July 2008 - Boost-users - lists.preview.boost.org

Re: [Boost-users] [serialization] Problems with BOOST_IS_ABSTRACT, gcc 3.2.3 and Boost 1.35.0
by Dan Thomas 23 Jul '08

23 Jul '08

> Try using boost/serialization/assume_abstract.hpp Thanks for the quick reply. I tried this change but it made no difference. I still get the same errors. I have dealt with my immediate problems by rolling back to boost 1.33.0 so I will stop pestering you about this :-) Thanks for your help Dan

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please help : Error: Unexpected type name
by Sun, Xiuxin 23 Jul '08

23 Jul '08

> HI all, > when I try to compile the example code only use boost head-file in > SunOS : > > #include <boost/lambda/lambda.hpp> > #include <iostream> > #include <iterator> > #include <algorithm> > > int main() > { > using namespace boost::lambda; > typedef std::istream_iterator<int> in; > > std::for_each( > in(std::cin), in(), std::cout << (_1 * 3) << " " ); > } > > I get many errors like 'Unexpected type name', the first one is : > > CC -g -I../. -c -o main.o main.C > ".././boost/lambda/detail/function_adaptors.hpp", line 203: Error: > Unexpected type name "boost::lambda::Arg1" encountered. > could someone give a hand. > sun

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[fusion] sequence conversion
by Istvan Buki 23 Jul '08

23 Jul '08

Dear Boost experts, I'm trying to copy data between different types of fusion sequences with limited success. The example below shows what I'm trying to achieve. Any good advice would be welcome. namespace fields { struct i ; struct l ; struct d ; } int main() { using namespace boost::fusion ; typedef map < pair< fields::i, int >, pair< fields::l, long >, pair< fields::d, double > > map_type ; typedef vector< int, long, double > vect_t ; vect_t tup1( 1, 2, 3.0 ) ; map_type m = tup1 ; // OK. Works as expected vect_t tup2 = m ; // Error. Conversion not possible // expected result: tup1 == tup2 } Does fusion provide a way to achieve what I'm trying to do? As a side question, I was wondering whether it is possible to synthetize the vect_t type from map_type (with MPL?) A concrete example where this could be useful is an application that manipulates map_type objects and to persist these objects it uses the SOCI database library that supports fusion vectors. Before inserting a row in the database, the map_type object should be converted to a vect_t object and when retrieving a row from the database a vect_t object should converted to a map_type object. Thanks for your help.

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Choice of boost containers
by Ramesh 23 Jul '08

23 Jul '08

Hi, I am a newbie to C++ & boost, I have questions on choosing the right boost container for my requirement. *A base class :* class Player { protected: std::string PlayerId; // real, winamp, Windows media, vlc, divx long capMask // capability mask public: Player(std::string param_Id, long param_Mask) { Id = param_Id; capMask = param_Mask; } }; *Two derived classes:* *Derived Class I:* class Port_Player:public Player { protected: bool IsTouchScreen; // True if touch screen based public: Port_Player(std::string param_Id, long param_Mask, bool TS) :Player(param_Id, param_Mask) { IsTouchScreen = TS; } } *Dervied Class II:* class Non_Port_Player:public Player { protected: long Browser; // Supported by firefox, IE etc public: Non_Port_Player(std::string param_Id, long param_Mask, long pBrowser) :Player(param_Id, param_Mask) { Browser = pBrowser; } } Questions I have: 1) As I would create objects of either Derived Class I or Derived Class II (which would be known to be only at runtime) and I need to add pointers to these objects in a container, I would like to know which container would suit best?? 2) Also, I should be able to perform lookups based on playerId field in the container,playerId would be an auto generated field for every object created (irrespective of Derived Class I or Derived class II), please advice on which container to choose in boost. BTW I had a look at the multi-index container, in which case I would be replicating data from the objects that I create, I am rather looking to see if I can avoid copying data rather than do lookups based on the object addresses in the container. Thanks in advance for any suggestions / advice on this. Regards Ramesh

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problem compiling ublas vector iterator with templates
by Alain Leblanc 22 Jul '08

22 Jul '08

Hi, I'm trying to compile the following piece of code with gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7) and I keep getting the error message listed below. A colleague of mine told me that he can compile it on MSVC. If I remove the template and set everything as vector<double> then it compiles without any problem. Anyone has an idea of what I may be doing wrong? Thanks, Alain <... bunch of include statements ...> namespace UBLAS = boost::numeric::ublas; //summation of a vector template <class Tv> Tv vectorSum(const UBLAS::vector< Tv >& A) { Tv sum = 0; for (UBLAS::vector< Tv >::const_iterator it = A.begin(); it!=A.end(); ++it) sum += (*it); return sum; } g++ -I. -I./vector testvector.cc In file included from testvector.cc:43: vector/TVector.h: In function 'Tv vectorSum(const boost::numeric::ublas::vector<Tv, boost::numeric::ublas::unbounded_array<T, std::allocator<_CharT> > >&)': vector/TVector.h:509: error: expected `;' before 'it' vector/TVector.h:509: error: 'it' was not declared in this scope

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1.35.0 && serialization && spirit && thread safety
by Tim St. Clair 22 Jul '08

22 Jul '08

I've seen info in various email-threads regarding thread safety when using xml archives. We had come across some assert conditions in multithreaded code, only to trace down that (BOOST_SPIRIT_THREADSAFE) was not defined during boost compilation. to fix, I modified the Jamfile.v2 for serialization: lib boost_serialization : $(SOURCES).cpp /boost/thread//boost_thread # needed to add this as a dep b/c we need to link threads when we define BOOST_SPIRIT_THREADSAFE : <define>BOOST_SPIRIT_THREADSAFE # needed to add this as a define <toolset>msvc:<cxxflags>/Gy <link>shared:<define>BOOST_SERIALIZATION_DYN_LINK=1 <conditional>@include-spirit ; I've also added BOOST_SPIRIT_THREADSAFE as a <define> in our code as well. I hope this helps others... Cheers, Tim

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[serialization 1_36_0] : Binary Archive portability between 32 and 64 bits platforms...
by Mathieu Peyréga 22 Jul '08

22 Jul '08

Hello, I'm wondering if a binary archive generated on a 32 bits platform would be readable on a 64 bits one... My guess is no... because i am facing an issue i strongly suspect to come from there... Any clues ? I got a basic_string::resize exception evene before trying to call the serialize method... just doing : std::ifstream fichier(filename.c_str(),std::ios::binary); boost::archive::binary_iarchive archive(fichier); the second line causes the exception... Regards, Mathieu -- http://www.incub.net/

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[Serialization][STLport] Linking Error
by Kevin Tang 22 Jul '08

22 Jul '08

Dear All, I am using Boost library version 1.34.1 in VC7.1 sp1. I don't know why I always fail with linking Boost Serialization and STLport library. But I can successfully build with Boost Serialization with VC7.1 build-in STL library. Do I need to modify my STLport library for Boost? I try STLport v5.1.5, v5.0.3, and v4.6.2. both of these version of STLport also fail in Linking process. Thank you. Kevin Tang. Linking... Creating library *Debug/iSentenceRecognizer.lib* and object *Debug/iSentenceRecognizer.exp* *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::text_oarchive_impl*<class boost::archive::text_oarchive>::text_oarchive_impl<class boost::archive::text_oarchive>(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::text_iarchive_impl*<class boost::archive::text_iarchive>::text_iarchive_impl<class boost::archive::text_iarchive>//(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::basic_text_oprimitive*<class _STL::basic_ostream<char,class _STL::char_traits<char> > >::~basic_text_oprimitive<class _STL::basic_ostream<char,class _STL::char_traits<char> > >(void)" //(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::basic_text_iprimitive*<class _STL::basic_istream<char,class _STL::char_traits<char> > >::~basic_text_iprimitive<class _STL::basic_istream<char,class _STL::char_traits<char> > >(void)" //(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: void __thiscall *boost::archive::text_oarchive_impl*<class boost::archive::text_oarchive>::save(class _STL::basic_string<char,class _STL::char_traits<char>,class _STL::allocator<char> > const &)"/ /(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: void __thiscall *boost::archive::text_iarchive_impl*<class boost::archive::text_iarchive>::load(class _STL::basic_string<char,class _STL::char_traits<char>,class _STL::allocator<char> > &)"/ /(...)/ Y:\2008\iSentenceRecognition\iSentenceRecognition/Debug/iSentenceRecognizer.dll : *fatal error LNK1120: 6 unresolved externals*

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Automate call with n template parameters
by Kevin Jenkins 22 Jul '08

22 Jul '08

Is there any way to automate this, to support from 0 to n parameters? template <class P1, class P2, class P3, class P4, class P5> bool DoIt(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5) { DoThat<P1>(p1); DoThat<P2>(p2); DoThat<P3>(p3); DoThat<P4>(p4); DoThat<P5>(p5); }

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[test] Fatal link error LNK1561: entry point must be defined when using boost.test
by Tjernstrom, Staffan 22 Jul '08

22 Jul '08

(Resend with modified subject to better match list standards) Folks, Hopefully this is me having finger trouble, but I can't seem to get around the problem. Boost 1.35 installed using the binary installer, all the vc8 flavours installed. What happens is that I try to compile / link any of the unit test examples in Visual Studio 2005 Pro, for example the code at http://www.boost.org/doc/libs/test/example/unit_test_example_05.cpp I keep getting the LNK1561: entry point must be defined error. I know that it's looking for, and picking up, the libboost_unit_test_framework-vc80-mt-1_35.lib as if I remove the /LIBPATH from the link command options it compains that it cannot find that library. I have my project settings set as follows: Compiler: /O2 /GL /I "C:\Program Files (x86)\boost\boost_1_35_0" /D "_MBCS" /FD /EHa /MD /Fo"Release\\" /Fd"Release\vc80.pdb" /W3 /nologo /c /Wp64 /Zi /TP /errorReport:prompt Linker: /OUT:"D:\staffan\Documents\Visual Studio 2005\Projects\CeT3x\test\AllUnitTests\Release\test_XOLibrary.exe" /NOLOGO /LIBPATH:"C:\Program Files (x86)\boost\boost_1_35_0\lib" /MANIFEST /MANIFESTFILE:"Release\test_XOLibrary.exe.intermediate.manifest" /DEBUG /PDB:"d:\staffan\Documents\Visual Studio 2005\Projects\CeT3x\test\AllUnitTests\release\test_XOLibrary.pdb" /OPT:REF /OPT:ICF /LTCG /MACHINE:X86 /ERRORREPORT:PROMPT kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib Any thoughts anyone? Rgds Staffan Tj. Staffan Tjernström | Sr. Software Engineer - Market Data Systems | www.esignal.com <http://www.esignal.com/> eSignal, Interactive Data Desktop Solutions (NYSE: IDC) 3955 Point Eden Way | Hayward, CA 94545-3720 | 510.723.1723 | FAX: 510.266.6100 DISCLAIMER: This message (including any files transmitted with it) may contain confidential and / or proprietary information, is the property of Interactive Data Corporation and / or its subsidiaries and is directed only to the addressee(s). If you are not the designated recipient or have reason to believe you received this message in error, please delete this message from your system and notify the sender immediately. An unintended recipient's disclosure, copying, distribution or use of this message, or any attachments, is prohibited and may be unlawful.

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