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Re boost::bind
by Martin Fisher 28 Nov '07

28 Nov '07

I'm trying to use boost::bind - and I'm probably doing something very obviously wrong, but code blindness has set in. A simple example: I have class X { public: void t(int a, int b) { cout << a * b << endl; } }; then in main... vector<int> v; // filled with some ints for_each(v.begin(), v.end(), boost::bind(&X::t, _1, 4)); // or _1, 4 But this doesn't compile - using Borland Turbo C++ (or Visual C++) Elsewhere in my code I use for_each(istream_iterator<string>(f), istream_iterator<string>(), boost::bind(Inserter<T>(), boost::ref(m), _1)); Which works just fine... I'm sure it's something strikingly obvious - but as far as I can see I'm doing much the same as in the docs ? Thanks for any comments. Martin

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vs2005, intel10.1, autolinking libs
by Hicham Mouline 28 Nov '07

28 Nov '07

Hi, I built a 64bit release version of Boost.Test with intel10.1 64bit compiler. bjam -with-test -toolset=intel stage release I moved the 64bit libs to c:\program files\boost\lib which I set in LIB env var, and set in Tools/Options/VC++directories/x64/Libraries in VS. #including boost test headers works correcty. Compilation works but linking (xilink) fails because of undefined symbols which are in libboost_unit_test_framework-iw-mt-s.lib I compile my project with /MT. Adding verbose to the linker, the list of libraries being searched doesn't include any boost lib. 0. Autolinking is not working? (I'm sure it worked once with date_time where I didn't specify the lib at all and it looked for it by itself) 1. If I explicitly add libboost_unit_test_framework-iw-mt-s.lib in Project Properties/Linker/Input/Additional Dependencies, linking fails as it doesn't find the .lib, even though the LIB env var + VS tools/options are set to include c:\program files\boost\lib 2. If I add c:\program files\boost\lib explicitly to Project Properties/Linker/General/Additional Library Directories, then all works. I'd prefer not to include in the project properties the dependencies on boost, but have it as a system-wide setting (LIB or VS/Tools/Options) 3. there is a warning that the compiler version is unknown, run the configure script. Should I look in Boost.Build doc? Rds,

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boost and intel compiler (ICPC).
by Yann Golanski 28 Nov '07

28 Nov '07

Did anyone run any benchmarks on boost compiled with icpc, the Intel compiler? -- yann(a)kierun.org -= H+ =- www.kierun.org PGP: 009D 7287 C4A7 FD4F 1680 06E4 F751 7006 9DE2 6318

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Re: [Boost-users] Serialization using BOOST_CLASS_EXPORT_GUID
by Pavlo Korzhyk 28 Nov '07

28 Nov '07

When class is XXX_EXPORT-ed the code is generated for each included archive header. This is explained somewhere in the docs, probably near BOOST_CLASS_EXPORT macro description. So to avoid XML-related code generation don't #include unneeded archives Sincerely, Pavlo Korzhyk. I'm not sure what "implicit generation of XML-Archive code" refers to. > > Code is generated only for those archive classes actually used. > > RObert Ramey > > "Oliver Kania" <kania.oliver(a)googlemail.com> wrote in message > news:1262c4ee0711270804o50863f90l98f47fa7b2597005@mail.gmail.com... > Hello ! > when using BOOST_CLASS_EXPORT_GUID, is there an option > to disable implicit generation of XML-Archive code. > I have quite a lot of serialization going on and want to save myself > some headaches connected to XML archives. >

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64 bit platforms
by Phil Hystad 28 Nov '07

28 Nov '07

Are the boost libraries supported on any 64 bit platforms? In particular: Win64 and RedHat Linux 64. thanks, phil phystad(a)mac.com

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for_each, mem_fun, bind1st with boost::ptr_vector?
by Robert Dailey 27 Nov '07

27 Nov '07

Hi, I can't figure out how to use std::mem_fun() and std::bind1st() with std::for_each() to call into a member function for each element in a boost::ptr_vector object. Some sample code below: class Object { public: void Tick( float number ) {} }; boost::ptr_vector<Object> m_objects; using namespace std; for_each( m_objects.begin(), m_objects.end(), bind1st( mem_fun( &Object::Tick ), 5 ) ); Of course, this doesn't compile at all. Can anyone tell me what I'm doing wrong?

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boost with embedded compiler / in embedded area
by Bernhard Merkle 27 Nov '07

27 Nov '07

Hi, I have the following questions about using boost with embedded compilers / in the embedded area 1. what about embedded c++ compiler support in boost ? I saw on [1] some compilers but my list e.g. is - Metrowerks Codewarrior for PPC (v 8.x unfortunately) but the 9.x seems also to have problems - GreenHills C++ (seems to have the EDG parser, so no problem) - ARM C++ an they are not officially supported. Has anyone tried them or others ? experiences ? AFAIK, boost has some requirements to C++ compilers (especially templates) 2. what parts of boost are you using in your (embedded) area ? What parts would you avoid and what is recommendable ? (e.g. statechart, thread, the whole collection/algorithm things) Any performance/size issues ? TIA and kind regads, Berni [1] http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/summar… <http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/summar…>

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conditional declaration of template class members
by Hicham Mouline 27 Nov '07

27 Nov '07

hi, Is it possible to define some member functions conditionally on integral template argument values? template <int n> class C { void f1(); void f2(); .... void f6(); // should be a member only if n==3 for e.g. }; I could specialize this template and then i would have to define f1..5() for both the general case and the special case(n==3). rds,

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Serialization using BOOST_CLASS_EXPORT_GUID without XML
by Oliver Kania 27 Nov '07

27 Nov '07

Hello ! when using BOOST_CLASS_EXPORT_GUID, is there an option to disable implicit generation of XML-Archive code. I have quite a lot of serialization going on and want to save myself some headaches connected to XML archives. regards, Oliver

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Problem with graphml
by abhishek.v＠tcs.com 27 Nov '07

27 Nov '07

Hi I making use of graphml.cpp and graphml.hpp but when trying to compile i m getting the linking error following are my error message :- g++.exe -D__DEBUG__ -c main.cpp -o main.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/graphml" -I"C:/SRLGrp/BoostLib/expat-2.0.1/lib" -I"C:/SRLGrp/BoostLib/boost_1_34_1" -I"C:/SRLGrp/BoostLib/expat-2.0.1" -pg -g3 g++.exe -D__DEBUG__ -c ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp -o ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/graphml" -I"C:/BoostLib/expat-2.0.1/lib" -I"C:/BoostLib/boost_1_34_1" -I"C:/BoostLib/expat-2.0.1" -pg -g3 g++.exe -D__DEBUG__ main.o ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o -o "graphml.exe" -L"C:/Dev-Cpp/lib" -lgmon -pg -g3 ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x73): In function `ZN5boost22undirected_graph_errorD0Ev': C:/BoostLib/boost_1_34_1/boost/graph/graphviz.hpp: undefined reference to `XML_ParserCreateNS' ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x91):C:/BoostLib/boost_1_34_1/boost/graph/graphviz.hpp: undefined reference to `XML_SetElementHandler' ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0xa4):C:/BoostLib/boost_1_34_1/boost/graph/graphviz.hpp: undefined reference to `XML_SetCharacterDataHandler' ../../SRLGrp/BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0xb6):C:/BoostLib/boost_1_34_1/boost/graph/graphviz.hpp: undefined reference to `XML_SetUserData' ../../SRLGrp/BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x12b): In function `ZN5boost12read_graphmlERSiRNS_12mutate_graphE': C:/Dev-Cpp/graphml/../../BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp:349: undefined reference to `XML_Parse' ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x1af):C:/Dev-Cpp/graphml/../..BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp:351: undefined reference to `XML_GetCurrentColumnNumber' ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x1c0):C:/Dev-Cpp/graphml/../../BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp:351: undefined reference to `XML_GetCurrentLineNumber' ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x1d1):C:/Dev-Cpp/graphml/../../BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp:351: undefined reference to `XML_GetErrorCode' ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x1d9):C:/Dev-Cpp/graphml/../../BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp:351: undefined reference to `XML_ErrorString' ../../SRLGrp/BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x259): In function `Z41__static_initialization_and_destruction_0ii': C:/Dev-Cpp/include/c++/3.4.2/iostream:77: undefined reference to `XML_ParserFree' ../../BoostLib/boost_1_34_1/libs/graph/src/graphml.o(.text$_ZN14graphml_reader3runERSi[graphml_reader::run(std::basic_istream<char, std::char_traits<char> >&)]+0x3c9): In function `GLOBAL__D__ZN5boost12read_graphmlERSiRNS_12mutate_graphE': C:/Dev-Cpp/graphml/../../BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp:355: undefined reference to `XML_ParserFree' collect2: ld returned 1 exit status Thanks Abhishek =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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Problem with graphml
by abhishek.v＠tcs.com 27 Nov '07

27 Nov '07

Hi Currently working on graphml reader so found a thread on http://article.gmane.org/gmane.comp.lib.boost.devel/146836 but when trying to access the attached file it is giving me error page stating "you are not authorized to view this page" Can i find the reader_test.cpp code on some other link so that i don't have to write the code again. Also i have downloaded graphml.cpp and graphml.hpp but when trying to compile the code it's giving me compilation error "C:/boost_1_34_1/libs/graph/src/graphml.cpp:22: error: expected `}' at end of input" in graphml.cpp file on the code "graphml_reader(mutate_graph& g):m_g(g), m_canonical_vertices(false) { }" What could be the reason for this.. Thanks Abhishek Vyas =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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Regarding lock-free data structure implementation in boost libraries
by Rakesh Sinha 27 Nov '07

27 Nov '07

Hi - I was just curious about some kind of lock-free data structure implementation (CAS algorithms specifically for Linux/GCC platform ) present in the boost library. After searching through the archives - I came across a Read-Writable lock that was later recalled. Can someone help me with some current status / point me to an appropriate API regarding the same. Thanks for the help.

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Using boost::function and boost::bind
by A Arabadji 26 Nov '07

26 Nov '07

Hello people! I am a new boost user, and I am trying to implement a console for a game, which binds console commands to functions. These functions can come from different objects and this is why I decided to try using boost. I am using Visual Studio 8.0 SP1. I have something like this: //all functions are of generic structure //the return nothing and they take a vector of arguments typedef boost::function1< void, std::vector<std::string>& > funcHolder; //I also have a hash table, which holds function references and the //relative commands: std::map<std::string, funcHolder> commands; //Finally I have a function: void Console::addCommand(const String &command, funcHolder f) { std::map<String, funcHolder>::iterator t = commands.find(command); if(t == commands.end()) commands.insert( make_pair(command, f) ); else commands[command] = f; } All of these things are members of a Console class. So once I added these, I tried adding this line to the constructor: addCommand("clear", boost::bind(&Console::clear, this); //clear method void Console::clear( vector<std::string>& args ) { lines.clear(); } During compilation I get C4180 warnings. I have heard that those are due to VS8.0 SP1 compiler bugs, so I ignore them but then I get a following error: Project : error PRJ0002 : Error result 1 returned from 'C:\Program Files\Microsoft Visual Studio 8\VC\bin\cl.exe'. Compiler basically crashes. Any ideas what might be wrong? I thank everyone in advance, Artyom

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[Boost.Serialization] code works with gcc 4.1.2 but does not compile with gcc 3.3.3
by Christoph 26 Nov '07

26 Nov '07

I have written code to serialize a class hierarchy (with lots of shared_ptrs, strings, vectors etc.). This compiles (and works) on gcc 4.1.2 (OpenSuse 10.3). When trying to compile it on an older machine (gcc 3.3.3) I am getting lots of compiler errors which seem to boil down to the issue the the (de)serialization code fails to instantiate some abstract class in the hierarchy. I understand that instantiating these classes has to fail, what I do not understand is why the same code compiles with gcc 4.1.2... any ideas? What I did was: I have defined the following typedefs/macros typedef boost::archive::binary_iarchive InArchive; typedef boost::archive::binary_oarchive OutArchive; #define DECLARE_AS_SERIALIZABLE \ friend class boost::serialization::access; \ void serialize(InArchive & ar, const unsigned int file_version); \ void serialize(OutArchive & ar, const unsigned int file_version) and have augmented each and every class in the hierarchy with the line DECLARE_AS_SERIALIZABLE /* inside the class */ BOOST_SERIALIZATION_SHARED_PTR(Node); /* after the class decl. */ in the .cpp file I have BOOST_CLASS_EXPORT_GUID(mepl::Node, "Node") // for each class and the implementation of the serialize methods void Node::serialize(InArchive & ar, const unsigned int /* file_version */){ ar & BOOST_SERIALIZATION_NVP(m_sFileName) //& BOOST_SERIALIZATION_NVP(m_sSource) // & BOOST_SERIALIZATION_NVP(m_parentNode) & BOOST_SERIALIZATION_NVP(m_iStartLine) & BOOST_SERIALIZATION_NVP(m_iStartColumn) & BOOST_SERIALIZATION_NVP(m_iEndLine) & BOOST_SERIALIZATION_NVP(m_iEndColumn); } void ExprNode::serialize(InArchive & ar, const unsigned int /* file_version */){ ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Node); bool bConst; ar & BOOST_SERIALIZATION_NVP(m_type) & BOOST_SERIALIZATION_NVP(bConst) & BOOST_SERIALIZATION_NVP(m_wert); m_bIsConst=bConst; } etc. As I've said, this works beautifully with gcc 4.1.2. Have I made a mistake here? Or is the older compiler not suppored in by Boost.Serialization? Small part of the compiler's output //melos/prog/boost/include/boost-1_34_1/boost/serialization/access.hpp: In static member function `static void boost::serialization::access::construct(Archive&, T*) [with Archive = boost::archive::binary_iarchive, T = mepl::Node]': //melos/prog/boost/include/boost-1_34_1/boost/serialization/serialization.hpp:105: instantiated from `void boost::serialization::load_construct_data(Archive&, T*, unsigned int) [with Archive = boost::archive::binary_iarchive, T = mepl::Node]' //melos/prog/boost/include/boost-1_34_1/boost/serialization/serialization.hpp:170: instantiated from `void boost::serialization::load_construct_data_adl(Archive&, T*, unsigned int) [with Archive = boost::archive::binary_iarchive, T = mepl::Node]' //melos/prog/boost/include/boost-1_34_1/boost/archive/detail/iserializer.hpp:308: instantiated from `void boost::archive::detail::pointer_iserializer<T, Archive>::load_object_ptr(boost::archive::detail::basic_iarchive&, void*&, unsigned int) const [with T = mepl::Node, Archive = boost::archive::binary_iarchive]' /usr/include/g++/bits/locale_facets.h:214: instantiated from here //melos/prog/boost/include/boost-1_34_1/boost/serialization/access.hpp:123: error: cannot allocate an object of type `mepl::Node' //melos/prog/boost/include/boost-1_34_1/boost/serialization/access.hpp:123: error: because the following virtual functions are abstract: node.hpp:59: error: virtual void mepl::Node::streamout(std::ostream&) const Thank you, and best regards Christoph

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[Serialization] Need help with wide character i/o
by Mahesh Venkitachalam 26 Nov '07

26 Nov '07

Hello, I am looking for some help in following instructions to create a wide character archive that I found from the boost serialization documentation: Actually the reason I am on this path is because my code is crashing if I try to do this in a normal way. (please see my previous post [Serialization] Strange crash with binary_iarchive) > > > To produce wide character text output (i.e. 16 bit characters on Win32 systems), do the following. > > Open a wide character stream. > Alter the stream locale to use boost::archive::codecvt_null<OStream::char_type> > Create the archive with the flag no_codecvt. Naturally, the input process has to be symmetrical. > My attempt (below) crashed when the archive is read back - what am I doing wrong? std::wofstream bofs("gps.bin", std::ios::binary); std::locale loc(bofs.getloc(), new boost::archive::codecvt_null<wchar_t>()); bofs.imbue(loc); // create class instance const gps_position g2(36, 60, 24.567f); boost::archive::binary_woarchive oa(bofs, boost::archive::no_codecvt); oa << g2; bofs.close(); cout << "reading archive..." << endl; gps_position newg; // create and open an archive for input std::wifstream ifs("gps.bin", std::ios::binary); std::locale loc2(ifs.getloc(), new boost::archive::codecvt_null<wchar_t>()); ifs.imbue(loc2); // CRASHES NEXT LINE boost::archive::binary_wiarchive ia(ifs, boost::archive::no_codecvt); // read class state from archive ia >> newg; The serialized class is below: #include <string> #include <vector> #include <fstream> #include <boost/archive/binary_oarchive.hpp> #include <boost/archive/binary_woarchive.hpp> #include <boost/archive/binary_iarchive.hpp> #include <boost/archive/binary_wiarchive.hpp> #include <boost/serialization/base_object.hpp> #include <boost/archive/codecvt_null.hpp> using namespace std; class gps_position { private: friend class boost::serialization::access; // When the class Archive corresponds to an output archive, the // & operator is defined similar to <<. Likewise, when the class Archive // is a type of input archive the & operator is defined similar to >>. template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & degrees; ar & minutes; ar & seconds; } int degrees; int minutes; float seconds; double* data; public: gps_position(){}; gps_position(int d, int m, float s) : degrees(d), minutes(m), seconds(s) {} }; Thanks Mahesh

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Re : extract url with boost::regex
by hallouina-ml＠yahoo.fr 26 Nov '07

26 Nov '07

No, I don't see this example, I was reading the documentation and example about regex iterator and not regex token iterator. I search on other website but don't find this example. I will study it. Thanks John for always anwsering, and always fast answering. I was completly discouraged. Thanks again! ----- Message d'origine ---- De : John Maddock <john(a)johnmaddock.co.uk> À : boost-users(a)lists.boost.org Envoyé le : Lundi, 26 Novembre 2007, 17h50mn 31s Objet : Re: [Boost-users] extract url with boost::regex hallouina-ml(a)yahoo.fr wrote: > Hello; > > I try to extract an url from a webpage and it's almostly done but > completly unoptimised : > > Before I try with a regex iterator. But I don't understand the > documentation. :-( Did you see this example:http://www.boost.org/libs/regex/example/snippets/regex_token_iterat… It does exactly what you want - it exacts all the URL's from a HTML file. > boost::regex rexp(".*(http:\\/\\/.+)\"*.*"); > > > and I get this result : > > http://www.nolife-tv.com/" > http://www.nolife-tv.com"> > http://www.nolife-tv.com/images/stories/noiz/1.jpg" > http://www.nolife-tv.com/component/option,com_poll/task,results/id,16/Itemi…';" > http://www.joomla.org" > http://www.google-analytics.com/urchin.js" > http://www.omniture.com > > and so on... > > I will cut and get only the url without the " or ' > why this regex get the " with it? I put the close bracket before the > " so why? I already try to do \\" rather than \" Because the .* on the end of the expression will match whatever text follows the ", the grouping construct (...) spits out a *sub-expression* which you can access via the match_results::operator[] or match_results::str(i) methods. HTH, John. [...] _____________________________________________________________________________ Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail

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extract url with boost::regex
by hallouina-ml＠yahoo.fr 26 Nov '07

26 Nov '07

Hello; I try to extract an url from a webpage and it's almostly done but completly unoptimised : Before I try with a regex iterator. But I don't understand the documentation. I past to many time on this way, so I try an other way : I get my webpage with libcurl then I replace all " " by a "\n" like that : string::size_type i = 0; while (( i = page_a_analyser.find(' ', i ) ) != (string::npos)) { page_a_analyser.replace(i++, 1, "\n" ); } then I apply the regex : boost::regex rexp(".*(http:\\/\\/.+)\"*.*"); and I get this result : http://www.nolife-tv.com/" http://www.nolife-tv.com"> http://www.nolife-tv.com/images/stories/noiz/1.jpg" http://www.nolife-tv.com/component/option,com_poll/task,results/id,16/Itemi…';" http://www.joomla.org" http://www.google-analytics.com/urchin.js" http://www.omniture.com and so on... I will cut and get only the url without the " or ' why this regex get the " with it? I put the close bracket before the " so why? I already try to do \\" rather than \" I try to do (\"|')" too to say " or ', but this doesn't work too... So I do an other way : I get my webpage with libcurl then I replace all " " by a "\n" then replace all " by \n then replace all ' by \n then I apply the regex And I should replace with 3 while rather than only one... because the 3 conditions in one while wasn't working : while ( (( i = page_a_analyser.find(' ', i ) ) != (string::npos)) or ( i = page_a_analyser.find('"', i ) ) != (string::npos) or ( i = page_a_analyser.find('\'', i ) ) != (string::npos) ) So how can I do to just improve the regex to extract the url? to do just something like : replace " " by "\n" then apply the right regex. I don't want to use a regex iterator again. regex iterator win again my patience... 3 day on it is enough for me. Thanks for your attention _____________________________________________________________________________ Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail

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Decoding hex strings
by Stefan Arentz 26 Nov '07

26 Nov '07

Is there something in Boost that can help me decode hex strings into binary form? For example hexadecimal strings that contain MD5 hashes. S.

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[boost] [serialization] New Primitive Types
by Andy Tompkins 26 Nov '07

26 Nov '07

Hi, If I create a new class, my_class, am I allowed to mark it as follows: BOOST_CLASS_IMPLEMENTATION ( my_class , boost::serialization::primitive_type ) The comments in level.hpp say that it won't call serialization code, thus I believe (and experience) that I don't need to provide either: template<class Archive> void my_class::serialize(Archive &ar, const unsigned int version) or template<class Archive> void serialize(Archive &ar, my_class &t, const unsigned int version) The comments also say that 'It presumes a member function or template in the archive class that can handle this type.' Does this mean that current archives (text, xml, and binary) are not able to use new primitive types without altering the archive to handle the new primitive? As I try it, both the text and xml archives use stream operators to convert my_class to a string and archive that. The binary archive casts my_class to a void* and outputs sizeof(my_class) bytes to the archive. It this expected behavior? Thanks, Andy.

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Problem in using graphml.cpp..
by abhishek.v＠tcs.com 26 Nov '07

26 Nov '07

Hi I m trying to extract a graph by reading out graphml. For this purpose i'm making using of graphml.cpp and graphml.hpp also i have included "expat" libraries required for this. But when i'm trying to compile this it gives the following error :- Executing make... make.exe -f "C:\Dev-Cpp\graphml\Makefile.win" all g++.exe -D__DEBUG__ -c ../../boost_1_34_1/libs/graph/src/graphml.cpp -o ../../SRLGrp/BoostLib/boost_1_34_1/libs/graph/src/graphml.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/graphml" -I"C:/SRLGrp/BoostLib/expat-2.0.1/lib" -I"C:/SRLGrp/BoostLib/boost_1_34_1" -I"C:/SRLGrp/BoostLib/expat-2.0.1" -pg -g3 In file included from ../../SRLGrp/BoostLib/boost_1_34_1/libs/graph/src/graphml.cpp:14: C:/SRLGrp/BoostLib/boost_1_34_1/boost\graph\graphml.hpp: In function `void boost::write_graphml(std::ostream&, const Graph&, VertexIndexMap, const boost::dynamic_properties&, bool)': C:/boost_1_34_1/boost\graph\graphml.hpp:259: error: missing terminating " character C:/boost_1_34_1/boost\graph\graphml.hpp:260: error: `xmlns' undeclared (first use this function) C:/boost_1_34_1/boost\graph\graphml.hpp:260: error: (Each undeclared identifier is reported only once for each function it appears in.) C:/boost_1_34_1/boost\graph\graphml.hpp:260: error: expected `;' before ':' token C:/boost_1_34_1/boost\graph\graphml.hpp:260: error: stray '\' in program C:/boost_1_34_1/boost\graph\graphml.hpp:260: error: missing terminating " character C:/boost_1_34_1/boost\graph\graphml.hpp:261: error: stray '\' in program C:/boost_1_34_1/boost\graph\graphml.hpp:261: error: missing terminating " character C:/boost_1_34_1/boost\graph\graphml.hpp:288: error: `value_types' undeclared (first use this function) C:/boost_1_34_1/boost\graph\graphml.hpp:288: error: template argument 1 is invalid C:/boost_1_34_1/boost\graph\graphml.hpp:289: error: template argument 1 is invalid C:/boost_1_34_1/boost\graph\graphml.hpp:289: error: template argument 1 is invalid C:/boost_1_34_1/boost\graph\graphml.hpp:289: error: no matching function for call to `for_each(<type error>)' In file included from ../../boost_1_34_1/libs/graph/src/graphml.cpp:14: C:/boost_1_34_1/boost\graph\graphml.hpp:369:34: warning: no newline at end of file What could be the reason for this. Right now i m only trying to compile the code avaliable on boost website. Thanks Abhishek Vyas ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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Threads
by Rij 26 Nov '07

26 Nov '07

Hello, I am having problems with running a threads program and was windering if someone could help. I have the following 3 files. 1) example.h class example{ public: example(); virtual ~example(); void operator()(); void someOtherFn(); }; 2) example.cc #include "example.h" C_example::C_example() { } C_example::~C_example() { } void C_example::operator()() { cout << "I'm thread\n"; } 3) main.cc #include <boost/thread/thread.hpp> #include "example.h" int main(int argc, char* argv[]) { example e; boost::thread t1(e); t1.join(); return 0; } I have compiled this and linked with: -lboost_thread-gcc-mt When I run it, I get the following error: terminate called after throwing an instance of 'boost::thread_resource_error' what(): boost::thread_resource_error Abort (core dumped) Any help please?

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[boost-users] assigning pointer of vector.
by chun ping wang 26 Nov '07

26 Nov '07

Hi, since ptr_vector are non copyable, how would i got baout making assignment from one ptr_vector to another.. i.e. ptr_vector<Foo> t; ptr_vector<Foo> t2; // some coding. t = t2;

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[Serialization] Strange crash with binary_iarchive
by Mahesh Venkitachalam 26 Nov '07

26 Nov '07

Hello, I am getting a crash in my application when reading from a binary archive created using boost serialization. From a small test application, with identical code, I can read this archive fine. But when I put the same code into into my main application, I get the crash shown in the stack below. Since I am not getting a crash for a simple test application, I am unable to provide a simple code example to the crash. I would appreciate any hints on why this can happen. As far as I understand, the compiler options are the same. Could this be due to a difference in MS RT libs linked to? Any debugging ideas welcome. I am using Visual Studio 8, and the application uses wxWidgets and OpenGL. Thanks Mahesh > msvcr80d.dll!memcpy(unsigned char * dst=0xcdcdcdcd, unsigned char * src=0x0012fb78, unsigned long count=1) Line 350 Asm msvcr80d.dll!memcpy_s(void * dst=0xcdcdcdcd, unsigned int sizeInBytes=3452816845, const void * src=0x0012fb78, unsigned int count=1) Line 67 + 0x11 bytes C msvcp80d.dll!std::char_traits<char>::_Copy_s(char * _First1=0xcdcdcdcd, unsigned int _Size_in_bytes=3452816845, const char * _First2=0x0012fb78, unsigned int _Count=1) Line 575 + 0x16 bytes C++ msvcp80d.dll!std::_Traits_helper::copy_s<std::char_traits<char> >(char * _First1=0xcdcdcdcd, unsigned int _Size=3452816845, const char * _First2=0x0012fb78, unsigned int _Count=1, std::_Secure_char_traits_tag __formal={...}) Line 707 + 0x15 bytes C++ msvcp80d.dll!std::_Traits_helper::copy_s<std::char_traits<char> >(char * _First1=0xcdcdcdcd, unsigned int _Size=3452816845, const char * _First2=0x0012fb78, unsigned int _Count=1) Line 699 + 0x21 bytes C++ msvcp80d.dll!std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<char> >::assign(const std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<char> > & _Right="*", unsigned int _Roff=0, unsigned int _Count=4294967295) Line 1021 + 0x25 bytes C++ msvcp80d.dll!std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<char> >::assign(const std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<char> > & _Right="*") Line 1006 C++ msvcp80d.dll!std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<char> >::operator=(const std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<char> > & _Right="*") Line 888 C++ msvcp80d.dll!std::_DebugHeapString::operator=(const std::_DebugHeapString & __that={...}) + 0x13 bytes C++ evviewn.exe!std::locale::locale<boost::archive::codecvt_null<char> >(const std::locale & _Loc={...}, const boost::archive::codecvt_null<char> * _Facptr=0x028c7178) Line 301 + 0x33 bytes C++ evviewn.exe!boost::archive::add_facet<boost::archive::codecvt_null<char> >(const std::locale & l={...}, boost::archive::codecvt_null<char> * f=0x028c7178) Line 46 + 0x2a bytes C++ evviewn.exe!boost::archive::basic_binary_iprimitive<boost::archive::binary_iarchive,char,std::char_traits<char> >::basic_binary_iprimitive<boost::archive::binary_iarchive,char,std::char_traits<char> >(std::basic_streambuf<char,std::char_traits<char> > & sb={...}, bool no_codecvt=false) Line 146 + 0x48 bytes C++ evviewn.exe!boost::archive::binary_iarchive_impl<boost::archive::binary_iarchive,char,std::char_traits<char> >::binary_iarchive_impl<boost::archive::binary_iarchive,char,std::char_traits<char> >(std::basic_istream<char,std::char_traits<char> > & is={...}, unsigned int flags=0) Line 79 + 0x4d bytes C++ evviewn.exe!boost::archive::binary_iarchive::binary_iarchive(std::basic_istream<char,std::char_traits<char> > & is={...}, unsigned int flags=0) Line 40 + 0x17 bytes C++ evviewn.exe!File4dv::read(const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & filename="test.4dv") Line 53 + 0x11 bytes C++

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Is anyone going to tell me the way to set the WINDOWS variables for BOOST?
by question boost 26 Nov '07

26 Nov '07

Hi, in order to build boost I do: cd BOOST_ROOT/tools/jam/src then , bjam --toolset mingw stage and I get the following error: argument error rule boost-build (dir?) called with: (C:/Documents and settings/src/boost/tools/build/v2) extra argument and jambase.c:35:see the definition of rule 'boost-build' being called Is anyone going to tell me what goes wrong? THANK YOU VERY MUCH, David _________________________________________________________________ Votez pour vos séries TV préférées et tentez de gagner un voyage à Hawaï ! http://messengerawards.divertissements.fr.msn.com/

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vertex structure
by bayer.tomas＠upcmail.cz 24 Nov '07

24 Nov '07

Hello, I have the problem with the vertex structure definition. I don´t know, how to create graph with variable vertices count without vertices renaming. Source graph: (n=5 vertices) Edges { E(130, 27), E(1, 83), E(1, 204), E(27, 1), E(27, 130), E(83, 204), E(204, 130)}; To find minimal spannig tree using Prim leeds to vertices renaming <0,n-1>. Renamed graph: Edges { E(0, 2), E(1, 3), E(1, 4), E(2, 1), E(2, 0), E(3, 4), E(4, 0)}. But it is very uncomfortable. How could I use original vertices number in graph definition? Thanks Tomas My source code: #include <boost/config.hpp> #include <boost/utility.hpp> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/prim_minimum_spanning_tree.hpp> #include <boost/graph/subgraph.hpp> typedef boost::adjacency_list_traits< boost::vecS, boost::vecS, boost::undirectedS >::vertex_descriptor vertex_descriptor; typedef boost::property<boost::vertex_color_t, boost::default_color_type, boost::property< boost::vertex_predecessor_t, vertex_descriptor > > VertexProperty; typedef boost::property<boost::edge_color_t, boost::default_color_type, boost::property<boost::edge_weight_t, int, boost::property<boost::edge_index_t, int > > > EdgeProperty; typedef boost::subgraph< boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS, VertexProperty, EdgeProperty > > Graph; typedef boost::graph_traits < Graph >::edge_descriptor Edge; int main(void) { int num=5; Graph g(num); boost::property_map<Graph, boost::edge_weight_t>::type weightmap = boost::get(boost::edge_weight, g); Edge e; bool inserted; //Here I would like to use original vertices numbers boost::tie(e, inserted) = boost::add_edge(0, 2, g); weightmap[e] = 1; boost::tie(e, inserted) = boost::add_edge(1, 3, g); weightmap[e] = 1; boost::tie(e, inserted) = boost::add_edge(1, 4, g); weightmap[e] = 1; boost::tie(e, inserted) = boost::add_edge(2, 1, g); weightmap[e] = 1; boost::tie(e, inserted) = boost::add_edge(2, 0, g); weightmap[e] = 1; boost::tie(e, inserted) = boost::add_edge(3, 4, g); weightmap[e] = 1; boost::tie(e, inserted) = boost::add_edge(4, 0, g); weightmap[e] = 1; std::vector < boost::graph_traits < Graph >::vertex_descriptor > p(num_vertices(g)); boost::prim_minimum_spanning_tree(g, &p[0]); for (std::size_t i = 0; i != p.size(); ++i) if (p[i] != i) std::cout << "parent[" << i << "] = " << p[i] << std::endl; else std::cout << "parent[" << i << "] = no parent" << std::endl; }

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