- Boost-users - lists.boost.org

Re: [Boost-users] [tuple] generating tuples from type lists
by imre＠u-tx.com 16 Aug '06

16 Aug '06

From: Joel de Guzman <joel(a)boost-consulting.com> > > Maybe boost::fusion can help. > > Sure: > > typename boost::fusion::result_of::as_vector<your_type_list>::type I am new to boost, so could you elaborate this a bit? I can't seem to find anything called result_of in the boost::fusion namespace. If this name is hidden by some macro magic, could you give the header file I have to #include? Else could you explain what am I missing? I was able to do something like this: #include <boost/mpl/vector.hpp> #include <boost/spirit/fusion/sequence/generate.hpp> #include <boost/spirit/fusion/sequence/make_tuple.hpp> #include <boost/utility/result_of.hpp> using namespace boost::mpl; using namespace boost::fusion; using namespace boost; typedef vector<int, char, double>::type typelist; typedef meta::generate<typelist>::type my_tuple; int main() { my_tuple t; t = make_tuple(1, 'a', 0.25); } But I have the feeling this might not be the intended way of usage ... Regards ImRe

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Re: [Boost-users] [general] MSVC71 Warnings Off?
by Wu Yinghui, Freddie 16 Aug '06

16 Aug '06

> On 8/14/06, Wu Yinghui, Freddie <yhwu(a)volumeinteractions.com> wrote: >> Hi all, >> >> I guess this question could have been asked before. But I've failed to >> find an answer from my basic search from the web so far. So please try >> to bear with me if it is old stuff. >> >> Our development environment is using MSVC71 at the moment, and our >> coding standard requires warning level 4 and 64-bit compatiblity check >> of the compiler. But whenever I use some of the Boost library headers >> (most notably Boost.Function, Boost.Integer and Boost.uBLAS for now, and >> we have not started using most of the other libraries yet), there are >> tons of warnings from the compiler. >> >> As our development team view compiler warnings as important signs of >> potential problems in our own code, we'd like to suppress warnings from >> Boost headers (assuming that they are at least better tested than our >> code). >> >> So my question is: Is there a way for us to suppress warnings from Boost >> headers without affecting the warning level significantly on our own >> code? > > This will make vc++ treat a header with warning level 3: > > #pragma warning(push, 3) > > #include <some/boost/header.hpp> > > #pragma warning(pop) > Thanks for your quick reply. I knew this trick. But what I want is probably some more elegant ways of doing this. (It seems quite a bit of a trouble since those pragmas will generate lots of warnings when I build using gcc. And if I have to surround each of those pragma with platform detection macros, it will end up quite a few lines for each of my hundred header/source files.) Any easier-to-adopt ideas? :) Cheer, Freddie -- Wu Yinghui, Freddie Research & Development Software Engineer Volume Interactions Pte Ltd 1 Kim Seng Promenade, #12-01 Great World City East Tower Singapore 237994 Tel: +65 62226962 (Ext 216) Fax: +65 62226215 Email: yhwu(a)volumeinteractions.com URL: http://www.volumeinteractions.com Important: This message is intended for the recipient(s) addressed above. It contains privileged and confidential information. If you are not the intended recipient, please notify the sender immediately by replying to this message and then delete it from your system. You must not read, copy, use, or disseminate this communication in any form. Thank you.

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Problem building for VC-8
by Bob Cowdery 16 Aug '06

16 Aug '06

Hi I am trying to build the boost libraries on XP with the VC-8 compiler from the Express edition. I have downloaded boost-1-33-1 and bjam boost-jam-3.1.13-1-ntx86. I tried to follow the instructions at http://www.boost.org/tools/build/v1/vc-8_0-tools.html. It's not clear to me if the msvc tools and the vc8 extension have to be installed or are part of bjam. I can't find a download for the tools though. Ignoring that, I simply ran up the hopefully correct environment by running "C:\Program Files\Microsoft Platform SDK for Windows Server 2003 R2\Setup\SetEnvLaunchWinXP32Retail.Cmd" /XP32 /RETAIL and then vcvars32.bat. I also set VC80_ROOT to my VC8 directory. Whatever I try I get the same result as below. It's trying to invoke VC7 which I don't have. Any help appreciated. Bob --------------- CALL "C:\Program Files\Microsoft Visual Studio .NET 2003\VC7\bin\VCVARS32.BA T" >nul "C:\Program Files\Microsoft Visual Studio .NET 2003\VC7\bin\cl" /Zm800 -nolo go /EHsc -c /Z7 /Od /Ob0 /EHsc /GR /MTd /Op /wd4675 /Zc:forScope /Zc:wchar_t - I"bin\boost\libs\program_options\build" -I"C:\Downloads\Boost\boost_1_33_1" -I" C:\Downloads\Boost\boost_1_33_1" -Fo"bin\boost\libs\program_options\build\libbo ost_program_options.lib\vc-7_1\debug\runtime-link-static\threading-multi\cmdline .obj" -Tp"C:\Downloads\Boost\boost_1_33_1\libs\program_options\build\../src/cmdl ine.cpp" ...failed vc-C++ bin\boost\libs\program_options\build\libboost_program_options.l ib\vc-7_1\debug\runtime-link-static\threading-multi\cmdline.obj... vc-C++ bin\boost\libs\program_options\build\libboost_program_options.lib\vc-7_1\ debug\runtime-link-static\threading-multi\config_file.obj ...interrupted The system cannot find the path specified. The system cannot find the path specified.

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[format] When compiling with vc8 I get a warning
by Eoin 15 Aug '06

15 Aug '06

Hello, when compiling one of my projects which uses Boost.Format I get the compiler warning shown below. I have defined both _CRT_SECURE_NO_DEPRECATE & _CRT_NONSTDC_NO_DEPRECATE as suggested by various web pages. With these the vast majority of warnings go away but this pesky one attached here is still there. Would people know if there is anything else I can do to get rid of this warning? Thanks very much, kind regards Eoin. Error given by vc 8.0 C:\Develop\Libraries\Boost\boost_cvs\boost/format/alt_sstream_impl.hpp(252) : warning C4996: 'std::char_traits<char>::copy' was declared deprecated C:\Program Files\Microsoft Visual Studio 8\VC\INCLUDE\iosfwd(446) : see declaration of 'std::char_traits<char>::copy' Message: 'You have used a std:: construct that is not safe. See documentation on how to use the Safe Standard C++ Library' C:\Develop\Libraries\Boost\boost_cvs\boost/format/alt_sstream_impl.hpp(223) : while compiling class template member function 'int boost::io::basic_altstringbuf<Ch,Tr,Alloc>::overflow(int)' with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] C:\Develop\Libraries\Boost\boost_cvs\boost/format/format_class.hpp(136) : see reference to class template instantiation 'boost::io::basic_altstringbuf<Ch,Tr,Alloc>' being compiled with [ Ch=char, Tr=std::char_traits<char>, Alloc=std::allocator<char> ] C:\Develop\Apps\Http\Http\src\server_connection.cpp(61) : see reference to class template instantiation 'boost::basic_format<Ch>' being compiled with [ Ch=char ]

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[Serialization] Help needed with unhandled exception
by David Guardado 15 Aug '06

15 Aug '06

Hello, I would really appreciate some help with this error: "Unhandled exception at 0x7c812a5b in Alchera.exe: Microsoft C++ exception: boost::archive::archive_exception @ 0x0012e5c0." I am making a Visual C++ 7.1 / MFC program using Boost for serialization. The relevant code is as follows: // Ecosystem.h #include <fstream> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> class Ecosystem { private: ... friend class boost::serialization::access; ... public: ... template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & this->intMember; } ... }; // CDocumentDerived.h #include "Ecosystem.h" class CDocumentDerived { Ecosystem* ecosystem; ... }; // CDocumentDerived.cpp #include <fstream> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> ... CDocumentDerived::Foo() { std::ofstream ofs("savedmodel.mdl") boost::archive::text_oarchive oa(ofs); oa & *(this->ecosystem); // ******************* exception arises here } The exception arises during de execution of the instruction marked with "***************/" in the code. Has anybody any idea? Thanking you in advance, David

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Looking for arithmetic metafunctions for ratios.
by Eric Lemings 15 Aug '06

15 Aug '06

Hi, I'm looking for a metafunction like this: template < class N1, class D1, class N2, class D2 > struct times { typedef ... numer; typedef ... denom; }; N1, D1, N2, and D2 are all MPL integral constant wrappers. The numer member of the times metafunction is the numerator N of the ratio (preferably in reduced form) produced by (N1/D1) * (N2/D2) = (N/D). Likewise, the denom member is the denominator D of the ratio produced from this equation. Any help greatly appreciated. Thanks, Eric.

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numeric problem on msvc8 x64
by Artem Alimarine 15 Aug '06

15 Aug '06

Hi, I get the following error compiling with MSVC toolset arhcitecture=x86 address-model=64: C:\boost-cvs\boost\boost/numeric/interval/hw_rounding.hpp(36) : fatal error C1189: #error : Boost.Numeric.Interval: Please specify rounding control mechanism. The source code is taken form RC4 head today (15-aug-2006). Is there something wrong with my setup or it's a feature ;-)? In header file that there is no handling of x64 whatsoever. So, it should be a feature. Can anyone advice an acceptable workaround? Artem.

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Re: [Boost-users] Boost serialization xml format and xml comments
by Todd Greer 15 Aug '06

15 Aug '06

Matt Schuckmann wrote: > Since the Serialization library doesn't use a complete xml > grammar (like what is provided on the Spirit examples page) and since it > doesn't let Spirit see the entire text it isn't quite as easy as it > might seem to make it work. So far I've gotten it to ignore comments > before and after most tags but I'm not sure if it'll work in the general > case. I wonder if, long term, it might be worth rewriting xml_iarchive to use a Spirit grammar for the overall parser. Robert, is there a particular rationale for the hybrid approach that you used, or is that just a product of how familiar you were with Spirit at the time? -- Todd Greer <at Affinegy dot com, tgreer>

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Using boost compiled with VC++ 8.0 on VC++ 6.0
by Matthias Hofmann 15 Aug '06

15 Aug '06

Hello everybody, I have just successfully compiled boost 1.33.1 with Visual C++ 8.0 Express Edition and it seems to work fine with that compiler. Unfortunately, I am still forced to use Visual C++ 6.0 for applications that include dialogs and other resources, as the Express Edition of Visual C++ 8.0 does not support these. Now I wonder if the boost libraries I have compiled with Visual C++ 8.0 Express Edition are also compatible with Visual C++ 6.0? -- Matthias Hofmann Anvil-Soft, CEO http://www.anvil-soft.com - The Creators of Toilet Tycoon http://www.anvil-soft.de - Die Macher des Klomanagers

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Boost serialization xml format and xml comments
by Matt Schuckmann 15 Aug '06

15 Aug '06

Is there a reason why the xml parser for the Serialization library can't handle comments in the xml files? Or was this just an oversight. Has anybody modified the grammar so that it will work with comments in the xml files? Thanks Matt S.

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