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

Statechart serialization
by mbrodeur65 04 Mar '15

04 Mar '15

Hi, I'm looking for a solution to serialize boost::statechart objects. I'm aware that this feature is on the statechart library todo list but was wondering if there are any workaround to achieve this with the latest boost release (1.34) ? thanks for your help ! mbrodeur65 -- View this message in context: http://www.nabble.com/Statechart-serialization-tf4131326.html#a11749139 Sent from the Boost - Users mailing list archive at Nabble.com.

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[Statechart] How to decide between post_event and process_event atrun time ?
by Philippe DAVID 22 Jul '14

22 Jul '14

Hi, I have a method in which I want to post/process an event. The thing is, this method can be called from outside the state machine (so I need to call process_event), or indirectly by a reaction of the state machine (in this case I must call post_event since process_event is not reentrant). I don't want to write 2 distinct methods to do this (one that calls post, and the other process), I would much rather prefer adding a 'if' in my method that tells me if I have to call process_event or post_event (if I'm being called indirectly by the state machine or not). Is there a way to do this with statechart ? regards, Philippe

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[asio] resolver::cancel() problem
by Matthew Edwards 14 Mar '14

14 Mar '14

In my application (and a separate test program) it seems as though the cancel() function on the resolver does not work as intended. For async resolves, the cancel functionality should abort them immediately and pass an 'operation aborted' error code to the callback handler. In my tests, I will resolve an invalid domain (this causes the resolve to take a few seconds, to demonstrate the problem), sleep for 100ms, then call cancel on the resolver object. No cancelling actually occurs, and the callback is simply triggered after a few seconds with a "No host found" error code, not the expected operation aborted. Has anyone experienced this before, or know how I might be using the resolver incorrectly?

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can't get first example in boost tutorial to work
by 7stud 11 Mar '13

11 Mar '13

I'm trying to install boost on mac osx 10.4.7. I followed the tutorial "Getting Started on Unix Variants" found here: http://www.boost.org/doc/libs/1_35_0/ more/getting_started/unix-variants.html Following the instructions in the tutorial, I installed boost in /usr/local as instructed, so my directory structure is: /usr/local/boost_1_34_1/boost But when I run the first example in the tutorial: #include <boost/lambda/lambda.hpp> #include <iostream> #include <iterator> #include <algorithm> int main() { using namespace boost::lambda; typedef std::istream_iterator<int> in; std::for_each(in(std::cin), in(), std::cout << (_1 * 3) << " " ); } I get the error(among others): error: boost/lambda/lambda.hpp: No such file or directory If I change the include path to: #include </user/local/boost_1_34_1/boost/lambda/lambda.hpp> I get the error(among others): error: boost/lambda/core.hpp: No such file or directory But core.hpp is in the lambda directory: /usr/local/boost_1_34_1/boost/lambda$ ls algorithm.hpp control_structures.hpp lambda.hpp bind.hpp core.hpp loops.hpp casts.hpp detail numeric.hpp closures.hpp exceptions.hpp switch.hpp construct.hpp if.hpp I'm using the Xcode 2.4 IDE to run my C++ programs. I also tried to execute the program from the command line with the original include path: #include <boost/lambda/lambda.hpp> but I get the same error: ~/2testing/dir1$ g++ prog1.cpp prog1.cpp:1:35: error: boost/lambda/lambda.hpp: No such file or directory prog1.cpp: In function 'int main()': prog1.cpp:8: error: 'boost' has not been declared prog1.cpp:8: error: expected namespace-name before ';' token prog1.cpp:8: error: '<type error>' is not a namespace prog1.cpp:11: error: '_1' was not declared in this scope I get the same errors again with the full include path: #include </user/local/boost_1_34_1/boost/lambda/lambda.hpp> $ g++ prog1.cpp In file included from prog1.cpp:1: /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:14:33: error: boost/lambda/core.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:21:52: error: boost/lambda/detail/operator_actions.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:22:61: error: boost/lambda/detail/operator_lambda_func_base.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:23:63: error: boost/lambda/detail/operator_return_type_traits.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:26:45: error: boost/lambda/detail/operators.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:30:46: error: boost/lambda/detail/member_ptr.hpp: No such file or directory prog1.cpp: In function 'int main()': prog1.cpp:8: error: 'boost' has not been declared prog1.cpp:8: error: expected namespace-name before ';' token prog1.cpp:8: error: '<type error>' is not a namespace prog1.cpp:11: error: '_1' was not declared in this scope What path should I be using? Or, should I set an environment variable somewhere?

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[multi_array] operator= requires resize - why?
by Markus Werle 04 Jun '12

04 Jun '12

Hi! IMHO the behaviour of operator= for multi_array is a little bit broken. A lot of preconditions required: template <typename ConstMultiArray> multi_array_ref& operator=(const ConstMultiArray& other) { [...] // make sure the dimensions agree assert(other.num_dimensions() == this->num_dimensions()); assert(std::equal(other.shape(),other.shape()+this->num_dimensions(), this->shape())); Besides the fact that I get mad about asserts instead of exceptions (please change this to a way users may choose) why do we have such an odd behaviour here? >From page 1, line 3 of the docs I cite: "The interface design is in line with the precedent set by the C++ Standard Library containers" - this is not true for operator=, since std::<container>::operator= works fine for me all the time _without_ any resize. Could we please change the behaviour of multi_array::operator= to take care of resize where in need to? IMHO operator= should result in a true copy ignoring previous state. Markus

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MSVC Visualizers Update
by Filip Konvička 28 Jul '11

28 Jul '11

Hi all, I've just updated the Boost visualizers wiki page at https://svn.boost.org/trac/boost/wiki/DebuggerVisualizers I updated the visualizer for Boost.MultiIndex, which did not work since Boost 1.35. I also added new visualizers for Boost.DateTime (ptime and time_duration) and a simple boost::shared_ptr visualizer. The visualizers are available for checkout via SVN at https://svn.boost.org/svn/boost/sandbox/boost_docs/subprojects/DebuggerVisu… Cheers, Filip

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Asio unhandled exception
by Łukasz Majewski 20 May '11

20 May '11

Hello, I created a server single thread async (linux) and clinet (win). Every time client is close while server is writing to the socket connected to this client exception appears: terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::system::system_error>>' what(): Transport endpoint is not connected Aborted and server is terminated. I dont know why this exception is unhandled. int main( int argc, char** argv ) { try { boost::asio::io_service io_service; quotation_server server( io_service ); while ( true ) { try { io_service.run(); } catch( ... ){} } } catch ( std::exception& e ) { LOG << e.what() << std::endl; } catch( ... ) { LOG << "Unexpected exception" << std::endl; } return 0; }

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Simple serial port demonstration with boost asio asynchronous I/O
by Jeff Gray 26 Jan '11

26 Jan '11

A couple of weeks ago I posted a simple asynchronous demonstration of a telnet client using boost asio TCP network code. I have changed this code to turn it into a simple serial terminal application using the serial port support in the new version of boost asio. It required no changes at all the the read or write code. I just altered the initialization to use a serial port instead of a socket. Note that this is not intended to show how a fully functional application would work. There are plenty of areas that are not handled in this code. But it shows the idea and it's easy to build on this once you've got it working. Hope this helps someone else get started... Jeff

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Help with shared_ptr and template
by Mario Chacon 10 Sep '10

10 Sep '10

Hello: I have this problem and I do not how to fix it, I know I cannot write template typedefs, its a limitiation of the C++ syntax, right? or I'm wrong? I saw that the best way is to wrap your typedefs in a struct, which can be templated, but I'm still stack with problems. The best way to explain it's with an example: #include <cstdlib> #include <iostream> #include <boost/shared_ptr.hpp> template< typename tvalue > class CValue { public: CValue( tvalue value ) : value_(value) {}; private: tvalue value_; }; template< typename tvalue > struct Type{ typedef boost::shared_ptr< CValue< tvalue > > pValue; }; int main(int argc, char *argv[]) { Type<bool>::pValue a; return EXIT_SUCCESS; } How can I create a shared_ptr for the template class "CVALUE"?? Please I do not know what else I can prove... :( Thank you.. Mario.. Salu2...

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[1.35.0][OSX][iostreams] Exception thrown with utf8 filename
by Christophe Radondy 17 Feb '10

17 Feb '10

Hi, I try to do a cross-platform source code and I have this code. I compiled boost 1.35 in universal binaries on Mac OS 10.5.4 with intel platform (IMAC core 2 duo 3Ghz) The same code works on linux (Ubuntu 8.0.4 and debian) and windows platforms but on Mac OS 10.5 I have an exception in boost's libraries. We compile on universal binaries with -fexceptions options of g++ 4.0.1 (Apple). This is my code: <code> boost::filesystem::wpath unicode(L"abcdef\u0110"); boost::filesystem::ofstream file(unicode.string()); // throws Invalid Argument on Mac file << "abcdef" << endl; file.close(); <endcode/> If I do this, it works: <code> boost::filesystem::path utf8("abcdef\xC4\x90"); // \xC4\x90 == \u0110 boost::filesystem::ofstream file(utf8.string()); // works ok file << "abcdef" << endl; file.close(); <endcode/> When the ofstream is created, this function is executed and crashes when I use Unicode parameters : <code> unicode.external_file_string(); // throws uncaught exception of type boost::filesystem::basic_filesystem_error<boost::filesystem::basic_path<std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >, boost::filesystem::wpath_traits> > - boost::filesystem::wpath::to_external conversion error: Invalid argument <endcode/> Do you have any idea? Is this a known bug? Did I miss a setting? Thanks for your help. Regards, Christophe.

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[Boost] Is this library availble for 64 bit?
by Jaiswal, Usha [OS-IE] 11 Feb '10

11 Feb '10

Is there any version of Boost for 64 bit.

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[iterators][range][rangeex] range concatenation
by Dmitry Vinogradov 12 Jan '10

12 Jan '10

Is it possible with Boost (or RangeEx) to concatenate ranges? Sample usage: template <class Range> void process_range(Range const &); std::vector<foo> v = ...; std::list<foo> l = ...; process_range(concat(v, l));

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[Math/Statistical Distributions+Random] Random number generation
by Marco Guazzone 07 Jan '10

07 Jan '10

Hi all! I'm a "boost newbie" so sorry for too trivial questions. Just trying to use boost for some statistical experiments, involving statistical distribution fitting, quantile generation (for goodness-of-fit tests), random variate generation, and so on. . The "Math/Statistical Distribution" library is great and almost complete. But I'm just curious why the random number generation (provided by the "Random" lib) and this library have not been integrated. For instance, the boost::random::exponential_distribution and the boost::math::exponential_distribution are two different worlds. I think a function like this below would be very helpful: --- [snip] --- template <typename Generator, typename RealType, typename Policy> inline RealType rand(Generator& rng, const exponential_distribution<RealType, Policy>& dist) { return -1.0 / dist.lambda() * std::log(1.0-rng()); } --- [snip] --- or something similar (e.g., rand implemented as a class method) In this case only two objects are needed: * boost::random::mersenne_twister * boost::math::exponential_distribution Instead, actually I have to keep different objects. For instance, for the exponential distribution: * boost::random::exponential_distribution * boost::random::mersenne_twister * boost::random::variate_generator * boost::math::exponential_distribution Unluckely I can't use boost::math::exponential_distribution in place of boost::random::exponential_distribution since boost::random::variate_generator expects a specific interface for the distribution. Well, what is the rationale behind the choice of this separation? Do you think would be useful to provide this kind of integration? Thank you very much in advance!! Cheers -- Marco

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Newbie question
by Michael Qi 07 Dec '09

07 Dec '09

Hi, I am trying to start to learn boost. Now, I am learning the getting started guide. And try to build a boost regex program in the guide. But Visual C++ 7.1 tell me error: LINK : fatal error LNK1104: Could not open file "D:\Program.obj" Could you help me? Thank you

2 1

[Boost.Test] [1.38] Automated test suie registration with muti-file-test-modules
by Greg Christopher 17 Oct '09

17 Oct '09

Hi, We are starting to expand the number of test modules and are having some growing pains. Originally we were using the "single header" variant included/unit_test.hpp file. Now we have switched to linking to the dynamic version of the boost test library and are including auto_unit_test.hpp. We have been counting on the Test Tools to automatically register suites and test cases. This still worked when we just included unit_test.hpp (instead of included/unit_test.hpp). However with multiple test modules, init_unit_test_suite is being defined in each module. I am looking for clear documentation on what to do. This seems like the closest thing: http://www.boost.org/doc/libs/1_31_0/libs/test/doc/components/unit_test_fra… However following those directions exactly when trying to use multiple test modules (in a single executable) and only one BOOST_AUTO_TEST_MAIN still results in init_unit_test_suite being multiply defined. I would like multiple test suites, although the documentation for this declares that there is a single global test suite. I apologize if this is well documented somewhere, but after an hour of googling I have to ask. Greg

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New library for RPC-calls using only boost and C++0x
by Siegfried Kettlitz 13 Oct '09

13 Oct '09

Hello boost users and developers, i'm currently writing a library for making remote procedure calls to C++ objects. The library is based on the variadic templates extension coming with C++0x (already present in GCC 4.3) in conjunction with the boost library (threads, serialization, asio). The aim is to have a library, that is easy to integrate and doesn't require additional tools. Writing it, so far, has thaught me a lot about C++, templates, variadic templates, threading, networking etc.. I post this message, because i think that this library is quite handy in situations, where a developer already uses boost libraries and wants to add some networking functionality to his/her project and the usage of variadic templates instead of additional tools is quite new. One example would be remote monitoring an application by adding a "std::string get_status()"-function to some object. Implemented as example is a chat-system with a server and clients interacting by remote calls. This example is tested with a x64-linux and win32 using the portable boost-text-serialization. Multiple clients can connect to the server via the TCP/IP-acceptor (and disconnect without crashing the system). Implemented is a console-client for text input and display and a morse client, that interacts via a digital output device (relais card), which is connected via a serial port. The serial port and the digital output driver are both also connected via the rpc-system and can be physically located on separate computers. At this point, i have the basic bits together and a working rpc-library, that needs to be cleaned, refined and extended to match the practical needs. This means, that some programs and libraries have to be written, which use the rpc-library and show its bugs and limitations. The downside of it is, that the interface of the rpc-library may change one more time until it can be considered stable. Therefore it would not be good to test it widely in libraries posing similar requirements, but to test it with a variety of possible applications and provide the implementations as examples and (regression-/unit-)tests. - One library for Measurement/Automation is already in development. - The chat-server/client exists. - A transaction based game server is under consideration. - Some distributed parallel computing application with dynamic joining/leaving of clients. Can you give me some more ideas of different applications, which are easy to implement but yet useful? What would you like to have implemented and accessible by an rpc-library? One speed measurement using local (shared memory) channels resulted in 20000 calls/s and 60000 messages/s on a 1.8GHz Opteron. Do you know how this compares to other implementations on similar hardware? The TCP/IP-channel implementation using ASIO resulted in only about 100 synchronous calls/second regardless of the payload and almost no CPU load, which suggests that ASIO somewhere "sleeps" on linux systems for a few milliseconds. This would be fixed in some future implementation. Using asynchronous calls (1000 open calls) again leads to about 10000 calls/s. I'll have a closer look on what can be merged with "channels" from the boost vault[1], but from the first look it seems that "channels" targets a much more general approach. After the first tries, i realized, that my implemention has to be very specific (e.g. templates only where necessary). So, the design approaches might be too different. After the refinement, cleanup, some testing and documenting, i'd like to publish the rpc-library (and libraries based on it) under GPL- or boost-license. Then you'll hear from me again. In future i'll probably work 2-8 hours per week on the library and use it in some projects, but there's plenty of work left to do in various regions. This will leave space for other developers who might want to use and modify it to fit their needs. Some of the harder parts that would need implementation are redundant parallel connections and advanced routing, authentication of nodes, signing of messages, encryption of payload, access restriction to objects. Please let me know if * you are interested in this library in some way * have comments * know very similar libraries or * are interested in serialization using variadic function templates. Regards, Siegfried Kettlitz --- A short introduction on the library: * "nodes" are the central parts. They contain a factory for objects, store objects and forward "messages" to objects or other nodes in the network and contain a "scheduler" for executing function calls. The nodes are connected by "channels", which forward messages between the two connected nodes. Currently there is a TCP/IPv4 implementation using ASIO and direct forwarding. * Nodes connected by channels form a network, create and monitor virtual connections between each other. The network map is used to route messages between connected nodes. * An object has to supply a template for a class name (only if it can be constructed by the factory) and a template for registering the callable functions (also for abstract base classes which can't be constructed). * A function call is executed asynchronously (wrapper for synchronous call exists). The call to node.call(...) returns a "link_caller"-object. The function to be executed itself can optionally have "link_callee" as the first argument (which is invisible for the caller). The "link_caller"/"link_callee" is used for synchronization (wait for call to begin/finish execution), message forwarding (push/pop strings at caller/callee) and transfer/extraction of the return value. * Objects of class hierarchies with abstract base classes are possible and handled transparently. * Objects can be constructed by the factory of a node or an existing (externally constructed) object can be registered by the node. * Objects don't necessarily need to know (be modified, inherit something etc.) that they are part of the RPC-system and some of their functions are called remotely. * Objects can be aware that they are constructed by the factory and can, on construction be informed about their identity and get a reference to the node to make remote calls themselves. * An object is identified by a "reference" consisting of the "node_id" and the "object_id". * Parameters are passed (serialized, deserialized) by value. All function parameters must have the possibility to be serialized. Modifying referenced parameters won't affect the parameter at the caller. Pointers obviously won't work between nodes not sharing the same memory-address-space. * Called functions can use "link_callee" to make remote calls themselves, regardless of the object. * Priorities are assigned to calls and affect message forwarding and scheduling. * Calls to objects can be transformed into a boost::function using node.bind(...). * If a called function throws, the exception is forwarded as rpc::exception or a more specialized exception class. The exception is thrown at the caller, when waiting for interaction with the callee (e.g. wait for return value). * Template functions as targets are possible when specifying the template parameters of the function pointer when registering the function. * There is no need to use macros at all, although macros could be used to simplify some things. ---------- // Example for creating and calling an object. // Create a service. boost::asio::io_service node_io_service; // Create a node. rpc::node node_s(node_io_service, config); // Register the builder in order to build the server object later. node_s.register_builder<devicelib::chat_server_impl>(); // Register the interface of the client to be able to make calls to it. node_s.register_interface<devicelib::chat_client>(); // Create the server object. rpc::reference cs( node_s.get_id(), node_s.allocate_object_template<devicelib::chat_server_impl>() ); // Store the server in name server. // rpc::reference( node_s.get_id(), rpc::oid_simple_object_name_server ) -> A reference to the object_name_server. // rpc::sched_default() -> Default scheduling parameters. // &rpc::simple_object_name_server::store, cs -> function to call. // cs, "chat_server_object" -> function parameters. node_s.wrap_call( rpc::reference( node_s.get_id(), rpc::oid_simple_object_name_server ), rpc::sched_default(), &rpc::simple_object_name_server::store, cs, "chat_server_object" ); ---------- // Example for abstract base class. namespace devicelib { class chat_server : public chat_types { public: virtual void receive( std::string xml_message ) = 0; virtual user_id_t connect_user( rpc::reference a_client, std::string xml_user_info ) = 0; virtual std::string query_user( user_id_t id ) = 0; virtual void disconnect_user( user_id_t user ) = 0; virtual void join_room( user_id_t user, room_id_t room ) = 0; virtual std::list<user_id_t> list_users( ) = 0; virtual std::list<room_id_t> list_rooms( ) = 0; }; } --------------- // Example for registering the interface of the server object. // The template is declared in namespace rpc, therefore we need to define it there. namespace rpc { // For the base object. template<> void register_proxy_functions<devicelib::chat_server>( function_call_proxy<devicelib::chat_server>& ar_proxy ) { // Register the functions of the abstract base object using unique strings. ar_proxy.register_interface( &devicelib::chat_server::connect_user, "&chat_server::connect_user" ); ar_proxy.register_interface( &devicelib::chat_server::query_user, "&chat_server::query_user" ); ar_proxy.register_interface( &devicelib::chat_server::disconnect_user, "&chat_server::disconnect_user" ); ar_proxy.register_interface( &devicelib::chat_server::join_room, "&chat_server::join_room" ); ar_proxy.register_interface( &devicelib::chat_server::list_users, "&chat_server::list_users" ); ar_proxy.register_interface( &devicelib::chat_server::list_rooms, "&chat_server::list_rooms" ); } // For each implementation. template<> void register_proxy_functions<devicelib::chat_server_impl>( function_call_proxy<devicelib::chat_server_impl>& ar_proxy ) { // Register the functions of the base object. register_proxy_functions<devicelib::chat_server>( (function_call_proxy<devicelib::chat_server>&) ar_proxy ); // Make the functions of this object available. ar_proxy.register_interface( &devicelib::chat_server_impl::connect_user, &devicelib::chat_server::connect_user ); ar_proxy.register_interface( &devicelib::chat_server_impl::disconnect_user, &devicelib::chat_server::disconnect_user ); ar_proxy.register_interface( &devicelib::chat_server_impl::join_room, &devicelib::chat_server::join_room ); ar_proxy.register_interface( &devicelib::chat_server_impl::list_users, &devicelib::chat_server::list_users ); ar_proxy.register_interface( &devicelib::chat_server_impl::list_rooms, &devicelib::chat_server::list_rooms ); } // The implementation can be built, the base object not. template<> std::string class_builder_name<devicelib::chat_server_impl>() { // Give it an unique name here. return "chat_server_impl"; } } ----------------- 1: http://www.boostpro.com/vault/index.php?&direction=0&order=&directory=Distr…

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timeconv.inl
by Dan Smithers 11 Sep '09

11 Sep '09

I am porting some inherited code to MSVS 2008 This is also bringing along an upgrade from boost 1.32 to a newer version (probably 1.37). I have found a thread wrapper class in the code that uses time_to directly. This is defined in lib/thread/src/timeconv.inl and doesn't look like its meant to be used directly. The original code base has timeconv.inl in the boost include directory. Was timeconv.inl moved at some point in the past? Is this as bad as I think it is? thanks dan

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Status of Boost.Extension from sandbox?
by Rex Kerr 10 Sep '09

10 Sep '09

I'm evaluating various plugin solutions for a project and am considering boost.extension as one of the alternatives. Looking at http://boost-extension.blogspot.com/ and the mailing list archives it appears that the project hasn't been active for a while. I have tried, unsuccessfully, to find a page detailing the current status of sandbox projects to determine whether or not it has been accepted for inclusion in future boost versions, has significant flaws preventing its inclusion, etc. I'm hesitant to choose a project that may be orphaned. Any guidance in finding such status updates, or outright answers to my questions, would be helpful. Thank you, -Rex

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Re: [Boost-users] [Graph] Problems with adjacency_matrix
by Juan Antonio Farré Basurte 29 Aug '09

29 Aug '09

> > > Hello, > I have a problem with adjacency_matrix template. > It claims to implement VertexAndEdgeListGraphConcept, BidirectionalGraphConcept and MutablePropertyGraphConcept. > But when I try to compile, it complains about using the next functions with an adjacency_matrix: > > num_vertices(graph) > vertices(graph) > num_edges(graph) > edges(graph) > source(edge_descriptor, graph) > target(edge_descriptor, > graph) > > and also with > > get(&V::property, graph), where V is a vetex bundled-properties type get(&E::property, > graph), where E is an edge bundled-properties type > > (these get functions should return a property map for the corresponding bundled property > and they work correctly for adjacency_list, just like the rest). > > Is this a bug or an error in the documentation? > > Thanks a lot, > > Juan > Mmmm... I just tried to include adjacency_matrix.hpp and now I don't get errors about those functions anymore. It's strange to have to inclue this header in a template library that doesn't explicitly deal with any concrete implementations of graph concepts. In fact, I don't need to include adjacency_list.hpp for it to work with adjacency_list. I just need to include graph_concepts.hpp and graph_traits.hpp. Anyway, I'm still getting lots of errors in a code that perfectly compiles and works with adjacency lists. If anybody is interested, I can send the listing of compiler errors. Thanks again, Juan

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Re: [Boost-users] [ANN] Boost 1.39.0
by Tom Kent 28 Aug '09

28 Aug '09

I've built windows libraries (vc7.1, vc8, vc9) off of this, if you want them, you can get them from my website: http://boost.teeks99.com Tom > Subject: [Boost-users] [ANN] Boost 1.39.0 > From: Beman Dawes (bdawes_at_[hidden]) > Date: 2009-05-02 16:57:10 > > Boost 1.39.0 is available for download from SourceForge. > > See > http://sourceforge.net/project/showfiles.php?group_id=7586&package_id=8041&… > > New Libraries: Signals2. > > Updated Libraries: Asio, Flyweight, Foreach, Hash, Interprocess, > Intrusive, Program.Options, Proto, PtrContainer, Range, Unordered, > Xpressive. > > Updated Tools: Boostbook, Quickbook. > > Plus the usual bug fixes to numerous libraries. > > Please report any problems to the Boost users or developers mailing > list. > > Thanks, > > --Beman Dawes, Daniel James, and all the other Boosters who help get > releases out

1 1

Random library, discrete distribution
by Kevin Martin 18 Aug '09

18 Aug '09

I made a post sometime last year about requiring a distribution that could generate enums with specified probabilities. I find I am regularly requiring a discrete distribution like this - where I specify the probabilities. Am I the only one who requires it, or would it be useful to a wider audience? I'm just wondering whether to submit a feature request for it or not? Thanks, Kevin Martin This is what I'm using at the moment: template<class IntType = int> class discrete_distribution { public: typedef boost::uniform_int<>::input_type input_type; typedef IntType result_type; template<size_t N> discrete_distribution(const boost::array<int, N> &outputs, const boost::array<int, N> &weights) : outputs_(outputs.begin(), outputs.end()), weights_(weights.begin(), weights.end()) { for(int i=1;i!=weights_.size();++i) weights_[i] += weights_[i-1]; } inline void reset() {} template<class Engine> result_type operator()(Engine& eng) { boost::uniform_int<> ui(0, weights_.back()-1); boost::variate_generator<Engine&, boost::uniform_int<> > vg(eng, ui); int idx = std::lower_bound(weights_.begin(), weights_.end(), vg()) - weights_.begin(); return outputs_[idx]; } private: std::vector<int> outputs_; std::vector<int> weights_; };

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Re: [Boost-users] [Accumulators] Questions about the library
by dhruva 10 Aug '09

10 Aug '09

Hello, > Date: Thu, 25 Jun 2009 03:41:49 -0700 (PDT) > From: adish > Subject: Re: [Boost-users] [Accumulators] Questions about the library > To: boost-users(a)lists.boost.org > > > > > > ? ?2. If my platform does not support HW floating point ops, and all my > > > ? ?sample values are, e.g. ints, is there a way to specify that the > > > *computation > > > ? ?*and *return value itself* (i.e. result_type, e.g. the mean) will be done > > > ? ?in ints (naturally, at the cost of precision)? > > > > I have used UDT as I needed some extra information from the results (as I was > working on data from a time series). The reverse, using a POD like int must be > possible. Instead of the first argument being float/double, use an int. If that > does not work, you can wrap an int in a UDT, implement some of the operators > like '=', '<', '/' depending on the accumulator you plan to use (I did that as I > needed to send a UDT). > > Using an int still returns a float -- which is quite sensible. You might be able to write a custom extractor which can return an int. I have not explored it. I always thought the type you give as input is the type that gets returned. > By UDT do you mean User Defined Type? > This is an interesting approach. > I didn't realize that the result_type depends on the value type in > that way, I didn't see any UDTs mentioned in the docs. Yes, I mean writing a class/struct. I had to overload '<', '>', '+=' and '/' and I use it for variance, mean, median, min, max and my implementation of percentile. Remember to specialize std::numeric_limits for the UDT you write. Else, the min and/or max will have values that you have not added in the accumulator (garbage values). I had a tough time debugging it and finding the solution. Also, on Windows, you need to derive your specialization from _Num_base. As for implementing a generic rolling type: 1. You need to store your values in a circular buffer. 2. Each time you add a value into the buffer, pass the contents to a pristine accumulator. This may be sub optimal but works. Especially for those calculations where it is not easy to remove the effect of the first data that you want to pop. I had to do it this way because I was dealing with time series. If I want a rolling computation for a 1 hour window, I might add 1 sample and may have to remove more than 1 sample to ensure first-last is 1 hour window in the buffer. -dhruva Love Cricket? Check out live scores, photos, video highlights and more. Click here http://cricket.yahoo.com

3 2

[mpi] irecv / send problem
by Nick Collier 06 Aug '09

06 Aug '09

I running into an issue where an irecv followed by a send results in deadlock. A simple test case, class Item { private: friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version) { ar & val; } public: int val; Item() : val(1) { } }; struct Receipt { boost::mpi::request request; std::vector<Item> items; }; int main(int argc, char **argv) { mpi::environment env(argc, argv); mpi::communicator world; Receipt receipt; vector<Item> msg(100000); int other = world.rank() == 0 ? 1 : 0; cout << world.rank() << " irecv from " << other << endl; receipt.request = world.irecv(other, 0, receipt.items); cout << world.rank() << " sending to " << other << endl; world.send(other, 0, msg); receipt.request.wait(); cout << "Done" << endl; } Run with mpirun -np 2, this never completes. It does complete with vector<Item> msg(10) however. Nick

5 7

Boost.test applicability
by Joel Falcou 01 Aug '09

01 Aug '09

I have a alrge number of numeric functions (~300) overloaded on various types. What I want to do is having some automated test that check if those functions returns proper values and behave correctly in term of precision. I get a look at Boost.Test but i can't really see if it's applicable to my need and, if it is, how exactly am I supposed to generate that much test and cover all cases (random value testing, singular value test, nan/inf handling etc...). My first idea was to use Boost.preprcoessor file iteration to quickly generate BOOST_TEST_CASE functions but I'm not sure this is a scalable practice. Other point, I saw that there is check in Boost.test which check for an arbitrary precision result. However it uses raw value (like 0.001) where having a check based on ULP or RMS maybe better. Is there anyway to integrate those test using existing test framework ? Thanks in advance

3 4

Boost Serialization: undefined reference to `__assert'
by Kesseli Pascal 31 Jul '09

31 Jul '09

Hello everyone Today, I just happened to download the latest version of cygwin, including gcc 3.4.4. While a simple hello world works perfectly fine, trying to compile this code using a statically linked libserialization.a results in dozens of linker errors, all stating "undefined reference to `__assert'". #include <boost/assign/list_of.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/lambda/lambda.hpp> #include <boost/serialization/vector.hpp> #include <iostream> #include <fstream> using namespace boost::lambda; using namespace boost::assign; using namespace boost::archive; using namespace boost::serialization; using namespace std; int main() { { vector<string> v = list_of("123")("Boost")("Serialization"); ofstream ofs("test.xml"); xml_oarchive oxml(ofs); oxml << make_nvp("VectorTest", v); } { vector<string> v; ifstream ifs("test.xml"); xml_iarchive ixml(ifs); ixml >> make_nvp("VectorTest", v); for_each(v.begin(), v.end(), cout << _1 << "\n"); } return 0; } Is this a problem or known issue when using cygwin? I'm using eclipse in addition, by the way. The code works perfectly fine on other platforms, so I imagine it must be a problem when using the serialization library with cygwin. Thanks in advance for any help you can offer me here and best regards Pascal Kesseli

4 3

UTF-16
by Robert Dailey 24 Jul '09

24 Jul '09

Hi everyone, I did a bit of googling to see if Boost 1.39 as any portable support for UTF-16 encoded strings, but I did not find any. I'm currently using wxWidgets in my application, and I need a decent string object to use. I know that wxWidgets has UTF-16 string support through wxString, however I do not want to expose this object in my interfaces. I want to remain as abstracted away from wxWidgets as possible. Having said that, if someone could tell me if there is any existing UTF-16 string support in Boost, I'd appreciate it. I did not find anything in the vault, sandbox, or trunk in Boost. If boost has no such string object, could someone give me a head start on where to look? Thanks.

9 15

[math] finding c such that w1/c+...+wn/c < math::tools::max_value<T>()
by er 21 Jul '09

21 Jul '09

Hi All, A little while back the following code was suggested to find c such that (x/c)+(y/c) <= C = math::tools::max_value<T>() template<class T>// static T scale_to_max( const T& x, const T& y ) { double max = (std::numeric_limits<T>::max)(); if(x > max - y) { double c = x/max + y/max; while(!boost::math::isinf(x/c + y/c)) { c = boost::math::float_prior(c); } while(boost::math::isinf(x/c + y/c)) { c = boost::math::float_next(c); } return(c); } else { return(static_cast<T>(1)); } } I'm now trying to generalize this i.e. find c such that w1/c+...+wn/c <= C: 1) split w1,..,wn into maximal size, sum less than C, subgroups. 2) apply scale_to_max iteratively over adjacent groups. This does not always suceed (see example at the bottom). Any suggestion would be appreciated. *.hpp template<typename T> class scale_sum_to_max{ public: typedef void result_type; typedef T argument_type; scale_sum_to_max(T cum_sum):cum_sum_(cum_sum),c_(static_cast<T>(1)){} scale_sum_to_max():cum_sum_(static_cast<T>(0)),c_(static_cast<T>(1)){} void operator()(T x){ if( math::isinf(scaled_sum()+(x/c_)) ){ T s = scale_to_max( scaled_sum(), x/c_ ); cum_sum_ /= s; c_ *= s; BOOST_ASSERT(!math::isinf(cum_sum_+x/c_)); } cum_sum_ += x/c_; } T scaling_factor()const{ return c_; } T scaled_sum()const{ return cum_sum_; } private: T cum_sum_; T c_; }; template<typename T> class finite_sums{ typedef std::vector<T> cont_t; public: typedef void result_type; typedef T argument_type; finite_sums() { coll_.push_back(static_cast<T>(0)); } void operator()(T x){ if(math::isinf(sum()+x)){ coll_.push_back(x); }else{ coll_.back() += x; } } const cont_t& collected()const{ return coll_; } T scaling_factor()const{ return for_each( begin(coll_), end(coll_), scale_sum_to_max<T>() ).scaling_factor(); } private: T sum()const{ return coll_.back(); } cont_t coll_; }; }} *.cpp typedef double value_t; typedef std::vector<value_t> vec_t; const unsigned n = 1e5; //n = 1e3 OK value_t w = math::tools::max_value<value_t>(); w /= 2; vec_t vec_w(n,w); value_t scaling_factor = for_each( begin(vec_w), end(vec_w), math_limit::finite_sums<value_t>() ).scaling_factor(); //assertion failed: (!math::isinf(cum_sum_+x/c_))

2 2

[Math Toolkit] Gamma Distribution
by Christian Henning 21 Jul '09

21 Jul '09

Hi there, the documention of the gamma distribution talks about two different forms. How can can generate the second one with shape=1 and scale=1? I know how to get the first form: boost::math::gamma_distribution<> dist( 1, 1 ); I don't see how to get the second one? Thanks, Christian

5 13

[Q] regular expressions change the 'substitue with' value
by V S P 14 Jul '09

14 Jul '09

Looking for some help with how to use regular expression library I have a string "!1!" I am replacing it with "\temp\i\otrq92rq40100__db1003.xls" ( a windows path to a file) This is how I am doing it std::string repl=subst_designator+ boost::lexical_cast<std::string>(counter)+ subst_designator; boost::algorithm::replace_all_regex(new_arg, boost::regex(repl),*res_it); Where: subst_designator = '!' counter = 1 new_arg = "!1!" *res_it="\temp\i\otrq92rq40100__db1003.xls" after the above code, the new_arg contains a strange string that appears to have back slashes removed and the first \t replaced with something like a 'tab' new_arg=" empiotrq92rq40100__db1003.xls" I am thinking that this is wrong, because the regular expression should copy without modifications the value of *res_it into the new_arg I am using 1.38 on windows with VS9. My question is , how can make it so the string in *res_it substitutes !1! thank you in advance, Vlad -- Vlad P author of C++ ORM http://github.com/vladp/CppOrm/tree/master -- http://www.fastmail.fm - IMAP accessible web-mail

3 7

[array] GCC 4.2 warnings with array initialization
by Allen Cronce 13 Jul '09

13 Jul '09

Hi all, When building with boost 1.36 and GCC 4.2 under Xcode, the following code produces a warning: boost::array<int, 2> warningArray = { 1, 2 }; warning: missing braces around initializer for 'int [2]' We see no warnings with GCG 4.0. We have a zero warning tolerance. All warnings are counted as errors. The boost::array documentation indicates that the single brace approach should work for conforming compilers, according to 8.5.1 (11) of the Standard. So does that mean that GCC 4.2 is non-conforming? Sure enough, when I change the code to include a second set of braces, the warning is gone: boost::array<int, 2> noWarningArray = { { 1, 2 } }; But this is a problem as we move to GCC 4.2 because a) we use initialized arrays all over the place, so this means a lot of little changes, and b) requiring an extra set of braces is counter intuitive and irritating at best. I don't like the idea of making the above code changes, and I don't want to globally disable the warning because it might be useful for other code. Does anyone have a better solution? Thanks in advance for any suggestions. Best, -- Allen Cronce

4 3

Some of Boost Regex++ not recognized
by lsimons 13 Jul '09

13 Jul '09

<hoping this isn't a double post. Had some trouble with connection first time> I really appreciate the work done on the Boost libraries. I've used them in other projects and it's always been a welcome relief. For my current project, I'm trying to use the Boost Regex++ library in MSVC++ 6.0 (under Vista) to do some basic regex. I've installed the libraries as per the tutorial and added the Boost path to my compiler and linker includes. A lost of the basic functionality works fine, but I'm having trouble with autocompletion. The bigger issue is that certain parts of the library seem to throw the compiler. Ex that comiples fine: #include "stdafx.h" #include <boost/regex.hpp> #include <string.h> using namespace std; using namespace boost; int main(int argc, char* argv[]) { regex expr("^&[a-zA-Z0-9_ ]+,\\s+[a-zA-Z0-9_ ]+,\\s+[0-9].+"); string text = "&AirSpeed_Error, tla_error, 2 \\test stuff"; bool result; result = regex_match(text,expr); if (result == true) cout << "Match" << endl; else cout << "No Match" << endl; return 0; } If I add the line "match_flag_type flags = match_default;" I receive three errors: C:\Users\me\Documents\test\test.cpp(30) : error C2065: 'match_flag_type' : undeclared identifier C:\Users\me\Documents\test\test.cpp(30) : error C2146: syntax error : missing ';' before identifier 'flags' C:\Users\me\Documents\test\test.cpp(30) : error C2065: 'flags' : undeclared identifier Error executing cl.exe. I think I might simply have something misconfigured in MSVC6, and I would appreciate any comments or suggestions towards resolving the issue. Please let me know if there's any additional info I can provide. Thanks, Louis -- View this message in context: http://www.nabble.com/Some-of-Boost-Regex%2B%2B-not-recognized-tp24219036p2… Sent from the Boost - Users mailing list archive at Nabble.com.

3 4

Boost ASIO - SO_LINGER Socket option is not working
by Nick Aschberger 07 Jul '09

07 Jul '09

Hi All, I have a situation where at termination of my program, I am closing my socket, and then deleting the socket object. Note, we are using non-asynchronous (blocking) accesses at this point, boost is version 1.36. In some cases, the socket has had some data written to it, but that data is never received by the connected client - because I destroy the socket before the data is sent. So, SO_LINGER is the socket option that is supposed to solve all my worries (it should wait on close for any unsent data to be sent), however I am using it and there is no effect. I presume because I'm doing something wrong. Here is my psuedo-code flow: /* Creation of socket */ m_socket = new boost::asio::ip::tcp::socket(m_io_service); /* Connect the socket with something like: */ acceptor.accept(*m_socket, error); /* Set SO_LINGER option on connected socket */ boost::asio::socket_base::linger linger_op(true, 2000); m_socket->set_option(linger_op); /* program executes, does some stuff */ /* At termination */ // close the socket m_socket->close(); delete(m_socket); I experimented with m_socket->shutdown() instead of close, and it made little difference. In fact, from the documentation it seems shutdown() is the one I definitely don't want to call, as close() is supposed to wait for data to be sent. If anyone has some suggestions as to what would be correct, I would much appreciate it. cheers Nick Aschberger

3 5

[Interprocess] Compilation errors for atomic operations.
by d s 06 Jul '09

06 Jul '09

I am using managed_shared_memory to implement a cache. However during compilation I get the following error - g++ -o .build/CacheLib/cachebase.pic.o -c -fPIC -m64 -g -isystem /usr/local/include/c++/3.4.2 -isystem /usr/local/include/c++/3.4.2/sparc-sun-solaris2.9 -isystem /usr/include -isystem /usr/local/include-isystem /usr/local/lib/gcc/sparc-sun-solaris2.9/3.4.2/include -isystem /usr/include/sys -nostdinc -nostdinc++ -I/usr/local/include/boost-1_39 -I/geneva1/apps/IRB_2.2.30/2.2.30_CURRENT/include -I/oracle/product/9.2.0/rdbms/demo -I.build/CacheLib -Isrc/CacheLib -I/usr/local/include/log4cpp src/CacheLib/cachebase.cpp In file included from /usr/local/include/boost-1_39/boost/interprocess/detail/managed_open_or_create_impl.hpp:20, from /usr/local/include/boost-1_39/boost/interprocess/managed_mapped_file.hpp:20, from src/CacheLib/cachebase.h:12, from src/CacheLib/cachebase.cpp:8: /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp: In function `boost::uint32_t boost::interprocess::detail::atomic_add32(volatile boost::uint32_t*, boost::uint32_t)': /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp:331: error: `atomic_add_32_nv' undeclared (first use this function) /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp:331: error: (Each undeclared identifier is reported only once for each function it appears in.) /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp: In function `boost::uint32_t boost::interprocess::detail::atomic_cas32(volatile boost::uint32_t*, boost::uint32_t, boost::uint32_t)': /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp:341: error: `atomic_cas_32' undeclared (first use this function) /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp: In function `boost::uint32_t boost::interprocess::detail::atomic_inc32(volatile boost::uint32_t*)': /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp:347: error: `atomic_add_32_nv' undeclared (first use this function) /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp: In function `boost::uint32_t boost::interprocess::detail::atomic_dec32(volatile boost::uint32_t*)': /usr/local/include/boost-1_39/boost/interprocess/detail/atomic.hpp:353: error: `atomic_add_32_nv' undeclared (first use this function) scons: *** [.build/CacheLib/cachebase.pic.o] Error 1 scons: building terminated because of errors. I am using gcc version 3.4.2 on solaris 9. Reading specs from /usr/local/lib/gcc/sparc-sun-solaris2.9/3.4.2/specs Configured with: ../configure --with-as=/usr/ccs/bin/as --with-ld=/usr/ccs/bin/ld --disable-nls Thread model: posix gcc version 3.4.2 Kindly advice what is the problem? Is there any way I can use pthread atomic operation instead to solaris atomic operations. Note: The same code is working fine on RHEL Enterprise 5 and Hp-UX.

1 1

A question on overloaded function? Can anyone with kindness help me?
by fmingu 05 Jul '09

05 Jul '09

I use Dev-C++,and the snipet of the program is: #pragma hdrstop # include <iostream> # include <vector> # include <iterator> # include "boost/math/common_factor.hpp" # include "boost/lambda/lambda.hpp" # include "boost/lambda/bind.hpp" # include "boost/lambda/if.hpp" # include "boost/lambda/casts.hpp" # include "boost/lambda/construct.hpp" # include "boost/lambda/loops.hpp" # include "boost/lambda/switch.hpp" # include "boost/tuple/tuple.hpp" # include "boost/tuple/tuple_comparison.hpp" # include <string> # include <map> using namespace std; using namespace boost::lambda; using namespace boost; void a(){ std::cout<<std::pow(4,3); return; } ............... but the complier told me that: main2test.cpp: In function `void a()': main2test.cpp:69: call of overloaded `pow(int, int)' is ambiguous F:/CB2009/Dev-Cpp/include/math.h:162: candidates are: double pow(double, double) F:/CB2009/Dev-Cpp/include/c++/cmath:401: float std::pow(float, float) F:/CB2009/Dev-Cpp/include/c++/cmath:410: long double std::pow(long double, long double) F:/CB2009/Dev-Cpp/include/c++/cmath:419: double std::pow(double, int) F:/CB2009/Dev-Cpp/include/c++/cmath:423: float std::pow(float, int) F:/CB2009/Dev-Cpp/include/c++/cmath:427: long double std::pow(long double, int) And in my computer, the C++ libraries includes are F:\CB2009\Dev-Cpp\include\c++ F:\CB2009\Dev-Cpp\include\c++\mingw32 F:\CB2009\Dev-Cpp\include\c++\backward F:\CB2009\Dev-Cpp\include F:\CB2009\boost_1_34_1\boost_1_34_1 I do not know how to solve it.I do not use <math> or <cmath> yet. Why the complier told me such files? And whether the two files are included in other files or not? And can I use: bind(&std::pow,constant(-1),bind(&IIPrimemap::size,var(primemapvec))); in the program? where : typedef std::pair<int, int> IIPrimepair; std::vector<IIPrimepair> primepairvec; Can anyone with kindness help me?

3 4

[Boost.Test] [1.38] Handling unexpected exceptions and system errors
by Greg Christopher 04 Jul '09

04 Jul '09

Hi, One of the things that sets boost apart from other frameworks is its ability to handle exceptions and report them. While I've used the BOOST_CHECK_THROW and BOOST_CHECK_EXCEPTION macros, I'd like a way to pass if an exception is thrown that we don't necessarily understand how to mention in the BOOST_CHECK_THROW or BOOST_CHECK_EXCEPTION macros. BOOST_CHECK_NO_THROW just makes sure no exception is thrown. In some ways it's an odd request to say "I expect some exception to be thrown that I do not care to specify", but that would work for us. In addition, it would be nice (and I bet it's already available) to be able to say "allow next test case to run in event of exception" or "allow next test suite to run In event of exception". Right now, all testing does seem to abort (none of the above macros are either present or coded in a way to match the system issue. Any tips on how to discover those values, or to go forward when some kind of exceptional condition is expected is appreciated. -Greg

2 3

Support of Pretty print
by Mario Chacon 02 Jul '09

02 Jul '09

Hello: Is is possible that boost have gdb pretty prints??.. It's works great with std objects, it will be awesome if boost have it too!! Salu2... masch...

5 6

[interprocess] named_upgradable_mutex
by Moritz 02 Jul '09

02 Jul '09

Hi everybody, I have a question concerning the interprocess::updgradable::mutex. My scenario: I have a writer, which is manipulating an object in a interprocess::managed_shared_memory. And I have 'n' readers which are reading the object in the shared mem. If the writer is ready to write, it should get the possibility as fast as possible. So this is a variety of the classical readers/writers problem and I already found a good solution that fits my requirements. But this solution uses 3 mutexes and 1 counter so I am looking for a more efficient solution. The idea is that the writer locks the upgradable_mutex normally (calling lock()) and the readers lock it sharable (calling lock_sharable()). If the mutex is locked sharable and the writer tries to lock it normally, another attempt to lock it sharable has to wait until the writer succeeded in locking and unlocking the mutex. Is this correct proceeding? Thank you Moritz

2 3

python context scope question
by Christopher Harvey 02 Jul '09

02 Jul '09

I'm running a bunch of python scripts from a directory, one after the other. I want to make sure that those scripts don't interfere with each other. My code looks like this: for(directory_iterator itr(filterDir);itr!=directory_iterator();++itr) { if(itr->path().extension()==".py") { try { object global = import("__main__").attr("__dict__"); object sys = import("sys"); sys.attr("path").attr("append")(str(filterDir)); exec_file(str(itr->path().string()), global, global); } catch(error_already_set const &) { cout<<"Python syntax/runtime error."<<endl; PyErr_Print(); } catch(...) { cout<<"Uknown error from script file: "<<itr->path()<<endl; } } } Basically what I want to know is this: For every iteration of the exterior for loop will any of the scripts that are executed be able to impact in any way another script that is executed? For example, I was thinking a script could remove that path that I want to add from the import search paths and break the next script that is run, since it wouldn't have that path. thanks.

2 1

interprocess::message_queue thread safety
by Moritz 01 Jul '09

01 Jul '09

Hi everybody, I have a question concerning the interprocess::message_queue. Is the send(..) function thread safe? I have one message_queue and only one thread which is reading messages from the queue. But I have 'n' threads that are writing to the queue. Is there any synchronization mechanism needed to avoid unexpected behavior? Thank You Moritz

2 1

Getting started with boost: Linker error on boost::system::get_system_category
by Alex Black 01 Jul '09

01 Jul '09

I'm just getting started with boost: - I'm using boost::asio - I'm on Vista x64, using Visual Studio 2008 SP1 - I built the x64 libs using bjam --address-mode=64 .... - I've got my code compiling (but not linking) - I got it pointed to the libs, so it finds the datetime, regex lib etc I get these errors: Error 84 error LNK2001: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (?get_system_category@system@boost@@YAAEBVerror_category@12@XZ) Error 85 error LNK2001: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (?get_generic_category@system@boost@@YAAEBVerror_category@12@XZ) any tips? thx - Alex

3 3

String, vector type with stack-allocated internal array (and dynamic array fallback)?
by Boris Dušek 01 Jul '09

01 Jul '09

Hello, for performance reasons, I would like not to have to have a std::wstring (1 allocation/1 deallocation of its character array) in one routine and instead have a wchar_t[MAXSIZE]. But I also would like my code to be correct for sizes bigger than MAXSIZE. Is there some type (in boost or elsewhere, preferable for both basic_string and vector) that defaults to stack-allocated array of some size (preferably configurable by a template parameter), and in case of overflow (i.e. push_back or insert when it's full), would allocate a dynamically-allocated array? This is how it works on MSVC with their STL basic_string implementation, just the array size is unconfigurable (16 bytes including null-terminating byte). I would obviously choose the MAXSIZE so that 99.9% of cases are handled by the stack-allocated array. Thanks, Boris

2 3

[asio] async_read and 100% CPU
by Etienne Philip Pretorius 01 Jul '09

01 Jul '09

Hello list, Could someone please shed some light on this subject. It seems that me read handler keeps on being called even when there has been no data transferred... Here is the accept handler that starts off the read handler (All methods are part of the same class, namely 'client'): /* Accept Handler */ void handle_accept( const boost::system::error_code& error ) { client* c; switch(error.value()) { case boost::system::posix_error::success: { c = new client(); socket.async_receive( boost::asio::buffer( buffer ),boost::bind( &client::handle_read, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred ) ); break; } case boost::system::posix_error::interrupted: case boost::system::posix_error::connection_aborted: { c = this; break; } default: { throw error; } } acceptor.async_accept( c->socket, boost::bind( &client::handle_accept, c, boost::asio::placeholders::error ) ); }; And here is the read handler.... /* Read Handler */ void handle_read( const boost::system::error_code& error, std::size_t bytes_transferred ) { switch(error.value()) { case boost::system::posix_error::success: { if(bytes_transferred > 0) { std::copy( buffer.begin(), buffer.end(), std::back_insert_iterator<std::string>(data) ); break; } } case boost::system::posix_error::interrupted: { socket.async_receive( boost::asio::buffer( buffer ),boost::bind( &client::handle_read, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred ) ); return; } default: { throw error; } } //TODO: parse contents.. }; Using epoll interface, as I am running Ubuntu Jaunty. Calling io_service.run() from the main thread. Thank you, Etienne Pretorius.

4 7

[serialization] Multiple archives in same stream
by Chard 01 Jul '09

01 Jul '09

Pardon me if this issue has been discussed earlier, but is there a particular technical issue why multiple archives cannot be serialized to (or, specifically, de-serialized from) the same stream? (I'm still on 1.38, so slap me if this works with 1.39+). Given the following example: #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/serialization.hpp> void test_ser_app() { { { std::ofstream file("ser.txt"); archive::text_oarchive arch(file); std::string s("Hello World"); arch & s; size_t pos = file.tellp(); // [1] } { std::ofstream file("ser.txt", std::ios::app | std::ios::ate); archive::text_oarchive arch(file); std::string s("Goodbye World"); arch & s; } } // [2] { std::string s1, s2; std::ifstream file("ser.txt"); { archive::text_iarchive arch(file); arch & s1; } size_t pos = file.tellg(); // [3] try { archive::text_iarchive arch(file); arch & s2; } catch (archive::archive_exception &e) { std::cout << e.what() << std::endl; } } } The stream position reported at [1] is (correctly) 42, and examination of the text file (at [2]) shows the two archives serialized okay. However, the stream position at [3] appears to be at the end of the stream. Does the serialization read in a big chunk, regardless of whether it will be processing it all? If I hack in a set stream position at [3], then the library quite happily reads the second archive. Is it possible to have the library leave the stream pointer at the correct end position?

2 1

STLPort Install Before Building Boost 1.39.0
by biolaser 01 Jul '09

01 Jul '09

I'm on Windows XP SP3, msvc71 SP1, and I want to install STLport 5.2.1 before I install/build Boost 1.39.0. The STLport distribution install file (configure.bat) has two options I need help with: "--with-static-rtl" "-with-dynamic-rtl" Does Boost care whether I enable the static (libc.lib family) or whether I enable the dynamic (msvcrt.lib family) C/C++ library when linking with STLport? Then, there is the "-use-boost <boost install path>" option - I assume I should use this STLport option for Boost 1.39.0 - correct? Finally, is there anything I need to do in my building/installing of Boost itself to make sure it knows I have STLport installed? Thanks much! William Stroupe

2 1

[TypeTraits] Is it possible to detect that type is not exist and use default type?
by Sakharuk, Vlad (GMI Development) 30 Jun '09

30 Jun '09

Here is example: class one { public: typedef someclass internal; }; class two { // No internal class }; class default_internal{ }; I would like to be able to write something if it possible: template<class T, class B = if_exist(T::internal) T::internal else default_internal > class proc { }; So I can use proc with both proc<one> One; proc<two> Two; without specifying derived type? Thanks! \/. -------------------------------------------------------------------------- This message w/attachments (message) may be privileged, confidential or proprietary, and if you are not an intended recipient, please notify the sender, do not use or share it and delete it. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Merrill Lynch. Subject to applicable law, Merrill Lynch may monitor, review and retain e-communications (EC) traveling through its networks/systems. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or error-free. References to "Merrill Lynch" are references to any company in the Merrill Lynch & Co., Inc. group of companies, which are wholly-owned by Bank of America Corporation. Securities and Insurance Products: * Are Not FDIC Insured * Are Not Bank Guaranteed * May Lose Value * Are Not a Bank Deposit * Are Not a Condition to Any Banking Service or Activity * Are Not Insured by Any Federal Government Agency. Attachments that are part of this E-communication may have additional important disclosures and disclaimers, which you should read. This message is subject to terms available at the following link: http://www.ml.com/e-communications_terms/. By messaging with Merrill Lynch you consent to the foregoing. --------------------------------------------------------------------------

3 4

Serialization of a universal data type
by Gokulakannan Somasundaram 30 Jun '09

30 Jun '09

Hi, I have started using Boost Serialization in one of my project and thanks for the library. I may be asking a question that might have got repeated, but i did my search on the forums but couldn't get the relevant answer. I have a data-type which is more like a universal datatype(unsigned long). Consider a 64 bit system and if the value to be stored in this datatype is greater than 8 bytes, then it is stored as value. If the value to be stored is greater than 8 bytes, then it is stored elsewhere and the pointer is stored here. By using other meta-data information, the data is extracted from this data-type. To be exact, i am referring to the datum implementation in open-source database postgresql. If i have to serialize this data-type, i need more info from other variables which store the metadata. The functions, i am trying to implement in Boost serialization are readDatum and _outDatum(similar to load/save). I don't see, how i can do that in Boost serialization, especially because of the signature of the load/save function. It only takes the version and the object to be serialized. How can i pass the other meta-data? I could always create a new data-type(say SerializableDatum) with all the required info, but then this data-type is being created only for the purpose of serialization. Is there any better way to achieve the same result? Thanks, Gokul.

2 2

Using boost::date_time library with wince
by Matt Schuckmann 30 Jun '09

30 Jun '09

Does anybody have any experience with using boost::date_time (boost version 1.37 or later) with windows ce (aka Windows Mobile 5 or Windows Mobile 6) Specifically I'm trying to figure out the best way to get around the missing functions std::localtime() and std::gmtime(). Yes as hard as it is to believe Microsoft choose to leave these 2 simple functions out of wince, imagine that. I'm actually running into this because I'm trying to use boost::thread which uses mostly the header only parts of date_time. The problem crops up when c_time.hpp is included. Thanks in advance for any help Matt Schuckmann

1 0

Using boost with windows mobile 5 or 6.
by Matt Schuckmann 30 Jun '09

30 Jun '09

I'm currently trying to use boost in my Windows Mobile 5/6 (aka WinCE) project and I'm having some real problems. Note the project is a port of a C++ library that is currently used in a Windows application and a Linux application. First let me say I'm using boost 1.37 and Visual Studio 2005 (VC 8), I'm not currently using STLPort. The specific libraries I'm trying to use are Thread, State machine and to some extent Date Time (mostly because Thread makes use of date_time) I'm not finding much of concrete info on how to go about doing thiss. The most help has come from the VeecoFTC regression build setup but that just got me to the point of building the boost library for the thread project. However, when I try to use thread in my project I run into problems specificly: * Wince does not implement std::localtime or std::gmtime which are used by the boost versions of localtime and gmtime in c_time.hpp. (Thread appears to depend on this via the date_time library) * Wince does not implement the standard library file locale. Most of the problems caused by this are solved be defining BOOST_NO_STD_LOCAL however the files compare.hpp and replace.hpp in boost/algorithm/string/ both don't respect the BOOST_NO_STD_LOCAL and they use std::locale a lot. Has anyone else gotten round these problems and if so what did you do? I've never been clear on why many people appear to be using STLPort with boost with winCE (or at least the VeecoFTC build is) is that something I should be doing? If so can I do it just for my WinCE builds? Does anybody know if I'd have more luck with boost 1.39 or even upgrading to Visual Studio 2008 (VC 9)? Thanks Matt Schuckmann

2 3

[boost][graph] problems using reverse_graph adaptor
by Andrey Torba 30 Jun '09

30 Jun '09

I have a Graph type which satisfies concepts: boost::function_requires<boost::GraphConcept<Graph> >(); boost::function_requires<boost::IncidenceGraphConcept<Graph> >(); boost::function_requires<boost::BidirectionalGraphConcept<Graph> >(); boost::function_requires<boost::VertexListGraphConcept<Graph> >(); boost::function_requires<boost::AdjacencyGraphConcept<Graph> >(); when i make a reverse adaptor: boost::make_reverse_graph(g); i receive such errors: 'edges_size_type' : is not a member of 'boost::graph_traits<Graph>' 'edge_property_type' : is not a member of 'Graph' 'vertex_property_type' : is not a member of 'Graph' Why does reverse_graph requires edges_size_type? edges_size_type isn't in BidirectionalGraph, VertexListGraph, PropertyGraph. it is in EdgeListGraph. reverse_graph requires Graph to be `BidirectionalGraph and optionally VertexListGraph and PropertyGraph`. What does `optionally` mean? My graph is not a PropertyGraph. I want just revert edges. -- Regards, Andrey

2 1

[Interprocess] Custom naming for the managed_external_buffer
by Thomas d'Erceville 30 Jun '09

30 Jun '09

Hello, I'm using a mapped file in order to share my objects between many processes and I already have my own kind of key to identify them. So instead of linking them to a <char *> in the function construct(), I would like to use my own type (providing convenient functions such as less(), operator==, ...) So I mean, instead of : MyObject * my_object = mapped_file.construct<MyObject>("object_name"); I want to known if there is a way to write something like : MyKey *object_key*(...) MyObject * my_object = mapped_file.construct<MyObject>(*object_key*); I'm taking a look at the section "Building custom indexes<http://www.boost.org/doc/libs/1_39_0/doc/html/interprocess/customizing_inte…>" but I am not sure to be able to solve my problem with that. Could someone confirm? Best regards, Thomas 2009/6/29 David Larsson <laserallan(a)gmail.com> > Hi! > I'm outputting the progress from an externally executed command line > application using the windows API call OutputDebugString. > This means that I need to convert all line breaking characters to flush > commands to make sure the text is outputted when a new line is received > rather than when some underlying structure finds it suitable to linebreak. > I've created a sink that writes to OutputDebugString and it works great, > however unless I manually insert lots of std::endl (or flushing some other > way) I won't get any output until the buffer is full. > > Is it possible to write an iostream filter that forces a flush on newlines > or is this something I need to handle before feeding data into my stream? > > /David > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

2 1

Boost Interprocess os_file_functions
by Pascal Kesseli 30 Jun '09

30 Jun '09

Hi everyone For a mutual exclusion on a SerialInterface class, I used a Boost Interprocess Mutex, which compiled on MinGW without any problems. Using the same code on my arm-linux-gcc cross compilation tool chain (Version 3.3.2) renders the following error: g++ -I"/home/othmarsen/Documents/Software/C++/MOXA/UC-7112/ewbmeter" -I"/home/othmarsen/Documents/Software/C++/MOXA/UC-7112/pss" -I/opt/c++/boost/boost_1_39_0 -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"Interface/MockSerialInterface.d" -MT"Interface/MockSerialInterface.d" -o"Interface/MockSerialInterface.o" "../Interface/MockSerialInterface.cpp" In file included from /opt/c++/boost/boost_1_39_0/boost/interprocess/sync/emulation/named_creation _functor.hpp:16, from /opt/c++/boost/boost_1_39_0/boost/interprocess/sync/named_mutex.hpp:22, from /home/othmarsen/Documents/Software/C++/MOXA/UC-7112/ewbmeter/ewbmeter/Interf ace/Interface.h:5, from /home/othmarsen/Documents/Software/C++/MOXA/UC-7112/ewbmeter/ewbmeter/Interf ace/SerialInterface.h:5, from ../Interface/MockSerialInterface.h:4, from ../Interface/MockSerialInterface.cpp:1: /opt/c++/boost/boost_1_39_0/boost/interprocess/detail/mpl.hpp:67: warning: all member functions in class `boost::interprocess::detail::is_convertible<T, U>' are private In file included from /opt/c++/boost/boost_1_39_0/boost/interprocess/sync/posix/semaphore_wrapper. hpp:17, from /opt/c++/boost/boost_1_39_0/boost/interprocess/sync/named_mutex.hpp:26, from /home/othmarsen/Documents/Software/C++/MOXA/UC-7112/ewbmeter/ewbmeter/Interf ace/Interface.h:5, from /home/othmarsen/Documents/Software/C++/MOXA/UC-7112/ewbmeter/ewbmeter/Interf ace/SerialInterface.h:5, from ../Interface/MockSerialInterface.h:4, from ../Interface/MockSerialInterface.cpp:1: /opt/c++/boost/boost_1_39_0/boost/interprocess/detail/os_file_functions.hpp: In function `bool boost::interprocess::detail::delete_subdirectories_recursive(const std::string&, const char*)': /opt/c++/boost/boost_1_39_0/boost/interprocess/detail/os_file_functions.hpp: 461: error: `::' does not have a class or union named `stat' Any ideas on that? Thanks and best regards Kessi

2 1

Re: [Boost-users] A question on overloaded function? Can anyone with kindness help me?
by fmingu 30 Jun '09

30 Jun '09

Oh,I made a mistake. And can I use: bind(&std::pow,constant(-1),bind(&IIPrimemap::size,var(primemapvec))); in the program? where : typedef std::map<int, int> IIPrimemap; IIPrimemap primemapvec; the last two lines are corrected.

1 0

[IOSTREAMS] Forcing a flush on newlines
by David Larsson 30 Jun '09

30 Jun '09

Hi! I'm outputting the progress from an externally executed command line application using the windows API call OutputDebugString. This means that I need to convert all line breaking characters to flush commands to make sure the text is outputted when a new line is received rather than when some underlying structure finds it suitable to linebreak. I've created a sink that writes to OutputDebugString and it works great, however unless I manually insert lots of std::endl (or flushing some other way) I won't get any output until the buffer is full. Is it possible to write an iostream filter that forces a flush on newlines or is this something I need to handle before feeding data into my stream? /David

2 1

A question on if_then_else in lambda.Can any one with kindness help me?
by fmingu 30 Jun '09

30 Jun '09

I use Dev-c++, and found a problem: # indcude "boost/lambda/if ............... typedef std::map<int, int> IIPrimemap; IIPrimemap primemapvec; ....................... int nnumber; int switchvalue; ........................ if_then_else(var(nnumber)==1,var(switchvalue)=1, if_then_else(count_if(primemapvec.begin(),primemapvec.end(), bind(&IIPrimemap::value_type::second,_1)>2)>0, var(switchvalue)=2,var(switchvalue)=3)); ........................ But the complier told me that: no matching function for call to `if_then_else(bool, const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>, I do not know how to handle it. Can any one with knidness help me?

2 1

test
by Sergey Skorokhodov 29 Jun '09

29 Jun '09

sorry

1 0

[lambda] shared_ptr's in lambda expressions
by Michael Crawford 29 Jun '09

29 Jun '09

I have the following piece of code: void MultiLog::removeLog(const std::string& name) { std::remove_if(m_logs.begin( ), m_logs.end( ), (boost::lambda::_1 ->* &Log::getName) == name); } Which fails to compile with the typical spectacular list of template error messages, the first of which is "error C2784 ... could not deduce template argument for 'const boost::lambda::lambda_functor<T> &' from 'boost::lambda::detail::member_pointer_caller<RET,A,B>'" I'm assuming that the error is because each element here is a shared_ptr<Log>, rather than a raw pointer to Log. Using bind to wrap shared_ptr::get appears to work: void MultiLog::removeLog(const std::string& name) { std::remove_if(m_logs.begin( ), m_logs.end( ), boost::bind(&Log::getName, boost::bind(&LogPtr::get, _1)) == name); } but is there are way to use the significantly cleaner & clearer member pointer operator syntax while using shared_ptr's? Thanks, MBC

2 1

Spirit error when building serialization
by Pascal Kesseli 29 Jun '09

29 Jun '09

Hi again Running bjam with an mxscaleb-gcc cross compilation toolchain (Version 3.4.3), I repeatedly get the following error line on boost spirit: In file included from ./boost/spirit/home/classic/core.hpp:33, from ./boost/spirit/include/classic_core.hpp:11, from ./boost/graph/detail/read_graphviz_spirit.hpp:32, from ./boost/graph/graphviz.hpp:780, from libs/graph/src/read_graphviz_spirit.cpp:28: ./boost/spirit/home/classic/core/primitives/numerics.hpp:124: Error: Declaration »template<class ScannerT> struct boost::spirit::classic::sign_parser::resultÂ« ./boost/spirit/home/classic/core/parser.hpp:125: conflicts with previous declaration of <class ScannerT> struct boost::spirit::classic::parser<boost::spirit::classic::sign_parser>::resultÂ « As a result, building the serialization library fails. Any ideas on how to fix this here? Thanks in advance and greets Kessi

1 0

Re: [Boost-users] Newbie needs yet more help with serialization-BOOST_SERIALIZATION_SPLIT_FREE
by Adam Szeliga 29 Jun '09

29 Jun '09

On 2007-08-20 11:03, Hector C. wrote: You need include file: #include <boost/serialization/split_free.hpp> Regards Adam

1 0

mpl / preprocessor question
by Zachary Turner 29 Jun '09

29 Jun '09

Is there a way, using some combination of boost preprocessor and mpl, that I can write a class template<class T, int n> class foo { public: void foo(T arg1, T arg2, ..., T argn); }; In other words, generate a function that requires n arguments where n is a template parameter?

2 1

boost.fusion compile error using VC 8: error C2039: 'tag_of' : is not a member of 'boost::fusion::traits::detail'
by Tang Jiangjun 29 Jun '09

29 Jun '09

When I compiled the code snippet as follows, there were some errors about searching tag_of in namespace boost::fusion::traits::detail. But after reviewing the source code, I found the desired tag_of was actually located in namespace boost::fusion::detail. Moreover it will be compiled successfully if adding this full and correct namespace before tag_of in the file <is_sequence.hpp>. Here is code snippet: typedef fusion::vector< int, string > TPerson; TPerson person( 20, "Alan" ); cout << person << endl; Here are compile errors: 1>d:\libraries\boost_1_39_0\boost\fusion\support\is_sequence.hpp(59) : error C2039: 'tag_of' : is not a member of 'boost::fusion::traits::detail' 1> d:\libraries\boost_1_39_0\boost\utility\enable_if.hpp(36) : see reference to class template instantiation 'boost::fusion::traits::is_sequence<T>' being compiled 1> with 1> [ 1> T=TPerson 1> ] 1> d:\samples\boost\fusion\fusion.cpp(28) : see reference to class template instantiation 'boost::enable_if<Cond,T>' being compiled 1> with 1> [ 1> Cond=boost::fusion::traits::is_sequence<TPerson>, 1> T=std::ostream & 1> ] Here is the origin code in <is_sequence.hpp>: namespace traits { template <typename T> struct is_sequence : extension::is_sequence_impl<typename detail::tag_of<T>::type>:: template apply<T> {}; } Here is the modification: namespace traits { template <typename T> struct is_sequence : extension::is_sequence_impl<typename boost::fusion::detail::tag_of<T>::type>:: template apply<T> {}; } I guess this should be a minor bug in boost.fusion.

2 2

Threaded Daemon - boost::mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed.
by John D 28 Jun '09

28 Jun '09

Hi This seems an interesting error. I have an application that when executed as ./execute runs just as fine as can be. However when run with a a daemon that loads on boot, when activated it immediately crashes with. /usr/include/boost/thread/pthread/mutex.hpp:50: void boost::mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed. The cause of the problem clearly is the lack of an in your face shell which I know and is fine. I am wondering what advice anyone might have for having a stable boost threaded tty less executable that will run. I know it is something very small to change likely in the call to execute the application but please any help is appreciated, Thank you, John D

2 1

[asio] STL issues OS X 10.5 (intel)
by Jeffrey Aigner 28 Jun '09

28 Jun '09

I am trying to learn the asio library via the tutorials on the website. I am using XCode on OS X 10.5 (intel). After compiling successfully, I get runtime errors (after program listing): Program: #include <iostream> #include <boost/asio.hpp> #include <boost/date_time/posix_time/posix_time.hpp> int main() { boost::asio::io_service io; boost::asio::deadline_timer t(io, boost::posix_time::seconds(5)); t.wait(); std::cout << "Hello, world!\n"; return 0; } Runtime Errors: Macintosh:Debug jaigner$ ./proxy /Developer/SDKs/MacOSX10.5.sdk/usr/include/c++/4.0.0/debug/ safe_iterator.h:127: error: attempt to copy-construct an iterator from a singular iterator. Objects involved in the operation: iterator "this" @ 0x0x1002b0 { type = N11__gnu_debug14_Safe_iteratorIN10__gnu_norm14_List_iteratorISt4pairIPvPN5boost4asio6detail11timer_queueINS6_11time_traitsINS5_10posix_time5ptimeEEEE10timer_baseEEEEN15__gnu_debug_def4listISG_SaISG_EEEEE (mutable iterator); state = singular; } iterator "other" @ 0x0xbffff4e4 { type = N11__gnu_debug14_Safe_iteratorIN10__gnu_norm14_List_iteratorISt4pairIPvPN5boost4asio6detail11timer_queueINS6_11time_traitsINS5_10posix_time5ptimeEEEE10timer_baseEEEEN15__gnu_debug_def4listISG_SaISG_EEEEE (mutable iterator); state = singular; } Abort trap Any help would be appreciated! --Jeff Aigner

1 0

A question on for_each() and placeholder.Can any one with kindness help me?
by fmingu 28 Jun '09

28 Jun '09

By using Dev-C++, I used lambda expression, I want to know that if I white: typedef std::vector<int> vect1; std::vector<vect1> vect2; vect2 vect2Instance; then std::for_each(vect2Instance.begin(),vect2Instance.end(), std::for_each(_1.begin(),_1.end(),_1+=2)); is legal or not? And if legal ,Does the first two _1's mean a number in vect2 (i.e. a vect1) and the last _1 is a number in vect1(i.e. a int)? Can any one with kindness help me?

2 1

variant within a recursive_variant?
by Matthew L. Creech 27 Jun '09

27 Jun '09

Hi, I'm wondering if anyone has successfully embedded a boost::variant<> within a recursive variant. The program below illustrates what I'm trying to do: ============= #include <vector> #include <string> #include <boost/variant.hpp> typedef boost::variant< double, std::string > a_t; struct b_t { }; typedef boost::make_recursive_variant< a_t, b_t, std::vector<boost::recursive_variant_> >::type c_t; int main() { a_t a(20.0); c_t c(a); return 0; } ============= With GCC, this gives me: ... boost/variant/variant.hpp:1269: error: no matching function for call to 'boost::detail::variant::initializer_root::initialize(void*, double&)' Normal variant-within-a-variant works fine (i.e. if I remove the vector, and just declare c_t without make_recursive_variant<>). And make_recursive_variant<> with plain types works as well (i.e. if a_t is a non-variant type). But I can't figure out how to make the two work together... Any help would be greatly appreciated. Thanks! -- Matthew L. Creech

1 0

How to Compile Boost for All Versions of Visual Studio
by Altaf Navalur 27 Jun '09

27 Jun '09

Hello, I have installed VS 2003, VS 2005 & VS 2008 in my PC. I have to work on all these versions. When I compile boost, it only compiles for VS 2008. How do I compile it for all the three IDE`s? Thanks, Altaf -- An eye for an eye only ends up making the whole world blind.

7 15

fusion::result_of::invoke_function_object and references
by Mike Tegtmeyer 27 Jun '09

27 Jun '09

I have another question regarding compilation failures with fusion. If this has been discussed before, can someone please point me to the right location. If not... Is there some reason the application of result_of::invoke_function_object fails to compile for sequence argument references? ie: result_of::invoke_function_object<doit, fusion::vector<int>&>::type Digging a little, it seems that the failure is due to the size<> operator doesn't work with reference types (or is expecting the reference to be stripped prior to this point). I understand that to avoid unnecessary copies, tiers are typically used but in the case where chains of invoke_function_object would like to be strung together where there is an assignment or construction from the actual return value to a variable declared as the type obtained from result_of (in a fold for example), it seems that the vector copy is unavoidable (at least in my reading) unless the argument vector is a const reference. Is this an oversight or am I missing something? Basically I am trying to string together N function objects in the sequence where the ith object gets called with the result of the i-1th object (where each has a different argument list) using fold and I am running into extraneous copies of the return value. I can post a full example if needed. Thanks in advance, Mike error message: /opt/local/include/boost/fusion/sequence/intrinsic/size.hpp:28: error: const boost::fusion::vector<int, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_>& is not a class, struct, or union type See code below. #include <boost/fusion/container/vector.hpp> #include <boost/fusion/functional/invocation/invoke_function_object.hpp> namespace b = boost; namespace bf = boost::fusion; struct doit { template <typename Sig> struct result; template <typename Self, typename T> struct result< Self(const T &) > { typedef int type; }; template <typename T> int operator()(const T &t) const { return 1; } }; #if !OK typedef bf::result_of:: invoke_function_object<doit,const bf::vector<int>&>::type result_type2; #else typedef bf::result_of:: invoke_function_object<doit,const bf::vector<int> >::type result_type2; #endif int main() {return 0;}

2 2

Compile errors inside boost::asio code I can't affect.
by Michael.Broida＠thomsonreuters.com 27 Jun '09

27 Jun '09

Hi! We've been using Boost 1.38.0: WinXP SP3 on 32-bit box VisualStudio 2005, MSVC++ 8.0, 32-bit builds. I've just rebuilt Boost 1.38.0 on another system for 64-bit builds: Windows Server 2008 Enterprise SP1 VisualStudio 2008, MSVC++ 9.0, 64-bit builds. Found no visible build errors during the Boost build. Yet when I build our own code on the 64-bit system, I get these three compile errors deep inside boost::asio code that I have no control over: >>---------------- error C2664: 'QueueUserAPC' : cannot convert parameter 1 from 'void (__cdecl *)(ULONG)' to 'PAPCFUNC' D:\dev\3rdParty_x64\include\boost\asio\detail\win_thread.hpp 151 >>---------------- error C2664: 'GetQueuedCompletionStatus' : cannot convert parameter 3 from 'DWORD *' to 'PULONG_PTR' D:\dev\3rdParty_x64\include\boost\asio\detail\win_iocp_io_service.hpp 142 >>---------------- error C2664: 'GetQueuedCompletionStatus' : cannot convert parameter 3 from 'DWORD *' to 'PULONG_PTR' D:\dev\3rdParty_x64\include\boost\asio\detail\win_iocp_io_service.hpp 430 >>---------------- The "D:\dev\3rdParty_x64" is where I've installed the includes & libs for Boost and other components. As you can see, those errors are not in our code; they're deep in the ASIO code itself, and I don't see how we could be causing them. I didn't write our code that uses ASIO, so I don't know anything about what ASIO is trying to do there. :( Since I couldn't find any other complaints online about this, I'm flailing around for support. Any pointers would be appreciated. Pertinent data: 64-bit WindowsServer2008 SP1 on Intel 64-bit box VisualStudio2008 SP1 (SP2 is still RC, I think, so we can't use it.) Our projects using "x64" configuration, so uses x64 compiler. Boost built with x64 compiler via: toolset=msvc-9.0 address-model=64 Thanks! Mike This email was sent to you by Thomson Reuters, the global news and information company. Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Thomson Reuters.

3 8

[format] Thread safety of boost::format
by James Madison 26 Jun '09

26 Jun '09

I was browsing the boost::format docs and did not find anything about the Thread safety of boost::format. Essentially I want to craft a bunch of error handling methods like this: void ProcessError(...args...) { static boost::format formatter(...); //Try to save the cost of creating this for every single error //do stuff LOG(boost::str(formatter % ...args...); } This method would be called from many, many threads. Is this considered safe? Is there some general information about the thread safety of boost::format methods somewhere in the docs?

3 2

[MultiArray] Postcondition of assignment
by dariomt＠gmail.com 26 Jun '09

26 Jun '09

Hi list, I see in the MultiArray concept documentation that the operator= has the postcondition (*.this) == x; But if I use overlapping memory this postcondition does not hold. The attached program asserts trying to verify the postcondition. In this program I have a 2D square matrix represented as a multi_array. I then assign column j to row i. Depending on the relationship of i and j and how the implementation of operator= does the traversal over the elements to be copied, the program may not satisfy the mentioned postcondition. May I suggest some note in the documentation about this. Is it possible that the traversal can be done forward or backward to guarantee the said postcondition even in the face of overlapping memory? Thanks. PS: Maybe I'm just using multi_array incorrectly. It that's the case, please do help me to use it correctly. #include <boost/multi_array.hpp> #include <iostream> #include <iterator> typedef boost::multi_array<double, 2> array_type; array_type::array_view<1>::type row(array_type & m, size_t i) { typedef array_type::index_range range; array_type::index_gen indices; return m[ indices[i][range(0,m.shape()[1])] ]; } array_type::array_view<1>::type col(array_type & m, size_t i) { typedef array_type::index_range range; array_type::index_gen indices; return m[ indices[range(0,m.shape()[0])][i] ]; } void print(array_type & m) { typedef array_type::index_range range; array_type::index_gen indices; for (size_t i = 0; i < m.size(); ++i) { array_type::array_view<1>::type r = row(m, i); std::copy( r.begin(), r.end(), std::ostream_iterator<double>(std::cout, " ")); std::cout << std::endl; } std::cout << std::endl; } int main() { typedef array_type::index index; array_type A(boost::extents[3][3]); int values = 1; for(index i = 0; i < 3; ++i) for(index j = 0; j < 3; ++j) A[i][j] = values++; print(A); array_type::array_view<1>::type r = row(A, 2); array_type::array_view<1>::type c = col(A, 1); c = r; print(A); // this assert fires because the contents of the row // and the column are not equal after the assigment // the postcondition does not hold assert( c == r ); return 0; }

3 2

[Flyweight] Enumerating all values in the factory?
by mailinglists 26 Jun '09

26 Jun '09

Hi, thanks for the flyweight library, looks good. Is there a way to enumerate all values in a factory? Consider my use case: I have a large set of data. Each element has a user defined 'tag', implemented as a flyweight<std::string>. Now the user wants to find all elements where the 'tag' matches a regex. Calculating the regex match for all elements in the dataset is expensive. If I could find all matching tags in the flyweight factory first, searching the elements is reduced to comparing two flyweights rather than doing a regex match. Consider: struct data { flyweight<std::string> m_tag; }; vector<data> m_some_data; The straight forward approach is costly: for (iterator i=m_some_data.begin(); i!=m_some_data.end() && regex_match(*i); ++i) ; with the regex match calculated for every element in the vector. A much more efficient solution is to find all elements in the flyweight factory that match the regex and then compare the flyweights. vector<flyweight<std::string> > m_matching_tags=find_matching_flyweights(regex); Now iterating over the data needs to compare two flyweights per data element which should be a lot faster than doing a regex match. Is there a way? Regards Hajo

2 1

[MultiArray] Get resize + copy in multi_array::operator=
by dariomt＠gmail.com 26 Jun '09

26 Jun '09

Hi list, What is the recommended way to get resize + copy behavior in multi_array's operator=? Should I patch boost source, wrap a multi_array object, inherit from multi_array? I guess I'm not the only one willing to get the usual semantics from the operator= of this container. TIA

1 0

How to implement ping using boost::asio::ip::icmp
by michael trudgian 26 Jun '09

26 Jun '09

Hoping someone can help me. I am trying to implement a basic ICMP ping using boost::asio. The boost asio library documentation concerning ICMP is pretty scant. It illustrates how to connect an icmp socket, but not how to send an echo request packet, or any other details about how the protocol can be used. If anyone has successfully used boost::asio::ip::icmp, and has some advice on how to use it to implement a simple ICMP ping, I would be greatly appreciative. _________________________________________________________________ POP access for Hotmail is here! Click here to find out more http://windowslive.ninemsn.com.au/article.aspx?id=802246

1 0

problem with boost::program_options - unregistered option in Config File
by Hasanul Ferdaus 25 Jun '09

25 Jun '09

Thanks for your reply. I am using boost::program_options to parse a config file like below --- sample.conf --- node.initiator=true tcp.port=8080 bootstrap.hints={ip{127.0.0.1},tcp(ip,{5002})} ---------------------------- Below I give the code that tries to read the config file sample.conf and tries to get all the options mentioned in file sample.conf - ------- Code ----- void main(){ std::string configFileName("sample.conf"); boost::program_options::options_description *optionsDescription; boost::program_options::variables_map *variablesMap; optionsDescription = new boost::program_options::options_description("Configuration"); variablesMap = new boost::program_options::variables_map(); optionsDescription->add_options() ("tcp.port", "TCP Port Number") ("bootstrap.hints", "Bootstrap Hints"); std::ifstream ifs(configFileName.c_str()); store(parse_config_file(ifs, *optionsDescription, true), *variablesMap); notify(*variablesMap); if (variablesMap->count("node.initiator"){ std::cout <<(*variablesMap)["node.initiator"].as<std::string>() << "\n"; } if (variablesMap->count("tcp.port")){ std::cout <<(*variablesMap)["tcp.port"].as<std::string>() << "\n"; } if (variablesMap->count("bootstrap.hints")){ std::cout <<(*variablesMap)["bootstrap.hints"].as<std::string>() << "\n"; } delete optionsDescription; delete variablesMap; return ; } ----------------- Now, the output is like below - --- output --- 8080 {ip{127.0.0.1},tcp(ip,{5002})} --------- But the value of the option node.initiator (i.e. "true") is not shown, also there is no exception. If I pass "false" in the 3rd parameter of parse_config_file() rather than "true", it throws exception, as it should do. But my question is, why "node.initiator" option is not in the variablesMap, as parse_config_file() should have parsed both registered and unregistered options. Surely if(variablesMap->count("node.initiator") does not pass. In the following link, it is mentioned that "allow_unregistered = false" is the default argument for parse_config_file() function, but I am surely passing "true" in my code. http://www.boost.org/doc/libs/1_38_0/doc/html/boost/program_options/parse_c… In another post you mentioned that SVN HEAD supports unregistered options in config file. Just now I have build the program_option library from boost svn, but there is no difference in the result. Awaiting your response. Thank you. --- On Thu, 6/25/09, Hasanul Ferdaus <sunny_register(a)yahoo.com> wrote: From: Hasanul Ferdaus <sunny_register(a)yahoo.com> Subject: problem with boost::program_options To: boost-users(a)lists.boost.org Date: Thursday, June 25, 2009, 9:41 AM Hi, I am trying to parse unregistered options using boost::program_options for config files but it does not recognize the unregistered options. the code is like to the following - -------------------------------- boost::program_options::options_description *optionsDescription; boost::program_options::variables_map *variablesMap; optionsDescription->add_options() ("ariba.bootstrap.hints", "Bootstrap Hints"); std::ifstream ifs(configFileName.c_str()); store(parse_config_file(ifs, *optionsDescription, true), *variablesMap); notify(*variablesMap); ---------------------------------- As it says, passing true to the 3rd argument of parse_config_file() should allow unregistered options to be parsed, but it does not recognize any unregistered options in config file. If anyone knows how to enable unregistered options in config file, please respond. Thanks in advance. Sunny

2 1

Re: [Boost-users] [Boost.Test] [1.38] Automated test suie registration with muti-file-test-modules
by Greg Christopher 25 Jun '09

25 Jun '09

> > > > Hi, > > We are starting to expand the number of test modules and are having > > some growing pains. > > > > Originally we were using the "single header" variant > > included/unit_test.hpp file. Now we have switched > to linking to the > dynamic version of the boost test library > and are including > auto_unit_test.hpp. > > Just unit_test.hpp is fine. Older name is deprecated. Ok- hopefully that's true for the version mentioned in the subject line. > > > We have been counting on the Test Tools to automatically register > > suites and test cases. This still worked when we just included > > unit_test.hpp (instead of included/unit_test.hpp). > > > > However with multiple test modules, init_unit_test_suite is being > > defined in each module. > > This should work as you expect. Please post simple example > illustrating your issues. Test1.cpp: ----- #include "stdafx.h" #define BOOST_TEST_MODULE foo2 #include <boost/test/execution_monitor.hpp> #include <boost/test/unit_test.hpp> class DefaultFixture { public: DefaultFixture() { } ~DefaultFixture() {}; }; BOOST_AUTO_TEST_SUITE(foo2) BOOST_FIXTURE_TEST_CASE(foo2, DefaultFixture) { BOOST_CHECK(4 == 4) } ----- Test2.cpp: ----- #include "stdafx.h" #define BOOST_TEST_MODULE foo #include <boost/test/execution_monitor.hpp> #include <boost/test/unit_test.hpp> class DefaultFixture { public: DefaultFixture() { } ~DefaultFixture() {}; }; BOOST_AUTO_TEST_SUITE(foo) BOOST_FIXTURE_TEST_CASE(foo, DefaultFixture) { BOOST_CHECK(4 == 4); } BOOST_AUTO_TEST_SUITE_END() ----- And Link with boost library.... 1>TestCase2.obj : error LNK2005: "class boost::unit_test::test_suite * 1>__cdecl init_unit_test_suite(int,char * * const)" 1>(?init_unit_test_suite@@YAPAVtest_suite@unit_test@boost@@HQAPAD@Z) 1>already defined in basic.obj Googling around, I discovered this cryptic define done in one of the files will fix it: ----- #define init_unit_test_suite init_auto_unit_test_suite ----- A strange observation as well.... Take this code: #include "stdafx.h" #define BOOST_TEST_MODULE foo #include <boost/test/execution_monitor.hpp> #include <boost/test/unit_test.hpp> class DefaultFixture { public: DefaultFixture() { } ~DefaultFixture() {}; }; BOOST_AUTO_TEST_SUITE(foo) BOOST_FIXTURE_TEST_CASE(foo, DefaultFixture) { BOOST_CHECK(4 == 4); } BOOST_AUTO_TEST_SUITE_END() And change BOOST_FIXTURE_TEST_CASE toBOOST_TEST_CASE(foo)... it won't compile: C:\basic\test2.cpp(21) : error C2882: 'foo' : illegal use of namespace identifier in expression c:\code\main\test\bora-vmsoft\svga\tests\bat\basic\basic\test2.cpp(22) : error C2448: 'boost::unit_test::make_test_case' : function-style initializer appears to be a function definition ----- Anyway, thanks for your help. The documentation right now seems to be lacking a little bit in giving clear examples of the different styles in which we are able to do test and suite registration. Greg

1 0

changing file output suffixes
by McLemon, Sean 25 Jun '09

25 Jun '09

Hi, Our toolchain generates files ending in ".doj" for objects, so I've been trying to configure my custom toolset module to use this. My original module is based on acc.jam but qcc.jam had something that looked like it would do the trick, so I lifted that and chucked into my module: import type ; type.set-generated-target-suffix OBJ : <toolset>bfin : doj ; type.set-generated-target-suffix STATIC_LIB : <toolset>bfin : dlb ; However my build of Boost now fails, with a fairly long error tracing: smclemo@edin-angus /usr/src/boost_1_39_0 $ bjam toolset=bfin WARNING: No python installation configured and autoconfiguration failed. See http://www.boost.org/libs/python/doc/building.html for configuration instructions or pass --without-python to suppress this message and silently skip all Boost.Python targets Building C++ Boost. After the build, the headers will be located at C:\cygwin\usr\src\boost_1_39_0 The libraries will be located at C:\cygwin\usr\src\boost_1_39_0\stage\lib Use 'bjam install --prefix=<path>' if you wish to install headers and libraries to a different location and remove the source tree. C:/cygwin/usr/src/boost_1_39_0/tools/build/v2/build\property.jam:613: in find-replace from module object(property-map)@1 error: Ambiguous key <target-type>OBJ <asynch-exceptions>off <conditional>@Jamfile</C:/cygwin/usr/src/boost_1_39_0>%Jamfile</C:/cygwi n/usr/src/boost_1_39_0>.handle-static-runtime <debug-symbols>on <define>BOOST_ALL_NO_LIB=1 <define>BOOST_DATE_TIME_STATIC_LINK <define>DATE_TIME_INLINE <exception-handling>on <extern-c-nothrow>off <hardcode-dll-paths>true <host-os>windows <include>. <inlining>off <install-dependencies>off <link>static <main-target-type>LIB <optimization>off <os>NT <preserve-test-targets>on <profiling>off <python-debugging>off <python>2.5 <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <suppress-import-lib>false <symlink-location>project-relative <tag>@Jamfile</C:/cygwin/usr/src/boost_1_39_0>%Jamfile</C:/cygwin/usr/sr c/boost_1_39_0>.tag <target-os>windows <target>object(file-target)@429 <threadapi>win32 <threading>multi <toolset-bfin:version>8.0.7.1 <toolset>bfin <user-interface>console <variant>debug <warnings-as-errors>off <warnings>on <snip> I'm guessing I'm doing something probably a bit stupid or missing something (I'm still at the fiddling around stage yet, so this is very likely). Is anyone in the position to confirm this, or do I need to send the module around? Also is it OK that I'm posting this here, or is there a more appropriate mailing list I should be using? - Sean

2 1

[ptr_container]delete_clone and shared libraries
by Robert Dailey 25 Jun '09

25 Jun '09

On Windows, I plan to create a ptr_vector in a separate DLL and propagate it to the executable for ownership (Factory-style). The executable will be responsible for the lifetime of this ptr_vector, and will eventually result in "delete" being called on each element in the ptr_vector. However, this 'delete' will be from the executable's memory manager, when the memory was originally allocated in the shared library's memory manager, causing serious issues. It would be ideal to specify a delete_clone class that ptr_vector would use (via ADL) and would force those objects in the ptr_vector to use the 'delete' call from the DLL's memory manager, and not the executable's. I don't see that this is going to be possible, or at least able to be done easily. Since the delete_clone's operator will have to be implemented in a CPP file, so it will be included into the shared library. This also implies that I'll have to import the delete_clone's interface, since this DLL will be loaded dynamically with LoadLibrary() in Windows. I just don't see this happening. Now, if ptr_vector had a function like so: ptr_vector::set_deleter() I could give it a pointer to a global function in my DLL, and the deleter becomes fully transparent to my executable. It just has to keep the ptr_vector around and let it fall out of scope and the deleter from the DLL will be used to delete each object in the ptr_vector. However, it isn't this simple and I need advice on how I can make this work. Thanks.

2 1

problem with boost::program_options
by Hasanul Ferdaus 25 Jun '09

25 Jun '09

Hi, I am trying to parse unregistered options using boost::program_options for config files but it does not recognize the unregistered options. the code is like to the following - -------------------------------- boost::program_options::options_description *optionsDescription; boost::program_options::variables_map *variablesMap; optionsDescription->add_options() ("ariba.bootstrap.hints", "Bootstrap Hints"); std::ifstream ifs(configFileName.c_str()); store(parse_config_file(ifs, *optionsDescription, true), *variablesMap); notify(*variablesMap); ---------------------------------- As it says, passing true to the 3rd argument of parse_config_file() should allow unregistered options to be parsed, but it does not recognize any unregistered options in config file. If anyone knows how to enable unregistered options in config file, please respond. Thanks in advance. Sunny

2 1

boost test compile warnings?
by Maróy Ákos 25 Jun '09

25 Jun '09

Hi, I'm having some compile warnings even when compiling very simple boost unit test code, using boost 1.39.0, gcc 4.3.2 on linux x86_64. see the source code at the end of the e-mail, but basically I get the following: g++ -pedantic -ansi -Wno-long-long -Wall -W -O2 -L/tmp/boost/lib -I/tmp/boost/include -o tests tests.cpp In file included from /tmp/boost/include/boost/test/output/compiler_log_formatter.hpp:20, from /tmp/boost/include/boost/test/impl/compiler_log_formatter.ipp:19, from /tmp/boost/include/boost/test/included/unit_test.hpp:18, from tests.cpp:1: /tmp/boost/include/boost/test/utils/basic_cstring/basic_cstring.hpp: In instantiation of ‘boost::unit_test::basic_cstring<const char>’: /tmp/boost/include/boost/test/unit_test_log_formatter.hpp:63: instantiated from here /tmp/boost/include/boost/test/utils/basic_cstring/basic_cstring.hpp:209: warning: type qualifiers ignored on function return type /tmp/boost/include/boost/test/utils/basic_cstring/basic_cstring.hpp:218: warning: type qualifiers ignored on function return type In file included from /tmp/boost/include/boost/test/included/unit_test.hpp:22, from tests.cpp:1: /tmp/boost/include/boost/test/impl/execution_monitor.ipp: In destructor ‘boost::detail::signal_handler::~signal_handler()’: /tmp/boost/include/boost/test/impl/execution_monitor.ipp:678: warning: missing initializer for member ‘sigaltstack::ss_sp’ /tmp/boost/include/boost/test/impl/execution_monitor.ipp:678: warning: missing initializer for member ‘sigaltstack::ss_flags’ /tmp/boost/include/boost/test/impl/execution_monitor.ipp:678: warning: missing initializer for member ‘sigaltstack::ss_size’ In file included from /tmp/boost/include/boost/test/included/unit_test.hpp:31, from tests.cpp:1: /tmp/boost/include/boost/test/utils/basic_cstring/basic_cstring.hpp: In constructor ‘boost::unit_test::test_case_filter::single_filter::single_filter(boost::unit_test::const_string)’: /tmp/boost/include/boost/test/utils/basic_cstring/basic_cstring.hpp:686: warning: type qualifiers ignored on function return type /tmp/boost/include/boost/test/utils/basic_cstring/basic_cstring.hpp:701: warning: type qualifiers ignored on function return type /usr/include/c++/4.3/bits/stl_algo.h: In function ‘char* boost::debug::<unnamed>::prepare_window_title(const boost::debug::dbg_startup_info&)’: /usr/include/c++/4.3/bits/stl_algo.h:190: warning: array subscript is above array bounds /tmp/boost/include/boost/test/floating_point_comparison.hpp: At global scope: /tmp/boost/include/boost/test/floating_point_comparison.hpp:224: warning: ‘boost::test_tools::<unnamed>::check_is_close’ defined but not used /tmp/boost/include/boost/test/floating_point_comparison.hpp:246: warning: ‘boost::test_tools::<unnamed>::check_is_small’ defined but not used the source code is as simple as the following: ----------- 8< -------- cut here ---------- #include <boost/test/included/unit_test.hpp> using namespace boost::unit_test; test_suite * init_unit_test_suite(int, char ** const) { return 0; } ----------- >8 -------- cut here ---------- is this normal? Akos

1 0

Re: [Boost-users] [Accumulators] Questions about the library
by dhruva 25 Jun '09

25 Jun '09

Hello, As a user of this library in production software, I will try to answer a few of the queries that I had asked or solved during my development. ----- Original Message ---- > Date: Wed, 24 Jun 2009 22:19:42 +0300 > From: Adi Shavit > Subject: [Boost-users] [Accumulators] Questions about the library > To: boost-users(a)lists.boost.org > Message-ID: > <8004284c0906241219i73b500cfrecb2d85905b8355d(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > 1. I sometimes need to clear the contents of an accumulator. What is the > best way to do this? Since a pristine or unused accumulator object is quite small (I have not done actual measurements), I just kept 2 variables of the same accumulator type in my C++ wrapper class. I just copied the unused when ever I wanted to reset the accumulator to its original state. One is used for doing all the math and other is used to restore the state. > 2. If my platform does not support HW floating point ops, and all my > sample values are, e.g. ints, is there a way to specify that the > *computation > *and *return value itself* (i.e. result_type, e.g. the mean) will be done > in ints (naturally, at the cost of precision)? I have used UDT as I needed some extra information from the results (as I was working on data from a time series). The reverse, using a POD like int must be possible. Instead of the first argument being float/double, use an int. If that does not work, you can wrap an int in a UDT, implement some of the operators like '=', '<', '/' depending on the accumulator you plan to use (I did that as I needed to send a UDT). > 3. Is there any info about numerical stability of the algorithms used? > For example, there are several > waysto > calculate the variance, not all being equal. > The same goes for algorithmic efficiency and memory requirements. No clue on this, I would like to some complexity information so that I can choose or know the computation impact. > 4. On the same note, is there anywhere that explains/describes the actual > algorithms used? The docs show the formula used to an extent. > 5. Finally, is there an implementation of a rolling (sliding window) > incremental variance computation? Check the mean using circular buffer. I had a similar request and the author was kind enough to implement and share it (Thanks Eric for the prompt guiding you did). See under "boost/accumulators/statistics/rolling*" in Boost 1.38+ "include" folder. -dhruva Cricket on your mind? Visit the ultimate cricket website. Enter http://cricket.yahoo.com

2 1

Boost spirit "%="
by Space Ship Traveller 25 Jun '09

25 Jun '09

Hi, I'm looking at (say): template <typename Iterator> struct employee_parser : qi::grammar<Iterator, employee(), ascii::space_type> { employee_parser() : employee_parser::base_type(start) { using qi::int_; using qi::lit; using qi::double_; using qi::lexeme; using ascii::char_; quoted_string %= lexeme['"' >> +(char_ - '"') >> '"']; start %= lit("employee") >> '{' >> int_ >> ',' >> quoted_string >> ',' >> quoted_string >> ',' >> double_ >> '}' ; } qi::rule<Iterator, std::string(), ascii::space_type> quoted_string; qi::rule<Iterator, employee(), ascii::space_type> start; }; From http://svn.boost.org/svn/boost/trunk/libs/spirit/doc/html/spirit/qi/tutoria… I can't find any information as to what "%=" does. I know that from previous examples int_ % "," parses a list of ints separated by commas, but there is no information as to what %= does. If I took a guess it seems to imply that: r = r % "," - is equivalent to - r %= "," Can someone point me to some documentation? Kind regards, Samuel

2 2

Creating a boost thread in a matlab mex file causes matlab to crash
by bjs109 25 Jun '09

25 Jun '09

I'm having some issues getting matlab and boost threads to work together. I'm posting here and a number of other places as I don't think this problem fits into any one domain. Specifically, whenever I try to use boost threads within a mex file, it causes matlab to crash. My test program is: #include <boost/thread/thread.hpp> #include <boost/bind.hpp> #include "mex.h" class TestClass { public: void run(); }; void TestClass::run() { for (int n = 0; n < 5; n++) { sleep(1); } } void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) { TestClass tc; boost::thread *pThread = new boost::thread(boost::bind(&TestClass::run, &tc)); pThread->join(); } The matlab crash output is as follows Configuration: MATLAB Version: 7.7.0.471 (R2008b) MATLAB License: 166534 Operating System: Linux 2.6.18-128.1.6.el5.centos.plusPAE #1 SMP Thu Apr 2 13:33:12 EDT 2009 i686 GNU C Library: 2.5 stable Processor ID: x86 Family 6 Model 7 Stepping 10, GenuineIntel Virtual Machine: Java 1.6.0_04 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed mode Default Encoding: ISO-8859-1 Fault Count: 1 Register State: eax = 00d6bf00 ebx = 003cf590 ecx = 040571cc edx = 040571d0 esi = 04057124 edi = 00000000 ebp = a72ba3b8 esp = a72ba37c eip = 56e58955 flg = 00010246 Stack Trace: [0] 0x56e58955(0x04057124, 2, 2, 2) [1] libpthread.so.0:0x0038949b(0xa72bab90, 0, 0, 0) Running GDB on the application reveals that at the time of crashing, there are 13 threads. The backtrace for the created thread / parent thread is given below: Thread 13 (created thread) #0 0x56e58955 in ?? () #1 0x0031daf2 in thread_proxy (param=0x4241124) at ./boost/function/function_template.hpp:647 #2 0x0067049b in start_thread () from /lib/libpthread.so.0 #3 0x005c742e in clone () from /lib/libc.so.6 Thread 12 (parent thread) #0 0x003da410 in __kernel_vsyscall () #1 0x00674595 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0 #2 0x0031b164 in boost::detail::condition_impl::do_wait (this=0x4241140, pmutex=0x4241124) at libs/thread/src/condition.cpp:371 #3 0x0031dd51 in thread (this=0x96c9c28, threadfunc=@0x42411cc) at ./boost/thread/condition.hpp:150 #4 0x00e9a7c2 in mexFunction (nlhs=0, plhs=0x42418fc, nrhs=0, prhs=0x424195c) at threadtest.cpp:25 #5 0x003e584f in mexRunMexFile () from /usr/local/matlabR2008b/bin/glnx86/../../bin/glnx86/../../bin/glnx86/libmex.so I am using: CentOS version 5.3 Boost version 1.33.1 (the one that comes with CentOS 5.3) Matlab R2008b release GCC version 4.1.2 (again, the one that comes with CentOS 5.3) The line used to compile the code: mex -g threadtest.cpp -lboost_thread Any ideas? -- View this message in context: http://www.nabble.com/Creating-a-boost-thread-in-a-matlab-mex-file-causes-m… Sent from the Boost - Users mailing list archive at Nabble.com.

2 2

strange nested bind behavior
by Zachary Turner 24 Jun '09

24 Jun '09

I have a couple of classes that all have a few functions with identical names and signatures. Some of these common functions are template functions where one of the arguments to the function is a callback. For example. class Foo { template<typename Handler> void func(int x, Handler callback) }; class Bar { template<typename Handler> void func(int x, Handler callback) }; Somewhere else, I have a class such as: class Test { variant<Foo&, Bar&> variant_obj; void callback(double d, float f, boost::system::error_code ec, size_t s); void test(); }; and i want to invoke func on the object represented by the variant, with the callback going to this->callback, bind the values of d and f from the place I invoke the visitor, and allowing the implementation of func to specify the values of ec and s. Hopefully this makes sense. I've done the following: struct func_visitor : public boost::static_visitor<> { template<typename T, typename Handler> void operator()(T& t, int x, Handler h) const { t.func(x, h); } }; //... void Test::test() { boost::apply_visitor( boost::bind( func_visitor(), _1, 7, boost::protect(boost::bind( &Test::callback, this, 3.0, 5.0f, _1, _2))), variant_obj); } So now, func should expect that Handler has the signature void (error_code, size_t) I compiled it with empty definitions for both occurences of func() just to make sure everything was ok, then I implement one copy of func as follows: template<typename Handler> void func(int x, Handler callback) { callback(make_error_code(success), (size_t)0); } and now I get compilation error pointing to the line above that invokes callback, with the error along the lines of (it's on a different machine with no network access so i can't paste it) void boost::_bi::protected_bind_t<F>::operator()<boost::system::error_code, size_t>(A1&,A2&) const' : cannot convert parameter 2 from 'size_t' to 'size_t &' If I change the above function to the following: template<typename Handler> void func(int x, Handler callback) { size_t temp = 0; callback(make_error_code(success), temp); } then everything works. Is this normal, or is this some kind of bug in either the library or my compiler? All of my function signatures take arguments by value, so I'm not sure why it would want to convert it to a reference first.

3 2

Recursive boost::variant and/or movability?
by Matthew L. Creech 24 Jun '09

24 Jun '09

Hi, I'm using boost::variant<> while parsing an input file to create a AST. The example at: http://www.boost.org/doc/libs/1_39_0/doc/html/variant/tutorial.html#variant… does something very similar. However, it seems that the example usage of boost::recursive_wrapper<> is inefficient, not because of the wrapper itself, but because the creation of a tree of variants becomes more and more costly as that tree grows. The attached example is similar to the tutorial. Creating a nested tree 10,000 deep (with no branching) causes more than 100,000,000 copy-constructions. I.e. since there's no move-awareness, for each single leaf that gets added to the tree we end up creating a new node, adding the leaf to it, then recursively copying over the entire sub-tree up to that point. Creating a move-constructor for the variant type didn't do any good (it was never invoked). But several discussions online (including notes from the original review) imply that boost::variant<> is move-aware. Is this the case? If so, does anyone know how I can get move semantics working using boost::recursive_wrapper<>? I also tried changing the variant type(s) to std::unique_ptr<> rather than boost::recursive_wrapper<>, but that didn't work either (build errors due to non-copyability, specifically in "variant/variant.hpp":404). This is Boost 1.39, and I'm building with GCC 4.4 in C++0x mode. Thanks for the help! -- Matthew L. Creech

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Re: [Boost-users] [Proto] fatal error C1001: An internal error has occurred in the compiler.
by christophe henry 24 Jun '09

24 Jun '09

Thanks to Eric and Joel, it now works. Just for info, the solution: // grammar forbidding address of for terminals struct state_grammar : proto::not_<proto::address_of<proto::_> > {}; // Forward-declare an expression wrapper template<typename Expr> struct make_state; struct sm_domain : proto::domain< proto::generator<make_state>, state_grammar > {}; template<typename Expr> struct make_state : proto::extends<Expr, make_state<Expr>, sm_domain> { typedef proto::extends<Expr, make_state<Expr>, sm_domain> base_type; // Needs a constructor make_state(Expr const &e = Expr()) : base_type(e) {} // Unhide Proto's overloaded assignment operator using base_type::operator=; }; Then, to define a terminal: struct s1: make_state<proto::terminal<state_tag>::type>{}; Thanks a lot! Regards, Christophe _________________________________________________________________ Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx…

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Assertion `!pthread_mutex_destroy(&m)' failed
by nmittal 24 Jun '09

24 Jun '09

Hi, I have a small program that receives messages asynchronously (in their own threads). I am using boost::mutexs to synchronize access.. Please refer to the attached code. boost::mutex mtx_ticker_add; int main(int argc, char *argv[]) { //Handler Ctrl-C signal(2, ctrl_c_handler); while (bRun) { sleep(1); } } void ctrl_c_handler(int sig) { cout << "Received SIGTERM" << endl; bRun=false; } void onMessage( void *msg ){ mtx_ticker_add.lock(); //Do Stuff mtx_ticker_add.unlock(); } the program works fine and responds to messages. however I get the following error when i press CTRL-C mysql_dealer: /usr/local/include/boost-1_39/boost/thread/pthread/mutex.hpp:45: boost::mutex::~mutex(): Assertion `!pthread_mutex_destroy(&m)' failed. any help would be much appreciated. thanks Nishant -- View this message in context: http://www.nabble.com/Assertion-%60%21pthread_mutex_destroy%28-m%29%27-fail… Sent from the Boost - Users mailing list archive at Nabble.com.

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boost::variant usage question
by Zachary Turner 24 Jun '09

24 Jun '09

Suppose I've got a bunch of different classes that all support a common compile-time interface. In other words, a bunch of different classes, each of which has N methods with identical names and signatures but no common base class. I want to make a variant out of all these types, and in addition I want to allow visititation to all of the common methods. Currently I have defined a separate static_visitor derived class for every common method, but this is a little bit annoying. For example, I have currently something like this: struct Foo1 { void f(int); void g(double); void h(string); }; struct Foo2 { void f(int); //Common method void g(double); //Common method void h(float); //Not a common method }; struct visit_f : public boost::static_visitor<> { template<typename T> void operator()(T& t, int i) const { t.f(i); } }; struct visit_g : public boost::static_visitor<> { template<typename T> void operator()(T& t, double d) const { t.g(d); } }; What would be the suggested way of making this more generic, so that I need not have a separate visitor for every method?

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Threads example question
by Anders Wallin 24 Jun '09

24 Jun '09

I'm trying to learn how to use Boost.Threads with this example: http://pastebin.ca/1472832 On Ubuntu 8.04 with Boost 1.34 I'm compiling with a makefile like this: t1: t1.o g++ t1.o /usr/lib/libboost_thread-mt.so -o t1 t1.o: t1.cpp g++ -I /usr/include/boost/ -c t1.cpp However I get very similar execution times for the single-threaded version and the one which creates two threads. What am I doing wrong? thanks, Anders W

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[Accumulators] Questions about the library
by Adi Shavit 24 Jun '09

24 Jun '09

Hi, I've been trying out boost::accumulators and it's quite an amazing library! I'd like to use the library in an embedded setting where floating point operations are very expensive, but accuracy is not crucial (though numerical stability is). I have a few question regarding this library. 1. I sometimes need to clear the contents of an accumulator. What is the best way to do this? 2. If my platform does not support HW floating point ops, and all my sample values are, e.g. ints, is there a way to specify that the *computation *and *return value itself* (i.e. result_type, e.g. the mean) will be done in ints (naturally, at the cost of precision)? 3. Is there any info about numerical stability of the algorithms used? For example, there are several ways<http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance>to calculate the variance, not all being equal. The same goes for algorithmic efficiency and memory requirements. 4. On the same note, is there anywhere that explains/describes the actual algorithms used? 5. Finally, is there an implementation of a rolling (sliding window) incremental variance computation? Thanks for the great library. Adi

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[multi_array] Slices along the N'th dimension of a multi_array in a generic function
by Jesse Perla 24 Jun '09

24 Jun '09

I have a generic function which will take in a boost::multi_array of dimension size N. I need to take slices along the M'th < N dimension (known at compile time). I can't figure out how to do this with the multi_array library and associated ranges/array_views. Is there another way to do this rather than building a boost::indices object directly? Besides the sliced dimension, I will always want the entire ranges for the other ones. I believe the problem is that the index_gen object needs different types as we build the indices in parts. The following code shows what a hardcoded example would look like for N = 4 and M = 3 const std::size_t n_1 = 3; const std::size_t n_2 = 4; const std::size_t n_3 = 5; const std::size_t n_4 = 6; typedef boost::multi_array<double, 4> array_type; array_type vals(boost::extents[n_1][n_2][n_3][n_4]); //...fill the array... typedef boost::multi_array_types::index_range range; typedef boost::multi_array_types::index_gen index_gen_type; //Trying to do this dynamically instead, but in pieces. Note that you need the different autos at each stage since you can't build an index directly? auto slice_indices2 = boost::indices[range(0,n_1)][range(0,n_2)]; //first dimensions auto slice_indices3 = slice_indices2[1]; //Slice dimension.... for the 2nd index. auto slice_indices4 = slice_indices3[range(0,n_4)]; //last dimensions auto vals_slice3 = vals[ slice_indices4 ]; //Take slices with the final object. This is a proper multi_array view cout << vals_slice3[0][0][0] << endl; Thanks, Jesse

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[accumulators] serialization
by er 24 Jun '09

24 Jun '09

Hi All, I'm wondering if there is/will be a way to do serialization with accumulators? Thanks.

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[boost][fusion] generate mpl::vector from fusion::vector
by Andrey Torba 24 Jun '09

24 Jun '09

How to generate fusion::vector from mpl::vector? How to generate mpl::vector from fusion::vector? BOOST_MPL_ASSERT((is_same< fusion::vector<int, char>, generate_fusion_vector<mpl::vector<int, char> >::type >)); BOOST_MPL_ASSERT((is_same< mpl::vector<int, char>, generate_mpl_vector<fusion::vector<int, char> >::type >)); I need generate_fusion_vector and generate_mpl_vector metafunctions. I can write my own metafunctions, but i suspect that they already exist. I generated fusion::map with help result_of::as_map before, so vector generation is the same, but in current boost(trunk, 1.39 also) such error occur: D:\Libraries\boost_trunk\boost/fusion/sequence/intrinsic/size.hpp(56) : error C2903: 'apply' : symbol is neither a class template nor a function template D:\Libraries\boost_trunk\boost/fusion/container/vector/convert.hpp(23) : see reference to class template instantiation 'boost::fusion::result_of::size' being compiled with [ Sequence=boost::mpl::vector ] temp.cpp(71) : see reference to class template instantiation 'boost::fusion::result_of::as_vector' being compiled I don't understand what is going on? -- Regards, Andrey

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MUMPS interface
by Markku Karhunen 24 Jun '09

24 Jun '09

Hi all, On the MUMPS (a MUltifrontal Massively Parallel sparse direct Solver) project website they say: "Karl Meerlenberg has developped C++ bindings for MUMPS. They are available in BOOST, the path is boost/numeric/bindings/mumps/mumps_driver.hpp ". Does anybody know anything about this library? The path seems to be nonsense to me, maybe I'm missing something here? Best, Markku

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Re: [Boost-users] building boost with unsupported compiler
by McLemon, Sean 24 Jun '09

24 Jun '09

Yep we really do have a completely different compiler\toolchain from any currently present, with different switches to GCC, different extensions for compiled objects etc. Of course bjam doesn't need to be built for the target architecture :) It's just that while poking around it looked like bjam needed to have some knowledge about the toolchains it was building for and I suspected that the .jam files in the directory I mentioned earlier were a means to do this. Effectively I want to take steps to make our tools one of the "Builtin tools", mentioned in the help here: http://www.boost.org/boost-build2/doc/html/bbv2/reference/tools.html, so our customers can build Boost with our tools without any fuss. - Sean Date: Tue, 23 Jun 2009 19:00:05 +0400 From: Vladimir Prus <vladimir(a)codesourcery.com> Subject: Re: [Boost-users] building boost with unsupported compiler To: boost-users(a)lists.boost.org Message-ID: <h1qqlh$b7t$1(a)ger.gmane.org> Content-Type: text/plain; charset=us-ascii McLemon, Sean wrote: > Hi, > > > > I'm looking to build Boost with a compiler not currently supported, but > I'm struggling to find information on where I should really begin. It > seems that I'll need to create my own toolset module (something like > ..../boost_1_39_0/tools/build/v2/tools/blackfin.jam) with the > toolchain's specific build switches etc, You should only do that if you really have a custom compiler. For gcc port, the 'gcc' toolset is fine. > rebuild bjam then build Boost. No need to rebuild bjam -- it's a host program. > I presume that boost also has some libraries which may need some > specific options, or tweaking to work but am I getting the gist of it > correctly? Should I be expecting major configuration headaches > (toolchain-specific build\runtime issues aside) in adding a new > architecture? I would not expect too much problems. I know folks were compiling Boost for arm-linux, in particular, with minor issues. - Volodya

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[fusion] BOOST_FUSION_ADAPT_STRUCT private members?
by Stephan Menzel 24 Jun '09

24 Jun '09

Hi there, I'm looking for a way to BOOST_FUSION_ADAPT_STRUCT() private members of a struct. Is this possible? I'd like to parse with spirit2 directly into a struct with getters that should not be bypassed. Cheers, Stephan

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[interprocess]Error compiling my program with boost and GCC
by Laurence Chambenois 24 Jun '09

24 Jun '09

Hello, I use boost 1.38. I try to compile my program that includes <boost/thread.hpp> <boost/interprocess/sync/named_recursive_mutex.hpp> I didn't have any problem to compile boost libraries. But when I compile my program, I've got the following error : In file included from /usr/include/boost-1_38/boost/interprocess/detail/move.hpp:21, from /usr/include/boost-1_38/boost/interprocess/shared_memory_object.hpp:18, from /usr/include/boost-1_38/boost/interprocess/sync/named_recursive_mutex.hpp:23, from /home/Dev/Criteria4/WebTools/WebModules/src/Noyau/cemTask.h:27, from /home/Dev/Criteria4/WebTools/WebModules/src/CriEm/cemAppWebSrv.h:28, from /home/Dev/Criteria4/WebTools/WebModules/src/CriEm/cemAppWebSrv.cpp:19: /usr/include/boost-1_38/boost/interprocess/detail/mpl.hpp:64: attention : all member functions in class `boost::interprocess::detail::is_convertible<T, U> ' are private In file included from /usr/include/boost-1_38/boost/interprocess/shared_memory_object.hpp:31, from /usr/include/boost-1_38/boost/interprocess/sync/named_recursive_mutex.hpp:23, from /home/Dev/Criteria4/WebTools/WebModules/src/Noyau/cemTask.h:27, from /home/Dev/Criteria4/WebTools/WebModules/src/CriEm/cemAppWebSrv.h:28, from /home/Dev/Criteria4/WebTools/WebModules/src/CriEm/cemAppWebSrv.cpp:19: */usr/include/sys/mman.h:145: error: type specifier omitted for parameter ` mode_t' /usr/include/sys/mman.h:145: error: erreur d'analyse syntaxique before `)' token* /usr/include/boost-1_38/boost/interprocess/sync/emulation/named_creation_functor.hpp:38: embrouillÚ par les erreurs prÚcÚdentes, abandon make[1]: *** [/home/Dev/Criteria4/WebTools/WebModules/UseIT/bin/objCriemWeb/cemAppWebSrv.o] Erreur 1 I understand that mode_t is an undefined type. But as mman.h is a standard include file, I don't understand why. Can somebody gives me a help ? I surely forget something important but I don't know what. For informations, I use GCC 3.3.3. Thanks for yours answers Laurence

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Passing lambda placeholders to functions
by Zachary Turner 24 Jun '09

24 Jun '09

It seems very simple, but it's not compiling. int translate(const std::string& str) { return 0; } //all required using declarations are present but omitted for brevity // options_description options; variables_map values; int i; options.add_options() ("test", value<std::string>()->notifier(var(i) = translate(_1))); I get the following error: 'translate': cannot convert parameter 1 from 'boost::lambda::placeholder1_type' to 'std::string'. No user defined conversion operator available that can perform this conversion, or the operator cannot be called. Is this type of usage unsupported for some reason? If I change the variable declaration and the add_options() call to the following it works fine: std::string s options.add_options() ("test", value<std::string>()->notifier(var(s) = _1));

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Boost spirit... classic?
by Space Ship Traveller 24 Jun '09

24 Jun '09

Hi, I'm a bit confused. It seems like all the includes for boost spirit are "classic" i.e. it seems to me I have an old version, but I'm currently using 1.39. I looked on the spirit website and there is no information about the correct way to use the latest version of the spirit framework. The most I found was a post from about a year ago about the "classic" includes. The documentation on the boost website doesn't have any information. Is there some information about this somewhere? What should I be doing to create new parsers? Kind regards, Samuel

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[Proto] fatal error C1001: An internal error has occurred in the compiler.
by christophe henry 24 Jun '09

24 Jun '09

Hi all, Here am I already at the 2nd compiler (VC9SP1) crash of the week (not kidding...): fatal error C1001: An internal error has occurred in the compiler. (compiler file 'f:\dd\vctools\compiler\utc\src\p2\p2symtab.c', line 5809) Attached is a test file producing the problem. The crash happens when I add BOOST_PROTO_DEFINE_OPERATORS. Am I doing something wrong? Sadly, this was a workaround to avoid deriving my class from proto::terminal because of a problem (supposedly) created by the address-of operator. Can someone save my day and tell me if there is a way to deactivate this operator for terminals? Concretely, I have: struct Empty: public state<>, proto::terminal<state_tag> Which brings me, here: &::boost::fusion::at_key<State>(xxx) // xxx being a fusion set containing Empty the following problem: 1>f:\projects\MSM2\SM\boost/msm/back/state_machine.hpp(1061) : error C2784: '::boost::enable_if<is_pseudo_exit<StateType>::type,void>::type boost::msm::back::state_machine<Derived,HistoryPolicy,CopyPolicy>::execute_entry(StateType *,const EventType &,FsmType &,boost::msm::back::dummy<__formal>)' : could not deduce template argument for 'StateType *' from 'const boost::proto::exprns_::expr<Tag,Args,Arity>' 1> with 1> [ 1> Derived=`anonymous-namespace'::player_, 1> HistoryPolicy=boost::msm::back::NoHistory, 1> CopyPolicy=boost::msm::back::DeepCopy, 1> __formal=2 1> ] 1> and 1> [ 1> Tag=boost::proto::tag::address_of, 1> Args=boost::proto::argsns_::list1<boost::proto::exprns_::expr<boost::proto::tag::terminal,boost::proto::argsns_::term<boost::msm::front::state_tag>> &>, 1> Arity=1 1> ] I have another workaround but it requires more typing and is quite ugly, so any help would be greatly appreciated. Thanks, Christophe _________________________________________________________________ Windows Live™: Keep your life in sync. Check it out! http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t1_allup_explore_012009

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[program_options] separating long name and short name
by svarneticist 23 Jun '09

23 Jun '09

Hello, I would like to store an option name in a variable and later use it with variables_map. E.g. const char* incl = "include-path"; options_description desc; desc.add_options()(incl, "include path"); variables_map vm; store(parse_command_line(argc, argv, desc), vm); if(vm.count(incl)) { ... } But if I also want to specify a short name const char* incl = "include-path,i"; ... The answer here is always zero: vm.count(incl) Is there a way to add a short name separately? Thank you Mikhail

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How to build libboost_thread-vc90-mt-sgd-1_39.lib
by luca regini 23 Jun '09

23 Jun '09

With a complete build of boost (running bjam from the main directory) I cannot find libboost_thread-vc90-mt-sgd-1_39.lib. However the same library is linked automatically when I use the thread library within a program build against the Multi-threaded (/MT) runtime of Visual studio 2008. What should I do? Luca

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Re: [Boost-users] [Proto] fatal error C1001: An internal error has occurred in the compiler.
by christophe henry 23 Jun '09

23 Jun '09

> To disable adressof operator, just disable it in your gramamr using > proto::not_ I thought about it, but the problem is that Empty has terminal as base class: struct Empty: public state<>, proto::terminal<state_tag> and thus &Empty will reproduce the problem. Or am I missing something obvious? (answer:probably ;-) ) Christophe _________________________________________________________________ Show them the way! Add maps and directions to your party invites. http://www.microsoft.com/windows/windowslive/products/events.aspx

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building boost with unsupported compiler
by McLemon, Sean 23 Jun '09

23 Jun '09

Hi, I'm looking to build Boost with a compiler not currently supported, but I'm struggling to find information on where I should really begin. It seems that I'll need to create my own toolset module (something like ..../boost_1_39_0/tools/build/v2/tools/blackfin.jam) with the toolchain's specific build switches etc, rebuild bjam then build Boost. I presume that boost also has some libraries which may need some specific options, or tweaking to work but am I getting the gist of it correctly? Should I be expecting major configuration headaches (toolchain-specific build\runtime issues aside) in adding a new architecture? Thanks, - Sean

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[General] Pointer dereferencing by fn call.
by Robert Jones 23 Jun '09

23 Jun '09

Does this template<class T> T& *deref*( T* p ) { return *p; } exist anywhere in Boost? It's the kinda thing you need quite often when using bind, but I can't find it anywhere, which surprised me! Thanks, - Rob.

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Problem with boost.system
by Robert Bielik 23 Jun '09

23 Jun '09

I'm using RCF (C++ IPC framework) and get the following link error on linux: built_components/librcf.a(RCF.o): In function `__static_initialization_and_destruction_0': /home/robi/svn/projects/CacheDaemon/src/ext/boost/boost/system/error_code.hpp:205: undefined reference to `boost::system::get_system_category()' /home/robi/svn/projects/CacheDaemon/src/ext/boost/boost/system/error_code.hpp:206: undefined reference to `boost::system::get_generic_category()' /home/robi/svn/projects/CacheDaemon/src/ext/boost/boost/system/error_code.hpp:211: undefined reference to `boost::system::get_generic_category()' /home/robi/svn/projects/CacheDaemon/src/ext/boost/boost/system/error_code.hpp:212: undefined reference to `boost::system::get_generic_category()' /home/robi/svn/projects/CacheDaemon/src/ext/boost/boost/system/error_code.hpp:213: undefined reference to `boost::system::get_system_category()' built_components/librcf.a(RCF.o): In function `boost::asio::error::get_system_category()': /home/robi/svn/projects/CacheDaemon/src/ext/boost/boost/asio/error.hpp:218: undefined reference to `boost::system::get_system_category()' built_components/librcf.a(RCF.o): In function `error_code': /home/robi/svn/projects/CacheDaemon/src/ext/boost/boost/system/error_code.hpp:312: undefined reference to `boost::system::get_system_category()' built_components/librcf.a(RCF.o): In function `RCF::FilterAdapter::onWriteCompleted(unsigned long, int)': /home/robi/svn/projects/CacheDaemon/src/ext/rcf/src/RCF/AsioServerTransport.cpp:76: undefined reference to `boost::system::get_system_category()' built_components/librcf.a(RCF.o): In function `RCF::FilterAdapter::onReadCompleted(RCF::ByteBuffer const&, int)': /home/robi/svn/projects/CacheDaemon/src/ext/rcf/src/RCF/AsioServerTransport.cpp:65: undefined reference to `boost::system::get_system_category()' collect2: ld returned 1 exit status make[2]: *** [built_components/CacheClient] Error 1 make[1]: *** [CMakeFiles/CacheClient.dir/all] Error 2 make: *** [all] Error 2 And error_code.cpp from boost.system is included AND linked to... besides the whole thing works fine on Windows... :( Ideas? TIA /Rob

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[boost][graph] Efficiency problems in boost::adjacency_list
by Yinghai Lu 23 Jun '09

23 Jun '09

hi, erveryone, I'm building a graph incrementally using boost::adjacency_list with bundled properties. I did the following typedef: typedef boost::adjacency_list<setS, vecS, bidirectionalS, EdgeClass, NodeClass> Graph; EdgeClass and NodeClass is some classes holding the properties of edges and nodes so that I can access them by using g[u].some_property = 1; My problem is that I'm building the graph incrementally and the graph is huge. And with the definition I'm using the vector to hold the vertices, which results in many memory relocation and copy and makes the program stagnate. I wanted to use listS/mapS for the vertex list instead. However, the bundled property seems to work only with vecS only. Otherwise, compilation error will be thrown. So does anyone know how to solve this problem? Thanks. -- Best Regards, Yinghai

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program_options and value<T>
by Zachary Turner 23 Jun '09

23 Jun '09

I want to extend the program_options to support parsing of value types that are not supported by default. For example, parsing of enum types. Suppose I have an enum typedef enum { ValueA, ValueB, ValueC } TestEnum; as well as some other enums. What I'd like to do is something like this: options_description options; variables_map variables; options.add_options() ("test", value<TestEnum>(), "test") ("test2", value<TestEnum2>(), "test2"); etc. So that on the command line I can specify something along the lines of foo.exe --test=ValueA --test2=ValueAA and it will automatically convert them appropriately. Anyone can point me in the direction?

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[BGL] Copy graph
by Caligula 23 Jun '09

23 Jun '09

How can I copy a graph with bundled properties and all? - Caligula

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binary mpl::transform fails to compile with fusion::vector
by Mike Tegtmeyer 22 Jun '09

22 Jun '09

I am hoping someone can point me the in right direction regarding this code snippit failing to compile. My suspicion is that it is a header problem but any help would be appreciated. In short, I seem to be missing why the binary form of mpl::transform won't work with fusion::vector. (unary form works just fine). The code below just attempts to make a std::pair<> from the contents of two sequences (this is just an example to illustrate the transform problem). If the two sequences are mpl::vectors, everything is fine. If they are fusion::vectors then 'lots of errors'. I'm fairly new to both mpl and fusion so I am not ruling out the fact that I have done something stupid. Thanks in advance, Mike See code below. #include <boost/mpl/transform.hpp> #include <boost/mpl/vector.hpp> #include <boost/fusion/include/mpl.hpp> #include <boost/fusion/container/vector.hpp> #include <utility> using namespace boost; struct my_make_pair { template<typename T1, typename T2> struct apply { typedef std::pair<T1,T2> type; }; }; int main(int argc, char *argv[]) { #if 0 typedef mpl::vector<int,long> seq1; typedef mpl::vector<float,double> seq2; typedef mpl::vector<std::pair<int,float>,std::pair<long,double> > pairs; typedef mpl::transform<seq1,seq2,my_make_pair>::type result; BOOST_MPL_ASSERT(( equal<result,pairs> )); #endif typedef fusion::vector<int,long> seq1; typedef fusion::vector<float,double> seq2; typedef fusion::vector<std::pair<int,float>,std::pair<long,double> > pairs; typedef mpl::transform<seq1,seq2,my_make_pair>::type result; BOOST_MPL_ASSERT(( equal<result,pairs> )); return 0; }

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Simple fast parsing
by Christopher Jefferson 22 Jun '09

22 Jun '09

I am currently using in a project a custom-writen recursive-decent parser, which uses an filtering_istream so I can support compressed input. The only functionality used is peekchar, getchar and integer extraction with 'stream >> i'. I am finding that C++ streams, particularly when it comes to integer extraction, are giving terrible performance. In a small test, uncompressing to a buffer and then writing a simple custom reader on that memory buffer gives 10x performance. I would perfer not to write and support such a tool if possible. Is there a boost library which easily supports a parser with 1 character lookahead and simple things like integer extraction? Looking at the documentation, Boost::Spirit seems like a very big hammer to crack this quite small nut, and it is unclear to me how well it would fit into an existing recursive decent parser. Has anyone ever used it as such? Is there a simple alternative? Chris

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[Asio] Confusion with socket.cancel()
by Laurent Fert 22 Jun '09

22 Jun '09

Hi, I am getting confused, could anyone clarify the following points? (Note that I am in a single thread context) 1- After a call to socket.async_send_to(buffer, remote_endpoint, write_handler) followed by a call to socket.cancel() is it possible that the write operation completed before I called cancel() and that my write_handler will be called with no error? 2- After a call to socket.async_send_to(buffer, remote_endpoint, write_handler) followed by a call to socket.cancel() is it possible that some data has actually been written to the socket (let's assume the buffer is quite big) and that then, the operation has been canceled? In such case, would my write_handler be called with both boost::asio::placeholders::error set AND boost::asio::placeholders::bytes_transferred equal to the partial data that has been written? Thanks, Laurent

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Re: [Boost-users] [BGL] Segmentation fault
by Caligula 22 Jun '09

22 Jun '09

Finally fixed it. I forgot this line. property_map < graph_t, set< Colour > edge_properties::*>::type eColours_map = get(&edge_properties::eColours, g); -- Caligula --- On Sun, 6/21/09, Andrew Sutton <andrew.n.sutton(a)gmail.com> wrote: From: Andrew Sutton <andrew.n.sutton(a)gmail.com> Subject: Re: [Boost-users] [BGL] Segmentation fault To: boost-users(a)lists.boost.org Date: Sunday, June 21, 2009, 5:41 AM I put the relevant files on http://www.tinyurl.com/nwj5du . There is a readme file with explanation. It should be pretty simple to get running. I don't think that Steven was volunteering to debug your entire program. Maybe you could just post code that actually shows what those objects are. You should also say where the program crashes. I have a lot of code that embeds containers inside bundled properties. I've never had any problems. Andrew Sutton andrew.n.sutton(a)gmail.com -----Inline Attachment Follows----- _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Re: [Boost-users] Simple fast parsing
by Cory Nelson 21 Jun '09

21 Jun '09

Just write the parser to use forward iterators, then it is trivial to support any source you have. -----Original Message----- From: Christopher Jefferson <chris(a)bubblescope.net> Sent: Sunday, June 21, 2009 1:28 PM To: boost-users(a)lists.boost.org Subject: [Boost-users] Simple fast parsing I am currently using in a project a custom-writen recursive-decent parser, which uses an filtering_istream so I can support compressed input. The only functionality used is peekchar, getchar and integer extraction with 'stream >> i'. I am finding that C++ streams, particularly when it comes to integer extraction, are giving terrible performance. In a small test, uncompressing to a buffer and then writing a simple custom reader on that memory buffer gives 10x performance. I would perfer not to write and support such a tool if possible. Is there a boost library which easily supports a parser with 1 character lookahead and simple things like integer extraction? Looking at the documentation, Boost::Spirit seems like a very big hammer to crack this quite small nut, and it is unclear to me how well it would fit into an existing recursive decent parser. Has anyone ever used it as such? Is there a simple alternative? Chris _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Build error
by David Doria 21 Jun '09

21 Jun '09

I have been unable to build boost-trunk for a while now because of this error: [ 58%] Building CXX object libs/accumulators/example/CMakeFiles/accumulators-accumulators_example.dir/main.cpp.o /home/doriad/src/boost-trunk/boost/accumulators/statistics_fwd.hpp: In function ‘void example1()’: /home/doriad/src/boost-trunk/boost/accumulators/statistics_fwd.hpp:87: error: ‘template<int N> struct boost::accumulators::tag::moment’ is not a function, /home/doriad/src/boost-trunk/boost/accumulators/statistics/moment.hpp:104: error: conflict with ‘template<int T2, class Arg1, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14> typename boost::accumulators::detail::extractor_result<Arg1, boost::accumulators::tag::moment<T2> >::type boost::accumulators::extract::moment(const Arg1&, const A0&, const A1&, const A2&, const A3&, const A4&, const A5&, const A6&, const A7&, const A8&, const A9&, const A10&, const A11&, const A12&, const A13&, const A14&)’ /home/doriad/src/boost-trunk/libs/accumulators/example/main.cpp:63: error: in call to ‘moment’ make[2]: *** [libs/accumulators/example/CMakeFiles/accumulators-accumulators_example.dir/main.cpp.o] Error 1 make[1]: *** [libs/accumulators/example/CMakeFiles/accumulators-accumulators_example.dir/all] Error 2 make: *** [all] Error 2 Is anyone else having this problem? Thanks, David

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Re: [Boost-users] [BGL] Segmentation fault
by Caligula 21 Jun '09

21 Jun '09

Steve, I put the relevant files on http://www.tinyurl.com/nwj5du . There is a readme file with explanation. It should be pretty simple to get running. Thanks Caligula Maybe a dumb question, but what is the vis object? The visitor object . See http://tinyurl.com/nutww8 . The boost: bgl depth first search example. Could you post a complete compilable example? It's a little hard to figure out exactly what you're doing. In Christ, Steven Watanabe _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

3 2

[Boost.Test] valgrind complains about invalid reads
by Peter Klotz 20 Jun '09

20 Jun '09

Boost 1.37.0, Linux, x86_64, gcc 4.1: Valgrind 3.3.1 complains when running this simple test: #define BOOST_TEST_MAIN #include <boost/test/unit_test.hpp> BOOST_AUTO_TEST_CASE( test1 ) { BOOST_CHECK( 1 == 1 ); } The valgrind messages: ==1836== Memcheck, a memory error detector. ==1836== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al. ==1836== Using LibVEX rev 1854, a library for dynamic binary translation. ==1836== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP. ==1836== Using valgrind-3.3.1, a dynamic binary instrumentation framework. ==1836== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al. ==1836== For more details, rerun with: -v ==1836== Running 1 test case... *** No errors detected ==1836== Invalid read of size 8 ==1836== at 0x41E41C: __tcf_1 (in RegressionTest) ==1836== by 0x3830632FA4: exit (in /lib64/libc-2.5.so) ==1836== by 0x383061D8BA: (below main) (in /lib64/libc-2.5.so) ==1836== Address 0x4c1ade0 is 40 bytes inside a block of size 48 free'd ==1836== at 0x4A0555C: operator delete(void*) (vg_replace_malloc.c:342) ==1836== by 0x42024C: std::_Rb_tree<unsigned long, std::pair<unsigned long const, boost::unit_test::test_unit*>, std::_Select1st<std::pair<unsigned long const, boost::unit_test::test_unit*> >, std::less<unsigned long>, std::allocator<std::pair<unsigned long const, boost::unit_test::test_unit*> > >::erase(unsigned long const&) (in RegressionTest) ==1836== by 0x417C11: boost::unit_test::test_unit::~test_unit() (in RegressionTest) ==1836== by 0x41E41B: __tcf_1 (in RegressionTest) ==1836== by 0x3830632FA4: exit (in /lib64/libc-2.5.so) ==1836== by 0x383061D8BA: (below main) (in /lib64/libc-2.5.so) ==1836== ==1836== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 5 from 1) ==1836== malloc/free: in use at exit: 0 bytes in 0 blocks. ==1836== malloc/free: 89 allocs, 89 frees, 38,935 bytes allocated. ==1836== For counts of detected errors, rerun with: -v ==1836== All heap blocks were freed -- no leaks are possible. I was not able to figure out what valgrind is really complaining about. The internal map of test units holds two entries. One corresponds to my BOOST_AUTO_TEST_CASE call (id=1), the other one seems to be used internally (id=65536). Both are properly erased in deregister_test_unit() which is called by ~test_unit(). Maybe someone with a little bit more insight into Boost.Test is willing to look at this. Regards, Peter.

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Segmentation fault
by caligulaemperorofrome＠yahoo.com 20 Jun '09

20 Jun '09

Trying to use bundled properties like so. typedef std::string Colour; struct edge_properties { string eName; set< Colour > Colours; }; Then the following works OUTSIDE the vis object. graph_t::edge_descriptor e = *edges(g).first; g[e].Colours.insert("5ty"); g[e].Colours.insert("6"); g[e].Colours.insert("7"); set<Colour> set(g[e].Colours); for(std::set<Colour>::iterator si = set.begin(); si != set.end(); si++) std::cout << *si << " "; But if I try to use edge property.Colours INSIDE the vis object (using maps or not) like so. typedef set< string > Set; for(colour_iter=Colour.begin(); colour_iter != Colour.end(); ++colour_iter) { //Set & set = get(m_eColours_map, e); get(m_eColours_map, e).insert( *colour_iter ); //set.insert( *colour_iter ); //g[e].Colours; //g[e].Colours.insert("Green"); //g[e].Colours.insert(*colour_iter); //g[e].Colours.insert("5"); //g[e].Colours.end(); } It compiles but gives Segmentation fault no matter what I try. Im beginning to think that set< string > will not work inside the vis object. If thats true I'll have to rewrite a major part of my program, but I hope not. Using : BOOST_LIB_VERSION "1_36" Thanks Caligula

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[BGL] IncidenceGraph and out_edges
by Christian Bähnisch 20 Jun '09

20 Jun '09

Hello, I do a repost here because of a silly subject copy and paste error of me, sorry for that! The text of my original message is: I'm trying to implement the IncidenceGraph concept for an non-BGL undirected graph like datastructure. Following the boost documentation the target function used with edges from out_edges(u,g) must give vertices != u. Can somebody please explain me why this requirement is in BGL! I think it can make the adaption very difficult as it requieres to artificially orientate undirected edges for each call to out_edges. Any help would be much appreciated! best regards, Chris

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[Q] serializing Database Null values (design question)
by V S P 20 Jun '09

20 Jun '09

I have my CPP ORM pretty much working (so that I can read data from the database and serialize it with boost serialize) in generic manner. There is an issue however with 'Nulls' that possibly exist in the database. I use underneath OTL c++ db library and it has a 'null indicator' like many db libraries do. So if I see a value where null indicator is set to true, should I serialize it out and if yes -- is there something like 'NaN' for all the different value types defined? or should I skip serializing that specific field? that would I think work (unless I do not foresee something) -- in the sense that the field will not get loaded back by 'unserialize' and therefore will contain the value assigned in its constructor. just wanted to hear opinions on this. thank you -- V S P toreason(a)fastmail.fm -- http://www.fastmail.fm - mmm... Fastmail...

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[Q] reading back serialized Collection of shared_ptr
by V S P 20 Jun '09

20 Jun '09

I made may be a little more headways since my previous question and now have an xml archive that appears to 'denote' the shared pointers (see below) To do this I found and used boost template function specifically for shared pointers -- a data member of myclass inheritin from std::multiset -- TRow is the Value type of the multiset that implements 'serialize' method -- -- struct { template <typename Archive> void serialize (Archive& ar, const unsigned int version)const { for(tThisClassConstIterator it=this->begin(); it!=this->end(); ++it) { boost::serialization::save<Archive,typename TRow>(ar,*it,version); } } tTEST_TB3 now however I do not understand how to 'deserialize this' The basic call to void load_table (tTEST_TB3& t, const char * filename) { // open the archive std::ifstream ifs(filename); assert(ifs.good()); boost::archive::xml_iarchive ia(ifs); ia >> BOOST_SERIALIZATION_NVP(t); } does not even compile, I suspect it is because when this 'serialize' function on tTEST_TB3 is called, now the boost::serialization::save<Archive,typename TRow>(ar,*it,version); is NOT valid, because the ar is of type iarchive, and save function on the shared_ptr is not defined for 'iarchive', only for oarchive. So there is another function in the same boost header file ( #include <boost/serialization/shared_ptr.hpp> ) that defines a 'load' function for the shared ptr However -- what I do not undestand is how to invoke this function it seems like I have to iterate through every entry in the archive and then call load to read it into a shared ptr? That seems to be contrary to all the other mechanism supported by the Serialization library. The basic examples just say that I can take a container and just shift it in (or out) of Archiver -- but that does not work if the container is of shared pointers. That's why I went the route of iterating through every element of the container to serialize, and not do not undestand how to load it back. So I need some help (I can provide the complete example if needed) thank you in advance ---------- <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> <!DOCTYPE boost_serialization> <boost_serialization signature="serialization::archive" version="5"> <t class_id="0" tracking_level="0" version="0"> <px class_id="1" tracking_level="1" version="0" object_id="_0"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_1"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_2"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_3"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_4"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_5"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_6"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_7"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_8"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> <px class_id_reference="1" object_id="_9"> <otrq_prov_id>1245439719</otrq_prov_id> <clnt_dbid>1245439719</clnt_dbid> <mydate>6/19/2009 15:28:39</mydate> <amount>33222112121.212000</amount> </px> </t> </boost_serialization> -- V S P toreason(a)fastmail.fm -- http://www.fastmail.fm - Send your email first class

1 1

importing boost-python module in python on windows
by Seema Jaisinghani 19 Jun '09

19 Jun '09

Hi, I have created an extension boost python module for C++ class, successfully using Visual Studio 2009, and get a shared library(.dll) as output. However I am having trouble importing this module in my python code. I have explicitly tried importing the dll as resource in an Eclipse PyDev project, and also set in windows PATH environment variable, the location for this dll. With the PATH set, I also tried import from the python shell, but no success. Can someone describe what is the process to import boost_python_modules in python on windows. Thanks, Seema

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Re: [Boost-users] [ptr_container] ptr_map and MinGW: "a declaration of assert must be available", even with cassert included
by philipp_muenzel＠web.de 19 Jun '09

19 Jun '09

Hi folks, Sorry for the confusion i've caused. It was a problem in my projects include-path, not with the include-path of gcc itself. I included files from another library i use, and this library contains a file named "assert.h" - why it was named so that it clashes with the system-assert i don't know. I renamed this file and altered it's #define include-guards. Now everything works. Thanks for reading my previous posts, I'm sorry for causing confusion with a problem that isn't boost-related at all. Regards, Philipp ___________________________________________________________________ WEB.DE FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und Telefonanschluss für 17,95 Euro/mtl.! http://produkte.web.de/go/02/

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Re: [Boost-users] [ptr_container] ptr_map and MinGW: "a declaration of assert must be available", even with cassert included
by philipp_muenzel＠web.de 19 Jun '09

19 Jun '09

Thanks very much for the ideas. I looked it up but can't find anything unusual: My include path reads as follows: C:/MinGW/bin/../libexec/gcc/mingw32/3.4.5/cc1.exe -E -quiet -v -iprefix C:\MinGW\bin\../lib/gcc/mingw32/3.4.5/ - ignoring nonexistent directory "C:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../mingw32/include" ignoring nonexistent directory "/mingw/lib/gcc/mingw32/3.4.5/../../../../mingw32/include" #include "..." search starts here: #include <...> search starts here: C:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include C:/MinGW/bin/../lib/gcc/mingw32/3.4.5/include /mingw/lib/gcc/mingw32/3.4.5/../../../../include /mingw/include /mingw/lib/gcc/mingw32/3.4.5/include /mingw/include End of search list. And this is the assert.h: /* * assert.h * This file has no copyright assigned and is placed in the Public Domain. * This file is a part of the mingw-runtime package. * No warranty is given; refer to the file DISCLAIMER within the package. * * Define the assert macro for debug output. * */ /* We should be able to include this file multiple times to allow the assert macro to be enabled/disabled for different parts of code. So don't add a header guard. */ #ifndef RC_INVOKED /* All the headers include this file. */ #include <_mingw.h> #undef assert #ifdef __cplusplus extern "C" { #endif #ifdef NDEBUG /* * If not debugging, assert does nothing. */ #define assert(x) ((void)0) #else /* debugging enabled */ /* * CRTDLL nicely supplies a function which does the actual output and * call to abort. */ _CRTIMP void __cdecl __MINGW_NOTHROW _assert (const char*, const char*, int) __MINGW_ATTRIB_NORETURN; /* * Definition of the assert macro. */ #define assert(e) ((e) ? (void)0 : _assert(#e, __FILE__, __LINE__)) #endif /* NDEBUG */ #ifdef __cplusplus } #endif #endif /* Not RC_INVOKED */ > > Well, the is in scoped_array then. But I looked there too, and it uses > BOOST_ASSERT just fine. If you look into <assert.h> on your system, then > it should contain the assert() macro. Could it be that your include path > is wrong or garbled? > > -Thorsten ______________________________________________________ GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de

1 0

Filesystem: remove arguments
by Dimitri Kaparis 19 Jun '09

19 Jun '09

Hello, from the reference at http://www.boost.org/doc/libs/1_39_0/libs/filesystem/doc/reference.html#Ope…: template <class Path> void remove(const Path& p, system::error_code & ec = singular ); Using the 1.39.0 release, on Windows MSVC9, I get the following error: 'boost::filesystem::remove' : no overloaded function takes 2 arguments Has the second argument been removed? Is there any form of the remove function that does not throw? Thanks, Dimitri

1 0

iostreams lzma filter support
by Olaf Peter 19 Jun '09

19 Jun '09

Hi, are there any plans to support the lzma algorithm by boost.iostreams filter? I've seen some japanese error messages by googling on this, but I did not find it inside the trunk. Is it self written? or any work in progress to make it public here? Thanks, Olaf

1 0

VS 2003 Wierd Linking Problem
by Dan Benčík 19 Jun '09

19 Jun '09

Dear all, I have installed boost according to the guide (http://www.boost.org/doc/libs/1_39_0/more/getting_started/windows.html) and have set the includes and libs directory accordingly (D:\Boost_1_38\lib for libraries and D:\Boost_1_38\ for includes). I try the basic code listed at point 4/ of the guide, but receive the following error: LINK : fatal error LNK1104: cannot open file 'D:\Boost_1_38\lib.obj' It seems, as if the VS put an empty name of an object file, attached it to the libraries directory and appended a .obj suffix. Could anybody help me out with this problem? Thank you, E.

1 0

[boost-users][asio] Connect with ssl to ipod?
by Germán Diago 19 Jun '09

19 Jun '09

Hello. I would like to know if it's possible (or there's any trick) to connect to ipod touch via boost.asio with ssl encryption. Currently I'm using an ssh connection with libssh. That's ok to navigate the directories, but I cannot copy files, since scp asks me for a password and I don't know how to solve this. Any idea? Thanks in advance.

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[JOB OFFER] - Engineer/Post-doctoral Fellow Position at University Paris XI
by Joel Falcou 18 Jun '09

18 Jun '09

While hoping it is not spam. As the job offer ma include large use of boost library, I post this here for anyone that may be interested. Don't hesitate to forward this to whoever you want. Context: The PARALL team at LRI is looking for a qualified post-doctoral researcher or computer science engineer with experience in C++ and GPU Programming to take part in a DIGITEO research project. Activities: After a phase of bibliography and state of the art analysis, the recruited fellow will participate to the design and implementation of a semi-automatic parallelization tools[1] for linear algebra code over NVIDIA GPUs using code generation technique like template meta-programing and/or multi-stage programming in C++. This tool will then be inserted into the NT2 project[2] and will be used to develop X-ray based non-destructive control applications in collaboration with CEA-LIST. Applications should contain resume and motivation letter. Position available starting september or october 2009 Workplace : LRI, Université Paris Sud - Orsay, France Duration : 24 months Salary before taxes : 2 862 euros/month, 34 344euros/year Compétences : - required : C++, CUDA, parallel programming - optional : first experience with Matlab and/or BOOST libraries, meta-programming notions Contact : Joel FALCOU, Assistant professor - E-mail : joel.falcou(a)lri.fr - Téléphone : (+33) 1 69 15 66 35 References : [1] Meta-programming Applied to Automatic SMP Parallelization of Linear Algebra Code - J. Falcou, J. Serot, L. Pech, J-T. Lapreste in Proceedings of EuroPar 208, p. 729-738. http://www.springerlink.com/content/l4r4462r25740127/ <http://www.springerlink.com/content/l4r4462r25740127/> [2] Project NT2 : http://nt2.sourceforge.net

4 4

Linker error on linux...
by Ozgur Ozturk 18 Jun '09

18 Jun '09

Hi, Thanks to Mr Watanabe, it compiled on Windows. Now I am trying to compile on Linux. I was hoping things would be easier because of package managers. The package manager installed headers into /usr/include/boost and libs into /usr/lib/ (found out from YAST) When I try to compile the same example<http://www.boost.org/doc/libs/1_39_0/doc/html/boost_asio/example/chat/chat_…>with (c++ -I /usr/include/ chat_server.cpp -o chat_server) I get errors. I guess I should also specify a library on the command line. But which library I should include? The error messages seems not very helpful. It doesn't print the line number of the error, but things like .text+0xb3: chat_server.cpp:(.text+0xb3): undefined reference to `boost::system::get_system_category()' I grepped in lib folder for a name with system, but none from boost. Hopefully, you can show me some directions, Thanks in advance, Best regards, Ozgur (Oscar) Ozturk www.DrOzgur.com +1 (614) 805-4370

2 1

[boost.python] Unable to compile tutorial example
by TheLonelyStar 18 Jun '09

18 Jun '09

Hi, I am under Linux, ubunut 8.04 LTS and have no admin rights. Here boost 1.34 ist installed. This is my user-conifg.jam: #gcc config using gcc : gcc : /usr/bin/gcc ; # Python configuration using python : 2.5 : /usr ; I am trying to get the tutorial example compiled, as described here: http://www.boost.org/doc/libs/1_39_0/libs/python/doc/tutorial/doc/html/pyth… But I get this: bjam /export/home/nhuesken/boost.python/boost_1_34_0/Jamfile.v2:341: in load-aux rule path.glob-tree unknown in module Jamfile</export/home/nhuesken/boost.python/boost_1_34_0>. /usr/share/boost-build/build/project.jam:318: in load-jamfile /usr/share/boost-build/build/project.jam:68: in project.load /usr/share/boost-build/build/project.jam:725: in project.use /usr/share/boost-build/build/project.jam:94: in load-used-projects /usr/share/boost-build/build/project.jam:79: in load /usr/share/boost-build/build/project.jam:170: in project.find /usr/share/boost-build/build-system.jam:148: in load /usr/share/boost-build/kernel/modules.jam:261: in import /usr/share/boost-build/kernel/bootstrap.jam:132: in boost-build /net/gorgonzola/storage/nhuesken/boost.python/boost_1_34_0/libs/python/example/boost-build.jam:7: in module scope I have no Idea what this means. Thank you for any help! Nathan -- View this message in context: http://www.nabble.com/-boost.python--Unable-to-compile-tutorial-example-tp2… Sent from the Boost - Users mailing list archive at Nabble.com.

3 3

[docs] Meaning of right/left arrows
by Robert Jones 18 Jun '09

18 Jun '09

A few libraries (eg. fusion) have sufficiently complicated (and thorough) documentation that they have sections, sub-sections, and maybe sub-sub-sections. In that case I instinctively expect that the arrow right at the top right of the page will take me to the next sections, or sub-sections (ie the next peer of the page I'm looking at), whereas in fact it always takes me to the next page. Does anyone else consider this is not quite right, and is it worth changing it? - Rob.

2 1

Re: [Boost-users] [ptr_container] ptr_map and MinGW: "a declaration of assert must be available", even with cassert included
by philipp_muenzel＠web.de 18 Jun '09

18 Jun '09

Hi, the error originates from various headers that ptr_map includes. This is the whole output from gcc, perhaps it helps: g++ -c -g -Wall -fno-exceptions -fno-rtti -I"c:\boost_1_39_0" - I"." -o release\datacontainer.o datacontainer. cpp In file included from c:/boost_1_39_0/boost/scoped_array.hpp:14, from c:/boost_1_39_0/boost/ptr_container/detail/scoped_deleter. hpp:21, from c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_ container.hpp:21, from c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr _container.hpp:20, from c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:20 , from c:/boost_1_39_0/boost/ptr_container/ptr_map.hpp:20, from datacontainer.h:29, from datacontainer.cpp:21: c:/boost_1_39_0/boost/smart_ptr/scoped_array.hpp: In member function `T& boost:: scoped_array<T>::operator[](ptrdiff_t) const': c:/boost_1_39_0/boost/smart_ptr/scoped_array.hpp:80: error: there are no argumen ts to `assert' that depend on a template parameter, so a declaration of `assert' must be available c:/boost_1_39_0/boost/smart_ptr/scoped_array.hpp:80: error: (if you use `-fpermi ssive', G++ will accept your code, but allowing the use of an undeclared name is deprecated) In file included from c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_ container.hpp:21, from c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr _container.hpp:20, from c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:20 , from c:/boost_1_39_0/boost/ptr_container/ptr_map.hpp:20, from datacontainer.h:29, from datacontainer.cpp:21: c:/boost_1_39_0/boost/ptr_container/detail/scoped_deleter.hpp: In constructor `b oost::ptr_container_detail::scoped_deleter<T, CloneAllocator>::scoped_deleter(si ze_t)': c:/boost_1_39_0/boost/ptr_container/detail/scoped_deleter.hpp:47: error: there a re no arguments to `assert' that depend on a template parameter, so a declaratio n of `assert' must be available c:/boost_1_39_0/boost/ptr_container/detail/scoped_deleter.hpp: In constructor `b oost::ptr_container_detail::scoped_deleter<T, CloneAllocator>::scoped_deleter(si ze_t, const T&)': c:/boost_1_39_0/boost/ptr_container/detail/scoped_deleter.hpp:58: error: there a re no arguments to `assert' that depend on a template parameter, so a declaratio n of `assert' must be available c:/boost_1_39_0/boost/ptr_container/detail/scoped_deleter.hpp: In constructor `b oost::ptr_container_detail::scoped_deleter<T, CloneAllocator>::scoped_deleter(In putIterator, InputIterator)': c:/boost_1_39_0/boost/ptr_container/detail/scoped_deleter.hpp:71: error: there a re no arguments to `assert' that depend on a template parameter, so a declaratio n of `assert' must be available In file included from c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_ container.hpp:24, from c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr _container.hpp:20, from c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:20 , from c:/boost_1_39_0/boost/ptr_container/ptr_map.hpp:20, from datacontainer.h:29, from datacontainer.cpp:21: c:/boost_1_39_0/boost/ptr_container/clone_allocator.hpp: In function `T* boost:: new_clone(const T&)': c:/boost_1_39_0/boost/ptr_container/clone_allocator.hpp:35: error: cannot use ty peid with -fno-rtti c:/boost_1_39_0/boost/ptr_container/clone_allocator.hpp:35: error: cannot use ty peid with -fno-rtti c:/boost_1_39_0/boost/ptr_container/clone_allocator.hpp:35: error: there are no arguments to `assert' that depend on a template parameter, so a declaration of ` assert' must be available In file included from c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr _container.hpp:20, from c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:20 , from c:/boost_1_39_0/boost/ptr_container/ptr_map.hpp:20, from datacontainer.h:29, from datacontainer.cpp:21: c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_container.hpp: In stat ic member function `static typename Config::value_type* boost::ptr_container_det ail::reversible_ptr_container<Config, CloneAllocator>::null_clone_allocator<allo w_null_values>::allocate_clone(const typename Config::value_type*)': c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_container.hpp:111: err or: cannot use typeid with -fno-rtti c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_container.hpp:111: err or: cannot use typeid with -fno-rtti c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_container.hpp:111: err or: there are no arguments to `assert' that depend on a template parameter, so a declaration of `assert' must be available In file included from c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:20 , from c:/boost_1_39_0/boost/ptr_container/ptr_map.hpp:20, from datacontainer.h:29, from datacontainer.cpp:21: c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp: In mem ber function `void boost::ptr_container_detail::associative_ptr_container<Config , CloneAllocator>::multi_transfer(typename AssociatePtrCont::iterator, Associate PtrCont&)': c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp:196: er ror: there are no arguments to `assert' that depend on a template parameter, so a declaration of `assert' must be available c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp: In mem ber function `typename boost::ptr_container_detail::reversible_ptr_container<Con fig, CloneAllocator>::size_type boost::ptr_container_detail::associative_ptr_con tainer<Config, CloneAllocator>::multi_transfer(typename AssociatePtrCont::iterat or, typename AssociatePtrCont::iterator, AssociatePtrCont&)': c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp:208: er ror: there are no arguments to `assert' that depend on a template parameter, so a declaration of `assert' must be available c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp: In mem ber function `bool boost::ptr_container_detail::associative_ptr_container<Config , CloneAllocator>::single_transfer(typename AssociatePtrCont::iterator, Associat ePtrCont&)': c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp:229: er ror: there are no arguments to `assert' that depend on a template parameter, so a declaration of `assert' must be available c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp: In mem ber function `typename boost::ptr_container_detail::reversible_ptr_container<Con fig, CloneAllocator>::size_type boost::ptr_container_detail::associative_ptr_con tainer<Config, CloneAllocator>::single_transfer(typename AssociatePtrCont::itera tor, typename AssociatePtrCont::iterator, AssociatePtrCont&)': c:/boost_1_39_0/boost/ptr_container/detail/associative_ptr_container.hpp:245: er ror: there are no arguments to `assert' that depend on a template parameter, so a declaration of `assert' must be available In file included from c:/boost_1_39_0/boost/ptr_container/ptr_map.hpp:20, from datacontainer.h:29, from datacontainer.cpp:21: c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp: In member function `typ ename boost::ptr_container_detail::associative_ptr_container<boost::ptr_containe r_detail::map_config<T, VoidPtrMap, Ordered>, CloneAllocator>::const_reference b oost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator, Ordered>::lookup(const typename boost::ptr_container_detail::associative_ptr_con tainer<boost::ptr_container_detail::map_config<T, VoidPtrMap, Ordered>, CloneAll ocator>::key_type&) const': c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:176: error: there are no arguments to `assert' that depend on a template parameter, so a declaration of `assert' must be available datacontainer.cpp: In member function `bool DataContainer::addRequestedData(uint 32_t, const std::string&)': datacontainer.cpp:91: warning: comparison between signed and unsigned integer ex pressions c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_container.hpp: In stat ic member function `static void boost::ptr_container_detail::reversible_ptr_cont ainer<Config, CloneAllocator>::enforce_null_policy(const typename Config::value_ type*, const char*) [with Config = boost::ptr_container_detail::map_config<ICanD ataToSend, std::map<uint32_t, void*, std::less<uint32_t>, std::allocator<std::pa ir<const uint32_t, void*> > >, true>, CloneAllocator = boost::heap_clone_alloca tor]': c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:524: instantiated from `std::pair<typename boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPt rMap, CloneAllocator, Ordered>::iterator, bool> boost::ptr_map_adapter<T, VoidPt rMap, CloneAllocator, Ordered>::insert_impl(const typename boost::ptr_container_ detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator, Ordered>::key_type&, typename boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, Clone Allocator, Ordered>::mapped_type) [with T = ICanDataToSend, VoidPtrMap = std::ma p<uint32_t, void*, std::less<uint32_t>, std::allocator<std::pair<const uint32_t, void*> > >, CloneAllocator = boost::heap_clone_allocator, bool Ordered = true] ' c:/boost_1_39_0/boost/ptr_container/ptr_map_adapter.hpp:550: instantiated from `std::pair<typename boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPt rMap, CloneAllocator, Ordered>::iterator, bool> boost::ptr_map_adapter<T, VoidPt rMap, CloneAllocator, Ordered>::insert(typename boost::ptr_container_detail::ptr _map_adapter_base<T, VoidPtrMap, CloneAllocator, Ordered>::key_type&, typename b oost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator, Ordered>::mapped_type) [with T = ICanDataToSend, VoidPtrMap = std::map<uint32_t, void*, std::less<uint32_t>, std::allocator<std::pair<const uint32_t, void*> > > , CloneAllocator = boost::heap_clone_allocator, bool Ordered = true]' datacontainer.cpp:124: instantiated from here c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_container.hpp:264: err or: `assert' was not declared in this scope c:/boost_1_39_0/boost/ptr_container/detail/reversible_ptr_container.hpp:264: war ning: unused variable 'assert' mingw32-make[1]: *** [release/datacontainer.o] Error 1 > -----Ursprüngliche Nachricht----- > philipp_muenzel(a)web.de skrev: > > Hello, > > > > I'm using boost::ptr_map successfully on Linux, compiling with gcc 4.3.2. > > However, now i tried the same code on Windows XP, using MinGW with gcc 3.4.5 i get the following error: > > "error: there are no arguments to 'assert' that depend on a template parameter, so a declaration of 'assert' must be available". > > > > I had exactly the same error on Linux, there i put a #include <cassert> before the #include to boost::ptr_map and everything worked. > > But on windows, i tried #include <cassert> and #include <assert.h>, also a > > #include <cassert> > > #ifndef assert > > #define assert assert > > #endif > > in case something was messing with the name. > > I tried version 1.39 and 1.37 on windows and the result is the same. > > > > I also carefully inspected the headers i also include, suspecting some might #define an include-guard that confuses with assert. > > > > No luck yet and I'm out of ideas now. > > > > Any ideas are greatly appreciated. > > Hm. I have no idea, actually. I tried to grep for assert in the source > without any luck :-( > > Are the ptr container headers the only headers that you include? > > -Thorsten > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > ___________________________________________________________________ WEB.DE FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und Telefonanschluss für 17,95 Euro/mtl.! http://produkte.web.de/go/02/

2 1

[ptr_container] ptr_map and MinGW: "a declaration of assert must be available", even with cassert included
by philipp_muenzel＠web.de 18 Jun '09

18 Jun '09

Hello, I'm using boost::ptr_map successfully on Linux, compiling with gcc 4.3.2. However, now i tried the same code on Windows XP, using MinGW with gcc 3.4.5 i get the following error: "error: there are no arguments to 'assert' that depend on a template parameter, so a declaration of 'assert' must be available". I had exactly the same error on Linux, there i put a #include <cassert> before the #include to boost::ptr_map and everything worked. But on windows, i tried #include <cassert> and #include <assert.h>, also a #include <cassert> #ifndef assert #define assert assert #endif in case something was messing with the name. I tried version 1.39 and 1.37 on windows and the result is the same. I also carefully inspected the headers i also include, suspecting some might #define an include-guard that confuses with assert. No luck yet and I'm out of ideas now. Any ideas are greatly appreciated. Regards, Philipp ____________________________________________________________ Text: GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de

2 1

Boost: Regex - XML
by Etienne Philip Pretorius 18 Jun '09

18 Jun '09

Just a general question, Could one use Boost.Regex to build a Well-Formed and Validating XML parser whose view is iterators to elements inside the XML document? In other words, create a class that acts like an XML parser so that you may derive from it to say create a XMPP class? Etienne

2 1

BOOST_FOREACH question
by Zachary Turner 18 Jun '09

18 Jun '09

Suppose I've got a concrete instance C of some class, and a pair of iterators X and Y representing a range [X, Y). I want to do the following: int a, b, c; while (X != Y) { C.foo(*X, a, b, c); ++X; } I can type it out like that, but actually X and Y are zip_iterators, and it's hard for me to figure out how to parameterize the zip_iterator to instantiate it. I tried the following: class EncoderService { boost::asio::io_service work_io_service_; void async_encode(std::vector<const_buffer> inputs, std::vector<mutable_buffer> outputs) { BOOST_ASSERT(s.size() == t.size()); std::for_each( boost::make_zip_iterator(boost::make_tuple(inputs.begin(), outputs.begin())), boost::make_zip_iterator(boost::make_tuple(inputs.end(), outputs.end())), boost::bind( &boost::asio::io_service::post, &work_io_service_, boost::bind( &EncoderService::encode_handler, this))); } void encode_handler(const boost::tuple<const_buffer, mutable_buffer>& buffers) { } }; If I do this I get tons of errors. I'm probably just doing something stupid. Even still the for_each is already complicated and kind of hard to read, I feel like there should be a one or two-liner to do this :( the io_service::post() function simply calls encode_handler() on another thread. I'm thinking it might just be easier to walk each sequence manually, but at some point I was hoping to templatize the async_encode() function rather than have it take vectors.

3 2

[Q] help serializing a multiset of shared ptrs
by V S P 17 Jun '09

17 Jun '09

Hello, I am sure I am not doing things quite right in serializing my multiset, however I could not 'connect the dots' in the serialize documentation between serializing shared pointers and containers. Therefore, asking for help. I created a complete compilable example, that I am attaching below and the created output file. The program crashes on the last line when I am trying to load the data back in. Any help is greatly appreciated, Vlad -------------- prog start ---------------- #include <iostream> #include <fstream> #include <ostream> #include <ctime> #include <cstdlib> #include <set> #include <algorithm> #include <boost/archive/tmpdir.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/utility.hpp> #include <boost/serialization/list.hpp> #include <boost/serialization/assume_abstract.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/nvp.hpp> #include <boost/archive/tmpdir.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/lexical_cast.hpp> using namespace std; using namespace boost; template <typename TRow, typename TContainer=std::multiset< shared_ptr<TRow> > > struct cactivetable_t: public TContainer, private boost::noncopyable { template <typename Archive> void serialize (Archive& ar, const unsigned int version) { for (TContainer::const_iterator it=begin(); it!=end();it++) { (*it)->myserialize(ar,version); } } }; struct tRow { int a; string b; template <typename Archive> void myserialize (Archive& ar, const unsigned int version) { ar&boost::serialization::make_nvp("a", a); ar&boost::serialization::make_nvp("b", b); } }; struct randrow { shared_ptr<tRow> operator()(void) { shared_ptr<tRow> p(new tRow); p->a=rand()%100; p->b=lexical_cast<string>(p->a); return p; } }; void main (void) { cactivetable_t<tRow> mytb; shared_ptr<tRow> tmpP(new tRow); for (size_t i=0;i<10;i++) { /*note for multiset we can insert the same thing many times */ mytb.insert(tmpP); } randrow rw; generate(mytb.begin(),mytb.end(),rw); // make an archive { ofstream ofs("xyz.sxml"); assert(ofs.good()); boost::archive::xml_oarchive oa(ofs); oa<<BOOST_SERIALIZATION_NVP(mytb); }//scope to close file cout<<"finished serializing, now lets try to read back"<<endl; mytb.clear(); { // open the archive std::ifstream ifs("xyz.sxml"); assert(ifs.good()); boost::archive::xml_iarchive ia(ifs); // restore the schedule from the archive ia >> BOOST_SERIALIZATION_NVP(mytb); } cout<<"after restore tb size is: "<<mytb.size()<<endl; } -------------- prog end ------------------- -- archive xyz.sxml XML start ---- <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> <!DOCTYPE boost_serialization> <boost_serialization signature="serialization::archive" version="5"> <mytb class_id="0" tracking_level="0" version="0"> <a>41</a> 41 <a>67</a> 67 <a>34</a> 34 <a>0</a> 0 <a>69</a> 69 <a>24</a> 24 <a>78</a> 78 <a>58</a> 58 <a>62</a> 62 <a>64</a> 64 </mytb> </boost_serialization> --- archive XML end ---- -- V S P toreason(a)fastmail.fm -- http://www.fastmail.fm - Access all of your messages and folders wherever you are

1 1

asio: serial ports and timeouts
by KessiMC 17 Jun '09

17 Jun '09

Hi again I was playing around with asio a bit, creating the following class: AsioPlayground::AsioPlayground() : maxCharDelay(seconds(10)), charTimeout(io, maxCharDelay), port(io, "COM2") { port.set_option(serial_port_base::baud_rate(9600)); port.set_option(serial_port_base::character_size(7)); port.set_option(serial_port_base::flow_control(serial_port_base::flow_control::none)); port.set_option(serial_port_base::parity(serial_port_base::parity::even)); port.set_option(serial_port_base::stop_bits(serial_port_base::stop_bits::one)); } AsioPlayground::~AsioPlayground() { } template<> void AsioPlayground::write<string>(const string &value) { boost::asio::write(port, buffer(value, value.size())); } template<> void AsioPlayground::write<char>(const char &c) { boost::asio::write(port, buffer(&c, 1)); } template<> char AsioPlayground::read<char>() { function<void(const error_code &)> onTimeout = bind(&AsioPlayground::onTimeout, this, _1); charTimeout.async_wait(onTimeout); function<void(const error_code &, size_t)> onSuccess = bind(&AsioPlayground::onSuccess, this, _1, _2); char input = '\0'; async_read(port, buffer(&input, 1), onSuccess); error_code ec; io.run(ec); return input; } string AsioPlayground::read(int numberOfCharacters) { string input; for (int i = 0; i < numberOfCharacters; ++i) { input.push_back(read<char> ()); } return input; } void AsioPlayground::onSuccess(const error_code &ec, size_t size) { charTimeout.cancel(); } void AsioPlayground::onTimeout(const error_code &ec) { if (ec != error::operation_aborted) { throw InterfaceTimeoutException("No response"); } } int AsioPlayground::main(const vector<string> &args) { AsioPlayground play; play.write<string> ("/?12345678!\r\n"); try { cout << "Reply: " << play.read(10) << endl; } catch (const InterfaceTimeoutException &ex) { cout << ex.what() << endl; } return 0; } Executing the main function should have an expected behaviour of writing the string to the other party, and reading at least 10 characters or failing with a timeout exception. The timeout is meant to work as a character delay, allowing a maximum of 10 seconds between each transmitted character before failing. The writing part works A-ok. The reading throws the expected exception if no characters are transmitted by the oppositing device. However, if I transmit 9 characters from the device, these characters are displayed, appended by a '\0' character (or whichever character I choose as default in read<char>()). io.run() seems to return immediately, not even waiting for any characters to be transmitted. Adding completion_conditions to async_read(), like transfer_all() or transfer_at_least(1) did not do the trick, either. What is going wrong here? Thanks for any suggestions and greeetz Pascal -- View this message in context: http://www.nabble.com/asio%3A-serial-ports-and-timeouts-tp24073127p24073127… Sent from the Boost - Users mailing list archive at Nabble.com.

2 4

Boost Trac/Subversion upgrade this Friday
by Doug Gregor 17 Jun '09

17 Jun '09

The Boost Trac and Subversion repository will be offline for a few hours this Friday, June 19th, while we upgrade to a new version of Trac. Mailing lists will not be affected. Here is the approximate down-time: Date: Friday June 19, 2009 Time: - 11:00am-2:00pm Pacific US time - 12:00pm-3:00pm Mountain US time - 1:00pm-4:00pm Central US time - 2:00pm-5:00am Eastern US time - 6:00pm-9:00pm GMT Cheers, - Doug

1 0

Re: [Boost-users] [iostreams] filtering_istream not working as intended..
by mmocny 17 Jun '09

17 Jun '09

Hello all, I am running into some odd "quirks" of the filtering_istream in the boost::iostreams library. Perhaps I am just using it wrong, but all code compiles, and does _almost_ what I would expect it to. Example Code: #include <boost/iostreams/tee.hpp> #include <boost/iostreams/invert.hpp> #include <boost/iostreams/device/file.hpp> #include <boost/iostreams/filtering_stream.hpp> #include <iostream> int main() { boost::iostreams::file log_file("sample.txt", std::ios::trunc); boost::iostreams::filtering_istream in; in.push( boost::iostreams::invert(boost::iostreams::tee(log_file)) ) /* this part is optional */ in.push( std::cin ); std::string s; int i; /* step 1 */ getline(std::cin,s); /* note: std::cin as istream passed to getline */ std::cin >> i; std::cin.ignore( std::numeric_limits<std::streamsize>::max(), '\n' ); std::cout << s << std::endl <> i; std::cin.ignore( std::numeric_limits<std::streamsize>::max(), '\n' ); std::cout << s << std::endl << i << std::endl; /* I would expect step 1 and step 2 to behave exactly the same (except for the loggin) */ } As documented, I would expect the two input blocks to exhibit the exact same behavior. Unfortunately, on my platform anyway ( gcc 4.3.3 on 64 bit linux ) - and verified by another user ( also on linux 64 bit, gcc 4.4 ) - that the two code blocks not only differ, but differ in odd ways. The filtering_istream blocks on input, and will not resume until *4* EOF characters are sent. If I remove the invert(tee(log_file)) only *2* EOF need to be sent. First off, I do not know why it is blocking (perhaps this is expected from a filtering_istream which expects to read the entire stream to EOF). I have not found this documented anywhere. Either way, the fact that multiple EOF's need to be sent, and the fact that that number differs depending on the pipeline, leads me to think there is either a bug or I am not using something as intended. Thanks for any help! -Michal p.s. My requirements are only to create an istream which sends what is read from standard input to a log file, while still having the input available for processing by the application. Maybe can suggest another way to solve the problem?

2 1

using Boost.Interprocess with different compilers
by Dominik Holler 17 Jun '09

17 Jun '09

Hi, is it possible to communicate between multiple programs using Boost.Interprocess, if the programs are compiled with different compilers e.g. MSVS 7.1 and MinGw gcc 3.4.5 ? regards Dominik Holler

2 1

[variant] Efficiency
by Olivier Tournaire 17 Jun '09

17 Jun '09

Hi all, I need to store in a class an object which type is within a predefined set. As I would like to avoid the overhead of virtual functions, I am wondering if variant could help me. Moreover, I would like to know what is the runtime cost of using such a type (instead of base class pointers), and the cost of the apply_visitor. Hope you could help. Regards, Olivier

5 6

boost::serialization and PHP websites
by KessiMC 17 Jun '09

17 Jun '09

Hi everyone Currently, I'm using boost serialization for some of my configuration files (XML format). Some time ago, it became necessary to edit these files using a web interface in PHP. As I could not think of a suitable method to deserialize such an XML file to PHP (with all object references, etc.), I wrote a C++ program generating HTML code, allowing some simple configuration tasks. Even though this worked as a quick and dirty solution, I do not intend to support such a proprietary workaround for too long. Much more comfortable would it be to deserialize the XML file to PHP classes or, with JSP or ASP.NET websites, Java and C# classes. Does anyone of you know of such libraries for crossing the website/C++ line? Or should I use another serialization library? Currently, I consider the boost serialization a de-facto standard for C++ serialization issues. Thanks for any reply and best regards Pascal Kesseli -- View this message in context: http://www.nabble.com/boost%3A%3Aserialization-and-PHP-websites-tp23770268p… Sent from the Boost - Users mailing list archive at Nabble.com.

3 4

[pool] Crash when attempting to call malloc (1.32)
by James Madison 17 Jun '09

17 Jun '09

I am experiencing a very rare crash with boost::pool, when attempting to call malloc(), using boost 1.32. Specifically: In the header: boost::object_pool<unsigned long long> m_cdPool; In the code in Thread 1: unsigned long long key* = m_cdPool.malloc(); In the code in Thread 2: random_structure->memoryPool->free(...); I am crashing on a call to simple_segregated_storage<unsigned int>::malloc() within boost, specifically in the following method, where at the end of the method ret contains an inaccessable memory address. // pre: !empty() void * malloc() { void * const ret = first; // Increment the "first" pointer to point to the next chunk first = nextof(first); return ret; } I am wondering if anyone has experienced anything similar, and knows what might be happening. Also, about threads. This is being malloced/free in two separate threads, however I sort of assumed that pool was thread safe because of discussion about using boost::thread instead of their current scheme for thread safety on another mailing list. Was my assumption wrong, i.e. pool is not thread safe? (I am a little hesitant to blame this completely on threading without searching a bit elsewhere because of the way the three threads operate, there is very little chance they are stomping over the pool, and the other threads are also all in wait states when this occurs)

3 2

pool allocator based on element type instead of size?
by Kenny Riddile 17 Jun '09

17 Jun '09

I've found myself wanting something similar to boost::fast_pool_allocator, but with the following syntax for releasing memory: using namespace boost; std::list< T, fast_pool_allocator<T> > myList; // Note that second template parameter is T, not sizeof(T). // Basically I guess I just want a pool per type, even if // two types have the same size. singleton_pool< fast_pool_allocator_tag, T >::release_memory(); Is there a reason why this isn't doable that I should know about before I try to implement it? Has something similar already been done (even if it's from outside the Boost community) so I don't reinvent the wheel? Thanks, Kenny Riddile

1 0

[Q] boost::spirit BOOST_FUSION_ADAPT_STRUCT error
by V S P 17 Jun '09

17 Jun '09

Hello, I am attempting to parse FuncName(arg1,arg2,... argN) with Spirit, such that args are saved in a vector and func name is saved into a funct_nm I am just in the beginning of this (I have not learned yet how to construct a grammar that allows comma delimited args within braces ) But running into a compilation error on line (std::string, funct_nm) within BOOST_FUSION_ADAPT_STRUCT I am using mini_xml1.cpp as an example Would like to ask for help/pointers to resolve it. I want to mention that my project on boost 1.38 and also includes json_spirit which uses ( I am guessing the 'classic version' of spirit). thank you in advance, Vlad --------------------------------------- #include <json_spirit.h> /* boost spirit parser specifics START */ #include <boost/config/warning_disable.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/phoenix_core.hpp> #include <boost/spirit/include/phoenix_container.hpp> #include <boost/spirit/include/phoenix_statement.hpp> #include <boost/spirit/include/phoenix_object.hpp> #include <boost/spirit/include/phoenix_operator.hpp> #include <iostream> #include <string> #include <complex> /* boost spirit parser specifics end */ using namespace std; using namespace boost::spirit; using namespace boost::spirit::qi; using namespace boost::spirit::ascii; using namespace boost::spirit::arg_names; namespace fusion = boost::fusion; namespace phoenix = boost::phoenix; //VP do not use this namespace,it is clashes with //regular boost //using namespace boost::spirit::arg_names; /* using phoenix::at_c; using boost::phoenix::ref; using boost::phoenix::push_back; using boost::phoenix::val; using boost::phoenix::construct; */ using namespace json_spirit; struct cmdfunct_2arg; //an argument of a function typedef boost::variant< boost::recursive_wrapper<cmdfunct_2arg> , std::string > t_cmd_arg; //function with name and a list of arguments struct cmdfunct_arg { std::string funct_nm; std::vector<t_cmd_arg> args; }; // We need to tell fusion about cmdfunct struct // to make it a first-class fusion citizen //[tutorial_xml1_adapt_structures BOOST_FUSION_ADAPT_STRUCT( cmdfunct_arg, (std::string, funct_nm) (std::vector<t_cmd_arg>, args) ) -- V S P toreason(a)fastmail.fm -- http://www.fastmail.fm - Does exactly what it says on the tin

3 3

Visual studio 2008 problem with linker or compiler (depending on release or debug version)...
by Ozgur Ozturk 16 Jun '09

16 Jun '09

Hi, I have installed boost libraries and headers using the installer from: http://www.boostpro.com/download Then in visual studio I create an empty c++ project and added the chat_server.cpp and chat_message.hpp code from http://www.boost.org/doc/libs/1_39_0/doc/html/boost_asio/examples.html (I wish there was a code download link by the way, I struggled some because of some characters introduced in copy paste) Then I added "C:\Program Files\boost\boost_1_38" to include directories and "C:\Program Files\boost\boost_1_38\lib" to additional library directories (similar to description in the last two sections of this tutorial: http://blog.emptycrate.com/node/421 , but without property sheets, only on project properties.) Now the errors. If I try to build a release version it says: .\chat_server.cpp(17) : fatal error C1083: Cannot open include file: 'boost/bind.hpp': No such file or directory but If I try to build a debug version it says: LINK : fatal error LNK1104: cannot open file 'libboost_system-vc90-mt-gd-1_38.lib' I have a 'libboost_system-vc90-mt-*s*gd-1_38.lib' not 'libboost_system-vc90-mt-gd-1_38.lib' in my lib folder... Thanks in advance, Ozgur (Oscar) Ozturk www.DrOzgur.com +1 (614) 805-4370

2 1

Problem with boost::bind usage
by Zachary Turner 16 Jun '09

16 Jun '09

Is there a technical limitation preventing this from working? int __stdcall VirtualUnlock(void*, size_t); void f() { std::list<void*> locked_buffers; size_t size; std::for_each(locked_buffers.begin(), locked_buffers.end(), boost::bind(VirtualUnlock, boost::lambda::_1, size)); } Irrelevant code snipped for brevity. I get the error It complains about how it can't find F::result_type in bind_template.hpp line 15, with F = int (__stdcall*)(void*, size_t) If I change it to int __stdcall VirtualUnlock(void*, size_t); void f() { std::list<void*> locked_buffers; size_t size; std::for_each(locked_buffers.begin(), locked_buffers.end(), boost::bind(boost::function<int(void*,size_t)>(VirtualUnlock), boost::lambda::_1, size)); } it works, but this is much uglier and I'd rather avoid it.

2 1

lambda::throw_exception fails
by KessiMC 16 Jun '09

16 Jun '09

Hi everyone Be it that this code is working: try { throw InterfaceTimeoutException(); } catch (const std::exception &ex) { cout << ex.what() << endl; } However, trying this: try { lambda::throw_exception(constructor<InterfaceTimeoutException> ())(); } catch (const std::exception &ex) { cout << ex.what() << endl; } ends up with my programm crashing (Exit code 3). What am I missing here? Thanks for any reply and best regards Pascal -- View this message in context: http://www.nabble.com/lambda%3A%3Athrow_exception-fails-tp24063172p24063172… Sent from the Boost - Users mailing list archive at Nabble.com.

2 1

Problem using boost::asio::ip::address::from_string
by Matheus Araújo Aguiar 16 Jun '09

16 Jun '09

Hello boost-users, I'm using boost::asio::ip::address in a client-server application and i'm having a strange behaviour when using the member method *from_string*. The method isn't working correctly(or doing any work at all), since after calling it, nothing changes. Bellow there's a code that reproduces the problem. #include <boost/asio.hpp> #include <iostream> int main() { char ip[15]; printf("type ip please\n"); std::cin >> ip; boost::asio::ip::address a; printf("address1 before member method is called %s\n", a.to_string().data()); a.from_string(ip); boost::asio::ip::address b(a); printf("address1 %s from string %s\n", a.to_string().data(), ip); printf("address2 %s from address1 %s\n", b.to_string().data(), a.to_string().data()); return 0; } Can anyone see what is possibly wrong with the code? Thanx in advance! -- Matheus Araújo Aguiar Computer Scientist matheus.pit(a)gmail.com

2 2

Memory manager/allocator
by Daniele Barzotti 16 Jun '09

16 Jun '09

Hi, I'm sorry if the question goes in OT. I'm searching for a simple cross platform memory manager/allocator library/class to simply allocate/read/write blocks of memory. I googled around and I found some projects: http://code.google.com/p/stdext/ http://memory-mgr.sourceforge.net/ there is also boost.interprocess but I don't need its complexity. I'd like to know if there is a well-known and used one. Thanks in advance. Daniele.

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[BGL] List of edges as property type
by caligulaemperorofrome＠yahoo.com 16 Jun '09

16 Jun '09

I'm trying to add a "list of edges" as an edge property type like so. typedef adjacency_list < listS, vecS, directedS > Traits; typedef adjacency_list < listS, vecS, directedS, vertex_properties, property < edge_list_t, std::list<Traits::edge_descriptor>, edge_properties > > > graph_t; But the compiler says : error: ‘edge_list_t’ was not declared in this scope So I think I need to add edge_list_t to the set of property tags. I think there is a method like BOOST_INSTALL PROPERTY ( edge_list_t ). But I think I read somewhere that thats the old way. Can someone tell me the new way to do it? PS: How can I tell which version of boost I am using? Thanks - Caligula

2 1

[Lambda] Compiler dependent error, can anyone explain?
by Robert Jones 15 Jun '09

15 Jun '09

Hi Peeps I have this cut down code example #include <vector> #include <map> #include <algorithm> #include <boost/shared_ptr.hpp> #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> template < typename Iter, typename Pred > bool any_of_if( Iter first, Iter last, Pred pred ) { return std :: find_if( first, last, pred ) != last; } struct A { }; bool fnOfA( const A & ); typedef std :: vector< boost :: shared_ptr< A > > VecOfPtr; typedef std :: map< int, VecOfPtr > MapOfVecOfPtr; bool contains_if( const VecOfPtr &, bool ( * pred )( const VecOfPtr :: value_type :: value_type &) ); bool f( const boost :: shared_ptr< MapOfVecOfPtr > & myMap ) { using namespace boost; return any_of_if( myMap -> begin( ), myMap -> end( ), lambda :: bind( contains_if, lambda :: bind( & MapOfVecOfPtr :: value_type :: second, lambda :: _1 ), fnOfA ) ); } This compiles under gcc (3.4.4), but under Vis Studio 2008 gives a huge error message, (attached), but summarised as boost\boost/tuple/detail/tuple_basic.hpp(439) : error C2664: 'boost::tuples::detail::non_storeable_type<T>::non_storeable_type(const boost::tuples::detail::non_storeable_type<T> &)' : cannot convert parameter 1 from 'bool (__cdecl &)(const A &)' to 'const boost::tuples::detail::non_storeable_type<T> &' It also goes away if I introduce a temporary local variable for fnOfA. Is this a know bug in VisStudio or Boost, possibly with a known solution? Thanks, - Rob.

2 1

[BGL] destroying a subgraph
by fabricio 15 Jun '09

15 Jun '09

Hi all, I have a vector of subgraphs and at certain situations I have to remove some vertex from one of them. As this is not possible for now, I simply create a temporary subgraph with the vertices I want and replace the old one. The problem is that the memory allocated from the old one is not freed correctly. What should be the correct procedure to do so?? a code snippet: void modgraph::remove_a_vertex(unsigned idx, Vertex vt) { Graph* temp_subg = &g.create_subgraph(); graph_traits < Graph >::vertex_iterator itg, end; for (tie(itg,end) = vertices(*subg(idx)); itg != end; ++itg) { if( (*subg(idx)).local_to_global(*itg) != vt ) { add_vertex(*itg, *temp_subg); } } *subg(idx) = *temp_subg; } where subg is a vector of subgraphs.

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Re: [Boost-users] [mpi] irecv / send problem
by Brian Wood 15 Jun '09

15 Jun '09

Nick Collier writes: > Hmm, I think it should work. Thanks though. The example I posted was > modified from: > http://ci-tutor.ncsa.illinois.edu/content.php?cid=1137 > Namely, > /* deadlock avoided */ > #include <stdio.h> > #include <mpi.h> > void main (int argc, char **argv) { > int myrank; > MPI_Request request; > MPI_Status status; > double a[100], b[100]; > MPI_Init(&argc, &argv); /* Initialize MPI */ > MPI_Comm_rank(MPI_COMM_WORLD, &myrank); /* Get rank */ > if( myrank == 0 ) { > /* Post a receive, send a message, then wait */ > MPI_Irecv( b, 100, MPI_DOUBLE, 1, 19, MPI_COMM_WORLD, &request ); > MPI_Send( a, 100, MPI_DOUBLE, 1, 17, MPI_COMM_WORLD ); > MPI_Wait( &request, &status ); > } > else if( myrank == 1 ) { > /* Post a receive, send a message, then wait */ > MPI_Irecv( b, 100, MPI_DOUBLE, 0, 17, MPI_COMM_WORLD, &request ); > MPI_Send( a, 100, MPI_DOUBLE, 0, 19, MPI_COMM_WORLD ); > MPI_Wait( &request, &status ); > } > MPI_Finalize(); /* Terminate MPI */ > } > I am not sure why MPI was added to Boost. Recently there was an effort to get Boost libs ready for the next C++ standard. I don't think the MPI library was considered in that as it's ties to C are so strong. Having to specify MPI_DOUBLE above when a and b are both declared of type double is sad. Naming it "Message Passing Interface" when you are restricted to messages of a single type is hardly an apt name. If it's going to be in Boost, it may wind up being called the Most Pitiful Interface. -- Brian Wood Ebenezer Enterprises www.webEbenezer.net "The New Deal and Great Society entrenched a welfare mentality in [the US]. The idea of the federal government as the great provider has even moved to the level of corporate America, with business 'leaders' flying to Washington in private jets to beg Congress for handouts to keep their companies afloat." Bill Ragle

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Re: [Boost-users] [ptr_container] Const & non-const ptr_map iteration over mapped values
by Rodolfo Federico Gamarra 15 Jun '09

15 Jun '09

Hi Thorsten, Thanks a lot for your reply. > I would just implement this as (abbreviated) > > template< class R > > struct X > { > template< class Pair > > R operator()( const Pair& p ) const { return *p.second; } > }; umm ... yep, you're right: the T1 and T2 types weren't used in my original alternative. Your struct X needs, tough, the result_type nested typedef (maybe that's why you said "abbreviated"). > Well, why do you want to define that typedef, when it is easier to infer > the type automatically? Yep, it's easier and shorter; but this came so as to to fulfill C++ standard requirements over an "unary function" (as of my understanding). Nevertheless, it seems that (at least in this case) Boost's requirements are weaker, without requiring this other nested typedef. > Why? Dont map::value_type v = *m.find(x) work? Well, yes: at first, this came as a result of the last point: it the arg_type has to be provided (if it has...), then a function template is a no-go alternative. So, an specifically typed function has to be defined: what's the arg_type? The "detail" type shouldn't be used one, and a std::pair didn't work due to the lack of implicit conversion. Then I saw the other nested template typedefs (const_reference and reference). But the question of the to std::pair remainded: does it help with interoperability with code that worked on maps that used the standard std::pair? Is it free to provide it, or there's some impossibility? > Again, why do you want to do this? For the aforementioned reasons, but as you pointed that template parameter wasn't actually needed. Anyway, seemed reasonable to have it provided by ptr_map. Thanks a lot again. Cheers. Rodolfo.

1 0

[lambda] warnings from Lambda
by Robert Jones 15 Jun '09

15 Jun '09

I'm finding that pretty much every lambda :: bind call I make is producing a c4180 warning under Microsoft which I think is warning about the application a meaningless qualifier to the first argument of the bind call. So given, say bool f( int ); lambda::bind( f, lambd::_1 ); inside lambda_traits a const qualifier is applied to f, which is already const, hence the warning. Anyone know how to avoid this, other than #pragma to disable the warning? Thanks, - Rob.

2 3

Copy a smart pointer into allocated memory
by Tiago Alves 15 Jun '09

15 Jun '09

Hi, and sorry for the probable newbieness of this question! I want to put weak_ptr into a piece of memory previously allocated. this is my code: // construct a weak_ptr from a share_ptr boost::weak_ptr<Obj>* cameraPtr = new boost::weak_ptr<Obj>(obj_share_ptr); // lua_newuserdata allocs memory and returns a pointer to it, just like malloc. boost::weak_ptr<Obj>* camera = static_cast<boost::weak_ptr<Obj>*>(lua_newuserdata(pLuaState,sizeof(boost::weak_ptr<Obj>))); Now i want camera to be a weak_ptr of ObjPtr. I tried different ways to do this, such as *camera = boost::weak_ptr<Obj>(obj_share_ptr); or camera->swap(*cameraPtr); or *camera = *cameraPtr; I think none of these work because in fact they all do a swap() between camera and cameraPtr. Since camera is just an malloc, it will try to swap dirty memory and segfault sometimes (yes, sometimes this worked). Out of desperation, i did this: memcpy(camera,cameraPtr,sizeof(boost::weak_ptr<Obj>)); Which seems to work but it stinks. It's copying an object with memcpy instead of using its constructor. Is there a better way to do this? Thanks, Tiago Alves

4 4

[BGL] Searching for index_map
by caligulaemperorofrome＠yahoo.com 15 Jun '09

15 Jun '09

When I run my program the output gives an id to each edge and vertex like so. <edge id="e262" source="n46" target="n43"> This must be the index. So how can I access this index? When I put the following in my code it fails to compile. error: ‘index_map’ was not declared in this scope for (tie(edge_iter, edges_end) = edges(g); edge_iter != edges_end; ++edge_iter) { get(index_map, *edge_iter, g); } Do I need "get_property(index_map) or something? My Graph declaration is as follows. typedef adjacency_list < listS, vecS, directedS >::edge_descriptor edge_t; typedef adjacency_list < listS, vecS, directedS >::vertex_descriptor vertex_t; typedef adjacency_list < listS, vecS, directedS, property< vertex_predecessor_t, vertex_t, vertex_properties >, property< edge_reverse_t, edge_t, edge_properties > > graph_t; Thanks

2 1

[BGL] destroying a subgraph
by "Christian Bähnisch" 15 Jun '09

15 Jun '09

Hello, I'm trying to implement the IncidenceGraph concept for an non-BGL undirected graph like datastructure. Following the boost documentation the target function used with edges from out_edges(u,g) must give vertices != u. Can somebody please explain me why this requirement is in BGL! I think it can make the adaption very difficult as it requieres to artificially orientate undirected edges for each call to out_edges. Any help would be much appreciated! Thanks in advance, Chris -- GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und Telefonanschluss für nur 17,95 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02

2 2

[ptr_container] Const & non-const ptr_map iteration over mapped values.
by Rodolfo Federico Gamarra 15 Jun '09

15 Jun '09

Hi all!! In my class have an internal member of type typedef boost::ptr_map<int, Component> InternalComponentCollection; I'd like to provide const and non-const iterators, through appropriate two pairs of begin / end methods, in order to have "const Component&" and "Component&" as return type in each of the dereferencing operators. What's the way to do that? What I tried: Since the underlying storage relies in "pair" with a pointer, I thought of using a transform iterator to project "second" and then dereference the pointer; something like, for instance, ComponentIterator Begin() { return boost::make_transform_iterator(fComponents.begin(), fResolver); } where fResolver is an instance of template<class T1, class T2, class R> struct SecondResolver { typedef R result_type; template< template <typename,typename> class Pair> result_type operator()(const Pair<T1, const T2>& p) const { return * p.second; } }; and having typedef SecondResolver<KeyType, MappedType, MappedReference> ComponentResolver; typedef typename InternalComponentCollection::key_type KeyType; typedef typename InternalComponentCollection::mapped_type MappedType; typedef typename InternalComponentCollection::mapped_reference MappedReference; typedef typename InternalComponentCollection::iterator PairIterator; typedef boost::transform_iterator<ComponentResolver, PairIterator> ComponentIterator; The case for const iteration is similarly implemented, using the following typedefs: typedef SecondResolver<KeyType, ConstMappedType, ConstMappedReference> ConstComponentResolver; typedef const Component* /* No nested typedef for this...*/ ConstMappedType; typedef typename InternalComponentCollection::const_mapped_reference ConstMappedReference; typedef typename InternalComponentCollection::const_iterato PairConstIterator; typedef boost::transform_iterator<ConstComponentResolver, PairConstIterator> ComponentConstIterator; My remarks about my solution are: 1) SecondResolver is not an "UnaryFunction" in the sense of the C++ standard, since there's no "argument_type" nested typedef. Tough it seems that that isn't actually required by transform_iterator. I have problems in trying to define that typedef (see 2). 2) The actual pairs are instances of boost::ptr_container_detail::ref_pair so it wouldn't be right to typedef that as arg type (it's a "detail"). This class provides implicit conversion from std::pair, but no implicit conversion to std::pair. So that's why I wrote the operator() as a template function, since cannot give the operator an explicit type: nor ref_pair (being a detail), nor std::pair (not having the conversion). Should that conversion be provided? 3) I wrote ConstMappedType typedef explicitly, without relying in a nested typedef in the original class. Doing typedef const MappedType ConstMappedType; doesn't work because the const binds to the pointer, not to the pointed type. Other possibility I looked was to have instead (for the const case, the other one is similar): typedef typename InternalComponentCollection::const_reference ConstReference; typedef SecondResolver2<ConstMappedReference, ConstReference> ConstComponentResolver; template<class RetType, class ArgType> struct SecondResolver2 { typedef RetType result_type; typedef ArgType argument_type; result_type operator()(argument_type p) const { return * p.second; } }; Anyone is better? Thanks a lot in advance. -- Rodolfo Federico Gamarra

2 1

Unresolved symbols
by Robert Dailey 15 Jun '09

15 Jun '09

Hi everyone, I'm using Boost 1.39, and I'm getting the following linker errors on MSVC9: MainWindow.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (__imp_?get_system_category@system @boost@@YAABVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'system_category''(void)" (??__Esystem_category@system@boost@@YAXXZ) OverlayViewModel.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (__imp_?get_system_category@system @boost@@YAABVerror_category@12@XZ) OverlayNode.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (__imp_?get_system_category@system @boost@@YAABVerror_category@12@XZ) MainWindow.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (__imp_?get_generic_category@system@boost@@YAABVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'generic_category''(void)" (??__Egeneric_category@system@boost@@YAXXZ) OverlayViewModel.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (__imp_?get_generic_category@system@boost@@YAABVerror_category@12@XZ) OverlayNode.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (__imp_?get_generic_category@system@boost@@YAABVerror_category@12@XZ) The issues above don't really make any sense. The calling convention, according to the information above, is __cdecl, and in my project settings I'm using cdecl as well. I found several posts about this on the mailing list but no solutions were offered that I could see. How can I resolve these issues? Note that I am using static libraries.

2 2

[bjam] Building Regex with static runtime linking
by Max 15 Jun '09

15 Jun '09

Hello, I want my program to be statically linked to runtime libs, which is using Boost.Regex. I'm using the following command: bjam --toolset=msvc-9.0 --builddir=./ --address-model=32 --link=static --runtime-link=static --threading=multi stage --build-type=complete --with-regex But I get the following error message: error: link=shared together with runtime-link=static is not allowed error: such property combination is either impossible error: or too dangerious to be of any use IMO, the option specified by "--link=static " is overlooked by bjam. What's the problem? Thanks for any information. B/Rgds Max

5 17

[serialization] problems extending existing archive type
by Kenny Riddile 14 Jun '09

14 Jun '09

I recently revisited a problem I was having trouble solving awhile ago, and I'm still having issues. I wish to create a new archive type that is simply an extension of xml_iarchive that takes an additional construction parameter and then be able to retrieve that value from the archive later. This new archive type is part of a static library. See attached Archive.hpp/cpp for my most recent attempt. I should also mention that BOOST_ALL_DYN_LINK is globally defined in my environment. This is the cause of the errors in output1.txt. After looking at archive/detail/decl.hpp, I was able to get my static library to compile by defining BOOST_ARCHIVE_SOURCE while compiling the static library. I then get the linker errors in output2.txt when trying to use the new archive type from an executable. I'm sure I'm just missing something simple, but I need some hand-holding here because I've been at this awhile. Thanks, Kenny Riddile #ifndef RS_REPOSITORY_ARCHIVE_HPP #define RS_REPOSITORY_ARCHIVE_HPP #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <rs/repository/RepositoryFwd.hpp> namespace rs { class InputArchive : public boost::archive::xml_iarchive_impl<InputArchive> , public boost::archive::detail::shared_ptr_helper { public: InputArchive( std::istream& is ); InputArchive( std::istream& is, Repository& repository ); Repository* GetRepository() const; template<class T> void load( T& t ) { boost::archive::xml_iarchive_impl<InputArchive>::load( t ); } private: friend class boost::archive::xml_iarchive_impl<InputArchive>; friend class boost::archive::basic_xml_iarchive<InputArchive>; friend class boost::archive::load_access; Repository* m_repository; }; typedef boost::archive::xml_oarchive OutputArchive; } // end namespace rs #endif // RS_REPOSITORY_ARCHIVE_HPP #include <rs/repository/Archive.hpp> #include <rs/repository/Repository.hpp> namespace rs { InputArchive::InputArchive( std::istream& is ) : boost::archive::xml_iarchive_impl<InputArchive>( is, 0 ) , m_repository( 0 ) { } InputArchive::InputArchive( std::istream& is, Repository& repository ) : boost::archive::xml_iarchive_impl<InputArchive>( is, 0 ) , m_repository( &repository ) { } Repository* InputArchive::GetRepository() const { return m_repository; } } // end namespace rs BOOST_SERIALIZATION_REGISTER_ARCHIVE( rs::InputArchive ) #include <boost/archive/impl/basic_xml_iarchive.ipp> #include <boost/archive/impl/xml_iarchive_impl.ipp> namespace boost { namespace archive { template class basic_xml_iarchive<rs::InputArchive>; template class xml_iarchive_impl<rs::InputArchive>; } // end namespace archive } // end namespace boost #define BOOST_ARCHIVE_CUSTOM_IARCHIVE_TYPES rs::InputArchive 1>------ Build started: Project: repository, Configuration: Debug Win32 ------ 1>Compiling... 1>Archive.cpp 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(41) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::load_start' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(74) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::load_end' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(80) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::load_override' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(86) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::load_override' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(92) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::load_override' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(98) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::load_override' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(105) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::basic_xml_iarchive' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/basic_xml_iarchive.ipp(108) : error C2491: 'boost::archive::basic_xml_iarchive<Archive>::~basic_xml_iarchive' : definition of dllimport function not allowed 1>Warning: This header is deprecated. Please use: boost/spirit/include/classic_rule.hpp 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(83) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::load' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(114) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::load' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(127) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::load' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(140) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::load' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(153) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::load_override' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(160) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::init' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(187) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::xml_iarchive_impl' : definition of dllimport function not allowed 1>C:\Documents and Settings\Administrator\My Documents\Development\development\third_party\boost\1_38_0\boost/archive/impl/xml_iarchive_impl.ipp(200) : error C2491: 'boost::archive::xml_iarchive_impl<Archive>::~xml_iarchive_impl' : definition of dllimport function not allowed 1>BinaryResourceWrapper.cpp 1>ArchiveWrapper.cpp 1>ResourceFileHandle.cpp 1>Repository.cpp 1>BinaryResource.cpp 1>Generating Code... 1>Build log was saved at "file://c:\Documents and Settings\Administrator\My Documents\Development\development\build\components\libs\repository\repository.dir\Debug\BuildLog.htm" 1>repository - 16 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ========== 1>------ Build started: Project: repository_test_repository, Configuration: Debug Win32 ------ 1>Linking... 1>repository.lib(Repository.obj) : error LNK2005: "public: bool __thiscall boost::archive::detail::basic_iserializer::serialized_as_pointer(void)const " (?serialized_as_pointer@basic_iserializer@detail@archive@boost@@QBE_NXZ) already defined in boost_serialization-mt-gd.lib(boost_serialization-mt-gd.dll) 1>repository.lib(Repository.obj) : error LNK2005: "public: bool __thiscall boost::archive::detail::basic_oserializer::serialized_as_pointer(void)const " (?serialized_as_pointer@basic_oserializer@detail@archive@boost@@QBE_NXZ) already defined in boost_serialization-mt-gd.lib(boost_serialization-mt-gd.dll) 1>repository.lib(ArchiveWrapper.obj) : error LNK2005: "public: bool __thiscall boost::archive::detail::basic_iserializer::serialized_as_pointer(void)const " (?serialized_as_pointer@basic_iserializer@detail@archive@boost@@QBE_NXZ) already defined in boost_serialization-mt-gd.lib(boost_serialization-mt-gd.dll) 1>repository.lib(ArchiveWrapper.obj) : error LNK2005: "public: bool __thiscall boost::archive::detail::basic_oserializer::serialized_as_pointer(void)const " (?serialized_as_pointer@basic_oserializer@detail@archive@boost@@QBE_NXZ) already defined in boost_serialization-mt-gd.lib(boost_serialization-mt-gd.dll) 1>repository.lib(Archive.obj) : error LNK2005: "public: bool __thiscall boost::archive::detail::basic_iserializer::serialized_as_pointer(void)const " (?serialized_as_pointer@basic_iserializer@detail@archive@boost@@QBE_NXZ) already defined in boost_serialization-mt-gd.lib(boost_serialization-mt-gd.dll) 1>repository.lib(Archive.obj) : error LNK2005: "public: bool __thiscall boost::archive::detail::basic_oserializer::serialized_as_pointer(void)const " (?serialized_as_pointer@basic_oserializer@detail@archive@boost@@QBE_NXZ) already defined in boost_serialization-mt-gd.lib(boost_serialization-mt-gd.dll) 1> Creating library C:\Documents and Settings\Administrator\My Documents\Development\development\build\bin\Debug\repository_test_repository.lib and object C:\Documents and Settings\Administrator\My Documents\Development\development\build\bin\Debug\repository_test_repository.exp 1>repository.obj : warning LNK4217: locally defined symbol ?load_end@?$basic_xml_iarchive@VInputArchive@rs@@@archive@boost@@IAEXPBD@Z (protected: void __thiscall boost::archive::basic_xml_iarchive<class rs::InputArchive>::load_end(char const *)) imported in function "protected: void __thiscall boost::archive::basic_xml_iarchive<class rs::InputArchive>::load_override<class TestResource>(struct boost::serialization::nvp<class TestResource> const &,int)" (??$load_override@VTestResource@@@?$basic_xml_iarchive@VInputArchive@rs@@@archive@boost@@IAEXABU?$nvp@VTestResource@@@serialization@2@H@Z) 1>repository.obj : warning LNK4217: locally defined symbol ?load_start@?$basic_xml_iarchive@VInputArchive@rs@@@archive@boost@@IAEXPBD@Z (protected: void __thiscall boost::archive::basic_xml_iarchive<class rs::InputArchive>::load_start(char const *)) imported in function "protected: void __thiscall boost::archive::basic_xml_iarchive<class rs::InputArchive>::load_override<class TestResource>(struct boost::serialization::nvp<class TestResource> const &,int)" (??$load_override@VTestResource@@@?$basic_xml_iarchive@VInputArchive@rs@@@archive@boost@@IAEXABU?$nvp@VTestResource@@@serialization@2@H@Z) 1>repository.obj : warning LNK4217: locally defined symbol ??1?$xml_iarchive_impl@VInputArchive@rs@@@archive@boost@@IAE@XZ (protected: __thiscall boost::archive::xml_iarchive_impl<class rs::InputArchive>::~xml_iarchive_impl<class rs::InputArchive>(void)) imported in function "public: __thiscall rs::InputArchive::~InputArchive(void)" (??1InputArchive@rs@@QAE@XZ) 1>repository.obj : warning LNK4217: locally defined symbol ?load@?$xml_iarchive_impl@VInputArchive@rs@@@archive@boost@@IAEXAAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z (protected: void __thiscall boost::archive::xml_iarchive_impl<class rs::InputArchive>::load(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &)) imported in function "public: void __thiscall rs::InputArchive::load<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &)" (??$load@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@InputArchive@rs@@QAEXAAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) 1>repository.lib(Archive.obj) : error LNK2019: unresolved external symbol "public: __thiscall boost::archive::basic_xml_grammar<char>::basic_xml_grammar<char>(void)" (??0?$basic_xml_grammar@D@archive@boost@@QAE@XZ) referenced in function "protected: __thiscall boost::archive::xml_iarchive_impl<class boost::archive::naked_xml_iarchive>::xml_iarchive_impl<class boost::archive::naked_xml_iarchive>(class std::basic_istream<char,struct std::char_traits<char> > &,unsigned int)" (??0?$xml_iarchive_impl@Vnaked_xml_iarchive@archive@boost@@@archive@boost@@IAE@AAV?$basic_istream@DU?$char_traits@D@std@@@std@@I@Z) 1>repository.lib(Archive.obj) : error LNK2019: unresolved external symbol "public: void __thiscall boost::archive::basic_xml_grammar<char>::windup(class std::basic_istream<char,struct std::char_traits<char> > &)" (?windup@?$basic_xml_grammar@D@archive@boost@@QAEXAAV?$basic_istream@DU?$char_traits@D@std@@@std@@@Z) referenced in function "protected: __thiscall boost::archive::xml_iarchive_impl<class boost::archive::naked_xml_iarchive>::~xml_iarchive_impl<class boost::archive::naked_xml_iarchive>(void)" (??1?$xml_iarchive_impl@Vnaked_xml_iarchive@archive@boost@@@archive@boost@@IAE@XZ) 1>repository.lib(Archive.obj) : error LNK2019: unresolved external symbol "public: bool __thiscall boost::archive::basic_xml_grammar<char>::parse_start_tag(class std::basic_istream<char,struct std::char_traits<char> > &)" (?parse_start_tag@?$basic_xml_grammar@D@archive@boost@@QAE_NAAV?$basic_istream@DU?$char_traits@D@std@@@std@@@Z) referenced in function "protected: void __thiscall boost::archive::basic_xml_iarchive<class rs::InputArchive>::load_start(char const *)" (?load_start@?$basic_xml_iarchive@VInputArchive@rs@@@archive@boost@@IAEXPBD@Z) 1>repository.lib(Archive.obj) : error LNK2019: unresolved external symbol "public: bool __thiscall boost::archive::basic_xml_grammar<char>::parse_end_tag(class std::basic_istream<char,struct std::char_traits<char> > &)const " (?parse_end_tag@?$basic_xml_grammar@D@archive@boost@@QBE_NAAV?$basic_istream@DU?$char_traits@D@std@@@std@@@Z) referenced in function "protected: void __thiscall boost::archive::basic_xml_iarchive<class rs::InputArchive>::load_end(char const *)" (?load_end@?$basic_xml_iarchive@VInputArchive@rs@@@archive@boost@@IAEXPBD@Z) 1>repository.lib(Archive.obj) : error LNK2019: unresolved external symbol "public: bool __thiscall boost::archive::basic_xml_grammar<char>::parse_string(class std::basic_istream<char,struct std::char_traits<char> > &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &)" (?parse_string@?$basic_xml_grammar@D@archive@boost@@QAE_NAAV?$basic_istream@DU?$char_traits@D@std@@@std@@AAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@@Z) referenced in function "protected: void __thiscall boost::archive::xml_iarchive_impl<class rs::InputArchive>::load(class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > &)" (?load@?$xml_iarchive_impl@VInputArchive@rs@@@archive@boost@@IAEXAAV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@@Z) 1>repository.lib(Archive.obj) : error LNK2019: unresolved external symbol "public: void __thiscall boost::archive::basic_xml_grammar<char>::init(class std::basic_istream<char,struct std::char_traits<char> > &)" (?init@?$basic_xml_grammar@D@archive@boost@@QAEXAAV?$basic_istream@DU?$char_traits@D@std@@@std@@@Z) referenced in function "protected: void __thiscall boost::archive::xml_iarchive_impl<class rs::InputArchive>::init(void)" (?init@?$xml_iarchive_impl@VInputArchive@rs@@@archive@boost@@IAEXXZ) 1>C:\Documents and Settings\Administrator\My Documents\Development\development\build\bin\Debug\repository_test_repository.exe : fatal error LNK1120: 6 unresolved externals 1>Build log was saved at "file://c:\Documents and Settings\Administrator\My Documents\Development\development\build\components\libs\repository\repository_test_repository.dir\Debug\BuildLog.htm" 1>repository_test_repository - 13 error(s), 4 warning(s) ========== Build: 0 succeeded, 1 failed, 4 up-to-date, 0 skipped ==========

2 2

[shared_ptr] Member functions as deallocators
by Michael Crawford 14 Jun '09

14 Jun '09

I'm using shared_ptr to hold a SceneManager object. In this particular case, I don't actually want the shared_ptr to have ownership of the SceneManager, but rather take advantage of it to insure that the SceneManager it holds is cleared when the containing object (a game's state) is destroyed. The deallocator needs to call SceneManager::clearScene, but it needs to call it on the held object, so the deallocator call would be essentially (pointer held in shared_ptr)->clearScene( ); Can anyone give me some guidance on how to accomplish this? Thanks, MBC

6 8

multi-thread server with boost::asio or boost::thread?
by Matheus Araújo Aguiar 14 Jun '09

14 Jun '09

Hello boost users, I'm currently working on a MMO game server and have been using the boost::asio to deal with sockets. For now i'm concerned with responsiveness and scalability, and have been thinking of two ways to achieve that. The first way would be multiple calls to io_service.run, each in a different thread, using the strand object to synchronize the callback handlers. The other way is to explicit use threads and locks with the boost::thread lib. So could you point me what would be the main differences (maybe advantages and disadvantages) between both ways? What way do you think is it better? I want to hear some opinions. Thanx in advance and best regards! -- Matheus Araújo Aguiar Computer Scientist matheus.pit(a)gmail.com

2 3

Re: [Boost-users] Does Boost.Test support std::wstring log
by Tan, Tom (Shanghai) 14 Jun '09

14 Jun '09

>> Is it possible to use Boost.Test macros with std::wstring directly like >> this: >> BOOST_TEST_MESSAGE(L"test log"); ? >Boost.Test internally uses std::ostream. So if you want above to work >you'll need to supply appropriate output method. > >Proper wide string support is not implemented yet. > >Gennadiy Thanks for the answer, Gennadiy. While I could wrap it with another layer, it'll be great if it's a built-in feature, so that I won't copy some additional code around while using boost.test, esp. that these days I started every little project with these 2 lines: #define BOOST_TEST_MODULE my #include <boost/test/unit_test.hpp> Is this decision out of convenience or any implementation obstacle. Specifically, what would be the problems if std::basic_ostream<Ch> is used instead?

2 1

[Spirit] seeking help with AST tree generation
by Slawomir Lisznianski 14 Jun '09

14 Jun '09

Hello, Using Boost Spirit, is it possible to write a grammar that, out of the box, generates the AST tree according to cases below: Case 1: ======= Input: 1 < 2 AND 3 < 4 OR 5 < 6 Resulting tree: OR / \ AND 5 < 6 / \ 1 < 2 3 < 4 Case 2: ======= Input: 1 < 2 AND (3 < 4 OR 5 < 6) Resulting tree: AND / \ 1 < 2 OR / \ 3 < 4 5 < 6 In other words, I want to honor the parenthesis for expression grouping. How would you recommend doing it? Thank you, Slaw

3 2

ASIO iostreams example -- help?
by Dave Steffen 14 Jun '09

14 Jun '09

Hi Folks, I'm just getting into ASIO, and am having problems with the examples. I'm trying out both the tcp::iostream examples and the (more basic?) synchronous TCP daytime clients in the tutorial. I have the server print the socket endpoint, which produces: 0.0.0.0:23421 (23421 being a randomly typed socket number, once I figured out that the '13' in the examples doesn't work because Linux reserves socket numbers up to 1024 for the kernel). I then run the client, providing 0.0.0.0:23421 on the commandline as the address to connect to. I get this: Host not found (authoritative) Does anyone know what that means? I know very little (read:nothing) about the tcp protocol, which is probably the real problem. :-) Thanks -- Dave Steffen Numerica Corporation (www.numerica.us <http://www.numerica.us/> ) 4850 Hahns Peak Drive, Suite 200 Loveland, Colorado 80538 main (970) 461-2000 direct (970) 461-2422 x227 fax (970) 461-2004 Email: dave.steffen(a)numerica.us

3 2

Simple question about boost::random
by Zachary Turner 13 Jun '09

13 Jun '09

I think I'm overlooking something very simple, but I'm trying to generate random numbers that are uniform over the open range of various data types. So I wrote this code: template<typename T> struct rand_type_range { typedef boost::numeric::bounds<T> bounds; static T generate() { static boost::uniform_int<T> range(bounds::lowest()+1, bounds::highest()-1); static boost::variate_generator<boost::minstd_rand&, boost::uniform_int<T> > generate(rng, range); return generate(); } }; Using this with anything other than a boost::uint32_t gives lots of warnings, although the results turn out correct. Looking at the warnings it seems the infrastructure is still trying to use boost::uint32_t's for everything, so am I missing something simple? 1>Q:\include\boost\1.39.0\boost/random/uniform_int.hpp(135) : warning C4244: '+=' : conversion from 'unsigned long' to 'unsigned short', possible loss of data 1> Q:\include\boost\1.39.0\boost/random/uniform_int.hpp(64) : see reference to function template instantiation 'unsigned short boost::uniform_int<IntType>::generate<Engine>(Engine &,unsigned short,unsigned short,unsigned short)' being compiled 1> with 1> [ 1> IntType=boost::uint16_t, 1> Engine=boost::random::detail::pass_through_engine<boost::random::detail::pass_through_engine<boost::random::linear_congruential<boost::int32_t,48271,0,2147483647,399268537> >> 1> ] 1> Q:\include\boost\1.39.0\boost/random/variate_generator.hpp(100) : see reference to function template instantiation 'unsigned short boost::uniform_int<IntType>::operator ()<boost::random::detail::pass_through_engine<UniformRandomNumberGenerator>>(Engine &)' being compiled 1> with 1> [ 1> IntType=boost::uint16_t, 1> UniformRandomNumberGenerator=boost::random::detail::pass_through_engine<boost::random::linear_congruential<boost::int32_t,48271,0,2147483647,399268537> >, 1> Engine=boost::random::detail::pass_through_engine<boost::random::detail::pass_through_engine<boost::random::linear_congruential<boost::int32_t,48271,0,2147483647,399268537> >> 1> ] 1> Q:\include\boost\1.39.0\boost/random/variate_generator.hpp(100) : while compiling class template member function 'unsigned short boost::variate_generator<Engine,Distribution>::operator ()(void)' 1> with 1> [ 1> Engine=boost::minstd_rand &, 1> Distribution=boost::uniform_int<boost::uint16_t> 1> ] 1> c:\dev\agent\windows\tests\bit_search.hpp(54) : see reference to class template instantiation 'boost::variate_generator<Engine,Distribution>' being compiled 1> with 1> [ 1> Engine=boost::minstd_rand &, 1> Distribution=boost::uniform_int<boost::uint16_t> 1> ] 1> c:\dev\agent\windows\tests\bit_search.hpp(52) : while compiling class template member function 'boost::uint16_t rand_type_value<T>::generate(void)' 1> with 1> [ 1> T=boost::uint16_t 1> ] 1> c:\dev\agent\windows\tests\bit_search.hpp(62) : see reference to class template instantiation 'rand_type_value<T>' being compiled 1> with 1> [ 1> T=boost::uint16_t 1> ] 1>Q:\include\boost\1.39.0\boost/random/detail/signed_unsigned_tools.hpp(64) : warning C4244: 'return' : conversion from 'base_unsigned' to 'unsigned short', possible loss of data 1> Q:\include\boost\1.39.0\boost/random/detail/signed_unsigned_tools.hpp(64) : while compiling class template member function 'unsigned short boost::random::detail::add<T1,T2>::operator ()(T1,T2)' 1> with 1> [ 1> T1=base_unsigned, 1> T2=unsigned short 1> ] 1> Q:\include\boost\1.39.0\boost/random/uniform_int.hpp(116) : see reference to class template instantiation 'boost::random::detail::add<T1,T2>' being compiled 1> with 1> [ 1> T1=base_unsigned, 1> T2=unsigned short 1> ] 1> Q:\include\boost\1.39.0\boost/random/uniform_int.hpp(64) : see reference to function template instantiation 'unsigned short boost::uniform_int<IntType>::generate<Engine>(Engine &,unsigned short,unsigned short,unsigned short)' being compiled 1> with 1> [ 1> IntType=boost::uint16_t, 1> Engine=boost::random::detail::pass_through_engine<boost::random::detail::pass_through_engine<boost::random::linear_congruential<boost::int32_t,48271,0,2147483647,399268537> >> 1> ] 1>Q:\include\boost\1.39.0\boost/random/uniform_smallint.hpp(79) : warning C4244: 'return' : conversion from 'long' to 'unsigned short', possible loss of data 1> Q:\include\boost\1.39.0\boost/random/uniform_int.hpp(150) : see reference to function template instantiation 'unsigned short boost::uniform_smallint<IntType>::operator ()<Engine>(Engine &)' being compiled 1> with 1> [ 1> IntType=unsigned short, 1> Engine=boost::random::detail::pass_through_engine<boost::random::detail::pass_through_engine<boost::random::linear_congruential<boost::int32_t,48271,0,2147483647,399268537> >> 1> ] 1>Linking... 1>LINK : c:\dev\agent\windows\tests\debug-winxp\Win32\bin\tests.exe not found or not built by the last incremental link; performing full link

2 1

unique_ptr?
by Robert Dailey 13 Jun '09

13 Jun '09

Hey guys, I remember a while back using boost::unique_ptr<Foo>, but I can't seem to find that class anymore. I'm using Boost 1.39. I noticed boost::interprocess::unique_ptr, but this isn't the same thing I'm looking for. Where can I find the boost::unique_ptr class? Is this in the sandbox somewhere? Thanks.

3 3

[PropertyTree] Rewrite - Please Review
by Sebastian Redl 13 Jun '09

13 Jun '09

Hi PropertyTree users, I have completed the main bulk of the property tree rewrite/cleanup. In the course of this, I have made the code standard-compliant (it previously used a std::list of an incomplete type, which is not, strictly speaking, valid), made it follow the claimed complexities (find() was O(n), although the docs said it's O(log n)), and revised the customization interface quite thoroughly. Inevitably, there were breaking changes in this process. I would ask everyone who has existing code using PropertyTree to look at these changes and tell me their best guess at how much effort it would be to update the code to conform with the new interface, and how I could make this easier. The development is still in a branch, so you need to check out the SVN branch http://svn.boost.org/svn/boost/branches/sredl_2009_05_proptree_update to try out the new version. The breaking changes are as follows: 1) Probably the most common change need: ptree::find() now returns the new type assoc_iterator (const_assoc_iterator for the const version) instead of iterator (const_iterator). This means that you need to change the type of the variable you capture the result with to assoc_iterator. It also means you need to compare the result of find() against ptree::not_found() instead of ptree::end(). You can get an iterator from an assoc_iterator by passing it to ptree::to_iterator(). The other projection direction is currently not supported, although it would be trivial to add. 2) The number and order of template arguments to basic_ptree has been changed. The old arguments were * Key comparison predicate * Key type * Path type * Data type * Translator type The new arguments are * Key type * Data type * Key comparison predicate (defaults to std::less<Key>) The old order prevented defaulting and wasn't very useful in general. The new order is consistent with std::map. The path and translator arguments have been removed to simplify the interface of basic_ptree. Equivalent functionality is available (see below). If you used your own instantiation of basic_ptree before, instead of simply using the (wi)ptree typedefs, you will have to adapt your code to the new order. If you used custom path and/or translator types, read on. 3) put and put_child previously had a final parameter 'bool do_not_replace'. I don't like boolean parameters, especially those whose name contains a negation. I removed the parameter, and replaced its functionality by a pair of new functions, add and add_child. If you previously called put or put_child passing true for do_not_replace, you must change these calls to add or add_child, respectively. If you ever passed false explicitly, you have to remove this parameter. 4) Using custom path types has changed. You can no longer create individual basic_ptree instantiations with custom path types. Instead, a key type has a fixed path type associated with it. I can bring this functionality back pretty easily if required, but I want to see use cases for this first. (Such things are why I make this call for reviews.) Less template parameters to ptree is good, in my opinion. To use a key type other than std::basic_string specializations, you have to specialize boost::property_tree::path_of for this key type. The path_of struct contains a single type called type, which is the path to use for this key type. The way paths are implemented has also changed thoroughly. Previously, you had to implement a const and a non-const variant of get_child, plus put_child (with do_not_replace making that effectively two functions too). These functions contained a lot of logic that really belonged into ptree, making implementing custom paths tedious and error-prone. The new interface requires you to implement four functions, but they're far simpler. The functions are described in ptree_fwd.hpp in C++0x concept syntax, but here's the gist: bool path::empty() const -> is the path empty? bool path::single() const -> does the path contain a single element? key_type path::reduce() -> chop off the first part of this path and return it (basically a pop_front that returns the value). std::string dump() const -> get a readable form of this path for exception messages; feel free to return "" here if you don't care. The new interface should be easy to implement, and the tree traversal is now where it belongs (in the internal implementation functions walk_path and force_path). 5) Using custom translators has changed. A ptree no longer has a fixed translator associated with it. Instead, you can supply a custom translator to every get_value/get/put_value/put operation or use the default, which depends on the tree's data type and the type you extract/insert. An example: ptree pt; pt.put("k1.k2", 100); // Uses the default translator for std::string+int. // Note: the explicit template parameter here will go away. float f = pt.get<float>("k1.k2", my_special_float_string_converter()); The tree's own data type is called the internal type, while the parameter/return type is called the external type. The default translator for a internal+external pair is set by specializing the boost::property_tree::translator_between struct. By default, PropertyTree supplies an id_translator for when the internal and external types are the same, and a stream_translator for converting between a basic_string and anything else. Together, they faithfully emulate the behavior of the old default translator. Writing a custom translator is easy. It's a class that provides two typedefs and two functions: typename internal_type -> the internal data type typename external_type -> the external data type optional<external_type> Tr::get_value(internal_type) -> convert from the internal to the external type, boost::none on failure optional<internal_type> Tr::put_value(external_type) -> convert from the external to the internal type, boost::none on failure That's it for the changes. The new version of property tree is not quite complete yet. I still need to polish the documentation a little and document the new extension mechanisms properly. I also need to clean up a little. Finally, the INI parser doesn't work at the moment. However, the main functionality (tested by property_tree_test) plus the XML, JSON and INFO parsers should all work now. Looking forward to your feedback. Sebastian

4 5

date/time input facets - what am I doing wrong?
by Joe Nardone 13 Jun '09

13 Jun '09

I'm trying to get input facets working for dates and times using time_input_facet. (Boost 1.33.1 on RHEL5; upgrading is not an option at the moment) std::stringstream ss; ss.str("Feb 28 16:22:11 2009"); time_input_facet* tf = new time_input_facet("%b %e %H:%M:%S %Y"); ss.imbue(std::locale(std::locale::classic(), tf)); ss.exceptions(std::ios_base::failbit); ptime z; ss >> z; std::cout<< z << std::endl; This throws an exception - Parse failed. No match found for '' I figure I'm missing something simple. (when I try a different format: "%b %e %Y %H:%M:%S" for "Feb 28 2009 11:15:11" I get a "Year is out of valid range: 1400..10000" exception??) Thanks for any insight. joe

3 2

[program_options] [msvc 2010] 1.34.1: Error when compiling
by Boris Dušek 13 Jun '09

13 Jun '09

Hello, I got hands on the Visual Studio 2010 Beta 1 and had to rebuild the 1.34.1 version of boost libraries I use in my project with the new VC 10 compiler. Thread, Test, IOStreams, Filesystem built fine, but program_options failed. Let me first clarify why I do need 1.34.1: This is the version that is most available on Linux servers (including the one I develop for), so I need this version on my development box to ensure source code compatibility, even though this version does not officially support even VC 9 (which however builds it fine and I happily use it). Below I list the errors that happened with the VC 10 compiler. I aggregated them to 3 issues. For multiple occurences of issue 1., I only copy/paste the full output for the first occurence. I would welcome if someone could tell me if these are the new compiler's fault, or not. If they are, I plan to report them on MS Connect so that they can hopefully get fixed before next Beta (or at least before the RTM). 1. C2668: 'boost::bind' : ambiguous call to overloaded function ======================================== Happens here: libs\program_options\src\cmdline.cpp(198) libs\program_options\src\cmdline.cpp(202) libs\program_options\src\cmdline.cpp(206) libs\program_options\src\cmdline.cpp(210) libs\program_options\src\cmdline.cpp(213) libs\program_options\src\cmdline.cpp(215) libs\program_options\src\parsers.cpp(73) For the first occurence (cmdline.cpp(198)), the message states these further details (I checked the boost::bind vs. std::tr1::bind is listed in all 7 occurences): C:\Documents and Settings\Boris\My Documents\Downloads\boost_1_34_1\boost/bind/bind_mf_cc.hpp(43): could be 'boost::_bi::bind_t<R,F,L> boost::bind<std::vector<_Ty>,boost::program_options::detail::cmdline,std::vector<std::string>&,boost::program_options::detail::cmdline*,boost::arg>(R (__thiscall boost::program_options::detail::cmdline::* )(B1),A1,A2)' with [ R=std::vector<boost::program_options::option>, F=boost::_mfi::mf1<std::vector<boost::program_options::option>,boost::program_options::detail::cmdline,std::vector<std::string> &>, L=boost::_bi::list2<boost::_bi::value<boost::program_options::detail::cmdline *>,boost::arg<1>>, _Ty=boost::program_options::option, I=1, B1=std::vector<std::string> &, A1=boost::program_options::detail::cmdline *, A2=boost::arg<1> ] C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\xxbind1(431): or 'std::tr1::_Bind<_Result_type,_Ret,_BindN> std::tr1::bind<boost::program_options::detail::cmdline,std::vector<_Ty>&,boost::program_options::detail::cmdline*,boost::arg,std::vector<boost::program_options::option>>(_Rx (__thiscall boost::program_options::detail::cmdline::* const )(_Farg1),_Arg0,_Arg1)' [found using argument-dependent lookup] with [ _Result_type=std::vector<boost::program_options::option>, _Ret=std::vector<boost::program_options::option>, _BindN=std::tr1::_Bind2<std::tr1::_Callable_pmf<std::vector<boost::program_options::option> (__thiscall boost::program_options::detail::cmdline::* const )(std::vector<std::string> &),boost::program_options::detail::cmdline,false>,boost::program_options::detail::cmdline *,boost::arg<1>>, _Ty=std::string, I=1, _Rx=std::vector<boost::program_options::option>, _Farg1=std::vector<std::string> &, _Arg0=boost::program_options::detail::cmdline *, _Arg1=boost::arg<1> ] while trying to match the argument list '(std::vector<_Ty> (__thiscall boost::program_options::detail::cmdline::* )(std::vector<std::string> &), boost::program_options::detail::cmdline *const , boost::arg)' with [ _Ty=boost::program_options::option ] and [ I=1 ] 2. Deduction of template parameters for std::transform (C2780, C2784) ================================================= libs\program_options\src\parsers.cpp(73) : error C2780: '_OutTy *std::transform(_InIt1,_InIt1,_InTy (&)[_InSize],_OutTy (&)[_OutSize],_Fn2)' : expects 5 arguments - 4 provided C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\algorithm(1288) : see declaration of 'std::transform' libs\program_options\src\parsers.cpp(73) : error C2780: '_OutTy *std::transform(_InIt1,_InIt1,_InIt2,_OutTy (&)[_OutSize],_Fn2)' : expects 5 arguments - 4 provided C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\algorithm(1274) : see declaration of 'std::transform' libs\program_options\src\parsers.cpp(73) : error C2780: '_OutIt std::transform(_InIt1,_InIt1,_InTy (&)[_InSize],_OutIt,_Fn2)' : expects 5 arguments - 4 provided C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\algorithm(1262) : see declaration of 'std::transform' libs\program_options\src\parsers.cpp(73) : error C2780: '_OutIt std::transform(_InIt1,_InIt1,_InIt2,_OutIt,_Fn2)' : expects 5 arguments - 4 provided C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\algorithm(1244) : see declaration of 'std::transform' libs\program_options\src\parsers.cpp(73) : error C2784: '_OutTy *std::transform(_InIt,_InIt,_OutTy (&)[_OutSize],_Fn1)' : could not deduce template argument for '_OutTy (&)[_OutSize]' from 'std::back_insert_iterator<_Container>' with [ _Container=std::vector<std::wstring> ] C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\algorithm(1122) : see declaration of 'std::transform' 3. cannot convert from 'std::_Tree_const_iterator<_Mytree>' to 'std::_Tree_iterator<_Mytree> ================================================================= C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\map(258) : error C2440: 'initializing' : cannot convert from 'std::_Tree_const_iterator<_Mytree>' to 'std::_Tree_iterator<_Mytree>' with [ _Mytree=std::_Tree_val<std::_Tmap_traits<std::string,boost::program_options::variable_value,std::less<std::string>,std::allocator<std::pair<const std::string,boost::program_options::variable_value>>,false>> ] No constructor could take the source type, or constructor overload resolution was ambiguous C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\map(257) : while compiling class template member function 'const boost::program_options::variable_value &std::map<_Kty,_Ty>::at(const std::basic_string<_Elem,_Traits,_Ax> &) const' with [ _Kty=std::string, _Ty=boost::program_options::variable_value, _Elem=char, _Traits=std::char_traits<char>, _Ax=std::allocator<char> ] C:\Documents and Settings\Boris\My Documents\Downloads\boost_1_34_1\boost/program_options/variables_map.hpp(139) : see reference to class template instantiation 'std::map<_Kty,_Ty>' being compiled with [ _Kty=std::string, _Ty=boost::program_options::variable_value ] Maybe this info from VC10 developer blog helps for some cases: "TR1/C++0x components ... they still live in std::tr1 and are dragged into std with using-declarations" [1] Any comments on whether these are compiler's faults or not would be welcome. Thanks, Boris Dušek [1]: http://blogs.msdn.com/vcblog/archive/2009/05/25/stl-breaking-changes-in-vis…

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Serializing derived class in dll
by Christian Bergstrand 13 Jun '09

13 Jun '09

I am working on a programwith pluggable classes delivered in DLLs, so I have an virtual abstract base class in my EXE and both abstract and concrete classes in a hiearchy in my first DLL. I am trying ot serialize the derived class instances through a base class pointer. I am not able to get it to work after reading the samples in the documentation and the most likely looking threads here. So I broke it down in to a sample EXE/DLL and can still not get it to work. I am using version 1_38 currently, also tried with 1_36_0 I am getting the exeption on oserializer.hpp:374 where the comment says // note:if this exception is thrown, be sure that derived pointer // is either registered or exported. In my opinion I am exporting my derived class, but I am feeling that it is probably going into the wrong instance, since the export code is going into the DLL, but I can not find any other recomendation. So what am I missing ... ------------------------ serializedll\base.h ------------------------ #pragma once class Base { public: virtual void f() = 0; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { } }; BOOST_SERIALIZATION_ASSUME_ABSTRACT( Base ) ------------------------ serializedll\serializedll.cpp, in the EXE ------------------------ #include <tchar.h> #include <windows.h> #include <fstream> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/nvp.hpp> #include "base.h" int _tmain(int argc, _TCHAR* argv[]) { typedef Base * ( GetObjFun )(); GetObjFun * f = (GetObjFun*)GetProcAddress( LoadLibrary( TEXT( "plugin.dll" ) ), "getobj" ); Base * obj = f(); std::ofstream ofs( "c:\\test.xml" ); boost::archive::text_oarchive oa(ofs); oa << obj; return 0; } ------------------------ plugin\plugin.cpp, in the DLL ------------------------ #include <windows.h> #include <boost/serialization/export.hpp> #include <boost/archive/text_oarchive.hpp> #include "../serializedll/base.h" BOOL APIENTRY DllMain( HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved ) { return TRUE; } class Derived : public Base { public: virtual void f() { } private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & boost::serialization::base_object< Base >( *this ); } }; BOOST_CLASS_EXPORT( Derived ) Base * getobj() { return new Derived(); }

2 3

Re: [Boost-users] Boost.Filesystem with MSVC8 & STLPort linker errors
by Craig Henderson 12 Jun '09

12 Jun '09

> > I have an application using Boost.Filesystem, Boost.Thread and others, that > > I am building on Windows XP using MSVC8, STLPort and Boost 1.39.0. I have > > built Boost using Boost Jam 3.1.17 and STLPort. > > How exactly? What commands did you type, and what configuration files are you > using? Did you use stdlib=stlport ? For STLPORT I used: STLport-5.2.1>set include=...\STLport\STLport-5.2.1\stlport;%include% STLport-5.2.1>configure msvc8 -p winxp -x --without-thread STLport-5.2.1\build\lib>nmake clean install And then for Boost, edited boost_1_39_0\tools\build\v2\user-config.jam to # ------------------- # MSVC configuration. # ------------------- # Configure specific msvc version (searched for in standard locations and PATH). using msvc : 8.0 ; # ---------------------- # STLPort configuration. # ---------------------- using stlport : : ...\STLport\STLport-5.2.1\stlport ...\STLport\STLport-5.2.1\lib\vc8 ; and built with boost_1_39_0>set include=...\STLport\STLport-5.2.1\stlport;%include% boost_1_39_0> ..\bjam --toolset=msvc stdlib=stlport "stdlib:stlport-iostream=on" --with-filesystem --with-thread --with-date_time Regards -- Craig

3 4

Serialization of boost::posix_time::ptime
by Archie14 12 Jun '09

12 Jun '09

I am saving and restoring thousand ptimes and integers. If I am saving/restoring only ptimes - everything works. If I add integers to it - it breaks. Code to reproduce the problem is shown below. I will appreciate any help in solving the problem. void test() { boost::gregorian::date ofdate = boost::gregorian::day_clock::local_day(); boost::posix_time::ptime dt = boost::posix_time::second_clock().local_time(); dt = boost::posix_time::ptime(ofdate, dt.time_of_day()); boost::posix_time::ptime dtcurrent = dt; std::ofstream fst; fst.open(L"c:\\test.test", std::ios_base::binary); for (int i = 0; i<1000;i++) { fst.write((char*)&i, sizeof(int)); dtcurrent += boost::posix_time::time_duration(0,0, i); fst<<dtcurrent; } fst.close(); std::ifstream ist(L"c:\\test.test", std::ios_base::binary); dtcurrent = dt; for (int i = 0; i<1000;i++) { dtcurrent += boost::posix_time::time_duration(0,0, i); int j = -1; ist.read((char*)&j, sizeof(int)); boost::posix_time::ptime dt1; ist>>dt1; assert ( (dtcurrent == dt1) && (j == i) ); } ist.close(); }

1 0

[mpi] failed test and other issues
by Nick Collier 12 Jun '09

12 Jun '09

Hi, I'm using boost-1.39.0 with openMpi 1.3.2 on OSX 10.5.7. I'm getting some strange behavior when sending and receiving a vector of pointers between processes. The received pointer addresses are sometimes invalid. I'm not using the skeleton content code, just sending and receiving the vector. Some output: [2] processing edges from 1 [2] unpacking edge 0x834810 [2] unpacking edge 0x834810 [0] processing edges from 2 [0] unpacking edge 0x834ec0 [0] unpacking edge 0x834ec0 [2] processing edges from 3 [2] unpacking edge 0x8346c0 [2] unpacking edge 0x8346c0 [2] processing edges from 0 [2] unpacking edge 0x1 [2] unpacking edge 0x1 The hex value is the pointer address, and obviously doing anything with the edge with the weird address causes the app to crash. I can't see that I'm doing anything wrong (although of course that's a possibility) and so I thought I'd run the boost mpi tests. The skeleton_content_test fails consistently with the following output: Broadcasting integer list skeleton from root 0...OK. Broadcasting integer list content from root 0...OK. Broadcasting reversed integer list content from root 0...OK. ../../../boost/test/minimal.hpp(123): exception "memory access violation at address: 0x974bfd1c: non-existent physical address" caught in function: 'int main(int, char**)' **** Testing aborted.../../../boost/test/minimal.hpp(123): exception "memory access violation at address: 0x974bfd1c: non-existent physical address" caught in function: 'int main(int, char**)' **** Testing aborted. **** 1 error detected ../../../boost/test/minimal.hpp(123): exception "memory access violation at address: 0x974bfd1c: non-existent physical address" caught in function: 'int main(int, char**)' **** Testing aborted. **** 1 error detected ../../../boost/test/minimal.hpp(123): exception "memory access violation at address: 0x974bfd1c: non-existent physical address" caught in function: 'int main(int, char**)' **** Testing aborted. **** 1 error detected ../../../boost/test/minimal.hpp(123): exception "memory access violation at address: 0x974bfd1c: non-existent physical address" caught in function: 'int main(int, char**)' **** Testing aborted. **** 1 error detected **** 1 error detected ../../../boost/test/minimal.hpp(123): exception "memory access violation at address: 0x974bfd1c: non-existent physical address" caught in function: 'int main(int, char**)' **** Testing aborted. **** 1 error detected I'm not sure if this is related to my problem but the memory issues made me wonder. Any help is appreciated, thanks, Nick

3 5

Boost.Filesystem with MSVC8 & STLPort linker errors
by Craig Henderson 12 Jun '09

12 Jun '09

Hi, I have an application using Boost.Filesystem, Boost.Thread and others, that I am building on Windows XP using MSVC8, STLPort and Boost 1.39.0. I have built Boost using Boost Jam 3.1.17 and STLPort. Using the MSVC native STL I get no errors and everything runs well, but with the STL version, I have four linker errors; all from Boost.Filesystem. Has anyone come across this problem before and found a solution, or give me a clue what might be wrong? Many thanks -- Craig 1>fsdatasource.obj : error LNK2019: unresolved external symbol "class boost::filesystem::file_status __cdecl boost::filesystem::detail::status_api(class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > const &,class boost::system::error_code &)" (?status_api@detail@filesystem@boost@@YA?AVfile_status@23@ABV?$basic_string@ DV?$char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@AAVerror_code@syst em@3@@Z) referenced in function "bool __cdecl boost::filesystem::is_directory<class boost::filesystem::basic_path<class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> >,struct boost::filesystem::path_traits> >(class boost::filesystem::basic_path<class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> >,struct boost::filesystem::path_traits> const &)" (??$is_directory@V?$basic_path@V?$basic_string@DV?$char_traits@D@stlpd_std@@ V?$allocator@D@2@@stlpd_std@@Upath_traits@filesystem@boost@@@filesystem@boos t@@@filesystem@boost@@YA_NABV?$basic_path@V?$basic_string@DV?$char_traits@D@ stlpd_std@@V?$allocator@D@2@@stlpd_std@@Upath_traits@filesystem@boost@@@01@@ Z) 1>fsdatasource.obj : error LNK2019: unresolved external symbol "class boost::system::error_code __cdecl boost::filesystem::detail::dir_itr_increment(void * &,class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > &,class boost::filesystem::file_status &,class boost::filesystem::file_status &)" (?dir_itr_increment@detail@filesystem@boost@@YA?AVerror_code@system@3@AAPAXA AV?$basic_string@DV?$char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@A AVfile_status@23@2@Z) referenced in function "private: void __thiscall boost::filesystem::basic_directory_iterator<class boost::filesystem::basic_path<class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> >,struct boost::filesystem::path_traits> >::increment(void)" (?increment@?$basic_directory_iterator@V?$basic_path@V?$basic_string@DV?$cha r_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@Upath_traits@filesystem@b oost@@@filesystem@boost@@@filesystem@boost@@AAEXXZ) 1>fsdatasource.obj : error LNK2019: unresolved external symbol "class boost::system::error_code __cdecl boost::filesystem::detail::dir_itr_first(void * &,class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > const &,class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > &,class boost::filesystem::file_status &,class boost::filesystem::file_status &)" (?dir_itr_first@detail@filesystem@boost@@YA?AVerror_code@system@3@AAPAXABV?$ basic_string@DV?$char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@AAV67 @AAVfile_status@23@3@Z) referenced in function "private: class boost::system::error_code __thiscall boost::filesystem::basic_directory_iterator<class boost::filesystem::basic_path<class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> >,struct boost::filesystem::path_traits> >::m_init(class boost::filesystem::basic_path<class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> >,struct boost::filesystem::path_traits> const &)" (?m_init@?$basic_directory_iterator@V?$basic_path@V?$basic_string@DV?$char_t raits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@Upath_traits@filesystem@boos t@@@filesystem@boost@@@filesystem@boost@@AAE?AVerror_code@system@3@ABV?$basi c_path@V?$basic_string@DV?$char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_ std@@Upath_traits@filesystem@boost@@@23@@Z) 1>fsdatasource.obj : error LNK2019: unresolved external symbol "class boost::system::error_code __cdecl boost::filesystem::detail::remove_api(class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > const &)" (?remove_api@detail@filesystem@boost@@YA?AVerror_code@system@3@ABV?$basic_st ring@DV?$char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@@Z) referenced in function "bool __cdecl boost::filesystem::detail::remove_aux<class boost::filesystem::basic_path<class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> >,struct boost::filesystem::path_traits> >(class boost::filesystem::basic_path<class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> >,struct boost::filesystem::path_traits> const &,class boost::filesystem::file_status)" (??$remove_aux@V?$basic_path@V?$basic_string@DV?$char_traits@D@stlpd_std@@V? $allocator@D@2@@stlpd_std@@Upath_traits@filesystem@boost@@@filesystem@boost@ @@detail@filesystem@boost@@YA_NABV?$basic_path@V?$basic_string@DV?$char_trai ts@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@Upath_traits@filesystem@boost@@ @12@Vfile_status@12@@Z)

2 1

Re: [Boost-users] C++ Framework Libraries for Programming Populardatabases
by biolaser 12 Jun '09

12 Jun '09

Thanks all for your help in pointing me to solutions for database programming framework libraries. Please let me know if additional prospects become available.

1 0

[Multi-Index] Get container view of a non-unique-index equal_range?
by Dominique Devienne 12 Jun '09

12 Jun '09

Given for example class Ident : public noncopyable { .. .}; class VehicleIdent : public Ident { ... }; struct ByUid {}; struct ByType {}; struct ByNKey {}; struct VehicleIdentHash { ... }; struct VehicleIdentPred { ... }; typedef boost::multi_index_container< shared_ptr<VehicleIdent>, indexed_by< hashed_unique< // primary (surrogate) key tag<ByUid>, BOOST_MULTI_INDEX_CONST_MEM_FUN( Ident, const Uid&, uid ) >, hashed_unique< // natural key (logical primary key) tag<ByNKey>, identity< shared_ptr<VehicleIdent> >, VehicleIdentHash, VehicleIdentPred >, // additional index to iterate on a type range (e.g. all Cars) hashed_non_unique< tag<ByType>, BOOST_MULTI_INDEX_CONST_MEM_FUN( VehicleIdent, const string&, type ) > > > VehicleIndex; typedef VehicleIndex::index<ByUid>::type VehicleByUid; typedef VehicleIndex::index<ByType>::type VehicleByType; typedef VehicleIndex::index<ByNKey>::type VehicleByNKey; I'd like to be able to have a "view" of VehicleIndex, for example compatible with unordered_set in this case since using a hashed index, for a given vehicle type ("Audi" for example), and going further have this view allow inserts which would go into the "master" vehicle index under the cover, validated by its unique indexes. In pseudo-code, something a bit like this: struct VehicleMake { VehicleByType::EqualRangeView& models_; VehicleMake(const string& name) : models_(get<ByType>(get_vehicle_index()).equal_range_view(name)) {} }; With models_ behaving has a normal container one can iterate on (begin, end), query (empty, find, count), modify (insert, erase, clear, etc...), those operations only affecting the VehicleIndex elements matching the VehicleByType given range, and possibly asserting all inserts are valid for the range (the vehicles added via the "range view" have the type matching the range's type). Can this be done? Has it been considered as a possible extension, and is it even feasible given the current B.MI design? Any input on how to achieve or emulate the above would be appreciated. Thanks, --DD PS: The above design is synthetic of course. We have a parent-child hierarchy of C++ objects where parents have lists of their children, but now there's a list of all children, from all parents, in a B.MI, indexed (non-unique) on the parent instance, and I'd like the "concrete" list maintained by each parent to become the kind of "view" I'm describing above. Right now I'm manually maintaining the sync of the existing and the new "master" list (the B.MI index), having to "sprinkle" the code to keep them in sync, but the "view" approach above would be cleaner IMHO, and avoid many potential bugs from forgetting to "sprinkle" in all the right places.

2 4

Help needed to implement D_shortest_path
by Amanullah Yasin 12 Jun '09

12 Jun '09

Hi Dear all, Sorry for disturbing, i hope you can help me because i am facing one problem i tried a lot but i can not succeeded. To find the directed path between two nodes. First i tried to implement Depth First Search but it is searching the verteces even there is no edge exist. so, now i want to implement dijkstra_shortest_path , it is giving errors. Please guide me how i can implement this method. code is : slGraph& graph = this->pBN->get_graph(); slNode n = vertex(2, graph); std::vector<slNode> p(num_vertices(graph)); std::vector<int> d(num_vertices(graph)); boost::property_map<slGraph, edge_weight_t>::type weightMap = get(edge_weight, graph); boost::property_map<slGraph, vertex_index_t>::type indexmap = get(vertex_index, graph); dijkstra_shortest_paths(graph, n, predecessor_map(&p[0]).distance_map(&d[0])); // First pattern to implement //dijkstra_shortest_paths(graph, n, &p[0], &d[0], weightMap, indexmap, // std::less<int>(), closed_plus<int>(), // second pattern // (std::numeric_limits<int>::max)(), 0, // default_dijkstra_visitor()); ============================================ errors ============================================================== 1>c:\probt_slp\boost\include\boost\graph\dijkstra_shortest_paths.hpp(251) : error C2664: 'void put<int,DistInf>(T *,ptrdiff_t,const V &)' : cannot convert parameter 2 from 'void *' to 'ptrdiff_t' 1> with 1> [ 1> DistInf=int, 1> T=int, 1> V=int 1> ] 1> There is no context in which this conversion is possible 1> c:\probt_slp\boost\include\boost\graph\dijkstra_shortest_paths.hpp(292) : see reference to function template instantiation 'void boost::dijkstra_shortest_paths<VertexListGraph,boost::dijkstra_visitor<>,void**__w64 ,DistanceMap,WeightMap,IndexMap,std::less<_Ty>,boost::closed_plus<T>,int,int,ColorMap>(const VertexListGraph &,void *,PredecessorMap,DistanceMap,WeightMap,IndexMap,Compare,Combine,DistInf,DistZero,DijkstraVisitor,ColorMap)' being compiled 1> with 1> [ 1> VertexListGraph=slGraph, 1> DistanceMap=int *__w64 , 1> WeightMap=boost::adj_list_edge_property_map<boost::bidirectional_tag,long double,const long double &,void *,const boost::property<boost::edge_weight_t,slScoreValueType>,boost::edge_weight_t>, 1> IndexMap=boost::adj_list_vertex_property_map<slGraph,unsigned int,const unsigned int &,boost::vertex_index_t>, 1> _Ty=D, 1> T=D, 1> ColorMap=boost::iterator_property_map<std::_Vector_iterator<boost::default_color_type,std::allocator<boost::default_color_type>>,boost::adj_list_vertex_property_map<slGraph,unsigned int,const unsigned int &,boost::vertex_index_t>,boost::default_color_type,boost::default_color_type &>, 1> PredecessorMap=void **__w64 , 1> Compare=std::less<D>, 1> Combine=boost::closed_plus<D>, 1> DistInf=int, 1> DistZero=int, 1> DijkstraVisitor=boost::dijkstra_visitor<> 1> ] 1> c:\probt_slp\boost\include\boost\graph\dijkstra_shortest_paths.hpp(322) : see reference to function template instantiation 'void boost::detail::dijkstra_dispatch2<VertexListGraph,int*__w64 ,WeightMap,IndexMap,Params,boost::iterator_property_map<RandomAccessIterator,IndexMap,T,R>>(const VertexListGraph &,void *,DistanceMap,WeightMap,IndexMap,const Params &,ColorMap)' being compiled 1> with 1> [ 1> VertexListGraph=slGraph, 1> WeightMap=boost::adj_list_edge_property_map<boost::bidirectional_tag,long double,const long double &,void *,const boost::property<boost::edge_weight_t,slScoreValueType>,boost::edge_weight_t>, 1> IndexMap=boost::adj_list_vertex_property_map<slGraph,unsigned int,const unsigned int &,boost::vertex_index_t>, 1> Params=boost::bgl_named_params<int *__w64 ,boost::vertex_distance_t,boost::bgl_named_params<void **__w64 ,boost::vertex_predecessor_t,boost::no_property>>, 1> RandomAccessIterator=std::_Vector_iterator<boost::default_color_type,std::allocator<boost::default_color_type>>, 1> T=boost::default_color_type, 1> R=boost::default_color_type &, 1> DistanceMap=int *__w64 , 1> ColorMap=boost::iterator_property_map<std::_Vector_iterator<boost::default_color_type,std::allocator<boost::default_color_type>>,boost::adj_list_vertex_property_map<slGraph,unsigned int,const unsigned int &,boost::vertex_index_t>,boost::default_color_type,boost::default_color_type &> 1> ] 1> c:\probt_slp\boost\include\boost\graph\dijkstra_shortest_paths.hpp(342) : see reference to function template instantiation 'void boost::detail::dijkstra_dispatch1<VertexListGraph,int*__w64 ,boost::adj_list_edge_property_map<Directed,Value,Ref,Vertex,Property,Tag>,boost::adj_list_vertex_property_map<Graph,ValueType,Reference,boost::vertex_index_t>,boost::bgl_named_params<T,boost::vertex_distance_t,Base>,boost::detail::error_property_not_found>(const VertexListGraph &,void *,DistanceMap,WeightMap,IndexMap,const Params &,ColorMap)' being compiled 1> with 1> [ 1> VertexListGraph=slGraph, 1> Directed=boost::bidirectional_tag, 1> Value=long double, 1> Ref=const long double &, 1> Vertex=void *, 1> Property=const boost::property<boost::edge_weight_t,slScoreValueType>, 1> Tag=boost::edge_weight_t, 1> Graph=slGraph, 1> ValueType=unsigned int, 1> Reference=const unsigned int &, 1> T=int *__w64 , 1> Base=boost::bgl_named_params<void **__w64 ,boost::vertex_predecessor_t,boost::no_property>, 1> DistanceMap=int *__w64 , 1> WeightMap=boost::adj_list_edge_property_map<boost::bidirectional_tag,long double,const long double &,void *,const boost::property<boost::edge_weight_t,slScoreValueType>,boost::edge_weight_t>, 1> IndexMap=boost::adj_list_vertex_property_map<slGraph,unsigned int,const unsigned int &,boost::vertex_index_t>, 1> Params=boost::bgl_named_params<int *__w64 ,boost::vertex_distance_t,boost::bgl_named_params<void **__w64 ,boost::vertex_predecessor_t,boost::no_property>>, 1> ColorMap=boost::detail::error_property_not_found 1> ] 1> c:\probt_slp\work\yasin\test\pc\algopc.cpp(251) : see reference to function template instantiation 'void boost::dijkstra_shortest_paths<slGraph,int*__w64 ,boost::vertex_distance_t,boost::bgl_named_params<T,Tag,Base>>(const VertexListGraph &,void *,const boost::bgl_named_params<int *__w64 ,boost::vertex_distance_t,boost::bgl_named_params<T,Tag,Base>> &)' being compiled 1> with 1> [ 1> T=void **__w64 , 1> Tag=boost::vertex_predecessor_t, 1> Base=boost::no_property, 1> VertexListGraph=slGraph 1> ] 1>c:\probt_slp\boost\include\boost\graph\dijkstra_shortest_paths.hpp(252) : error C2664: 'void put<void*,void*>(T *,ptrdiff_t,const V &)' : cannot convert parameter 2 from 'void *' to 'ptrdiff_t' 1> with 1> [ 1> T=void *, 1> V=void * 1> ] 1> There is no context in which this conversion is possible 1>c:\probt_slp\boost\include\boost\graph\dijkstra_shortest_paths.hpp(255) : error C2664: 'void put<int,DistInf>(T *,ptrdiff_t,const V &)' : cannot convert parameter 2 from 'void *' to 'ptrdiff_t' 1> with 1> [ 1> DistInf=int, 1> T=int, 1> V=int 1> ] 1> There is no context in which this conversion is possible 1>Build log was saved at "file://c:\ProBT_SLP\work\yasin\test\Debug\BuildLog.htm" 1>testPC - 3 error(s), 75 warning(s) ============================================================================================================== I will be thankful to you for your guidance. Regards Amanullah YASIN Master2 (ECD) Ecole Polytechnique Université de Nantes, France. Mob# 06 47 62 89 96 Fix # 02 72 00 26 45 amanyasin(a)gmail.com

2 4

Mixing shared_ptr and regular pointers in containers
by Remko Tronçon 12 Jun '09

12 Jun '09

Hi, This feels like a stupid question, but is there an easy/clean way of mixing shared_ptr<A> and regular A* pointers in one STL container? Boost.Variant comes to mind, but I somehow have the idea that there's a more obvious way and that I'm missing it. thanks, Remko

3 3

C++ Framework Libraries for Programming Popular databases
by biolaser 12 Jun '09

12 Jun '09

I am interested in your recommendation of any open source, cross-platform C++ libraries designed for programming the major databases (Oracle, MySql, Postgres, MS Access, Sybase, etc). Boost does not provide any such database/sql library framework for C++. If you can point me toward a source or sources that do offer such a framework, and possibly one(s) the Boost people favor, it would be very much appreciated. Primarily, I am developing code for Windows and Unix/Linux.

9 8

Spirit: Chset base uint32_t
by Etienne Philip Pretorius 11 Jun '09

11 Jun '09

Hello List, I am trying to define the Char definition in the XML specification and I receive this compiler error: hex escape sequence out of range Here is the relvent code: const static boost::spirit::chset<uint32_t> Char( "\x9\xA\xD\x20-\xD7FF\xE000-\xFFFD\x10000-\x10FFFF" ); Can someone please point me in the right direction to get this working. Thank you, Etienne Pretorius

2 1

shared_ptr binary compatibility
by pcayouette 11 Jun '09

11 Jun '09

Are shared_ptr binary compatible through boost versions? Example: Imagine a "Producer" class that sends shared_ptr to a "Consumer" class. Now imagine an executable that instanciate a Producer and a shared library (.dll or .so) that instanciate a Consumer. The executable is built with boost v1.xx. The shared library is built with boost v1.yy. If xx == yy, obviously there will be no problem since the version of the shared_ptr is the same. However if xx != yy, there might be a problem since the version of the shared_ptr might be binary imcompatible. Thanks, Philippe Cayouette -- View this message in context: http://www.nabble.com/shared_ptr-binary-compatibility-tp23985635p23985635.h… Sent from the Boost - Users mailing list archive at Nabble.com.

2 1

Am I doing something wrong here? Boost threads & intrusive_ptr crash
by Space Ship Traveller 11 Jun '09

11 Jun '09

Hi, I'm using an event loop type system which I've implemented myself. This is due to specific needs. Event loop is fairly simple, it has several types of events: - Timer based events (relative or exact, repeating, etc) - IO based events - Notification based events Notifications are events which can come from any thread, and get processed on in the main loop. Here is the function which is used to post a notification. REF(t) is simply a macro for boost::intrusive_ptr<t>. void Loop::postNotification (REF(INotificationSource) note, bool urgent) { using namespace boost; typedef boost::mutex::scoped_lock scoped_lock; // Lock the event loop notification queue // Add note to the end of the queue // Interrupt event loop thread if urgent // We should probably lock around m_currentThread, it might not be set before we read it..? if (this_thread::get_id() == m_currentThread) { note->processEvents(this, NOTIFICATION); } else { { // Enqueue the notification to be processed scoped_lock lock(m_notifications.lock); m_notifications.sources->push(note); (*) } if (urgent) { // Interrupt event loop thread so that it processes notifications more quickly m_urgentNotificationPipe->notifyEventLoop(); } } } I'm experiencing a very infrequent crash at the line marked with (*). The note is a reference counted pointer (boost::intrusive_ptr), but by the time we get here, this pointer is invalid, even though there are still references to it in the system. The odd thing is, further up the chain (and on the same thread), I'm checking to ensure that note is valid, i.e. //... display update system, separate thread from event-loop. ensure(ctx->notificationSource); loop->postNotification(ctx->notificationSource); //... After writing this far in the email, I'm starting to see something where there could be an error. Is it possible that the object reference count is being messed up due to multi-threading issues? I.e. if the object is being passed around on two separate threads, having the reference count incremented and decremented at the same time? Actually, it seems obvious that this could be a problem... Are there any "patterns" for using reference counted objects across different threads? Any feedback is appreciated. Kind regards, Samuel

3 4

troubles building 1.39.0 with intel compiler under linux
by Frédéric Bron 11 Jun '09

11 Jun '09

Hi, I try to upgrade from 1.38 to 1.39 and have to rewrite my building scripts. For gcc I had no particular issue. But for the intel compiler, it does not work: $ ./bootstrap.sh --without-icu --without-libraries=python --prefix=/soft/bal/usr/icc/boost --with-toolset=intel-linux $ ./bjam --layout=system --libdir=/soft/bal/usr/icc/boost/lib link=static threading=multi runtime-link=shared address-model=64 instruction-set=nocona release install However, I obtain the following error from bjam: error: at /soft/bal/usr/builds/icc/boost_1_39_0/tools/build/v2/build/project.jam:874 error: intel-linux initialization: parameter 'version' inconsistent error: an explicit value was specified in an earlier initialization error: no value is specified now Any clue? Frédéric PS: the content of the automatically generated project-config.jam: import option ; import feature ; if ! intel-linux in [ feature.values <toolset> ] { using intel-linux ; } project : default-build <toolset>intel-linux ; libraries = --without-python ; option.set prefix : /soft/bal/usr/icc/boost ; option.set exec-prefix : /soft/bal/usr/icc/boost ; option.set libdir : /lib ; option.set includedir : /soft/bal/usr/icc/boost/include ;

3 3

Problem with throwing exceptions in async handler functions of ASIO library
by J.W.F. Thirion 11 Jun '09

11 Jun '09

Dear Boost community, We're having a problem using the ASIO class with multiple IO service threads and throwing exceptions inside the handle_xxx functions, as used by the async_xxx functions of the ASIO library. It seems that when any error is thrown in a normal/non-handler function, the try/catch block of the main program is able to catch the error. However, when the handler functions are called (I would assume by the io service, now running in a separate thread), the main function's try/catch blocks never receive the execeptions, and a std::terminate() is called automatically. To demonstrate this, we've taken the HTTP Server 2 example from the ASIO examples page and reduced its complexity. Below are the sources of the example. Basically, to duplicate the problem, run the main executable and then in another terminal, simply "telnet 127.0.0.1 60000" to see the std::terminate() being called, even though there are try/catch blocks in the main function (main.cpp). Here is an output: $ ./main terminate called after throwing an instance of 'int' Aborted $ We've also taken the HTTP Server 2 example "as is" and added a "throw 123;" at the top of handle_accept in server.cpp and a "catch (...)" block in posix_main.cpp. The same issue occurred here, which indicates that the exceptions are not propagated through all the way (maybe because the io service runs in a separate thread). Does anyone have a suggestion on how we can throw exceptions inside the handler functions of the async functions used? We'd like to handle all our errors with custom exception classes (e.g. ExceptionAccept is thrown if there is an error detected in handle_accept, which can then be handled inside the main function of main.cpp). We've compiled the sources below by typing: g++ -I/usr/local/boost/include/boost-1_38 -L/usr/local/boost/lib -lboost_thread-gcc41-mt-1_38 -lboost_system-gcc41-mt-1_38 io_service_pool.cpp server.cpp main.cpp -o main where /usr/local/boost is the local boost installation path. Many thanks in advance! Kind regards, Derik Thirion main.cpp -------- #include <iostream> #include <string> #include <boost/asio.hpp> #include <boost/thread.hpp> #include <boost/bind.hpp> #include <boost/lexical_cast.hpp> #include "server.hpp" #include <pthread.h> #include <signal.h> int main(int argc, char* argv[]) { try { // Block all signals for background thread. sigset_t new_mask; sigfillset(&new_mask); sigset_t old_mask; pthread_sigmask(SIG_BLOCK, &new_mask, &old_mask); server s("127.0.0.1", "60000", 2); // 2 threads boost::thread t(boost::bind(&server::run, &s)); // 2 threads // Restore previous signals. pthread_sigmask(SIG_SETMASK, &old_mask, 0); // Wait for signal indicating time to shut down. sigset_t wait_mask; sigemptyset(&wait_mask); sigaddset(&wait_mask, SIGINT); sigaddset(&wait_mask, SIGQUIT); sigaddset(&wait_mask, SIGTERM); pthread_sigmask(SIG_BLOCK, &wait_mask, 0); int sig = 0; sigwait(&wait_mask, &sig); s.stop(); t.join(); } catch (std::exception& e) { std::cerr << "exception: " << e.what() << "\n"; } catch (...) { std::cerr << "all exception" << "\n"; } return 0; } server.hpp ---------- #ifndef SERVER_HPP #define SERVER_HPP #include <boost/asio.hpp> #include <string> #include <vector> #include <boost/noncopyable.hpp> #include <boost/shared_ptr.hpp> #include "io_service_pool.hpp" /// The top-level class of the HTTP server. class server : private boost::noncopyable { public: /// Construct the server to listen on the specified TCP address and port, and /// serve up files from the given directory. explicit server(const std::string& address, const std::string& port, std::size_t io_service_pool_size); /// Run the server's io_service loop. void run(); /// Stop the server. void stop(); private: /// Handle completion of an asynchronous accept operation. void handle_accept(const boost::system::error_code& e); /// The pool of io_service objects used to perform asynchronous operations. io_service_pool io_service_pool_; /// Acceptor used to listen for incoming connections. boost::asio::ip::tcp::acceptor acceptor_; }; #endif // SERVER_HPP server.cpp ---------- #include "server.hpp" #include <boost/bind.hpp> server::server(const std::string& address, const std::string& port, std::size_t io_service_pool_size) : io_service_pool_(io_service_pool_size), acceptor_(io_service_pool_.get_io_service()) { // Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR). boost::asio::ip::tcp::resolver resolver(acceptor_.io_service()); boost::asio::ip::tcp::resolver::query query(address, port); boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query); acceptor_.open(endpoint.protocol()); acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true)); acceptor_.bind(endpoint); acceptor_.listen(); acceptor_.async_accept(*(new boost::asio::ip::tcp::socket(io_service_pool_.get_io_service())), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error)); } void server::run() { io_service_pool_.run(); } void server::stop() { io_service_pool_.stop(); } void server::handle_accept(const boost::system::error_code& e) { throw 123; // this one never gets caught in main // instead std::terminate() gets called } io_service_pool.cpp ------------------- #include <stdexcept> #include <boost/thread.hpp> #include <boost/bind.hpp> #include <boost/shared_ptr.hpp> #include "io_service_pool.hpp" io_service_pool::io_service_pool(std::size_t pool_size) : next_io_service_(0) { if (pool_size == 0) throw std::runtime_error("io_service_pool size is 0"); // Give all the io_services work to do so that their run() functions will not // exit until they are explicitly stopped. for (std::size_t i = 0; i < pool_size; ++i) { io_service_ptr io_service(new boost::asio::io_service); work_ptr work(new boost::asio::io_service::work(*io_service)); io_services_.push_back(io_service); work_.push_back(work); } } void io_service_pool::run() { // Create a pool of threads to run all of the io_services. std::vector<boost::shared_ptr<boost::thread> > threads; for (std::size_t i = 0; i < io_services_.size(); ++i) { boost::shared_ptr<boost::thread> thread(new boost::thread( boost::bind(&boost::asio::io_service::run, io_services_[i]))); threads.push_back(thread); } // Wait for all threads in the pool to exit. for (std::size_t i = 0; i < threads.size(); ++i) threads[i]->join(); } void io_service_pool::stop() { // Explicitly stop all io_services. for (std::size_t i = 0; i < io_services_.size(); ++i) io_services_[i]->stop(); } boost::asio::io_service& io_service_pool::get_io_service() { // Use a round-robin scheme to choose the next io_service to use. boost::asio::io_service& io_service = *io_services_[next_io_service_]; ++next_io_service_; if (next_io_service_ == io_services_.size()) next_io_service_ = 0; return io_service; } io_service_pool.hpp: -------------------- #ifndef IO_SERVICE_POOL_HPP #define IO_SERVICE_POOL_HPP #include <boost/asio.hpp> #include <vector> #include <boost/noncopyable.hpp> #include <boost/shared_ptr.hpp> /// A pool of io_service objects. class io_service_pool : private boost::noncopyable { public: /// Construct the io_service pool. explicit io_service_pool(std::size_t pool_size); /// Run all io_service objects in the pool. void run(); /// Stop all io_service objects in the pool. void stop(); /// Get an io_service to use. boost::asio::io_service& get_io_service(); private: typedef boost::shared_ptr<boost::asio::io_service> io_service_ptr; typedef boost::shared_ptr<boost::asio::io_service::work> work_ptr; /// The pool of io_services. std::vector<io_service_ptr> io_services_; /// The work that keeps the io_services running. std::vector<work_ptr> work_; /// The next io_service to use for a connection. std::size_t next_io_service_; }; #endif // IO_SERVICE_POOL_HPP

3 4

boost::test test case levels
by Anatoli Sakhnik 11 Jun '09

11 Jun '09

Hi there! Our automatic tests are of two kinds: short (just like BOOST_CHECK_EQUAL(2*2, 4);), and complicated, which process bulks of random data (for instance, to check if a map with random numbers is always sorted). So we’d like to select which test cases to run: either simple ones or all. I see two ways: 1. Default variants release, debug build and run only simple test cases. We define another feature (or even a build variant) that builds and runs all the tests. This will require additional build efforts, and we’d like to select test cases in run-time. 2. We try to get use of --run_test=??? and test case name mangling. This is a hack, of course. Is there another way to select test cases in run-time? — Anatoli

2 1

[Boost.Thread] Join not waiting?
by James Auger 11 Jun '09

11 Jun '09

This is my first time working with Boost.Thread and I'm having some difficulty in that Join does not seem to work (obviously I'm doing something wrong). In a nutshell what I'm doing is: Instantiating the Example class (which has a boost::thread as a member variable) calling Example::run() (which starts the thread) do some stuff (both in main and in the thread) calling Example::terminate() (which sets the condition for the thread function to stop, and calls Join) end. The problem is that Join returns instantly, before the thread has finished. In the code below I've commented out the stop condition (making the thread run an infinite loop) to demonstrate that it keeps running after join returns. By my understanding of how boost threads and join works, this is not the correct behavior; my understanding is that the call to join should not return until the thread has stopped running. Either my understanding is wrong, or my code to make that happen is wrong. Can you guys help me? The example is stripped down/simplified code that I wrote to demonstrate and test what was going on in my actual program. Example Output: --- thread: main: 00 thread: main: 11 thread: main: 22 thread: main: 33 main: thread: 44 main: After Terminate thread: 5 thread: 6 thread: 7 thread: 8 --- Note the interleaved output 0 - 4, that's expected and fine. The problem is the thread is still running (as evidenced by writing to cout) after terminate() (and thus join()) has been called on that thread. Example Code: --- #include <iostream> #include <boost/thread/thread.hpp> #include <boost/thread/mutex.hpp> #include <boost/bind.hpp> class Example { public: Example() { flag = 0; }; void run() { flag = 1; boost::thread _myThread(boost::bind(&Example::threadLoop, this)); }; void terminate() { //flag = 3; //commented out stop condition _myThread.join(); }; private: void threadLoop() { flag = 2; for(int i = 0; flag == 2; i++) { boost::this_thread::sleep(boost::posix_time::seconds(1)); std::cout<<"thread: "<<i<<std::endl; } flag = 4; }; boost::thread _myThread; int flag; }; int main() { Example anExample; anExample.run(); for(int i = 0; i < 5; i++) { boost::this_thread::sleep(boost::posix_time::seconds(1)); std::cout<<"main: "<<i<<std::endl; } anExample.terminate(); std::cout<<"main: After Terminate"<<std::endl; boost::this_thread::sleep(boost::posix_time::seconds(5)); //sleep so we can see the thread still outputing return 0; } --- Thanks!

3 3

size of serialized ptime object?
by Archie14 11 Jun '09

11 Jun '09

when serializing ptime without using any custom facets, just by using >> or << : how to find the size of the serialized data? Seems to me that sizeof(ptime) should not return the proper value of serialized object size.

1 0

serializing ptr_map results in compiler error C2039
by Faheemullah Memon 11 Jun '09

11 Jun '09

I have some code that I want to build. The code uses boost::ptr_map class to serialize certain objects. I have Visual Studio 2008 with boost1.38 and I am getting following error from compiler. I wonder if any one else has seen any thing like this. C2039: 'serialize' : is not a member of 'boost::ptr_map<Key,T>' Looks like some reference is missing and I wonder what it is, I don't see any boost/serialization/ptr_map. I have Googled a lot and nothing has proved to be viable. I have created a sample code that generates the same error below #include <fstream> #include <iostream> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/config.hpp> #include <boost/shared_ptr.hpp> #include <boost/ptr_container/ptr_map.hpp> #include <boost/serialization/string.hpp> #include <boost/serialization/version.hpp> #include <boost/serialization/split_member.hpp> using namespace std; class User { boost::ptr_map<std::string, string> ptrmap; public: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & ptrmap; } bool save(const std::string& filename) { ofstream ofs(filename.c_str()); if(ofs.good() == false) { return false; } try { boost::archive::text_oarchive oa(ofs); oa << (*this); } catch(...) { throw; } return true; } }; int main() { User user; user.save("C:\\test.db"); return EXIT_SUCCESS; } Any help is appreciated. faheemitian

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Re: [Boost-users] [Boost.CircularBuffer] begin()/end() arithmetic not working out quite right
by Jan Gaspar 11 Jun '09

11 Jun '09

Hi David, you just cannot rely on this. I don't think standard says anything about begin() moving forward after push_back(). Correct me if I'm wrong. The way how it is implemented is that if the circular_buffer is empty begin() returns the same iterator as end(). There is also a note about iterator invalidation for push_back(): "Does not invalidate any iterators with the exception of iterators pointing to the overwritten element." It means iterator 'a' in your first example will point to the same element as it was before calling push_back() - which is end(). This explains the behaviour you are describing. Regards, Jan ----- Original Message ---- From: David Baird <dhbaird(a)gmail.com> To: Jan Gaspar <jano_gaspar(a)yahoo.com>; boost-users(a)lists.boost.org Sent: Thursday, 11 June, 2009 1:01:54 Subject: [Boost.CircularBuffer] begin()/end() arithmetic not working out quite right Hi, Firstly, thanks for the work on a circular buffer. This is very useful since many of my applications require it. I am having a problem though... I am using Boost 1.38.0. When I call push_back(), the iterator math makes it appear that begin() moves backwards and end() remains constant. (Based on other STL libraries, I expect that begin() will remain constant and end() will keep advancing as I call push_back()). In other words, this assertion fails (but I expect it to succeed): circular_buffer<int> buf(8); circular_buffer<int>::iterator a; circular_buffer<int>::iterator b; a = buf.begin(); buf.push_back(1); b = buf.begin(); assert(a == b); // Fails!! Also, this code fails too (but I expect it to succeed): circular_buffer<int> buf(8); circular_buffer<int>::iterator a; circular_buffer<int>::iterator b; a = buf.end(); buf.push_back(1); b = buf.end(); assert(a != b); // Also fails! Below is a full example that you can compile and try out: #include <boost/circular_buffer.hpp> #include <stdio.h> int main () { typedef boost::circular_buffer<int> buf_type; // Instead of "end" moving ahead, "begin" is moving backwards when // // using "push_back". { buf_type buf1(1024); buf_type::iterator a; buf_type::iterator b; a = buf1.end(); buf1.push_back(1); buf1.push_back(2); b = buf1.end(); printf ("%d\n", a == b); // >>> // got: 1 // expected: 0 printf ("%d, %d\n", a-buf1.begin(), b-buf1.begin()); // >>> // got: 2, 2 // expected: 0, 2 } { buf_type buf2(1024); buf_type::iterator c; buf_type::iterator d; c = buf2.begin(); buf2.push_back(1); buf2.push_back(2); d = buf2.begin(); printf ("%d\n", c == d); // >>> // got: 0 // expected: 1 // (i.e. "begin()" is not still pointing to first item!! // This is incorrect, isn't it?) printf ("%d, %d\n", buf2.end()-c, buf2.end()-d); // >>> // got: 0, 2 // expected: 2, 2 } return 0; } Thanks, David

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[MPI] Derived class not properly registered, even if it is.
by Mathieu Larose 11 Jun '09

11 Jun '09

Hi, I'm using MPI and I've come to an strange assertion fail from the library and I was wondering if it was "normal". Here is the code. I've got three files: header.hpp main.cpp other.cpp - - - - - - - - header.cpp - - - - - - - - #ifndef HEADER_HPP #define HEADER_HPP #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> // Abstract class A { friend class boost::serialization::access; template <class Archive> void serialize(Archive & ar, const unsigned int version) {} public: virtual void foo() = 0; }; class B : public A { friend class boost::serialization::access; template <class Archive> void serialize(Archive & ar, const unsigned int version) { ar & boost::serialization::base_object<A>(*this); } public: void foo() {} }; #endif - - - - - - - - main.cpp - - - - - - - - #include <iostream> #include <boost/mpi.hpp> #include "header.hpp" // #include <boost/serialization/export.hpp> // BOOST_CLASS_EXPORT(B); int main(int argc, char * argv[]) { boost::mpi::environment env(argc, argv); boost::mpi::communicator world; if (world.rank() == 0) { A * a = new B; world.send(1,0,a); std::cout << "sent" << std::endl; } } - - - - - - - - other.cpp - - - - - - - - #include "header.hpp" #include <boost/serialization/export.hpp> BOOST_CLASS_EXPORT(B); If I run this code I've got this assertion fail: a.out: ./boost/archive/impl/archive_pointer_oserializer.ipp:64: static const boost::archive::detail::basic_pointer_oserializer* boost::archive::detail::archive_pointer_oserializer<Archive>::find(const boost::serialization::extended_type_info&) [with Archive = boost::mpi::packed_oarchive]: Assertion `it != boost::serialization::singleton< oserializer_map<Archive> >::get_const_instance().end()' failed. I realized that if I uncomment these lines in main.cpp: #include <boost/serialization/export.hpp> BOOST_CLASS_EXPORT(B); My code runs correctly. It seems that BOOST_CLASS_EXPORT needs to be in the same .cpp file (i.e main.cpp) where MPI is used. When using serialization only, BOOST_CLASS_EXPORT could be in any .cpp files. Is this normal? Also, if A is no more an abstract class, BOOST_CLASS_EXPORT(B); could be called from other.cpp and the code runs correctly. I'm using version 1.39.0. Thank you, Mathieu Larose

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[conversion] Using Lexical_cast to convert string to float
by Ryan McConnehey 11 Jun '09

11 Jun '09

In writing some unit tests to convert strings to floats I've come across a puzzling situation. I was trying to test that a std::bad_cast was thrown if a number was too large to fit into a float. The error wasn't thrown but the float was given 1.#INF000. The work around I used was to cast to a double and then do a numeric_cast on the result. This provided an exception for values larger than could fit in a float. Lexical_cast on a double though works as I would have expected. If a value is too large to fit into a double then a std::bad_cast is called. float test = boost::lexical_cast<float>("3.4e050"); //test will have the value of 1.#INF000 float test = boost::numeric_cast<float>( boost::lexical_cast<double>("3.4e50"); //std::bad_cast is thrown double test = boost::lexical_cast<double>("3.4e350"); //std::bad_cast is thrown Is the lexical_cast for float behaving correctly? Ryan P.S. This code is using boost 1.38.0

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[Boost.CircularBuffer] begin()/end() arithmetic not working out quite right
by David Baird 10 Jun '09

10 Jun '09

Hi, Firstly, thanks for the work on a circular buffer. This is very useful since many of my applications require it. I am having a problem though... I am using Boost 1.38.0. When I call push_back(), the iterator math makes it appear that begin() moves backwards and end() remains constant. (Based on other STL libraries, I expect that begin() will remain constant and end() will keep advancing as I call push_back()). In other words, this assertion fails (but I expect it to succeed): circular_buffer<int> buf(8); circular_buffer<int>::iterator a; circular_buffer<int>::iterator b; a = buf.begin(); buf.push_back(1); b = buf.begin(); assert(a == b); // Fails!! Also, this code fails too (but I expect it to succeed): circular_buffer<int> buf(8); circular_buffer<int>::iterator a; circular_buffer<int>::iterator b; a = buf.end(); buf.push_back(1); b = buf.end(); assert(a != b); // Also fails! Below is a full example that you can compile and try out: #include <boost/circular_buffer.hpp> #include <stdio.h> int main () { typedef boost::circular_buffer<int> buf_type; // Instead of "end" moving ahead, "begin" is moving backwards when // // using "push_back". { buf_type buf1(1024); buf_type::iterator a; buf_type::iterator b; a = buf1.end(); buf1.push_back(1); buf1.push_back(2); b = buf1.end(); printf ("%d\n", a == b); // >>> // got: 1 // expected: 0 printf ("%d, %d\n", a-buf1.begin(), b-buf1.begin()); // >>> // got: 2, 2 // expected: 0, 2 } { buf_type buf2(1024); buf_type::iterator c; buf_type::iterator d; c = buf2.begin(); buf2.push_back(1); buf2.push_back(2); d = buf2.begin(); printf ("%d\n", c == d); // >>> // got: 0 // expected: 1 // (i.e. "begin()" is not still pointing to first item!! // This is incorrect, isn't it?) printf ("%d, %d\n", buf2.end()-c, buf2.end()-d); // >>> // got: 0, 2 // expected: 2, 2 } return 0; } Thanks, David

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boost::multi_array SWIG binding
by NJ Duncan 10 Jun '09

10 Jun '09

Hi all, I'm fairly new to C++ and learning as I go, but there is very little info out there on my particular problem. I am trying to turn a model I've written in C++ into a python module using SWIG. The main problems I'm having are initializing Boost multiarray containers then getting data into and out of them. Here is some sample code: #include <iostream> #include <vector> #include <algorithm> #include "boost/multi_array.hpp" typedef boost::multi_array<double,2> array_typef; typedef boost::multi_array<int,2> array_typei; class G2G_hydro_model { public: array_typei A; array_typef S; G2G_hydro_model(int A_ncols,int A_nrows,int S_ncols,int S_nrows):, A(boost::extents[A_ncols][A_nrows]), S(boost::extents[S_ncols][S_nrows]) {}; ~G2G_hydro_model(void) {}; void read_floating(int x, int y, array_typef& data, double& element); void write_floating(int x, int y, array_typef& data, double& element); void write_integer(int x, int y, array_typei& data, int& element); void functions_to_do_stuff(array_typef&,array_typei&) }; void G2G_hydro_model::read_floating(int x, int y, array_typef data, double element) {element = data[x][y];} void G2G_hydro_model::write_floating(int x, int y, double element, array_typef data) {data[x][y] = element;} void G2G_hydro_model::write_integer(int x, int y, int element, array_typei data) {data[x][y] = element;} Code is pushed through SWIG to create bindings, then compiled as a linked library. Compiles ok with no warnings and Python accepts the module. But when I try to use with Python code like this: import sys import numpy as np import G2G h = G2G4.G2G_hydro_model(A.cols,A.nrows,S.cols,S.rows) element = 9 for x in range(0,A.cols) for y in range(0,A.rows) h.write_integer(x, y, element, h.A) Unfortunately I get the following error message: python: /usr/include/boost/multi_array/multi_array_ref.hpp:481: boost::multi_array_ref<T, NumDims>& boost::multi_array_ref<T, NumDims>::operator=(const ConstMultiArray&) [with ConstMultiArray = boost::multi_array<double, 2ul, std::allocator<double> >, T = double, long unsigned int NumDims = 2ul]: Assertion `std::equal(other.shape(), other.shape()+this->num_dimensions(), this->shape())' failed. I think I have assigned the array extents incorrectly, but I'm not sure of the proper way to do this as part of a C++ class. Any ideas, I'm starting to pull my hair out, I hope there is a simple answer. Many Thanks Niall -- __________________________________________________________________ Niall Duncan, Postgraduate Student Institute for Energy Systems, School of Engineering and Electronics The University of Edinburgh www.see.ed.ac.uk -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

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[Intrusive] safe_link assertion with list
by Pearl Rothman 10 Jun '09

10 Jun '09

I am using Fedora 9, gcc 4.3.0, and boost 1.38.0. I get the following error when calling the destroyMessage function. boost/intrusive/detail/utilities.hpp:421: void boost::intrusive::detail::destructor_impl(Hook&, boost::intrusive::detail::link_dispatch<safe_link>) [with Hook = boost::intrusive::detail::generic_hook<boost::intrusive::get_list_node_algo<void*>, boost::intrusive::default_tag, safe_link, 1>]: Assertion `!hook.is_linked()' failed. class MessageHook : public boost::intrusive::list_base_hook<>{ public: MessageHook(Message* msg) : m_msg(msg) {}; Message* GetMsg() { return m_msg; } private: Message* m_msg; }; class MessageFactory { public: MessageFactory() { } ~MessageFactory() { } ... virtual void destroyMessage( Message* msg ) { MessageHook hook(msg); m_message_list.push_back( hook ); } private: boost::intrusive::list<stockTraderMessageHook> m_message_list; }; Thanks

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[Boost.Graph]: read_graphviz into std::vector
by Sascha Winter 10 Jun '09

10 Jun '09

Hi, I have graphes in the .dot format, with 24 vertex labels d1-d24, each storing one double. I want to use struct Vertex_p { std::string node_id; std::vector<double> d; } as the bundled property for my graph in boost and use read_graphviz to load the graph. How do I have to construct the property_map and the dynamic_properties? This property_map<graph_t, vector<double> Vertex_p::*>::type g_d = get(&Vertex_p::d, graph); g_dp.property("d",g_d); does not work. Is it even possible to do something like this? Thanks for any help, Sascha

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Problem in returning value from DFS vistor class.
by Amanullah Yasin 10 Jun '09

10 Jun '09

Bonjour,Dear all I am facing general programming related logical error. I want to access bolean variable of the class by using get method. but it is not giving the right result. When i read the counter and boolean variable by getcount() and isPathExist() methods. Each time it returns "0" for counter and false for boolean. My code is below #include "AlgoPC.h"#include <boost/graph/depth_first_search.hpp> //=============================Depth First Search===========================class DFSVisitor: public default_dfs_visitor {protected: slBayesianNetwork *pBN; int nodeA, nodeC; bool exist; int counter; public: DFSVisitor(slBayesianNetwork *pBN, int nodeA, int nodeC); ~DFSVisitor(); void discover_vertex(slNode u, const slGraph &g); void resetCounter(); bool isPathExist(); int getCounter(); };//-------------------------------------------------------------------------- DFSVisitor::DFSVisitor(slBayesianNetwork *pBN, int nodeA, int nodeC) { this->pBN = pBN; this->nodeA = nodeA; this->nodeC = nodeC; this->exist = false; this->resetCounter(); }//-------------------------------------------------------------------------- DFSVisitor::~DFSVisitor() { }//--------------------------------------------------------------------------void DFSVisitor::resetCounter() { this->counter = 0; }//-------------------------------------------------------------------------- //--------------------------------------------------------------------------void DFSVisitor::discover_vertex(slNode u, const slGraph &g) { this->counter++; unsigned int varIdx = this->pBN->getVariableIndex(u); if ((varIdx == this->nodeC ) && ((this->counter) > 2)) { this->exist = true; cout<<"\n "<<counter<<" node = "<< varIdx+1; } }//--------------------------------------------------------------------------int DFSVisitor::getCounter() { return this->counter; }//--------------------------------------------------------------------------bool DFSVisitor::isPathExist() { return this->exist; } ====================== main program ======================= cout<< "\n a = "<<a<<" c = "<<c; DFSVisitor vis(this->pBN, a , c); depth_first_search((slGraph&)this->pBN->get_graph(),visitor(vis).root_vertex(vertex(a, this->pBN->get_graph()))); cout<<"\n counter is = "<<vis.getCounter()<<" Path exist = "<< vis.isPathExist(); ======================== out put ========================= counter is = 0 path exist = 0 (false) ------------------------------------------------------- I will be thankful to you for guiding me. Best Regards Amanullah YASIN Master2 (ECD) Ecole Polytechnique Université de Nantes, France. Mob# 06 47 62 89 96 Fix # 02 72 00 26 45 amanyasin(a)gmail.com

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Obtaining base class type
by Robert Dailey 09 Jun '09

09 Jun '09

Hey everyone, I'm using wxWidgets, and as you all may know they have a silly macro used to define an event table... BEGIN_EVENT_TABLE( MainWindow, wxFrame ) EVT_CLOSE( MainWindow::OnClose ) END_EVENT_TABLE() I spend a few hours finding out that wxFrame is the incorrect parameter for parameter #2. This is not the base class that MainWindow derives from. There was no compiler error or warning, nor any errors during runtime. Only weird behavior because events were getting skipped. Because of this error-proneness, I'm looking for a way to have boost help me out with this. I'm looking for a metafunction in Boost that can be used to obtain (at compile time) the base type of MainWindow. For example: BEGIN_EVENT_TABLE( MainWindow, boost::get_base_of<MainWindow>::type ) EVT_CLOSE( MainWindow::OnClose ) END_EVENT_TABLE() Something like that above. I know that type traits has is_base_of, and I'm hoping there is a get version of that too. I've browsed through the reference but I've found nothing helpful.

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