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Boost 1.34.1 + MinGW + STLport5-dll
by Johannes Barop 22 Aug '07

22 Aug '07

Hello, I'm trying to build Boost 1.34.1 with MinGW and STLport5. With no success. I created a user-config.jam in my home directory with following content: <snip> using stlport : 5.1 : "C:\\MinGW\\STLport-5.1.3\\stlport" "C:\\MinGW\\STLport-5.1.3\\lib" ; </snip> Then I tryed to build Boost with the following command line: bjam --toolset=gcc stage stdlib=stlport runtime-link=shared Which gave me a lots of errors. See here: http://nopaste.php-quake.net/2727 Any ideas what might be wrong? Cheers, Johannes

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Subject : [Multi-index] -- using a hashed unique index that is not part of the hashed value
by Oliver Kania 22 Aug '07

22 Aug '07

Hello, what I basically want to do is using multi-index like a hashmap. I want to use vector<long> as key. However, all the examples I found are using member-fields of the values or the values themselves as key. Is it not possible to use multi-index like a hash_map<value,key> where the key is independent of the value type ? If yes, could someone please provide an example ? regards, Oliver

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Re: [Boost-users] boost bind beginner throw problem
by Taglioretti Roberto 22 Aug '07

22 Aug '07

From: "Peter Dimov" > The following program works for me with VC 7.1. > #include <boost/bind.hpp> > struct Error {}; > struct X { void test( int i ) throw( Error ) {}}; > int main() > { > X obj; > boost::bind( &X::test, obj, _1 ); >} I try to compile your example, theese are the error messages on my VC 7.1: C:\sviluppo\r2\boost\build\1.34.1\include\boost\lambda\detail\bind_functions.hpp(544): error C2553: no legal conversion of return value to return type 'type' "const boost::lambda::lambda_functor<T>" with [ T=boost::lambda::lambda_functor_base<boost::lambda::action<4,boost::lambda::function_action<4>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<void (__thiscall SVLCompiler::Analysis::* const )(SVLCompiler::Analysis::Iteratorp_t,SVLCompiler::Analysis::Iteratorp_t)>::type,const boost::lambda::detail::bind_traits<SVLCompiler::Analysis *const >::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_type>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder2_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>> ] C:\sviluppo\r2\boost\build\1.34.1\include\boost\lambda\detail\bind_functions.hpp(544): error C2664: "boost::lambda::lambda_functor<T>::lambda_functor(const boost::lambda::lambda_functor<T> &)": impossibile convertire il parametro 1 da "boost::lambda::lambda_functor_base<Act,Args>" a "const boost::lambda::lambda_functor<T> &" with [ T=boost::lambda::lambda_functor_base<boost::lambda::action<4,boost::lambda::function_action<4>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<void (__thiscall SVLCompiler::Analysis::* const )(SVLCompiler::Analysis::Iteratorp_t,SVLCompiler::Analysis::Iteratorp_t)>::type,const boost::lambda::detail::bind_traits<SVLCompiler::Analysis *const >::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_type>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder2_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>> ] and [ Act=boost::lambda::action<4,boost::lambda::function_action<4>>, Args=boost::tuples::tuple<const boost::lambda::detail::bind_traits<void (__thiscall SVLCompiler::Analysis::* const )(SVLCompiler::Analysis::Iteratorp_t,SVLCompiler::Analysis::Iteratorp_t) throw(SVLCompiler::Analysis::Error_check)>::type,const boost::lambda::detail::bind_traits<SVLCompiler::Analysis *const >::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_type>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder2_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type, I hope you can help me :-( -- Roberto Taglioretti *sono affetto da discromatopsia, per favore evitate l'invio di mail o allegati colorati* *I have dyschromatopsia, please do not send coloured text or email and attach* Aderite al progetto SETI: http://setiweb.ssl.berkeley.edu/team_display.php?teamid=30233

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boost::spirit
by Christer Borgqvist 22 Aug '07

22 Aug '07

Hello Boost Experts I'm using the BDS 2006 and trying to use the spirit library like this #include <boost/spirit.hpp> in my function string hex="0x1F"; unsigned int value; parse( hex.c_str() , hex_p[assign_a(value)] ); // i get following compiler error [C++ Error] closures.hpp(238): E2299 Cannot generate template specialization from 'impl::closure_frame_holder<FrameT>' thanks for any help //Christer

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Bug in shared_array
by Hansi Hansi 22 Aug '07

22 Aug '07

Hello, I think I have found an bug in the shared_array implementation in version 1.34.1 for VC8.0. I hope that this is the right location to post this and that one fixes this file. I think that the implementation needs this: #elif defined( _MANAGED ) static void unspecified_bool( this_type*** ) { } typedef void (*unspecified_bool_type)( this_type*** ); operator unspecified_bool_type() const // never throws { return px == 0? 0: unspecified_bool; } it is the same implementation as used in shared_ptr. If I don't have this I get during the call a buffer overrun. Best regards Hansjörg __________________________________________________________________________ Erweitern Sie FreeMail zu einem noch leistungsstärkeren E-Mail-Postfach! Mehr Infos unter http://produkte.web.de/club/?mc=021131

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Re: [Boost-users] Serialization newbie needs help
by Dominick Layfield 21 Aug '07

21 Aug '07

"Robert Ramey" <ramey(a)rrsd.com> wrote: > Actually, I've considered reviewing all the email in this list and > summarizing > the results in a section "Hints and Troubleshooting Tips". I think this > is useful and necessary and useful, but I just havent gotten around to it. That sounds ideal. > > But if you could provide me an example of when pointer serialization > > shines, > > then I would say "Aha! Now I understand why Robert went to so much > > trouble to make this work.", and I could be at peace with the world > > again! :-) > > LOL - I haven't had time to make any real apps lately. So... no example at all? My problem is that I just don't see when pointer serialization would be a big win. But I can't tell if I just have a limited perspective. That's why I was genuinely hoping that you could provide a concrete example. Naturally, a system that "just works" no matter what structure is thrown at it sounds very enticing. However, as you have acknowledged, the system is not foolproof, and user gotchas remain. One way to eliminate the gotchas would be to reduce the scope of the library. Clearly, this is unlikely to happen, as (i) you've invested a lot of time and effort getting the pointer magic to work, and (ii) there are probably a lot of applications out there that would break if you did so. I for one would certainly appreciate a simplified version which omitted the pointer magic, and thus removed the const trap and similar issues. If I want to set up pointers within an object, then I can do so manually using the type-specific load()/save() functions. Obviously, I can just switch to a different serialization library (e.g. s11n). But as much as possible, I would like to stick with whatever is most "standard". And as part of the Boost family, I'm guessing that boost::serialization is top dog here. Would that be right? Is this library included in any of the proposed C++ standards (TR2, C++0x)? > > BTW, I don't want to sound like I'm bashing your library, so let me > > end with a compliment. I think the symmetric design of serialize(), > > with the same function used for both input and output, is one of the > > prettiest > > idioms I've seen in years. > > And that's the one thing I didn't do - I believe I "borrowed" it from Jens > Maurer. Hah! Ooops. Well, that compliment backfired! ;-) Let's try again: I *really* appreciate the built-in support for all the STL container classes. So far, these have "just worked" perfectly for me. Nice work! > One tiny point. I'm aware that the "const" trap is annoying. But I've > become > convinced that the annoyance is small compared to the hassles it saves me > and users from. I suspect that those who have a problem with aren't in the > habit of using "const" everywhere they can. It does seem bizarre to have to const-cast an object just so that it can be output. I presume that the majority of objects that are to be serialized are not intrinsically constant, so this needs to be done the majority of the time. And it looks dangerous. What does the const-cast actually mean in this context? I assume it means: "I promise that no other thread is going to modify the object (or anything its pointers point to) while the serialize() operation is pending. Is that correct? If so, then shouldn't it be solved explicitly with concurrent programming primitives (i.e. mutexes or similar)? -- Dominick

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An easy one
by Panayiotis 21 Aug '07

21 Aug '07

Hello, what is the equivalent of: void foo(int array[]) for boost::array? Thanks, Panayiotis

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Can Python "httplib" module be directly embedded in C++ ?
by Raja Cherukuri 21 Aug '07

21 Aug '07

Hello, I am trying to use python to do my XML post ? Can I do this by directly calling import on the httplib like this and setting parameters ? ex: boost::python::object http_module((boost::python::handle<>(boost::python::borrowed(PyImport_Ad dModule("httplib"))))); boost::python::<....some kind of python compile time...interface...> h = < some kind of cast...> http_module.HTTP("http://www.abc.com"); h.putrequest('POST', selector) h.putheader('content-type', content_type) h.putheader('content-length', str(len(body))) h.endheaders() h.send(body) Or should the actual code for this object reside in a text file and I should call exec_file ? Thanks in Advance. - Raja

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[mpl] Is it possible to mpl_assert depending on the derivation of a class
by Hughes, James 21 Aug '07

21 Aug '07

Hello all, I want some template code to assert if the passed in template type is NOT derived from a particular base class. I've looked through the Template Metaprogamming book, but haven't seen anything that can do this, but I seem to remember something along those lines. Can anyone help? James This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.

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serialization lib, demo_shared_ptr.cpp, XML archives
by Robbie Morrison 21 Aug '07

21 Aug '07

Hello all My problem is similar to that discussed by Phil and Robert Ramey on 'Boost - Users' back in 08-Feb-2007. Their thread was titled "serialization stream error". Phil however did not post back a follow up and it remains unclear as to whether his difficulties were resolved or not. Moreover, these discussions predate the 1.34.1 release on 24-Jul-2007 by about five months. For my part, I have tried solving the problem covered in this email using: - Boost 1.33.1 from an Ubuntu package and dated 05-Dec-2005 - Boost 1.34.1 built from source under Ubuntu 6.10 I would like to get 'demo_shared_ptr.cpp' to run using XML rather than text as the archive format -- as a precursor to integrating this kind of code into an energy system simulation. I decided to use a step-by-step approach: step 1 - build and run the original 'demo_shared_ptr.cpp' using the original text archive format - therefore, remove the leading A:: and B:: from constructor and destructor definitions - comment out the following (two places): oa.register_type(static_cast<boost::detail::sp_counted_base_impl > *>(NULL)); [as far as I could tell 'sp_counted_base_impl' no longer exists] step 2 - add NVP statements while retaining the text archive format for the time being - therefore, swap over all archive calls, for instance: // ar & x; ar & boost::serialization::make_nvp("x", x); step 3 - switch to the XML archive format - duly change the following headers: // #include <boost/archive/text_iarchive.hpp> // #include <boost/archive/text_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> - duly change the archive objects: // boost::archive::text_oarchive oa(ofs); boost::archive::xml_oarchive oa(ofs); Step 3 fails but only in the derived pointer code added by David Tonge to 'demo_shared_ptr.cpp'. A 'boost::STATIC_ASSERTION_FAILURE' is generated. Typical error messages are given after the main body of this posting. At this point, I ran out of ideas. I have read the HTML documentation and made my own notes and still can't see a solution. Any assistance would be very gratefully received! Note too that I only log on once per day so don't expect a rapid turn-around for requests for details. In addition, I will send diffs to the maintainer when I get a satisfactory solution. And, in passing, it is material to note that derived class B does not fully archive its state and that there should probably be an "ar & x" statement in its 'serialize' definition. For the record, here is my development environment: os : Ubuntu 6.10, Linux 2.6.17-12-generic hardware : Toshiba Tecra A2 330 laptop (purchased 27-Aug-2004) specs : 1.4GHz Intel Celeron M (32-bit) / 512MiB RAM / 40GB HDD / 1024x76 gcc : gcc (GCC) 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5) I realize that this is not the latest release of Ubuntu, but otherwise my system is fully current. Lastly, I take it Boost.Serialization and TR1 shared pointers (std::tr1::shared_ptr) remain incompatible at this point in development. Many thanks to Robert Ramey for developing Boost.Serialization. It suits my needs to a tee, so I hope I can get this issue resolved and move on with real coding. best wishes Robbie --------------------------------- selected error messages --------------------------------- /usr/local/include/boost-1_34_1/boost/archive/basic_xml_oarchive.hpp: In member function 'void boost::archive::basic_xml_oarchive<Archive>::save_override(T&, int) [with T = const A, Archive = boost::archive::xml_oarchive]': /usr/local/include/boost-1_34_1/boost/archive/detail/interface_oarchive.hpp:79: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = const A, Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/archive/detail/interface_oarchive.hpp:87: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator&(T&) [with T = A, Archive = boost::archive::xml_oarchive]' qdemo_shared_ptr.mod01.cpp:76: instantiated from 'void B::serialize(Archive&, unsigned int) [with Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/serialization/access.hpp:109: instantiated from 'static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/serialization/serialization.hpp:81: instantiated from 'void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/serialization/serialization.hpp:140: instantiated from 'void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:225: instantiated from 'boost::archive::detail::pointer_oserializer<T, Archive>::pointer_oserializer() [with T = B, Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:197: instantiated from 'const boost::archive::detail::pointer_oserializer<B, boost::archive::xml_oarchive> boost::archive::detail::pointer_oserializer<B, boost::archive::xml_oarchive>::instance' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:189: instantiated from 'static const boost::archive::detail::pointer_oserializer<T, Archive>& boost::archive::detail::pointer_oserializer<T, Archive>::instantiate() [with T = B, Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:514: instantiated from 'const boost::archive::detail::basic_pointer_oserializer& boost::archive::detail::instantiate_pointer_oserializer(Archive*, T*) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/archive/detail/interface_oarchive.hpp:59: instantiated from 'const boost::archive::detail::basic_pointer_oserializer* boost::archive::detail::interface_oarchive<Archive>::register_type(const T*) [with T = B, Archive = boost::archive::xml_oarchive]' demo_shared_ptr.mod01.cpp:200: instantiated from here /usr/local/include/boost-1_34_1/boost/archive/basic_xml_oarchive.hpp:83: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' --------------------------------- my modifications --------------------------------- $ diff -u demo_shared_ptr.cpp demo_shared_ptr.mod01.cpp --- demo_shared_ptr.cpp 2007-08-21 11:51:35.000000000 +0200 +++ demo_shared_ptr.mod01.cpp 2007-08-21 14:44:33.000000000 +0200 @@ -9,6 +9,21 @@ // // See http://www.boost.org for updates, documentation, and revision history. +// build : $ g++ -ggdb -Wall demo_shared_ptr.mod01.cpp +// -lboost_serialization-gcc41 -o demo_shared_ptr +// run : $ demo_shared_ptr + +// --------------------------------------------------------- +// PREPROCESSOR DIRECTIVES +// --------------------------------------------------------- + +// 0 = text, 1 = text with NPV statements, 2 = xml +#define XEONA_ARCHIVE_MODE 2 +// 0 = omit DT code, 1 = use DT code +#define DT_CODE 1 + +// --------------------------------------------------------- + #include <iomanip> #include <iostream> #include <fstream> @@ -17,15 +32,23 @@ #include <cstdio> // remove #include <boost/config.hpp> #if defined(BOOST_NO_STDC_NAMESPACE) -namespace std{ +namespace std{ using ::remove; } #endif -#include <boost/archive/text_oarchive.hpp> -#include <boost/archive/text_iarchive.hpp> +#if (XEONA_ARCHIVE_MODE >= 2) +# include <boost/archive/xml_oarchive.hpp> +# include <boost/archive/xml_iarchive.hpp> +#else +# include <boost/archive/text_oarchive.hpp> +# include <boost/archive/text_iarchive.hpp> +#endif + #include <boost/archive/tmpdir.hpp> +//#include <boost/serialization/base_object.hpp> // base class serialization + #include <boost/serialization/shared_ptr.hpp> /////////////////////////// @@ -37,12 +60,18 @@ int x; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ - ar & x; + +#if (XEONA_ARCHIVE_MODE >= 1) + ar & boost::serialization::make_nvp("x", x); +#else + ar & x; +#endif + } public: static int count; - A::A(){++count;} // default constructor - virtual A::~A(){--count;} // default destructor + A(){++count;} // default constructor + virtual ~A(){--count;} // default destructor }; BOOST_SERIALIZATION_SHARED_PTR(A) @@ -56,12 +85,18 @@ int x; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ - ar & boost::serialization::base_object<A>(*this); + +#if (XEONA_ARCHIVE_MODE >= 1) + ar & boost::serialization::base_object<A>(*this); // problem +#else + ar & boost::serialization::base_object<A>(*this); +#endif + } public: static int count; - B::B() : A() {}; - virtual B::~B() {}; + B() : A() {}; + virtual ~B() {}; }; BOOST_SERIALIZATION_SHARED_PTR(B) @@ -83,8 +118,30 @@ int main(int argc, char *argv[]) { + std::cout << std::endl; + std::cout << "xeona archive mode : " + << XEONA_ARCHIVE_MODE + << std::endl; + + std::cout << "DT extension mode : " + << DT_CODE + << std::endl; + +#if (XEONA_ARCHIVE_MODE >= 2) + std::string ext = "xml"; +#else + std::string ext = "txt"; +#endif + std::string filename(boost::archive::tmpdir()); filename += "/testfile"; + filename += "."; + filename += ext; + + std::cout << "testfile : " + << filename + << "\n" + << std::endl; // create a new shared pointer to ta new object of type A boost::shared_ptr<A> spa(new A); @@ -94,9 +151,21 @@ // serialize it { std::ofstream ofs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_oarchive oa(ofs); +#else boost::archive::text_oarchive oa(ofs); +#endif + +#if (XEONA_ARCHIVE_MODE >= 1) + oa << boost::serialization::make_nvp("spa", spa); + oa << boost::serialization::make_nvp("spa1", spa1); +#else oa << spa; oa << spa1; +#endif + } // reset the shared pointer to NULL // thereby destroying the object of type A @@ -108,17 +177,28 @@ { // open the archive std::ifstream ifs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_iarchive ia(ifs); +#else boost::archive::text_iarchive ia(ifs); +#endif - // restore the schedule from the archive +#if (XEONA_ARCHIVE_MODE >= 1) + ia >> boost::serialization::make_nvp("spa", spa); + ia >> boost::serialization::make_nvp("spa1", spa1); +#else ia >> spa; ia >> spa1; +#endif + } display(spa, spa1); spa.reset(); spa1.reset(); - std::cout << std::endl; +#if (DT_CODE >= 1) + std::cout << std::endl; std::cout << "New tests" << std::endl; @@ -131,17 +211,29 @@ // serialize it { std::ofstream ofs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_oarchive oa(ofs); +#else boost::archive::text_oarchive oa(ofs); +#endif oa.register_type(static_cast(NULL)); - oa.register_type( - static_cast< - boost::detail::sp_counted_base_impl< - B *, boost::checked_deleter - > * - >(NULL) - ); +// oa.register_type( +// static_cast< +// boost::detail::sp_counted_base_impl< +// B *, boost::checked_deleter +// > * +// >(NULL) +// ); + +#if (XEONA_ARCHIVE_MODE >= 1) + oa << boost::serialization::make_nvp("spa", spa); + oa << boost::serialization::make_nvp("spa1", spa1); +#else oa << spa; oa << spa1; +#endif + } // reset the shared pointer to NULL // thereby destroying the object of type B @@ -153,25 +245,40 @@ { // open the archive std::ifstream ifs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_iarchive ia(ifs); +#else boost::archive::text_iarchive ia(ifs); +#endif - // restore the schedule from the archive ia.register_type(static_cast(NULL)); - ia.register_type( - static_cast< - boost::detail::sp_counted_base_impl< - B *, boost::checked_deleter - > * - >(NULL) - ); +// ia.register_type( +// static_cast< +// boost::detail::sp_counted_base_impl< +// B *, boost::checked_deleter +// > * +// >(NULL) +// ); + +#if (XEONA_ARCHIVE_MODE >= 1) + ia >> boost::serialization::make_nvp("spa", spa); + ia >> boost::serialization::make_nvp("spa1", spa1); +#else ia >> spa; ia >> spa1; +#endif + } display(spa, spa1); + +#endif // DT code + /////////////// - std::remove(filename.c_str()); + // std::remove(filename.c_str()); // obj of type A gets destroyed // as smart_ptr goes out of scope return 0; } + --- Robbie Morrison PhD student -- policy-oriented energy system simulation Institute for Energy Engineering (IET) Technical University of Berlin (TU-Berlin), Germany University email (redirected) : morrison(a)iet.tu-berlin.de Webmail (preferred) : robbie(a)actrix.co.nz [from IMAP client]

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