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serialisation use of asserts versus throw ?
by Avi Bahra 06 Sep '12

06 Sep '12

This is question about use of asserts in boost serialisation. As a program migrates from one release to another the api changes. This is expected. In my case I have client/server that uses boost serialisation. I was expecting an throw due to the incompatibility not a an assert. The assert crashes my client, giving no chance for recovery, and informing the user that they are using previous out of date release/server. In may case: boost_iarchive.cpp inline const basic_pointer_iserializer * … [View More]

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Boost.Variant: Infinite recursion in constructor
by Markus Lenger 06 Sep '12

06 Sep '12

Hi! I face a problem using Boost.Variant 1.48 under Windows with Cygwin and g++ (GCC) 4.5.3. The following code crashes due to infinite recursion in the constructor of a_t: #include <boost/variant.hpp> #include <iostream> struct a_t { boost::variant< boost::recursive_wrapper<a_t>,int > child; }; int main() { a_t a; std::cout << "OK" << std::endl; return 0; } If I change the type of "child" to "boost::variant< int, boost::… [View More]

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boost dijkstra : retrieve the whole path
by Viviane Parent 06 Sep '12

06 Sep '12

Hello people I'm stubbling on a very stupid problem I think, but I can't find any hint about it. I'm using the boost algorithm dijkstra_shortest_path and I simply want to know how to retrieve all the steps the algo goes through for the shortest path found. To illustrate : I'm glad to know that to go from A to Z, the minimal cost is 26, but I would like also to know that this path goes from A to B then from B to C etc. I used the example http://www.boost.org/doc/libs/1_51 [...] ample.cpp<… [View More]

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Strange linker error
by John M. Dlugosz 06 Sep '12

06 Sep '12

On a Mac, I'm getting a strange linker error, Duplicate symbol typeinfo name for boost::tag_original_exception_type* (in two .o files). Now I only see that name used once in the boost source code, in exception/detail/exception_ptr.hpp, and don't see how it could mean different things in different translation units. Any clue what that's about? —John

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Using a binomial_heap with indirect_cmp
by David Doria 05 Sep '12

05 Sep '12

I am trying to keep a heap sorted by values in a property map. I tried the code below, but the compiler does not like my arguments to the heap constructor (PriorityQueueType pq(indirectComparison);). According to the documentation (http://www.boost.org/doc/libs/1_51_0/doc/html/boost/heap/binomial_heap.html) there is a constructor: explicit binomial_heap(value_compare const & = value_compare()); that takes a value_compare, which I was thinking would of type IndirectComparisonType that I … [View More]

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Problems in boost/mpl/aux_/template_arity.hpp when BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS is defined on g++ 4.6.3 and boost 1.50
by Alach 05 Sep '12

05 Sep '12

Hi, Please help. I have encountered a problem on gcc 4.6.3 and boost 1.50 when trying to compile my library with extensive usage of boost::mpl and boost::fusion on gcc. It was required to enable customization of the number of template arguments handled by boost::fusion and boost::mpl containers and mpl meta functions. Not surprisingly the code compiles fine in visual studio 2010. whole code can be found here: svn checkout svn://svn.code.sf.net/p/d-injection/code-0/trunk This is how I have … [View More]altered template arguments count: #define FUSION_MAX_VECTOR_SIZE DI_MAX_NUM_INJECTIONS #define FUSION_MAX_VECTOR_SIZE DI_MAX_NUM_INJECTIONS #define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #define BOOST_MPL_LIMIT_VECTOR_SIZE DI_MAX_NUM_INJECTIONS #define BOOST_MPL_LIMIT_SET_SIZE DI_MAX_NUM_INJECTIONS #define BOOST_MPL_LIMIT_METAFUNCTION_ARITY DI_MAX_NUM_INJECTIONS #include <boost/fusion/include/as_vector.hpp> #include <boost/fusion/include/as_set.hpp> #include <boost/fusion/adapted/mpl.hpp> #include <boost/fusion/include/mpl.hpp> #include <boost/fusion/include/for_each.hpp> #include <boost/fusion/include/at_key.hpp> #include <boost/mpl/vector.hpp> #include <boost/mpl/remove.hpp> #include <boost/mpl/inserter.hpp> #include <boost/mpl/transform.hpp> #include <boost/mpl/insert.hpp> #include <boost/mpl/count.hpp> #include <boost/mpl/copy.hpp> #include <boost/mpl/set.hpp> #include <boost/mpl/inherit.hpp> #include <boost/mpl/joint_view.hpp> #include <boost/mpl/contains.hpp> #include <boost/mpl/size.hpp> #undef FUSION_MAX_VECTOR_SIZE #undef FUSION_MAX_SET_SIZE #undef BOOST_MPL_LIMIT_VECTOR_SIZE #undef BOOST_MPL_LIMIT_SET_SIZE #undef BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #undef BOOST_MPL_LIMIT_METAFUNCTION_ARITY And I get this error: In file included from ../../libraries/boost_1_50_0/boost/mpl/aux_/full_lambda.hpp:29:0, from ../../libraries/boost_1_50_0/boost/mpl/lambda.hpp:22, from ../../libraries/boost_1_50_0/boost/mpl/apply.hpp:25, from ../../libraries/boost_1_50_0/boost/mpl/aux_/fold_impl.hpp:19, from ../../libraries/boost_1_50_0/boost/mpl/fold.hpp:20, from ../../libraries/boost_1_50_0/boost/fusion/sequence/intrinsic/detail/segmented_size.hpp:12, from ../../libraries/boost_1_50_0/boost/fusion/sequence/intrinsic/size.hpp:16, from ../../libraries/boost_1_50_0/boost/fusion/view/joint_view/joint_view.hpp:15, from ../../libraries/boost_1_50_0/boost/fusion/algorithm/transformation/push_back.hpp:11, from ../../libraries/boost_1_50_0/boost/fusion/view/iterator_range/detail/segmented_iterator_range.hpp:19, from ../../libraries/boost_1_50_0/boost/fusion/view/iterator_range/detail/segments_impl.hpp:13, from ../../libraries/boost_1_50_0/boost/fusion/view/iterator_range/iterator_range.hpp:21, from ../../libraries/boost_1_50_0/boost/fusion/view/iterator_range.hpp:10, from ../../libraries/boost_1_50_0/boost/fusion/sequence/intrinsic/detail/segmented_begin.hpp:12, from ../../libraries/boost_1_50_0/boost/fusion/sequence/intrinsic/begin.hpp:17, from ../../libraries/boost_1_50_0/boost/fusion/container/vector/vector10.hpp:15, from ../../libraries/boost_1_50_0/boost/fusion/container/vector/vector_fwd.hpp:14, from ../../libraries/boost_1_50_0/boost/fusion/container/vector/vector.hpp:10, from ../../libraries/boost_1_50_0/boost/fusion/container/vector/detail/as_vector.hpp:18, from ../../libraries/boost_1_50_0/boost/fusion/container/vector/convert.hpp:10, from ../../libraries/boost_1_50_0/boost/fusion/include/as_vector.hpp:10, from ./di/detail/variadics.hpp:42, from ./di/subject.hpp:10, from test/abstract_builder_should.hpp:11, from test/main.cpp:6: ../../libraries/boost_1_50_0/boost/mpl/aux_/template_arity.hpp:86:1: error: macro "BOOST_PP_TUPLE_ELEM_E_2" requires 2 arguments, but only 1 given ../../libraries/boost_1_50_0/boost/mpl/aux_/template_arity.hpp:86:1: error: macro "BOOST_PP_SEQ_ELEM_III" requires 2 arguments, but only 1 given ../../libraries/boost_1_50_0/boost/mpl/aux_/template_arity.hpp:86:1: error: macro "BOOST_PP_SEQ_ELEM_III" requires 2 arguments, but only 1 given There are more of course, but the consensus is that all errors are somewhat connected to BOOST_PP_ macros. I've tried to find the reason, but with no luck. Thank you in advance, Adam. -- View this message in context: http://boost.2283326.n4.nabble.com/Problems-in-boost-mpl-aux-template-arity… Sent from the Boost - Users mailing list archive at Nabble.com. [View Less]

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[mpi] linking MPI with MPICH2 under Cygwin
by Murphy, John T. 05 Sep '12

05 Sep '12

Hello, I'm getting a very consistent problem trying to link with the Boost.MPI library and MPICH2 under Cygwin. What seems to be happening is that the libboost_mpi library that is created contains redundant copies of elements from the MPI libraries. For example: It is possible to add debugging code to MPICH2 source code, build MPICH2, build Boost's mpi library against this, then compile, link, and run an executable, with the result that the debugging code is output from the MPICH functions. … [View More]

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BGL: d_ary_heap_indirect duplicated values
by David Doria 05 Sep '12

05 Sep '12

I am using a d_ary_heap_indirect as a priority queue using a property map to store the priorities. However, I when I change the values in the priority property map and push vertices that are already in the queue into the queue again, it results in kind of an invalid state where the vertex appears in the queue twice at different positions. Here is a demo: http://programmingexamples.net/wiki/CPP/Boost/BGL/IndirectPriorityQueue It simply sets random priority values for every vertex, and pushes … [View More]

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asio: question regarding design
by Goran 05 Sep '12

05 Sep '12

Hi all, I wanna change the design of some async client (code at end of this message) towards something like "run as a server and pull a message from another server". The so called "another server" will be my master server in future. At the moment I'm taking some example from asio's documentation: http://www.boost.org/doc/libs/1_46_1/doc/html/boost_asio/tutorial/tutdaytim… The async client is derived from another example of asio's documentation: http://www.boost.org/doc/libs/1_46_1/doc/html/… [View More]boost_asio/example/http/clien… My simple question is: How would you change the code below to run in a loop and pulls 'let's say' every second a message from master server? Thanks a lot! #include <iostream> #include <istream> #include <ostream> #include <string> #include <boost/asio.hpp> #include <boost/bind.hpp> using boost::asio::ip::tcp; class client { public: client(boost::asio::io_service& io_service, const std::string& server, const std::string& port) : resolver_(io_service), socket_(io_service) { // Start an asynchronous resolve to translate the server and service names // into a list of endpoints. tcp::resolver::query query(server, port); resolver_.async_resolve(query, boost::bind(&client::handle_resolve, this, boost::asio::placeholders::error, boost::asio::placeholders::iterator)); } private: void handle_resolve(const boost::system::error_code& err, tcp::resolver::iterator endpoint_iterator) { if (!err) { // Attempt a connection to each endpoint in the list until we // successfully establish a connection. tcp::endpoint endpoint = *endpoint_iterator; socket_.async_connect(endpoint, boost::bind(&client::handle_connect, this, boost::asio::placeholders::error)); } else { std::cout << "Error: " << err.message() << "\n"; } } void handle_connect(const boost::system::error_code& err) { if (!err) { // The connection was successful. Read the response. boost::asio::async_read(socket_, response_, boost::bind(&client::handle_response, this)); } else if (err != boost::asio::error::eof) { std::cout << "Error: " << err.message() << "\n"; } } void handle_response() { if (response_.size() > 0) std::cout << "Response: " << &response_; else std::cout << "Response is empty." << std::endl; } tcp::resolver resolver_; tcp::socket socket_; boost::asio::streambuf request_; boost::asio::streambuf response_; }; int main(int argc, char* argv[]) { try { if (argc != 3) { std::cout << "Usage: async_client <server> <port>\n"; std::cout << "Example:\n"; std::cout << " async_client localhost 2020\n"; return 1; } boost::asio::io_service io_service; client c(io_service, argv[1], argv[2]); io_service.run(); } catch (std::exception& e) { std::cout << "Exception: " << e.what() << "\n"; } return 0; } [View Less]

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Re: [Boost-users] compilation problems with thread/chrono & boost 1.51 & HPUX
by Avi Bahra 05 Sep '12

05 Sep '12

>Le 04/09/12 11:44, Avi Bahra a ?crit : >>>> On 3.9.2012. 10:26, Avi Bahra wrote: >>>>> Can any one suggest *any* hacks/workarounds that gets me pass these errors. >>>>> Is it possible to use gcc on HPUX with boost 1.51 ? >>>> The docs for boost thread 1.51 say this: >>>> >>>> Boost.Thread uses by default Boost.Chrono for the time related >>>> functions. For backward compatibility and also for compilers … [View More]that don't >>>> work well with Boost.Chrono the user can define >>>> BOOST_THREAD_DONT_USE_CHRONO. If BOOST_THREAD_DONT_USE_SYSTEM is defined >>>> then BOOST_THREAD_DONT_USE_CHRONO is defined implicitly. >>>> >>>> BOOST_THREAD_USES_CHRONO is defined when Boost.Thread uses Boost.Chrono. >> I have already tried BOOST_THREAD_DONT_USE_CHRONO and it has no effect. >> It appears that some of headers files are not guarded with this. >> >> In my case >> $BOOST_ROOT/boost/chrono/system_clocks.hpp >This evidently should not be included. Could you point from where it is >included? libs/chrono/src/chrono.cpp fails to compile with errors in system_clocks.hpp and overflow_helpers.hpp >> $BOOST_ROOT/boost/ratio/detail/overflow_helpers.hpp >This evidently should not be included. Could you point from where it is >included? libs/chrono/src/chrono.cpp fails to compile with errors in system_clocks.hpp and overflow_helpers.hpp libs/chrono/src/process_cpu_clocks.cpp fails to compile with error in overflow_helpers.hpp >> $BOOST_ROOT/boost/thread/future.hpp >Could you point where in this file the compiler fails? >> do not compile, >> "libs/thread/src/future.cpp" >> >> Also Is it possible to make a request to change: >> >> $BOOST_ROOT/boost/thread/future.hpp >> >> line:603 >> for(count_type i=0;i<count;++i) >> { >> #if defined __DECCXX || defined __SUNPRO_CC >> locks[i]=boost::unique_lock<boost::mutex>(futures[i].future_->mutex).move(); >> #else >> locks[i]=boost::unique_lock<boost::mutex>(futures[i].future_->mutex); >> #endif >> } >> >> T0: >> >> for(count_type i=0;i<count;++i) >> { >> #if defined __DECCXX || defined __SUNPRO_CC || defined __hpux >> locks[i]=boost::unique_lock<boost::mutex>(futures[i].future_->mutex).move(); >> #else >> locks[i]=boost::unique_lock<boost::mutex>(futures[i].future_->mutex); >> #endif >> } >> >Please could you create a ticket for that? created ticket 7329. It should be noted that there also numerous warnings in compiling file libs/chrono/src/process_cpu_clocks.cpp i.e "./boost/chrono/detail/inlined/posix/process_cpu_clocks.hpp", line 118: warning #2940-D: missing return statement at end of non-void function "boost::chrono::process_real_cpu_clock::now(boost::system::error_code &)" } "./boost/chrono/detail/inlined/posix/process_cpu_clocks.hpp", line 194: warning #2940-D: missing return statement at end of non-void function "boost::chrono::process_user_cpu_clock::now(boost::system::error_code &)" } "./boost/chrono/detail/inlined/posix/process_cpu_clocks.hpp", line 271: warning #2940-D: missing return statement at end of non-void function "boost::chrono::process_system_cpu_clock::now(boost::system::error_code &)" } "./boost/chrono/detail/inlined/posix/process_cpu_clocks.hpp", line 350: warning #2940-D: missing return statement at end of non-void function "boost::chrono::process_cpu_clock::now(boost::system::error_code &)" } These could easily be removed by simple restructure of the code. Best regards, Ta, Avi [View Less]

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