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Some quesions about boost::flyweight
by 邹磊 12 Jul '11

12 Jul '11

Hi, all. Does boost::flyweight support serialization ? If it does, could you give me a example ? I cannot find document about serialization for this library. Thanks. Regards. zou

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[1.47] PDF build of documentation available.
by John Maddock 12 Jul '11

12 Jul '11

The PDF builds of the Boost documentation are now available from: https://sourceforge.net/projects/boost/files/boost-docs/1.47.0/ Note that as ever, only the subset of libraries which use quickbook/boostbook/docbook as their documentation format are included in the build. Regards, John.

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boost::mpl and VS 2005
by narinder.claire＠uk.bnpparibas.com 12 Jul '11

12 Jul '11

Hi, The following piece of code compile successfully on VS2008,VS2010 & GCC 4.5.2 but fails to compile on VS2005. Is the likely to be because of a bug in VS2005 ? (boost v 1.46.1) ------------------------------------------------------------ #include<iostream> #include<string> #include<boost/tr1/type_traits.hpp> #include<boost/mpl/empty.hpp> #include<boost/mpl/vector.hpp> #include<boost/mpl/filter_view.hpp> #include<boost/utility.hpp> template<class T> struct is_recognised_type { static const bool value =false; }; typedef boost::mpl::vector<std::string> naked_variant_type_list; struct myclass { myclass(){} template<class T> myclass(const T&t, const typename boost::disable_if_c<is_recognised_type<T>::value,T >::type * ptr =0, const typename boost::disable_if_c< boost::mpl::empty< typename boost::mpl::filter_view< naked_variant_type_list,boost::is_convertible<T,boost::mpl::_> >::type>::value>::type * pt =0, const typename boost::enable_if_c< boost::mpl::empty< typename boost::mpl::filter_view< naked_variant_type_list,std::tr1::is_base_of<boost::mpl::_,T> >::type>::value>::type * pt2 =0) { } }; int main() { myclass m; m = "hello"; } ------------------------------------------------------------ My workaround is to collapse is_convertible and is_base_of into a single type_trait is_convertible_but_not_derived_from. and then it works. The problems seems to be that there are two trait checks, using either one individualy seems to work. Rgds Narinder ___________________________________________________________ This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and delete this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is prohibited. Please refer to http://www.bnpparibas.co.uk/en/information/legal_information.asp?Code=ECAS-… for additional disclosures.

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Lean and mean boost
by Robert Bielik 12 Jul '11

12 Jul '11

Hi all, I'm sitting here developing a build script to automate my build which first of all involves checking out sources, one of which is boost. However, 99.9% of the checkout time is boost tests/documentation/examples and what have you. It would be such a good feature to split out these stuffs so that there is a way to get to the nitty gritty jucy stuff without having to wait half a day... ;) Sorry for kicking in open doors, if that's what I'm doing ? :) Regards /Rob

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Re: [Boost-users] Boost-users Digest, Vol 2775, Issue 2
by Edward Rankin 12 Jul '11

12 Jul '11

On Thu, Jul 7, 2011 at 12:00 AM, <boost-users-request(a)lists.boost.org>wrote: > ---------- Forwarded message ---------- > From: John Maddock <boost.regex(a)virgin.net> > To: <boost-users(a)lists.boost.org> > Date: Wed, 6 Jul 2011 10:39:37 +0100 > Subject: Re: [Boost-users] [chrono] Intel Composer XE 2011 unable to > compilechrono library > >> It will happily compile. It is rather bizarre that this is necessary, >> which >> leads Vicente and I to believe that there is a bug in the Intel Compiler. >> What do you guys think? I have also posted to the Intel forums, the thread >> can be seen here: >> http://software.intel.com/en-**us/forums/showthread.php?t=**84061<http://software.intel.com/en-us/forums/showthread.php?t=84061> >> > > Looks like a bug to me - if you have a reduced test case I file a bug > report with Intel, > > HTH, John. > One of the Intel engineers has asked for more information which I have provided. I do have Premier Support, but as there is no company-specific code involved I have chosen to go for the open forum approach. I don't think I will be able to come up with a reduced test case since I am not proficient with templates and currently do not have any idea why this error is occurring. Regards, Edward

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Re: [Boost-users] [chrono] Intel Composer XE 2011 unable to compile chrono library
by Edward Rankin 12 Jul '11

12 Jul '11

Hi, 2011/7/7 <boost-users-request(a)lists.boost.org> > ---------- Forwarded message ---------- > From: Vicente Botet <vicente.botet(a)wanadoo.fr> > To: boost-users(a)lists.boost.org > Date: Wed, 6 Jul 2011 15:46:31 -0700 (PDT) > Subject: Re: [Boost-users] [chrono] Intel Composer XE 2011 unable to > compile chrono library > > Edward Rankin wrote: > > > > Hi, > > > > The purpose of this email is to get some insight on the problem we faced > > when trying to compile chrono from the 1.47 Beta 1 package. I have tried > > both the latest released compiler (2011 Update 4) and the current SP1 > > beta. > > There is no issue with VS 2010 SP1's compiler. > > > > It was first surfaced here: > > http://comments.gmane.org/gmane.comp.lib.boost.user/68421. The error > > received can be seen below: > > < snip > > > chrono.cpp > > .\boost/chrono/duration.hpp(94): error: expected an expression > > && (boost::is_convertible<Rep2, > > ^ > > > > .\boost/chrono/duration.hpp(124): error: expected an expression > > && (boost::is_convertible<Rep, > > ^ > > < snip > > > > > After some discussion with Vicente and some testing by me, it turns out > > that > > Intel was not happy with the first operand of the && operator in the > > following snippet of code: > > > > template <class Duration, class Rep2, > > bool = ( > > (boost::is_convertible<typename Duration::rep, > > typename common_type<typename Duration::rep, > > Rep2>::type>::value) > > && (boost::is_convertible<Rep2, > > typename common_type<typename Duration::rep, > > Rep2>::type>::value) > > ) > > > > > struct duration_divide_imp > > { > > }; > > > > If we place an additional parenthesis around that first operand like > this: > > > > template <class Duration, class Rep2, > > bool = ( > > ( (boost::is_convertible<typename Duration::rep, > > typename common_type<typename Duration::rep, > > Rep2>::type>::value) ) > > && (boost::is_convertible<Rep2, > > typename common_type<typename Duration::rep, > > Rep2>::type>::value) > > ) > > > > > struct duration_divide_imp > > { > > }; > > > > It will happily compile. It is rather bizarre that this is necessary, > > which > > leads Vicente and I to believe that there is a bug in the Intel Compiler. > > What do you guys think? I have also posted to the Intel forums, the > thread > > can be seen here: > > http://software.intel.com/en-us/forums/showthread.php?t=84061 > > > > Regards, > > > > Edward > > > > > > Hi Edward, > > I committed the change on the trunk. Please, let me know if there is some > issue as the I'm not able to check with Intel compilers, and the regression > test don't have a win Intel compiler. > > Thanks, > Vicente > > I have checked the release candidate and it compiles okay. Thanks. Edward

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More Boostcon videos available
by Marshall Clow 12 Jul '11

12 Jul '11

Steven's talk on Boost.Units: http://blip.tv/boostcon/boost-units-5364809 Chris' talk: Are You Ready for IPv6? http://blip.tv/boostcon/are-you-ready-for-ipv6-5364812 Matias's talk: Generic Conversion and Segmentation for Ranges: a Solution for Unicode http://blip.tv/boostcon/generic-conversion-and-segmentation-for-ranges-a-so… Boris's talk: Creating Boost.Asio extensions http://blip.tv/boostcon/creating-boost-asio-extensions-5364822 (The Other) Boris talks about: Object-relational mapping with ODB and Boost http://blip.tv/boostcon/object-relational-mapping-with-odb-and-boost-5364825 The rest later this week. -- Marshall Marshall Clow Idio Software <mailto:mclow.lists@gmail.com> A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait). -- Yu Suzuki

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serialization: binary archives from 1.44 to 1.46.1...
by Filip Peters 11 Jul '11

11 Jul '11

just ran into this, it seems binary archives made with 1.44 do not read in the latest(1.46.1) version. Since I read about fix_six.cpp, I thought let's try modifying the lib version, maybe that helps. (maybe somebody put fixes in that break other things?) If I change the lib version from 7 to 8, it reads in correctly..... if(boost::archive::library_version_type(7) == lvt){ lvt = boost::archive::library_version_type(8); fb.pubseekpos(26, std::ios_base::out); fb.sputn(reinterpret_cast<const char *>(& lvt), sizeof(lvt)); } (without it, the int at offset 0x26 is already reading wrong in the latest version....) Files from my program created with 1.44 and 1.46.1, with only one object in them, first element an int, only differed in the version byte. I'm just wondering if placing this fix in my reader code is going to work always, without delving too much in the serialization library changes. Best regards, Filip Peters

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Help is required to get the file names in a directory...........
by Amanullah Yasin 11 Jul '11

11 Jul '11

Hello, Before, with boost 1.38 and visual studio 2005, i was using following funtion to retrieve the file names in a folder. Now i switched to boot 1.46.1 and visual studio 2010, but the following method is not working. Please guide me. void Compilation::getFileNames(vector<string>& listOfFiles) { boost::filesystem::directory_iterator iterator(string(".")); for(; iterator != boost::filesystem::directory_iterator(); ++iterator) { cout << (iterator->path().filename())<< endl; listOfFiles.push_back(iterator->path().filename() ); } error: error C2440: 'initializing' : cannot convert from 'boost::filesystem3::path' to 'std::basic_string<_Elem,_Traits,_Ax>' Thanks in advance. aman *Always have your stuff when you need it with @Dropbox. 2GB account is free! http://db.tt/xOEJ2Ag*

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Compilation issue
by Alessandro Candini 11 Jul '11

11 Jul '11

I'm trying to compile an executable with the following command: g++ -Wall -pedantic -g -O3 -DDEBUG -march=native -std=c++0x -lboost_regex -o wrapCMCC wrapCMCC.cpp On an Ubuntu machine with GCC 4.5.2 and BOOST-1.42.0 I can compile without problems. But on a CentOS Linux using GCC 4.4.4 and BOOST-1.46.1 I obtain this error: In file included from /usr/include/boost/mpl/bind.hpp:27, from /usr/include/boost/mpl/lambda.hpp:18, from /usr/include/boost/mpl/iter_fold.hpp:20, from /usr/include/boost/variant/detail/initializer.hpp:27, from /usr/include/boost/variant/variant.hpp:28, from /usr/include/boost/variant.hpp:17, from cmdLine.cpp:31, from wrapCMCC.cpp:1: /usr/include/boost/mpl/apply_wrap.hpp:81:31: error: missing binary operator before token "(" /usr/include/boost/mpl/apply_wrap.hpp:173:31: error: missing binary operator before token "(" ... What does this message means? Thanks in advance... -- Alessandro Candini MEEO S.r.l. Via Saragat 9 I-44122 Ferrara, Italy Tel: +39 0532 1861501 Fax: +39 0532 1861637 http://www.meeo.it ======================================== "ATTENZIONE:le informazioni contenute in questo messaggio sono da considerarsi confidenziali ed il loro utilizzo è riservato unicamente al destinatario sopra indicato. Chi dovesse ricevere questo messaggio per errore è tenuto ad informare il mittente ed a rimuoverlo definitivamente da ogni supporto elettronico o cartaceo." "WARNING:This message contains confidential and/or proprietary information which may be subject to privilege or immunity and which is intended for use of its addressee only. Should you receive this message in error, you are kindly requested to inform the sender and to definitively remove it from any paper or electronic format."

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