April 2005 - Boost-users - lists.preview.boost.org

Tokenizer in boost 1.32 adds more requirements on Type template parameter for Tokenizer class
by Sebastien Martel 20 Apr '05

20 Apr '05

Hello, It seems that the optimization introduced in token_functions.hpp consisting of converting += into assign calls introduced a new requirement on Type : template < typename TokenizerFunc = char_delimiters_separator<char>, typename Iterator = std::string::const_iterator, typename Type = std::string > class tokenizer { //... } In my case, Type is a custom string class that doesn't implement assign, but has operator +=. I want to avoid changing the interface of the string class. Is Tokenizer reasonable in requiring Type to implement assign ? Could assign_or_plus_equal (token_functions.hpp) fall back on += if assign cannot be found ? It currently does so if the iterator is an input iterator, how about expanding it to test Type traits(!) for an assign member ? Ideas ? Thanks! -- Best regards, Sebastien mailto:smartel@real.com

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Passing BOOST arrays over CORBA
by Simon Monckton 19 Apr '05

19 Apr '05

Hello all: Do any of you have experience passing BOOST vectors/arrays over CORBA? Short of writing a BOOST idl, is there a way of getting at and passing raw array data? -- --------------------------------------------------------------------- Dr. Simon Monckton Defence Scientist Tactical Vehicle Systems Section DRDC Suffield Defence Research and Development Canada Phone: (403) 544-4724 Email: Simon.Monckton(a)drdc-rddc.gc.ca ---------------------------------------------------------------------

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Re: [Boost-users] Re: How to serialize a vector?
by kauai 19 Apr '05

19 Apr '05

Thank you, actually was a newbie mistake. Forgot to include: #include <boost/serialization/vector.hpp> --- Jeff Flinn <TriumphSprint2000(a)hotmail.com> wrote: > > "kauai" <kauai_diver(a)yahoo.com> wrote in message > news:20050419013506.49781.qmail@web60707.mail.yahoo.com... > > Hi all, > > > > I am having problems serializing a vector. > > > > When I have code like this: > > > > ar & m_attrVec; // in my serialize function > > > > I get this error: > > > > xyz.cpp:213: no match for > > `boost::archive::text_iarchive& << > > std::vector<Attribute*, std::allocator<Attribute*> > >&' > > operator > > > > Am I missing something, > > Have you read > http://www.boost.org/libs/serialization/doc/index.html. > > The error is most likely related to your Attribute > pointer, and not so much > with the vector itself. > > Jeff Flinn > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > __________________________________ Do you Yahoo!? Plan great trips with Yahoo! Travel: Now over 17,000 guides! http://travel.yahoo.com/p-travelguide

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Filesystem woes
by steve ahlgren 19 Apr '05

19 Apr '05

Hello all : I'm having great difficulty with boost::filesystem::path (again) and wondering if anyone else has seen this behavior. I'm using vc7.1 (msvc 2003) testing with both static and dynamic link boost::filesystem libraries. The behavior is as follows : 1. The boost regression tests all pass ( ie, in BOOST_ROOT/status running "bjam --dump-tests" and sorting through the output ). 2. If I use fs::path in my code with an absolute windows path ( ie c:/temp ) it _always_ throws. As an example, when I include the following code from the fs test file path_test.cpp in my own code it fails : fs::path p = fs::path( "c:/", fs::native ); assert( p.relative_path().string() == "" ); assert( p.branch_path().string() == "c:" ); assert( p.leaf() == "/" ); assert( p.root_name() == "c:" ); assert( p.root_directory() == "/" ); assert( p.root_path().string() == "c:/" ); assert( p.has_root_path() ); assert( p.has_root_name() ); assert( p.has_root_directory() ); assert( !p.has_relative_path() ); assert( p.has_leaf() ); assert( p.has_branch_path() ); assert( p.is_complete() ); 3. The exceptions are being chucked by the checker code; if I use boost::filesystem::no_check it doesn't fail. The checker complains that "c:" is invalid but clearly it's not ! 4. Before anyone mentions it, the rtls are consistent across all libraries including boost. Perhaps that's the problem though? Do people use boost successfully with /MD and /MDd? Has anyone else seen similar behavior or have any suggestions about what may be happening? As a long shot is this something to do with wchar_t settings on msvc ( /Zc:wchar_t )?? If it's not too much trouble (and I'm assuming it doesn't break the license ) can someone send me the debug build of boost::fs lib (either static or import/dll)? I'll happily pay you back in good kharma! Many thanks in advance; Steve a.

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How to serialize a vector?
by kauai 19 Apr '05

19 Apr '05

Hi all, I am having problems serializing a vector. When I have code like this: ar & m_attrVec; // in my serialize function I get this error: xyz.cpp:213: no match for `boost::archive::text_iarchive& << std::vector<Attribute*, std::allocator<Attribute*> >&' operator Am I missing something, or do I have to use a different method to serialize vectors? Thanks for any help, Kauai __________________________________ Do you Yahoo!? Plan great trips with Yahoo! Travel: Now over 17,000 guides! http://travel.yahoo.com/p-travelguide

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Placeholder Arguments
by Joe McCay 19 Apr '05

19 Apr '05

How do the placeholders actually get the arguments applied? I have read through parts of the metaprogramming book and the documentation. It's obvious to me how something like _1 (arg<1>) selects its argument. I haven't been able to figure out is how it gets the arguments in the first place considering the Lambda expression is not something like _1(5) in most of the examples I have found. My template skills are weak, and I am attempting to sharpen my them (and metaprogramming skills). Thank you in advance. Sincerely, Joseph L. McCay

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dijkstra-listS bug in MSVC 6.0?
by Vivid Yang 19 Apr '05

19 Apr '05

Hi, I tried to compile dijkstra-example-listS (BGL CVS) in MSVC 6.0. There were several errors. In the code tie(e, inserted) = add_edge(edge_array[j].first, edge_array[j].second, g); The variable int edge_array[j].first and edge_array[j].second cannot be converted to descriptors. To solve this, I have to map int (A, B, C, D, E) to descriptor first: std::pair<int, vertex_descriptor> maps[5]; int c = 0; graph_traits<graph_t>::vertex_iterator i, iend; for (tie(i, iend) = vertices(g); i != iend; ++i, ++c) { maps[c] = std::pair<int, vertex_descriptor>(c, *i); } ------------------------------------------------------------------ The same problem happens in dijkstra_shortest_paths.hpp In the lines : typename graph_traits<VertexListGraph>::vertex_iterator ui, ui_end; put(distance, *ui, inf); put(predecessor, *ui, *ui); put(distance, s, zero); They cannot convert descriptor s and (*ui) from (void *) to int Here is the error description: boost\boost_1_32_0\boost\graph\dijkstra_shortest_paths.hpp(211) : error C2664: 'void __cdecl boost::put(int *,int,const double &)' : cannot convert parameter 2 from 'void *' to 'int' This conversion requires a reinterpret_cast, a C-style cast or function-style cast Regards, Vivid

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Strange compile error with Boost.Serialization
by Klaus Nowikow 19 Apr '05

19 Apr '05

Hello all, when I compile the code below (with MSVC 7.1), I get an error telling me that "'serialize' : is not a member of 'std::vector<_Ty>'". I will post the exact error message below the code. The strange thing about this is that when I change the #define TEST line to #define TEST 1 (or 2 or 3), it compiles ok [1 means that only the iarchive is used, 2 that the oarchive is used, and 3 that a 'B' object is serialized instead of an 'A' object]. Is there anything wrong with the code? Thanks and best regards, Klaus <code> #include <boost/serialization/vector.hpp> #include <boost/serialization/nvp.hpp> #include <boost/archive/binary_oarchive.hpp> #include <boost/archive/binary_iarchive.hpp> #include <sstream> #define TEST 0 // Change this to 1, 2, or 3 struct C { int m_; template <class Archive> void serialize(Archive& ar, size_t i) { ar & BOOST_SERIALIZATION_NVP(this->m_); } }; struct B { std::vector<C> m_; template <class Archive> void serialize(Archive& ar, size_t i) { ar & BOOST_SERIALIZATION_NVP(this->m_); } }; struct A { B m_; template <class Archive> void serialize(Archive& ar, size_t i) { ar & BOOST_SERIALIZATION_NVP(this->m_); } }; void save() { #if TEST != 3 A object; #else B object; #endif std::stringstream str; boost::archive::binary_oarchive ar(str); #if TEST != 1 ar << BOOST_SERIALIZATION_NVP(object); #endif } void load() { #if TEST != 3 A object; #else B object; #endif std::stringstream str; boost::archive::binary_iarchive ar(str); #if TEST != 2 ar >> BOOST_SERIALIZATION_NVP(object); #endif } int main(int, char**) { return 0; } </code> <errormessage> ../../Libraries\Boost\include\boost-1_32\boost\serialization\access.hpp(106) : error C2039: 'serialize' : is not a member of 'std::vector<_Ty>' with [ _Ty=C ] ../../Libraries\Boost\include\boost-1_32\boost\serialization\serialization.hpp(78) : see reference to function template instantiation 'void boost::serialization::access::serialize<Archive,T>(Archive &,T &,const unsigned int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\serialization\serialization.hpp(121) : see reference to function template instantiation 'void boost::serialization::serialize<Archive,T>(Archive &,T &,const unsigned int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(159) : see reference to function template instantiation 'void boost::serialization::serialize_adl<Archive,T>(Archive &,T &,const unsigned int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(109) : while compiling class-template member function 'void boost::archive::detail::iserializer<Archive,T>::load_object_data(boost::archive::detail::basic_iarchive &,void *,const unsigned int) const' with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(328) : see reference to class template instantiation 'boost::archive::detail::iserializer<Archive,T>' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(326) : while compiling class-template member function 'void boost::archive::detail::load_non_pointer_type<Archive,T>::load::invoke(Archive &,T &)' with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(366) : see reference to class template instantiation 'boost::archive::detail::load_non_pointer_type<Archive,T>::load' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(331) : while compiling class-template member function 'void boost::archive::detail::load_non_pointer_type<Archive,T>::invoke(Archive &,T &)' with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(529) : see reference to class template instantiation 'boost::archive::detail::load_non_pointer_type<Archive,T>' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\basic_binary_iarchive.hpp(66) : see reference to function template instantiation 'void boost::archive::load<Archive,T>(Archive &,T &)' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\binary_iarchive.hpp(45) : see reference to function template instantiation 'void boost::archive::basic_binary_iarchive<Archive>::load_override<T>(T &,int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\interface_iarchive.hpp(92) : see reference to function template instantiation 'void boost::archive::binary_iarchive_impl<Archive>::load_override<T>(T &,int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\serialization\nvp.hpp(58) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_iarchive<Archive>::operator &<T>(T &)' being compiled with [ Archive=boost::archive::binary_iarchive, T=std::vector<C> ] ../../Libraries\Boost\include\boost-1_32\boost\serialization\access.hpp(106) : see reference to function template instantiation 'void boost::serialization::nvp<T>::serialize<Archive>(Archive &,const unsigned int) const' being compiled with [ T=std::vector<C>, Archive=boost::archive::binary_iarchive ] ../../Libraries\Boost\include\boost-1_32\boost\serialization\serialization.hpp(78) : see reference to function template instantiation 'void boost::serialization::access::serialize<Archive,T>(Archive &,T &,const unsigned int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\serialization\serialization.hpp(121) : see reference to function template instantiation 'void boost::serialization::serialize<Archive,T>(Archive &,T &,const unsigned int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(320) : see reference to function template instantiation 'void boost::serialization::serialize_adl<Archive,T>(Archive &,T &,const unsigned int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(314) : while compiling class-template member function 'void boost::archive::detail::load_non_pointer_type<Archive,T>::load_only::invoke(Archive &,T &)' with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(366) : see reference to class template instantiation 'boost::archive::detail::load_non_pointer_type<Archive,T>::load_only' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(331) : while compiling class-template member function 'void boost::archive::detail::load_non_pointer_type<Archive,T>::invoke(Archive &,T &)' with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\iserializer.hpp(529) : see reference to class template instantiation 'boost::archive::detail::load_non_pointer_type<Archive,T>' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\basic_binary_iarchive.hpp(66) : see reference to function template instantiation 'void boost::archive::load<Archive,T>(Archive &,T &)' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\binary_iarchive.hpp(45) : see reference to function template instantiation 'void boost::archive::basic_binary_iarchive<Archive>::load_override<T>(T &,int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\interface_iarchive.hpp(105) : see reference to function template instantiation 'void boost::archive::binary_iarchive_impl<Archive>::load_override<T>(T &,int)' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] ../../Libraries\Boost\include\boost-1_32\boost\archive\detail\interface_iarchive.hpp(111) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_iarchive<Archive>::operator >><T>(const T &)' being compiled with [ Archive=boost::archive::binary_iarchive, T=boost::serialization::nvp<std::vector<C>> ] </errormessage>

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RE: [Boost-users] RE: Boost thread problem
by Sliwa, Przemyslaw (London) 19 Apr '05

19 Apr '05

Ben, Thank you for this. Your reply was very useful, I will have a look at it. Thanks again, Pshemek -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Ben Hutchings Sent: 18 April 2005 19:37 To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] RE: Boost thread problem Sliwa, Przemyslaw (London) wrote: > The CFXTrade is a dummy class. > Here is the simple code, > > Pshemek Well, there's nothing wrong with CFXTrade, but at least I know I have a complete program to look at now. read_trades() copies TradeVector without locking the mutex that should protect it. It should be passing boost::ref(TradeVector) to boost::bind instead of TradeVector, or maybe not passing an argument at all. This is probably what's responsible for the crash. Other problems I spotted: - read_from_disk doesn't use its argument; it uses TradeVector directly - generate_file is not exception-safe - if thread creation fails, out will not be closed and other child threads will not be joined - generate_file also copies the vector it passes to threads (but this does not affect correctness and so long as generate_file may exit without joining the child thread it is unsafe to pass a reference) - getTradeFromString has no error-handling Ben. _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------

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Re: simple example with boost/serialization?
by Alex Makarenko 18 Apr '05

18 Apr '05

Thanks Daniel, you were spot on: I did have a compiled copy of boost 1.29 in there. Now to the bad news: demo.cpp compiles but does not link with what looks like a thousand symbols missing (archives and serialization stuff). Seems like i'm missing a library, but which one? and is it supposed to come with the debian package? (I do have all the include files.) I looked but couldn't find a dedicated package for just the serialization library. There're three mentions of "libboost_serialization" in the archive of this mailing list but not a single word in the current documentation (website or local). Is there some chunk of documentation I'm thoroughly missing? Thanks again, alex Date: Sun, 17 Apr 2005 09:47:36 +0100 From: Daniel James <daniel(a)calamity.org.uk> Subject: [Boost-users] Re: simple example with boost/serialization? To: boost-users(a)lists.boost.org Message-ID: <d3t7k2$dbn$1(a)sea.gmane.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Alex Makarenko wrote: > I am trying to use the boost serialization library but can't compile > even the simplest demo. [snip] > In file included from /usr/local/include/boost/config.hpp:35, > from /usr/include/boost/serialization/utility.hpp:21, > from demo.cpp:16: > /usr/local/include/boost/config/compiler/gcc.hpp:57:7: warning: > #warning "Unknown compiler version - please run the configure tests > and report the results" This looks wrong, boost 1.32 should know about gcc-3.3. Also, boost/config.hpp is in /usr/local/include, but boost/serialization/utility.hpp is in /usr/include. My guess is that you've got an old version of boost in /usr/local/include, and the pre-built debian packages in /usr/include There's a bug in the debian packages which causes some files to be lost during an upgrade to the new version, it looks like that has happened here. If I'm right then you should remove the boost packages, remove the old version from /usr/local and reinstall the boost packages (the bug only affects upgrades, not installs). Daniel

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