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

composing with boost::bind
by Pieter Op de Beeck 11 Jul '07

11 Jul '07

Hi, I would like to accomplish the following: "bind a functor to a reference and compose this with another functor". Ultimately I would like to use this composition with the reference embedded in it. If I write it like this: functor_type h = bind(f, bind(g, ref(b))); it works alright. However, in my situation the binding of g is done somewhere else in the program, so have: functor_type temp = bind(g, ref(b)); ... functor_type h = bind(f, temp); Sadly enough this does not appear to work. I don't have a reference to b in h(). I'm sure bind works the way it was intended. I'm more interested in whether you guys now how to achieve the effect I'm trying to achieve? Much appreciated, Pieter. Some additional context: using namespace boost; typedef function<bool ()> functor_type; struct f { bool operator()(bool b) { return !b; } }; struct g { bool operator()(bool b) { return b; } }; bool b; The effect I'm trying to achieve: b = true; b = h(); // produces !b, so b is now false b = h(); // produces !b, so b is now true (in the second case above this would produce false again because there appears to be no reference to b in h()) Pieter Op de Beeck www.visysglobal.com

2 2

Boost with threadpool
by Gopalan, Srinivasan (MLITS) 11 Jul '07

11 Jul '07

Hi all, I would like to know whether any version of boost uses threadpool. Also there is a separate threadpool package. I would like to know how to link this package with boost. Thanks, Srini. -------------------------------------------------------- This message w/attachments (message) may be privileged, confidential or proprietary, and if you are not an intended recipient, please notify the sender, do not use or share it and delete it. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Merrill Lynch. Subject to applicable law, Merrill Lynch may monitor, review and retain e-communications (EC) traveling through its networks/systems. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or error-free. This message is subject to terms available at the following link: http://www.ml.com/e-communications_terms/. By messaging with Merrill Lynch you consent to the foregoing. --------------------------------------------------------

2 1

[IBD] Weekly news: 2007-07-04 to 2007-07-10
by Matias Capeletto 11 Jul '07

11 Jul '07

================================================== Hi Boost, Once a week, we will send you a brief of our work for the Improving Boost Docs project. We need more hands, join us! We are waiting you on the boost-docs list. Project Wiki: http://svn.boost.org/trac/boost/wiki/ImprovingBoostDocs RSS news feed: http://beta.boost.org/development/ibd_news.rss Community Blog: http://improving-boost-docs.blogspot.com ================================================== 2007-07-10 ------------------------------------------------------------------------------------- * Jake joins the community Blog He writes: I feel that it would be helpful if there was a little bit of standardization in the layout/content of the documentation. A lot of the documentation implements similar ideas (one minute tutorials, introductions, reference sections), but each individual libraries documentation has the earmarks of the authors. more... http://tinyurl.com/3btnae 2007-07-09 ------------------------------------------------------------------------------------- * Resources Section added to the Community Blog "The Blog is a one-stop shop" -- Stjepan more... http://improving-boost-docs.blogspot.com 2007-07-08 ------------------------------------------------------------------------------------- * Two proof-readers join the project Thanks Paul Giaccone and Jake Voytko for jumping in. more... http://tinyurl.com/2optqg * Boost community feedback on our objectives Since we want to build a long term subcommunity which main purpose is to continuously improve the quality of Boost documentation, we would like that our main directives be aligned with the Boost community as a whole. more... http://tinyurl.com/3czjfn 2007-07-07 ------------------------------------------------------------------------------------- * Resources Section added to the Wiki At IBD we use several open source tools to organize our efforts. In this section the purpose of each resource is explained. When possible, IBD resources will be interlinked and share a common look and feel allowing a consistent experience for both users and developers. more... http://tinyurl.com/2uxfut#Resources 2007-07-06 ------------------------------------------------------------------------------------- * Help request, A woman's point of view Is there any female Booster willing to help us? more... http://tinyurl.com/2om8ek * Stjepan joins the community Blog He add a post about his experience transalting smart_ptr docs. more... http://tinyurl.com/3d3r93 * Help request, Python programmers There are two specific projects that need Python programmers: 1) http://svn.boost.org/trac/boost/wiki/BoostSpecificWikiMacros 2) http://svn.boost.org/trac/boost/wiki/QuickbookWikiProcessor more... http://tinyurl.com/2lqe2p * Two testers join the project Stuart help request was answered by Chun Ping Wang and Marco. Welcome to IBD! more... http://tinyurl.com/323uf5 2007-07-05 ------------------------------------------------------------------------------------- * IBD RSS news feed The IBD news feed consists of formal announces about the things going on in the project, they are very short and direct headlines. Some of the common subjects are new members, new subprojects, help requests and completed translation. more... http://beta.boost.org/development/ibd_news.rss * New Community Blog A record of the things that happens behind the scenes, our next objectives and the social and philosophical aspects of IBD. more... http://improving-boost-docs.blogspot.com 2007-07-04 ------------------------------------------------------------------------------------- * Translation of Boost.Boostbook completed We have translated boostbook docs to quickbook and add a sections about boosbook specific HTML params. more... http://tinyurl.com/32zgtm * Our team mascot Give a warm welcome to Mafalda, our team mascot. She is a English Springer Spaniel from Argentina, currently living with Matias. Mafalda is helping him with the project Wiki page. She just barks once in a while, but that is a lot. more... http://tinyurl.com/2uxfut#team_mascot * Stuart Dootsoon's help request for the Browser testing project We need more testers to cover all the possible browsers and platforms combinations. more... http://tinyurl.com/2q6csw

1 0

Re: [Boost-users] problem message bis new
by question boost 11 Jul '07

11 Jul '07

They say: step 1 run buil.bat step 2 set BOOST_ROOT and BOOST_BUILD_PATH. I've runed build.bat and I have set BOOST_ROOT and BOOST_BUILD_PATH. It's not the right thing to do. My question is (only for a programmer who has the response): What is the right thing to do (step 1,step 2, step3, step4, step5, step 6 and so on)? Thank You > From: ghost(a)cs.msu.su> To: boost-users(a)lists.boost.org> Date: Wed, 11 Jul 2007 11:34:16 +0400> Subject: Re: [Boost-users] problem message bis new> > question boost wrote:> > > > > Hi,> > I repeat: the version of Boost is not the solution of the problem message.> > What must I do now after the run of build.bat and the set of the two main> > variables?> > Let me start with some trivial aspects.> > 1. Reposting a question every day is not polite. There's no guaranteed> 24-hour response time here.> > 2. It would be more polite if you messages had your real name in> the "From" field. I presume "question boost" is not your real name.> > As for your question, you don't seem to have followed the getting started document.> Setting BOOST_ROOT and BOOST_BUILD_PATH without building boost is not> going to have any effect whatsoever.> > - Volodya> > _______________________________________________> Boost-users mailing list> Boost-users(a)lists.boost.org> http://lists.boost.org/mailman/listinfo.cgi/boost-users _________________________________________________________________ Besoin d'un e-mail ? Créez gratuitement un compte Windows Live Hotmail et gagnez du temps avec l'interface à la Outlook ! http://www.windowslive.fr/hotmail/default.asp

2 1

Weird compile error on VS .NET 2003 with boost::property
by gast128 11 Jul '07

11 Jul '07

Dear all, we upgraded yesterday to boost 1.34 but now ran in a weird compile error on vstudio 2003 (sp1) when using boost properties (or indirect through use of graph) and an enumerate enlosed by a namespace. E.g.: namespace Bla { struct Dummy {}; enum Foo { eFoo }; } void Example3() { boost::property<int, Bla::Dummy> prop1; //ok boost::property<int, Bla::Foo> prop2; //error } It gives something like: error C2065: 'Foo' : undeclared identifier. It chokes on the line: template <class Tag, class T, class Base = no_property> struct property : public Base { ... #if BOOST_WORKAROUND (__GNUC__, < 3) property() { } #else property() : m_value() { } <---- #endif Anyone an idea? Wkr, me

1 0

problem message bis new
by question boost 11 Jul '07

11 Jul '07

Hi, I repeat: the version of Boost is not the solution of the problem message. What must I do now after the run of build.bat and the set of the two main variables? Thank You _________________________________________________________________ Windows Live Messenger vous offre 30 nouvelles émoticônes gratuites, installées directement dans votre Messenger ! http://www.emoticones-messenger.fr/

2 1

the thread safe boost serialization library is thread safe?
by Fei Liu 11 Jul '07

11 Jul '07

I am testing a multi-thread app which uses boost serialization library..I got the dreaded error: *** glibc detected *** double free or corruption (fasttop): 0x0aed93d0 *** Aborted Using a core dump and gdb, here is a backtrace. It appears it crashed inside the multi-thread library. Any advice is appreciated.. #0 0xb7f9a6be in boost::serialization::extended_type_info::type_info_key_cmp () from /usr/lib/libboost_serialization-gcc34-mt-1_34.so.1.34.0 (gdb) bt #0 0xb7f9a6be in boost::serialization::extended_type_info::type_info_key_cmp () from /usr/lib/libboost_serialization-gcc34-mt-1_34.so.1.34.0 #1 0xb7f9a6f2 in boost::serialization::extended_type_info::operator< () from /usr/lib/libboost_serialization-gcc34-mt-1_34.so.1.34.0 #2 0xb7f9b43e in std::_Rb_tree<boost::serialization::extended_type_info const*, boost::serialization::extended_type_info const*, std::_Identity<boost::serialization::extended_type_info const*>, boost::serialization::detail::tkmap::type_info_compare, std::allocator<boost::serialization::extended_type_info const*> >::insert_unique () from /usr/lib/libboost_serialization-gcc34-mt-1_34.so.1.34.0 #3 0xb7f9adfb in boost::serialization::extended_type_info::self_register () from /usr/lib/libboost_serialization-gcc34-mt-1_34.so.1.34.0 #4 0x08053c23 in boost::archive::detail::iserializer<boost::archive::xml_iarchive, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > >::load_object_data (this=0x805ba7c, ar=@0x933f71e0, x=0x933f73a8, file_version=2470408016) at extended_type_info_typeid.hpp:77 #5 0xb7f91900 in boost::archive::detail::basic_iarchive::load_object () from /usr/lib/libboost_serialization-gcc34-mt-1_34.so.1.34.0 #6 0x080537a7 in boost::archive::detail::iserializer<boost::archive::xml_iarchive, ns::ge::rule>::load_object_data (this=0x805ba60, ar=@0x933f71e0, x=0x933f73a8, file_version=4) at iserializer.hpp:143 #7 0xb7f91900 in boost::archive::detail::basic_iarchive::load_object () from /usr/lib/libboost_serialization-gcc34-mt-1_34.so.1.34.0 #8 0x08052c82 in utils::xml::deserialize<ns::ge::rule> (s=@0x4, is=@0xb7fb7f1e) at iserializer.hpp:143 #9 0x08052f41 in ns::ge::rules<ns::ge::rule>::process_xml (this=0x805b9a0, xml=@0x933f7410) at ns_ge_rules.h:54 #10 0x08053353 in ns::ge::rule_server<ns::ge::rules<ns::ge::rule>, pthread::thread_pool> (arg=0xb7fb7f1e) at ns_ge_rule_listener.h:47 #11 0xb7bb73b0 in start_thread () from /lib/tls/libpthread.so.0 #12 0xb79f426e in clone () from /lib/tls/libc.so.6

5 7

Re: [Boost-users] [wave] compling error - error C2001: newline inconstant
by Hartmut Kaiser 10 Jul '07

10 Jul '07

Hi, > I　have been using boost wave library without much problems so > far. But recently when I was trying to compile our program > with UNICODE mode using > VC++ 2005 Express, I got this compile error: > > c:\users\tools\boost\boost_1_34_0\boost\wave\util\cpp_macromap .hpp(683) : > error C2001: newline in constant > > It complains about the following lines: > > argument->push_back(token_type(T_PLACEMARKER, "?, [snip] > It was strange to me that without setting to UNICODE mode, I > did not have this problem. This has been fixed in Boost::CVS head already. Please replace the "$" by a "\xA7". > Another interesting thing is that if I added the closing > double quate " and changed the line as to below, the compile > error went away: > > argument->push_back(token_type(T_PLACEMARKER, "?", Don't do that. Wave is relying on a specific character there. > But I am not sure if I am doing right thing and not sure if > the wave developer really missed closing double quate. The double quote has been eaten by your unicode editor. HTH Regards Hartmut

1 0

intrusive_ptr and NULL value
by Pavel Syomin 10 Jul '07

10 Jul '07

Hi, guys! I found embarrassing difference between shared_ptr::operator*() and intrusive_ptr::operator*() behavior (even the same I can say about operator ->). At first, look on shared_ptr: reference operator* () const // never throws { BOOST_ASSERT(px != 0); return *px; } If shared_ptr object has NULL value and someone call operator*(), it will throws exception. But if we look on intrusive_ptr(): T & operator*() const { return *p_; } we can see, that pointer don't checks.... Is it an imperfection or a feature?

2 3

feature for multidimensional binary tree
by valentin julien 10 Jul '07

10 Jul '07

I have heard about your library from a friend and badly i haven't found some kind of template binary tree implementation... What i'm working on is a multi dimensional binary tree to make Quadtrees Octrees or more.... And I want to make genericity to put several types of object in the same Leaf of my tree... I think this idea sounds like a cool stuff ...Is there laready any structure in Boost that can be use like it ? Or What do you think of this feature? ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************

3 5

Re: [Boost-users] boost library for SQL
by Ovanes Markarian 10 Jul '07

10 Jul '07

On Tue, July 10, 2007 08:04, Meryl Silverburgh wrote: > Hi, > > Does boost library has library in c++ for SQL? If not, does anyone know if there is a c++ library for sql? > > Thank you. > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > Please take a look at SOCI at http://soci.sourceforge.net/ This is a really great lib! With Kind Regards, Ovanes Markarian

3 3

boost library for SQL
by Meryl Silverburgh 10 Jul '07

10 Jul '07

Hi, Does boost library has library in c++ for SQL? If not, does anyone know if there is a c++ library for sql? Thank you.

3 2

[serialization] hacking serialization : handles to pointers
by Sean Cavanaugh 10 Jul '07

10 Jul '07

Ok I've spent a good chunk of my day making a set of custom archive class, based on the portable_binary_iarchive and portable_binary_oarchive. I have a non-virtual class hierarchy named Asset, in memory this is a cyclic graph, but my requirements are that this structure cannot be serialized all at once, it has to be broken up at boundaries. So the archiver serializes the first Asset* (which is always the root object passed into operator&). This object serializes as normally as per the boost serialization code, except except that when subsequent Asset*'s are encountered I send the pointer into an AssetManager class and translate the Asset* into a ResourceID, and serialize the ResourceID instead of the object. This is done by directly calling operator& inside save_override. So far all of this works: The reverse case of loading, by hooking load_override almost works. Almost, because I have to apply a hack of skipping 4 bytes inside load_override, before trying to read the ResourceID structure with operator&. I can't figure out how to make it 'proper', without simply hard coding the 4 byte read. As far as I can tell before save_override some bookkeeping information is written, but the reverse operation in load_override has not yet stripped this bookkeeping information from the stream, so these functions aren't quite mirror operations. As best as I can tell the function guilty of reading the bookkeeping information is load_pointer. What I need is another function in the boost archive API that pulls the bookkeeping information out of the stream safely, that I can call from within load_override, since I have no intention of calling load_pointer through any means. Aside from the hack, it technically works, but even then I still have a few aching problems: I also have to hard-code the full list of derived Asset types and manually provide specializations for all of them in save_override and load_override. If I use the base class, I end up slicing my class down to its base, and cannot serialize it. I can't make serialize virtual, since the intrusive serialize methods are templates, but it certainly would solve the problem if it were possible. In addition the bodies of all of my overrides are completely identical except for the classname (AssetModel, AssetTexture, etc). Which means I'll be wrapping the bodies of a generic save_override and load_override in a macro, and have to manually add all Asset derived classes to a list of classes inside my archive class. Which means that my archiver cannot be generic, even though I have managed to make it a template in the sense that the passed in asset manager and base asset types are template parameters. the type ResourceID is a std::string saving... class asset_oarchive : ... void save_override(const AssetModel& t, int i) { if (!RootAssetSaved) { RootAssetSaved = true; binary_oarchive_impl::save_override(t, i); } else { AssetManagerType::ResourceID ResourceId = TheAssetManager->ResourceIdForAsset(&t); operator&(ResourceId); } } loading ... class asset_iarchive : ... void load_override(AssetModel*& t, int i) { if (!RootAssetLoaded) { RootAssetLoaded = true; binary_iarchive_impl::load_override(t, i); } else { unsigned char c[10]; for (INT x=0; x<10; ++x) { c[x] = 0xFF; } for (INT x=0; x<4; ++x) { operator&(c[x]); //hackhack } AssetManagerType::ResourceID ResourceId; operator&(ResourceId); AssetType* a = TheAssetManager->FindAsset(ResourceId); if (!a) { a = TheAssetManager->LoadAsset(ResourceId); } // TODO: throw on missing resources, potentially query asset manager for substitutes t = static_cast<AssetModel*>(a); } } So I have a working implementation, how do I make it better?

2 2

Re: [Boost-users] wrapping stdlib fstream with boost filtering streams
by Daniel Oberhoff 10 Jul '07

10 Jul '07

Hi, egoots <egoots(a)gmail.com> writes: >> 1) does the compressor flush the zlib compression buffer when I flush/ >> pop it? > > As I understand it, pop() and reset() both flush and close the current > device and then destroy it. Well, but I explicitly switched the auto_close feature off... >> 2) is fstream a bidirectional stream (my guess due to separate seekg/ >> seekp methods) or a seekable stream (one read/write head)? Because I >> currently require the former. >> >> btw: the above code runs without exceptions, but when I read back >> variables I have just written they are garbled. > > You should read the thread of messages at... there may be some relevant > info here: > http://thread.gmane.org/gmane.comp.lib.boost.user/13824 > > Especially the replies by Jonathan Turkanis Well, there he says that strict_sync is there to switch filters, but it wouldn't make sense to use it before all the data is compressed. but that is exactly the point: all the data IS compressed. Matlab files effectively consist of carefully concatenated compressed and uncompressed files. Effectively I could take out a compressed block from a matlab file and send it to gunzip. Also, in my code strict_sync returns true, unlike what the original poster in the mentioned thread has experienced, indicating that all has been flushed and written and switching filters is ok. I also check after every pop() if the fstream has been closed, and it has not. Using a different z stream wrapper (zipstream) works (mostly) and gives me the original data, while the boost approach gives me zeros. Well, I will try to make a simpler test case, since the program is quite complex. thanks 4 the reply Daniel

1 0

Re: [Boost-users] Réf. : Problem message bis
by question boost 10 Jul '07

10 Jul '07

> Now I do:> cd C:\Documents and Settings\Administrateur\Bureau\boost_1_33_1\boost_1_33_1\tools\build\jam_src> C:\Documents and Settings\Administrateur\Bureau\boost_1_33_1\boost_1_33_1\tools\build\jam_src\build.bat> Then I set the following variables:> BOOST_ROOT= C:\Documents and Settings\src\boost> and BOOST_BUILD_PATH=C:\Documents and Settings\Administrateur\Bureau\boost_1_33_1\boost_1_33_1\tools\build\v2. The problem is the same. I don't know what to do now in order not to get the message any more. Thank you for your response. > To: boost-users(a)lists.boost.org> Wrom: HAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZUNNYCGPKYLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIBGDADRZFSQHYUCDDJBLVLMHAALPTCXLYRWTQTIPWIGYOKSTTZRCLBDXRQBGJSNBOHMKHJYFMYXOEAIJJPHSCRTNHGSWZIDREXCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSFDULHPQQWOYIYZU _________________________________________________________________ David Guetta a réuni les sons les plus connus de Messenger dans le Mix Messenger, le son de l’été ! Téléchargez-le gratuitement ! http://specials.divertissements.fr.msn.com/mixmessenger

1 0

boost::lambda::bind - a better name?
by Maciek Godek 10 Jul '07

10 Jul '07

Wouldn't it be better if boost::lambda::bind was named boost::lambda::call (or boost::lambda::eval, to make it more lispish), in order to: -avoid the confusion and potential overlap with boost::bind -make the name more sensible within lambda expressions, especially when "binding" nullary functions, ie. int six() { return 6; } if_(call(six) == 6) [ ... ] IMHO looks better than if_(bind(six) == 6) [ ... ] Yours, Chuj

2 1

boost::lambda library, error with << operator (on g++ with SGI STL)
by Maciek Godek 10 Jul '07

10 Jul '07

Hi, I've tried to compile the following code on linux/g++ (version 3.3.4 and 4.1.2), boost version 1.34: -- CODE BEGINS -- #include <iostream> using namespace std; #include "boost/function.hpp" #include "boost/ref.hpp" using namespace boost; #include "boost/lambda/lambda.hpp" #include "boost/lambda/bind.hpp" #include "boost/lambda/if.hpp" using namespace boost::lambda; int main(int argc, char *argv[]) { function<void (int, int)> f = if_(_1 == _2) [ cout << cref("arguments are equal\n") ].else_[ cout << cref("arguments differ\n") ]; f(1, 1); f(1, 2); } -- CODE ENDS -- On g++ 3.3.4 I got a (scarcely readable) error that std::ios_base copy constructor is private (the more recent compiler gave much more trashy output, but I've infered that the reason is probably the same). The error wouldn't appear if I had supplied at least one placeholder to the operator<< in both if's cases in the lambda expression above. Is there any way to overcome this limitation?

2 1

Does boost offer a random permutation function?
by Jeffrey Holle 09 Jul '07

09 Jul '07

I am looking for a function that randomly selects a permutation of a sequence. For instance given "1,2,3", it would produce something like "2,1,3" randomly selected from all possible permutations. I could code this myself by creating a container with all possible permutations and randomly selecting one, but this isn't reasonably if the size of the sequence gets larger. I've looked on the web and found an old 4 line FORTRAN subroutine that appears to do this. If boost don't already have this, I will attempt to convert this to C++.

2 2

Test Library documentation URL errors
by Number Cruncher 09 Jul '07

09 Jul '07

I was trying to browse the Unit Test Framework (part of Boost Test Library) and received the following: An error has been encountered in accessing this page. 1. Server: boost.org 2. URL path: /libs/test/doc/components/utf/getting_started/index.html 3. Error notes: File does not exist: /home/groups/b/bo/boost/htdocs/libs/test/doc/components/utf/getting_started/index.html 4. Error type: 404 5. Request method: GET 6. Request query string: 7. Time: 2007-07-09 03:07:29 PDT (1183975649) Also, none of the example source code seems to be linked, e.g: http://boost.org/libs/test/example/unit_test_example1.cpp

2 1

[Boost.Python] Issues When Object Created in C++ and Then Used From Python
by Lawrence Spector 09 Jul '07

09 Jul '07

I created an example of code that demonstrates the error. Here's what the code looks like, as of right now: PythonPassReference.cpp: #include <boost/python.hpp> #include "TestClass.hpp" #include "TestClassWrap.hpp" #include <iostream> using namespace boost::python; int main() { try { Py_Initialize(); object main_module(( handle<>(borrowed(PyImport_AddModule("__main__"))))); object main_namespace = main_module.attr("__dict__"); TestClass testClass(std::cout, 3, 9.6f, 'Q'); { handle<> ignored((PyRun_String( "import PythonInterface" , Py_file_input , main_namespace.ptr() , main_namespace.ptr()) )); } TestClassWrap testClassWrapper(testClass); boost::python::object pyTestClass(testClassWrapper); // Works: pyTestClass.attr("output")(); { handle<> ignored((PyRun_String( // Works: "pyTestClass = PythonInterface.TestClass(6, 8.3, 'W')\n" "pyTestClass.output()\n" // Error unless the previous line is uncommented , Py_file_input , main_namespace.ptr() , main_namespace.ptr()) )); } } catch(boost::python::error_already_set& e) { std::cerr << "Caught error_already_set" << std::endl; if (PyErr_Occurred() != 0) { PyErr_Print(); } // end if } catch(...) { std::cerr << "Caught unknown error" << std::endl; } // end try-catch std::cin.get(); return 0; } // end main TestClass.hpp: #pragma once #include <iostream> class TestClass { private: std::ostream& m_outStream; int m_x; float m_y; char m_z; public: TestClass(std::ostream& p_outStream, int p_x, float p_y, char p_z) : m_outStream(p_outStream), m_x(p_x), m_y(p_y), m_z(p_z) { } // end TestClass ~TestClass() { } // end TestClass void output() { m_outStream << "x = " << m_x << ", y = " << m_y << ", z = " << m_z << "\n"; } // end callMethod }; // end TestClass TestClassWrap.hpp: #pragma once #include "TestClass.hpp" class TestClassWrap { private: TestClass m_testClass; public: TestClassWrap(const TestClass& p_testClass) : m_testClass(p_testClass) { } // end TestClassWrap TestClassWrap(int p_x, float p_y, char p_z) : m_testClass(std::cout, p_x, p_y, p_z) { } // end TestClass ~TestClassWrap() { } // end TestClass void output() { m_testClass.output(); } // end callMethod }; // end TestClassWrap PythonInterface.cpp (Built with BJam, makes PythonInterface.pyd, PythonInterface.lib): #include <string> #include <boost/python.hpp> #include <iostream> #include "TestClass.hpp" #include "TestClassWrap.hpp" using namespace boost::python; BOOST_PYTHON_MODULE(PythonInterface) { class_<TestClassWrap>("TestClass", init<int, float, char>()) .def("output", &TestClassWrap::output) ; } // end module As you can see in the example above, I have an object which I wrap and then pass to python as follows: TestClassWrap testClassWrapper(testClass); boost::python::object pyTestClass(testClassWrapper); This works just fine, and I can call methods on the object. However, when I try to run it as a string (as it would be if read from a .py script file), I get an error. Here's the code for that: { handle<> ignored((PyRun_String( "pyTestClass.output()\n" // Error unless the previous line is uncommented , Py_file_input , main_namespace.ptr() , main_namespace.ptr()) )); } Which produces the following error (based on my catching and outputting the error): Caught error_already_set Traceback (most recent call last): File "<string>", line 1, in <module> NameError: name 'pyTestClass' is not defined So, I guess the question is, how do I expose an instance called pyTestClass, in such a way, that I can call methods on it from a script? Or is there some mistake I'm making, that's preventing this from fully working? Thanks in advance, Lawrence

2 1

[program options] making options lower case???
by Ovanes Markarian 09 Jul '07

09 Jul '07

Hello! is there any chance to make some specific option values being lower case? With Kind Regards, Ovanes

1 0

Problem message bis
by question boost 09 Jul '07

09 Jul '07

Hi, using Code Blocks i got the following message: ld.exe "Cannot find -lboost_filesystem-mgw-mt-s-l_33_l" Then I do: cd C:\Documents and Settings\Administrateur\Bureau\boost_1_34_0\boost_1_34_0\tools\jam\src then C:\Documents and Settings\Administrateur\Bureau\boost_1_34_0\boost_1_34_0\tools\jam\src\build.bat Then I set the following variables: BOOST_ROOT= C:\Documents and Settings\src\boost and BOOST_BUILD_PATH=C:\Documents and Settings\src\boost\tools\build\v2. I don't know what to do now. It's a question like the other questions, so thank you for your response. _________________________________________________________________ David Guetta a réuni les sons les plus connus de Messenger dans le Mix Messenger, le son de l’été ! Téléchargez-le gratuitement ! http://specials.divertissements.fr.msn.com/mixmessenger

2 1

Réf. : [boost] Réf. : Re: [filesystem] building for cygwin
by frederic.bron＠alcan.com 09 Jul '07

09 Jul '07

Finally, I had a close look inside filesystem files and I discovered that to compile for cygwin 2 flags must be set: BOOST_POSIX_API and BOOST_POSIX_PATH! If only BOOST_POSIX_API, BOOST_WINDOWS_PATH is set automatically. Why??? This is a strange behaviour. Then: - either change the doc and add that for cygwin compilation, BOOST_POSIX_PATH must be set as BOOST_POSIX_API, - or change filesystem/config.hpp so that BOOST_POSIX_PATH is automatically set when BOOST_POSIX_API is set (I would prefer this solution). Regards, F. Bron frederic.bron@alca n.com Pour : boost(a)lists.boost.org Envoyé par : cc : (ccc : Frederic Bron/Alcan) boost-bounces@list Objet : [boost] Réf. : Re: [filesystem] building for cygwin s.boost.org 08/07/2007 19:32 Veuillez répondre à boost My problem is that I compiled 1.34.0 with -DBOOST_POSIX_API and it did not produce what it was suppose to produce, i.e. posix paths. F. Bron Lewis Hyatt <lhyatt@princeton. Pour : boost(a)lists.boost.org edu> cc : (ccc : Frederic Bron/Alcan) Envoyé par : Objet : Re: [boost] [filesystem] building for cygwin boost-bounces@list s.boost.org 08/07/2007 18:34 Veuillez répondre à boost I know it's possible because the cygwin package maintainer for boost re-compiled the boost 1.33.1 package for me a while ago to include -DBOOST_POSIX_API, to get the expected behavior on cygwin. If you post this to the cygwin mailing list (you can get at http://news.gmane.org/gmane.os.cygwin/ if you don't want to subscribe to the mailing list), I'm sure he can help you out. -Lewis frederic.bron(a)alcan.com wrote: > Maybe the developpers list can help? I try to have the POSIX behaviour under cygwin but get only the windows behaviour even if I compile the library and program with -DBOOST_POSIX_API. > What should I do? > > Regards > > F. Bron > > > frederic.bron(a)alcan.com > Envoyé par : Pour : boost-users(a)lists.boost.org > boost-users-bounces@list cc : (ccc : Frederic Bron/Alcan) > s.boost.org Objet : [Boost-users] Réf. : [filesystem] building for cygwin > > > 07/07/2007 15:13 > Veuillez répondre à > boost-users > > > > > > > > Unbelievable! It does not work anymore!!! I have rebuild again the library to be sure that g++ received well -DBOOST_POSIX_API and it does. > However, here is the output of the small program printed below: > > $ g++ -DBOOST_POSIX_API -I/cygdrive/d/Softs/boost_cyg/include -o toto toto.cc /cygdrive/d/Softs/boost_cyg/lib/libboost_filesystem.a > $ ./toto > ..\toto\x.xml > \cygdrive\d\toto\x.xml > > should be > ../toto/x.xml > /cygdrive/d/toto/x.xml > > What should I do? > > F. Bron > > #include <iostream> > #include <boost/filesystem.hpp> > > namespace fs=boost::filesystem ; > > int main() { > fs::path x("../toto/x.xml") ; > std::cout << x.file_string() << std::endl ; > fs::path y("/cygdrive/d/toto/x.xml") ; > std::cout << y.file_string() << std::endl ; > return 0 ; > } > > Avis : > Ce message et toute pièce jointe sont la propriété d'Alcan et sont destinés seulement aux personnes ou à l'entité à qui le message est adressé. Si vous avez reçu ce message par erreur, veuillez le > détruire et en aviser l'expéditeur par courriel. Si vous n'êtes pas le destinataire du message, vous n'êtes pas autorisé à utiliser, à copier ou à divulguer le contenu du message ou ses pièces jointes > en tout ou en partie. > > Notice: > This message and any attachments are the property of Alcan and are intended solely for the named recipients or entity to whom this message is addressed. If you have received this message in error > please inform the sender via e-mail and destroy the message. If you are not the intended recipient you are not allowed to use, copy or disclose the contents or attachments in whole or in part. > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > _______________________________________________ > Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost > _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost

1 0

Problem message
by question boost 09 Jul '07

09 Jul '07

Hi, using Code Blocks i got the following message: ld.exe "Cannot find -lboost_filesystem-mgw-mt-s-l_33_l" Then: cd C:\Documents and Settings\Administrateur\Bureau\boost_1_34_0\boost_1_34_0\tools\jam\src then.\\build.bat. Then I set the following variables: BOOST_ROOT= C:\Documents and Settings\src\boost and BOOST_BUILD_PATH=C:\Documents and Settings\src\boost\tools\build\v2. I don't know what to do now. So what must I do now in order not to get the message any more? Be clear. Thank You _________________________________________________________________ Le blog Messenger de Michel, candidat de la Nouvelle Star : analyse, news, coulisses… A découvrir ! http://michel-nouvelle-star2007.spaces.live.com/

1 0

[mpi] shared_ptr + packed_iarchive
by Andras Joo 09 Jul '07

09 Jul '07

Dear All, I'm facing the following problem. I have the following class hierarchy: AbstractBase <--- AbstractDerived <---- ConcreteDerived I managed to make the serialization of shared_ptr<AbstractBase> using text and binary archives (text_[i/o]archive, binary_[i/o]archive), tested, and works fine. However, when I try to send an shared_ptr<AbstractBase> with some MPI function, the compiler complains about packed_iarchive not having append() and reset() functions. /home/jooam/usr/include/boost-1_35/boost/serialization/shared_ptr.hpp:129: error: 'class boost::mpi::packed_iarchive' has no member named 'append' /home/jooam/usr/include/boost-1_35/boost/serialization/shared_ptr.hpp:137: error: 'class boost::mpi::packed_iarchive' has no member named 'reset' Any help is appreciated. Thank you, Andras ____________________________________________________________________________________ Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center. http://autos.yahoo.com/green_center/

3 3