August 2006 - Boost-users - lists.preview.boost.org

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

16 Aug '06

> Hi Freddie. > >> 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? :) > > Hmmm... I do not think I explained myself clearly enough the last > time. :-) > > If you look at the header files I sent you they already have platform > detection guards in them. And the whole point of those headers is to > have them and only them contain the platform detection and the > necessary pragmas. After that you just use those BoostWrappers > headers instead of the original ones from boost. That means that you > add NO EXTRA LINES to any of your own hundred header/source > files. :-) > > I also told you that we at first had the same fears as you, but as it > turns > out actually very few boost libraries cause warnings and so there are > actually very few of those BoostWrappers headers. Look the archive > I attached in the last message - there are less maybe 10-20 files in there > and their contents is very stable. Adding new ones is rare and when it > does happen it happens natually - compiling your other code tells you > directly which warnings to disable and in which header files. > > Hope this clears things up... :-) > > Best regards, > Jurko Gospodnetic Sure it does. I guess this is one of the best approach I can see for now. But I had problem getting the attachment you mentioned from your previous post. (I didn't see any attachment.) Is it possible that you send the header files again? Sorry for the trouble. Cheers, Freddie

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Re: [Boost-users] Problem building for VC-8
by Bob Cowdery 16 Aug '06

16 Aug '06

Johan I did get a build by copying the msvc vc8 extension text into a file vc8-tools.jam and then using -sTOOLS=vc8 on the command line. I don't know if this is the correct way or not but it seemed to work. Bob -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org]On Behalf Of Johan Nilsson Sent: 16 August 2006 07:36 To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] Problem building for VC-8 Bob Cowdery wrote: > 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. This isn't really a reply to your question, but did you try the installer at: http://boost-consulting.com/download.html // Johan _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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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> > > Oh. You are looking at Fusion1. That was the pre-review version. > We now have Fusion2 (which I will put in the CVS soon) which is > the review version. Sorry for the confusion. I played a bit with this pre review wersion (which is accidentaly in the released boost version 1.33.1), and I sort of getting stuck when I am trying to put arrays into the tuple with make_tuple(). Is there a way to do it? Thx ImRe

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

16 Aug '06

From: David Abrahams <dave(a)boost-consulting.com> > Is it possible to do this trick during compilation time? > I was able to go from type lists to boost::cons but I can't find a way > to make that last step. Not sure what you mean by "that last step..." namespace mpl = boost::mpl; using namespace mpl::placeholders; typedef mpl::vector<int, long, char const*> types; typedef mpl::fold<types, boost::cons<_2,_1> >::type tuple_type; tuple_type some_tuple; When I try to compile this, I receive the following error: boost/mpl/aux_/preprocessed/plain/apply_wrap.hpp(48) : error C2039: 'apply' : is not a member of 'boost::mpl::na' What does this means? Thx ImRe

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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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