- Boost-users - lists.boost.org

Re: [Boost-users] BoostSerialization callinga customserialize method
by Elli Barasch 27 Aug '10

27 Aug '10

Robert Ramey <ramey(a)rrsd.com> wrote: >Pooyan Dadvand wrote: > >> Can you please explain me more the idea of extradata structure? >> Consider that my extradata can be a double, ublas::vector, or even >> std::vector<weak_ptr<Element> > or any new type of variables. I >> have: >> >> std::vector<std::pair<VariableData, extradata> > mData >> ... >> ar << mData; >> >> >> and each element of vector can have a different type of data with >> different size or even have pointers. (It's a heterogeneous >> container) > >The above will work as written. > >Maybe what you want is: > >template<class T> >class mytype : std::vector<std::pair<VariableData, T> > { > template<class Archive> > void serialize(Archive &ar, const unsigned int version){ > ar << boost::serialization::base_object(*this); > } >}; > >then you can > >mytype<double> m_t >... >ar << m_t > >The possibilities are endless. This really isn't about the serialization >library >but about C++ > >Robert Ramey > > > >_______________________________________________ >Boost-users mailing list >Boost-users(a)lists.boost.org >http://lists.boost.org/mailman/listinfo.cgi/boost-users

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[boost::wave] Hooks not called for conditionals
by Alden King 27 Aug '10

27 Aug '10

I am currently working on a project that uses Wave to pre-process and tokenize C/C++ code, but I am not getting everything that I expect from the preprocessing hooks. We use the preprocessing hooks to extract data about false-branches, macro calls and macro expansions so this is a major roadblock for us. I am trying to extract information about the true and false branch of #if 1 int foo; #elif 0 float foo; #else struct { } foo; #endif The first #if is seen by 'found_directive'. If that returns false, then I get #ifint foo; #eliffloat foo; #else struct { } foo; #endif Note that it skips the newline after the #if and #elif and that it doesn't reveal their conditions. If it returns true, then 'evaluated_conditional_expression also gets called and I get #if 1 // [Taken] int foo; #elif0 float foo; struct { } foo; Without the #else directive, the #endif directive, and the whitespace between #elif and it's condition. My problem is that the false branch is not seen by either function (the endif also has trouble sometimes). I therefore expected all tokens in the false branch to be processed by 'may_skip_whitespace' or 'skipped_token', but that is not the case. Could you please help me to find our how to get the tokens from the false branch of the conditional expression using the preprocessing hooks? I've attached my wave test program and a sample input file. Thanks.

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Boost Serialization calling a custom serialize method
by Pooyan Dadvand 27 Aug '10

27 Aug '10

Hi, Im trying to use the boost serialization in our project Kratos (a Multi-physics finite element code) in which I found the following problem, I have a class Variable which is derived from VariableData as follow: Class VariableData { std::size_t mKey; public: ..... }; template<class TDataType> class Variable : public VariableData { .... } Now I have a container which holds a pairs, consist of VariableData pointer to the Variable and a void* pointer to its value: std::vector<std::pair<const VariableData*, void*> > which I want to serialize but as it can be seen I dont have the pointer to data in my variable and I might need to implement a costumized version of Serialized with void* pValue as an additional parameter for VariableData and Variable classes: template<class TArchiveType> Variable::serialize(TArchiveType &rArchive, const unsigned int Version, void* pValue) { rArchive & static_cast<TDataType>(pVAlue); } The problem here is the template definition of this method which make it impossible to be virtual. I note that the library uses get_extended_type_info for this porposed. But I dont know how is its correct way of use. Can anybody give me a hint about how I can handle this problem? Just to add some restriction: - I dont want to add a hierarchy of handlers instead of pair because it adds another pointer jump to the container and reduce its performance in normal use of it - I dont want to add a version of non template members for each archive type while it makes a lot of duplications and makes extra dependency to the archive types in a layer of code which is not expected to have this dependency Thanks, Pooyan. ____________________________________________________________________________ ____________________________________________________________________________ _______________________ Dr. Pooyan Dadvand Member of Kratos team International Center for Numerical Methods in Engineering - CIMNE Campus Norte, Edificio C1 c/ Gran Capitán s/n 08034 Barcelona, España Tel: (+34) 93 401 56 96 Fax: (+34) 93.401.65 17 web: <http://www.cimne.com> www.cimne.com <http://www.cimne.com/kratos/> www.cimne.com/kratos/ ____________________________________________________________________________ ____________________________________________________________________________ _______________________ AVISO IMPORTANTE Los datos de carácter personal contenidos en el mensaje, se registrarán en un fichero para facilitar la gestión de las comunicaciones de CIMNE. Se pueden ejercitar los derechos de acceso, rectificación, cancelación y oposición por escrito, dirigiéndose a nuestras oficinas de CIMNE, Gran Capitán s/n, Edificio C1 - Campus Norte UPC, 08034 Barcelona, España. AVÍS IMPORTANT Les dades de caràcter personal contingudes en aquest missatge es registraran en un fitxer per facilitar la gestió de les comunicacions del CIMNE. Es poden exercir els drets d'accés, rectificació, cancel·lació i oposició, per escrit a les nostres oficines del CIMNE, Gran Capità s/n, Edifici C1, Campus Nord UPC, 08034 Barcelona, Espanya. IMPORTANT NOTICE All personal data contained in this mail will be processed confidentially and stored in a file property of CIMNE in order to manage corporate communications. You may exercise the right of access, rectification, deletion and objection by letter sent to CIMNE, Gran Capitán, Edificio C1 - Campus Norte UPC, 08034 Barcelona, Spain.

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[Hash] Custom hash_value for Pointers
by Hossein Haeri 27 Aug '10

27 Aug '10

Dear all, Should not the program in the P.S. output "I got used!"? If not, how can I ensure that it's size_t hash_value(B*) which gets called upon use of bPtrHasher's operator()? TIA, --Hossein P.S. namespace Bs { struct B { virtual string id() const {return "This is a B!";} }; struct D: B { string id() const {return "And, this one is a D.";} }; size_t hash_value(B* bptr) { cout << "I got used!" << endl; boost::hash<string> hasher; return hasher(bptr->id()); } } int main() { Bs::B* bp1 = new Bs::B; Bs::B* bp2 = new Bs::D; boost::hash<Bs::B*> bPtrHasher; size_t h1 = bPtrHasher(bp1), h2 = bPtrHasher(bp2); }

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NDEBUG causes a compilation error in Boost.Interprocess
by Sergey Kurenkov 27 Aug '10

27 Aug '10

I use Boost 1.42 and gcc 4.3.1 on HP-UX 11.31. So today I defined NDEBUG and BOOST_DISABLE_ASSERTS in my makefile, ran make and got this error: ../../../src/libs/src/external/boost/1.42.0/boost/interprocess/sync/posix/semaphore_wrapper.hpp: In function 'void boost::interprocess::detail::semaphore_close(sem_t*)': ../../../src/libs/src/external/boost/1.42.0/boost/interprocess/sync/posix/semaphore_wrapper.hpp:102: error: 'assert' was not declared in this scope ../../../src/libs/src/external/boost/1.42.0/boost/interprocess/sync/posix/semaphore_wrapper.hpp: In function 'void boost::interprocess::detail::semaphore_destroy(sem_t*)': ../../../src/libs/src/external/boost/1.42.0/boost/interprocess/sync/posix/semaphore_wrapper.hpp:137: error: 'assert' was not declared in this scope If I do not set NDEBUG and BOOST_DISABLE_ASSERTS everything is OK. Seems like the problem is that in semaphore_wrapper.hpp there is a call to assert() and if NDEBUG is set then correct headers are not included.

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[Serialization] Combination of templates and polymorphism
by Michal Gregor 27 Aug '10

27 Aug '10

I am writing serialization for a template library I created. The problem is that I cannot figure out how to serialize templates of polymorphic classes (combination of polymorphism and templates). Polymorphic classes generally need to be exported using BOOST_CLASS_EXPORT, which however takes in a complete type so this would require me to register all possible instantiations of the templates, which is not possible - I don't know beforehand what instantiations might the library user make (I would have to rely on the user of the library to do the work and there is no way the user will even know which template classes may be instantiated behind the scenes somewhere). What I would like is a mechanism that would automagically register the class upon instantiation. Any ideas? -- View this message in context: http://old.nabble.com/-Serialization--Combination-of-templates-and-polymorp… Sent from the Boost - Users mailing list archive at Nabble.com.

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How to disable warnings on gcc?
by Jean-Pierre Bergamin 27 Aug '10

27 Aug '10

Dear boost users On FreeBSD 8.1 with boost 1.43 and gcc 4.2.1 we have lots of warnings like: ... /usr/local/include/boost/type_traits/is_unsigned.hpp: In instantiation of 'boost::detail::is_ununsigned_helper<short int>': /usr/local/include/boost/type_traits/is_unsigned.hpp:73: instantiated from 'boost::detail::is_unsigned_imp<short int>' /usr/local/include/boost/type_traits/is_unsigned.hpp:123: instantiated from 'boost::is_unsigned<short int>' /usr/local/include/boost/type_traits/make_unsigned.hpp:110: instantiated from 'boost::detail::make_unsigned_imp<short int>' /usr/local/include/boost/type_traits/make_unsigned.hpp:130: instantiated from 'boost::make_unsigned<short int>' /usr/local/include/boost/lexical_cast.hpp:846: instantiated from here /usr/local/include/boost/type_traits/is_unsigned.hpp:40: warning: comparison between 'enum boost::detail::is_unsigned_values<short int>::<anonymous>' and 'enum boost::detail::is_unsigned_values<short int>::<anonymous>' ... Similar warnings about "comparison between ..." pop up in the serialization library as well. What is the easiest way to suppress these warnings? I tried using the switches "-Wno-sign-compare" and "-Wno-conversion", but the warnings don't go away. Thanks for your help James

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[Serialization] Is there any documentation on make_nvp()?
by Robert Jones 27 Aug '10

27 Aug '10

If so, please point me to it. Thx - Rob.

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Missing lib with Boost::Regex
by Emir D. 27 Aug '10

27 Aug '10

Hello everybody, I'm having some problems with using Boost's Regex in MS Visual Studio 2010. I've included the header file and downloaded the "bjam.exe" file, which I have run and it generated some lib and obj files. After including the newly generated files in VS2010, when I try to compile, I get the following: "fatal error LNK1104: cannot open file 'libboost_regex-vc100-mt-gd-1_43.lib' " I've inspected the bjam.exe generated files and it appears to have a lib file 'libboost_regex-vc100-mt-1_43.lib', but not 'libboost_regex-vc100-mt-gd-1_43.lib'. After doing some more googling, I have found a number of related questions, but failed to find an answer, although it seems to be a common problem. Can you please help me solve my problem? Thanks in advance, p.s. If i rename the lib file, it works, at least for now. However, it is a 'Release' version and therefore I can't using it in VS in debugging mode, meaning that I can only BatchBuild and create Release versions of my program, although I also need to create debug ones. p.s.s. My first Boost Mailing List post! p.s.s.s. I've just found out that VS10 has TR1 support, so I can TR1 Regex, which is Boost's Regex :) but I am still wondering how could of I solved the above stated problem? It's bound to happen with some other Boost library.

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Boost test, segmentation fault.
by Matthijs Mohlmann 27 Aug '10

27 Aug '10

Hello all, First of all: I'm building an application and with that I use Boost test for unit testing. This helped me already to fix some obscure bugs. (I am very happy with boost test) I have the Master suite test setup in one file and the normal test suites each in one file. This worked very well. Now I have the following test suite which gives me a segmentation fault and I have no idea why: BOOST_AUTO_TEST_SUITE(ProgramOptions) BOOST_AUTO_TEST_CASE(ProgramOptions_Valid_Options) { // Output boost::test_tools::output_test_stream output("misc/ProgramOptions_01.output", true); // Save output buffer std::streambuf *strmbuffer; strmbuffer = std::cout.rdbuf(); // Redirect the output. std::cout.rdbuf(output.rdbuf()); // Redirect output stream so we can do some checks. printSomething(); BOOST_REQUIRE(output.match_pattern()); // Now lets process some arguments. printSomething(); BOOST_REQUIRE(output.match_pattern()); // Restore output buffer std::cout.rdbuf(strmbuffer); } BOOST_AUTO_TEST_SUITE_END() The function that gets tested: void printSomething() { std::cout << "Test output" << std::endl; } If I put the same content 'Test output' in the ProgramOptions_01.output file then everything is fine and executes ok. When putting different content in that file it goes wrong. I have also a gdb backtrace if that is interesting: (gdb) r Starting program: /home/matthijs/Projects/cppcms/trunk/cmsapp_test [Thread debugging using libthread_db enabled] Running 10 test cases... Program received signal SIGSEGV, Segmentation fault. 0xb7f6f9e8 in vtable for boost::unit_test::progress_monitor_t () from /usr/lib/libboost_unit_test_framework.so.1.42.0 (gdb) bt full #0 0xb7f6f9e8 in vtable for boost::unit_test::progress_monitor_t () from /usr/lib/libboost_unit_test_framework.so.1.42.0 No symbol table info available. #1 0xb7e5b77f in std::ostream::flush() () from /usr/lib/libstdc++.so.6 No symbol table info available. #2 0xb7f0a13d in boost::unit_test::output::compiler_log_formatter::log_finish(std::ostream&) () from /usr/lib/libboost_unit_test_framework.so.1.42.0 No symbol table info available. #3 0xb7f2e492 in boost::unit_test::unit_test_log_t::test_finish() () from /usr/lib/libboost_unit_test_framework.so.1.42.0 No symbol table info available. #4 0xb7f1a593 in boost::unit_test::framework::run(unsigned long, bool) () from /usr/lib/libboost_unit_test_framework.so.1.42.0 No symbol table info available. #5 0xb7f2f469 in boost::unit_test::unit_test_main(bool (*)(), int, char**) () from /usr/lib/libboost_unit_test_framework.so.1.42.0 No symbol table info available. #6 0x08062133 in main (argc=1, argv=0xbffff824) at /usr/include/boost/test/unit_test.hpp:59 No locals. Hopefully someone with some insight in boost.test can help me out here... Regards, Matthijs Möhlmann

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