- Boost-users - lists.boost.org

[qi] Get line number of an on_error handler from an ifstream iterator
by boost_mailinglist＠gmx.de 16 Sep '11

16 Sep '11

Hello, can anyone of you give me a hint, how I can get the line number of the input file inside the on_error handler where the parsing error happens? Full source is atttached as file.cpp. bool test(Iterator first, Iterator last) { qi::rule<Iterator>start; start.name("start"); start=*(eps>char_('a')>>eol); on_error<fail> ( start , std::cout << val("Error! Expecting ") << _4 << val(" here(") //linenumber insert << val("): \"") << construct<std::string>(_3, _2) << val("\"") << std::endl ); bool r = qi::parse(first,last,start); if (r && first == last){ return true; } else{ return false; } } Best regards

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Re: [Boost-users] [serialization] Implementing a JSON archive
by Stepan Seycek 16 Sep '11

16 Sep '11

Hi Leo, what about JSONCPP (http://jsoncpp.sourceforge.net/) We use it for interfacing with CouchDB. BR, Stepan On 2011-09-16 11:06, Leo Cacciari wrote: > Hi, > for a project I'm working on, I need to be able to send JSON-encoded > objects on a network connection. I though that extending the > xml_[io]archive classes could do the trick, given that JSON, just like > xml, is based on representing an object by a collection of NVPs > (name-value pairs). However, I was unable to find an explication on > _how_ to extend that class, and I lost myself very quickly when I tried > to follow the code in the source. > > Thus I'm wondering... > > First, should I actually modify xml_[io]archive or should I extend > text_[io]archive by adding serialization of NVPs? > > If, as I think, the right way is to extend text_[io]archive, and more > so if I should actually extend/modify xml_[io]archive, does anyone have > suggestion on how to do that? > > Even better, does anyone have a JSON serializer I could use in a > (*commercial*) project? > > Thanks a lot for your help > > -- > Leo Cacciari > > Aliae nationes servitutem pati possunt. Populi Romani est propria > libertas. > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users

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[serialization] Implementing a JSON archive
by Leo Cacciari 16 Sep '11

16 Sep '11

Hi, for a project I'm working on, I need to be able to send JSON-encoded objects on a network connection. I though that extending the xml_[io]archive classes could do the trick, given that JSON, just like xml, is based on representing an object by a collection of NVPs (name-value pairs). However, I was unable to find an explication on _how_ to extend that class, and I lost myself very quickly when I tried to follow the code in the source. Thus I'm wondering... First, should I actually modify xml_[io]archive or should I extend text_[io]archive by adding serialization of NVPs? If, as I think, the right way is to extend text_[io]archive, and more so if I should actually extend/modify xml_[io]archive, does anyone have suggestion on how to do that? Even better, does anyone have a JSON serializer I could use in a (*commercial*) project? Thanks a lot for your help -- Leo Cacciari Aliae nationes servitutem pati possunt. Populi Romani est propria libertas.

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Abort error with simple Boost regexp
by V A 16 Sep '11

16 Sep '11

Hi, While running the following program using boost 1.26.0, I get an abort error. Any idea why? Thank you. test program ------ int main( int argc, char **argv ) { string yexp = ".*{"; boost::regex expression( yexp.c_str() ); return 0; } // main() Here is the gdb trace: ------ #0 0x618e7ecc in kill () from /usr/lib32/compat/libc.so.4 #1 0x6192c525 in abort () from /usr/lib32/compat/libc.so.4 #2 0x6187d8c8 in __default_terminate () from /home/y/lib/libstdc++.so.2.10 #3 0x6187d8e5 in __terminate () from /home/y/lib/libstdc++.so.2.10 #4 0x6187e1c0 in throw_helper (eh=0x61893c60, pc=0x1002865, my_udata=0xffffdbf0, offset_p=0xffffdbec) from /home/y/lib/libstdc++.so.2.10 #5 0x6187e375 in __throw () from /home/y/lib/libstdc++.so.2.10 #6 0x01002a4b in main (argc=1, argv=0xffffdd24) at testBoost.cc:18

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[test] SIGSEGV using BOOST_CHECK_XXXX from a BOOST_GLOBAL_FIXTURE
by mark Pashley 15 Sep '11

15 Sep '11

Hi all, If any function called by a BOOST_GLOBAL_FIXTURE makes a BOOST_XXXX macro call my test case is terminated with a SIGSEGV. I assume that this is because some part of the boost test framework has not been initialised as the point where by call is made. Is this a known problem or is this intentional behaviour? If this is intentional what should I do instead of calling BOOST_MESSAGE / BOOST_FAIL / BOOST_CHECK (for now I have replaced the last 2 with assert but this is not ideal...). Regards Mark

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[Review] Boost.Endian Review
by joel falcou 15 Sep '11

15 Sep '11

A gentle reminder that the Boost.Endian review is scheduled to end today. Any participant that wish to submit review can do so before tonight Regards

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boost::unordered_map using boost::interprocess::cached_node_allocator compilation failure
by Lenny Maiorani 15 Sep '11

15 Sep '11

Hi Boost-ers, I am trying to create a boost::unordered_map in a boost::interprocess::managed_shared_memory segment. This works fine until I try to change from using boost::interprocess::allocator to boost::interprocess::cached_node_allocator. It seems that the hash_bucket structure is deferring the key size calculation, but the cached_node_allocator needs the size at compilation time. Any ideas on how to make this work? Below is a sample attempt which displays my problem along with the GCC output. Thanks, -Lenny Sample code: #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/segment_manager.hpp> #include <boost/interprocess/containers/string.hpp> #include <boost/interprocess/allocators/cached_node_allocator.hpp> #include <boost/unordered_map.hpp> using namespace boost::interprocess; int main () { //Create shared memory. managed_shared_memory segment(create_only, "SharedMem", //segment name 65536); // Define cached node allocator type for char in a shared memory segment. typedef boost::interprocess:: cached_node_allocator<char, managed_shared_memory::segment_manager> cached_node_allocator_t; // Define an interprocess string type which uses the cached node allocator. typedef boost::interprocess:: basic_string<char, std::char_traits<char>, cached_node_allocator_t> shared_string_t; // Get an instance of the allocator. cached_node_allocator_t allocator_instance( segment.get_segment_manager()); // Create an unordered map with Key and Value as interprocess strings, using the default hash and predicate // and use the cached node allocator. boost::unordered_map<shared_string_t, shared_string_t, boost::hash<shared_string_t>, std::equal_to<shared_string_t>, cached_node_allocator_t> my_map_t(allocator_instance); return 0; } GCC output: $ g++ -I/opt/local/include cnasum.cc /opt/local/include/boost/interprocess/allocators/detail/allocator_common.hpp: In instantiation of ‘const size_t boost::interprocess::sizeof_value<boost::unordered_detail::hash_bucket<boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >::value’: /opt/local/include/boost/interprocess/allocators/cached_node_allocator.hpp:104: instantiated from ‘boost::interprocess::cached_node_allocator<boost::unordered_detail::hash_bucket<boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul>’ /opt/local/include/boost/unordered/detail/fwd.hpp:134: instantiated from ‘boost::unordered_detail::hash_bucket<boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >’ /opt/local/include/boost/unordered/detail/fwd.hpp:278: instantiated from ‘boost::unordered_detail::hash_iterator_base<boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul>, boost::unordered_detail::ungrouped>’ /opt/local/include/boost/unordered/detail/fwd.hpp:347: instantiated from ‘boost::unordered_detail::hash_buckets<boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul>, boost::unordered_detail::ungrouped>’ /opt/local/include/boost/unordered/detail/fwd.hpp:921: instantiated from ‘boost::unordered_detail::types<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::hash<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, std::equal_to<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul>, boost::unordered_detail::map_extractor<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > > >, boost::unordered_detail::ungrouped>’ /opt/local/include/boost/unordered/detail/unique.hpp:125: instantiated from ‘boost::unordered_detail::map<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::hash<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, std::equal_to<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >’ /opt/local/include/boost/unordered/unordered_map.hpp:63: instantiated from ‘boost::unordered_map<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::hash<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, std::equal_to<boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >’ cnasum.cc:35: instantiated from here /opt/local/include/boost/interprocess/allocators/detail/allocator_common.hpp:43: error: invalid application of ‘sizeof’ to incomplete type ‘boost::unordered_detail::hash_bucket<boost::interprocess::cached_node_allocator<std::pair<const boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >, boost::container::basic_string<char, std::char_traits<char>, boost::interprocess::cached_node_allocator<char, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> > >, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index>, 64ul> >’ $

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boost::thread join() and DLL unloading
by Christopher Pisz 15 Sep '11

15 Sep '11

My dll seems to be hanging in the when passed to regsvr32 I debugged through it and it is in deadlock on a boost::thread::join() The call stack tells me: The DLL is unloading The destructor to a global has been called That global contains a boost::thread object, on which join() has been called. (The boost::thread procedure has already exited) join() never returns. I've googled for a few hours and seen people mention something to the effect of "you cannot call join from DllMain" and "while DLL is unloading", but no explanation or alternative. How would I go about fixing this problem? I don't think I can guarentee noone will ever make a global instance of my class....

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Boost.Threads on MSVC++ 9
by Robert Bielik 15 Sep '11

15 Sep '11

Using 1.47.0 I'm trying to use boost.threads on MSVC++ 2008, but run into the "Threading support unavaliable: it has been explicitly disabled with BOOST_DISABLE_THREADS" error. Googling it points to MSVC++ language extensions being disabled. This is not the case for me, language extension are enabled. Ideas? TIA /Rob

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boost 1.47: gcc file dependency generation trips over BOOST_PARAMETER_MAX_ARITY
by Ytsen de Boer 15 Sep '11

15 Sep '11

Hi, To take care of dependencies in my project using boost, I used to invoke gcc with the option -MM. However, since using boost 1.47, this does not work anymore. The precompiler aborts with the message: /usr/local/include/boost-1_47/boost/signals2/signal_type.hpp:29:2: error: #error This header requires BOOST_PARAMETER_MAX_ARITY to be defined as 7 or greater prior to including Boost.Parameter headers Because the macro BOOST_PARAMETER_MAX_ARITY plays no role whatsover in this invocation of gcc, I think that boost should solve their internal problem with the "arity" in some other way. In the mean time I define the macro in my make rules to generate the dependencies, but there it is obviously misplaced (any tips or tricks are welcome here). All the best, Ytsen.

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