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[Boost.MultiIndex] map by string and search by char*
by dariomt＠gmail.com 14 Dec '07

14 Dec '07

I'm trying to use Boost-MultiIndex to achieve: 1) the equivalent (or similar) functionality & performance of an std::map<std::string, ValType> with searches by std::string 2) perform searches by const char* without creating a temporary std::string and without copying the actual char's --------------------------code----------------------- #include <string> #include <functional> #include <cassert> #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/member.hpp> using namespace boost; using namespace boost::multi_index; struct elem { std::string m_key; double m_value; elem( const std::string& key, double value) : m_key(key), m_value(value) {} }; struct less_string : std::less<std::string> { using std::less<std::string>::operator(); // use operator< bool operator() (const std::string& lhs, const char* rhs) const {return lhs < rhs;} bool operator() (const char* lhs, const std::string& rhs) const {return lhs < rhs;} }; typedef multi_index_container< elem, indexed_by< ordered_unique< member<elem,std::string,&elem::m_key>, less_string > > > elem_set; int main() { elem_set s; s.insert( elem("p", 1.0) ); assert( s.find("p") != s.end() ); // no temporary and no data copy! I did it! return 0; } --------------------------code----------------------- Is this the right way to go? Any hint will be appreciated. TIA PS: I know I'm actually getting something more like a std::set, it's ok

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BGL support for graphml
by abhishek.v＠tcs.com 14 Dec '07

14 Dec '07

Hi.. I have downloaded the graphml.cpp, graphml.hpp, reader_test.cc and the test xml file. To check whether the code posted by Tiago on http://article.gmane.org/gmane.comp.lib.boost.devel/146836 to see if it is working fine or not. I m able to build the project and link the libraries of expat as well in Dev-Cpp. But while executing the exe file i m getting an error "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information." What could be the reason for this. Also i want to know from where i should download the latest version of graphml.cpp and graphml.hpp. As i have downloaded the latest version of boost from the sourceforge site but in this the graphml.cpp and graphml.hpp files are missing. Currently i m working with the version of Tiago but let me know if stable version are going to be included in the standard boost package or this itself is a the latest and stable version and i m missing out something. Thanks Abhishek Vyas ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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STL Maps
by merlin antony 14 Dec '07

14 Dec '07

hi, i'm using stl maps in my project to create maps. this stl maps is datatype specific. eg map<int,int>, map <string,int>, etc.. is they any way to create a template map like map<T,T>. so that the map is compatible across any datatype being passed to it? is it possible to do in boost library by using property map concept? thanx, merlin.

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Recursive grammar problem
by john 14 Dec '07

14 Dec '07

Hello, I have a string I want to parse that is like that A or A or A or ( C or C or C or ( D) or C) or B. Obviously A and B are just something else but we don't care about it here. I define it as mystring = (A | (ch_p('(') >> A >> ch_p(')'))) >> * ("or" >> (A | mystring)) the problem is that as this is exactly the same over and over, I'm getting the end results in the furthest mystring possible: B will be part of "( C or C or C or ( D) or C) or B" and not of the total string and that messes my grammar :( I have no idea how to pass that trouble, so any help on that would be appreciated (well if anyone understood what I said ;) ) Thanks

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Serialization of STL containers?
by Joseph Turian 14 Dec '07

14 Dec '07

I am unable to serialize STL containers. Here's an example, with error message foo.cpp: #include <iostream> #include <fstream> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/list.hpp> #include <boost/archive/tmpdir.hpp> class bus_route { friend class boost::serialization::access; std::list<int> stops; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & stops; } public: bus_route(){} }; main() { std::ofstream ofs("removeme"); boost::archive::text_oarchive oa(ofs); bus_route a; oa << a; } ==== $ gcc -o foo foo.cpp /usr/include/boost/archive/detail/oserializer.hpp: In function 'void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive, T = bus_route]': /usr/include/boost/archive/basic_text_oarchive.hpp:78: instantiated from 'void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = bus_route, Archive = boost::archive::text_oarchive]' /usr/include/boost/archive/detail/interface_oarchive.hpp:78: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = bus_route, Archive = boost::archive::text_oarchive]' foo.cpp:29: instantiated from here /usr/include/boost/archive/detail/oserializer.hpp:567: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' Any idea what I'm doing wrong?

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weird bug, std::list nodes don't work properly with pool_allocator.
by Flogromp N. 14 Dec '07

14 Dec '07

/* The pool allocator is not being used properly, somehow, with std::list. When you go to purge the pool, it says nothing was purged, because nothing is even registered as being allocated in the pool. What is going on here? I have included copious debugging information. I've even provided a dummy modification of the boost::pool_allocator class to show what's going on. It's weird. If you change l_type to an std::vector, everything will work, and the output will be: purged? 1 This program outputs the following when l_type is std::list, debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::debug_pool_allocator() [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::debug_pool_allocator(const debug_pool_allocator<Tag, U, UserAllocator, Mutex, NextSize>&) [with U = int, Tag = foo_tag, T = std::_List_node<int>, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = std::_List_node<int>, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = std::_List_node<int>, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- ... purged? 0 released? 0 This program outputs the following when l_type is std::vector, debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::debug_pool_allocator() [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] static void debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::deallocate(T*, typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- ... purged? 1 released? 0 */ #include <iostream> using std::cout; using std::endl; #include <list> #include <vector> #include <boost/current_function.hpp> #include <boost/limits.hpp> // std::numeric_limits #include <new> // std::bad_alloc #include <boost/pool/poolfwd.hpp> #include <boost/pool/singleton_pool.hpp> #include <boost/pool/pool_alloc.hpp> #define DEBUG_FUNC cout << BOOST_CURRENT_FUNCTION << " " << endl template < class Tag, class T, class UserAllocator = boost::default_user_allocator_new_delete, class Mutex = boost::details::pool::default_mutex, unsigned NextSize = 32 > class debug_pool_allocator { public: typedef T value_type; typedef UserAllocator user_allocator; typedef Mutex mutex; static unsigned const next_size = NextSize; typedef value_type* pointer; typedef value_type const* const_pointer; typedef value_type& reference; typedef value_type const& const_reference; typedef typename boost::pool<UserAllocator>::size_type size_type; typedef typename boost::pool<UserAllocator>::difference_type difference_type; template <class U> struct rebind { typedef debug_pool_allocator<Tag, U, UserAllocator, Mutex, NextSize> other; }; debug_pool_allocator() { DEBUG_FUNC; } // default copy constructor // default assignment operator // not explicit, mimicking std::allocator [20.4.1] template <class U> debug_pool_allocator( debug_pool_allocator<Tag, U, UserAllocator, Mutex, NextSize> const& ) { DEBUG_FUNC; } // default destructor static pointer address(reference r) { DEBUG_FUNC; return &r; } static const_pointer address(const_reference s) { DEBUG_FUNC; return &s; } static size_type max_size() { DEBUG_FUNC; return (std::numeric_limits<size_type>::max)(); } static void construct(pointer const ptr, value_type const& t) { DEBUG_FUNC; new(ptr) T(t); } static void destroy(pointer const ptr) { DEBUG_FUNC; ptr->~T(); } bool operator==(debug_pool_allocator const&) const { DEBUG_FUNC; return true; } bool operator!=(debug_pool_allocator const&) const { DEBUG_FUNC; return false; } static pointer allocate(size_type const n) { DEBUG_FUNC; const pointer ret = static_cast<pointer>( boost::singleton_pool< Tag, sizeof(T), UserAllocator, Mutex, NextSize >::ordered_malloc(n) ) ; if (ret == 0) throw std::bad_alloc(); return ret; } static pointer allocate(size_type const n, void const* const) { DEBUG_FUNC; return allocate(n); } static void deallocate(pointer const ptr, size_type const n) { DEBUG_FUNC; boost::singleton_pool< Tag, sizeof(T), UserAllocator, Mutex, NextSize >::ordered_free(ptr, n); } }; // --- struct foo_tag {}; // IF YOU CHANGE THIS TO std::vector, IT WILL DEALLOCATE PROPERLY! typedef std::list< int, debug_pool_allocator<foo_tag, int> > l_type; int main() { bool success = false; l_type* l = new l_type; for (int i=0; i<2; ++i) { l->push_back(444); cout << "---" << endl; } cout << "..." << endl; success = boost::singleton_pool<foo_tag, sizeof(int)>::purge_memory(); cout << "purged? " << success << endl; success = boost::singleton_pool<foo_tag, sizeof(int)>::release_memory(); cout << "released? " << success << endl; }

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[review] Boost.Functional/Forward - result
by John Torjo 13 Dec '07

13 Dec '07

Hi all, I'm happy to announce that The Boost.Functional/Forward library has been accepted into Boost. Congrats to Tobias for a great lib! Summary: 5 reviews, all positive. Suggestions for improvement: - Automatically detect if the compiler supports variadic templates and rvalue references and use those instead. This can be a useful portability utility when such compilers become more common. - It should use compressed_pair to store the wrapped function object to take advantage of EBO. - more tweakable parameters for specific uses - like, arity 3 for function X, and arity 5 for function Y - Docs: add more material explaining the forwarding problem - Docs: should be explicitly specified that the wrapped function object must be result_of compatible - Docs: A discussion of the impact of the library on compile time (especially with high values of N) Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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[boost::logging] flushing rolling_file
by Benjamin de Dardel 13 Dec '07

13 Dec '07

Hi all, Does anybody use boost::logging ? I wonder if it's possible to flush logs in a rolling_file as in a standard file (flush_each_time) ? It would be nice ! Thanks, Benjamin

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Re: [Boost-users] [boost] [review] Gentle reminder - Fast track formal review of Boost.Functional/Factory will begin December 17
by John Torjo 13 Dec '07

13 Dec '07

Joel de Guzman wrote: > John Torjo wrote: > >> Hi all, >> >> This is a gentle reminder of the Boost.Functional/Factory review, about >> to start next Monday. >> >> >> Factories are callback mechanisms for constructors, so we provide two >> function objects, boost::value_factory and boost::factory, that >> encasulate object construction through direct application of the >> constructor or operator new, respectively. These templates make other >> facilities that operate on function objects (such as standard >> algorithms, Boost.Bind, Boost.Function, or Fusion functional adapters) >> applicable to constructors. >> >> Get it from here: >> http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… >> > > Link to docs please? Thanks! > > I've posted them temporarily on my site - http://www.torjo.com/tobias/ Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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Re: [Boost-users] BGL Max flow min cut
by Line B. Reinhardt 13 Dec '07

13 Dec '07

It is mostly the reverse edge I have problem with. My graph is not necessarily a complete graph and therefore in my graph an reverse edge does not always exist. However I would like to introduce just when running the algorithm. I think I will need two graphs but maybe have a map between the edges which are cooresponding in both graphs. Thanks for your answer. Best regards Line On Dec 10, 2007 7:37 AM, Line B. Reinhardt <lbr(a)ctt.dtu.dk> wrote: > Dear All > I would like some help with graph structure for the edmund_karp max flow min cut function. > I have a general graph in which I have many properties + edge and vertex. I sould like to run edmund karp on this graph however I have not been able to make the structure right for edmund karp and therefore I have made a second graph a flow graph. However I do not want to copy edges over every time I change something in the original graph. I was wundering if I could make it the same graph or just make the flow graph a filteret version of the original graph. > The graphs are defined as follows:: <snip> Hi Line, Can you explain what you mean by "have not been able to make the structure right"? Your original graph needs to have reversed edges (for every edge (u,v) in the graph, (v,u) needs to also be in the graph), but unless you're missing that, you should be able to avoid having to create a separate graph to pass in. If you are missing reversed edges, you won't be able to add them through a filtered graph - a filtered graph only lets you remove some set of vertices and/or edges from the graph. Regards, Aaron _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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[review] Review of Unordered library started December 7 and still running!
by Ion Gaztañaga 13 Dec '07

13 Dec '07

Hi all, The formal review of the Unordered library started December 7, we have a few nice reviews, but they are not enough. If you are interested in the library (and I *know* you are), please take some time to review it. This is the info you need to do a review: *Description*: An implementation of the unordered containers specified in TR1, with most of the changes from the recent draft standards. *Author*: Daniel James *Download*: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… The documentation is in the zip file. I've put documentation online here: http://igaztanaga.drivehq.com/unordered http://tinyurl.com/yw8wjp What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Ion Gaztañaga - Review Manager -

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a bug in lambda
by Guo Xu 12 Dec '07

12 Dec '07

i found that , when int a = 2, b = 0 the expression max( (_1 - _2 - 4)( a, b ) , 0 ); should return 0, but return -2, why ? is it a bug in lambda?

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[accumulators] Compilation Problem
by Olivier Tournaire 12 Dec '07

12 Dec '07

Hi all, I am trying to use boost::accumulators lib and I would appreciate some help. I do not know how to use the tag::density. How do I use : accumulator_set<double, tag::density > angular_acc; and set density::cache_size density::num_bins To have for example 10 subdivisions between -pi and pi ? Then, how do I extract the results of the accumulation ? Regards Olivier -- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.

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Bug in filesystem library? (wpath, wdirectory_iterator)
by Olivier Delande 12 Dec '07

12 Dec '07

I noticed something which looks pretty much like a bug in the filesystem library. Both version 1.34.1 and CVS are affected under Linux. I do not know about other versions/platforms. If I compile and run the following code ----------------------------------- #include <boost/filesystem.hpp> #include <iostream> int main(int argc, char *argv[]) { boost::filesystem::wpath p(L"/"); boost::filesystem::wdirectory_iterator i(p); return 0; } ----------------------------------- then I get an exception: ----------------------------------- terminate called after throwing an instance of '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> >' what(): boost::filesystem::wpath::to_external conversion error: Invalid argument Aborted ----------------------------------- However, the following alternate version (which uses char instead of wchar_t) works: ----------------------------------- #include <boost/filesystem.hpp> #include <iostream> int main(int argc, char *argv[]) { boost::filesystem::path p("/"); boost::filesystem::directory_iterator i(p); return 0; } ----------------------------------- Has anyone ever found a way to cope with that or filed a bug? Thanks -- Olivier

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maps and constructor
by Hicham Mouline 12 Dec '07

12 Dec '07

Hello, I am attempting to design a class: class C { std::map<double, const A> ma; std::map<double, const B> ma; . public: C(...); }; The keys in the 2 maps are always identical. So I could choose: std::map<double, const std::pair<A,B> > or std::map<double, const std::pair<A,B>* > (ps: AFAIK, using a const-ref for the pair is impossible, but possible with some boost classes) Q1: Is there a difference in memory usage, in access speed or in code readability between the top choice and bottom ones? Q2: Between the 2 bottom ones (storing the pair object in the map vs storing the ptr) Q3: For users of class C, what sort of constructors should I offer? C::C(const std::map<double, const std::pair<A,B>* >& ) Or, should I allow adding elements to the map after the object being constructed? C::add(double, const A&, const B&) Are there better ways with boost classes? Thank you for boost and your time, Rds,

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Re: [Boost-users] [File System] unresolved symbol unsigned int boost::filesystem::detail::not_found_error after upgrade from boost 1_34_0 to 1_34_1
by Bill McLean 12 Dec '07

12 Dec '07

Oops. The below is no longer a problem. In order to resolve the problem, I reinstalled boost from Boost Consulting and had it install all the libraries. One I dropped my belief that I had done everything correctly and I redid the installation was I able to resolve the problem. Bill McLean -----Original Message----- From: Bill McLean [mailto:bill@mcleansoftware.com] Sent: Wednesday, December 12, 2007 11:55 AM To: 'boost-users(a)lists.boost.org' Subject: [File System] unresolved symbol unsigned int boost::filesystem::detail::not_found_error after upgrade from boost 1_34_0 to 1_34_1 After upgrading from Boost 1.34.0 to 1.34.1, I get the Visual Studio 2005 error and building my project: Error 805 error LNK2001: unresolved external symbol "unsigned int boost::filesystem::detail::not_found_error" (?not_found_error@detail@filesystem@boost@@3IA) FolderProcessing.obj I have isolated the error to the declaration: boost::filesystem::directory_iterator it(folder); Using boost 1_34_0 the above declaration worked and with 1_34_0 it fails. I have copied the installed boost 1.34.1 (from Boost Consulting) C:\Program Files\boost\boost_1_34_1 to my project folder C:\projects\ardev\CurrentDev\ExternalLibs\boost where I copied the new boost 1_34_1 release over top the 1_34_0 release. All references to 1_34_0 libraries have been changed to 1_34_1 libraries: ... boost_signals-vc80-mt-gd-1_34_1.lib boost_thread-vc80-mt-gd-1_34_1.lib boost_filesystem-vc80-mt-gd-1_34_1.lib

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Re: [Boost-users] build boost.python tutorial "hello world" without bjam
by damny＠web.de 12 Dec '07

12 Dec '07

hi. in result of your post, i changed my original bat like this: // --- snip ----------------------------------------------------------------------------- SET DIR_MINGW=c:\development_compiler\mingw\ SET DIR_BOOST=c:\development_compiler\_boost\ SET DIR_PYTHN=c:\development_compiler\python25\ SET DIR_PRJCT=%~dp0 SET NME_PRJCT=hello SET CC=c:\development_compiler\mingw\bin\g++.exe SET LD=c:\development_compiler\mingw\bin\ld.exe SET INCL=-I%DIR_BOOST%include\boost-1_34_1 -I%DIR_PYTHN%include -I%DIR_MINGW%include SET LIBS=-L%DIR_BOOST%lib -L%DIR_PYTHN%libs -L%DIR_MINGW%lib %CC% -O0 -shared %INCL% %DIR_PRJCT%%NME_PRJCT%.cpp ^ %LIBS% %DIR_BOOST%lib\boost_python-mgw34-1_34_1.a -lpython25 ^ -o %NME_PRJCT%.pyd // --- snip ----------------------------------------------------------------------------- in association with "boost_python-mgw34-1_34_1.dll" the "hello world" demo works *YeahHa*. but is there a possibility to avoid the necessity of using the dll? :o) daniel > -----Ursprüngliche Nachricht----- > Von: boost-users(a)lists.boost.org > Gesendet: 05.12.07 15:37:35 > An: boost-users(a)lists.boost.org > Betreff: Re: [Boost-users] build boost.python tutorial "hello world" without bjam > > damny(a)web.de wrote: > > > thanks for your replay, > > > > but nothing happens when i reorder the compile command. > > like before, the same error messages appear. > > > > are there any other ideas? i'm at a loss. > > OK, the only other thing I can offer is the output if the commands invoked > by bjam when building this tutorial example: > > ---%<--- > C:\src\boost\BOOST_~3\libs\python\example\tutorial>bjam -d+2 --toolset=gcc > Building Boost.Regex with the optional Unicode/ICU support disabled. > Please refer to the Boost.Regex documentation for more information > (don't panic: this is a strictly optional feature). > gcc.compile.c++ bin\gcc-mingw-3.4.2\debug\hello.o > > "g++" -ftemplate-depth-128 -O0 -fno-inline -Wall -g > -I"..\..\..\.." -I"C:\Python25\Include" -c -o > "bin\gcc-mingw-3.4.2\debug\hello.o" "hello.cpp" > > gcc.link.dll bin\gcc-mingw-3.4.2\debug\hello.a > bin\gcc-mingw-3.4.2\debug\hello.pyd > > "g++" -L"C:\Python25\libs" -Wl,-R -Wl,"C:\Python25" -Wl,-R > -Wl,"C:\Python25\libs" "-Wl,--out-implib,bin\gcc-mingw-3.4.2\debug\hello.a" > -o "bin\gcc-mingw-3.4 > .2\debug\hello.pyd" -shared -Wl,--start-group > "bin\gcc-mingw-3.4.2\debug\hello.o" > "..\..\..\..\bin.v2\libs\python\build\gcc-mingw-3.4.2\debug\boost_python-mgw3 > 4-d-1_34_1.a" -lpython25 -Wl,--end-group -g > > Creating library file: bin\gcc-mingw-3.4.2\debug\hello.a > --->%--- > > Here you can see the exact command used to compile and link the tutorial > example in boost 1.34.1. > > Maybe this gets you started. > > HTH, Markus > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066

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identification of thread
by Igor 12 Dec '07

12 Dec '07

Hi, Could you please explain for beginner in thread-related business, how the thread is identified from itself? Can the program, that it the given thread, obtain its own number or an index of itself? I assume that there should be some enumeration such as numbering the main program by 0, next child thread by 1, etc.? And, in particular, is this number available from boost thread library? THanks in advance Igor

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iterator_range compile problem
by Olivier Tournaire 12 Dec '07

12 Dec '07

Hi all, I am having problem while compiling this code : typedef std::pair<double,double> t_pair; typedef std::vector< t_pair > t_vector; typedef t_vector::iterator t_iterator; typedef iterator_range< t_iterator > histogram_type; // syntax error : missing ';' before '<' Do you have any issue ? Regards Olivier -- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.

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boost::random issue with icc on Windows
by Geoff Wedig 12 Dec '07

12 Dec '07

Hello, We are experiencing a problem with boost::random using icc on Windows under optimization. If we compile with the -O1 option, we get correct behavior. Compiling with -O2 or no -O option gives us a string of zeros. We have compiled a small test case which shows this problem: #include "boost/function.hpp" #include "boost/random.hpp" #include <iostream> #include <iomanip> using namespace std; typedef boost::lagged_fibonacci607 RGType; typedef boost::uniform_smallint<> DistType; typedef boost::variate_generator<RGType, DistType> GeneratorType; int main() { DistType mainDist(0,10000); RGType mainEng((boost::uint32_t) 12); GeneratorType mainGen(mainEng, mainDist); for(size_t i = 0; i != 10; ++i) cout << mainGen() << ", "; cout << endl; } To date, I've done a lot of hunting trying different compiler options to attack this problem. The compiler option which seems to have the most consistent effect, in that adding it makes the program work, whereas removing it makes it not is -Qunroll0. I am guessing something in the optimization is causing the generator not to initialize properly, but I do not, at present, know how to solve it. Has anyone else seen this, or have any ideas what might be going wrong? I appreciate any ideas. Thanks, Geoff Wedig Digital Domain

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Constant floats
by Robert Dailey 12 Dec '07

12 Dec '07

Is there a way I can define constant floats within class scope like you can with integral values? I was hoping boost could help in this area. For example: struct default_alpha { static const float value = 1.0f; }; The above is not legal, of course. Anyone? Thanks.

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[File System] unresolved symbol unsigned int boost::filesystem::detail::not_found_error after upgrade from boost 1_34_0 to 1_34_1
by Bill McLean 12 Dec '07

12 Dec '07

After upgrading from Boost 1.34.0 to 1.34.1, I get the Visual Studio 2005 error and building my project: Error 805 error LNK2001: unresolved external symbol "unsigned int boost::filesystem::detail::not_found_error" (?not_found_error@detail@filesystem@boost@@3IA) FolderProcessing.obj I have isolated the error to the declaration: boost::filesystem::directory_iterator it(folder); Using boost 1_34_0 the above declaration worked and with 1_34_0 it fails. I have copied the installed boost 1.34.1 (from Boost Consulting) C:\Program Files\boost\boost_1_34_1 to my project folder C:\projects\ardev\CurrentDev\ExternalLibs\boost where I copied the new boost 1_34_1 release over top the 1_34_0 release. All references to 1_34_0 libraries have been changed to 1_34_1 libraries: ... boost_signals-vc80-mt-gd-1_34_1.lib boost_thread-vc80-mt-gd-1_34_1.lib boost_filesystem-vc80-mt-gd-1_34_1.lib

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[program_options] std::wstring ??
by Robert Bielik 12 Dec '07

12 Dec '07

I've tried using the std::wstring with program options, couldn't make it work, only with std::string. Any workarounds? TIA /R

2 4

[review] Gentle reminder - Fast track formal review of Boost.Functional/Factory will begin December 17
by John Torjo 12 Dec '07

12 Dec '07

Hi all, This is a gentle reminder of the Boost.Functional/Factory review, about to start next Monday. Factories are callback mechanisms for constructors, so we provide two function objects, boost::value_factory and boost::factory, that encasulate object construction through direct application of the constructor or operator new, respectively. These templates make other facilities that operate on function objects (such as standard algorithms, Boost.Bind, Boost.Function, or Fusion functional adapters) applicable to constructors. Get it from here: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

1 0

Supporting Visual Studio 6 in boost
by Mathieu Malaterre 12 Dec '07

12 Dec '07

Hi there, This is not exactly a user question, but I was wondering if a couple of boost developers could comment on the support of VS6 in boost. How much time consuming is it ? Are there plan to actually drop it at some point ? Were there cases where you had to provide a duplicate implementation (partial specialization, template template parameter, SFINAE...) with slight modifications, therefore making the boost code more difficult to maintain ? How much did this compiler impact the design of boost API / internals ? Thanks for comments, -- Mathieu Ps: I know there are other buggy compilers out there that are also 'supported', feel free to also add comment for another difficult to support compiler.

3 2

Boost::Timer problem
by Simon Pickles 12 Dec '07

12 Dec '07

Hello, Using gcc on ubuntu, can anyone tell my why this simple code: ///////////////////////////////////////////////// #include <iostream> using namespace std; #include "boost/timer.hpp" #include <time.h> int main() { clock_t t = clock(); boost::timer bt; cout << t << " : " << bt.elapsed() << endl; sleep(10); t = clock(); cout << t << " : " << bt.elapsed() << endl; sleep(10); t = clock(); cout << t << " : " << bt.elapsed() << endl; return 0; } //////////////////////////////////////////////////////////////// produces output like this: 0 : 0 0 : 0 0 : 0 Its not cout, since pausing the program shows the values to be 0 in the watch window. Many thanks Simon -- Linux Counter: User# 424693

4 4

boost::serialization - prevent object creation when loading a pointer
by Darryl Lawson 12 Dec '07

12 Dec '07

Peter Dimov wrote: > You can add > > virtual void load( boost::archive::text_iarchive& ar, unsigned v ) > = 0; > virtual void save( boost::archive::text_oarchive& ar, unsigned v ) > = 0; > > to base and call them in A::serialize, but this obviously only works > for a > specific archive type. I specifically need to be able to support different archives, so this won't work - but I think something similar to what you have suggested will. Robert Ramey wrote: > How about the following: > > template<class Archive> > void save(Archive& ar, const unsigned int version) const { > ar << _m; > cout << "serialise A, _m = " << (unsigned long)_m << endl;} > > void save(Archive& ar, const unsigned int version) const { > base * t; > ar >> t; // deserialize to a temporary > // modify _m according to t > cout << "serialise A, _m = " << (unsigned long)_m << endl; > delete t; > > } Yeh something like this would do the trick. So actually, what I am thinking of is a kind of a mix of Robert's and Peter's suggestions (see code below). It is not the prettiest, but I think I should only have to do this for one class hierarchy in particular, so it isn't too bad. Thanks for your help. The serialization library is going to make my life a lot easier! Darryl Lawson #include <iostream> #include <fstream> #include <cassert> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/export.hpp> using namespace std; struct base { virtual ~base() {} template<class Archive> void serialize(Archive& ar, const unsigned int version) {} virtual void load(const base* rhs) {} }; struct derived : public base { derived() : base(), _value(0) {} template<class Archive> void serialize(Archive& ar, const unsigned int version) { boost::serialization::void_cast_register<derived, base>(); ar & _value; } virtual void load(const base* rhs) { const derived* t = dynamic_cast<const derived*>(rhs); assert(t); if (!t) return; _value = t->_value; } int _value; }; BOOST_CLASS_EXPORT(derived); struct A { A() { _m = new derived; cout << "construct A, _m = " << (unsigned long)_m << endl; } template<class Archive> void save(Archive & ar, const unsigned int version) const { ar << _m; cout << "save A, _m = " << (unsigned long)_m << endl; } template<class Archive> void load(Archive & ar, const unsigned int version) { base* t; ar >> t; _m->load(t); delete t; cout << "load A, _m = " << (unsigned long)_m << endl; } BOOST_SERIALIZATION_SPLIT_MEMBER(); private: base* _m; }; void save(const A& a, const char* filename) { std::ofstream ofs(filename); boost::archive::text_oarchive oa(ofs); oa << a; } void load(A& a, const char* filename) { std::ifstream ifs(filename); boost::archive::text_iarchive ia(ifs); ia >> a; } int main(int argc, char* argv[]) { A a; save(a, "archive.txt"); A new_a; load(new_a, "archive.txt"); return 0; }

1 0

boost::serialization - prevent object creation when loading a pointer
by Darryl Lawson 12 Dec '07

12 Dec '07

I realise that what I am doing is no doubt an unconventional usage of boost::serialization, but I wonder if any one has done a similar thing before. I wish to serialize a derived class through a baseclass pointer, but on deserilize I do not want the object to be created (I do not want memory allocated) - as the object will have all ready been created. An example, hopefully showing what I mean, is given at the end. The program will output something like, construct A, _m = 155640808 serialise A, _m = 155640808 construct A, _m = 155649400 serialise A, _m = 155649808 But essentially I want the program to output something lke, construct A, _m = 155640808 serialise A, _m = 155640808 construct A, _m = 155649400 serialise A, _m = 155649400 i.e. the second lot of construct A/serialise A will have the same address for _m. The reason why I need this behaviour, is that only a sub-set of the derived class will be seriliazed, with the other parts of the class intialised differently depending on the session, and the initialisation of the class is always done _before_ deserialisation. Is there anyway to get this behaviour from the boost::serialization library? Many thanks, Darryl Example ------- #include <fstream> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/export.hpp> using namespace std; struct base { virtual ~base() {} template<class Archive> void serialize(Archive& ar, const unsigned int version) {} }; struct derived : public base { derived() : base(), _value(0) {} template<class Archive> void serialize(Archive& ar, const unsigned int version) { boost::serialization::void_cast_register<derived, base>(); ar & _value; } int _value; }; BOOST_CLASS_EXPORT(derived); struct A { A() { _m = new derived; cout << "construct A, _m = " << (unsigned long)_m << endl; } template<class Archive> void serialize(Archive& ar, const unsigned int version) { // On deserialize this will create a new object, but I do not want it to, // rather I would like it to deserialize into the all ready created // object. ar & _m; cout << "serialise A, _m = " << (unsigned long)_m << endl; } base* _m; }; void save(const A& a, const char* filename) { std::ofstream ofs(filename); boost::archive::text_oarchive oa(ofs); oa << a; } void load(A& a, const char* filename) { std::ifstream ifs(filename); boost::archive::text_iarchive ia(ifs); ia >> a; } int main(int argc, char* argv[]) { A a; save(a, "archive.txt"); A new_a; load(new_a, "archive.txt"); return 0; }

3 2

statechart unit testing
by Sean Kelly 12 Dec '07

12 Dec '07

Hi All, I have statechart implementation that I have spread over multiple translation units - I would like to unit test the control logic by inserting mock transition actions. The library is explicitly designed not to be dynamic - Can anyone suggest a way I could accomplish this - Its also likely that I could reuse the statechart control logic with different implementations of transition actions so if it is possible to inject this dependency I can reuse the code. Thanks Sean

2 1

[ptr_container] How do I partition a ptr_vector
by Michael Marcin 11 Dec '07

11 Dec '07

How do I partition a ptr_vector? Most of the other standard algorithms seems to be members but I cannot find partition. Thanks, Michael Marcin

2 1

[logging] Re: Getting started problem (on behalf of Benjamin de Dardel)
by John Torjo 10 Dec '07

10 Dec '07

Hi Benjamin, From what you've explained in your mail, it seems that you're trying to use Boost.Logging from a DLL and an EXE as well. I need to know more details about your scenario. My suggestion: - defining the logs (BOOST_DEFINE_LOG) should happen in the DLL - declaring the logs (BOOST_DECLARE_LOG) should happen in both EXE and DLL - DO NOT define the logs in the EXEcutable as well Note that at this time if you do logging before initializing the logs, nothing will happen - I will fix this very soon. Note: there's some problem with your email address and I can't reply to you directly. Please fix it. Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

1 0

zero_vector, is it broken?
by Neal Becker 10 Dec '07

10 Dec '07

Either I completely misunderstand something, or zero_vector is seriously broken: #include <boost/numeric/ublas/vector.hpp> #include <iostream> #include <iterator> #include <algorithm> using namespace std; namespace ublas = boost::numeric::ublas; int main() { ublas::zero_vector<double> zeros (10); copy (zeros.begin(), zeros.end(), ostream_iterator<double> (cout, " ")); } I expect this to print 10 '0'. Instead, it prints nothing.

2 1

BGL Max flow min cut
by Line B. Reinhardt 10 Dec '07

10 Dec '07

Dear All I would like some help with graph structure for the edmund_karp max flow min cut function. I have a general graph in which I have many properties + edge and vertex. I sould like to run edmund karp on this graph however I have not been able to make the structure right for edmund karp and therefore I have made a second graph a flow graph. However I do not want to copy edges over every time I change something in the original graph. I was wundering if I could make it the same graph or just make the flow graph a filteret version of the original graph. The graphs are defined as follows:: original:: typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, VertexProperties, EdgeProperties, GraphProperties> Graph; typedef boost::graph_traits<Graph> DirectedTraits; typedef DirectedTraits::vertex_descriptor DirectedVertex; typedef DirectedTraits::edge_descriptor DirectedEdge; typedef DirectedTraits::vertex_iterator VertexIterator; typedef DirectedTraits::edge_iterator DirectedEdgeIterator; typedef DirectedTraits::out_edge_iterator DirectedOutEdgeIterator; typedef DirectedTraits::in_edge_iterator DirectedInEdgeIterator; typedef boost::property_map<Graph, boost::edge_name_t>::type EdgeNameMap; flow graph:: typedef boost::adjacency_list_traits<boost::vecS, boost::vecS, boost::directedS> FlowTraits; typedef FlowTraits::edge_descriptor edge_descriptor; typedef FlowTraits::vertex_descriptor vertex_descriptor; typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, boost::no_property, boost::property<boost::edge_capacity_t, double, boost::property<boost::edge_residual_capacity_t, double, boost::property<shipping_graph::vertex_start_indicator_t, double, boost::property<boost::edge_reverse_t, FlowTraits::edge_descriptor> > > > > FlowGraph; typedef boost::graph_traits<FlowGraph> DirectedFlowTraits; typedef DirectedFlowTraits::out_edge_iterator FlowOutEdgeIterator; typedef boost::property_map<FlowGraph, boost::edge_capacity_t>::type MaxEdgeWeightMap; Thanks for your help Line

2 1

I can not run dijkestra example
by Mahmood NT 10 Dec '07

10 Dec '07

Hello, As http://www.boost.org/libs/graph/doc/quick_tour.html said (section "Adding Some Color to your Graph"), the ouput of "examples/dijkstra-example.cpp" is: The output is: distances from start vertex: distance(0) = 0 distance(1) = 6 distance(2) = 1 distance(3) = 4 distance(4) = 5 but when I run the file, the ouput is not this!! why? Mahmood NT ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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how to use dijkestra code
by Mahmood NT 10 Dec '07

10 Dec '07

Hello, I am new in mailing list.... I run the code for dijkstra-example but seem that the section for dijkstra function does not run. I see in "dijkstra-example-listS.cpp": #if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 How can I define it. I use visual .NET 2003. Thanks, Mahmood NT ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

1 0

write_graphviz problem
by Michał Nowotka 09 Dec '07

09 Dec '07

Hello, I'm boost newbie and have some problems with write_graphviz function. I've already asked this question but perhaps with bad subject so i try again. Sorry if you read this second time. In write_graphviz function documentation I can read that PropertyWriter can be used for print both: interior and exterior properties for each vertex of a graph into the graphviz format file. I can find some example of printing graph properties stored in property maps, for example calling: write_graphviz(std::cout, g, make_label_writer(name)); when the graph have 'name' property map. but how to do that when storing properies as bundled properies? I defined following graph: typedef adjacency_list<vecS, vecS, bidirectionalS, Vect_f, Edge_f> Graph; where: struct Vect_f { int factor; int lowlink; int component; int color; bool in_stack; }; struct Edge_f { int num_visited; int color_k; }; and I want to lay out and print my graph with coloured vertexes (I can always change the type of colour property for more suitable if necessary) but I dont't have any idea to do this. Is it possible at all? Cheers, Michał Nowotka

2 2

boost::filesystem: Problem with exists() and wpath (Linux)
by Andreas Henriksson 09 Dec '07

09 Dec '07

Hello Whenever I try to use exists() on a wpath, I get an exception. I'm running Arch Linux, with Boost 1.34.1 and Gcc 4.2.2, if it matters. Here is some code: #include "boost/filesystem.hpp" using namespace boost::filesystem; int main() { wpath test(L"whatever/path"); exists(test); return 0; } Which compiles fine, but gives me this error message on runtime: terminate called after throwing an instance of '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> >' what(): boost::filesystem::wpath::to_external conversion error Aborted Does anyone know what I am missing here?

1 0

boost::filesystem and mingw
by Lennart Wagner 09 Dec '07

09 Dec '07

Hi, I am using boost v1.34.1 and the "current" version of mingw. I got a problem (and solution) with the filesystem library: If the file convenience.hpp is included multiple times, mingw/gcc says: In function `ZN5boost10filesystem9extensionERKNS0_10basic_pathISsNS0_11path_traitsEEE':C:/Daten/Programme/Dev/boost_1_34_1/include/boost/filesystem/convenience.hpp:58: multiple definition of `boost::filesystem::extension(boost::filesystem::basic_path const&)' obj\Debug\Source\global.o:C:/Daten/Programme/Dev/boost_1_34_1/include/boost/filesystem/convenience.hpp:58: first defined here I can solve that (at least for me), if line 31 in convenience.hpp # define BOOST_FS_FUNC_STRING std::string is changed to # define BOOST_FS_FUNC_STRING inline std::string Another change I did to avoid an anoying warning is in line 45 boost::throw_exception( basic_filesystem_error<Path>( "boost::filesystem::create_directories", ph, -1 ) ); I changed the third parameter to 0, since it is unsigned. Have a nice day, Lennart

2 2

Re: [Boost-users] [serialization] Thread safety
by Marc Viala 09 Dec '07

09 Dec '07

> De la part de Robert Ramey: > > the SVN branch serialization_next_release contains this code. > > However best wait til monday as I need to upload a couple of > tweaks. > > Robert Ramey > > Kim Barrett wrote: > >> I came > >> with a solution that has no locking which was important > >> to me. But its only applicable in some applications > >> and serialization library is one of them. In anycase > >> I would welcome comments from anyone who has > >> interest in looking at it. > > > > I'm interested. Can you provide some pointers to specific places to > > look? I should have some time for this (and the test case for the > > polymorphic archive performance patch) after next week. > I'm interested me too, but is it possible to merge this SVN branch code of serialization (serialization_next_release) w/ the Boost 1.34.1 distribution? Or is it required to download the Boost SVN current trunk? Best regards and thanks you in advance for your support. Marc Viala

2 1

[serialization, boost::function] stateful function objects
by Ruediger Berlich 09 Dec '07

09 Dec '07

Hi there, I have a class that is being serialized in regular intervals. It contains a vector<shared_ptr<somefunctionObject> > . As the somefunctionObject objects can maintain state, I want to be able to serialize them along with the surrounding class. This works fine with the current design. I would find it much more pleasing to replace the above vector e.g. with a vector<boost::function<void(someType)> >. From the program logic this would have the same effect, but would be more elegant. I can not see, though, how serialization would work in this case. As far as I know it is not possible to retrieve the object back from boost::function. And it is also not possible to specify more than one interface to boost::function, e.g. in order to support two operator() with different signatures like this: "boost::function<void(someFunctionObkject), someFunctionObject(void)> f;" If that was possible, I could just give the function object a "clone" function and write my own (de-)serialization code. Any ideas ? Thanks and Best Regards, Ruediger Berlich

5 9

trouble compiling with -m32 or address-model=32
by John Salmon 09 Dec '07

09 Dec '07

I'm trying to build boost_1_34_0 on an x86_64 linux box with a 32-bit address model. After letting configure create a bjam for me, I have tried many variations on the following: tools/jam/src/bin.linux/bjam address-model=64 -d2 release And also: tools/jam/src/bin.linux/bjam cxxflags=-m32 linkflags=-m32 cflags=-m32 -d2 release The -d2 appears to show me what the compiler is doing. I see no sign of -m32 command-line options when the compiler is invoked. I also checked the .so file that was created and verifited that it's dynamically linked to libraries in /lib64. What am I doing wrong?? Here's some of the -d2 output with address-model: salmonj(a)drdws032.nyc$ tools/jam/src/bin.linux/bjam address-model=32 -d2 release Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). warning: No toolsets are configured. warning: Configuring default toolset "gcc". warning: If the default is wrong, you may not be able to build C++ programs. warning: Use the "--toolset=xxxxx" option to override our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html ...patience... ...patience... ...found 4006 targets... ...updating 756 targets... gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/type_id.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/type_id.o" "libs/python/src/converter/type_id.cpp" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/enum.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/enum.o" "libs/python/src/object/enum.cpp" And here's some more with cxxflags/cflags/linkflags: salmonj(a)drdws032.nyc$ tools/jam/src/bin.linux/bjam cflags=32 cxxflags=-m32 linkflags=-m32 -d2 release Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). warning: No toolsets are configured. warning: Configuring default toolset "gcc". warning: If the default is wrong, you may not be able to build C++ programs. warning: Use the "--toolset=xxxxx" option to override our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html ...patience... ...patience... ...found 3994 targets... ...updating 747 targets... MkDir1 bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi mkdir "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/numeric.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/numeric.o" "libs/python/src/numeric.cpp" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/list.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/list.o" "libs/python/src/list.cpp" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/long.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/long.o" "libs/python/src/long.cpp"

1 0

about some boost-config helper script
by François Mauger 08 Dec '07

08 Dec '07

Hi boost users, I'm new in the boost (amazing and powerfull) universe and had no time yet to explore archives about this topic. I have just installed the current version of boost libs on my laptop (no problem with it) but I have not found a dedicated helper config script (i.e. boost-config [--cflags|--libs...]) like the ones coming with the well-known packages used in high-energy physics (GSL, ROOT, CLHEP). It will help a lot if such a script was provided by the build process, at least for Unix-like systems. It is very useful within makefiles or whatever "manual" build scripts. Maybe someone can tell why this feature is not in boost (probably there is a good reason I'm not aware of) or if there are plans to provide it. Thank you very much for your kind comment. best regards frc -- Pr. Francois Mauger Laboratoire de Physique Corpusculaire de Caen et Universite de Caen ENSICAEN - 6, Boulevard du Marechal Juin, 14050 CAEN Cedex, FRANCE e-mail: mauger(a)lpccaen.in2p3.fr tel.: (0/+33) 2 31 45 25 12 fax: (0/+33) 2 31 45 25 49

1 0

boost.proto optimization on MSVC (2005/2008)
by AJD 08 Dec '07

08 Dec '07

Hi, I've been trying out boost.proto lately and I've noticed that for my expressions it tends to force my operands to be created on the stack. For example, instead of optimizing out an object completely when everything about it is known at compile-time, the compiler (MSVC 2005 or 2008) is creating that object on the stack anyway.. even though it's not necessary. Even worse, it actually folds the simpler expressions at compile-time and never even touches the data that it just put on the stack. The problem is compounded with larger expressions involving many operands. It even seems to build the larger expression objects on the stack unnecessarily (and this looks like it starts to break constant folding). Here's some of the generated assembly: int main() { 00401800 sub esp,18h vector2< float[3] > v1 = { 0, 1, 2 }; 00401803 xorps xmm0,xmm0 vector2< float[3] > v2 = { 3, 4, 5 }; vector2< float[3] > v3 = { 6, 7, 8 }; // Add two vectors lazily and get the 2nd element. #if 1 // this sticks temporary junk all over the stack, even with 2 terms std::cout << (v1 + v2)[0]; 00401806 fld dword ptr [__real@40400000 (402128h)] 0040180C movss dword ptr [esp],xmm0 00401811 movss xmm0,dword ptr [__real@3f800000 (402124h)] 00401819 movss dword ptr [esp+4],xmm0 0040181F movss xmm0,dword ptr [__real@40000000 (402120h)] 00401827 movss dword ptr [esp+8],xmm0 0040182D movss xmm0,dword ptr [__real@40400000 (402128h)] 00401835 movss dword ptr [esp+0Ch],xmm0 0040183B movss xmm0,dword ptr [__real@40800000 (40211Ch)] 00401843 push ecx 00401844 mov ecx,dword ptr [__imp_std::cout (402044h)] 0040184A fstp dword ptr [esp] 0040184D movss dword ptr [esp+14h],xmm0 00401853 movss xmm0,dword ptr [__real@40a00000 (402118h)] 0040185B movss dword ptr [esp+18h],xmm0 00401861 call dword ptr [__imp_std::basic_ostream<char,std::char_traits<char> >::operator<< (402040h)] std::cin.get(); 00401867 mov ecx,dword ptr [__imp_std::cin (40203Ch)] 0040186D call dword ptr [__imp_std::basic_istream<char,std::char_traits<char> >::get (402038h)] return 0; 00401873 xor eax,eax } 00401875 add esp,18h 00401878 ret I've come up with a couple workarounds but these only work for specific cases: // (1) This optimizes out nicely, but only works for adding 2 objects. typedef proto::terminal< vector2< float[3] > >::type expr_type; std::cout << (vector_expr< expr_type >( expr_type::make(v1) ) + vector_expr< expr_type >( expr_type::make(v2) ))[0]; // (2) This never optimizes out std::cout << (v1 + v2)[0]; I'd noticed that the reference at traits.hpp line 144 seemed to play a major role (it was the only significant difference between the expression trees generated by the above two snippets.) // (3) This makes (2) optimize just like (1), but doesn't help 3+ // HACK TO REMOVE REF AT boost\xpressive\proto\traits.hpp LINE 144 namespace boost { namespace proto { namespace result_of { template<typename T, typename EnableIf> struct as_arg<T, VectorDomain, EnableIf> { typedef expr<proto::tag::terminal, args0<T /*&*/> > expr_type; typedef typename VectorDomain::template apply<expr_type>::type type; template<typename T2> static type call(T2 &t) { return VectorDomain::make(expr_type::make(t)); } }; }}} Finally, here is the entire source I'm using: #include <cstddef> #include <iostream> #include <boost/xpressive/proto/proto.hpp> #include <boost/xpressive/proto/context.hpp> using namespace boost; template< typename T> struct vector2; template< typename T > struct vector2<T[3]> { T v[3]; typedef T value_type; T const & operator [](std::size_t i) const { return this->v[i]; } T & operator [](std::size_t i) { return this->v[i]; } }; // This grammar describes which lazy vector expressions // are allowed; namely, vector terminals and addition // and subtraction of lazy vector expressions. struct VectorGrammar : proto::or_ < proto::terminal< vector2< proto::_ > > , proto::plus< VectorGrammar, VectorGrammar > > { }; // Expressions in the lazy vector domain must conform // to the lazy vector grammar struct VectorDomain; // Here is an evaluation context that indexes into a lazy vector // expression, and combines the result. struct subscript_context { private: std::size_t i; public: subscript_context(std::size_t i) : i(i) { } // Use default_eval for all the operations ... template< typename Expr, typename Tag = typename Expr::proto_tag > struct eval : proto::default_eval< Expr, subscript_context const > { }; // ... except for terminals, which we index with our subscript template< typename Expr > struct eval< Expr, proto::tag::terminal > { typedef typename proto::result_of::arg< Expr >::type::value_type result_type; result_type operator ()(Expr const & expr, subscript_context const & ctx) const { return proto::arg(expr)[ctx.i]; } }; }; // Here is the domain-specific expression wrapper, which overrides // operator [] to evaluate the expression using the subscript_context. template< typename Expr > struct vector_expr : proto::extends<Expr, vector_expr< Expr >, VectorDomain > { typedef proto::extends< Expr, vector_expr< Expr >, VectorDomain > base_type; vector_expr(Expr const & expr) : base_type(expr) { } // Use the subscript_context to implement subscripting // of a lazy vector expression tree. typename proto::result_of::eval< Expr, subscript_context const >::type operator [](std::size_t i) const { subscript_context const ctx(i); return proto::eval(*this, ctx); } }; // Tell proto that in the VectorDomain, all // expressions should be wrapped in vector_expr<> struct VectorDomain : proto::domain< proto::generator< vector_expr >, VectorGrammar > { }; template< typename T > struct is_vector : mpl::false_ { }; template< typename T > struct is_vector< vector2< T > > : mpl::true_ { }; BOOST_PROTO_DEFINE_BINARY_OPERATOR(+, boost::proto::tag::plus, is_vector, VectorDomain); int main() { vector2< float[3] > v1 = { 0, 1, 2 }; vector2< float[3] > v2 = { 3, 4, 5 }; vector2< float[3] > v3 = { 6, 7, 8 }; // Add two vectors lazily and get the 2nd element. #if 1 // this sticks write-only temporary junk all over the stack, even with 2 terms std::cout << (v1 + v2)[0];// + v3 + v3 + v3 + v3 + v3)[0]; #else // this optimizes out completely for 2 terms... expanding to 3 terms does not typedef proto::terminal< vector2< float[3] > >::type expr_type; std::cout << (vector_expr< expr_type >( expr_type::make(v2) ) + vector_expr< expr_type >( expr_type::make(v3) ))[0]; #endif std::cin.get(); return 0; } Thanks in advance. // AJD < n.outpost(a)gmail.com >

3 7

[serialization] Thread safety
by Ruediger Berlich 08 Dec '07

08 Dec '07

Hi there, I remember that, a few months ago, there was a discussion that Boost.Serialization was currently only thread-safe when using g++ . I cannot find any specific information on this topic, however. I have distinct objects, each of which is serialized in its own (boost) thread and then sent over a network connection and deserialized at the other end. Seems to work fine, without synchronization between different serialization calls. I am using Boost 1.34.1 with Asio 0.3.8, together with threadpool 0.2.4. This is on an OpenSuSE 10.3 box with g++ 4.2.1 . Will I run into trouble when I port this to other compilers + platforms ? Thanks and Best Regards, Ruediger

4 9

BUG ?? Date_time
by paul 08 Dec '07

08 Dec '07

/* There seems to be something wrong with the month() member function of boost::gregorian::date if you valgrind the executable of (*this) source file, you will see that some blocks are "possibly lost" and some are also "still reachable". Yet, were you to comment out the line making use of month(), you would see that valgrind sees no problem with the code. what seems to be the problem ? uname -a = Linux Stanford 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686 GNU/Linux */ #include <boost/date_time/gregorian/gregorian.hpp> using namespace boost::gregorian ; #include <iostream> using namespace std ; int main() { date today( day_clock::local_day() ) ; cout << "year = " << today.year() << endl ; cout << "month = " << today.month() << endl ; cout << "day = " << today.day() << endl ; return EXIT_SUCCESS; }

1 0

MSVC 9.0 (2008) config for 1.34.1
by Max Motovilov 08 Dec '07

08 Dec '07

Is there one out there or should I bite the bullet and make my own? Out of the box, 1.34.1 does not seem to recognize the compiler (trial of the final version, distributed by M$ a few days ago). Regards, ...Max...

2 1

[write_graphviz] PropertyWriter and bundled properties
by Michał Nowotka 07 Dec '07

07 Dec '07

In write_graphviz function documentation I can read that PropertyWriter can be used for print both: interior and exterior properties for each vertex of a graph into the graphviz format file. I can find some example of printing graph properties stored in property maps, for example calling: write_graphviz(std::cout, g, make_label_writer(name)); when the graph have 'name' property map. but how to do that when storing properies as bundled properies? I defined following graph: typedef adjacency_list<vecS, vecS, bidirectionalS, Vect_f, Edge_f> Graph; where: struct Vect_f { int factor; int lowlink; int component; int color; bool in_stack; }; struct Edge_f { int num_visited; int color_k; }; and I want to lay out and print my graph with coloured vertexes (I can always change the type of colour property for more suitable if necessary) but I dont't have any idea to do this. Is it possible at all? -- Michał Nowotka

1 0

[Boost][1.34.1] Wrong BOOST_VERSION value in jamrules file
by Andry 07 Dec '07

07 Dec '07

Hello boost-users, Recently i was writing Win32 batch scripts which searches boost directory for version info by grep utility and discovered that Jamrules file in boost installation directory have strange value (from boost_1_34_1.zip): # The current version of Boost. BOOST_VERSION ?= 1.34.0 ; Is this correct value? Or where can i read correct boost version value? -- Best regards, Andry mailto:andry@inbox.ru

2 1

[boost-users] GCC-XML compile errors with boost/mpl/and.hpp
by Jenny Duan (TT) 07 Dec '07

07 Dec '07

Gccxml does not seem to be able to handle the boost/mpl/and.hpp file. I have the most recent gccxml (retrieved the source tree and built it) and 1.34.1 boost. I was told by GCCXML support that boost/config/compiler/gcc_xml.hpp needs to exist in order for GCXXML to process boost header files and this file does exist. Please see the content of it below. Can somebody please tell me why it's not working for me? Your help would be greatly appreciated. Thanks, Jenny ----------------------------------------------------------- // Copyright Aleksey Gurtovoy 2000-2004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/boost/mpl/and.hpp,v $ // $Date: 2004/09/02 15:40:41 $ // $Revision: 1.5 $ #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/bool.hpp> # include <boost/mpl/aux_/nested_type_wknd.hpp> # include <boost/mpl/aux_/na_spec.hpp> # include <boost/mpl/aux_/lambda_support.hpp> // agurt, 19/may/04: workaround a conflict with <iso646.h> header's // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(and)' // has to be checked in a separate condition, otherwise GCC complains // about 'and' being an alternative token #if defined(_MSC_VER) #if defined(and) # pragma push_macro("and") # undef and # define and(x) #endif #endif # define BOOST_MPL_PREPROCESSED_HEADER and.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> #if defined(_MSC_VER) #if defined(and) # pragma pop_macro("and") #endif #endif #else # define AUX778076_OP_NAME and_ # define AUX778076_OP_VALUE1 false # define AUX778076_OP_VALUE2 true # include <boost/mpl/aux_/logical_op.hpp> #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_AND_HPP_INCLUDED ------------------------------------------------ $gccxml -fxml-start=./xml_start_symbols.txt --gccxml-gcc-options ./compiler_optons.txt world.h -fxml=world.xml --- snip--- In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:42, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:16: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:16: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:44, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:15: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:15: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/compression.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/stream_integer_wrapper.h: 32, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:55, from ../common/world.h:33: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_crt_defs.h:3 2:2: error: #error _USE_32BIT_TIME_T must be defined for TT applications In file included from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/tt_systypes.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/streamable.h:38, from ../common/world.h:34: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:3 1:2: error: #error you must include tt_win_defs.h as the first header file in all compilands to ensure correct settings. G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 5:21: error: afx.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 6:24: error: afxwin.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 7:23: error: afxmt.h: No such file or directory In file included from C:/Program Files/Microsoft Visual Studio 8/VC/include/fvec.h:43, from C:/Program Files/Microsoft Visual Studio 8/VC/include/dvec.h:37, from C:/Program Files/Microsoft Visual Studio 8/VC/include/intrin.h:31, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/interlocked.h:29, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/TTCriticalSectionBa se.h:30, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/ttcriticalsection.h :28, from ../common/world.h:38: C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "+" and "0" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "+" and "1" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:221:1: error: pasting "&" and "vec" does not give a valid preprocessing token --- snip---

1 0

[Boost.Lambda] for_each and cout using placeholder
by Kobi Cohen-Arazi 07 Dec '07

07 Dec '07

Hi Folks, What's wrong with the following simple approach: ---- Start code ---- using boost::lambda; int a[10] std::for_each(a, a+10, std::cout << _1); ---- End code ---- It doesn't compile. What am I missing here? Thanks, -- - Kobi

2 2

[GCC-XML] errors with boost header files
by Jenny Duan (TT) 07 Dec '07

07 Dec '07

Resending this message because the message I sent yesterday didn't get posted on the forum. -----Original Message----- From: Jenny Duan (TT) Sent: Thursday, December 06, 2007 4:42 PM To: 'boost-users(a)lists.boost.org' Subject: [GCC-XML] errors with boost header files Gccxml does not seem to be able to handle the boost/mpl/and.hpp file. I have the most recent gccxml (retrieved the source tree and built it) and 1.34.1 boost. I was told by GCCXML support that boost/config/compiler/gcc_xml.hpp needs to exist in order for GCXXML to process boost header files and this file does exist. Please see the content of it below. Can somebody please tell me why it's not working for me? Your help would be greatly appreciated. Thanks, Jenny ----------------------------------------------------------- // Copyright Aleksey Gurtovoy 2000-2004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/boost/mpl/and.hpp,v $ // $Date: 2004/09/02 15:40:41 $ // $Revision: 1.5 $ #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/bool.hpp> # include <boost/mpl/aux_/nested_type_wknd.hpp> # include <boost/mpl/aux_/na_spec.hpp> # include <boost/mpl/aux_/lambda_support.hpp> // agurt, 19/may/04: workaround a conflict with <iso646.h> header's // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(and)' // has to be checked in a separate condition, otherwise GCC complains // about 'and' being an alternative token #if defined(_MSC_VER) #if defined(and) # pragma push_macro("and") # undef and # define and(x) #endif #endif # define BOOST_MPL_PREPROCESSED_HEADER and.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> #if defined(_MSC_VER) #if defined(and) # pragma pop_macro("and") #endif #endif #else # define AUX778076_OP_NAME and_ # define AUX778076_OP_VALUE1 false # define AUX778076_OP_VALUE2 true # include <boost/mpl/aux_/logical_op.hpp> #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_AND_HPP_INCLUDED ------------------------------------------------ $gccxml -fxml-start=./xml_start_symbols.txt --gccxml-gcc-options ./compiler_optons.txt world.h -fxml=world.xml --- snip--- In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:42, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:16: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:16: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:44, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:15: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:15: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/compression.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/stream_integer_wrapper.h: 32, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:55, from ../common/world.h:33: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_crt_defs.h:3 2:2: error: #error _USE_32BIT_TIME_T must be defined for TT applications In file included from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/tt_systypes.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/streamable.h:38, from ../common/world.h:34: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:3 1:2: error: #error you must include tt_win_defs.h as the first header file in all compilands to ensure correct settings. G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 5:21: error: afx.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 6:24: error: afxwin.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 7:23: error: afxmt.h: No such file or directory In file included from C:/Program Files/Microsoft Visual Studio 8/VC/include/fvec.h:43, from C:/Program Files/Microsoft Visual Studio 8/VC/include/dvec.h:37, from C:/Program Files/Microsoft Visual Studio 8/VC/include/intrin.h:31, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/interlocked.h:29, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/TTCriticalSectionBa se.h:30, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/ttcriticalsection.h :28, from ../common/world.h:38: C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "+" and "0" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "+" and "1" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:221:1: error: pasting "&" and "vec" does not give a valid preprocessing token --- snip---

1 0

[serialization] How to pass user defined flags?
by Robert Bielik 07 Dec '07

07 Dec '07

When loading an object via serialization I need to be able to load the object in different modes (which has nothing to do with its data). I tried making an ext_xml_wiarchive (inheriting xml_wiarchive) that adds a function to retrieve the mode, but the serialization template functions do not seem to be able to access that function. I know I'm missing something here... :( /R

2 1

[units] Problem building HTML documentation from QuickBook sources
by Torsten Mähne 07 Dec '07

07 Dec '07

Hello, I'm very interested in the Boost.Units library. I've been therefore trying to use the version, which is available from the Boost Sandbox SVN repository (Revision 41778): svn co http://svn.boost.org/svn/boost/sandbox/units boost_units I've no problems using the header-only Boost.Units library in my own small test programs, but I'm struggling to build the reference documentation located in libs/units/doc/. Therefore, I'm currently forced to use the outdated HTML documentation from the mcs_units_v0.7.2.zip archive available from the Boost file vault or read directly the units.qbk source. I'm using Boost.Units together with boost-1.34.1, which is unpacked in a parallel directory: $ ls boost-1.34.1 boost_units on my laptop running Debian Etch: $ uname -a Linux babylon5 2.6.18-5-686 #1 SMP Wed Oct 3 00:12:50 UTC 2007 i686 GNU/Linux $ g++ --version g++ (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) After defining the environment variable: BOOST_BUILD_PATH=<absolute_path_to_boost-1.34.1>/tools/build/v2 and creating the following user-config.jam in $BOOST_BUILD_PATH, I was able to build the boost libraries itself, and the HTML and PDF documentation from their Boost.Book and Quickbook sources: #### Begin user-config.jam #### using gcc : 4.1 : g++-4.1 ; using xsltproc : "/usr/bin/xsltproc" ; using boostbook : "/usr/share/xml/docbook/stylesheet/nwalsh/" : "/usr/share/xml/docbook/schema/dtd/4.2" ; using doxygen : "/usr/bin/doxygen" ; using fop : "/usr/bin/fop" : "/usr/lib/jvm/java-6-sun-1.6.0.00" ; ##### End user-config.jam ##### I have to admit that I don't fully understand yet the boost.build system, but I achieved to create the necessary Jamroot file in boost_units/ (my working copy of the units library). It contains only #### Begin of Jamroot #### use-project boost : ../boost-1.34.1 ; ##### End of Jamroot ##### Then I was able to build the tests in libs/units/test and libs/units/test_headers. All tests in tests in libs/units/test and only the test for non_si_units.hpp fails in libs/units/test_headers. Judging from the #define error in this header, it seems to be expected. But running bjam in the libs/units/doc directory fails after outputting several times: runtime error: file /home/maehne/build/boost-1.34.1/tools/boostbook/xsl/docbook.xsl line 338 element element xsl:element: The QName 'xi:include' has no namespace binding in scope in the stylesheet; this is an error, since the namespace was not s pecified by the instruction itself. There are also a lot of warnings like: warning: cannot find header `boost/units/operators.hpp' warning: cannot find header `boost/units/systems/trig.hpp' Cannot find class named 'boost::units::unit' Cannot find class named 'boost::units::quantity' I've seen on the Boost developers mailing list, that there were previously problems with Boost.Book discussed as in the thread from "[units] Boost.Book problems" from August 2007 <http://lists.boost.org/Archives/boost/2007/08/126004.php>. I also tried to use boost-trunk from the SVN repository (revision 41797). But then I seem to run into the same error, which was posted by John Maddock <http://lists.boost.org/Archives/boost/2007/08/126031.php> in the above mentioned thread: Generate XML output for dir /home/torsten/build/boost-units/boost/ Generate XML output for dir /home/torsten/build/boost-units/boost/units/systems/physical_dimensions/ Generate XML output for dir /home/torsten/build/boost-units/boost/units/systems/ Generate XML output for dir /home/torsten/build/boost-units/boost/units/ [1]+ Done rm -f "bin/gcc-4.2.2/debug/dimensions_reference-xml/*.xml" xslt-xsltproc bin/gcc-4.2.2/debug/dimensions_reference-xml.doxygen xslt-xsltproc bin/gcc-4.2.2/debug/dimensions_reference-xml.boostbook warning: failed to load external entity "Reference" cannot parse Reference XML_CATALOG_FILES=../../../../boost-trunk/bin.v2/boostbook_catalog.xml export XML_CATALOG_FILES "/usr/bin/xsltproc" --stringparam boost.doxygen.reftitle ""Dimensions Reference"" --xinclude -o "bin/gcc-4.2.2/debug/dimensions_reference-xml.boostbook" "/home/torsten/build/boost-trunk/tools/boostbook/xsl/doxygen/doxygen2boostbook.xsl" "bin/gcc-4.2.2/debug/dimensions_reference-xml.doxygen" ...failed xslt-xsltproc bin/gcc-4.2.2/debug/dimensions_reference-xml.boostbook... ...skipped <p.>dimensions_reference.xml for lack of <pbin/gcc-4.2.2/debug>dimensions_reference-xml.boostbook... ...skipped <pbin/gcc-4.2.2/debug>units.docbook for lack of <p.>trig_reference.xml... ...skipped <phtml>standalone_HTML.manifest for lack of <pbin/gcc-4.2.2/debug>units.docbook... ...failed updating 7 targets... ...skipped 10 targets... ...updated 64 targets... Exit 1 Am I doing something wrong or am I facing a bug in the Boost.Units, Boost.Book or QuickBook? Could maybe someone, who succeeded to build the Boost.Units documentation, send it to me in HTML or PDF format? Best regards, Torsten Mähne

2 2

Problem in using bundled properties with transitive closure
by abhishek.v＠tcs.com 07 Dec '07

07 Dec '07

Hi I m able to use the transitive closure using simple definition of adj_list as typedef adjacency_list <setS, vecS, bidirectionalS, property <vertex_name_t, std::string>, property <edge_weight_t, int> > Graph; and then calling transitive_closure(g, TC); graph_traits <Graph>::vertex_iterator vi, vend; for (tie(vi, vend) = vertices(TC); vi != vend; ++vi) { file_op << "\n " << vertices_name[*vi] ; } Gives me correct output. o/p :- A B C D Where A,B,C,D represent name of the vertices But when i try to the graph in bundled properties like struct Process { string name; }; typedef adjacency_list <setS, vecS, bidirectionalS,Process, property <edge_weight_t, int> > Graph; transitive_closure(g, TC); graph_traits <Graph>::vertex_iterator vi, vend; for (tie(vi, vend) = vertices(TC); vi != vend; ++vi) { file_op << "\n " << TC[*vi].name ; } Gives me correct output. o/p :- Means in the second case it returns me empty string for the name of the vertices what could be the reason for this. Kindly help Thanks in Advance Abhishek Vyas =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

1 0

[BGL] Property Map Types
by David A. Greene 07 Dec '07

07 Dec '07

When I define an adjacency_list with vecS for the VertexList and use bundled properties to store attributes, what is the time complexity of invoking operator[] on the graph object? Is it constant-time, logarithmic or something else? In other words, what's the underlying data structure used to store the mapping from vertex descriptor to bundle? I've been trying to play around with changing this data structure by specializing property_map and property_traits, something like this: // Define the graph and properties class vertex_property_bundle { ... }; // Define the property tag struct vertex_bundle_property_tag { typedef boost::vertex_property_tag kind; }; typedef boost::property<vertex_bundle_property_tag, vertex_property_bundle> vertex_property_type; typedef boost::adjacency_list<boost::vecS, // Out edge list type boost::vecS, // Vertex list type boost::undirectedS, vertex_property_type // Vertex properties // Edge properties > graph_type; // Specialize the graph property map to be a vector for // vecS vertex lists to make lookup faster template<typename EdgeListType, typename DirectedType> struct property_map<boost::adjacency_list< EdgeListType, vecS, DirectedType, vertex_property_type >, vertex_property_type> { typedef boost::adjacency_list< EdgeListType, vecS, DirectedType, vertex_property_type> graph_type; typedef std::vector<vertex_property_type> type; }; template <typename T> struct property_traits<std::vector<T> > { typedef unsigned long int key_type; typedef T value_type; typedef boost::lvalue_property_map_tag category; }; // overloads of the property map functions for vectors template<typename T> void put(vector<T> &pmap, unsigned long int k, const T& val) { if (pmap.size() <= k) { pmap.resize(k); } pmap[k] = val; } template<typename T> T& get(vector<T> &pmap, unsigned long int k) { assert(k < pmap.size() && "Property map overflow"); return pmap[k]; } template<typename T> const T& get(const vector<T> &pmap, unsigned long int k) { assert(k < pmap.size() && "Property map overflow"); return pmap[k]; } This isn't all compiling yet, but am I on the right track? Is this how things should be done for bundled properties? The documentation is very sparse here. I have a code that is spending significant time looking up properties and I'd like to optimize it as much as possible. Thanks for helping. -Dave

3 8

[GCC-XML] errors with boost header files
by Jenny Duan (TT) 06 Dec '07

06 Dec '07

Gccxml does not seem to be able to handle the boost/mpl/and.hpp file. I have the most recent gccxml (retrieved the source tree and built it) and 1.34.1 boost. I was told by GCCXML support that boost/config/compiler/gcc_xml.hpp needs to exist in order for GCXXML to process boost header files and this file does exist. Please see the content of it below. Can somebody please tell me why it's not working for me? Your help would be greatly appreciated. Thanks, Jenny ----------------------------------------------------------- // Copyright Aleksey Gurtovoy 2000-2004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/boost/mpl/and.hpp,v $ // $Date: 2004/09/02 15:40:41 $ // $Revision: 1.5 $ #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/bool.hpp> # include <boost/mpl/aux_/nested_type_wknd.hpp> # include <boost/mpl/aux_/na_spec.hpp> # include <boost/mpl/aux_/lambda_support.hpp> // agurt, 19/may/04: workaround a conflict with <iso646.h> header's // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(and)' // has to be checked in a separate condition, otherwise GCC complains // about 'and' being an alternative token #if defined(_MSC_VER) #if defined(and) # pragma push_macro("and") # undef and # define and(x) #endif #endif # define BOOST_MPL_PREPROCESSED_HEADER and.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> #if defined(_MSC_VER) #if defined(and) # pragma pop_macro("and") #endif #endif #else # define AUX778076_OP_NAME and_ # define AUX778076_OP_VALUE1 false # define AUX778076_OP_VALUE2 true # include <boost/mpl/aux_/logical_op.hpp> #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_AND_HPP_INCLUDED ------------------------------------------------ $gccxml -fxml-start=./xml_start_symbols.txt --gccxml-gcc-options ./compiler_optons.txt world.h -fxml=world.xml --- snip--- In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:42, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:16: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:16: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:44, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:15: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:15: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/compression.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/stream_integer_wrapper.h: 32, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:55, from ../common/world.h:33: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_crt_defs.h:3 2:2: error: #error _USE_32BIT_TIME_T must be defined for TT applications In file included from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/tt_systypes.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/streamable.h:38, from ../common/world.h:34: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:3 1:2: error: #error you must include tt_win_defs.h as the first header file in all compilands to ensure correct settings. G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 5:21: error: afx.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 6:24: error: afxwin.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 7:23: error: afxmt.h: No such file or directory In file included from C:/Program Files/Microsoft Visual Studio 8/VC/include/fvec.h:43, from C:/Program Files/Microsoft Visual Studio 8/VC/include/dvec.h:37, from C:/Program Files/Microsoft Visual Studio 8/VC/include/intrin.h:31, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/interlocked.h:29, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/TTCriticalSectionBa se.h:30, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/ttcriticalsection.h :28, from ../common/world.h:38: C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "+" and "0" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "+" and "1" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:221:1: error: pasting "&" and "vec" does not give a valid preprocessing token --- snip---

1 0

shared_ptr and -> operator
by Damien Hocking 06 Dec '07

06 Dec '07

All, I'm replacing some standard C++ pointers with shared_ptrs. I've run into a small problem using shared_ptr with a pointer to member. With a really simple class: class TestObject{ public: TestObject():value_(-5.4){} ~TestObject(); double value_; }; Trying this: double TestObject::*dptr = 0; shared_ptr<TestObject> testPtr = shared_ptr<TestObject>(new TestObject()); testPtr->*dptr = 5.7456; On VS2005, I get an error on the ->*: error C2296: '->*' : illegal, left operand has type 'boost::shared_ptr<T>' This line is fine: (*testPtr).*dptr = 5.7456; Can anyone tell me why the compiler isn't converting boost::shared_ptr<TestObject> to a TestObject* through shared_ptr::operator-> ? I can live with dereferencing the testPtr, but I'd like to understand what's going on. Damien

3 3

boost::bind upgrading from 1.33.1 to 1.34.1 problem, part2
by sj＠sjcomp.com 06 Dec '07

06 Dec '07

Hello, Thanks Eric and Peter for the help with my previous question. Now I have another question. 1.34.1 does not allow me to compile the following code (it was fine on 1.33.1): struct CNode {void GetName(){}}; int main(int argc, char **argv){ typedef std::map<int, CNode> TPNodes; TPNodes Children; std::for_each( Children.begin(), Children.end(), boost::bind( &CNode::GetName, // Problem here boost::bind(&TPNodes::value_type::second,_1))); return 0; } I get this error: error C2440: 'argument' : cannot convert from 'const CNode *__w64 ' to 'CNode *const ' c:\src\boost_1_34_1\boost\bind\mem_fn_template.hpp 35 The code works if I have a map with pointers, but if I have instances then I have the error. It looks like I get a const value which was fine when a pointer was used. The question is how do I use algorithm on maps when I want to use only key or value? Thanks. -- Regards, Alexander. http://sjcomp.com

2 1

Boost & Singletons?
by Robert Dailey 05 Dec '07

05 Dec '07

Hi, I was wondering if the boost library had a class that I could derive my classes from to declare a singleton. For example: class MyClass : public boost::singleton<MyClass> {}; Something like that. I noticed there's a singleton.hpp in "boost\pool\detail", however this seems like an odd place for such a common and useful class. I'm actually a bit scared to use anything in a 'detail' folder, as usually (at least to me) that means private code or implementation details (not to be used). Is there a singleton type class in boost to help simplify the process of creating a singleton? Thanks.

5 10

shared_from_this from constructor
by Daniel P Furlani 05 Dec '07

05 Dec '07

Is there a way to call shared_from_this() from a constructor? It seems like a bad idea. Since the object is still being created, it would be difficult for anything to have a shared_ptr to it. And that violates a documented precondition of shared_from_this(): "There must exist at least one shared_ptr instance p that owns t." If it's not possible or just a bad idea, how about a note in the documentation at: http://www.boost.org/libs/smart_ptr/enable_shared_from_this.html to say something like: "Calling shared_from_this from a constructor will not work, since there is no shared_pointer which owns the object."? -dan

1 0

Re: [Boost-users] [asio] how to specify a timeout?
by Andrea Bartoli 05 Dec '07

05 Dec '07

Use an asio::deadline_timer Example: asio::io_service m_ioService; asio::deadline_timer * m_timer; m_timer = new asio::deadline_timer(m_ioService); m_timer->expires_from_now( boost::posix_time::seconds(t) ); m_timer->async_wait( boost::bind(&Foo:handle_timeout, this, asio::placeholders::error) ); asio::async_read( *m_socket, asio::buffer( m_msg.header(), m_msg.header_length() ), boost::bind(&Foo::handle_read_header, this, asio::placeholders::error) ); This is a cut and paste from my code, if it isn't so clear I'll explain deeply. Tks ----- Messaggio originale ----- Da: Arkadiy Vertleyb <vertleyb(a)hotmail.com> A: boost-users(a)lists.boost.org Inviato: Lunedì 3 dicembre 2007, 20:05:15 Oggetto: [Boost-users] [asio] how to specify a timeout? Hi all, Is it possible in asio to supply a timeout for a read/write operation? Thanks, Arkadiy _________________________________________________________________ You keep typing, we keep giving. Download Messenger and join the i’m Initiative now. http://im.live.com/messenger/im/home/?source=TAGLM _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ___________________________________ L'email della prossima generazione? Puoi averla con la nuova Yahoo! Mail: http://it.docs.yahoo.com/nowyoucan.html

3 3

boost [pointer container, lambda, bind]
by chun ping wang 05 Dec '07

05 Dec '07

Say lets say i have container of regular type T. And lets say i want to insert them into ptr_vector by getting the keys. template< typename MapType, typename OutputIterator > OutputIterator getKeys(const MapType& map, OutputIterator out ) { typedef typename MapType::value_type map_type; typedef typename OutputIterator::value_type out_type; std::for_each(map.begin(), map.end(), boost::lambda::var(*out)++ = boost::lambda::construct<out_type>(boost::lambda::bind(&map_type::first, boost::lambda::_1)) ); return out; } Is it possble to do this. Assuming outputiterator is implemented for ptr_vector.

2 1

[review] Fast track formal review of Forward library begins today
by John Torjo 05 Dec '07

05 Dec '07

Hi all, The formal review of the Boost.Functional/Forward library, proposed by Tobias Schwinger, begins today : Boost.Functional/Forward provides decorator function objects to have an n-ary, generic function object accept both RValues and mutable LValues. An exponential number of overloads is needed with C98, so redundant solutions are highly undesirable. Functional/Forward is a reusable implementation asking to live in a central place in Boost. Download it from here: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… http://www.boost-consulting.com/vault/index.php?&direction=0&order=&directo… The documentation is included in the .zip file, in the usual place: forward/libs/functional/forward/doc/html/index.html What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. We're looking forward to your evaluation of this Boost candidate! John Torjo - Review Manager - -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

6 8

Re: [Boost-users] build boost.python tutorial "hello world" without bjam
by damny＠web.de 05 Dec '07

05 Dec '07

thanks for your replay, but nothing happens when i reorder the compile command. like before, the same error messages appear. are there any other ideas? i'm at a loss. daniel > -----Ursprüngliche Nachricht----- > Von: boost-users(a)lists.boost.org > Gesendet: 03.12.07 09:50:12 > An: boost-users(a)lists.boost.org > Betreff: Re: [Boost-users] build boost.python tutorial "hello world" without bjam > > damny(a)web.de wrote: > > hi there, > > > > for some days i try to build the boost.python tutorial "hello world" without bjam on winxp by using mingw. > > so i wrote a *.bat-file: > > > > // --- snip ----------------------------------------------------------------------------- > > @echo off > > SETLOCAL > > SET DIR_MINGW=c:\development_compiler\mingw\ > > SET DIR_BOOST=c:\development_compiler\_boost\ > > SET DIR_PYTHN=c:\development_compiler\python25\ > > SET DIR_PRJCT=%~dp0 > > SET NME_PRJCT=hello > > SET CC=c:\development_compiler\mingw\bin\g++.exe > > SET INCL=-I%DIR_BOOST%include\boost-1_34_1 -I%DIR_PYTHN%include -I%DIR_MINGW%include > > SET LIBS=-L%DIR_BOOST%lib -L%DIR_PYTHN%libs -L%DIR_MINGW%lib > > %CC% -O0 -shared %INCL% %LIBS% -lboost_python-mgw34-s-1_34_1 -lpython25 ^ > > %DIR_PRJCT%%NME_PRJCT%.cpp -o %NME_PRJCT%.pyd > > ENDLOCAL > > // --- snip ----------------------------------------------------------------------------- > > > > this works fine. but nevertheless it produces errors. > > > > // --- snip ----------------------------------------------------------------------------- > > D:\Temp\boost_test>c:\development_compiler\mingw\bin\g++.exe -O0 - shared -Ic:\development_compiler\_boost\include\boost-1_34_1 -Ic:\development_compiler\python25\include -Ic:\development_compiler\mingw\include -Lc:\development_compiler\_boost\lib -Lc:\development_compiler\python25\libs -Lc:\development_compiler\mingw\lib -lboost_python-mgw34-mt-s-1_34_1 -lpython25 D:\Temp\boost_test\hello.cpp -o hello.pyd > > This is just a wild guess, but what happens when you reorder your compile > command, putting the libraries _after_ the source file, like this: > > g++.exe -O0 - shared \ > -Ic:\development_compiler\_boost\include\boost-1_34_1 \ > -Ic:\development_compiler\python25\include \ > -Ic:\development_compiler\mingw\include \ > D:\Temp\boost_test\hello.cpp \ > -Lc:\development_compiler\_boost\lib \ > -Lc:\development_compiler\python25\libs \ > -Lc:\development_compiler\mingw\lib \ > -lboost_python-mgw34-mt-s-1_34_1 -lpython25 \ > -o hello.pyd > > [...] > > Markus > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > _______________________________________________________________________ Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 3 Monate kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220

2 1

boost::bind upgrading from 1.33.1 to 1.34.1 problem
by sj＠sjcomp.com 05 Dec '07

05 Dec '07

Hello, I'm upgrading from boost 1.33.1 to 1.34.1 and upgrade does not let me compile the following code: // CRefCounted provides functionality to CRefPtr to have // referenced pointers struct CNode: public CRefCounted { void GetName(){} }; int main(int argc, char **argv){ typedef CRefPtr<CNode> CPNode; typedef std::multimap<std::string, CPNode> TPNodes; TPNodes Children; std::for_each( Children.begin(), Children.end(), boost::bind( &CNode::GetName, // problem in the next line boost::bind(&TPNodes::value_type::second,_1))); return 0; } I get the following messages from MSVC8.0: error C2784: 'T *boost::get_pointer(const boost::shared_ptr<T> &)' : could not deduce template argument for 'const boost::shared_ptr<T> &' from 'const CPNode' error C2784: 'T *boost::get_pointer(const std::auto_ptr<_Ty> &)' : could not deduce template argument for 'const std::auto_ptr<_Ty> &' from 'const CPNode' error C2784: 'T *boost::get_pointer(T *)' : could not deduce template argument for 'T *' from 'const CPNode' If I replace CRefPtr with boost::shared_ptr the code compiles. Hence I assume the problem is with the way I implemented CRefPtr class. Here it is: template<typename T> class CRefPtr { private: T* m_ptr; public: CRefPtr(T* ptr=NULL) :m_ptr(NULL){ *this=ptr; } CRefPtr(const CRefPtr<T>& ptr) :m_ptr(NULL){ *this=ptr; } ~CRefPtr() { if (m_ptr) { m_ptr->DecrementReference(); m_ptr=NULL; } } CRefPtr<T>& operator=(T* ptr) { if(ptr!=m_ptr) { if(m_ptr) { m_ptr->DecrementReference(); } m_ptr=ptr; if(m_ptr) { m_ptr->IncrementReference(); } } return *this; } CRefPtr<T>& operator=(const CRefPtr<T>& ptr){*this=ptr.m_ptr;return *this;} T* operator->() const{return m_ptr;} T& operator*() const{return *m_ptr;} bool operator<(const CRefPtr<T>& obj)const{if(obj.m_ptr<this->m_ptr)return true;else return false;} T* get() const{return m_ptr;} operator T*()const{return m_ptr;} }; What am I missing? Some explanation on why I went this route. I am using CRefPtr instead of shared_ptr because full CNode class has a member CNode* m_Parent. I could not figure out how to use weak pointers, but if I use CRefPtr I can assign a simple pointer returned by GetParent() to a CPNode and it would still work, while I could not achieve this result with shared_ptr. Maybe someone can direct me to a place which explains how to handle such situations properly with shared_ptr. Thanks. -- Regards, Alexander. http://sjcomp.com

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Re: [Boost-users] [asio] how to specify a timeout?
by Andrea Bartoli 05 Dec '07

05 Dec '07

Yes, timeout and read event have two different callback, in read callback you have to m_timer->cancel() to avoid receive timeout also. ----- Messaggio originale ----- Da: Arkadiy Vertleyb <vertleyb(a)hotmail.com> A: boost-users(a)lists.boost.org Inviato: Martedì 4 dicembre 2007, 16:14:40 Oggetto: Re: [Boost-users] [asio] how to specify a timeout? Hello Andrea, "Andrea Bartoli" <bartols2000(a)yahoo.it> wrote > Use an asio::deadline_timer > > Example: > > asio::io_service m_ioService; > asio::deadline_timer * m_timer; > m_timer = new asio::deadline_timer(m_ioService); > > m_timer->expires_from_now( boost::posix_time::seconds(t) ); > m_timer->async_wait( boost::bind(&Foo:handle_timeout, this, > asio::placeholders::error) ); > asio::async_read( *m_socket, > asio::buffer( m_msg.header(), > m_msg.header_length() ), > boost::bind(&Foo::handle_read_header, > this, asio::placeholders::error) ); Thanks for your response. Still, it's not clear to me how to use it. In your example it seems that read operation and timeout are two independent things. How do I make sure only one of these two fires? Is it possile to cancel read operation once timout has been recieved? Thanks, Arkadiy _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ___________________________________ L'email della prossima generazione? Puoi averla con la nuova Yahoo! Mail: http://it.docs.yahoo.com/nowyoucan.html

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Re: [Boost-users] Building Boost 1.33.0 with bjam --v2 failes underHP-UX 11.23
by Vinokurov, Aleksandr 05 Dec '07

05 Dec '07

"Vladimir Prus" <ghost(a)cs.msu.su> wrote in message news:<fj3pej$14q$1(a)ger.gmane.org>... > Vinokurov, Aleksandr wrote: > > > > > > > Hello all, > > > > I'm trying to build boost 1.33 64-bit libraries under HP-UX 11.23 with the > > help of gcc 4.1.1 thru bjam. I was confused trying to supply -mlp64 > > compiler and linker option to the gcc though bjam options. By default > > calling ``bjam'' uses Boost.Build v.1, and setting ``bjam --v2'' -- will > > do v.2. Uncommenting "using gcc ;" in ./tools/build/v2/ user-config.jam > > file led bjam to "learn" this toolset, but calling ``bjam --v2'' from the > > boost_1_33_0/ folder splashes this: > > > > # bjam --v2 gcc > > ... > > > warning: Python location is not configured > > warning: the Boost.Python library won't be built > > Building Boost.Regex with the optional Unicode/ICU support disabled. > > Please refer to the Boost.Regex documentation for more information > > (and if you don't know what ICU is then you probably don't need it). > > /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:868: > > in virtual-target.register-actual-name from module virtual-target error: > > Duplicate name of actual target: > > <pstage>libboost_date_time-gcc-d-1_33.so.1.33.0 error: previous virtual > > target { > > common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { > > .... > > > Finally the only way to get this 64-bit libs was this hack: ``GXX="g++ > > -mlp64" bjam''. Does anybody knows what the heck is with the bjam --v2 and > > why it is unable to build boost from-the-box? > > Probably an answer with a question is in order -- what's the heck with trying > to build outdated version of Boost, in the first place? Second, Boost.Build > V2 is officially used started with 1.34. Surely, even if had bug in 1.33, > nobody's going to fix that. > > - Volodya > Okay: 1. I have no free time (just now) to spend upgrading my current project from Boost 1.33 to latest one and finding/fixing misplaces and new bugs. 2. If Boost.Build v2 official release was in 1.34, why it was shipped with Boost 1.33 archive? And there are no documentation (looked on the site) on how to force compiler option when using v1 Boost.Build? Sincerely yours, Aleksandr > > > > > > Aleksandr. > > > > > > PS. This is my gcc version, but seems it is not clued anyway: > > > > # gcc -v > > Using built-in specs. > > Target: ia64-hp-hpux11.23 > > Configured with: ../gcc/configure > > Thread model: posix > > gcc version 4.1.1

1 0

Iterator over values of std::map<K, V>
by John Kiopela 04 Dec '07

04 Dec '07

Hi all, I have been browsing through the docs, but I couldn't find anything useful. Does Boost have a std::map<K, V>::iterator adaptor which iterates over the values of the map only. That is, I would like to have an iterator of which operator*() function returns V, instead of std::pair<K, V>. My data is stored in a std::map<K, V> and I would to allow my users to iterate over the values. If it's not here, I'll make one myself. It shouldn't be that hard. Thanks in advance. Kind regards, John

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Building Boost 1.33.0 with bjam --v2 failes under HP-UX 11.23
by Vinokurov, Aleksandr 04 Dec '07

04 Dec '07

Hello all, I'm trying to build boost 1.33 64-bit libraries under HP-UX 11.23 with the help of gcc 4.1.1 thru bjam. I was confused trying to supply -mlp64 compiler and linker option to the gcc though bjam options. By default calling ``bjam'' uses Boost.Build v.1, and setting ``bjam --v2'' -- will do v.2. Uncommenting "using gcc ;" in ./tools/build/v2/ user-config.jam file led bjam to "learn" this toolset, but calling ``bjam --v2'' from the boost_1_33_0/ folder splashes this: # bjam --v2 gcc warning: Python location is not configured warning: the Boost.Python library won't be built Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:868: in virtual-target.register-actual-name from module virtual-target error: Duplicate name of actual target: <pstage>libboost_date_time-gcc-d-1_33.so.1.33.0 error: previous virtual target { common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.link.dll-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.compile.c++-greg_month.o.OBJ { gregorian/greg_month.cpp.CPP } } { gcc%gcc.compile.c++-greg_weekday.o.OBJ { gregorian/greg_weekday.cpp.CPP } } { gcc%gcc.compile.c++-date_generators.o.OBJ { gregorian/date_generators.cpp.CPP } } } } error: created from ./stage error: another virtual target { common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.link.dll-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.compile.c++-greg_month.o.OBJ { gregorian/greg_month.cpp.CPP } } { gcc%gcc.compile.c++-greg_weekday.o.OBJ { gregorian/greg_weekday.cpp.CPP } } { gcc%gcc.compile.c++-date_generators.o.OBJ { gregorian/date_generators.cpp.CPP } } } } } error: created from ./stage error: added properties: none error: removed properties: none /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:175: in actualize-no-scanner from module object(file-target)@269 /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:110: in object(file-target)(a)269.actualize from module object(file-target)@269 /home/avinokur/boost_1_33_0/tools/build/v2/build-system.jam:285: in load from module build-system /home/avinokur/boost_1_33_0/tools/build/v2/kernel/modules.jam:259: in import from module modules /home/avinokur/boost_1_33_0/tools/build/v2/kernel/bootstrap.jam:153: in boost-build from module /home/avinokur/boost_1_33_0/boost-build.jam:12: in module scope from module Calling v.1 Boost.Built with "cxxflags=-mlp64" got no luck too: # bjam cxxflags=-mlp64 --------------------------------------------------------------------- *** If you don't need Boost.Python, you can ignore this section *** *** pass --without-python to suppress this message in the future *** skipping Boost.Python library build due to missing or incorrect configuration couldn't find Python.h in "/usr/local/include/python2.2" You can configure the location of your python installation by setting: PYTHON_ROOT - currently "/usr/local" PYTHON_VERSION - The 2-part python Major.Minor version number (e.g. "2.2", NOT "2.2.1") - currently "2.2" The following are automatically configured from PYTHON_ROOT if not otherwise set: PYTHON_LIB_PATH - path to Python library object; currently "/usr/local/lib/python2.2/config" PYTHON_INCLUDES - path to Python #include directories; currently "/usr/local/include/python2.2" --------------------------------------------------------------------- Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). don't know how to make cxxflags=-mlp64 ...found 1 target... ...can't find 1 target... Finally the only way to get this 64-bit libs was this hack: ``GXX="g++ -mlp64" bjam''. Does anybody knows what the heck is with the bjam --v2 and why it is unable to build boost from-the-box? Aleksandr. PS. This is my gcc version, but seems it is not clued anyway: # gcc -v Using built-in specs. Target: ia64-hp-hpux11.23 Configured with: ../gcc/configure Thread model: posix gcc version 4.1.1

3 2

C++ Performance
by nisha kannookadan 04 Dec '07

04 Dec '07

Hi everybody Im a quite new boost user and I wonder, why C++ Program is so slow. I wrote a program, and I have the same program in Matlab, I expected that my C++ version is much faster, but its not. I use matrices, vectors, matrix- and vector proxies. Do some solving and compute calculations with prod, element_div, etc.. Is boost in general slower than matlab, should I use something else? Id be real happy about any help. Regards Nisha K PS: This question was already in the developer forum. _________________________________________________________________ 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…

9 22

program_options: Printing description problem
by sj＠sjcomp.com 03 Dec '07

03 Dec '07

Hello, When I try to output options_description to cout (response to --help option, to show all available options) I get an assertion in in xstring header file. It's caused by execution format_paragraph function in option_description.cpp line 381. I narrowed down the problem to the length of the description for an option. This is the code: #include <boost/program_options.hpp> namespace po = boost::program_options; int main(int argc, char **argv){ po::options_description desc("t"); desc.add_options()("h", "1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZ"); po::variables_map vm; po::store(po::parse_command_line(argc, argv, desc), vm); po::notify(vm); if(vm.count("h")){std::cout<<desc<<"\n"; return 1;} return 0; } If I remove last Z in the description of h parameter the program works, otherwise it crashes. If I replace the message with some words, meaning if spaces are present, it still crashes (that's how I originally discovered the problem). What am I doing wrong, or how can I avoid this situation (other than decreasing the length of the descriptions for all of my parameters). I'm using boost 1.33.1 (how can I find out what was done to program_options in 1.34.1?) and Microsoft Visual Studio 2005 Professional. The project is compiled as Multi-threaded DLL Thanks. -- Regards, Alexander. http://sjcomp.com

2 1

Problems with boost::parameter macros &
by StephQ 03 Dec '07

03 Dec '07

I have the following 3 problems: 1) I can not use BOOST_PARAMETER_MEMBER_FUNCTION (and the const version) inside a template class. The following code: #include <boost/parameter.hpp> BOOST_PARAMETER_NAME(mu) BOOST_PARAMETER_NAME(sigma) template<class T1> class mah { private: int t1; int t2; public: BOOST_PARAMETER_MEMBER_FUNCTION( (void), set, tag, (optional (mu, *, 1) (sigma, *, 2) ) ) { t1 = mu; t2 = sigma; } }; int main() { mah<int> chissa; chissa.set( 2, 1 ); } Results in (with MSVC, similar error with gcc 3.4 cygwin): 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : warning C4346: 'boost::parameter::aux::argument_pack<mah<T1>:: boost_param_params_27set<int>>::type' : dependent name is not a type 1> prefix with 'typename' to indicate a type 1> c:\develop\essl_alpha\essl\test\parametertest1.cpp(32) : see reference to class template instantiation 'mah<T1>' being compiled 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : error C2923: 'mah<T1>::boost_param_result_27set' : 'boost::parameter::aux::argument_pack<mah<T1>:: boost_param_params_27set<int>>::type' is not a valid template type argument for parameter 'Args' 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : warning C4346: 'mah<T1>::boost_param_result_27set::type' : dependent name is not a type 1> prefix with 'typename' to indicate a type 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : error C2146: syntax error : missing ';' before identifier 'set' 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : warning C4183: 'set': missing return type; assumed to be a member function returning 'int' 2) I would like to create a class template for a "named tuple", something like: named_tuple<int,double,mu,sigma> n; // mu, sigma previously declared, maybe BOOST_PARAMETER_NAME? // should contain two variables of type int, double. Would be really nice if they are named exactly _mu and _sigma, so I need boost PP or something? n.set( _mu=1, _sigma=2.0 ); // set internal variables n.set( _mu=1 ); double x = n.get( _sigma ); n.get( _mu, _sigma ); // This returns a tuple with the internal values. I think a class like this could be really usefull, and it would be really nice to see tuples get this extension. IMHO they are very clear from a user point of view. The problem (apart from problem 1) is that the macro BOOST_PARAMETER_MEMBER_FUNCTION does not play nicely if I just put a template parameter (say N1 of named_tuple<T1,T2,N1,N2>) instead of mu in BOOST_PARAMETER_MEMBER_FUNCTION( (void), set, tag, (optional (mu, *, 1) (sigma, *, 2) ) Again I suspect I need boost PP or use directly ArgumentPack. 3) How should I consider the overloading of a BOOST_PARAMETER_MEMBER_FUNCTION? Is it fine to just write the following? class mah2 : public mah // mah as before but with no templates. { public: template<class A1, class A2> void set( A1 a1, A2 a2 ) // need to supply defaults here... { mah<int,int>::set( a1, a2 ); } }; As usual any help is extremely appreciated. Thank you in advance. Best Regards StephQ

1 0

[asio] how to specify a timeout?
by Arkadiy Vertleyb 03 Dec '07

03 Dec '07

Hi all, Is it possible in asio to supply a timeout for a read/write operation? Thanks, Arkadiy _________________________________________________________________ You keep typing, we keep giving. Download Messenger and join the i’m Initiative now. http://im.live.com/messenger/im/home/?source=TAGLM

1 0

The Memory leak occurs with intrusive_ptr<T> and a class which containing wstring member variable.
by Youhei Murakami 03 Dec '07

03 Dec '07

Hello everyone. I had met a memory leak error runnnin program generated from a source which is attached to this mail. [flow] --The "sampleclass"-class has a wstring object as a member variable and a setter and a getter for this variable. --A sampleclass instance generated by the default new. --A pointer to sampleclass instance attached to intrusive_ptr<sampleclass>. --Make wstring instance with string L"0123456789abcdef". --The wstring instance set to a sampleclass instance using the sampleclass's setter. --Finish this program and a memory leak occurs. [emvironment] WindowsXP 64bit VisualStudio2005 sp1 boost-1_34_1 Unicode Charset #include "stdafx.h" #include <iostream> #include <boost/intrusive_ptr.hpp> #include <boost/detail/atomic_count.hpp> #include <boost/config.hpp> using namespace std; using namespace boost; #ifdef _DEBUG #define _CRTDBG_MAP_ALLOC #include <stdlib.h> #include <crtdbg.h> #define new ::new(_NORMAL_BLOCK, __FILE__, __LINE__) #endif namespace test { class countable { public: countable() : refcount(0) { } void add_ref( void ) { ++refcount; } void release( void ) { if( 0 == --refcount ) { delete this; } } int getcount() { return static_cast<long>(refcount); } private: boost::detail::atomic_count refcount; }; class sampleclass : public countable { wstring message; public: sampleclass(){} sampleclass( const wstring &mes ) : message(mes) {} void setmessage( const wstring &mes ) { message = mes; } wstring getmessage() { return message; } }; }; namespace boost { using namespace test; inline void intrusive_ptr_add_ref(countable *p) { p->add_ref(); } inline void intrusive_ptr_release(countable *p) { p->release(); } } int _tmain(int argc, _TCHAR* argv[]) { _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF|_CRTDBG_LEAK_CHECK_DF); using namespace test; { intrusive_ptr<sampleclass> intrusive_( new sampleclass(wstring(L"initial")) ); //---------- memory leak prone ------------------------// wstring mes( L"0123456789abcdef" ); intrusive_->setmessage( mes ); //---------- memory leak prone ------------------------// wcout << intrusive_->getmessage().c_str() << endl; } getchar(); return EXIT_SUCCESS; }

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[unordered] Remainder: Unordered review will start December 7
by Ion Gaztañaga 03 Dec '07

03 Dec '07

Hi to all, We have several reviews on December and just between two fast-track reviews, Unordered library will be reviewed December 7-16. For those interested in the library: *Description*: An implementation of the unordered containers specified in TR1, with most of the changes from the recent draft standards. *Author*: Daniel James *Download*: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… The documentation is in the zip file. Regards, Ion

1 0

[boost-users][boost foreach, iterating]
by chun ping wang 03 Dec '07

03 Dec '07

hi, is their anyway where i can use boost foreach to iterate through two different containers at once. Like I have two vector of float and i want to iterate through them parallell.. (not using indexing.. since it doesn't work with all types). Thanks. Something that is equalivent to python, for x,y in xArray, yArray: # do some awesome stuff. print x, y

4 4

Re: [Boost-users] [type_traits] checking if some type is copyconstructible or assignable
by Ovanes Markarian 03 Dec '07

03 Dec '07

I don't believe it as well, since I tried to implement it over the weekend, but I got always stuck, so I thought may be the boost gurus know how to do it ;) Thanks for your answer! Best Regards, Ovanes On 12/3/07, John Maddock <john(a)johnmaddock.co.uk> wrote: > > > > Ovanes Markarian wrote: > > >> Hello all! > > >> > > >> I am wondering, why the type_traits do not have a construct to check > > >> if some type is copy constructible (I mean if the copy constructor > > >> is available (public) or not). > > >> > > >> > > >> May be it can be implemented via calculating at compile time if some > > >> type can be copied or not... May be it is not possible at all. > > > > We don't believe that it's possible in the current language, sorry. Of > > course if you can prove us wrong..... > > > > Regards, John. <http://lists.boost.org/mailman/listinfo.cgi/boost-users> > >

1 0

[type_traits] checking if some type is copy constructible or assignable
by Ovanes Markarian 03 Dec '07

03 Dec '07

Hello all! I am wondering, why the type_traits do not have a construct to check if some type is copy constructible (I mean if the copy constructor is available (public) or not). May be it can be implemented via calculating at compile time if some type can be copied or not... May be it is not possible at all. With Kind Regards, Ovanes

2 1

build boost.python tutorial "hello world" without bjam
by damny＠web.de 03 Dec '07

03 Dec '07

hi there, for some days i try to build the boost.python tutorial "hello world" without bjam on winxp by using mingw. so i wrote a *.bat-file: // --- snip ----------------------------------------------------------------------------- @echo off SETLOCAL SET DIR_MINGW=c:\development_compiler\mingw\ SET DIR_BOOST=c:\development_compiler\_boost\ SET DIR_PYTHN=c:\development_compiler\python25\ SET DIR_PRJCT=%~dp0 SET NME_PRJCT=hello SET CC=c:\development_compiler\mingw\bin\g++.exe SET INCL=-I%DIR_BOOST%include\boost-1_34_1 -I%DIR_PYTHN%include -I%DIR_MINGW%include SET LIBS=-L%DIR_BOOST%lib -L%DIR_PYTHN%libs -L%DIR_MINGW%lib %CC% -O0 -shared %INCL% %LIBS% -lboost_python-mgw34-s-1_34_1 -lpython25 %DIR_PRJCT%%NME_PRJCT%.cpp -o %NME_PRJCT%.pyd ENDLOCAL // --- snip ----------------------------------------------------------------------------- this works fine. but nevertheless it produces errors. // --- snip ----------------------------------------------------------------------------- D:\Temp\boost_test>c:\development_compiler\mingw\bin\g++.exe -O0 - shared -Ic:\development_compiler\_boost\include\boost-1_34_1 -Ic:\development_compiler\python25\include -Ic:\development_compiler\mingw\include -Lc:\development_compiler\_boost\lib -Lc:\development_compiler\python25\libs -Lc:\development_compiler\mingw\lib -lboost_python-mgw34-mt-s-1_34_1 -lpython25 D:\Temp\boost_test\hello.cpp -o hello.pyd C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text+0x11e): undefined reference to `_imp___ZN5boost6python6detail11init_moduleEPKcPFvvE' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZN5boost6python3de fIPFPKcvEEEvS3_T_[void boost::python::def<char const* (*)()>(char const*, char const* (*)())]+0x6e): undefined reference to `_imp___ZN5boost6python6detail17scope_setattr_docEPKcRKNS0_3api6objectES3_' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZN5boost6python6detail17make_function_auxIPFPKcvENS0_21default_call_policiesENS_3mpl7vector1IS4_EE EENS0_3api6objectET_RKT0_RKT1_[boost::python::api::objectboost::python::detail: :make_function_aux<char const* (*)(), boost::python::default_call_policies, boost::mpl::vector1<char const*> >(char const* (*)(), boost::python::default_call_policies const&, boost::mpl::vector1<char const*> const&)]+0x73): undefined refere nce to `_imp___ZN5boost6python7objects15function_objectERKNS1_11py_functionE' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZN5boost6python7objects21py_function_impl_baseC2Ev[boost::python::objects::py_function_impl_base:: py_function_impl_base()]+0x7): undefined reference to `_imp___ZTVN5boost6python7objects21py_function_impl_baseE' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.rdata$_ZTVN5boost6python7objects23caller_py_function_implINS0_6detail6callerIPFPKcvENS0_21default_call_p oliciesENS_3mpl7vector1IS6_EEEEEE[vtable for boost::python::objects::caller_py_function_impl<boost::python::detail::caller<char const* (*)(), boost::python::def ault_call_policies, boost::mpl::vector1<char const*> > >]+0x18): undefined reference to 'boost::python::objects::py_function_impl_base::max_arity() const' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZN5boost6python3api6objectC2Ev[boost::python::api::object::object()]+0x7): undefined reference to `_imp___Py_NoneStruct' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZN5boost6python7objects23caller_py_function_implINS0_6detail6callerIPFPKcvENS0_21default_call_poli ciesENS_3mpl7vector1IS6_EEEEED1Ev[boost::python::objects::caller_py_function_impl<boost::python::detail::caller<char const* (*)(), boost::python::default_call_policies, boost::mpl::vector1<char const*> > >::~caller_py_function_impl()]+0x16) : undefined reference to `_imp___ZN5boost6python7objects21py_function_impl_baseD2Ev' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZN5boost6python7objects23caller_py_function_implINS0_6detail6callerIPFPKcvENS0_21default_call_poli ciesENS_3mpl7vector1IS6_EEEEED0Ev[boost::python::objects::caller_py_function_impl<boost::python::detail::caller<char const* (*)(), boost::python::default_call_policies, boost::mpl::vector1<char const*> > >::~caller_py_function_impl()]+0x16) : undefined reference to `_imp___ZN5boost6python7objects21py_function_impl_baseD2Ev' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZNK5boost6python15to_python_valueIRKPKcEclES5_[boost::python::to_python_value<char const* const&>::operator()(char const* const&) const]+0xf): undefined reference to `_imp___ZN5boost6python9converter19do_return_to_pythonEPKc' C:\DOKUME~1\DBlock\LOKALE~1\Temp/cciAbaaa.o:hello.cpp:(.text$_ZNK5boost6python9type_info4nameEv[boost::python::type_info::name() const]+0x15): undefined reference to `_imp___ZN5boost6python6detail12gcc_demangleEPKc' collect2: ld returned 1 exit status // --- snip ----------------------------------------------------------------------------- any ideas what's wrong? any ideas how to fix that? many, many thnx daniel PS: i build boost.python by doing this ... // --- snip ----------------------------------------------------------------------------- @echo off SETLOCAL SET path=%path%;C:\Development_Compiler\MinGW\Bin bjam.exe -a "-sTOOLS=mingw" "-sGCC_ROOT_DIRECTORY=C:\Development_Compiler\MinGW" "-sPYTHON_VERSION=2.5" "-sPYTHON_ROOT=C:\Development_Compiler\Python25" --build-dir=C:\Temp --toolset=gcc --with-python install ENDLOCAL // --- snip ----------------------------------------------------------------------------- _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066

2 1

Simple Linking Error
by Daniel 03 Dec '07

03 Dec '07

I wrote a simple "Hello, world!" program to test if boost/asio was working correctly: #include <iostream> #include <boost/date_time/posix_time/posix_time.hpp> int main() { std::cout << "Hello, world!\n"; return 0; } But, I get this: (GCC C++ 4.1.2/Linux version 2.6.22-gentoo-r8) test.cpp:(.text+0x10b): undefined reference to `boost::system::get_system_category()' test.cpp:(.text+0x115): undefined reference to `boost::system::get_posix_category()' test.cpp:(.text+0x11f): undefined reference to `boost::system::get_posix_category()' test.cpp:(.text+0x129): undefined reference to `boost::system::get_system_category()' This happens when I used '#include <boost/date_time/posix_time/posix_time.hpp>' I can't figure out what I'm missing

4 15

serialization of vector of pointers
by Stathis 03 Dec '07

03 Dec '07

Hi, What is the right way to serialize/deserialize a container of pointers, e.g. std::vector< int* > ? I want to store the values, not the addresses in this case. Should I just flatten my data and store it in a different fashion, then read the flat data and build my objects with a builder? I ended up storing the size of the container in a separate variable before the data, when serializing. Then when deserializing, I use this size value to scale the container, create new ints, read their individual values via the deserialized data values and finally store them back to the new object. Can you give an example of how to do this better? cheers, --stathis

3 5

[serialization] Can binary-objects be trackable ?
by Youhei Murakami 03 Dec '07

03 Dec '07

Hello everyone. I found a description pasted below in boost/serialization/binary_object.hpp. Does this description means that binary-objects can't track ? [ in binary_object.hpp ] // don't track binary objects - usually they will be created on the stack // and tracking algorithm (which uses the object address) might get // confused. note that these address will likely be members of some // other structure which itself is tracked, so as a practical matter // suppressing tracking shouldn't cause any redundancy. BOOST_CLASS_TRACKING(binary_object, boost::serialization::track_never) #endif // BOOST_SERIALIZATION_BINARY_OBJECT_HPP

2 1

Copying types from a mpl vector to a fusion vector
by Germán Diago 02 Dec '07

02 Dec '07

Hello. I'm trying to build a library and I'm doing heavy use of boost mpl and fusion libraries. I'd like to know a way to fill a boost::fusion::vector<> with the types contained in a boost::mpl::vector. Anyone knows how to do this? The code I have so far: template <class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10> struct Func { //This is the initial sequence typedef typename boost::mpl::vector<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> sequence; //The sequence without NullTypes typedef typename boost::mpl::filter_view<sequence, boost::mpl::not_<boost::is_same<NullType, boost::mpl::_1> > >::type validsequence; //The vector I want to fill with validsequence. Note that this is a fusion vector, not a mpl vector typedef boost::fusion::vector<> voidvector; /***************PROBLEM HERE*******************/ //I want to copy validsequence types into voidvector typedef typename somewaytocopy::type type; }; Thanks in advance.

2 2

[regex] problem with regular expression
by John Kiopela 02 Dec '07

02 Dec '07

Hi all, I am having some troubles with making a regular expression to parse a file of financial data. First, the file looks like this (simplified): BEGIN FINANCIAL INFORMATION 0 4 John (the name is mentioned somewhere between the two tags) 6 3 8 END FINANCIAL INFORMATION BEGIN FINANCIAL INFORMATION 0 David 6 8 END FINANCIAL INFORMATION BEGIN FINANCIAL INFORMATION 2 4 7 4 0 3 John 6 8 END FINANCIAL INFORMATION I want to create a regular expression which gives me all financial informations of John. My first try was: "BEGIN FINANCIAL INFORMATION.*?John.*?END FINANCIAL INFORMATION" The problem here is that the second ".*?" also matches "END FINANCIAL INFORMATION", which means that the following substring is also a match: BEGIN FINANCIAL INFORMATION 0 David 6 8 END FINANCIAL INFORMATION BEGIN FINANCIAL INFORMATION 2 4 7 4 0 3 John 6 8 END FINANCIAL INFORMATION Can somebody please help me with this regular expression? I'm trying to find out how I can type "any character except the string 'END FINANCIAL INFORMATION'", but without succes so far. Thanks in advance. Kind regards, John

2 1

boost-users [boost lambda, boost foreach]
by chun ping wang 02 Dec '07

02 Dec '07

Hi, lets say i have two arbitary container of any stl type. template < class T, template <typename ELEM, typename = std::allocator<ELEM> > class CONT > typename boost::enable_if<boost::is_floating_point<T>, T>::type getManhattanDistance(const CONT<T>& ObjectX, const CONT<T>& ObjectY) I want to be able to iterate through both containers to get the euclidean distance.. i.e. sqrt of sum of each item in ObjectX - ObjectY square. Psuedocode looks like this.. /*********************************************** * getManhattanDistance(ObjectX, ObjectY) * * overAllSum <-- 0 * * for i <-- 0 to sizeof (ObjectX) * * Xn <-- ObjectX[i] * * Yn <-- ObjectY[i] * * difference <-- (Xn - Yn) * -1 * * overAllSum <-- overAllSum + difference * ***********************************************/ but i want to make it as abstract (allowing nonindexable containers) but also clear as possible without losing speed. Whats the best way to do this using boost library.

1 0

Runtime memory corruption occurs when serializing tree-structure as binary-archive.
by Youhei Murakami 02 Dec '07

02 Dec '07

Hello everyone. I tried to compile a code that has written below and I had met runtime error. That error is the memory corruption. A memory corruption occurs when just before exit main function and causes are in binary-serialization, but I don't understand this fenomenon. If someone who knows the reason of this matter, please tell me. [environment] Windows XP 64bit Visual Studio 2005 sp1 boost-1_34_1 #define _SCL_SECURE_NO_WARNINGS #pragma warning(push) #pragma warning(disable: 4267) #pragma warning(disable: 4103) #include <stdio.h> #include <tchar.h> #define CRTDBG_MAP_ALLOC #include <stdlib.h> #include <crtdbg.h> #include <iostream> #include <fstream> #include <cstdlib> #include <vector> #include <boost/shared_ptr.hpp> #include <boost/weak_ptr.hpp> #include <boost/enable_shared_from_this.hpp> #include <boost/serialization/serialization.hpp> #include <boost/serialization/string.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/shared_ptr.hpp> #include <boost/serialization/weak_ptr.hpp> #include <boost/serialization/version.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/tracking.hpp> #include <boost/serialization/is_abstract.hpp> #include <boost/serialization/nvp.hpp> #include <boost/serialization/binary_object.hpp> #include <boost/serialization/split_member.hpp> #define BOOST_LIB_NAME boost_serialization #include <boost/config/auto_link.hpp> #include <boost/archive/binary_iarchive.hpp> #include <boost/archive/binary_oarchive.hpp> #include <boost/serialization/export.hpp> #pragma warning(pop) using namespace std; using namespace boost; using namespace boost::serialization; using namespace boost::archive; namespace test { class nodebase : public enable_shared_from_this<nodebase> { // occurs memory corruption when serializing public: typedef shared_ptr<nodebase> NodePointer; typedef weak_ptr<nodebase> NodeWeakPointer; typedef vector<NodePointer> Children; typedef Children::iterator ChildIterator; typedef vector<NodeWeakPointer> Parents; typedef Parents::iterator ParentIterator; public: nodebase(); nodebase( const string &n ); nodebase( const string &n, const Children &c ); nodebase( const string &n, const Children &c, const Parents &p ); virtual ~nodebase(); private: struct Impl { Impl(); Impl( const string &n ); Impl( const string &n, const Children &v ); Impl( const string &n, const Children &v, const Parents &p ); public: string name; Children children; Parents parents; private: friend class serialization::access; template <class Archive> void serialize( Archive &ar, const unsigned int version ); }; shared_ptr<Impl> pimpl; private: // serialization friend class serialization::access; template <class Archive> void serialize( Archive &ar, const unsigned int version ); public: string getname( void ){ return pimpl->name; } void SetParent( const NodePointer &parent ); void SetParents( const Parents &parents ); NodePointer GetParent( const string &name ); Parents GetParents( void ); Children GetChildren( void ); void AddChild( const NodePointer &child ); void RemoveChild( const NodePointer &child ); void Traverse( void ); private: void Traverse( const NodePointer &root ); }; nodebase::Impl::Impl() { } nodebase::Impl::Impl( const string &n ) : name(n) { } nodebase::Impl::Impl( const string &n, const Children &c ) : name(n), children(c) { } nodebase::Impl::Impl( const string &n, const Children &c, const Parents &p ) : name(n), children(c), parents(p) { } template <class Archive> void nodebase::Impl::serialize( Archive &ar, const unsigned int version ) { ar & make_nvp( "name", make_binary_object( &name, sizeof(name) ) ); ar & make_nvp( "children", make_binary_object( &children, sizeof(children) ) ); ar & make_nvp( "parents", make_binary_object( &parents, sizeof(parents) ) ); } nodebase::nodebase() { } nodebase::nodebase( const string &n ) : pimpl( new Impl( n ) ) { } nodebase::nodebase( const string &n, const Children &c ) : pimpl( new Impl( n, c ) ) { } nodebase::nodebase( const string &n, const Children &c, const Parents &p ) : pimpl( new Impl( n, c, p ) ) { } nodebase::~nodebase() { } template <class Archive> void nodebase::serialize( Archive &ar, const unsigned int version ) { ar & make_nvp( "pimpl", make_binary_object( &pimpl, sizeof(pimpl) ) ); } template void nodebase::serialize<archive::binary_oarchive>( archive::binary_oarchive &ar, const unsigned int version ); template void nodebase::serialize<archive::binary_iarchive>( archive::binary_iarchive &ar, const unsigned int version ); void nodebase::SetParent( const nodebase::NodePointer &p ) { assert( pimpl->parents.size()+1 < 2 ); pimpl->parents.push_back( p ); } nodebase::NodePointer nodebase::GetParent( const string &name ) { for( ParentIterator i = pimpl->parents.begin(); i != pimpl->parents.end(); i++ ){ NodePointer tmp((*i)); if( tmp->getname() == name ) { return tmp; } } return NodePointer(); } nodebase::Parents nodebase::GetParents( void ) { return pimpl->parents; } nodebase::Children nodebase::GetChildren( void ) { return pimpl->children; } void nodebase::AddChild( const nodebase::NodePointer &child ) { child->SetParent( shared_from_this() ); //!!!!ERROR!!!! incur a memory leak this->pimpl->children.push_back( child ); } void nodebase::RemoveChild( const NodePointer &child ) { for( ChildIterator i = pimpl->children.begin(); i != pimpl->children.end(); i++ ){ if( (*i).get() == child.get() ){ pimpl->children.erase( i ); break; } } } void nodebase::Traverse( void ) { Children children = this->GetChildren(); for( ChildIterator i = children.begin(); i != children.end(); i++ ){ Traverse( *i ); } } void nodebase::Traverse( const NodePointer &node ) { if( !node ){ return; } Children children = node->GetChildren(); for( ChildIterator i = children.begin(); i != children.end(); i++ ) { Traverse( *i ); } } class simple_class { // not occur memory corruption when serializing friend class access; string name; template <class Archive> void serialize( Archive &ar, unsigned int ) { ar & name; } }; }; BOOST_CLASS_TRACKING(test::nodebase, boost::serialization::track_always); int _tmain(int argc, _TCHAR* argv[]) { using namespace test; { shared_ptr<nodebase> root( new nodebase(string("root")) ); shared_ptr<nodebase> c1( new nodebase(string("c1")) ); shared_ptr<nodebase> c2( new nodebase(string("c2")) ); shared_ptr<nodebase> c3( new nodebase(string("c3")) ); shared_ptr<nodebase> c4( new nodebase(string("c4")) ); shared_ptr<nodebase> c5( new nodebase(string("c5")) ); c3->AddChild( c5 ); c1->AddChild( c3 ); c2->AddChild( c4 ); root->AddChild( c1 ); root->AddChild( c2 ); root->Traverse(); { // output ofstream ofile( "serialized", ios::binary ); try { boost::archive::binary_oarchive oa( ofile ); oa << BOOST_SERIALIZATION_NVP(root); } catch( boost::archive::archive_exception &e ) { cout << "At the output : " << e.what() << endl; ofile.close(); getchar(); exit(1); } ofile.close(); } shared_ptr<nodebase> in; { // input ifstream ifile( "serialized", ios::binary ); try { boost::archive::binary_iarchive ia( ifile ); ia >> BOOST_SERIALIZATION_NVP(in); in->Traverse(); } catch( boost::archive::archive_exception &e ) { cout << "At the input : " << e.what() << endl; ifile.close(); getchar(); exit(e.code); } ifile.close(); } } getchar(); return 0; }

1 0

Sequence modifying routines??
by John Femiani 01 Dec '07

01 Dec '07

Is there a reason that fusion seems devoid of sequence modifying routines except for the built-in assignment operators? For instance, if I wanted to operate on boost::array, I would seem to have no way to write the results back into an array through fusion (unless I miss something). I am looking for something like copy(input_sequence, output_sequence) -- John Femiani

1 0

BGL : maximum weighted matching
by Alessio Dore 01 Dec '07

01 Dec '07

Dear all, I am implementing an algorithm for which I would need to compute the maximum weighted matching of a bipartite graphs. I have seen that LEDA libraries has this sort of functions but their license is restrictive. BGL allows maximum cardinality matching but, if I understood well, it works for non-weighted graphs. In a previous message on this list it was mentioned that this functionality could have been added but I didn't find it. Is it available? Does anyone of you know if there are other libraries to perform it? Thanks. Regrads, Alessio

2 1

[statechart] context sensitive history
by Chris Paulse 01 Dec '07

01 Dec '07

I have the following requirement: States A and B, where B has two substates B1 and B2. When transition occurs from B to A, and then from A back to B, under some conditions it is desired for B1 to be the initial substate, while in others we would like the substate to be chosen based on B's shallow history. Is there a concise way to obtain this behavior from the statecharts library? Thanks, Chris

2 1

Building Python.Boost 2 with VC
by Marko Bozikovic 30 Nov '07

30 Nov '07

Hi all, I'm having problems building Boost.Python with VC 2003. I'm reading the howto, but I must be missing something. My Python 2.4 is installed in C:\Python (using official Windows installer) My user-config.jam looks like this: import toolset : using ; using msvc : 7.1 ; using python : 2.4 : C:\\Python ; (I have tried C:\Python and C:/Python, no luck) When I run bjam: tools\bjam.exe --with-python I get the following error: 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 warning: Python location is not configured warning: the Boost.Python library won't be built ...found 1 target... user-config.jam is begin read, because bjam reports errors in it. What am I missing? Thank you, -- Marko ICQ: 5990814 I'm not under the alkafluence of inkahol that some thinkle peep I am. It's just the drunker I sit here the longer I get.

2 3

Serialization: Visual C+ Template Bug ?
by Oliver Kania 30 Nov '07

30 Nov '07

Hello ! When linking a program that consists only of main.cpp with a library that serializes a class "Palo Cllient" I get the following message (sry for the mess): ================================================== error LNK2019: unresolved external symbol "private: void __thiscall jedox::palo::PaloClient::serialize<class boost::archive::text_oarchive>(class boost::archive::text_oarchive &,unsigned int)" (??$serialize@ Vtext_oarchive@archive@boost@@@ PaloClient@palo@jedox@@AAEXAAVtext_oarchive@archive@boost@@I@Z) referenced in function "public: static void __cdecl boost::serialization::access::serialize<class boost::archive::text_oarchive,class jedox::palo::PaloClient>(class boost::archive::text_oarchive &,class jedox::palo::PaloClient &,unsigned int)" (??$serialize@ Vtext_oarchive@archive@boost@@VPaloClient@palo@jedox@@@ access@serialization@boost@@SAXAAVtext_oarchive@archive@2@AAVPaloClient@ palo@jedox@@I@Z) ================================================== This happens even though I do NOT explicitly serialize anything. Main.cpp includes: #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> For the class PaloClient, I do use the Pimpl idiom and serialize as it is recommended in the documentation: PaloClient.cpp: -------------------------------------------------------------- #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/scoped_ptr.hpp> .... template<class Archive> void PaloClient::serialize( Archive &ar, const unsigned int version ) { ar & m_PaloClientImpl; } template void PaloClient::serialize<boost::archive::text_iarchive>( boost::archive::text_iarchive & ar, const unsigned int file_version ); template void PaloClient::serialize<boost::archive::text_oarchive>( boost::archive::text_oarchive & ar, const unsigned int file_version ); ------------------------------------------------------------------------ Now, when I change this to void PaloClient::serialize(boost::archive::text_iarchive & ar, const unsigned int file_version) { ar & m_PaloClientImpl; } void PaloClient::serialize (boost::archive::text_oarchive & ar, const unsigned int file_version) { ar & m_PaloClientImpl; } The linkage error disappears. I guess this is a Visual C++ compiler problem but I wanted to post this in case someone else has similar problems. Kind regards, Oliver PS: Thanks for this great serialization library, it saved me many weeks of programming.

2 2

[statechart] round trip eng. diagramming tool
by Chris Paulse 30 Nov '07

30 Nov '07

I seem to remember seeing an open request for a diagramming tool for Boost statecharts that would be similar in concept to the Rhapsody product. Has there been any further development on this front? Thanks. Chris

2 1

boost::serialization and boost::shared_ptr are not working on tree data structure uses PIMPL idiom
by Youhei Murakami 29 Nov '07

29 Nov '07

Hello everyone. I tried to serialize tree data structure. Tree-structure's "node"-class holds "Impl"-structure and Impl-structure holds child nodes as vector<shared_ptr<node> >. Problems occur when serializing a tree structure that was constructed using above structures. Compile errors not occur, but run-time error occures at serialization of input-stream. If exists someone who knows the reason of it., please teach me that. please god bless me! A problematic souce code has been written below and is attached on this mail. [Emveironment] -Windows XP 64bit -Visual Studio 2005 sp1 -boost-1_34_1 #include <iostream> #include <fstream> #include <cstdlib> #include <vector> #include <boost/shared_ptr.hpp> #include <boost/intrusive_ptr.hpp> #include <boost/serialization/serialization.hpp> #include <boost/serialization/string.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/shared_ptr.hpp> #include <boost/serialization/version.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/tracking.hpp> #include <boost/serialization/is_abstract.hpp> #include <boost/serialization/nvp.hpp> #define BOOST_LIB_NAME boost_serialization #include <boost/config/auto_link.hpp> #include <boost/archive/text_woarchive.hpp> #include <boost/archive/text_wiarchive.hpp> #include <boost/serialization/export.hpp> #include <boost/serialization/split_member.hpp> using namespace std; using namespace boost; using namespace boost::serialization; namespace test { class nodebase { public: typedef shared_ptr<nodebase> NodePointer; typedef vector<NodePointer> Children; typedef Children::iterator ChildIterator; public: nodebase(){} nodebase( const wstring &n ) : name(n) {} virtual ~nodebase(){} wstring getname() { return name; } void setname( const wstring &newname ) { name = newname; } private: wstring name; private: friend class serialization::access; template <class Archive> void serialize( Archive &ar, const unsigned int version ) { ar.register_type<nodebase>(); ar & name; } public: virtual void SetParent( const NodePointer &parent ) = 0; virtual Children GetChildren( void ) = 0; virtual void AddChild( const NodePointer &child ) = 0; virtual void RemoveChild( const NodePointer &child ) = 0; virtual void Traverse( const NodePointer &root ) = 0; }; class node : public nodebase { private: struct Impl { Impl() {} Impl( const Children &v ) : children(v) {} Impl( const Children &v, const NodePointer &p ) : children(v), parent(p) {} public: Children children; NodePointer parent; private: friend class serialization::access; template <class Archive> void serialize( Archive &ar, const unsigned int version ) { ar.register_type<Impl>(); ar & children; //ar & parent; } }; shared_ptr<Impl> pimpl; public: // constructor/destructor node() : pimpl( new Impl ) {} node( const wstring &n ) : nodebase(n), pimpl( new Impl ) {} node( const Children &v ) : pimpl( new Impl( v ) ) {} node( const Children &v, const NodePointer &p ) : pimpl( new Impl( v, p ) ) {} private: // serialization friend class serialization::access; template <class Archive> void serialize( Archive &ar, const unsigned int version ) { base_object<nodebase>(*this); void_cast_register<node, nodebase>(); ar.register_type<node>(); ar & pimpl; } public: // operations virtual void SetParent( const NodePointer &p ) { pimpl->parent = p; } virtual Children GetChildren( void ) { return pimpl->children; } virtual void AddChild( const NodePointer &child ) { this->pimpl->children.push_back( child ); } virtual void RemoveChild( const shared_ptr<nodebase> &child ) { for( ChildIterator i = pimpl->children.begin(); i != pimpl->children.end(); i++ ) { if( (*i).get() == child.get() ) { pimpl->children.erase( i ); break; } } } virtual void Traverse( const shared_ptr<nodebase> &node ) { if( !node ) { return; } #ifdef _DEBUG wcout << node->getname() << endl; #endif Children children = node->GetChildren(); for( ChildIterator i = children.begin(); i != children.end(); i++ ) { Traverse( *i ); } } void print() { for( Children::iterator i = pimpl->children.begin(); i != pimpl->children.end(); i++ ) { wcout << i->get()->getname() << endl; } } }; }; BOOST_CLASS_TRACKING(test::nodebase, boost::serialization::track_always); BOOST_CLASS_TRACKING(test::node, boost::serialization::track_always); int _tmain(int argc, _TCHAR* argv[]) { using namespace test; { node::NodePointer root( new node(wstring(L"root")) ); node::NodePointer c1( new node(wstring(L"c1")) ); node::NodePointer c2( new node(wstring(L"c2")) ); node::NodePointer c3( new node(wstring(L"c3")) ); node::NodePointer c4( new node(wstring(L"c4")) ); node::NodePointer c5( new node(wstring(L"c5")) ); c3->AddChild( c5 ); c1->AddChild( c3 ); c2->AddChild( c4 ); root->AddChild( c1 ); root->AddChild( c2 ); root->Traverse( root ); { // output wofstream ofile( "serialized.txt" ); try { archive::text_woarchive oa( ofile ); oa << (const node&)(*root); } catch( boost::archive::archive_exception &e ) { cout << "At the output : " << e.what() << endl; getchar(); ofile.close(); exit(1); } ofile.close(); } node::NodePointer in; { // input wifstream ifile( "serialized.txt" ); try { archive::text_wiarchive ia( ifile ); ia >> in; } catch( boost::archive::archive_exception &e ) { cout << "At the input : " << e.what() << endl; getchar(); ifile.close(); exit(e.code); } ifile.close(); } } getchar(); return 0; }

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boost::filesystem drive letters?
by Jay Lawrence 29 Nov '07

29 Nov '07

Hi all, After a bit of searching around I am pretty sure I can't get a list of available drive letters with this library, does anyone know of a way to achieve? (platform independant would be ideal) Best, Jay

2 2

mpl::vector to boost::function
by Michael Linck 29 Nov '07

29 Nov '07

This my first attempt at using the boost::mpl library, so I may be off on the wrong track. If that's the case, please let me know and I'll come up with a different way to solve my problem. This seemed like a good practice case though. I'm trying to write a class that can test a function (eventually any function). The idea is that you specialize some number of arguments ( up to ten ) and then hand it a function. Then you feed "test cases" into it, which consist of arguments and an expected result. It seemed to me that TMP might be the key avoid having to write the template class 10 times (once for each number of template parameters). I thought it would look something like this: template<typename TestResultTA, typename TestInput1TA, typename TestInput2TA = void, typename TestInput3TA = void, typename TestInput4TA = void, typename TestInput5TA = void, typename TestInput6TA = void, typename TestInput7TA = void, typename TestInput8TA = void, typename TestInput9TA = void, typename TestInput10TA = void> class TestScenario { typedef boost::mpl::vector<TestInput1TA, TestInput2TA, TestInput3TA, TestInput4TA, TestInput5TA, TestInput6TA, TestInput7TA, TestInput8TA, TestInput9TA, TestInput10TA> TenArgs; typedef typename boost::mpl::find<TenArgs, void>::type FirstUnusedArg; typedef typename TenArgs::erase<TenArgs, FirstUnusedArg, TenArgs::end> JustTheArgs; // I know this is non-sense but what should go here? typedef boost::function2<TestResultTA, JustTheArgs> TestFunctionTS; . . . So far so good. I have a type that is a vector of the subset of template arguments that are initialized. I've thought about maybe trying to use #defines and recursion to create a template argument string for the boost::function, or something. That seems totally hideous, likely to fail, and my coworkers wouldn't accept it as maintainable code anyway just because of the #defines' presence. Is there an elegant way to go from a vector of types to an argument list for another template? I would have to use this mechanism to also specialize various other functions, like the one that accepts sets of arguments, and some kind of struct for holding those arguments at run-time. Thank you, mike

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suspected bug
by Laurence Bunnage 29 Nov '07

29 Nov '07

I am currently maintaining a project written using Borland C++ Builder version 6 build 10.166 and boost version 1.32. I found I had a reoccuring problem in my code whereby the output from lexical_cast<string>(any_double) was not at the precision I was expecting. It started off OK, but after a while it changed. I have tracked it down to some of my code which I simplified to that shown below. The first cast, in the try block, works correctly with the output value d = 5.0 and no assert The second cast, in the catch statement, returns a value of d = 5.00000013628211 and asserts. With the assert removed, all subsequent calls to lexical_cast continue to give similar results. try { double d = boost::lexical_cast<double>(boost::lexical_cast<std::string>(5.0)); assert(d == 5.0); throw std::runtime_error("Not enough points in peak"); } catch (std::exception& e) { double d = boost::lexical_cast<double>(boost::lexical_cast<std::string>(5.0)); assert(d == 5.0); } I have searched the boost website for similar problems and have not found anything (doesn't mean it's not there, just I haven't found it) Any help, especially a solution or work around would be greatly appreciated. NOTE at this time, due to the current state of the project, I would prefer not to have to upgrade to a newer version of the boost library. Laurence Bunnage Software Engineer e-mail: Laurence.Bunnage(a)teraview.com <mailto:Laurence.Bunnage@teraview.com> TeraView Limited Registered in England Registered Office: Platinum Building, St John's Innovation Park, Cambridge CB4 0WS Registered Number: 04126946 VAT Number: 770 8883 84

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boost-users [pointer containers] stl set_unions
by chun ping wang 29 Nov '07

29 Nov '07

is it possible to use stl set_unions with ptr_container or do I have to hand roll my own. if yes what inserter should i use or how would i use two containers having pointer of int ptr_vector<int> a1; ptr_vector<int> a2; have a1 union a2 and store in a3.

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ERROR on serialization for vector<shared_ptr<T> > with PIMPL idiom
by Youhei Murakami 29 Nov '07

29 Nov '07

Hello everyone. I tried to serialize vector<shared_ptr<T> > that is held by pimpl but I met to a lot of error. If someone who knows the resason for it exists, please teach me the reason. source code is below. Compiled using visual studio 2005 sp1 in WindowsXP64bit. boost-1_34_1 source code has been attached. // test_serialization.cpp : Defines the entry point for the console application. // //#include "stdafx.h" #include <iostream> #include <fstream> #include <cstdlib> #include <typeinfo> #include <memory> #include <algorithm> #include <vector> #include <map> #include <boost/any.hpp> #include <boost/shared_ptr.hpp> #include <boost/intrusive_ptr.hpp> #include <boost/ptr_container/ptr_vector.hpp> #include <boost/thread.hpp> #include <boost/tuple/tuple.hpp> #include <boost/tuple/tuple_comparison.hpp> #include <boost/tuple/tuple_io.hpp> #include <boost/type_traits.hpp> #include <boost/optional.hpp> #include <boost/serialization/serialization.hpp> #include <boost/serialization/string.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/list.hpp> #include <boost/serialization/map.hpp> #include <boost/serialization/set.hpp> #include <boost/serialization/deque.hpp> #include <boost/serialization/shared_ptr.hpp> #include <boost/serialization/scoped_ptr.hpp> #include <boost/serialization/split_member.hpp> #include <boost/serialization/version.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/tracking.hpp> #include <boost/serialization/is_abstract.hpp> #include <boost/serialization/nvp.hpp> #define BOOST_LIB_NAME boost_serialization #include <boost/config/auto_link.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/text_woarchive.hpp> #include <boost/archive/text_wiarchive.hpp> using namespace std; using namespace boost; using namespace boost::serialization; namespace test{ class holder { struct Impl { Impl() : x(0.0), y(0.0), message(wstring(L"blank")) { vec.push_back(shared_ptr<int>( new int(1) )); vec.push_back(shared_ptr<int>( new int(2) )); vec.push_back(shared_ptr<int>( new int(3) )); } Impl( double ax, double ay, const wstring &am, const vector<shared_ptr<int> > &av ) : x(ax), y(ay), message(am), vec(av) { } double x, y; wstring message; vector<shared_ptr<int> > vec; private: friend class serialization::access; template <class Archive> void serialize( Archive &ar, const unsigned long version ); }; shared_ptr<Impl> impl; public: holder() : impl( new Impl ) {} holder( double ax, double ay, const wstring &am, const vector<shared_ptr<int> > &av ) : impl( new Impl(ax, ay, am, av) ) {} private: friend class serialization::access; template <class Archive> void serialize( Archive &ar, const unsigned long version ) { ar & impl; } }; template <class Archive> void holder::Impl::serialize(Archive &ar, const unsigned long version ) { ar & x; // ok ar & y; // ok ar & message; // ok ar & vec; // error : if remove this line, this source code will move file. } template void holder::serialize<archive::text_woarchive>( archive::text_woarchive &ar, const unsigned long version ); template void holder::serialize<archive::text_wiarchive>( archive::text_wiarchive &ar, const unsigned long version ); template void holder::Impl::serialize<archive::text_woarchive>( archive::text_woarchive &ar, const unsigned long version ); template void holder::Impl::serialize<archive::text_wiarchive>( archive::text_wiarchive &ar, const unsigned long version ); }; // end namespace test2 int _tmain(int argc, _TCHAR* argv[]) { using namespace test; { wofstream ofile( L"hierarchy.txt" ); archive::text_woarchive oa(ofile); holder h; oa << (const holder&)h; ofile.close(); holder ih; wifstream ifile( L"hierarchy.txt" ); archive::text_wiarchive ia(ifile); ia >> ih; ifile.close(); }; getchar(); return 0; }

1 0

Library & Header file paths on Windows with Boost
by jayc.lawrence＠gmail.com 29 Nov '07

29 Nov '07

Hi, This post is not really 100% boost specific but I am trying to compile using boost libraries and I thought I'd give this newsgroup a shot. I want to know what have others done to avoid the circles I've gone in to get this simple program compiled. I compiled boost to "c:\boost\" and I have my MinGW installed in "c:\devel\MinGW\" however if I attempt to compile using: g++ -v -Ic:\boost\ simplels.cpp -Lc:\boost\lib\ -lboost_filesystem-mgw34-d-1_34_1 It would result in failing to include the header files and I noticed: ignoring nonexistant directory "c:/boost/" Am I going crazy here or does it appear that the compiler cannot access anything beyond its default include paths? So I tested it out... I made a directory in MinGW called "test" and used the following command line: g++ -v -Ic:\devel\MinGW\test\ headertest.cpp And still no header files.. It resulted in: ignoring nonexistant directory "c:/devel/MinGW/test/" I thought i'd add it my windows %path% too but still had exactly the same problem. So I finally resorted to putting the header files in the MinGW/GCC include directory and the library files in the MinGW/GCC library directory.. et voila! it compiled. But this isn't ideal for me, anyone got any tips where I'm going wrong here cause sure it's compiling now but.. I like to keep things relatively tidy on here! Best, Jay

2 2

Boost Asio within dotnet app : "Acces denied"
by Guillaume Baranger 29 Nov '07

29 Nov '07

Hello, I need to create a server in dotnet application. I am using boost 1.33.1, asio 0.3.8 and vc++ 7.1 . The following code raises an "access denied" exception in a dotnet application. I have tested the same simple code in native c++ application, and it works. Do you have any idea how to resolve my problem? Is there a way to use asio in a dotnet application? try { asio::io_service io_service; asio::ip::tcp::acceptor acceptor(io_service); asio::ip::tcp::endpoint endpoint(asio::ip::tcp::v4(), 35454); acceptor.open(endpoint.protocol()); acceptor.set_option(asio::ip::tcp::acceptor::reuse_address(true)); // exception thrown here acceptor.bind(endpoint); // exception thrown here if previous line in comment acceptor.listen(); } catch(std::exception& excep) { MessageBox::Show(excep.what(),S"",MessageBoxButtons::OK,MessageBoxIcon::Erro r); } Regards, Baranger Guillaume

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