January 2007 - Boost-users - lists.preview.boost.org

[spirit][phoenix] calling stack::pop
by Jeffrey Holle 21 Jan '07

21 Jan '07

I'm writing a parser using spirit 1.84. I'd like use phoenix to call a method of an attribute in my definition class. Within my definition class I have: typedef stack<int> Parents; Parents parents_; I've attempted to call the pop method of this container using: [phoenix::bind(&definition::Parents::pop)] I get an error saying that an undefined reference to pop was made. If I change the syntax to: [phoenix::bind(&definition::Parents::pop)()] The error messages are much worst. Is there a way to do such a thing using phoenix?

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Directory size (via boost::filesystem) problem
by Daniel Wyatt 21 Jan '07

21 Jan '07

Okay so i just wrote this quick program to test boost::filesystem's features out. It's supposed to find the size of a directory (the sum of the size of the files in it) and optionally recurse all subdirectories: #include <cstdio> #include <cstdlib> #include <iostream> #include <sstream> #include <boost/filesystem/operations.hpp> using namespace std; using namespace boost::filesystem; void Usage(char *Path) { printf("Usage: %s <Directory> [-r]\n", Path); exit(EXIT_FAILURE); } unsigned long DirSize(const string Directory, bool Recurse = false) { long Size = 0; directory_iterator itDir; directory_iterator itEnd; path Path; Path = Directory; itDir = directory_iterator(Path); for (; itDir != itEnd; itDir++) { if (is_directory(*itDir)) { if (Recurse) Size += DirSize(itDir->string(), true); continue; } Size += file_size(*itDir); } return Size; } string UnitString(unsigned long Bytes) { const char *Units[] = {"bytes", "KiB", "MiB", "GiB", "TiB", "PiB"}; const unsigned int UnitsMax = 6; double Size = (double)Bytes; unsigned int i = 0; stringstream ss; for (i = 0; i < UnitsMax && Size >= 1024.0; i++) Size /= 1024.0; ss.precision(2); ss << fixed << Size; ss << " " << Units[i]; return ss.str(); } int main(int argc, char *argv[]) { bool Recurse = false; if (argc != 2 && argc != 3) Usage(argv[0]); if (argc == 3) Recurse = true; if (argc == 3 && stricmp(argv[2], "-r") != 0) Usage(argv[0]); if (!exists(argv[1])) { printf("Directory '%s' does not exist\n\n", argv[1]); Usage(argv[0]); } if (!is_directory(argv[1])) { printf("'%s' is not a directory\n\n", argv[1]); Usage(argv[0]); } printf("Size of directory '%s': %s\n", argv[1], UnitString(DirSize(argv[1], Recurse)).c_str()); return EXIT_SUCCESS; } Its not too pretty but ignore that please. It works for the most part. It gives perfect results for nearly all directories. One exception i've noticed on my system is "C:\Program Files". It gives me "419.15 MiB" but it should be giving me something more like "8.40 GiB". I figure an unsigned long is large enough, isn't it? Do i need to use an unsigned long long or is there something else wrong here??? Thanks, Daniel Wyatt

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Re: [Boost-users] BoostCon 2007 Program Committee progress report
by Moshe Matitya 21 Jan '07

21 Jan '07

Moshe Matitya wrote: > > Beman Dawes wrote: > > > > The conference dates (May 14-16) are firm, and other > arrangements are > > moving forward. See http://www.boost.org/more/BoostCon07.html > > That page says that the conference dates are May 14-18. Can we nail down the conference dates? Beman's message from last week says that the dates are May 14-16, but the web site continues to say that they're May 14-18. It this a three-day or a five-day conference? Moshe

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[Fusion] fusion::traits::is_sequence <-> mpl::is_sequence?
by Sohail Somani 21 Jan '07

21 Jan '07

Hi, If I am trying to make a fusion sequence mpl compatible, do I need to specialize mpl::is_sequence as well? I had expected that the following should be true: BOOST_MPL_ASSERT(( fusion::traits::is_sequence<myseq> )); BOOST_MPL_ASSERT(( mpl::is_sequence<myseq> )); But the compilation fails on the second line. I've also defined begin using the fusion extension mechanism for this sequence. Thanks! Sohail

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[fusion][mpl] Get type from fusion sequence using mpl::at_c
by Chris Weed 21 Jan '07

21 Jan '07

Hi, I am trying to get the type of the first element in a fusion vector using mpl::at_c. This seems simple enough. // Here is the code #include <boost/fusion/sequence/container/vector.hpp> #include <boost/mpl/at.hpp> int main() { typedef boost::fusion::vector<int,int> VectorType; typedef boost::mpl::at_c<VectorType,0>::type value0; return 0; } This won't compile on vc-8.0, and I get the following error message: ...patience... ...found 467 targets... ...updating 2 targets... msvc.compile.c++ bin\msvc-8.0\debug\example2.obj example2.cpp using native typeof boost\boost/mpl/begin_end.hpp(35) : error C2903: 'apply' : symbol is neither a class template nor a function template boost\boost/mpl/aux_/at_impl.hpp(33) : see reference to class template instantiation 'boost::mpl::begin<Sequence>' being compiled with [ Sequence=VectorType ] boost\boost/mpl/at.hpp(45) : see reference to class template instantiation 'boost::mpl::at_impl<Tag>::apply<Sequence,N>' being compiled with [ Tag=boost::fusion::fusion_sequence_tag, Sequence=VectorType, N=boost::mpl::long_<0> ] examples\example2.cpp(11) : see reference to class template instantiation 'boost::mpl::at_c<Sequence,N>' being compiled with [ Sequence=VectorType, N=0 ] boost\boost/mpl/begin_end.hpp(35) : error C2027: use of undefined type 'boost::mpl::begin_impl<boost::fusion::fusion_sequence_tag>' boost\boost/mpl/begin_end.hpp(35) : error C2059: syntax error : '<' boost\boost/mpl/begin_end.hpp(35) : error C2039: 'type' : is not a member of '`global namespace'' boost\boost/mpl/begin_end.hpp(35) : error C2238: unexpected token(s) preceding ';' boost\boost/mpl/aux_/at_impl.hpp(33) : error C2039: 'type' : is not a member of 'boost::mpl::begin<Sequence>' with [ Sequence=VectorType ] boost\boost/mpl/aux_/at_impl.hpp(34) : error C2146: syntax error : missing ',' before identifier 'type' boost\boost/mpl/aux_/at_impl.hpp(34) : error C2065: 'type' : undeclared identifier boost\boost/mpl/aux_/at_impl.hpp(35) : error C2955: 'boost::mpl::advance' : use of class template requires template argument list boost\boost/mpl/advance.hpp(60) : see declaration of 'boost::mpl::advance' boost\boost/mpl/aux_/at_impl.hpp(35) : error C2039: 'type' : is not a member of 'boost::mpl::advance' boost\boost/mpl/advance.hpp(60) : see declaration of 'boost::mpl::advance' boost\boost/mpl/aux_/at_impl.hpp(35) : error C2146: syntax error : missing ';' before identifier 'iter_' boost\boost/mpl/aux_/at_impl.hpp(35) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int boost\boost/mpl/aux_/at_impl.hpp(35) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int boost\boost/mpl/aux_/at_impl.hpp(37) : error C2065: 'iter_' : undeclared identifier boost\boost/mpl/aux_/at_impl.hpp(37) : error C2955: 'boost::mpl::deref' : use of class template requires template argument list boost\boost/mpl/deref.hpp(35) : see declaration of 'boost::mpl::deref' boost\boost/mpl/aux_/at_impl.hpp(37) : error C2371: 'boost::mpl::at_impl<Tag>::apply<Sequence,N>::type' : redefinition; different basic types with [ Tag=boost::fusion::fusion_sequence_tag, Sequence=VectorType, N=boost::mpl::long_<0> ] boost\boost/mpl/aux_/at_impl.hpp(35) : see declaration of 'boost::mpl::at_impl<Tag>::apply<Sequence,N>::type' with [ Tag=boost::fusion::fusion_sequence_tag, Sequence=VectorType, N=boost::mpl::long_<0> ] call "C:\Program Files\Microsoft Visual Studio 8\VC\vcvarsall.bat" x86 >nul cl /Zm800 -nologo -TP /Z7 /Od /Ob0 /W3 /GR /MDd /Zc:forScope /Zc:wchar_t /wd4675 /EHs @"bin\msvc-8.0\debug\example2.obj.rsp" -c -Fo"bin\msvc-8.0\debug\example2.obj" ...failed msvc.compile.c++ bin\msvc-8.0\debug\example2.obj... ...skipped <pbin\msvc-8.0\debug>example2.exe for lack of <pbin\msvc-8.0\debug>example2.obj... ...failed updating 1 target... ...skipped 1 target...

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Newbie question conerning interprocess stuff
by Wolfgang Hottgenroth 20 Jan '07

20 Jan '07

Hi, I'm a complete newbie with boost and have a question concerning the interprocess stuff. I took the piece of code to share a vector in shared memory between two processes from the quick-start guide as a start point and it compiled and ran immediately with success for me. Then I tried to replace the vector by a map: #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/containers/map.hpp> #include <boost/interprocess/allocators/allocator.hpp> using namespace std; int main () { boost::interprocess::shared_memory_object::remove("MySharedMemory"); boost::interprocess::managed_shared_memory segment(boost::interprocess::create_only, "MySharedMemory" ,65536); //segment size in bytes typedef pair<const int, int> MyPair; typedef boost::interprocess::allocator<MyPair, boost::interprocess::managed_shared_memory::segment_manager> ShmemAllocator; typedef boost::interprocess::map<int, int, less<int>, ShmemAllocator> MyMap; const ShmemAllocator alloc_inst (segment.get_segment_manager()); MyMap *mymap = segment.construct<MyMap>("MyMap")(alloc_inst); // mymap->insert(make_pair(1,10)); // mymap->insert(make_pair(2,20)); // mymap->insert(make_pair(3,30)); // mymap->insert(make_pair(4,40)); // mymap->insert(make_pair(5,50)); return 0; } and I wasn't able to compile it any more. (I've put the error message and the sources on the web, find it here: http://www.hottis.de/boost/) I think it is the segment.construct line, although I don't find a direct hint in the error message from the compiler, but if I comment out this line, the compiler is happy. Has any one any hint for me? Thank you very much, Wolfgang

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[statechart] - delay of handlinmg a specific event?
by Oliver.Kowalke＠qimonda.com 20 Jan '07

20 Jan '07

Hello, Is it possible to delay the handling of an event? If I've three states X, Y and Z; initial state is X. State Y is entered if X receives event y1. State Z is entered if X receives event z1. X is entered if Y receives event y2. Y is entered if Z receives event z2. If Y is entered then it executes a function which will generate event y2 during ist processing (function will be executed in another thread - thread passes event y2 to state machine). It is possible that event z1 is passed to the state machine before event y2. How can I delay processing of event z1 until y2 event handling has taken place? Regards, Oliver

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Easy linking question
by Mark Wyszomierski 19 Jan '07

19 Jan '07

Hi, I compiled for visual studio 2005 (vc8). In my boost lib folder I have a serialization library named: libboost_serialization-vc80-mt-gd-1_33_1.lib everything was working fine until I changed my code generation runtime library from: Multi-threaded Debug DLL (/MDd) to: Multi-threaded Debug (/MTd) Now when I compile I get a linking error saying my app cannot find the lib called: libboost_serialization-vc80-mt-sgd-1_33_1.lib (there is an 's' before the 'gd' which is the difference). I don't have this lib anywhere in my boost folder. What happened! Thanks, Mark

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boost::apply_visitor(const& visitor, ...) - why const?
by cdr＠encapsule.com 19 Jan '07

19 Jan '07

Hello, Why does boost::apply_visitor take a const reference to the visitor object? This forces me to write a boost::static_visitor-derived visitor that looks like this: class my_visitor_t : public boost::static_visitor<> { template <typename T> void operator()(T const& t) const { // do something ... } }; ... when what I would really like to do is something like this: class my_visitor_t : public boost::static_visitor<> { my_visitor(my_data & _data) : data(_data) {} void operator()(int const& i) // NOT const { // data.blah.blah = // blah } template <typename T> void operator()(T const& t) // NOT const { // data.foo() } my_data & data }; So I might have several different instances of a given a my_variant_t: my_variant_t v1; my_variant_t v2; my_variant_t v3; my_data_t my_data; my_visitor_t my_visitor(my_data); boost::apply_visitor(my_visitor, v1); boost::apply_visitor(my_visitor, v2); // and so on... ... BUT, the fact that I must make the visitor operator() const makes this impossible and is inconsistent with the way that I'm used to leveraging visitors in the BGL. Would someone be kind enough to comment on the rationale behind this? What am I missing here? - Thanks Chris

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crash on test_no_rtti
by Miguel Silvestre 19 Jan '07

19 Jan '07

Hi! I'm tryingto compile and test the test_no_rtti for deriving pointers of derived classes. I'm getting a crash in the file dbgheap.c line 266 when the boost tries to do this: return dynamic_cast<T>(u); on file smart_cast.hpp line 76. I'm using VC-80 compiler. In the attach I send the file (a little bit modified, since I'm looking for this to compile :S). Any sugestion please???? -- Miguel Silvestre

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Re: [Boost-users] [date_time] timezone rules for different years
by Stephen Turner 19 Jan '07

19 Jan '07

On 2007-01-10 at 15:12:18 GMT, Jeff Garland wrote: > > Personally, I don't have a > use for this or time to implement it myself, but if you are motivated I'm > willing to help you through the process and add into the library when it is > complete. > Jeff, I'm sorry, but I don't think I'm going to have time to work on this. I was keen, but my boss has decided that our users don't care that much about being an hour out six months ago. He's probably right too... -- Stephen Turner, Cambridge, UK http://homepage.ntlworld.com/adelie/stephen/ "The internet is a reflection of our society. If we do not like what we see, the problem is not to fix the mirror, we have to fix society." (Vint Cerf)

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[Graph] Multithreading slowdown on dual core Pentium D
by Brian Townley 19 Jan '07

19 Jan '07

I am experiencing a problem with multithreading using the boost graph library on a dual core Pentium D platform. If I attempt to calculate average path length of a graph, I get at least a 2x slowdown using multiple threads when using johnson_all_pairs_shortest_path. Calculating betweenness is even worse (~7x) when I use brandes_betweenness_centrality and relative_betweenness_centrality. In my test setup, I have no locks anywhere and no shared memory (the graphs are loaded from a file for each iteration in the test). The graph has been defined similar to the following (I can't get actual code on the list due to restrictions from employer): struct VertexProperties { string name; string group; vector<string> properties; }; struct EdgeProperties { string name; double weight; }; typedef boost::property<...> GraphProperty //a group of enums mapped to doubles and ints typedef boost::adjacency_list<listS, vecS, undirectedS, VertexProperties, EdgeProperties, GraphProperty> BoostGraph; All I have to do in my code to see the slowdown is to use a populated graph with johnson_all_pairs_shortest_path in some iterative loop in both one and multiple threads. A real kicker is that currently I can get around this problem by spawning multiple processes to deal with the data load (so I have an interim solution at least) and that gives me a performance improvement by 2x which I expect with dual core... However, I really want to know why this isn't working in a multi-threaded environment. What could I be doing wrong? Is there some proprocessor #define that makes the boost graph library more thread independent? Is there something wrong with the way that I am declaring the graph? Any help is appreciated! Thanks, Thranil

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[filesystem] code pages support
by Игорь Микушкин 19 Jan '07

19 Jan '07

Hi ! namespace fs = boost :: filesystem; boost :: intmax_t filesize = fs :: file_size (argv [1]); This causes an exception if the name consists of cyrillic symbols. (Windows XP, MinGW). Does boost :: filesystem support these names. --------------------------------- Вы уже с Yahoo!? Испытайте обновленную и улучшенную Yahoo! Почту!

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cancel a pending cregex_iterator matching
by Winson Yung 19 Jan '07

19 Jan '07

Hello, I am using the following pesudo code to do a regex match on big buffer (25K of text), sometimes it takes a little longer to come back with a result. I know this partly because the way my regular expression pattern is structured, but I am just wondering whether boost::regex has a mechanism to cancel the pending matching like this one. regex expr(const char* key, regex_constants::perl | regex_constants::icase); cregex_iterator m1(pBuf, pBuf + scope, expr), m2; if (m1 != m2) { // A match found } else { // No match found }

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Serialization and shared_ptr<const X>
by Anders Wang Kristensen 19 Jan '07

19 Jan '07

Hi, I sometimes use shared_ptr<const X> to share read-only resources between different classes. However serializing shared_ptr<const X> causes problems as shown in the attached code. Saving is no problem, but loading fails to compile with an error about converting from const to non-const. I managed to make it compile and run by splitting serialize into load/save. Save is as before, but in load I deserialize into a shared_ptr<X> (no const) and just assign that to the const version. Is this the preferred way? It seems like a hack since I'm saving as one type and loading as another, albeit closely related, type. Thanks. -- Anders #include <boost/serialization/shared_ptr.hpp> #include <boost/serialization/split_member.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <fstream> class B { public: int x; friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(x); } }; class A { public: boost::shared_ptr<const B> bar; friend class boost::serialization::access; //This doesn't work.. template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(bar); } /* //This works.. template<class Archive> void load(Archive & ar, const unsigned int version) { boost::shared_ptr<B> tmp; ar & BOOST_SERIALIZATION_NVP(tmp); bar = tmp; } template<class Archive> void save(Archive & ar, const unsigned int version) const { ar & BOOST_SERIALIZATION_NVP(bar); } BOOST_SERIALIZATION_SPLIT_MEMBER() */ }; int main(int argc, const char* argv[]) { { boost::shared_ptr<B> b(new B); b->x = 17; A a = { b }; std::ofstream ofs("test.xml"); boost::archive::xml_oarchive oa(ofs); oa << BOOST_SERIALIZATION_NVP(a); } { A a; std::ifstream ifs("test.xml"); boost::archive::xml_iarchive ia(ifs); ia >> BOOST_SERIALIZATION_NVP(a); } }

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Re: [Boost-users] [bjam] Building boost libraries for Win32withalldebugging info
by Nat Goodspeed 18 Jan '07

18 Jan '07

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Lawrence Spector > Sent: Thursday, January 18, 2007 11:54 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] [bjam] Building boost libraries for > Win32withalldebugging info > > We do use the serialization library. What are the caveats to having > 'wchar_t as built-in' off? [Nat] I remembered seeing something about it not working with MSVC 7.1. For some reason I can't find it in the Web archives, but my own Inbox has that message from last November. Turns out it was from YOU, but I didn't realize that when I saw your message earlier today. This is what I was remembering: -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Lawrence Spector Sent: Thursday, November 30, 2006 3:50 PM To: Lawrence Spector; boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] Linker Errors Using Unicode (Was: error C2027: use of undefined type 'boost::serialization::extended_type_info_null<T>'?) Ok, I was playing with the compiler settings and figured it out. Apparently, in order to use this, you *must* have wchar_t treated as a built-in type setting on in VC7.1. Ah ha. Maybe there's a good spot to document that. Thanks for the assistance, Lawrence

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Re: [Boost-users] Deriving Serialization classes
by Pfligersdorffer, Christian 18 Jan '07

18 Jan '07

Hi Miguel, you can find what you seek in the documentation under Reference, Serializable Concept, Pointers, Pointers to Objects of Derived Classes. Two possibilities: * eiter call ar.register_class<A>() * or use the macro BOOST_CLASS_EXPORT(A) Have fun, Christian Pfligersdorffer Software Engineering EOS GmbH > -----Ursprüngliche Nachricht----- > Von: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org]Im Auftrag von Miguel > Silvestre > Gesendet: Montag, 15. Januar 2007 16:30 > An: boost-users(a)lists.boost.org > Betreff: Re: [Boost-users] Deriving Serialization classes > > > Anyone??? > > In the boost code I found this comment: > > // note:if this exception is thrown, be sure that derived pointer > // is either regsitered or exported. > > How can I register a class???????? > > On 1/15/07, Miguel Silvestre <msilvestre(a)gmail.com> wrote: > > Just make the test without a pointer ant it works just fine. > > > > I've looked at the documentation and it only refers to this > problem on > > derivated classes! But I'm not deriving any class. I'm just > including > > the ponter of a class :( > > > > On 1/15/07, Miguel Silvestre <msilvestre(a)gmail.com> wrote: > > > Ok!!! > > > > > > Now I'm getting unregistered_class exceptions when trying > to seryalize > > > a class that has another class. Like: > > > > > > class C : public Serializer > > > { > > > typedef Serializer Parent; > > > public: > > > std::string text; > > > A* m_owner; > > > int32 dasse; > > > C():m_owner(0) > > > { > > > text = "Ola sua puta rabeta!"; > > > dasse = 69; > > > } > > > > > > void Serialize(IArchive& ar, const unsigned int version) > > > { > > > ar.Serialize(dasse); > > > ar.Serialize(text); > > > //ar.Serialize(m_owner); > > > } > > > }; > > > > > > class A : public Serializer > > > { > > > typedef Serializer Parent; > > > public: > > > > > > void Serialize(IArchive& ar, const unsigned int version) > > > { > > > ar.Serialize(dumbi); > > > ar.Serialize(vectorTest); > > > ar.Serialize(matrix); > > > ar.Serialize(testing); > > > ar.Serialize((void*)test_void, sizeof(Vector3f)); > > > } > > > > > > int dumbi; > > > float dumbf; > > > Vector2f vectorTest; > > > Matrix33 matrix; > > > C* testing; > > > Vector3f* test_void; > > > > > > A():dumbi(12), dumbf(69.69f) > > > { > > > testing = new C(); > > > testing->m_owner = this; > > > matrix.SetIdentity(); > > > test_void = new Vector3f(1,2,3); > > > } > > > > > > A(int dumb1, float dumb2) : dumbi(dumb1), dumbf(dumb2) > > > { > > > testing = new C(); > > > testing->m_owner = this; > > > matrix.SetIdentity(); > > > test_void = new Vector3f(1,2,3); > > > } > > > }; > > > > > > If I comment the line that serializes C object from A > > > (ar.Serialize(testing);) everything works fine. > > > I can serialize Object A. And I can serialiaze the Object > C to. But > > > when I have apoibter to C on object A It throws the > unregistered_class > > > exception? > > > > > > Why? > > > > > > How can I avoid this??? > > > On 1/12/07, Robert Ramey <ramey(a)rrsd.com> wrote: > > > > Use binary_object. > > > > > > > > Robert Ramey > > > > > > > > > > > > > > > > _______________________________________________ > > > > Boost-users mailing list > > > > Boost-users(a)lists.boost.org > > > > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > > > > > > > > > > > > -- > > > Miguel Silvestre > > > > > > > > > -- > > Miguel Silvestre > > > > > -- > Miguel Silvestre > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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[Boost.Serialization] Memory management for references
by sadrok 18 Jan '07

18 Jan '07

Hi, I'm loading a class that requires a reference passed to the constructor. The implementation requires loading data into a pointer as explained in the docs. How is the memory for the loaded object handled? Does it automatically get freed when the object goes out of scope? Thanks -- sadrok(a)gmail.com Yahoo! IM: sadrok_za Jabber ID: sadrok(a)jabber.obsidian.co.za

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Re: [Boost-users] [bjam] Building boost libraries for Win32 with alldebugging info
by Nat Goodspeed 18 Jan '07

18 Jan '07

________________________________________ From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Lawrence Spector Sent: Thursday, January 18, 2007 11:44 AM To: boost-users(a)lists.boost.org Subject: [Boost-users] [bjam] Building boost libraries for Win32 with alldebugging info I had built the boost libraries a while ago, using bjam. It looks like all the boost debug libraries were built with Debug Information Format of "C7 Compatible (/Z7)" instead of "Program Database for Edit and Continue (/ZI)" and I'd like to rebuild the libraries with this option turned on. In addition, we're going to need "Treat wchar_t as a built-in type" turned off. It defaults to on. [Nat] We don't use bjam, so I'll let others address your real question. But do you intend to use the Serialization library? If so, beware of turning off 'wchar_t as built-in'.

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[bjam] Building boost libraries for Win32 with all debugging info
by Lawrence Spector 18 Jan '07

18 Jan '07

I had built the boost libraries a while ago, using bjam. It looks like all the boost debug libraries were built with Debug Information Format of "C7 Compatible (/Z7)" instead of "Program Database for Edit and Continue (/ZI)" and I'd like to rebuild the libraries with this option turned on. In addition, we're going to need "Treat wchar_t as a built-in type" turned off. It defaults to on. Any help that can be given in setting the bjam to build correctly for our situation would be much appreciated. Thanks in advance, Lawrence

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Using regex
by tintin 18 Jan '07

18 Jan '07

I've tried using the regex library in msvc, but keep getting unresolved external errors.. I have; #define BOOST_REGEX_NO_LIB #include <boost/regex.hpp> using namespace boost; Whenever I do a: regex e(".*test.*"); I keep getting a: 1>test.obj : error LNK2019: unresolved external symbol "private: class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > & __thiscall boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::do_assign(char const *,char const *,unsigned int)" (?do_assign@?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@boost@@AAEAAV12@PBD0I@Z) referenced in function "public: class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > & __thiscall boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::assign(char const *,char const *,unsigned int)" (?assign@?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@boost@@QAEAAV12@PBD0I@Z) Yeah I know it's long, but that's the msvc error ;) Any ideas why it won't work?

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How can we serialize pointer of type base abstract class pointing to Derived concrete class
by Piyush Kapadia 18 Jan '07

18 Jan '07

We have a situation where there is BaseAbstract class and Derived concrete class. Interface requires that we pass BaseAbstractClassPointer, using which user can provide any of Derived Concrete class pointer and Interface remain generic to them. However serializing BaseAbstractPointer is throwing following error - *A unregistered class* How do we handle this situation ? #include <iostream> #include <fstream> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/binary_iarchive.hpp> #include <boost/archive/binary_oarchive.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/map.hpp> #include <vector> #include <map> #include <boost/archive/archive_exception.hpp> #include <boost/archive/basic_xml_archive.hpp> class BaseAbstract { public : virtual void setRate(double rate) = 0; virtual double getRate(int) = 0; }; class DerivedConcrete : public BaseAbstract { std::vector<double> rateVec; friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(rateVec); } public: DerivedConcrete(double rate) {rateVec.push_back(rate);} DerivedConcrete(){} virtual ~DerivedConcrete(){} void setRate(double rate){ rateVec.push_back(rate); }; double getRate(int idx){ return rateVec[idx]; }; }; class AnyClass { friend class boost::serialization::access; BaseAbstract* rate; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(rate); } public: AnyClass(BaseAbstract* rateInput){ rate = rateInput; }; AnyClass() {}; setRate(BaseAbstract* rateInput){ rate = rateInput; }; }; int main(int argc, char* argv[]) { try { DerivedConcrete* fr = new DerivedConcrete(12.12); fr->setRate(14.5); AnyClass ac; ac.setRate(fr); std::ofstream ofs("AC.xml"); assert(ofs.good()); boost::archive::xml_oarchive oa(ofs); oa << BOOST_SERIALIZATION_NVP(ac); ofs.close(); } catch (boost::archive::xml_archive_exception ex) { std::cerr << " X " << ex.what() << std::endl; } catch (boost::archive::archive_exception ex) { std::cerr << " A " << ex.what() << std::endl; } catch (std::exception ex) { std::cerr << " E " << ex.what() << std::endl; } catch (...) { std::cerr << "Unknown Exception " << std::endl; } return 0; }

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GNU Cross compiler problem under cygwin
by Norbert Unterberg 18 Jan '07

18 Jan '07

I have a cross compiler problem. We are running a cross compiler toolchain under Cygwin/Windows. This toolchain uses a cuistomized gcc compiler to generate code for a linux target. When trying to build boost using this cross compiler, bjam still detects that it is running on cygwin and windows, and tries to build DLLs instead of linux shared libraries. Is there any chance to configure bjam to run under windows or cygwin but generate code for a different target, either by special command line options or even by compiling a custom version of bjam? I have looked into jam some time ago but had to drop it because it was unable to differentiate between host and target configuration (like running under a windows host but generate code for Linux). Seem I am faling into the same trap again... Any help is appreciated! Norbert Unterberg

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[Boost.dynamic_bitset bug]: operators <<= and >>= interchanged?
by Martin Moene 18 Jan '07

18 Jan '07

boost_1_33_1 Dear all, I suspect that the shift operator of the dynamic_bitset are reversed. Best regards, Martin Moene ___ C:\>dynamic_bitset.exe x :11111 x <<= 1:01111 x >>= 2:11100 /* * dynamic_bitset bug: operator <<= and >>= interchanged. * * cl -GX -ID:/Libraries/boost_1_33_1/ dynamic_bitset.cpp * cl -GX -IC:/Libraries/boost_1_33_1/ dynamic_bitset.cpp * cl -GX -I%BOOST% dynamic_bitset.cpp */ #include <iostream> #include <boost/dynamic_bitset.hpp> std::ostream& operator<<( std::ostream& os, boost::dynamic_bitset<> const& bs ) { for ( boost::dynamic_bitset<>::size_type i = 0; i < bs.size(); ++i ) { os << bs[i]; } return os; } int main( int, char*[] ) { boost::dynamic_bitset<> x(5); // all 0's by default x.set(); std::cout << "x :" << x << std::endl; std::cout << "x <<= 1:" << ( x <<= 1 ) << std::endl; std::cout << "x >>= 2:" << ( x >>= 2 ) << std::endl; return EXIT_FAILURE; }

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[fusion] vector documentation
by Chris Weed 18 Jan '07

18 Jan '07

Hi, This example <http://spirit.sourceforge.net/dl_more/fusion_v2/libs/fusion/doc/html/fusion…> has the following include #include <boost/fusion/sequence/container/vector/vector_forward.hpp> which appears to now be vector/vector_fwd.hpp in CVS. Am I using outdated docs, outdated code, or is it not consistent? Thanks, Chris

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