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[fusion] construct a tuple's elements with arguments
by Yuval Ronen 17 Jan '07

17 Jan '07

If I have a typedef fusion::tuple<X, Y, Z> T; can I somehow create a T instance like T t(1, "hello"); and by that I mean that each of T's elements (of types X, Y and Z) would be constructed using the constructor that accepts an int and a string, assuming there is such a constructor for all T's elements. If there isn't such constructor for all T's elements, then it shouldn't compile, of course. Of course using the exact syntax above is not possible, because it's reserved for something else, but any other syntax would be just as good (perhaps using in_place_factory). Yuval

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BGL edge properties
by marina mentelmacher 17 Jan '07

17 Jan '07

Hi, I didn’t find a way to define BGL adjacency_list without property pointer on edges. I suppose it’s a bug. It’s edge_descriptor is defined as follows: typedef detail::edge_desc_impl<directed_category, vertex_descriptor> edge_descriptor; and template <typename Directed, typename Vertex> class edge_desc_impl : public edge_base<Directed,Vertex> { typedef edge_desc_impl self; typedef edge_base<Directed,Vertex> Base; public: typedef void property_type; inline edge_desc_impl() : m_eproperty(0) {} inline edge_desc_impl(Vertex s, Vertex d, const property_type* eplug) : Base(s,d), m_eproperty(const_cast<property_type*>(eplug)) { } property_type* get_property() { return m_eproperty; } const property_type* get_property() const { return m_eproperty; } // protected: property_type* m_eproperty; }; I think that edge_descriptor should be derived directly from edge_base. Regards, Roman.

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[boost.serialization] compiler warnings
by jsanga＠cox.net 17 Jan '07

17 Jan '07

I have been experimenting with the boost serialization library. It seems to do what I need. I am using Boost_1_33_1 and Microsoft’s VC8 compiler. When I create a simple little program, I’m getting a lot of compiler warnings even at the /w3 level. Could compiler switches or installation configuration be the problem? #include "stdafx.h" #include <iostream> #include <vector> #include <string> #include <sstream> #include <boost/archive/text_woarchive.hpp> #include <boost/serialization/vector.hpp> typedef std::vector<std::wstring> VCT_WSTR; struct Foo { VCT_WSTR vws; private: // Take care of serializing the class friend class boost::serialization::access; template< class Archive > void serialize( Archive &ar, unsigned int ver ); }; BOOST_CLASS_VERSION ( Foo, 1 ) template< class Archive > void Foo::serialize( Archive &ar, unsigned int /* ver */ ) { ar & vws; } // text archive void Test1( const Foo &foo ) { unsigned int flags = boost::archive::no_header | boost::archive::no_codecvt | boost::archive::no_xml_tag_checking; std::wstringstream wos; boost::archive::text_woarchive oa(wos,flags); oa & foo; std::wcout << L"Foo is " << wos.str() << L"\n"; wos.str(L""); // reset the output stream oa & foo; std::wcout << L"Foo is " << wos.str() << L"\n"; } int _tmain(int argc, _TCHAR* argv[]) { argc; argv; // Set up some recognizable values Foo foo; for( size_t i=0; i < 5; ++i ) foo.vws.push_back( L"Big String for vws" ); Test1( foo ); return 0; } Compiler options are: /O2 /I "D:\Boost_1_33_1" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_SCL_SECURE_NO_DEPRECATE" /D "_UNICODE" /D "UNICODE" /FD /EHsc /MD /Yu"stdafx.h" /Fp"Release\Test.pch" /Fo"Release\\" /Fd"Release\vc80.pdb" /W4 /nologo /c /Wp64 /Zi /TP /errorReport:prompt Sample of Warnings (at /w4) ------ Build started: Project: Test, Configuration: Release Win32 ------ Compiling... Test.cpp D:\Boost_1_33_1\boost/io/ios_state.hpp(52) : warning C4512: 'boost::io::ios_flags_saver' : assignment operator could not be generated D:\Boost_1_33_1\boost/io/ios_state.hpp(32) : see declaration of 'boost::io::ios_flags_saver' D:\Boost_1_33_1\boost/io/ios_state.hpp(75) : warning C4512: 'boost::io::ios_precision_saver' : assignment operator could not be generated D:\Boost_1_33_1\boost/io/ios_state.hpp(55) : see declaration of 'boost::io::ios_precision_saver' D:\Boost_1_33_1\boost/io/ios_state.hpp(98) : warning C4512: 'boost::io::ios_width_saver' : assignment operator could not be generated D:\Boost_1_33_1\boost/io/ios_state.hpp(78) : see declaration of 'boost::io::ios_width_saver' D:\Boost_1_33_1\boost/io/ios_state.hpp(275) : warning C4512: 'boost::io::ios_iword_saver' : assignment operator could not be generated D:\Boost_1_33_1\boost/io/ios_state.hpp(253) : see declaration of 'boost::io::ios_iword_saver' D:\Boost_1_33_1\boost/io/ios_state.hpp(300) : warning C4512: 'boost::io::ios_pword_saver' : assignment operator could not be generated D:\Boost_1_33_1\boost/io/ios_state.hpp(278) : see declaration of 'boost::io::ios_pword_saver' D:\Boost_1_33_1\boost/io/ios_state.hpp(330) : warning C4512: 'boost::io::ios_base_all_saver' : assignment operator could not be generated D:\Boost_1_33_1\boost/io/ios_state.hpp(306) : see declaration of 'boost::io::ios_base_all_saver' D:\Boost_1_33_1\boost/io/ios_state.hpp(406) : warning C4512: 'boost::io::ios_all_word_saver' : assignment operator could not be generated D:\Boost_1_33_1\boost/io/ios_state.hpp(382) : see declaration of 'boost::io::ios_all_word_saver' D:\Boost_1_33_1\boost/serialization/void_cast.hpp(127) : warning C4512: 'boost::serialization::void_cast_detail::void_caster' : assignment operator could not be generated D:\Boost_1_33_1\boost/serialization/void_cast.hpp(91) : see declaration of 'boost::serialization::void_cast_detail::void_caster' D:\Boost_1_33_1\boost/io/ios_state.hpp(246) : warning C4512: 'boost::io::basic_ios_locale_saver<Ch>' : assignment operator could not be generated with [ Ch=wchar_t ] D:\Boost_1_33_1\boost/archive/basic_text_oprimitive.hpp(75) : see reference to class template instantiation 'boost::io::basic_ios_locale_saver<Ch>' being compiled with [ Ch=wchar_t ] D:\Boost_1_33_1\boost/archive/text_woarchive.hpp(45) : see reference to class template instantiation 'boost::archive::basic_text_oprimitive<OStream>' being compiled with [ OStream=std::wostream ] D:\Boost_1_33_1\boost/archive/text_woarchive.hpp(99) : see reference to class template instantiation 'boost::archive::text_woarchive_impl<Archive>' being compiled D:\Boost_1_33_1\boost/archive/detail/oserializer.hpp(118) : warning C4100: 'flags' : unreferenced formal parameter D:\Boost_1_33_1\boost/archive/detail/oserializer.hpp(118) : while compiling class template member function 'bool boost::archive::detail::oserializer<Archive,T>::tracking(const unsigned int) const' with [ Archive=boost::archive::text_woarchive, T=Foo ] D:\Boost_1_33_1\boost/archive/detail/oserializer.hpp(264) : see reference to class template instantiation 'boost::archive::detail::oserializer<Archive,T>' being compiled with [ Archive=boost::archive::text_woarchive, T=Foo ] D:\Boost_1_33_1\boost/archive/detail/oserializer.hpp(263) : while compiling class template member function 'void boost::archive::detail::save_non_pointer_type<Archive,T>::save_standard::invoke(Archive &,const Foo &)' with [ Archive=boost::archive::text_woarchive, T=Foo ] D:\Boost_1_33_1\boost/archive/detail/oserializer.hpp(322) : see reference to class template instantiation 'boost::archive::detail::save_non_pointer_type<Archive,T>::save_standard' being compiled with [ Archive=boost::archive::text_woarchive, T=Foo ] D:\Boost_1_33_1\boost/archive/detail/oserializer.hpp(310) : while compiling class template member function 'void boost::archive::detail::save_non_pointer_type<Archive,T>::invoke(Archive &,const Foo &)' with [ Archive=boost::archive::text_woarchive, T=Foo ] D:\Boost_1_33_1\boost/archive/detail/oserializer.hpp(536) : see reference to class template instantiation 'boost::archive::detail::save_non_pointer_type<Archive,T>' being compiled with [ Archive=boost::archive::text_woarchive, T=Foo ] D:\Boost_1_33_1\boost/archive/basic_text_oarchive.hpp(78) : see reference to function template instantiation 'void boost::archive::save<Archive,const T>(Archive &,const T &)' being compiled with [ Archive=boost::archive::text_woarchive, T=const Foo ] D:\Boost_1_33_1\boost/archive/detail/interface_oarchive.hpp(78) : see reference to function template instantiation 'void boost::archive::basic_text_oarchive<Archive>::save_override<T>(T &,int)' being compiled with [ Archive=boost::archive::text_woarchive, T=const Foo ] D:\Boost_1_33_1\boost/archive/detail/interface_oarchive.hpp(86) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_oarchive<Archive>::operator <<<T>(T &)' being compiled with [ Archive=boost::archive::text_woarchive, T=const Foo ] .\Test.cpp(60) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_oarchive<Archive>::operator &<const Foo>(T &)' being compiled with [ Archive=boost::archive::text_woarchive, T=const Foo ]

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Re: [Boost-users] Visual C++ 2005 help installing Boost
by Harry Georgakopoulos 17 Jan '07

17 Jan '07

I am having exactly the same problem as a previous user. Could you please show me how you fixed your boost build? I'm getting the following errors ...failed updating 120 targets ...skipped 80 targets... ...updated 847 targets... I don't know how to open the vsvars32.bat file in order to change the paths that Mr Kozicki suggested. Any help would be greatly appreciated. I have installed the latest SDK. Also, how do i get rid of the warnings? I know i need to define _SCL_SECURE_NO_DEPRECATE globally, but how do i do that exactly? Finally, how do i know i have a correct build install? How do i test it? Thank you Please send your response to hgeorgako(a)hotmail.com harry g.

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program_options' exception "Only one tab per paragraph is allowed"
by Peng Yu 16 Jan '07

16 Jan '07

Hi, I got the following exception thrown, when I have multiple tabs (boost 1.33.1). The code worked fine with boost 1.32.0. I'm wondering if there any specific reason to throw this exception in the newer version. If I need multiple tabs, are there any work around? Thanks, Peng terminate called after throwing an instance of 'boost::program_options::error' what(): Only one tab per paragraph is allowed Aborted

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including export.hpp
by Miguel Silvestre 16 Jan '07

16 Jan '07

Ok! Instantiation On the Documentation it says: "...the header file export.hpp has to come after all the archive header files... in the Instatiation. And in the code of the file basic_archive.hpp it says: #error "export.hpp must not be included before any archive header" :S -- Miguel Silvestre

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[boost.python][newbie], i can't compile with it
by Voph Devel 16 Jan '07

16 Jan '07

hello I'm entirely new to boost and also to python... For my first step I'm still having troubles for compiling my c++ code. just including <boost/python.hpp> leads my gcc to output these errors. g++ -O0 -g3 -Wall -c -fmessage-length=0 -oEnvPython.o ../EnvPython.cpp In file included from /usr/include/boost/python/detail/prefix.hpp:13, from /usr/include/boost/python/args.hpp:8, from /usr/include/boost/python.hpp:11, from ../EnvPython.h:4, from ../EnvPython.cpp:1: /usr/include/boost/python/detail/wrap_python.hpp:50:23: error: pyconfig.h: No such file or directory /usr/include/boost/python/detail/wrap_python.hpp:74:24: error: patchlevel.h: No such file or directory /usr/include/boost/python/detail/wrap_python.hpp:77:2: error: #error Python 2.2 or higher is required for this version of Boost.Python. /usr/include/boost/python/detail/wrap_python.hpp:141:21: error: Python.h: No such file or directory ( and then a thousand lines of errors...) I didn't manually build boost and boost.python. I'm running Debian, and I have the corresponding .so files for boost and python in my usr/lib. I have python 2.3 2.4 and 2.5 installed. pyconfig.h seems to be auto-generated. but i haven't a single clue for launching this ? do you know about my problem ?

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Re: [Boost-users] BoostCon 2007 Program Committee progress report
by Andrew Marlow 15 Jan '07

15 Jan '07

boost-users-bounces(a)lists.boost.org wrote: > It would probably make a lot more sense to combine it with > the annual ACCU conference in Oxford. Sounds interesting. I wonder how that would work? I usually attend the ACCU conferences and find myself torn between great talks that are happening at the same time. If boost talks were also going on at the time I might go crazy! > > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Andrew Marlow <snip> This sounds like the bees knees. > Unfortunately I will not be able to persaude my current > employer to send me and my colleagues to Colorado for that > week. What plans does Boost have for a UK conference please? ******************************************************************************" The data and information (collectively called Information) herein is the sole property of ICAP. The Information is confidential, may be legally privileged and is intended solely for the use of the individual or entity to whom it is addressed. Unauthorised disclosure, copying or distribution of the Information is strictly prohibited and the recipient of the Information shall not redistribute the Information in any form to a third party. If you received this Information in error please tell us by reply (or telephone the sender) and delete all copies on your system. References in this Information to ICAP are references to ICAP plc, a company incorporated in England with registered number 3611426 whose registered office is 2 Broadgate, London, EC2M 7UR and where the context requires, includes its subsidiary and associated undertakings. As applicable, certain companies within the ICAP group are authorised and regulated by the Financial Services Authority. Any investment research sent from ICAP will provide an impartial and objective assessment of the securities, companies or other matters that are the subject of their research and our Conflicts of Interest Management Policy regarding investment research can be viewed by requesting a copy from your usual contact at ICAP. Please visit www.icap.com for further regulatory information including details regarding the European eCommerce Directive. *******************************************************************************" We have taken precautions to minimise the risk of transmitting software viruses, but we advise you to carry out your own virus checks on any attachment to this message. We cannot accept liability for any loss or damage caused by software viruses. " *******************************************************************************

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Re: [Boost-users] BoostCon 2007 Program Committee progress report
by Schalk_Cronje＠McAfee.com 15 Jan '07

15 Jan '07

It would probably make a lot more sense to combine it with the annual ACCU conference in Oxford. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Andrew Marlow <snip> This sounds like the bees knees. Unfortunately I will not be able to persaude my current employer to send me and my colleagues to Colorado for that week. What plans does Boost have for a UK conference please? I am trying to get my employer to consider using boost for some platform independence. </snip>

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Re: [Boost-users] Deriving Serialization classes
by Miguel Silvestre 15 Jan '07

15 Jan '07

???? a) But I'm deriving it from text_archive_imp b) what? I didn't understand.. As I said the binary serialization is working fine c) Onde again what do you mean?? How can I derivate the serialization classes?? I've tried the following code to, but with the same error: class TextArchiveO : public IArchive, // don't derive from text_oarchive !!! public boost::archive::text_oarchive_impl<TextArchiveO> { public: TextArchiveO(std::ostream & os, unsigned flags = 0) : boost::archive::text_oarchive_impl<TextArchiveO>(os, flags) {} ~TextArchiveO(){} virtual void Serialize(int& t) { *this & BOOST_SERIALIZATION_NVP(t); } virtual void Serialize(bool& t) { *this & BOOST_SERIALIZATION_NVP(t); } }; class TextArchiveI : public IArchive, // don't derive from text_oarchive !!! public boost::archive::text_iarchive_impl<TextArchiveI> { public: TextArchiveI(std::istream & is, unsigned flags = 0) : boost::archive::text_iarchive_impl<TextArchiveI>(is,flags) {} ~TextArchiveI(){} virtual void Serialize(int& t) { *this & BOOST_SERIALIZATION_NVP(t); } virtual void Serialize(bool& t) { *this & BOOST_SERIALIZATION_NVP(t); } }; On 1/10/07, Robert Ramey <ramey(a)rrsd.com> wrote: > > > > a) try deriving from text_?archive_impl rather than IArray > b) If you're going to put your own archive in a separate file - make sure you find > a way to explicitly instantiat it. See text_oarchive.cpp in the library. > c) I wouldn't recommend using the HEAD branch for "real" code since > this is altered from time to time. > > Robert Ramey > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > -- Miguel Silvestre -- Miguel Silvestre

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