October 2006 - Boost-users - lists.preview.boost.org

boost installation query...
by yogendra karki 13 Oct '06

13 Oct '06

Hello all, while installing boost in a linux system i noticed a strange thing. i installed boost in two ways:- 1. in default directory (/usr/local) 2. by specifying a installation directory with "--prefix" option. (/usr/local/boost) the strange thing is that the result include files and library files in both the cases are different. and the files created with step 2 are throwing regex exception in a multithreaded environment. please can you help me in this ... Thanks & Regards Yogendra

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Re: [Boost-users] [Serialization] Serializing to a void * and asize?
by Nat Goodspeed 12 Oct '06

12 Oct '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Baranowski, Daniel > Sent: Thursday, October 12, 2006 12:38 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] [Serialization] Serializing to a void * and > asize? > > Thanks a bunch Nat, you've been a big help. Glad it was a simple > solution. [Nat] You're welcome. > // Get the size of the buffer and a pointer to it > std::string sBuff = sTestBinary1.str(); > size_t iSize = sBuff.size(); // ?? How do I get the size ?? [Nat] std::string::length() > void * pVoid = (void *)sBuff.c_str(); // ?? Is this the right pointer > ?? [Nat] Sure, if you have to pass a void* and a size_t into some function.

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Re: [Boost-users] boost::thread queries
by Nat Goodspeed 12 Oct '06

12 Oct '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Sascha Seewald > Sent: Thursday, October 12, 2006 9:14 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] boost::thread queries > > > This is kind of an abstraction that should be built on top of boost > > threads. > > yeah! i'd like to see this layer provide more syncronisation related > functionality like: > > - multi threaded containers > - futures > - locking_ptr > - ... > > what else? [Nat] What about some of Java's concurrent package http://g.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.ht ml now integrated into J2SE5 as java.util.concurrent http://gee.cs.oswego.edu/dl/jsr166/dist/docs/ ?

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SFINAE, gcc 3.2.3 problem
by Ovanes Markarian 12 Oct '06

12 Oct '06

Hello! I have a problem with g++ 3.2.3 which has a bug for SFINAE. In my code I am trying to find out if some certain message handler is implemented or not (I know that I could do it via virtual function, but I would like to try doing it first without). The solution for that kind of meta-program is well known and can be represented as the following class: template<class ResultT, class ClassT, class ParamT> struct can_handle_message { template<ResultT (ClassT::*)(ParamT&)> struct wrapper; template<typename U> static char(&test(U*, wrapper<&U::handleMessage>* w=0))[1]; static char(&test(...))[2]; typedef boost::mpl::bool_<1==sizeof(test(static_cast<ClassT*>(NULL)))> result; }; g++ 3.4.3 compiles it fine, but g++ 3.2.3 fails. Somewhere in the newsgroups I read that g++ 3.2.3 needs a complete type as workaround to compile. Since the function I am looking for is parameterized I can not provide a complete type. Is there any boost analog which can help me in any way? Many thanks! With Kind Regards, Ovanes Markarian

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Question regarding ptr_containers
by Edwin Savarimuthu 12 Oct '06

12 Oct '06

Hi all, Excuse me if this is asked before. I have a question regarding pointer containers. I have an object A which comes from a third party and * unfortunately* it can throw an exception from the destructor. How ptr_container deals with this situation? Let's say I have pointer container going out of scope and when it is trying to delete one of the contained pointer the object's destructor threw an exception. Does the container catch it, ignore it and proceeds with other delete-s? Or is it a requirement for the stored object that it shouldn't throw an exception from the destructor? I'm not arguing is hould be one way or the other ;) I just want to know the current behaviour. Thanks, /Z

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[lambda] Binding to simple object through smart pointer fails
by aDi Rob 12 Oct '06

12 Oct '06

I am new to using lambda expressions and have come across a problem I can't seem to resolve - would appreciate any insight on this. The following code fails to compile with VC++ 2003: #include "stdafx.h" class IX { public: virtual double value() const = 0 ; } ; class X : public IX { public: explicit X(double value) : value_( value ) {} virtual double value() const { return value_ ; } private: X() { } double value_ ; } ; int _tmain(int argc, _TCHAR* argv[]) { using namespace boost ; using namespace boost::lambda ; using namespace std ; typedef boost::shared_ptr<IX> XPtr ; XPtr x3( new X( 99 ) ) ; XPtr x4( new X( 199 ) ) ; std::vector<XPtr> xptrs ; xptrs.push_back( x3 ) ; xptrs.push_back( x4 ) ; for_each( xptrs.begin(), xptrs.end(), std::cout << bind( &IX::value, _1 ) ) ; return 0; } I get the following compile-time error reported and i've looked at it and can't seem to locate the problem - if anyone could help me with this I would appreciate it, thanks. Adrian. COMPILATION ERROR--->>> u:\boost\1.32.0\include\boost\lambda\detail\actions.hpp(87) : error C2665: 'boost::lambda::function_adaptor<Func>::apply' : none of the 2 overloads can convert parameter 2 from type 'std::allocator<_Ty>::value_type' with [ Func=boost::lambda::return_type_N<boost::lambda::function_action<2>,boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::rets_t>::plain_Func ] and [ _Ty=XPtr ] u:\boost\1.32.0\include\boost\lambda\detail\function_adaptors.hpp(179): could be 'Result boost::lambda::function_adaptor<Func>::apply<RET>(Result (__thiscall IX::* )(void) const,const Object *)' with [ Result=double, Func=boost::lambda::return_type_N<boost::lambda::function_action<2>,boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::rets_t>::plain_Func , RET=boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type >&,const boost::tuples::null_type &,const boost::tuples::null_type &,const >boost::tuples::null_type >&,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type, Object=IX ] u:\boost\1.32.0\include\boost\lambda\detail\function_adaptors.hpp(183): or 'Result boost::lambda::function_adaptor<Func>::apply<RET>(Result (__thiscall IX::* )(void) const,const Object &)' with [ Result=double, Func=boost::lambda::return_type_N<boost::lambda::function_action<2>,boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::rets_t>::plain_Func , RET=boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type >&,const boost::tuples::null_type &,const boost::tuples::null_type &,const >boost::tuples::null_type >&,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type, Object=IX ] while trying to match the argument list '(const rt0 , std::allocator<_Ty>::value_type)' with [ _Ty=XPtr ] u:\boost\1.32.0\include\boost\lambda\detail\lambda_functor_base.hpp(408) : see reference to function template instantiation 'RET boost::lambda::function_action<I>::apply<RET,U,boost::shared_ptr<T>>(A1 & ,A2 &)' being compiled with [ RET=boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type, I=2, U=const rt0, T=IX, A1=const rt0, A2=std::allocator<XPtr>::value_type ] u:\boost\1.32.0\include\boost\lambda\detail\select_functions.hpp(30) : see reference to function template instantiation 'RET boost::lambda::lambda_functor_base<Act,Args>::call<boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>::type,A,B,C,Env>(A &,B &,C &,Env &) const' being compiled with [ RET=boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type, Act=boost::lambda::action<2,boost::lambda::function_action<2>>, Args=boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>, SigArgs=boost::tuples::tuple<std::allocator<XPtr>::value_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, A=std::allocator<XPtr>::value_type, B=const boost::tuples::null_type, C=const boost::tuples::null_type, Env=const boost::tuples::null_type ] u:\boost\1.32.0\include\boost\lambda\detail\operator_lambda_func_base.hpp(212) : see reference to function template instantiation 'boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>::type boost::lambda::detail::select<boost::lambda::lambda_functor_base<Act,Args>,A,B,C,Env>(const boost::lambda::lambda_functor<T> &,A &,B &,C &,Env &)' being compiled with [ Act=boost::lambda::action<2,boost::lambda::function_action<2>>, Args=boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>, SigArgs=boost:: tuples::tuple<std::allocator<XPtr>::value_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,const boost::tuples::null_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, A=std::allocator<XPtr>::value_type, B=const boost::tuples::null_type, C=const boost::tuples::null_type, Env=const boost::tuples::null_type, T=boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>> ] u:\boost\1.32.0\include\boost\lambda\detail\lambda_functors.hpp(148) : see reference to function template instantiation 'RET boost::lambda::lambda_functor_base<Act,Args>::call<boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>::type,A,const boost::tuples::null_type,const boost::tuples::null_type,const boost::tuples::null_type>(A &,B &,C &,Env &) const' being compiled with [ RET=boost::lambda::lambda_functor_base<boost::lambda::bitwise_action<boost::lambda::leftshift_action>,boost::tuples::tuple<boost::lambda::detail::IF<true,std::ostream &,const boost::lambda::const_copy_argument<std::ostream>::type>::RET,boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::sig<boost::tuples::tuple<std::allocator<XPtr>::value_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type, Act=boost::lambda: :bitwise_action<boost::lambda::leftshift_action>, Args=boost::tuples::tuple<boost::lambda::detail::IF<true,std::ostream &,const boost::lambda::const_copy_argument<std::ostream>::type>::RET,boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, SigArgs=boost::tuples::tuple<std::allocator<XPtr>::value_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, A=std::allocator<XPtr>::value_type, B=const boost::tuples::null_type, C=const boost::tuples::null_type, Env=const boost::tuples::null_type ] c:\Program Files\msvs2003\Vc7\include\algorithm(21) : see reference to function template instantiation 'boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>::type boost::lambda::lambda_functor<T>::operator ()<std::allocator<_Ty>::value_type>(A &) const' being compile d with [ Act=boost::lambda::bitwise_action<boost::lambda::leftshift_action>, Args=boost::tuples::tuple<boost::lambda::detail::IF<true,std::ostream &,const boost::lambda::const_copy_argument<std::ostream>::type>::RET,boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, SigArgs=boost::tuples::tuple<std::allocator<XPtr>::value_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, T=boost::lambda::lambda_functor_base<boost::lambda::bitwise_action<boost::lambda::leftshift_action>,boost::tuples::tuple<boost::lambda::detail::IF<true,std::ostream &,const boost::lambda::const_copy_argument<std::ostream>::type>::RET,boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bin d_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>, _Ty=XPtr, A=std::allocator<XPtr>::value_type ] c:\development\lambdaSpike\lambdaSpike.cpp(56) : see reference to function template instantiation '_Fn1 std::for_each<std::vector<_Ty>::iterator,boost::lambda::lambda_functor<T>>(_InIt,_InIt,_Fn1)' being compiled with [ _Fn1=boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::bitwise_action<boost::lambda::leftshift_action>,boost::tuples::tuple<boost::lambda::detail::IF<true,std::ostream &,const boost::lambda::const_copy_argument<std::ostream>::type>::RET,boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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_tr aits<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::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>, _Ty=XPtr, T=boost::lambda::lambda_functor_base<boost::lambda::bitwise_action<boost::lambda::leftshift_action>,boost::tuples::tuple<boost::lambda::detail::IF<true,std::ostream &,const boost::lambda::const_copy_argument<std::ostream>::type>::RET,boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<double (__thiscall IX::* const )(void) const>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_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,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>, _InIt=std::vector<XPtr>::iterator ] Build Time 0:01 Build log was saved at "file://c:\development\lambdaSpike\Debug\BuildLog.htm" lambdaSpike - 1 error(s), 0 warning(s)

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Re: [Boost-users] [Serialization] Serializing to a void * and a size?
by Nat Goodspeed 12 Oct '06

12 Oct '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Baranowski, Daniel > Sent: Wednesday, October 11, 2006 2:06 PM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] [Serialization] Serializing to a void * and a size? > > I guess my questions is, what's the best way to serialize to a void * > and a size? I'm pretty illiterate on streams, so I've started to read up > on it, but I haven't figured it out yet, though I feel that's probably > where the answer lies. > > std::ostringstream sTestBinary1; > boost::archive::binary_oarchive oa(sTestBinary1); > oa << *pA; > > // Get the size of the buffer and a pointer to it > size_t iSize = 0;//sTestBinary1.size(); // ?? How do I get the size > ?? > void * pVoid = sTestBinary1.rdbuf(); // ?? Is this the right pointer > ?? [Nat] Are you familiar with the std::ostringstream::str() method?

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Re: [Boost-users] [Serialization] Serializing to a void * and a size?
by Baranowski, Daniel 12 Oct '06

12 Oct '06

> From: "Robert Ramey" > Subject: Re: [Boost-users] [Serialization] Serializing to a void * and > a size? ..snip.. > Look inthe documenation Reference/Serializable Concept/Serialzation > Wrappers/ Binary Objects ..snip.. > > // Create an object on the heap > > A * pA = new A; > > pA->x = 1234567890; > > > > // serialize it > > std::ostringstream sTestBinary1; > > boost::archive::binary_oarchive oa(sTestBinary1); > oa << binary_object(sizeof(A), pA); ..snip.. Thanks for replying Robert! I'm not quite sure that's what I was after though. I'm concerned with when I make class A more complicated and it holds data that is beyond the sizeof(A), such as a pointer to data new'ed on the heap. Since I'm new with the serialization library, bear with me, if I completely missed what binary_object does. What I am trying to do is basically get all the data that would be written to the file when using a binary_oarchive (or text_oarchive if that would be better). Then take that data, and pass it off as a void * to that data that was serialized and the sizeof that data. I think what you showed me, while usefully, is a quick way of serializing a simple struct/class. The more I think about this, the more I wonder if this is a boost question or a stream question. Never-the-less, if you have any advice, I would be very thankful. Regards, Daniel ********************************************************************************************** Disclaimer - This email and any files transmitted with it are proprietary and may contain privileged or copyright information. You must not present this message to another party without gaining permission from the sender. If you are not the intended recipient you must not copy, distribute or use this email or the information contained in it for any purpose other than to notify us. If you have received this message in error, please notify the sender immediately, and delete this email from your system. We do not guarantee that this material is free from viruses or any other defects although due care has been taken to minimize the risk. eSafe scanned this email for viruses, vandals and malicious contentAny views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of LSI. **********************************************************************************************

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[Serialization] Serializing to a void * and a size?
by Baranowski, Daniel 11 Oct '06

11 Oct '06

I've been tasked with creating a set of objects that will need to be passed off to some other function as raw data in the form of a void * and a size. Eventually, this goes through some networking code and through the process of magic, shows up on another computer and has to be reassembled. So, to avoid being limited to simple structs where I could just cast it to a void * and get the sizeof(), I was thinking about using the serialization library. The examples are all very good and have helped me understand how to serialize to a file, and I even saw an example for using serializing with asio (which I wish I could use). Unfortunately, I don't have control over the networking and can't use the asio library. I guess my questions is, what's the best way to serialize to a void * and a size? I'm pretty illiterate on streams, so I've started to read up on it, but I haven't figured it out yet, though I feel that's probably where the answer lies. Here's a test program that compiles, but obviously doesn't work: #include <sstream> #include <boost/archive/binary_oarchive.hpp> #include <boost/archive/binary_iarchive.hpp> // A very simple test class with some data in it class A { private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ ar & x; } public: A::A(){ x = 0; } // default constructor int x; virtual A::~A(){} // default destructor }; int main(int argc, char *argv[]) { // Create an object on the heap A * pA = new A; pA->x = 1234567890; // serialize it std::ostringstream sTestBinary1; boost::archive::binary_oarchive oa(sTestBinary1); oa << *pA; // Get the size of the buffer and a pointer to it size_t iSize = 0;//sTestBinary1.size(); // ?? How do I get the size ?? void * pVoid = sTestBinary1.rdbuf(); // ?? Is this the right pointer ?? // .. Magic occurs here (gets sent across the network as the raw data) // Create a stream to read from std::istringstream sTestBinary2; sTestBinary2.read((char *)pVoid, iSize); // open the archive boost::archive::binary_iarchive ia(sTestBinary2); // restore the object from the archive A * pB = new A; // pB->x equals 0 now ia >> *pB; // Make sure the objects contain the same data assert(pA->x == pB->x); return 0; } Thanks for any help, Daniel ********************************************************************************************** Disclaimer - This email and any files transmitted with it are proprietary and may contain privileged or copyright information. You must not present this message to another party without gaining permission from the sender. If you are not the intended recipient you must not copy, distribute or use this email or the information contained in it for any purpose other than to notify us. If you have received this message in error, please notify the sender immediately, and delete this email from your system. We do not guarantee that this material is free from viruses or any other defects although due care has been taken to minimize the risk. eSafe scanned this email for viruses, vandals and malicious contentAny views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of LSI. **********************************************************************************************

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Release 1.34
by Vinzenz 'evilissimo' Feenstra 11 Oct '06

11 Oct '06

Hi, I'm wondering if you could tell me which month you're expecting for releasing 1.34 and whether asio will be part of 1.34. Thanks, Regards, Vinzenz

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