October 2007 - Boost-users - lists.preview.boost.org

Boost features targeting Banking Application - Please share your thoughts!!!!!!
by jayaram.x.ganapathy＠jpmorgan.com 23 Oct '07

23 Oct '07

Hi, I am a C++/JAVA developer. Today someone was saying it is time to migrate from legacy C++ systems to JAVA. I love C++ :-( The trend in banking industry or belief in Banking projects is C++ is outdated and JAVA is the solution. One reason I felt is lack of open source enterprise level middlewares for C++. For java we have many EJB servers, Spring framework is there. Will boost be building libraries which will help to build enterprise level application? Some API's like iBatis, hibernate etc. Something similar to JSP and Tomcat equivalent? I think those will attract more developers to C++. Boost community is doing an excellent job. But how much is the industry going to use? Regards, Jayaram ----------------------------------------- This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to UK legal entities.

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boost::serialization Is there any way to get rid of compiler warnings(C4103, ...) on VC++ 2005?
by Oleg Udovenko 23 Oct '07

23 Oct '07

Hi, I'm compiling the examples from the boost::serialization library with VC++ 2005, and getting a lot of warnings, they are quite annoying. How can I get rid of them? Appreciate any suggestions. Thanks, Oleg. 1>------ Rebuild All started: Project: ExampleXmlSave, Configuration: Release x64 ------ 1>Deleting intermediate and output files for project 'ExampleXmlSave', configuration 'Release|x64' 1>Compiling... 1>stdafx.cpp 1>Compiling... 1>ExampleXmlSave.cpp 1>C:\WORK\STL\boost\boost_1_34_1\boost/config/abi_prefix.hpp(19) : warning C4103: 'c:\work\stl\boost\boost_1_34_1\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>C:\WORK\STL\boost\boost_1_34_1\boost/archive/detail/abi_prefix.hpp(11) : warning C4103: 'c:\work\stl\boost\boost_1_34_1\boost\archive\detail\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>C:\WORK\STL\boost\boost_1_34_1\boost/archive/basic_text_oprimitive.hpp (54) : warning C4103: 'c:\work\stl\boost\boost_1_34_1\boost\archive\basic_text_oprimitive.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) ... 1>C:\WORK\STL\boost\boost_1_34_1\boost/serialization/collections_save_im p.hpp(38) : warning C4267: 'initializing' : conversion from 'size_t' to 'unsigned int', possible loss of data 1> C:\WORK\STL\boost\boost_1_34_1\boost/serialization/list.hpp(39) : see reference to function template instantiation 'void boost::serialization::stl::save_collection<Archive,std::list<_Ty>>(Archi ve &,const Container &)' being compiled 1> with 1> [ 1> Archive=boost::archive::xml_oarchive, 1> _Ty=std::pair<bus_schedule::trip_info,bus_route *>, 1> Container=std::list<std::pair<bus_schedule::trip_info,bus_route *>> 1> ] 1> C:\WORK\STL\boost\boost_1_34_1\boost/serialization/split_free.hpp(45) : see reference to function template instantiation 'void boost::serialization::save<Archive,std::pair<_Ty1,_Ty2>,std::allocator<_ Ty>>(Archive &,const std::list<_Ty> &,const unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::xml_oarchive, 1> _Ty1=bus_schedule::trip_info, 1> _Ty2=bus_route *, 1> _Ty=std::pair<bus_schedule::trip_info,bus_route *> 1> ] ... 1>Linking... 1> Creating library C:\WORK\STL\TST\ExampleXmlSave\x64\Release\ExampleXmlSave.lib and object C:\WORK\STL\TST\ExampleXmlSave\x64\Release\ExampleXmlSave.exp 1>Generating code 1>Finished generating code 1>Embedding manifest... 1>Build log was saved at "file://c:\WORK\STL\TST\ExampleXmlSave\ExampleXmlSave\x64\Release\BuildL og.htm" 1>ExampleXmlSave - 0 error(s), 68 warning(s) ========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========

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boost::test run by name
by Tim St. Clair 23 Oct '07

23 Oct '07

When is the tentative plan to support "run-by-name" Also, are there plans to support test suite registration which is not run unless explicitly specified? (e.g. - hardware required to perform the test) Thanks for your help, Tim

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numerics question...
by Graham Reitz 22 Oct '07

22 Oct '07

How do you round (i.e. from a float to int) with boost::numerics? It seems like there should be a fairly straightforward method (been poking around the documentation). Thanks, Graham

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[BGL] Compressed Sparse Row Graph and Subgraph
by Jacques Papper 22 Oct '07

22 Oct '07

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Boost.MPI compilation problems with MPICH2
by Aydın Buluç 22 Oct '07

22 Oct '07

Hi all, I was a happy user of Boost.MPI that was working together with the underlying OpenMPI. However, MPI_THREAD_MULTIPLE support of OpenMPI is quite clumsy and it hangs frequently (OpenMPI developers call this as being "lightly tested"). So, I installed MPICH2 that claims to supports thread-safe MPI. At the same time, I didn't want to remove my working OpenMPI implementation and my old Boost libraries built on top of that. Therefore, I rebuilt Boost (--with-mpi) using the new mpicxx of MPICH (so that it finds the correct MPICH2 directories, etc) on a different location . Everything went ok during compilation and installation. However, I have compilation errors when trying to run any mpi program. For example, with the test suite provided by Boost.MPI itself, I get errors like (this is for all_gather.cpp specifically but I get similar ones with every other test): ------------------------------------- /tmp/ccbyPLBK.o: In function `void boost::mpi::detail::all_gather_impl<int>(boost::mpi::communicator const&, int const*, int, int*, mpl_::bool_<true>)':all_gather_test.cpp:(.gnu.linkonce.t._ZN5boost3mpi6detail15all_gather_implIiEEvRKNS0_12communicatorEPKT_iPS6_N4mpl_5bool_ILb1EEE[void boost::mpi::detail::all_gather_impl<int>(boost::mpi::communicator const&, int const*, int, int*, mpl_::bool_<true>)]+0x1c): undefined reference to `boost::mpi::communicator::operator int() const' /tmp/ccbyPLBK.o: In function `void boost::mpi::detail::broadcast_impl<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >(boost::mpi::communicator const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, int, int, mpl_::bool_<false>)':all_gather_test.cpp:(.gnu.linkonce.t._ZN5boost3mpi6detail14broadcast_implISsEEvRKNS0_12communicatorEPT_iiN4mpl_5bool_ILb0EEE[void boost::mpi::detail::broadcast_impl<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >(boost::mpi::communicator const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, int, int, mpl_::bool_<false>)]+0x27): undefined reference to `boost::mpi::communicator::operator int() const' ------------------------------------- I "quadruple-checked" to see that the versions of mpicxx/libraries/include directories all belong to the new installation of MPICH2 and not remainders of old OpenMPI installation. Thus, I don't think that is a binary incompatibility issue. MPICH2 implementation works OK alone (without boost) and the old Boost+OpenMPI installation libraries also still work. But the new Boost+MPICH2 libraries... ihhh :( Any suggestions and pointers will be appreciated. Thanks, -- Aydin

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Re: [Boost-users] [mpl] at_c type compiler error
by Robbie Morrison 22 Oct '07

22 Oct '07

------------------------------------------------------------ Subject: Boost-users Digest, Vol 1423, Issue 3 Date: Thu, 18 Oct 2007 12:00:06 -0400 Message-ID: <mailman.11.1192723206.19439.boost-users(a)lists.boost.org> ------------------------------------------------------------ Message: 3 Date: Thu, 18 Oct 2007 17:03:25 +0200 From: Vinzenz 'evilissimo' Feenstra <evilissimo(a)web.de> Subject: Re: [Boost-users] [mpl] at_c type compiler error To: boost-users(a)lists.boost.org Message-ID: <471775BD.3010403(a)web.de> ------------------------------------------------------------ Chris Weed schrieb: >>> >>> { >>> >>> return t.get<0>(); >>> >>> } >> >> { >> >> return boost::get<0>(t); >> >> } Hi all -- Just to say I encountered what looks to be the same problem. Here is the note I left myself: // can later access the statistics as follows: // // std::tr1::tuple<int, double, double, double, double, double> stats; // stats = myTs.getStats(); // int count; // count = stats.get<0>(); // member function usage (could be buggy) // count = std::tr1::get<0>(stats); // free function usage Also: #include <tr1/tuple> // n-tuples I relealize this is the TR1 version and not the Boost version. Please let me know if some stripped down example code would be useful. My development environment for the record: boost : 1.34.1 (via ./configure; make all; make install) gcc : 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5) os : Ubuntu 6.10, Linux 2.6.17-12-generic (7.04 is current) hardware : Toshiba Tecra A2 330 laptop (purchased Aug-2004) cheers Robbie --- Robbie Morrison PhD student -- policy-oriented energy system simulation Institute for Energy Engineering (IET) Technical University of Berlin (TU-Berlin), Germany [from IMAP client]

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Adjacency matrix problem
by abhishek.v＠tcs.com 22 Oct '07

22 Oct '07

Hi I m trying to implement adjacency matrix. typedef boost::adjacency_matrix<boost::undirectedS> Graph; Graph(N); Now here can the N be a variable as what i want is create graph by varying the value of N which taken as an input from user. Following is the snippet of my code... int main(int argc, char *argv[]) { int SIZE; cout<<"\n Enter the matrix size (nxn) :-"; cin>>SIZE; Graph g(SIZE); .................... ..................... return 0; } And the runtime error is as follows :- Assertion failed: false, file BoostLib/boost_1_34_1/boost/graph/adjacency_matrix.hpp, line 941 Same code works fine in case of adjacency_list but in case of adjacency_matrix it is giving run time error. What could be the reason for this... Thanks Abhishek Vyas Tata Consultancy Services Mailto: abhishek.v(a)tcs.com Website: http://www.tcs.com ____________________________________________ Experience certainty. IT Services Business Solutions Outsourcing ____________________________________________ =====-----=====-----===== 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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problem integrating lambda and gsl
by Luke Shulenburger 22 Oct '07

22 Oct '07

I am writing some code that involves several uses of the gnu scientific library that I am trying to streamline using boost lambda. I am having some newbie problems with some rather lengthy compiler errors. Here's a fairly minimal set description of my problem. First I have a functor class that does some relatively complicated processing: class functor : public std::unary_function<double,double> { public: double operator()(double x) const { // do some work here return something; } } For use with the gsl, I have created a wrapper to make this linto something that can be handled by the gsl routines: template<class func> double gslfunc(double x, void* p) { func* f = reinterpret_cast<functor*>(p); return (*f)(p); } I now have the following function that allows me to use gsl routines: template<class func> double myRoutine(func& f) { gsl_function F; F.function = &gslfunc<functor>; F.params = reinterpret_cast<void*>(&f); // call some gsl routines with the gsl_function return something; } I can now use gsl routines on the above functor with no difficulty. What I would like to be able to do is use lambda expressions to make slight modifications to the underlying functor, for example take the following code snippet: functor f; myRoutine(bind(f,_1)+1); However, this dies a horrible death upon compilation complaining that there is no available conversion from the type that is generated by bind(f,_1)+1 to void*. I suspect that there is no way to get a pointer to a lambda'd function and that this is causing my problem. Am I correct? I would happy to provide any more details about what I am doing or the gsl bindings if that would be helpful. Thanks for your consideration. Luke Shulenburger (shulenbu(a)uiuc.edu)

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boost::format: get expected number of arguments
by Ruben Lopez 22 Oct '07

22 Oct '07

Hi, I am using boost::format in my project, and I would need to know what is the exact number of arguments expected, because the format is written by the end-user, and the program has no way to know it. I have seen that the format class actually has some attributes with this value, but I couldn't see any public methods to get them. Is there any way of getting the expected number of arguments? Thanks in advance.

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