May 2010 - Boost-users - lists.preview.boost.org

spirit and property_tree headers conflict
by Artem Kozlov 28 May '10

28 May '10

Hello, When attempting to compile a program which includes the following headers (at once): #include <boost/property_tree/json_parser.hpp> #include <boost/spirit/include/qi.hpp> , I get a lot of error messages. Is there any way to resolve this conflict and compile the program without dividing it into several translation units? Thanks in advance, Artem

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[Chrono] How to report problems?
by Roland Bock 28 May '10

28 May '10

Hi, after having received a push in the right direction by Howard yesterday, everything works fine so far, except for for the following two details: a) I get some warnings about unused parameters when using the stopclock. For instance: include/boost/chrono/stopwatch_reporter.hpp:81: warning: unused parameter ‘ec’ The fixes are trivial in all cases I encountered. b) The thread_clock part of the tutorial looks pretty broken. Not sure if more things will come up, but if so, where should I send them? Maybe this information would be a nice addition to the FAQ until chrono makes it into boost? Thanks for this cool library! Regards, Roland

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Exposing C++ Instances to Python
by Leonhard Weber 28 May '10

28 May '10

Hello, I'm in the same bind this topic describes: http://lists.boost.org/boost-users/2009/02/44749.php Unfortunately the subject didn't tell about the resolution or approach he took to succeed. Can anyone help me? Basically: I want to expose a C++ Instance to Python at runtime. I have a pointer to the Instance and need to expose that instance to Python. Thankful for any help, Best regards, ~lwk

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[interprocess] user application can't attach shared memory created by Windows service
by Rui Pedro Fernandes 28 May '10

28 May '10

Hi, I'm using version 1.41 in a Windows Server 2008 host. If I run an application as a service (in fact launching it with srvany) that creates a named managed_windows_shared_memory and then execute a user application that tries to attach the shm, the later cannot succeed to attach - error is: "The system cannot find the file specified". On the other hand, if the shared memory is of type managed_shared_memory then all runs fine. Couldn't this indicate that in the windows approach the file mapping object should be created with more global security and access rights? Thanks, Rui

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Re: [Boost-users] Exception on windows::stream_handle!
by Lloyd 28 May '10

28 May '10

I would like to post the reason for this exception, may it will be useful for someone else :) The create file was not created with the "Overlapped IO attribute" It should look like this CreateFile(("MyFile",GENERIC_WRITE,0,NULL,CREATE_NEW,FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,NULL); ----- Original Message ----- From: Lloyd To: boost-users(a)lists.boost.org Sent: Wednesday, May 26, 2010 2:35 PM Subject: Exception on windows::stream_handle! Hello, We are trying to create a "windows::stream_handle" from a native Windows HANDLE. But it throws an exception with "The parameter is incorrect". The code is given below. What could be the reason? (Another IOservice is already running in the system) HANDLE FileHandle=CreateFile("MyFile",FILE_WRITE_DATA,0,NULL,CREATE_NEW,FILE_ATTRIBUTE_NORMAL,NULL); if(FileHandle==INVALID_HANDLE_VALUE) { return; } try { io_service ios; windows::stream_handle StreamHandle(ios,FileHandle); ... ... } catch(std::exception& e) { Log(e.what()); //The parameter is incorrect } Thanks, Lloyd ______________________________________ Scanned and protected by Email scanner

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simple serialization of boost::variant
by Archie14 28 May '10

28 May '10

I use std::istream and std::ostream for binary serialization ( can't use boost::serialization) and can't find a way to serialize boost::variant<int, double, std::string>. I'll appreciate a code sample or link to the documentation. Thanks.

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[units] User-defined vector class template won't compile
by Terry Golubiewski 28 May '10

28 May '10

I'm trying to make a "simple" cartesian vector class. It should be similar to the quaternion example that you give in the docs, but I can't get it to compile. I've attached a complete program. Here are the error I get when I try to compile it. Lets just focus on fixing the first few errors about no binary '*'. When I understand that, perhaps I'll be able to fix the rest. Thanks, terry try.cpp using native typeof C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : error C2678: binary '*' : no operator found which takes a left-hand operand of type 'double' (or there is no acceptable conversion) C:/boost/boost_1_43_0\boost/units/detail/one.hpp(47): could be 'T boost::units::operator *<T>(const boost::units::one &,const T &)' with [ T=rci::cartesian::vector<3,double> ] C:/boost/boost_1_43_0\boost/units/detail/one.hpp(53): or 'T boost::units::operator *<double>(const T &,const boost::units::one &)' with [ T=double ] C:/boost/boost_1_43_0\boost/units/detail/one.hpp(58): or 'boost::units::one boost::units::operator *(const boost::units::one &,const boost::units::one &)' while trying to match the argument list '(double, rci::cartesian::vector<Dim,Rep>)' with [ Dim=3, Rep=double ] C:/boost/boost_1_43_0\boost/units/operators.hpp(75) : see reference to class template instantiation 'boost::units::multiply_typeof_helper<X,Y>::nested' being compiled with [ X=double, Y=rci::cartesian::vector<3,double> ] C:/boost/boost_1_43_0\boost/units/quantity.hpp(690) : see reference to class template instantiation 'boost::units::multiply_typeof_helper<X,Y>' being compiled with [ X=double, Y=rci::cartesian::vector<3,double> ] try.cpp(255) : see reference to class template instantiation 'boost::units::multiply_typeof_helper<X,Y>' being compiled with [ X=boost::units::quantity<boost::units::si::length>, Y=rci::cartesian::vector<3,double> ] C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : error C2866: 'boost::units::multiply_typeof_helper<X,Y>::nested::_typeof_register_value' : a const static data member of a managed type must be initialized at the point of declaration with [ X=double, Y=rci::cartesian::vector<3,double> ] C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : error C2027: use of undefined type 'boost::type_of::msvc_extract_type<ID>::id2type_impl<__formal>' with [ ID=boost::units::multiply_typeof_helper<double,rci::cartesian::vector<3,double>>::nested ] and [ __formal=true ] C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : error C2146: syntax error : missing ';' before identifier 'type' C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : error C2602: 'boost::units::multiply_typeof_helper<X,Y>::nested::type' is not a member of a base class of 'boost::units::multiply_typeof_helper<X,Y>::nested' with [ X=double, Y=rci::cartesian::vector<3,double> ] C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : see declaration of 'boost::units::multiply_typeof_helper<X,Y>::nested::type' with [ X=double, Y=rci::cartesian::vector<3,double> ] C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : see declaration of 'boost::units::multiply_typeof_helper<X,Y>::nested' with [ X=double, Y=rci::cartesian::vector<3,double> ] C:/boost/boost_1_43_0\boost/units/operators.hpp(74) : error C2868: 'boost::units::multiply_typeof_helper<X,Y>::nested::type' : illegal syntax for using-declaration; expected qualified-name with [ X=double, Y=rci::cartesian::vector<3,double> ] try.cpp(255) : error C2679: binary '=' : no operator found which takes a right-hand operand of type 'boost::units::quantity<Unit,Y>' (or there is no acceptable conversion) with [ Unit=boost::units::unit<boost::units::length_dimension,boost::units::si::system>, Y=int ] try.cpp(28): could be 'rci::cartesian::vector<Dim,Rep> &rci::cartesian::vector<Dim,Rep>::operator =(const rci::cartesian::vector<Dim,Rep> &)' with [ Dim=3, Rep=boost::units::quantity<boost::units::si::length> ] while trying to match the argument list '(rci::cartesian::vector<Dim,Rep>, boost::units::quantity<Unit,Y>)' with [ Dim=3, Rep=boost::units::quantity<boost::units::si::length> ] and [ Unit=boost::units::unit<boost::units::length_dimension,boost::units::si::system>, Y=int ]

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Boost and ARM like processor
by joel falcou 27 May '10

27 May '10

Is there any return of experience to actually compiles and use Boost on ARM platform (CORTEX 9 or similar). We're currently trying to look at such machien and pondered about the state of C++ compiler on them. More down to earth question, has anybody use tricky template stuff with ARM tool set and were there any problem ? thanks

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[interprocess] managed_shared_memory on Windows XP virtual machine
by Rui Pedro Fernandes 27 May '10

27 May '10

Hi, I found a problem that seems to be an issue in boost.interprocess (1.41): I was using managed_shared_memory (not managed_windows_shared_memory) and all was going fine until the day I run my applications on a virtual machine. The problem is that some applications were randomly not able to attach the shm previously created and the error was: "The system cannot find the file specified". I found that in fact the folder (under ...All Users\Application Data\boost_interprocess) where the shm file was being looked for was not the same as the folder where it was created. Is it possible that the algorithm used to build the name of the folder "thinks" for some reason that there was a system restart ? Cheers, Rui

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Compiling Boost.MPI and mpich2 under Suse Linux
by Michael1984 27 May '10

27 May '10

Hello, I am trying to compile Boost.MPI with Mpich2 under Suse Linux 10.x. After having built Mpich2, involing ./bjam install I am presented with the following error below, however, recompiling mpich2 with -fPIC does not help either. mpich2$ ./configure CXXFLAGS=-fPIC; make; make install Does anybody have any suggestions? Thanks a lot! Michael ... gcc.link.dll bin.v2/libs/mpi/build/gcc-4.3/release/threading-multi/libboost_mpi.so.1.43.0 /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/bin/ld: /mnt/thor2/michael/tools/mpich2/lib/libmpich.a(attr_get.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC /mnt/thor2/michael/tools/mpich2/lib/libmpich.a: could not read symbols: Bad value collect2: ld returned 1 exit status ... -- View this message in context: http://old.nabble.com/Compiling-Boost.MPI-and-mpich2-under-Suse-Linux-tp286… Sent from the Boost - Users mailing list archive at Nabble.com.

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