigned char> test_types; BOOST_AUTO_TEST_SUITE(MySuite) BOOST_AUTO_TEST_CASE_TEMPLATE( my_test, T, test_types ) { BOOST_CHECK_EQUAL( sizeof(T), (unsigned)4 ); } BOOST_AUTO_TEST_SUITE_END() fileB: typedef boost::mpl::list<long long,unsigned char> test_types; BOOST_AUTO_TEST_SUITE(MySuite) BOOST_AUTO_TEST_CASE_TEMPLATE( my_test, T, test_types ) { BOOST_CHECK_EQUAL( sizeof(T), (unsigned)4 ); } BOOST_AUTO_TEST_SUITE_END() As shown above, MySuite is extended across 2 files fileA and fileB. The BOOST_AUTO_TEST_CASE_TEMPLATE name is same across the both the files and and the suite name is also same across both the files.. Boost is able to differentiate between the 2 test cases and the test cases are executed. Scenario2: fileA: BOOST_AUTO_TEST_SUITE(MySuite) BOOST_AUTO_TEST_CASE( my_test) { BOOST_CHECK_EQUAL(1,1); } BOOST_AUTO_TEST_SUITE_END() fileB: BOOST_AUTO_TEST_SUITE(MySuite) BOOST_AUTO_TEST_CASE_TEMPLATE( my_test ) { BOOST_CHECK_EQUAL( 1,1 ); } BOOST_AUTO_TEST_SUITE_END() In the scenario2, I get a compile time error (Error 1 error LNK2005: "public: void __thiscall mySuite::insuite2::test_method(void)" (?test_method@insuite2@mySuite@@QAEXXZ) already defined in BoostUnitTest.obj) which basically suggests that one or more multiply defined symbols are found. Why is the behaviour different in these 2 scenarios? How is Boost able to differenciate between the 2 test cases in Scenario1? Mit freundlichen Grüßen / Best Regards, Hemanth Choudary MV RBEI/ETA1

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[Boost.Test] Detail lost when using BOOST_*_NO_THROW
by Adam Nielsen 13 Jan '14

13 Jan '14

Hi again, While developing tests I sometimes find that functions that should not throw exceptions do. Because this is an unexpected situation, I would like to know what exception has been thrown so I know what problem to look for in my test design. Unfortunately the Boost.Test framework only provides a terse message like this: test.cpp(123): fatal error in "fnTest": exception thrown by test(); It doesn't tell you which exception was thrown, nor the reason why. Is there some way to tell Boost.Test to include the exception message (from what()) if the exception derives from std::exception? This would make problem solving much quicker as you would not have to run the tests through a debugger to see which exception is being thrown and why. There is some discussion about this on Stack Overflow[1] but the consensus seems to be the best solution is not to use BOOST_*_NO_THROW. If you don't use these and an exception is thrown, a lot more detail is provided. Assuming this is a limitation in Boost.Test, would it be possible to add this as a feature so that future versions include the same level of detail whether you use BOOST_*_NO_THROW or not? Many thanks, Adam. [1] http://stackoverflow.com/questions/15133259/boost-check-no-throw-how-to-get…

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--run_test and using this to run a subset of Testcases.
by Manuel Maier 13 Jan '14

13 Jan '14

Hi I am looking for help considering running sets of Testcases/Testsuites. First off, is there a possibility to do a negative selection. i.e. tell boost.test to NOT run certain Testcases/testsuites? Further is it possible to run sets of Testcases(which may reside in different testsuites)? Assume following test tree: MASTER suite1 case1 case2 suite2 testcase1 testcase2 suite3 subsuite testcase1 Now lets say I wanna run testcase case1, testcase2 and the subsuite testsuite. Is this even possible? Kind Regards and thanks a lot for help Manuel Maier _____________________________________________ Manuel Maier, B. Eng. Business Unit "Motion" / Research & Development Bernecker + Rainer Industrie-Elektronik Ges.m.b.H. B&R Strasse 1 5142 Eggelsberg Austria Tel: +43 7748 6586 Fax: +43 7748 6586 - 24 Email: manuel.maier(a)br-automation.com http://www.br-automation.com ____________________________________________________________ Firmenbuchnummer: Landesgericht Ried im Innkreis / FN 111651 v

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[Boost.Test] Unable to perform init at startup
by Adam Nielsen 12 Jan '14

12 Jan '14

(Apologies for the last message, I am using an unfamiliar keyboard and accidentally pressed the 'send' keyboard combination.) Hi all, I'm having a bit of a problem trying to figure out how to perform some class init while manually registering my tests. I want to run a set of tests which all share the same class instance (this is a factory class that creates the objects to be tested.) I am creating a number of global class instances and using boost::bind in the constructor to register the tests with Boost.Test. This works fine, except that I need to create the factory class before the tests can be run. In case the factory class fails, I want to use some of the Boost.Test checks in the initialisation function. However when I do this, I get this runtime error: terminate called after throwing an instance of 'std::runtime_error' what(): can't use testing tools before framework is initialized I am assuming this means I need to wait with the construction of my factory class until Boost.Test is ready, but I am unsure how to do this. I am #defining BOOST_TEST_MODULE, and when I try to declare a function called init_unit_test() as suggested in the docs it tells me the function already exists. If I remove the BOOST_TEST_MODULE #define, then it complains that main() is not implemented. I am a bit confused because I do not understand the reason for having init_unit_test() if you cannot implement it. If you choose not to use the Boost auto function then it seems you must implement your own main(), so I would expect your init code would go there, so there is no need for the init_unit_test() function? Is there some other way not mentioned in the docs to manually register tests (which are class member functions) but where the class can call Boost.Test functions in its constructor? Many thanks, Adam.

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Using boost asio with client certificate "sslv3 handshake failure"
by Jeff Perkins 12 Jan '14

12 Jan '14

We are trying to connect to our server using boost asio and getting the error "handshake: sslv3 alert handshake failure". We have tried changing the ssl type, setting verify peer to none and a few other things with no success. The pem file we are using originated as a p12 file that we used openssl to output to a pem file for use in this project. Within the pem file there is both an encrypted private key and certificate. I have searched stackoverflow of a solution but the only similar thing that came up was openssl not being installed correctly which doesn't appear to be the problem in this case. Is there something I'm missing in my call back as I'm not passing a purpose or length, although I cannot find appropriate values to pass as purpose in the boost docs. - std::size_t max_length, // The maximum size for a password. - password_purpose purpose // Whether password is for reading or writing. using boost::asio::ip::tcp; boost::system::error_code ec; boost::asio::io_service io_service; boost::asio::ssl::context ctx(io_service, boost::asio::ssl::context::sslv23); ctx.set_password_callback(my_password_callback); ctx.use_private_key_file("/key1.pem",boost::asio::ssl::context_base::pem, ec); namespace ssl = boost::asio::ssl; typedef ssl::stream ssl_socket; ssl_socket sockconn(io_service, ctx); tcp::resolver resolver(io_service); tcp::resolver::query query(" tech.loopfish.com", "https"); boost::asio::connect(sockconn.lowest_layer(), resolver.resolve(query)); sockconn.lowest_layer().set_option(tcp::no_delay(true)); sockconn.set_verify_mode(boost::asio::ssl::verify_peer); sockconn.set_verify_callback(ssl::rfc2818_verification("tech.loopfish.com ")); sockconn.handshake(ssl_socket::client);

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[Boost.Graph] How to build a directed graph
by Lucas Soltic 10 Jan '14

10 Jan '14

Hello, I’m trying to build a DAG thanks to BGL, the source code builds fine but crashes at runtime. And I’m a bit lost on the reason. I don’t even know if my typedefs are correct according to my purpose: simply building a DAG whose nodes are « Classes » with arcs that point to « parents ». I’ve written the following: #include <list> #include <boost/graph/directed_graph.hpp> class MyClass {}; typedef MyClass* Vertex; typedef std::pair<Vertex, Vertex> Edge; typedef boost::directed_graph<Vertex, Edge> ClassInheritanceGraph; static ClassInheritanceGraph g_parentClassGraph; void buildGraph(void) { std::list<Edge> edges; edges.push_back(std::make_pair(new MyClass, new MyClass)); edges.push_back(std::make_pair(new MyClass, new MyClass)); std::list<Edge>::iterator edgesIt; for (edgesIt = edges.begin(); edgesIt != edges.end(); edgesIt++) { Vertex child = edgesIt->first; Vertex parent = edgesIt->second; boost::add_edge(child, parent, g_parentClassGraph); } } int main() { buildGraph(); return 0; } The program crashes on boost::add_edge() with a segfault. The point is I don’t know if I’m correctly using BGL. I don’t really know what is the proper way (I don’t understand everything from the BGL documentation…). I tried to debug the program but with all those template arguments I don’t understand the error (http://pastebin.com/BRgz3uL7 in case you want to make nightmares :) ). Thus in case someone understands what’s wrong here I would be really grateful for some help! Thanks, Lucas

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[iterator] error while accessing member of result of brackets-operator
by Sebastian Pfützner 10 Jan '14

10 Jan '14

Hello, the following code does not compile with the last line in main(). The error message is main.cpp: In function 'int main()': main.cpp:37:8: error: 'boost::detail::operator_brackets_result<It, S, S&>::type' has no member named 'i' it[3].i = 0; ^ What could be the problem? #include <boost/iterator/iterator_facade.hpp> struct S { int i; float f; }; class It : public boost::iterator_facade<It, S, boost::random_access_traversal_tag> { private: friend class boost::iterator_core_access; static S s; reference dereference() const { return s; } bool equal(It const&) const { return true; } void increment() {} void decrement() {} void advance(difference_type n) {} difference_type distance_to(It const&) const { return 0; } }; int main() { It it; (*(it + 3)).i = 0; S& s = it[3]; s.i = 0; it[3].i = 0; } -- Sebastian Pfützner s.pfuetzner(a)onlinehome.de ICQ-ID: 39965036

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boost process : how to use it
by Vincent R. 09 Jan '14

09 Jan '14

Hi, What is the status of boost:process, when looking on internet you can find different version that are more or less compatible. Not an ideal situation and I am a bit surprised that this lib doesn't get more love from c++ dev. Anyway after a long time coding in easier language I decided to do a small project under linux that consists in a tcp server running on linux that start some process initiated by a client and sends the output. So I have downaloaded the most "official" version I could find here http://www.highscore.de/boost/process/ and I tried the following code : #include <cassert> #include <iostream> #include <map> #include <string> #include <sstream> #include <vector> #include <boost/asio.hpp> #include <boost/enable_shared_from_this.hpp> #include <boost/process.hpp> namespace asio = boost::asio; namespace bp = boost::process; using asio::ip::tcp; bp::child start_child() { std::string exec = boost::process::find_executable_in_path("dpkg"); std::vector<std::string> args; args.push_back("-l"); bp::context ctx; ctx.stderr_behavior = bp::capture_stream(); return bp::launch(exec, args, ctx); } int main(int argc, char *argv[]) { std::string value; bp::child c = start_child(); bp::pistream &is = c.get_stderr(); std::string line; while (std::getline(is, line)) { value += line + "\r\n"; } c.wait(); std::cout << "OUTPUT: " << value << std::endl; return 0; } My first question is how can I merge the stderr with stdout because some commands use stdout and some others stderr ? My second question is : why the code above doesn't work properly and doesn't handle the arguments I am passing ? Indeed when I run the code I get the following output : OUTPUT: dpkg: error: need an action option it means that the -l is not taken in consideration. Thanks for any help

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Re: [Boost-users] How to create distributed_property_map (??????? ?????)
by Николай Кинаш 09 Jan '14

09 Jan '14

So, now i have: struct centrality_t { typedef vertex_property_tag kind; }; typedef property<centrality_t, double> VertexCentrality; typedef boost::adjacency_list<listS, distributedS<mpi_process_group,vecS>, undirectedS, VertexCentrality> Graph; typedef boost::unique_rmat_iterator<boost::minstd_rand, Graph> RMATGen; struct no_self_loops { no_self_loops() {} bool operator()(const std::pair<int,int>& e) { return e.first != e.second; } }; template <typename G> struct VertexKey { typedef int value_type; typedef typename graph_traits<G>::vertex_descriptor key_type; typedef read_write_property_map_tag category; typedef int* reference; }; int main(int argc, char* argv[]) { boost::mpi::environment env(argc, argv); boost::minstd_rand gen; unsigned int SCALE = atoi(argv[1]); unsigned int EDGE_FACTOR = atoi(argv[2]); unsigned int N = pow(2, SCALE); unsigned int E = EDGE_FACTOR * N; Graph g( boost::make_filter_iterator<no_self_loops> ( RMATGen(gen, N, E, 0.45, 0.15, 0.15, 0.25), RMATGen()), boost::make_filter_iterator<no_self_loops>(RMATGen(), RMATGen()), N); typedef boost::property_map<Graph, centrality_t>::type LocalMap; typedef boost::parallel::distributed_property_map<mpi_process_group, LocalMap, VertexKey<Graph> > CentralityMap; LocalMap local_map = get(centrality_t(), g); mpi_process_group process_groupe; //VertexKey<Graph> vertex_key; CentralityMap centrality_map(process_groupe, local_map); //brandes_betweenness_centrality(g, centrality_map); } network.cpp: In function ‘int main(int, char**)’: network.cpp:78: error: no matching function for call to ... /opt/boost_1_54_0_icc/boost/property_map/parallel/ distributed_property_map.hpp:329: note: candidates are: boost::parallel::distributed_property_map<ProcessGroup, GlobalMap, StorageMap>::distributed_property_map(const ProcessGroup&, const GlobalMap&, const StorageMap&) Is this right arguments centrality_map(process_groupe, local_map) ? Or it must be: VertexKey<Graph> vertex_key; CentralityMap centrality_map = boost::parallel::make_distributed_property_map(process_groupe, local_map, vertex_key); In this case: network.cpp:78: instantiated from here /opt/boost_1_54_0_icc/boost/property_map/parallel/impl/distributed_property_map.ipp:140: error: request for member ‘first’ in ‘p’, which is of non-class type ‘double’ /opt/boost_1_54_0_icc/boost/property_map/parallel/impl/distributed_property_map.ipp:142: error: request for member ‘second’ in ‘p’, which is of non-class type ‘double’ /opt/boost_1_54_0_icc/boost/property_map/parallel/impl/distributed_property_map.ipp:142: error: request for member ‘second’ in ‘p’, which is of non-class type ‘double’ Any suggestions? Thanks.

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[boost-users][asio] Can't read socket
by Miklós Tóth 08 Jan '14

08 Jan '14

Hi Community, I've a problem with named-pipe communication. Please help me investigate this. I'm totally clueless now. I have a Connector class. I want to read some data from a socket. This is it: class Connector { public: Connector(boost::asio::io_service& io_service) : _io_service(io_service), _socket(io_service) { _endpoint.address(boost::asio::ip::address::from_string("127.0.0.1")); _endpoint.port(4242); _socket.async_connect(_endpoint, boost::bind(&Connector::handle_accept, this, boost::asio::placeholders::error)); } void close() { _io_service.post(boost::bind(&Connector::do_close, this)); _io_service.stop(); } private: void handle_accept(const boost::system::error_code& error) { if (error) { throw ConnectorError(_T("Cannot estabilish connection.")); } boost::asio::async_read(_socket, boost::asio::buffer(_readbuffer, 1024), boost::bind(&Connector::handle_read, this, boost::asio::placeholders::error)); } void handle_read(const boost::system::error_code& error) { if (!error) { if (_readbuffer.empty()) { boost::this_thread::sleep(boost::posix_time::milliseconds(100)); } else { std::string string_buffer; std::copy(_readbuffer.begin(), _readbuffer.end(), std::back_insert_iterator<std::string>(string_buffer)); std::cout << string_buffer << std::endl; _readbuffer.clear(); } boost::asio::async_read(_socket, boost::asio::buffer(_readbuffer, 1024), boost::bind(&Connector::handle_read, this, boost::asio::placeholders::error)); } } void do_close() { _socket.close(); } boost::asio::io_service& _io_service; boost::asio::ip::tcp::socket _socket; boost::asio::ip::tcp::endpoint _endpoint; std::vector<char> _readbuffer; }; This is how I use it: boost::asio::io_service io_service; Connector connector(io_service); boost::thread async_io_thread(boost::bind(&boost::asio::io_service::run, &io_service)); while (1) { //... stuff } connector.close(); async_io_thread.join(); But whenever I send a data package, this class is unable to read it from the socket. The readbuffer is always empty. I have a python code to test the sending application. import sys import socket s = socket.socket() address = '127.0.0.1' port = 4242 try: s.connect((address, port)) except Exception, e: sys.stdout.write('conn err %s:%d. exception: %s' % (address, port, `e`)) try: data = s.recv(1024) print data while True: more = s.recv(1024) print more if not more: break except Exception, e: sys.stdout.write('read err %s:%d. exception: is %s' % (address, port, `e`)) It works perfectly. As far as I know these the two code snippet should work the same. Clearly I'm missing something. Regards, Miklos

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GSoc 2k14
by Aman Jain 07 Jan '14

07 Jan '14

Hey, I wanna to do Gsoc this year by contributing to some C++ libraries and I am beginner. Actually, I want to contribute by modifying libraries I have once made some part of String library by myself using OOPS I have talked at IRC channel and according to my interest someone suggested me to contribute to https://github.com/boostorg/algorithm Can some one help me out how should I continue ? How to use git-hub here for contribution and bug fixing ? Regards, Aman

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[ANN] Registration for C++Now 2014 is Open
by Boris Kolpackov 07 Jan '14

07 Jan '14

Hi, Registration is now open for the eighth annual C++Now conference (formerly BoostCon) which will be held in Aspen, Colorado, USA, May 12th to 17th, 2014. C++Now is a general C++ conference for C++ experts and enthusiasts. It is not specific to any library/framework or compiler vendor and has three tracks with presentations ranging from hands-on, practical tutorials to advanced C++ design and development techniques. In particular, one of the tracks is dedicated exclusively to tutorials. Last year the conference sold out pretty quickly and we expect it to happen again this year. As a result, we encourage anyone interested in attending to register early. Additionally, early bird hotel reservations end January 10th. For more information on registering, visit: http://cppnow.org/2014/01/2014-registration-is-open/ For early bird hotel reservations, visit: http://cppnow.org/location/lodging/ For general information about the conference, visit: http://cppnow.org/about/ Boris

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[Boost Graph Library] read_graphviz example
by Robert Johannes Langenberg 07 Jan '14

07 Jan '14

Hello, I've recently started using the boost graph library to read a graph in dot format generated with pygraphviz and run some analysis on it. I get the basic example http://www.boost.org/doc/libs/1_55_0/libs/graph/doc/read_graphviz.html#exam… to compile, but it then segfaults when reading the file because it can't find the property "colors" (stack trace below). Now I understand that I didn't define this property but I also have no idea how to do it. Debugging it, i find the name="colors", key=0 and value="red" for the function call below: #11 0x000000010001b40c in boost::put<unsigned long, std::string> (name=@0x100205880, dp=@0x7fff5fbff5f8, key=@0x100204d78, value=@0x100205888) at dynamic_property_map.hpp:292 292 boost::shared_ptr<dynamic_property_map> new_map = dp.generate(name, key, value); For a general understanding of what's happening: What is "key" good for? In the example, where is the variable vertex_color declared? What is this "mass" property and why does it contain vertex_color? What is the type vertex_color_t? The documentation didn't help me, maybe there are easier starting points or i've just looked in the wrong parts of http://www.boost.org/doc/libs/1_55_0/libs/graph/doc/table_of_contents.html If someone could point me to a proper example/tutorial/documentation it'd be greatly appreciated. Best regards, Robert Langenberg Stacktrace: Program received signal SIGABRT, Aborted. 0x00007fff971e8d46 in __kill () (gdb) where #0 0x00007fff971e8d46 in __kill () #1 0x00007fff8fa28f83 in abort () #2 0x00007fff8f35c9eb in abort_message () #3 0x00007fff8f35a39a in default_terminate () #4 0x00007fff8df32887 in _objc_terminate () #5 0x00007fff8f35a3c9 in safe_handler_caller () #6 0x00007fff8f35a424 in std::terminate () #7 0x00007fff8f35b58b in __cxa_throw () #8 0x0000000100016eae in boost::throw_exception<boost::exception_detail::error_info_injector<boost::property_not_found> > (e=@0x7fff5fbfedb8) at throw_exception.hpp:70 #9 0x0000000100016ff0 in boost::exception_detail::throw_exception_<boost::property_not_found> (x=@0x7fff5fbfee90, current_function=0x100061188 "boost::shared_ptr<boost::dynamic_property_map> boost::dynamic_properties::generate(const std::string&, const Key&, const Value&) [with Key = long unsigned int, Value = std::basic_string<char, std::cha"..., file=0x100061008 "/Users/rlangenb/workspace/boost_1_55_0/boost/property_map/dynamic_property_map.hpp", line=268) at throw_exception.hpp:87 #10 0x000000010001ae6e in boost::dynamic_properties::generate<unsigned long, std::string> (this=0x7fff5fbff5f8, name=@0x100205880, key=@0x100204d78, value=@0x100205888) at dynamic_property_map.hpp:268 #11 0x000000010001b40c in boost::put<unsigned long, std::string> (name=@0x100205880, dp=@0x7fff5fbff5f8, key=@0x100204d78, value=@0x100205888) at dynamic_property_map.hpp:292 #12 0x000000010000bf4a in boost::detail::graph::mutate_graph_impl<boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, boost::property<boost::vertex_name_t, std::string, boost::property<boost::vertex_color_t, float, boost::no_property> >, boost::property<boost::edge_weight_t, double, boost::no_property>, boost::property<boost::graph_name_t, std::string, boost::no_property>, boost::listS> >::set_node_property (this=0x7fff5fbff340, key=@0x100205880, node=@0x1002063d0, value=@0x100205888) at graphviz.hpp:775 #13 0x000000010001f006 in boost::read_graphviz_detail::translate_results_to_graph (r=@0x7fff5fbff140, mg=0x7fff5fbff340) at read_graphviz_new.cpp:770

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Re: [Boost-users] [graph][BGL][PBGL] Use of dynamic_properties in parallel
by bminano 07 Jan '14

07 Jan '14

I have found the problem. It seems a cast problem in the dynamic_properties class. I have proposed a patch in the Ticket #9549. I am sorry, I am new to proposing patches so maybe that was not the correct way. -- View this message in context: http://boost.2283326.n4.nabble.com/graph-BGL-PBGL-Use-of-dynamic-properties… Sent from the Boost - Users mailing list archive at Nabble.com.

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How to create distributed_property_map
by Николай Кинаш 05 Jan '14

05 Jan '14

Hello. I try to calculate brandes_betweenness_centrality. #include <boost/graph/use_mpi.hpp> #include <boost/mpi/environment.hpp> #include <boost/mpi/communicator.hpp> #include <boost/graph/distributed/mpi_process_group.hpp> #include <boost/graph/parallel/process_group.hpp> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/distributed/adjacency_list.hpp> #include <boost/graph/small_world_generator.hpp> #include <boost/random/linear_congruential.hpp> #include <boost/graph/distributed/betweenness_centrality.hpp> #include <boost/graph/distributed/graphviz.hpp> #include <boost/graph/rmat_graph_generator.hpp> #include <boost/random/linear_congruential.hpp> #include <iostream> #include <algorithm> #include <math.h> using namespace boost; using namespace graph; using namespace distributed; namespace mpi = boost::mpi; typedef boost::adjacency_list<listS, distributedS<mpi_process_group,vecS>, undirectedS> Graph; typedef boost::unique_rmat_iterator<boost::minstd_rand, Graph> RMATGen; struct no_self_loops { no_self_loops() {} bool operator()(const std::pair<int,int>& e) { return e.first != e.second; } }; int main(int argc, char* argv[]) { boost::mpi::environment env(argc, argv); boost::minstd_rand gen; unsigned int SCALE = atoi(argv[1]); unsigned int EDGE_FACTOR = atoi(argv[2]); unsigned int N = pow(2, SCALE); unsigned int E = EDGE_FACTOR * N; Graph g( boost::make_filter_iterator<no_self_loops> ( RMATGen(gen, N, E, 0.45, 0.15, 0.15, 0.25), RMATGen()), boost::make_filter_iterator<no_self_loops>(RMATGen(), RMATGen()), N); typedef boost::property_map<Graph, vertex_index_t>::type LocalMap; boost::parallel::distributed_property_map<mpi_process_group, LocalMap, ||||||> centrality_map; //brandes_betweenness_centrality(g, centrality_map); } What should be here "|||||" ? I see http://www.boost.org/doc/libs/1_55_0/libs/graph_parallel/doc/html/distribut… template<typename ProcessGroup, typename LocalPropertyMap, typename Key, typename GhostCellS = gc_mapS> Key: The key_type of the distributed property map, which must model the Global Descriptor concept But don`t understand, is not work - typedef property_traits<LocalMap>::key_type key_type; Can you provide example?

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Is there a 1 line wonder for counting iterator and back_inserter - say a counting iterator where the start and step can be specified?
by Brian Davis 05 Jan '14

05 Jan '14

Is there a 1 line wonder for counting iterator and back_inserter - say a counting iterator where the start and step can be specified? The following code creates an vector of angles from zero to N-1 * angle step; std::vector angles; float angle_step = 0.275; int number_angles = 293; std::copy( boost::counting_iterator<float>(0), boost::counting_iterator<float>(number_angles), std::back_inserter(angles) ); std::copy( boost::make_transform_iterator(angles.begin(), boost::bind1st(std::multiplies<float>(), angle_step )), boost::make_transform_iterator(angles.end(), boost::bind1st(std::multiplies<float>(), angle_step )), angles.begin() ); Is there or could there be a counting iterator or other mechanism to do this in 1 line? Say where the start and step could be specified? Thanks

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Re: [Boost-users] Boost-users Digest, Vol 3673, Issue 1
by Markus Lenger 04 Jan '14

04 Jan '14

Hi Larry! The error must be somewhere else in your code. The following program behaves exactly as expected: #include <boost/regex.hpp> #include <string> #include <iostream> int main() { boost::match_results<std::string::const_iterator> match; boost::match_flag_type flags = boost::match_default; boost::regex re(std::string("^XXX_(\\d{3})_\\d{3}$"), boost::regex::perl | boost::regex::icase); std::string the_text = "XXX_123_456"; bool rc = boost::regex_search(the_text,match,re,flags); if (rc) { std::cout << "Number is " << match[1] << std::endl; return 0; } std::cout << "No match found" << std::endl; return 1; } --------- max@switters:~/tmp$ g++ test_regex.cpp -l boost_regex max@switters:~/tmp$ ./a.out Number is 123 Am 2014-01-03 18:00, schrieb boost-users-request(a)lists.boost.org: > Message: 1 > Date: Thu, 2 Jan 2014 16:40:55 -0500 > From: "Larry" <lknain(a)nc.rr.com> > To: <boost-users(a)lists.boost.org> > Subject: [Boost-users] [Regex] Subexpression matching during search > Message-ID: <D06A753E760144CDA0A00B03E0D0DFEE@XV2W> > Content-Type: text/plain; charset="utf-8" > > I have probably missed something in the doc that answers my query but I just can?t see it. > > This is using Perl syntax. > > I had a regex: > > ^(XXX_\d{3,3})_\d{3,3}$ > > It compiles OK but does not match anything in a regex_search. If I remove the parenthesis > > ^XXX_\d{3,3}_\d{3,3}$ > > I get matches. Any clues as to what I am missing? > > > Extract of regex related code lines: > > reg.regex = new boost::regex(reg.reg,boost::regex::perl | boost::regex::icase); > > boost::match_results<string::const_iterator> match; > boost::match_flag_type flags = boost::match_default; > std::string::const_iterator xstart, xend; > > xrc = boost::regex_search(xstart,xend,match,*((*rgi).regex),flags); > > Larry

2 1

[Regex] Subexpression matching during search
by Larry 03 Jan '14

03 Jan '14

I have probably missed something in the doc that answers my query but I just can’t see it. This is using Perl syntax. I had a regex: ^(XXX_\d{3,3})_\d{3,3}$ It compiles OK but does not match anything in a regex_search. If I remove the parenthesis ^XXX_\d{3,3}_\d{3,3}$ I get matches. Any clues as to what I am missing? Extract of regex related code lines: reg.regex = new boost::regex(reg.reg,boost::regex::perl | boost::regex::icase); boost::match_results<string::const_iterator> match; boost::match_flag_type flags = boost::match_default; std::string::const_iterator xstart, xend; xrc = boost::regex_search(xstart,xend,match,*((*rgi).regex),flags); Larry

2 2

[ASIO] Async TCP/UDP server design help
by Terry Lazoki 02 Jan '14

02 Jan '14

I'm having hard time understanding the boost asio design and how i can use it to tackle my problem. My problem: Designing a tcp/udp server that is time efficient. 1. User sends packet through tcp 2. Server receives packet and processes it to build a large tree (n > 20000) 3. Server then parses the new tree and sends a summary packet through udp to another client Conditions/Limitations: - Has to be time efficient, receiving, processing and sending has to be done as fast as possible. - Processing the packet is heavy and can cause delays if its done in the same thread - Parsing the tree is also a little heavy when sending it through udp, can cause delays too Design 1 (2 threads): Thread 1: ASIO TCP and UDP. TCP receives packets and adds it to a circular buffer. While at the same time, processes the shared tree and sends packet through udp. Thread 2: Server grabs packet from circular buffer and processes it Some problems here: - I dont understand the async part here. What happens when tcp receives a packet, if the current thread is continuously parsing the tree and sending packets through udp. Do i need to separate the udp part to another thread? - I have 3 parts of the program that i need to run concurrently, well its really 2 parts and receiving packets through tcp. Any help is appreciated. Thanks,

3 2

Problems installing old BOOST version
by squid squid 02 Jan '14

02 Jan '14

Greetings Everyone I'm a phd student in chemometrics and drug design. I am fairly new to ubuntu C programing although I'm rather experienced in C programing in windows. I have recently come accross a number of codes written in 2005 which I'm interested in learning how they work. Those codes needs BOOST library to complie, however they won't compile on the newest BOOST version installed on my ubuntu 12.04. I set the gcc compiler on lenient so that it ignores all those error messages. The code did compile and ran afterwards. However, when I used GDB debugger to watch how the program flows I noticed that there are likely errors in the way the program runs probably due to using a different BOOST version rather than it's original. Hence I like to install the BOOST version corresponding to the code I downloaded. To do that, I installed Ubuntu 6.02 and downloaded BOOST 1.33.1 both of which were created in late 2005. I downloaded BOOST from: http://www.boost.org/users/history/ but I didnt found any detailed instruction on how to install it. Only vague description on using BOOST jam, I played around with BOOST jam for quite awhile and got roughly the installation outline as follows: -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Unpack the trazball in /usr/share/ goto the directory /usr/share/boost_1_33_1/tools/build/jam_src run the script ./build.sh the script creats an executable called bjam, copy that file into /usr/share/boost_1_33_1/ run bjam with: ./bjam "-sTOOLS=gcc" install -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* My problems starts when running the ./build.sh script, resulting in tons of error messages and no bjam file created. The errors look like: -*-*-*-*-*-*-*-*-*-*-*-*-*-* ... ... search.c:187: error too many arguments to function 'timestamp' In file included from subst.c:2: jam.h:398:24: error: sys/types.h: No such file or directory jam.h:399:23: error: sys/stat.h: No such file or directory ... ...lots more errors.... -*-*-*-*-*-*-*-*-*-*-*-*-* I would greatly appreciate any info on how to deal with this issue. Sincerely

1 0

Mysterious early data termination using filtering_iostreams zlib_compressor
by Kenneth Adam Miller 31 Dec '13

31 Dec '13

I'm using intel's pin tool (pintool.org) and the boost library's filtering_stream in order to compress data before it goes to a file. I already have functioning code that does that, but at the very end of the execution of the target, right before the PIN_AddFiniFunction callback gets executed the stream of bytes in the compressed version ends (I assume this because the decompressed version is generated by subsequently opening another filtering_stream and using a zlib_decompressor and reading the entire compressed file out). I don't know why the stream ends early... This makes getting help kind of hard, because the files that are being produced are hundreds of megabytes, and differ by just a little kb. So even the diff is large, but I think the salient point is that the data included in the compressed/decompressed version is the same aside from the end. To make this easy for anybody helping, I've included a link to my repo where I've created a reproducible mini example, which should be able to be downloaded, built, and run without any hassel on the latest ubuntu: https://github.com/KennethAdamMiller/Boost-PinTool (It's a drop in replacement for debug trace; you just drop the appropriate files into the DebugTrace folder in your PIN_ROOT/source/tools/, then type make. There are very clear instructions! :) ) link to boost's filtering_stream: http://www.boost.org/doc/libs/1_54_0/libs/iostreams/doc/classes/filtering_s… After you build and run the tool, you should see debugtrace.out and decompressed.xml (the xml part I'm too lazy to change even as I type; it's just text). Go to the bottom of each, you can see that debugtrace.out ends with the line containing "eof" properly, but that the decompressed.xml does not... Can anybody tell me what the issue is? I'm quite certain that everything *should* have went into the FilteringStream that went into the ofstream... please help, I have no idea why it's terminating this way...

1 0

Matrix Vector Multiplication in MPI (Coordinate Storage Format)
by ozhan fenerci 30 Dec '13

30 Dec '13

I wrote a serial code for a matrix-vector multiplication in a Coordinate Storage Format(COO). COO method has already made a big speed-up. My matrix is in a tridiagonal form. I want to parallelize the code and see how the parallelizm improves the code. My matrix could grow up to 2.000.000*2.000.000. Any efficient parallelization approach doesn't come to my mind (I have written some basic mpi programs but not much more. So my experience is limited.) Could you give me some headstart? Thanks. Özhan Fenerci #include <boost/numeric/ublas/banded.hpp> #include <boost/numeric/ublas/io.hpp> #include <vector> #include <iostream> #include "mpi.h" #include <stdio.h> int main(int argc, char *argv[] ) { using namespace boost::numeric::ublas; using std::cout; using std::endl; int numprocs, rank, chunk_size, i,j; int max, mymax,rem; int totalNonZeros; //totalNonZeros of TriDiagonal Matrix MPI_Status status; //b=A*x banded_matrix<double> A (10, 10, 1, 1); //vector<double> x(10); //vector<double> b(10); int* x = new int[10]; int* b = new int[10]; /* Initialize MPI */ MPI_Init( &argc,&argv); MPI_Comm_rank( MPI_COMM_WORLD, &rank); MPI_Comm_size( MPI_COMM_WORLD, &numprocs); //MPI_Status status; if (rank == 0) { for (signed i = 0; i < signed (A.size1 ()); ++ i) { for (signed j = std::max (i - 1, 0); j < std::min (i + 2, signed (A.size2 ())); ++j) A (i, j) = i + j; x[i]= 1; } } if(rank == 0) { cout << A <<endl<<endl; totalNonZeros = 0; for (signed i = 0; i < signed (A.size1 ()); ++ i) { for (signed j = std::max (i - 1, 0); j < std::min (i + 2, signed (A.size2 ())); ++ j) if( A(i,j) !=0) totalNonZeros++; } } cout<<"Number ot NonZeros "<<totalNonZeros<<endl; if(rank == 0) { int * row_idx = new int[totalNonZeros]; // row index array int * col_idx = new int[totalNonZeros]; // col index array int * val = new int[totalNonZeros]; //val array int index=0; for (signed i = 0; i < signed (A.size1 ()); ++ i) { for (signed j = std::max (i - 1, 0); j < std::min (i + 2, signed (A.size2 ())); ++ j) if( A(i,j) !=0) { row_idx[index] = i; col_idx[index]=j; val[index] = A(i,j); index++; } } //Clear out result for ( int k=0; k<A.size1(); ++k) { b[k]= 0; } //Matrix-vector Multiply for (int index=0 ; index <totalNonZeros;++index){ b[row_idx[index]] = b[row_idx[index]]+ val[index]*x[col_idx[index]]; cout<<b[3]<<endl; } //delete row_idx; // delete col_idx; //delete val; } MPI_Finalize(); return 0;

2 1

unit and functional testing of boost statechart
by rahul baruah 29 Dec '13

29 Dec '13

Hello All, I like to do unit and functional testing of our implemented statemachine written using boost - statechart. Is there any framework for that?? anyone did any unit testing and suggestion?? Regards Rahul Protim Baruah

2 1

[Boost] Command Line to run a specific Boost Test Case using BOOST_AUTO_TEST_CASE_TEMPLATE
by Hemanth Choudary M V (RBEI/ETA1) 29 Dec '13

29 Dec '13

Hi, I would like to run this boost test case using the command line. Please note that the list contains data types that have 2 or more words. I need to know what to pass in the Command Line for -run_test=__________ #define BOOST_TEST_MODULE example #include <boost/test/included/unit_test.hpp> #include <boost/test/test_case_template.hpp> #include <boost/mpl/list.hpp> //____________________________________________________________________________// typedef boost::mpl::list<long long,unsigned char> test_types; BOOST_AUTO_TEST_CASE_TEMPLATE( my_test, T, test_types ) { BOOST_CHECK_EQUAL( sizeof(T), (unsigned)4 ); } //_ Mit freundlichen Grüßen / Best Regards, Hemanth Choudary MV RBEI/ETA1

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Re: [Boost-users] [serialization] Registering/exporting shared_ptr<T> in a library
by Martin Weinberg 29 Dec '13

29 Dec '13

On 12/28/2013 06:34 PM, Robert Ramey wrote: > > > On Saturday, December 28, 2013 2:15:44 PM UTC-8, Martin Weinberg wrote: > > I have a shared library for derived and base classes. My code passes > instances of derived classes T using boost::shared_ptr<B> to the base > class. This all works as expected. > > I've used the BOOST_CLASS_EXPORT_KEY and BOOST_CLASS_EXPORT_IMPLEMENT > macros to register both the classes Tand shared_ptr<T> typedefs to > all > the classes. > > If I attempt to serialize a base class pointer, > boost::serialization can > not find the serialize member for the shared_ptr to the derived > class. > > > a) double check the documentation boost/serialization/case > studies/shared_ptr<T> revisited > > b) Make sure you'r doing the following > > class A {...}; > class B : public A {...} > ... > A * = new B; // note we create a B and cast the address to an A* !!! > > ... should be no problem from here on out. > > Robert Ramey Thanks. What I'm doing is: shared_ptr<A> t(new B); and then: ar & A; It's ok if I put: BOOST_CLASS_EXPORT(shared_ptr<A>) BOOST_CLASS_EXPORT(shared_ptr<B>) in the caller but not if I put them in the library. Trying to understand if there's a way to put registration in the library rather than the main source.

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[serialization] Registering/exporting shared_ptr<T> in a library
by Martin Weinberg 28 Dec '13

28 Dec '13

I have a shared library for derived and base classes. My code passes instances of derived classes T using boost::shared_ptr<B> to the base class. This all works as expected. I've used the BOOST_CLASS_EXPORT_KEY and BOOST_CLASS_EXPORT_IMPLEMENT macros to register both the classes Tand shared_ptr<T> typedefs to all the classes. If I attempt to serialize a base class pointer, boost::serialization can not find the serialize member for the shared_ptr to the derived class. However, if I don't register the shared_ptr<T> for each derived class T in the shared library, but instead use BOOST_EXPORT_CLASS(shared_ptr<T>) in main(), everything works fine. Is there a workaround so that I don't need BOOST_EXPORT_CLASS(shared_ptr<T>) in main() for every possible derived class? Thanks. I can provide a trivial example that illustrates this issue if that would help.

1 0

Boost [Regex] (grep Falg) Why doesn't this pattern match?
by Asmita Gaikwad 27 Dec '13

27 Dec '13

Hi, Environment: Windows 7 (32 bit), Visual Studio 2010 (Visual C++) I am trying to use Boost REGEX regex_match algorithm. I am using its grep flag. My code is as follows and here (a)* matches string "aaa", but still b comes out to be false. 1 2 3 4 5 6 7 8 9 10 11 bool MatchWithGrep(string& pattern, string& data) { const boost::regex e(pattern.c_str(), boost::regex::grep); return regex_match(data.c_str(), e); } I am passing following parameters bool b = MatchWithGrep("(a)*\\n123", "aaa"); In Boost Help, following is documented. Link - http://www.boost.org/doc/libs/1_55_0/libs/regex/doc/html/boost_regex/syntax/ basic_syntax.html When an expression is compiled with the flag grep set, then the expression is treated as a newline separated list of POSIX-Basic expressions, a match is found if any of the expressions in the list match, for example: boost::regex e("abc\ndef", boost::regex::grep); will match either of the POSIX-Basic expressions "abc" or "def". Considering this, in my example i have 2 basic expressions (a)* and 123. (Since its c++ string \\n <file:///\\n> will be taken as \n internally. I had debugged the code and i can see value of variable pattern as "(a)*\n123" in watch window). Presence of any should give me bool b as true. And my data is "aaa". So it should give true. But i am getting false. Can anyone help me to find what's wrong with my code? Thanks & Regards, Asmita EDISPHERE Software Private Limited Email: asmita.gaikwad(a)edisphere.com| Website: <http://www.edisphere.com/> http://www.edisphere.com

3 2

filesystem temp_directory_path() returns undefined data
by Philipp Kraus 26 Dec '13

26 Dec '13

Hello, I have build Boost 1.55 on OSX 10.8.5 and I have written a short example to get the temporary path of my system. So I run std::cout << temp_directory_path() << std::endl, and it results "B?@?e/test/libboost_hA?@??%UP^?" I have build Boost with bjam myself and otool results the correct linked file. How can I solved the error? Thanks a lot Phil

1 0

compilation
by Mihir Thakkar 25 Dec '13

25 Dec '13

hello all i cloned the git repository by following command. i use ubuntu12.10 1) git clone --recursive https://github.com/boostorg/boost.git modular-boost 2) ./bootstrap.sh 3) ./b2 headers after this on running the following command for separately compiled libraries, 4) ./b2 and i got the error like following. gcc.compile.c++ bin.v2/libs/iostreams/build/ gcc-4.7/release/link-static/threading-multi/bzip2.o libs/iostreams/src/bzip2.cpp:20:56: fatal error: bzlib.h: No such file or directory compilation terminated. "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_IOSTREAMS_USE_DEPRECATED -DNDEBUG -I"." -c -o "bin.v2/libs/iostreams/build/gcc-4.7/release/link-static/threading-multi/bzip2.o" "libs/iostreams/src/bzip2.cpp" ...failed gcc.compile.c++ bin.v2/libs/iostreams/build/gcc-4.7/release/link-static/threading-multi/bzip2.o... ...skipped <pbin.v2/libs/iostreams/build/gcc-4.7/release/link-static/threading-multi>libboost_iostreams.a(clean) for lack of <pbin.v2/libs/iostreams/build/gcc-4.7/release/link-static/threading-multi>bzip2.o... ...skipped <pbin.v2/libs/iostreams/build/gcc-4.7/release/link-static/threading-multi>libboost_iostreams.a for lack of <pbin.v2/libs/iostreams/build/gcc-4.7/release/link-static/threading-multi>bzip2.o... ...skipped <pstage/lib>libboost_iostreams.a for lack of <pbin.v2/libs/iostreams/build/gcc-4.7/release/link-static/threading-multi>libboost_iostreams.a... gcc.compile.c++ bin.v2/libs/iostreams/build/gcc-4.7/release/threading-multi/bzip2.o libs/iostreams/src/bzip2.cpp:20:56: fatal error: bzlib.h: No such file or directory compilation terminated. "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pthread -fPIC -DBOOST_ALL_NO_LIB=1 -DBOOST_IOSTREAMS_DYN_LINK=1 -DBOOST_IOSTREAMS_USE_DEPRECATED -DNDEBUG -I"." -c -o "bin.v2/libs/iostreams/build/gcc-4.7/release/threading-multi/bzip2.o" "libs/iostreams/src/bzip2.cpp" ...failed gcc.compile.c++ bin.v2/libs/iostreams/build/gcc-4.7/release/threading-multi/bzip2.o... ...skipped <pbin.v2/libs/iostreams/build/gcc-4.7/release/threading-multi>libboost_iostreams.so.1.55.0 for lack of <pbin.v2/libs/iostreams/build/gcc-4.7/release/threading-multi>bzip2.o... ...skipped <pstage/lib>libboost_iostreams.so.1.55.0 for lack of <pbin.v2/libs/iostreams/build/gcc-4.7/release/threading-multi>libboost_iostreams.so.1.55.0... ...skipped <pstage/lib>libboost_iostreams.so for lack of <pstage/lib>libboost_iostreams.so.1.55.0... ...failed updating 2 targets... ...skipped 6 targets... i would appreciate if someone would guide me how to solve the problem. thank you!

2 1

[program_options] with DOxygen?
by Mauricio Carneiro 25 Dec '13

25 Dec '13

I am writing a tool with command line options coordinated by boost program options. The API is well documented with Doxygen, but I would like Doxygen to also document the command line options for the tools extracting the information from the boost program_options variables. This would make the HTML useful also for the users, not just the developers. Does anyone know if there is such an integration between boost program_options and doxygen? If not, is there some other tool out there that produces HTML command line usage based on boost program_options? Merry christmas! Mauricio Carneiro, Ph.D. http://www.broadinstitute.org/~carneiro/

1 0

STL MAP Insertion and Updates ..!!
by Rahul Mathur 25 Dec '13

25 Dec '13

Hi, Looking for clue for below. Having a code which has to be inserted and updated with following status - 1. Insert with unique ID and initially with two values (viz . v1[1100] & v2[1000]) 2. If v1 [viz 1100] is NOT accepted exit. 3. Else value v2[1000] is accepted. With v2 being accepted, further insert with same unique ID on which v2 was accepted but now either with three values of v3[1001] or v4[1002] or v5[1003] and UPDATE the STL MAP. 4. Print the FINAL value (v2 or v3 or v5) of STL MAP with given unique ID. Did wrote below lines which works until value v1 [1000] insertion - --- #include <iostream> #include <algorithm> #include <map> #include <iterator> using namespace std; struct TBag { int UnqID; short value_code; TBag():UnqID(1234),value_code(1000){} }; TBag ms_var1; typedef std::map<int, short> map1; class Apple { map1 abc; public: void TypeInsert ( TBag *ms_var ); }; void Apple::TypeInsert ( TBag *ms_var ) { // Insert the 'UnqID' with messages of either TC = 1000 or 1100 only. typedef std::pair <map1::iterator, bool> itr; itr it1 = abc.insert( std::make_pair( ms_var->UnqID, ms_var->value_code ) ); typedef std::pair <map1::iterator, bool> itr; //Searching for value of Value Code = 1000 if (ms_var->value_code == 1100) { std::cout << "Value Error." << endl; exit (1); } if (it1.second) { // Checking correct insertion happened with 1000 std::cout << "Unq ID (" << it1.first->first << ") => " << "Value Code (" << it1.first->second << ")" << endl; std::cout << "The Status is .." << it1.first->first << " & " << it1.first->second << endl ; // INSERT now with Value code of either 1001 or 1002 or 1003 & finally UPDATE the STL MAP std::cout << "Final Status:" << endl ; for( map<int, short>::iterator iter = map1.begin(); iter != map1.end(); ++iter ) std::cout << iter->first << " " << iter->second << endl ; std::cout << "All Status successful." << endl; } else std::cout << "Status Error." << endl; } int main () { Apple ms; ms.TypeInsert( &ms_var1 ); return 0; } --- Any help is well appreciated ..:) ~ XoXo

2 1

Re: [Boost-users] How to use the optional with property_tree‏
by 王郁槐 25 Dec '13

25 Dec '13

I still don't understand，could you please figure it out？thanks. 发送自魅族手机 -------- 原始邮件 -------- 发件人：Olivier Tristan <o.tristan(a)uvi.net> 时间：周四 12月19日 22:08 收件人：boost-users(a)lists.boost.org 主题：Re: [Boost-users] How to use the optional with property_tree‏ >Those following lines from your code should give you a hint > >if (child2) >{ >child2.get().put_value(strValue); >} >else >{ >child2.get().put_value(strValue); >} > > > >Le 19/12/2013 12:34, 王郁槐 a écrit : >> Could anyone help? Why the below code will crash on the below line? I'm using the boost property_tree. Thanks. >> >> child1.get().put(sub_field, strValue); >> >> ========================================================= >> #include <fstream> >> #include <boost/filesystem.hpp> >> #include <boost/property_tree/ptree.hpp> >> #include <boost/property_tree/ini_parser.hpp> >> #include <boost/any.hpp> >> #include <boost/optional.hpp> >> >> void writeConfig(const std::string &field, const std::string &sub_field, const std::string & strValue) >> { >> if (!boost::filesystem::exists(prog_cfg_file)) >> { >> std::ofstream ofIniConfig(prog_cfg_file, std::ofstream::out|std::ofstream::app); >> ofIniConfig.close(); >> } >> >> >> boost::property_tree::ptree pt; >> boost::property_tree::ini_parser::read_ini(prog_cfg_file, pt); >> boost::optional<boost::property_tree::ptree&> child1 = pt.get_child_optional(field); >> >> if (child1) >> { >> boost::optional<boost::property_tree::ptree&> child2 = child1.get().get_child_optional(sub_field); >> >> if (child2) >> { >> child2.get().put_value(strValue); >> }else >> { >> child2.get().put_value(strValue); >> } >> }else >> { >> child1.get().put(sub_field, strValue); >> } >> >> boost::property_tree::ini_parser::write_ini(prog_cfg_file, pt); >> } >> >> int main() >> { >> writeConfig("test", "a", "OK"); >> return 0; >> } >> >> >> >> >> -- >> 兰生幽谷, 不以无人而不芳... >> >> >> >> >> _______________________________________________ >> Boost-users mailing list >> Boost-users(a)lists.boost.org >> http://lists.boost.org/mailman/listinfo.cgi/boost-users > > >-- >Olivier TRISTAN >uvi.net > >_______________________________________________ >Boost-users mailing list >Boost-users(a)lists.boost.org >http://lists.boost.org/mailman/listinfo.cgi/boost-users

2 2

[graph] boykov_kolmogorov_max_flow and reverse edges capacity
by Olivier Tournaire 21 Dec '13

21 Dec '13

Hi, I am trying to use boykov_kolmogorov_max_flow algorithm to find a minimum cut of some graph. To build the graph, I first create source and sink vertices. I then add some vertices, and connect them. Each time I create and edge, I also create the reverse edge: edge_descriptor_bool e01 = add_edge(v0, v1, _graph); edge_descriptor_bool e10 = add_edge(v1, v0, _graph); reverse[e01.first] = e10.first; reverse[e10.first] = e01.first; where reverse is: boost::property_map<Graph, boost::edge_reverse_t>::type reverse = get(boost::edge_reverse , _graph); I then fill edge capacity: capacity[e10.first] = this->getEnergy(fh, fh_v0); // Use policy to compute energy capacity[e01.first] = this->getEnergy(fh, fh_v0); // Use policy to compute energy My question is how capacity of reverse edge has to be computed. The doc states that reverse edge can carry capacities different than 0, but should they be the same as their parallel edge? Note that I use the algorithm with this method: _minEnergy = boykov_kolmogorov_max_flow(_graph, _source, _sink); Any help would be appreciated. Regards, Olivier

2 1

BGL: using short integer as vertex_descriptor
by Adam Celick 21 Dec '13

21 Dec '13

Hi, I am using the graph library in a memory constrained environment. By default vertex_descriptor for an adjacency_list (of vectors, i.e. vecS, vecS) seems to be std::size_t. I was wondering if there's a way to use say uint16_t for the vertex_descriptor? Thanks, -Adam

2 1

[boost.test] Unable to perform init at startup
by Adam Nielsen 21 Dec '13

21 Dec '13

Hi all, I'm having a bit of a problem trying to figure out how to perform some class init while manually registering my tests.

1 0

[boost.asio] Concurrently Ping 1000+ Hosts
by Kyle Ketterer 21 Dec '13

21 Dec '13

Hello, So the subject line pretty much says it all. Basically, I am trying to expand off of the icmp ping example given by the boost library documentation. I would like to ping 1000+ hosts in say, a matter of minutes rather than a matter of hours. I have already expanded the class shown here: http://www.boost.org/doc/libs/1_40_0/doc/html/boost_asio/example/icmp/ping.… Before I start posting code, I would like to discuss the strategy of trying to do this. In my Main thread, I was thinking about creating a vector of PingX objects. In the PingX class, I would have a separate io_service as well as wrap the async() functions in strands. I set the deadline timer at 800ms that way the io_service should return in less than a second. I would then call io_service run() in separate threads to *concurrently* ping these hosts. The problem appears to be that even through the async handers are wrapped in strands, there is data corruption. Is it true that when async handlers are wrapped in strands, they still cannot be executed *concurrently* ? My understanding of strand was that it serializes the handler functions to allow for thread safe access. However, I think that because I am accessing the same resources in multiple threads (such as the socket() object ), it is corrupting my expected output as well as occasionally throwing some exceptions. Are there any suggestions for the logic surrounding this or if this can be done in a multithreaded environment? Thanks! -- Kyle Ketterer

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Boost.Coroutine and Object Inheritance
by Carlos Ferreira 20 Dec '13

20 Dec '13

Hello to all. I need some help using the Boost.Coroutine lib. I wanted to use the coroutines as objects and for that, I tried to build a simple object and inherit the boost::coroutines::coroutine template. ex: class SimpleObj : public boost::coroutines::coroutine<SimpleObj>{ private: std::unique_ptr<boost::asio::ip::tcp::socket> tcpSkt_uPtr; std::unique_ptr<boost::asio::ip::tcp::acceptor> acc_uPtr; public: SimpleObj(std::shared_ptr<boost::asio::io_service> ioService_ptr, boost::asio::ip::tcp::endpoint &endPoint); ~SimpleObj(); void run(); }; Is this right? Can I actually inherit from the boost::coroutines::coroutine template ? If yes, how can I proceed from here, to use the run() object method as the coroutine itself, with an io_service provided through the constructor ? Thanks for any assistance! -- Carlos Miguel Ferreira Researcher at Telecommunications Institute Aveiro - Portugal Work E-mail - cmf(a)av.it.pt Skype & GTalk -> carlosmf.pt(a)gmail.com LinkedIn -> http://www.linkedin.com/in/carlosmferreira

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[git][testing] regression testing?
by Joaquín Mª López Muñoz 19 Dec '13

19 Dec '13

There's been some unanswered questions around this. I understand that regression tests, which are critical to ensure clean develop->master merges, will be eventually updated to work against git rather than the abandoned SVN, but I can't find any info on the progress of this. FWIW, I see some authors are going ahead and merging their libs anyway, which will bring breakages etc if changes are not properly validated through regression testing. Any indication on how this is progressing much appreciated. Best, Joaquín M López Muñoz Telefónica Digital ________________________________ Este mensaje se dirige exclusivamente a su destinatario. Puede consultar nuestra política de envío y recepción de correo electrónico en el enlace situado más abajo. This message is intended exclusively for its addressee. We only send and receive email on the basis of the terms set out at: http://www.tid.es/ES/PAGINAS/disclaimer.aspx

1 0

How to use the optional with property_tree‏
by 王郁槐 19 Dec '13

19 Dec '13

Could anyone help? Why the below code will crash on the below line? I'm using the boost property_tree. Thanks. child1.get().put(sub_field, strValue); ========================================================= #include <fstream> #include <boost/filesystem.hpp> #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/ini_parser.hpp> #include <boost/any.hpp> #include <boost/optional.hpp> void writeConfig(const std::string &field, const std::string &sub_field, const std::string & strValue) { if (!boost::filesystem::exists(prog_cfg_file)) { std::ofstream ofIniConfig(prog_cfg_file, std::ofstream::out|std::ofstream::app); ofIniConfig.close(); } boost::property_tree::ptree pt; boost::property_tree::ini_parser::read_ini(prog_cfg_file, pt); boost::optional<boost::property_tree::ptree&> child1 = pt.get_child_optional(field); if (child1) { boost::optional<boost::property_tree::ptree&> child2 = child1.get().get_child_optional(sub_field); if (child2) { child2.get().put_value(strValue); }else { child2.get().put_value(strValue); } }else { child1.get().put(sub_field, strValue); } boost::property_tree::ini_parser::write_ini(prog_cfg_file, pt); } int main() { writeConfig("test", "a", "OK"); return 0; } -- 兰生幽谷, 不以无人而不芳...

2 1

Caching the iterator of async_resolve()?
by Kaspar Fischer 18 Dec '13

18 Dec '13

Hi everybody, Just to be on the safe side: I assume that I can cache the iterator returned by async_resolve<http://www.boost.org/doc/libs/1_49_0/doc/html/boost_asio/reference/ip__basi…>'s handler, correct? The fact that it's a forward iterator suggests so... Thanks! Kaspar

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[MPL] How to generate pre-generated header files for a mpl::list containing more than 50 entries?
by Klaus.Kempf＠industronic.de 18 Dec '13

18 Dec '13

Hello MPL experts, I want to code a state machine which has a reaction list containing more than 50 entries. I found here [http://svn.boost.org/svn/boost/trunk/libs/mpl/preprocessed/] some python scripts to generate header files for a mpl::list containing more than 50 entries. But I cannot manage to generate a single header file. Can someone please explain to me how to use these scripts? I also didn't find any help in boost documention. Command line messages of the related script were also not helpful for me: preprocess_list.py Usage: preprocess_list.py <mode> <boost_root> [<source_file>] Purpose: updates preprocessed version(s) of the header(s) in "boost\mpl\list\aux_\preprocessed" directory Example: the following command will re-generate and update all 'apply.hpp' headers: preprocess_list.py all f:\cvs\boost apply.cpp What is the meaning of [<source_file>] here? And how/where do I have to specify the count of list entries in order to generate the header files "list60.hpp", "list70.hpp" and so on? Many thanks for any help you could provide. Best regards, Klaus

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async_send handler problem
by Alexander Carôt 17 Dec '13

17 Dec '13

Hello all, I am new to boost and asio in particular. For now I am implementing a simple UDP sender. The sending process itself works fine but for some reason the send handler does not execute. The call itself looks like this: In my class sender.cpp I have a functions called void sender::sendIt(){ sj->dFC->s->async_send_to(boost::asio::buffer( this->charBuffer,sendBytes), *sj->dFC->e, boost::bind(&sender::sendHandler,this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred); } and the corresponding handler is this: void sender::sendHandler(const boost::system::error_code& error,std::size_t bytes_transferred){ cout << "TRIGGER" << endl; } Can anyone give me a hint what the reason for the not-working handler might be ? Thanks in advance, best Alex

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[Asio] io_service(std::size_t concurrency_hint) constructor
by maks 16 Dec '13

16 Dec '13

Hello All In what cases using "io_service(std::size_t concurrency_hint)" ctor is more effective? 1. Use multiple threads - multiple io_service 2. Use multiple threads on one io_service object Thanks.

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Delegating to boost::function with arbitrary signature
by Alexander Lamaison 16 Dec '13

16 Dec '13

I've asked this question on Stack Overflow but not found a solution yet: http://stackoverflow.com/q/20578575/67013. It's Boost.Function/MPL-related so I'll ask here too. I'm trying to create something like a `boost::function`, but with an extra 'smart handle' tucked inside, which controls the lifetime of a resource the functions needs to execute correctly. If I didn't need the function signature to be completely generic, this would be easy. I would just create a functor with the correct signature, and keep a `boost::function` and the handle as members. However, I do need generic signatures. The code below is as close as I've got but gets a compile error, presumably, because I'm not able to unpack a list of arguments like this: template<typename Signature> class library_function { public: library_function( library_handle handle, boost::function<result_type(arg1_type, arg2_type)> function) : m_handle(handle), m_function(function) {} typename result_type operator()(arg1_type arg1, arg2_type arg2) { return m_function(arg1, arg2); } // I don't think I can declare the 'params' like this ... typename boost::function_types::result_type<Signature>::type operator()( boost::function_types::parameter_types<Signature> params) { return m_function(params); // ... nor unpack them like this } private: boost::function<Signature> m_function; library_handle m_library; }; I think `params` is an MPL list, so what I've actually done is declare a call operator with a single MPL-list parameter. My MPL-foo is not good. Is there a way to convert the list to a legal definition of multiple function paramters? A suggested solution on SO is to use `boost::bind`, but I still don't see how to bind an arbitrary number of arguments. All advice greatly appreciated. Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org)

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[asio][openssl]Boost SSL with Visual Studio 2012 and OpenSSL
by lx 16 Dec '13

16 Dec '13

hello: I use : windows 7 64bit, vs 2012 , boost 1.5.4 , Win64OpenSSL_Light-1_0_1e. the codes is: ######################## #include <boost/asio.hpp> #include <boost/asio/ssl.hpp> ######################## When I complie it, the wrong messages is: ########################################## 1>gtest.obj : error LNK2019: unresolved external symbol _CRYPTO_cleanup_all_ex_data referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _CRYPTO_num_locks referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _CRYPTO_set_locking_callback referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _CRYPTO_set_id_callback referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _CONF_modules_unload referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _OPENSSL_add_all_algorithms_noconf referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _EVP_cleanup referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _SSL_load_error_strings referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _SSL_library_init referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _ERR_reason_error_string referenced in function "public: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall boost::asio::error::detail::ssl_category::message(int)const " (?message@ssl_category@detail@error@asio@boost@@UBE?AV?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@H@Z) 1>gtest.obj : error LNK2019: unresolved external symbol _ERR_free_strings referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _ERR_remove_state referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>gtest.obj : error LNK2019: unresolved external symbol _ENGINE_cleanup referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>D:\program\gdnscenter-1.12.2\src\Debug\gtest.exe : fatal error LNK1120: 13 unresolved externals ========== Build: 0 succeeded, 1 failed, 3 up-to-date, 0 skipped ========== ########################################## the simiar question in stackoverflow : http://stackoverflow.com/questions/9357751/boost-ssl-with-visual-studio-201… . I use the openssl win64. So, Maybe a bug in asio? Thank you.

2 1

Crash in VS2013, bug in compiler, boost or my code ? (flyweight, variant and initializer list)
by Olivier Tristan 16 Dec '13

16 Dec '13

Hello Boost users, Using the following sample code I have some crash in VS2013 but it works fine in LLVM on OSX Is this is a mistake on my side or an issue elsewhere ? #include <string> #include <cstdint> #include <vector> #include <boost/flyweight/flyweight.hpp> #include <boost/flyweight/no_tracking.hpp> #include <boost/flyweight/static_holder.hpp> #include <boost/flyweight/set_factory.hpp> #include <boost/flyweight/simple_locking.hpp> #include <boost/variant.hpp> typedef boost::flyweights::flyweight< std::string, boost::flyweights::no_tracking, boost::flyweights::set_factory<>, boost::flyweights::static_holder, boost::flyweights::simple_locking > string_flyweight; typedef boost::variant< bool, double, string_flyweight > Variant; int main(void) { std::vector<Variant> v = { 1., true, string_flyweight("toto") }; return 0; } Thanks, -- Olivier TRISTAN uvi.net

5 8

library choice
by Mihir Thakkar 15 Dec '13

15 Dec '13

I am new to boost. I would like to contribute to development. I looked through the libraries and got confused from where to start understanding and reading such a large codebase. Is it that all the libraries are independent of each other and I've to look at only those which I want to work with? Please guide me on how to begin understanding. Thanks! :)

3 2

Boost Geometry - RTree with 1D Segments
by Adam Baxter 14 Dec '13

14 Dec '13

Hello all, I've been using boost::icl for interval searching. So far it's been working great. I am using it for closed interval searches for chemical masses. Unfortunately, I've reached a point where I've too much data, I think. The use of sets has started to kill my memory usage. I'd like to switch over to Boost::Geometry, but there's precious little about indexing 1D segments (I don't even mind 2D segments). Can someone point me in the right direction? Thanks! Adam

1 0

Threading question
by Davies, John 13 Dec '13

13 Dec '13

I have the following code and it terminates as expected. When I call the destructor it interrupts the thread. But if I change the this_thread::sleep to this_thread::yield the join() never happens and the program hangs. I must be misunderstanding yield. But I really don't want a sleep if possible. Thanks, John MessageQueueHandler::~MessageQueueHandler() { // Terminate the thread pMessageQueueInputThread->interrupt(); pMessageQueueInputThread->join(); delete pMessageQueueInputThread; } void MessageQueueHandler::MessageQueueInputThread() { unsigned int receivedSize; unsigned int priority; char buffer[queueMaximumMessageSize]; boost::this_thread::interruption_enabled(); try { while(1) { // Process all messages in the queue while(inputMessageQueue->try_receive(buffer, queueMaximumMessageSize, receivedSize, priority)) { BaseMessage * msg = reinterpret_cast<BaseMessage*>(buffer); callbackTable->DispatchMessage(msg); boost::this_thread::interruption_point(); } // Give other threads a chance to run // This is also an interruption point boost::this_thread::sleep(boost::posix_time::millisec(50)); <==Here } } catch(boost::thread_interrupted const&) { return; } } ___________________________________ John Davies Contractor Home Respiratory Care Philips Home Healthcare Solutions 1740 Golden Mile Highway Monroeville, PA 15146 Email: john.davies(a)philips.com Fax: 724-387-4109 ________________________________ The information contained in this message may be confidential and legally protected under applicable law. The message is intended solely for the addressee(s). If you are not the intended recipient, you are hereby notified that any use, forwarding, dissemination, or reproduction of this message is strictly prohibited and may be unlawful. If you are not the intended recipient, please contact the sender by return e-mail and destroy all copies of the original message.

4 5

[Spirit/Qi/Phoenix] non compiling rules...
by Francois Mauger 12 Dec '13

12 Dec '13

Dear Boosters, The following code is one of my first attempts to use Spirit/Qi. For my education, I have tried 2 techniques to parse the simple "aaa=131;" string. The first one (Block A) compiles and seems to output the expected result. The second (B) does not compile with a huge massively templatized backtrace that I don't understand. What is the difference between using online rules and rule objects ? Is there a syntax error somewhere ? I'm afraid the documentation and example are rather terse about the syntax to be used here when coupling Qi and Phoenix... Many thanks for your help. best regards frc -- <pre> #include <iostream> #include <string> #include <vector> // - Boost/Spirit #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/phoenix_core.hpp> #include <boost/spirit/include/phoenix_operator.hpp> int main( int argc_, char * argv_[]) { int error_code = EXIT_SUCCESS; using boost::spirit::qi::double_; using boost::spirit::qi::string; using boost::spirit::qi::lit; using boost::spirit::qi::lexeme; using boost::spirit::qi::phrase_parse; using boost::spirit::qi::_1; using boost::spirit::qi::as_string; using boost::spirit::ascii::space; using boost::spirit::ascii::char_; using boost::phoenix::ref; { // Block A /// This compiles: std::string s = "aaa=131;"; std::cout << "s: '" << s << "'" << std::endl; std::string::iterator strbegin = s.begin(); std::vector<char> vkey; std::vector<char> vvalue; bool r = phrase_parse( strbegin, s.end(), (+(char_ - '='))[boost::phoenix::ref(vkey) = boost::spirit::qi::_1 ] >> '=' >> *space >> lexeme[+(char_ - ';')][boost::phoenix::ref(vvalue) = boost::spirit::qi::_1 ], space ); if (r) { std::string key(vkey.begin(), vkey.end()); std::string value(vvalue.begin(), vvalue.end()); std::cout << "key : '" << key << "'" << std::endl; std::cout << "value : '" << value << "'" << std::endl; } } { /// Block B /// This doesn't: std::string s = "aaa=131;"; std::cout << "s: '" << s << "'" << std::endl; std::string::iterator strbegin = s.begin(); std::vector<char> vkey; std::vector<char> vvalue; boost::spirit::qi::rule<std::string::iterator> key_rule = +(char_ - '='); boost::spirit::qi::rule<std::string::iterator> value_rule = lexeme[+(char_ - ';')]; bool r = phrase_parse( strbegin, s.end(), key_rule[boost::phoenix::ref(vkey) = boost::spirit::qi::_1 ] >> '=' >> *space >> value_rule[boost::phoenix::ref(vvalue) = boost::spirit::qi::_1 ], space ); if (r) { std::string key(vkey.begin(), vkey.end()); std::string value(vvalue.begin(), vvalue.end()); std::cout << "key : '" << key << "'" << std::endl; std::cout << "value : '" << value << "'" << std::endl; } } return error_code; } </pre> -- François Mauger

3 4