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[msm] interrupt_state with more then one event that ends interrupt?
by Sam Fisher 09 Jul '13

09 Jul '13

Hi, Subj, Is that possible? for example, one event continues processing, the another one finishes the whole state-machine (some clean-up actions etc). I tried struct Interrupt : public msmf::interrupt_state< boost::mpl::vector<Foo, Bar> > {}; and struct Interrupt : public msmf::interrupt_state< msmf::ActionSequence_< boost::mpl::vector<Foo, Bar> > > {}; - has no effect. Is there another way to achieve this?

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Boost.MultiIndex template substitution failure?
by fredbaba 08 Jul '13

08 Jul '13

I'm attempting to use boost::multi_index_container and it seems to be choking on the template metaprogramming magic somewhere. I'm getting a massive error dump ending in: /opt/local/include/boost/multi_index/hashed_index.hpp:743:9: error: ‘class boost::multi_index::detail::hashed_index, boost::hash, std::equal_to, boost::multi_index::detail::nth_layer<1, boost::intrusive_ptr, boost::multi_index::indexed_by >, boost::multi_index::ordered_non_unique, &md::Order::px> > >, std::allocator > >, boost::mpl::vector0, boost::multi_index::detail::hashed_unique_tag>’ has no member named ‘final_delete_node_’ this->final_delete_node_( I'm using Boost 1.53 (MacPorts) on Mac OS X.8 Mountain Lion. How do I get the following code to compile? Thanks. p.s. I originally posted this question on StackOverflow <http://stackoverflow.com/questions/17536227/boost-multiindex-template-subst…> but thought this might be a better forum. Sorry for the cross-post... #include <boost/multi_index_container.hpp> #include <boost/multi_index/hashed_index.hpp> #include <boost/multi_index/mem_fun.hpp> #include "Product.hpp" #include <iostream> int main(int argc, char* argv[]) { boost::multi_index_container< boost::intrusive_ptr<Product>, boost::multi_index::indexed_by< boost::multi_index::hashed_unique< boost::multi_index::const_mem_fun< Product, id_t, static_cast<id_t (Product::*)() const>(&Product::id) > >, boost::multi_index::ordered_non_unique< boost::multi_index::const_mem_fun< Product, price_t, static_cast<price_t (Product::*)() const>(&Product::price) > > > > cont; auto o = boost::intrusive_ptr<Product>(new Product()); o->id(1).price(price_t(14.75)); cont.insert(o); auto it = cont.get<1>().find(price_t(14.75)); if (it!=cont.get<1>().end()) std::cout << *(it); return 0; } -- View this message in context: http://boost.2283326.n4.nabble.com/Boost-MultiIndex-template-substitution-f… Sent from the Boost - Users mailing list archive at Nabble.com.

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Incorrect result from mcgregor_common_subgraphs. Where can I find more example of this MCS solver?
by dante0125 08 Jul '13

08 Jul '13

Hi, I am a beginner with BGL. Currently I am using mcgregor_common_subgraphs solver to find all the common subgraphs between two graphs. The following link is the only one example showing how to use the library that I can find from the Internet. http://svn.kulitorum.com/RepSnapper/Libraries/Boost1.40/libs/graph/example/… My first question is where can I find more example of this MCS solver? My second question is why some times it can not find maximum common subgraph. By maximum I mean a common subgraph with largest number of vertices which is implemented in the code. Here I provide an example. This code is modified from mcgregor_subgraphs_example, I change the graph to undirected graph and add some vetices and edges. It is obvious that the correct answer should be of size 9. The answer return by the code missing edge 8-5 and 8-3. //======================================================================= // Copyright 2009 Trustees of Indiana University. // Authors: Michael Hansen // // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) //======================================================================= #include <fstream> #include <iostream> #include <string> #include <boost/lexical_cast.hpp> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/filtered_graph.hpp> #include <boost/graph/graph_utility.hpp> #include <boost/graph/iteration_macros.hpp> #include <boost/graph/mcgregor_common_subgraphs.hpp> #include <boost/property_map/shared_array_property_map.hpp> using namespace boost; // Callback that looks for the first common subgraph whose size // matches the user's preference. template <typename Graph> struct example_callback { typedef typename graph_traits<Graph>::vertices_size_type VertexSizeFirst; example_callback(const Graph& graph1) : m_graph1(graph1) { } template <typename CorrespondenceMapFirstToSecond, typename CorrespondenceMapSecondToFirst> bool operator()(CorrespondenceMapFirstToSecond correspondence_map_1_to_2, CorrespondenceMapSecondToFirst correspondence_map_2_to_1, VertexSizeFirst subgraph_size) { // Fill membership map for first graph typedef typename property_map<Graph, vertex_index_t>::type VertexIndexMap; typedef shared_array_property_map<bool, VertexIndexMap> MembershipMap; MembershipMap membership_map1(num_vertices(m_graph1), get(vertex_index, m_graph1)); fill_membership_map<Graph>(m_graph1, correspondence_map_1_to_2, membership_map1); // Generate filtered graphs using membership map typedef typename membership_filtered_graph_traits<Graph, MembershipMap>::graph_type MembershipFilteredGraph; MembershipFilteredGraph subgraph1 = make_membership_filtered_graph(m_graph1, membership_map1); // Print the graph out to the console std::cout << "Found common subgraph (size " << subgraph_size << ")" << std::endl; print_graph(subgraph1); std::cout << std::endl; // Explore the entire space return (true); } private: const Graph& m_graph1; VertexSizeFirst m_max_subgraph_size; }; int main (int argc, char *argv[]) { // Using a vecS graph here so that we don't have to mess around with // a vertex index map; it will be implicit. typedef adjacency_list<listS, vecS, undirectedS, property<vertex_name_t, unsigned int, property<vertex_index_t, unsigned int> >, property<edge_name_t, unsigned int> > Graph; typedef graph_traits<Graph>::vertex_descriptor Vertex; typedef graph_traits<Graph>::edge_descriptor Edge; typedef property_map<Graph, vertex_name_t>::type VertexNameMap; typedef property_map<Graph, edge_name_t>::type EdgeNameMap; // Test maximum and unique variants on known graphs Graph graph_simple1, graph_simple2; example_callback<Graph> user_callback(graph_simple1); VertexNameMap vname_map_simple1 = get(vertex_name, graph_simple1); VertexNameMap vname_map_simple2 = get(vertex_name, graph_simple2); // Graph that looks like a triangle put(vname_map_simple1, add_vertex(graph_simple1), 1); put(vname_map_simple1, add_vertex(graph_simple1), 2); put(vname_map_simple1, add_vertex(graph_simple1), 3); put(vname_map_simple1, add_vertex(graph_simple1), 4); put(vname_map_simple1, add_vertex(graph_simple1), 5); put(vname_map_simple1, add_vertex(graph_simple1), 6); put(vname_map_simple1, add_vertex(graph_simple1), 7); put(vname_map_simple1, add_vertex(graph_simple1), 8); put(vname_map_simple1, add_vertex(graph_simple1), 9); add_edge(0, 1, graph_simple1); add_edge(0, 2, graph_simple1); add_edge(0, 4, graph_simple1); add_edge(1, 2, graph_simple1); add_edge(1, 3, graph_simple1); add_edge(1, 6, graph_simple1); add_edge(2, 3, graph_simple1); add_edge(2, 4, graph_simple1); add_edge(3, 5, graph_simple1); add_edge(4, 5, graph_simple1); add_edge(5, 6, graph_simple1); add_edge(7, 8, graph_simple1); add_edge(6, 7, graph_simple1); add_edge(8, 5, graph_simple1); add_edge(8, 3, graph_simple1); std::cout << "First graph:" << std::endl; print_graph(graph_simple1); std::cout << std::endl; // Triangle with an extra vertex put(vname_map_simple2, add_vertex(graph_simple2), 1); put(vname_map_simple2, add_vertex(graph_simple2), 2); put(vname_map_simple2, add_vertex(graph_simple2), 3); put(vname_map_simple2, add_vertex(graph_simple2), 4); put(vname_map_simple2, add_vertex(graph_simple2), 5); put(vname_map_simple2, add_vertex(graph_simple2), 6); put(vname_map_simple2, add_vertex(graph_simple2), 7); put(vname_map_simple2, add_vertex(graph_simple2), 8); put(vname_map_simple2, add_vertex(graph_simple2), 9); add_edge(0, 1, graph_simple2); add_edge(0, 2, graph_simple2); add_edge(0, 4, graph_simple2); add_edge(1, 2, graph_simple2); add_edge(1, 5, graph_simple2); add_edge(2, 4, graph_simple2); add_edge(3, 5, graph_simple2); add_edge(3, 6, graph_simple2); add_edge(7, 8, graph_simple2); add_edge(1, 6, graph_simple2); add_edge(6, 7, graph_simple2); add_edge(8, 5, graph_simple2); add_edge(8, 3, graph_simple2); std::cout << "Second graph:" << std::endl; print_graph(graph_simple2); std::cout << std::endl; // Maximum subgraphs // Maximum, unique subgraphs std::cout << "mcgregor_common_subgraphs_unique:" << std::endl; mcgregor_common_subgraphs_unique (graph_simple1, graph_simple2, true, user_callback, vertices_equivalent(make_property_map_equivalent(vname_map_simple1, vname_map_simple2))); std::cin.get(); return 0; } -- View this message in context: http://boost.2283326.n4.nabble.com/Incorrect-result-from-mcgregor-common-su… Sent from the Boost - Users mailing list archive at Nabble.com.

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Re: [Boost-users] boost::io_service run() never returns
by Marat Abrarov 07 Jul '13

07 Jul '13

Not sure if this can help, but there was a problem with serial port (asynchronous reading, maybe epoll-related) at Ubuntu. That problem wasn't related to Asio, it was an OS bug. Search asio-users mailing list for details. Regards, Marat Abrarov.

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Different behavior of boost::serialization of strings on text archive
by Andrea Ranieri 07 Jul '13

07 Jul '13

Hi all, I'm having some issue serializing a `std::string` with `boost::serialization` on a `text_oarchive`. AFAICT, I have two identical pieces of code that behaves differently in two different programs. This is the program that I believe is behaving correctly: #include <iostream> #include <string> #include <sstream> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> template <typename T> void serialize_deserialize(const T & src, T & dst) { std::string serialized_data_str; std::cout << "original data: " << src << std::endl; std::ostringstream archive_ostream; boost::archive::text_oarchive oarchive(archive_ostream); oarchive << src; serialized_data_str = archive_ostream.str(); std::cout << "serialized data: " << serialized_data_str << std::endl; std::istringstream archive_istream(serialized_data_str); boost::archive::text_iarchive iarchive(archive_istream); iarchive >> dst; } int main() { std::string archived_data_str = "abcd"; std::string restored_data_str; serialize_deserialize<std::string>(archived_data_str, restored_data_str); std::cout << "restored data: " << restored_data_str << std::endl; return 0; } And this is its output: original data: abcd serialized data: 22 serialization::archive 10 4 abcd restored data: abcd (You can compile it with: `g++ boost-serialization-string.cpp -o boost-serialization-string -lboost_serialization`) This one, on the other hand, is an excerpt of the program I'm writing (derived from [boost_asio/example/serialization/connection.hpp][1]) that serializes `std::string` data converting each character in its hex representation: /// Asynchronously write a data structure to the socket. template <typename T, typename Handler> void async_write(const T& t, Handler handler) { // Serialize the data first so we know how large it is. std::cout << "original data: " << t << std::endl; std::ostringstream archive_stream; boost::archive::text_oarchive archive(archive_stream); archive << t; outbound_data_ = archive_stream.str(); std::cout << "serialized data: " << outbound_data_ << std::endl; [...] And this is an excerpt of its output: original data: abcd serialized data: 22 serialization::archive 10 5 97 98 99 100 0 The version (`10`) is the same, right? So that should be the proof that I'm using the same serialization library in both programs. However, I really can't figure out what's going on here. I've been trying to solve this puzzle for almost an entire work day now, and I'm out of ideas. For anyone that may want to reproduce this result, it should be sufficient to download the [Boost serialization example][2], add the following line connection_.async_write("abcd", boost::bind(&client::handle_write, this, boost::asio::placeholders::error)); at line 50 of `client.cpp`, add the following member function in client.cpp /// Handle completion of a write operation. void handle_write(const boost::system::error_code& e) { // Nothing to do. The socket will be closed automatically when the last // reference to the connection object goes away. } add this `cout`: std::cout << "serialized data: " << outbound_data_ << std::endl; at `connection.hpp:59` and compile with: g++ -O0 -g3 client.cpp -o client -lboost_serialization -lboost_system g++ -O0 -g3 server.cpp -o server -lboost_serialization -lboost_system I'm using `g++ 4.8.1` under `Ubuntu 13.04 64bit` with `Boost 1.53` Any help would be greatly appreciated. Best regards Avio P.s. I'm posting this because the deserialization of the `std::string`s isn't working at all! :) [1]: http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/example/serializat… [2]: http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/examples.html#boos…

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boost::io_service run() never returns
by shunguang 06 Jul '13

06 Jul '13

I have the following simplified code to read data from a RS232 port. For some (from beginning) runs, io.run() returns immediately and m_handler() is called which is expected. but sometimes (a fresh run from beginning), io.run() goes into a inside forever loop(stacked inside forever) even for the first time called inside the while loop. And this happens randomly. What's is/are the potential problem(s) at here? Thanks. -shunguang #define BUF_SIZE 512 char data[BUF_SIZE]; void my_handler(const boost::system::error_code& err, std::size_t bytes_transferred) { printf("%d\n", bytes_transferred); if (!err){ process_data(); } } void test_serial_port( int argc, char* argv[] ) { // hard coded parameters const char *PORT = "COM1"; serial_port_base::baud_rate BAUD(9600); serial_port_base::character_size CSIZE( 8 ); serial_port_base::flow_control FLOW( serial_port_base::flow_control::software ); serial_port_base::parity PARITY( serial_port_base::parity::none ); serial_port_base::stop_bits STOP( serial_port_base::stop_bits::one ); io_service io; serial_port port( io, PORT ); // go through and set all the options as we need them // all of them are listed, but the default values work for most cases port.set_option( BAUD ); port.set_option( CSIZE ); port.set_option( FLOW ); port.set_option( PARITY ); port.set_option( STOP ); while( !kbhit() ) { io.reset(); port.async_read_some( boost::asio::buffer(data, BUF_SIZE), boost::bind(&my_handler, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred ) ); io.run(); Sleep(300); } } -- View this message in context: http://boost.2283326.n4.nabble.com/boost-io-service-run-never-returns-tp464… Sent from the Boost - Users mailing list archive at Nabble.com.

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[filesystem] current_path
by Ovanes Markarian 06 Jul '13

06 Jul '13

Hello *, I need to create a relative symlink. To do so I currently use current_path function: auto current_path = fs::current_path(); BOOST_SCOPE_EXIT(&current_path) { fs::current_path(current_path); }BOOST_SCOPE_EXIT_END fs::current_path(some_base_path_here); fs::create_symlink ( fs::path("..")/some_subdirectory/image_name.filename() , original_name.filename() ) ; Is there any better way to create a relative symlink? What happens if I call current_path(whatever) in a multi-threaded environment? Is it thread-safe or should I synchronize the access to it? Many thanks, Ovanes

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[multi_index] emplace support
by Brian Wood 06 Jul '13

06 Jul '13

I'm wondering about emplace support in multi_index. Any news on that is of interest. -- Brian Ebenezer Enterprises - In G-d we trust. http://webEbenezer.net

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Re: [Boost-users] Do correct instructions for MinGW install exist?
by lizy10b 05 Jul '13

05 Jul '13

Hi Kirk Joppy, I have got most of the 1.53 libraries built with MinGW, though some of them do not work correctly till now. I would like to share with you the following steps I did. 1. Add the bin folder of MinGW to your windows environment variable "PATH". 2. Open a the new commandline window, and type "bootstrap.bat mingw" in the boost souce root dir to build the b2.exe and bjam.exe. 3. Type "b2 toolset=gcc --prefix=G:\boost_1_53_0\my-build' to build the libraries. Hope it works. cheers. Zhiyu Li 2013-07-02 lizy10b 发件人： Kirk Joppy 发送时间： 2013-07-02 12:12:50 收件人： boost 抄送：主题： [Boost-users] Do correct instructions for MinGW install exist? Dear Boost users, I have recently been trying to install boost 1.53 for use with MinGW. I followed the instructions here http://www.boost.org/doc/libs/1_53_0/more/getting_started/windows.html#prep… to the letter with resulting failure. I then noticed that when running b2 install --prefix=G:\boost_1_53_0\my-build from G:\boost_1_53_0\tools\build\v2 as per the instructions, the first few lines of output read warning: No toolsets are configured warning: Configuring default toolset "msvc" warning: If the defrault is wrong, your build may not work correctly warning: Use the "toolset=xxxxx" option to override our guess warning: For more configuration options, please consult <webpage> I have consulted the recommended web page and I think I have gotten a working install. However, given that the instructions as written are incorrect I would like to ask 1. Is there a correct, definitive source of instructions for installing boost (with MinGW)? 2. Should the documentation be corrected? I think this error is important given that the section I was working from is specifically indicated to pertain to non-MSVC builds. 3. I have found several conflicting sources of information regarding how to build boost for use with static linking. StackOverflow, for example, has several posts about this, none of which agree with each other. Is there are definitive, correct source of this information? If not I suppose I will post to this mailing list asking about it. Thank you for your consideration. Regards, kjoppy _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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[MSM] Problem with passing event as a reference to base event class
by samriti katoch 05 Jul '13

05 Jul '13

Hi, I have noticed a strange problem with event processing with msm. My events derive publicly from a base events struct like this: struct BaseEvent { virtual ~BaseEvent() {} }; struct ConcreteEvent : public BaseEvent {}; I my FSM i have a transition defined for ConcreteEvent, When I do this : void foo(const BuddyEvent& event) { fsm->process_event(event); // event is of type ConcreteEvent } The fsm fires a no_transition , and I see a message saying no transition for ConcreteEvent in state X (state X has a valid transition for ConcreteEvent) However this succeeds: void foo(const BuddyEvent& event) { fsm->process_event(ConcreteEvent(0); } I am using boost-1.49 and the boost msm library that comes bundled with this. So my question is, why is msm not able to generate a valid transition for a concrete event passed as a reference to its base tyoe. Thanks!

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