July 2011 - Boost-users - lists.boost.org

weird Google page when I try to search boost.org
by Robert Ramey 05 Jul '11

05 Jul '11

http://www.google.com/custom?cof=LW%3A277%3BL%3Ahttp%3A%2F%2Fwww.boost.org%… I'm getting a weird response from google when i use the search box on the page www.boost.org. It says: We're sorry... ... but your computer or network may be sending automated queries. To protect our users, we can't process your request right now. See Google Help for more information. I've been getting for about two weeks. Originally I thought it was just a temporary thing. It hasn't gone away and now I'm wonder it if it's just me. I only get it when I use the boost.org search box. Anyone else get this? Robert Ramey

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Re: [Boost-users] weird Google page when I try to search boost.org
by Edward Rankin 05 Jul '11

05 Jul '11

On Tue, Jul 5, 2011 at 4:23 PM, <boost-users-request(a)lists.boost.org> wrote: > > From: Will Watts <willw(a)applied.co.uk> > To: boost-users(a)lists.boost.org > Date: Tue, 05 Jul 2011 09:23:36 +0100 > Subject: Re: [Boost-users] weird Google page when I try to search > boost.org > Me three. > > Will Watts > > > Not me. However, I am using https-everywhere extension with my firefox which gives me a https url. When I try it in IE, I get the same problem.

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Re: [Boost-users] [review][assign] Assign v2 review result
by er 04 Jul '11

04 Jul '11

> I would like to thank Erwann again for all his hard work, and everyone > who participated in the discussion during the review. > Likewise, I thank everyone who participated and will take their comments seriously, as summarized above. I also thank John very much for his outstanding job as a review manager. > John Bytheway > Review Manager > > _______________________________________________ > Unsubscribe& other changes: http://lists.boost.org/mailman/listinfo.cgi/boost >

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Boost::Serialization and MFC Doc/View architecture
by Colin Caprani 04 Jul '11

04 Jul '11

Hi All, I'm porting an existing MFC C++ application to use Boost::Serialization for XML files. My CDocument object contains all the data for the app. I've implemented the serialize function as: template<class Archive> void CMyDoc::serialize(Archive& ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(m_Param1) & BOOST_SERIALIZATION_NVP(m_Param2); } To capture the save and load events, in the CMyDoc.cpp file I have: BOOL CMyDoc::OnOpenDocument(LPCTSTR lpszPathName) { clear(); // clear current params //if (!CDocument::OnOpenDocument(lpszPathName)) // Old MFC serialize code // return FALSE; CEvolveTrafficDoc* pDoc = this; // pointers the same here std::ifstream ifs(lpszPathName); boost::archive::xml_iarchive ia(ifs); ia >> boost::serialization::make_nvp("MyDoc",pDoc); // pointer changes here return TRUE; } BOOL CMyDoc::OnSaveDocument(LPCTSTR lpszPathName) { //if (!CDocument::OnSaveDocument(lpszPathName)) // Old MFC serialize code // return FALSE; std::ofstream ofs(lpszPathName); boost::archive::xml_oarchive oa(ofs); oa << boost::serialization::make_nvp("MyDoc",this); return TRUE; } Saving a document works fine. The problem is that loading a document doesn't work. The boost library seems to copy the CMyDoc object because the pointer comes back a different address. This means that the loaded file isn't loaded into the current document. Can a CDoc overwrite itself with boost? It can with MFC CArchive. If I overload the CMyView to capture the file open and save events, the MRU list management offered by the Doc/View architecture won't happen. I'm sure this has been done a million times, but I can't find any information online. Weird! Any help much appreciated. Thanks, Colin

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using crypto++ with boost::wserialization
by Sean Farrow 04 Jul '11

04 Jul '11

Hi: I'm in the process of needing to encrypt a stream that I'm serializing to. Given that I'm using boost::wserialization to serialize classes, what is the best way of going about this, writing two separate streams to do the job, or writing stream filters? Fyi I'm planning on using Crypto++ has anybody already got streams/stream buffers that use this library? If I can use both approaches, what are the differences? I need to make the code as easy to read as possible. Any help appreciated. Cheers Sean.

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Boost.Python to-Python converter for class T already registered
by Tyler Weston 04 Jul '11

04 Jul '11

Hi All, I'm integrating a Boost.Python module into a Django project. I'm getting spammed with warnings for duplicate conversion methods. Django uses a multi-process model that loads separate copies of the python module into memory. The module does fine with multiprocess initialization. The warnings occur when, somehow, Django calls __init__ a second time on my module, within the same process. The warnings look like: C:\work\svn\sw\branches\python\imager\__init__.py:1: RuntimeWarning: to-Python converter for class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > already registered; second conversion method ignored. I have a few questions about this, as I am new to python. I thought that modules were supposed to be process-global. How do i enforce this and prevent __init__ from being called twice? Are the warnings benign? Should I be concerned about the state of my library static globals (ie is the compiled code going through a second initialization process)?

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Re: [Boost-users] [chrono] Can not build with intel-win
by Edward Rankin 04 Jul '11

04 Jul '11

Message: 1 > Date: Sat, 2 Jul 2011 15:39:41 -0700 (PDT) > From: Vicente Botet <vicente.botet(a)wanadoo.fr> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] [chrono] Can not build with intel-win > Message-ID: <1309646381376-3641235.post(a)n4.nabble.com> > Content-Type: text/plain; charset=UTF-8 > > > Edward Rankin wrote: > > > >> > Message du 13/06/11 09:12 > >> > De : "Bo Jensen" > >> > A : boost-users <at> lists.boost.org > >> > Copie ? : > >> > Objet : [Boost-users] [chrono] Can not build with intel-win > >> > > >> > Newest intel C++ release and vs2010, can not build with chrono from > >> trunk. > >> > > >> > I get : > >> > > >> > pnet.cpp > >> > ..\..\..\external\boost\boost/chrono/duration.hpp(94): error: expected > >> > an expression > >> > && (boost::is_convertible ^ > >> > > >> > ..\..\..\external\boost\boost/chrono/duration.hpp(124): error: > >> > expected an expression > >> > && (boost::is_convertible ^ > >> > > >> > compilation aborted for ..\network\pnet.cpp (code 2) > >> > > >> > call "C:\Program Files > >> > (x86)\Intel\ComposerXE-2011\bin\intel64//iclvars.bat" > nul > >> > icl @"bin\intel-win\release\threading-multi\pnet.obj.rsp" > >> > > >> > Any suggestions welcome. > >> > >> Hi, > >> > >> I have no idea of what could be the cause of the error. > >> > >> Please could you try adding the namespace boost to common_type and send > >> me the preprocesed output. > >> > >> Thanks, > >> Vicente > >> > >> > > Hi, > > > > I tried adding the namespace boost to common_type on L93,L95,L123 and > L125 > > but the exact same error appears. Any other ideas? > > > > > > Hi, > > It seems that this compiler version doesn't likes the default bool template > initialization with &&. > > Could you try if naming the parameter change something? > If not could you try to move the default initialization of bool at the > template instantiation (line 110)? > > Hoping this time is better, > Vicente > > -- > View this message in context: > http://boost.2283326.n4.nabble.com/Re-chrono-Can-not-build-with-intel-win-t… > Sent from the Boost - Users mailing list archive at Nabble.com. > > Assuming I did it correctly, neither suggestion worked (exact same error message). It does look like Intel doesn't support the && when used in a template initialization. Are you able to propose any other workaround? I will see if I can come up with a simple case where Visual Studio works but Intel doesn't work so that I can post it on Intel Premier support, but a fix for this will take months to appear in a release. Regards, Edward

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[graph] Having multiple BFS visitors
by Maxime van Noppen 04 Jul '11

04 Jul '11

Hi, I'm trying to have multiple visitors in the BFS algorithm, thus mixing two examples provided by the doc: http://www.boost.org/doc/libs/1_46_1/libs/graph/example/bfs-example.cpp and http://www.boost.org/doc/libs/1_46_1/libs/graph/doc/bfs_visitor.html What I have: ---------------------------------------------------------------------- #include <boost/graph/adjacency_list.hpp> #include <boost/graph/breadth_first_search.hpp> #include <iostream> enum { r, s, t, u, v, w, x, y, N }; const char *name = "rstuvwxy"; using namespace boost; class discover_visitor : public default_bfs_visitor { public: template < typename Vertex, typename Graph > void discover_vertex(Vertex u, const Graph & g) const { std::cout << "discover: " << name[u] << std::endl; } }; int main() { typedef adjacency_list < vecS, vecS, undirectedS > graph_t; graph_t g; boost::add_vertex(g); boost::add_vertex(g); boost::add_vertex(g); boost::add_vertex(g); boost::add_vertex(g); boost::add_edge(r, s, g); boost::add_edge(s, u, g); boost::add_edge(t, v, g); std::vector<double> dist(N); discover_visitor vis; breadth_first_search(g, vertex(s, g), boost::visitor( make_bfs_visitor( std::make_pair(record_distances(&dist[0], on_tree_edge()), vis) ) ) ); return EXIT_SUCCESS; } ---------------------------------------------------------------------- This produces a lot of g++ errors such as: > /usr/include/boost/graph/breadth_first_search.hpp:311:5: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, const boost::bgl_named_params<P, T, R>&) [with VertexListGraph = boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS>, P = boost::bfs_visitor<std::pair<boost::distance_recorder<double*, boost::on_tree_edge>, discover_visitor> >, T = boost::graph_visitor_t, R = boost::no_property, typename boost::graph_traits<Graph>::vertex_descriptor = long unsigned int]’ > bfs.cc:49:24: instantiated from here > /usr/include/boost/graph/visitors.hpp:138:44: error: no type named ‘event_filter’ in ‘class discover_visitor’ > /usr/include/boost/graph/visitors.hpp:139:51: error: no type named ‘event_filter’ in ‘class discover_visitor’ The problem seems to come from the 2nd pair argument 'vis'. It compiles if I repeat the first argument of the pair two times, ie: std::make_pair(record_distances(&dist[0], on_tree_edge()), record_distances(&dist[0], on_tree_edge())) I tried to define an 'event_filter' in my visitor class: typedef on_discover_vertex event_filter; But then I get other g++ errors: > /usr/include/boost/graph/visitors.hpp:109:8: error: no match for call to ‘(discover_visitor) (long unsigned int&, const boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS>&)’ Is it possible to have self-defined visitors in an EventVisitorList? And if so, how? I'm using boost 1.46.1 with g++ 4.6. Thanks! -- Maxime

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[interprocess] Is that possible that a desktop application open a message queue that a windows service create?
by 陈涛 04 Jul '11

04 Jul '11

I get the exception message "access denied"(interprocess_exception) when openning a message queue that a windows service created in a desktop application, the error code is "security error". Is that possible that a desktop application open a message queue that a service create? If not, I would drop the use of the message queue in my application.

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building and installing boost_log/1.0 on windows
by Shah, Gaurav N 04 Jul '11

04 Jul '11

Hi, I have downloaded boost_log/1.0 from svn. But I do not see any library files. I have never compiled boost libraries earlied. Can some one please guide me to build boost_log? Thank You, Gaurav This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to European legal entities.

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