March 2009 - Boost-users - lists.preview.boost.org

Socket iostream Question
by Anthrope 01 Apr '09

01 Apr '09

Hello all, I am developing a high-performance socket-based application using the boost asio library. The application implements a binary tcp-based protocol that a bi-directional exchange of fixed-size messages. To simplify the coding while not sacrificing flexibility or performance, I decided to use the TCP iostream classes. The approach seems to work well, and I like the fact that the streams are buffered and allow me control over when I flush them. There's one minor issue that I thought I … [View More]

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Is boost license GPL compatible?
by Tommy Nordgren 31 Mar '09

31 Mar '09

That is, is it possible to distribute a library distributed under the boost license together with a software package distributed under the GPL. ----------------------------------- See the amazing new SF reel: Invasion of the man eating cucumbers from outer space. On congratulations for a fantastic parody, the producer replies : "What parody?" Tommy Nordgren tommy.nordgren(a)comhem.se

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zip_iterator and sTL algorithms like random_shuffle
by Andreas Fabri 31 Mar '09

31 Mar '09

Hello, I have two vectors and want to random_shuffle them the same way using the zip_iterator. I thought the code below would do it, but when I execute it I see that both sequences get screwded up. What do I wrong? Best regards, andreas #include <vector> #include <boost/iterator/zip_iterator.hpp> #include <algorithm> #include <iostream> int main() { std::vector<int> I(8), J(8); for(int i = 0; i < I.size(); i++){ I[i] = J[i] = i; } std::… [View More]

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[Q] scoped_ptr for forward declared classes
by V S P 31 Mar '09

31 Mar '09

Hello I have a situation where I have struct cmoney_impl_dtl; //hidden impl is in Cpp file struct myclass { boost::scoped_ptr<hidden_impl> myimpl_ptr; } The compiler complains that the struct hidden_impl must be fully defined in the header file (which I cannot do) ------------- c:\usr\local\boost.msvc2008\boost_1_38_0\boost\checked_delete.hpp(32) : error C2027: use of undefined type 'cmoney_impl_dtl' c:\dbt_money.hpp(38) : see declaration of 'cmoney_impl_dtl' c:\… [View More]

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warnings with boost::bind
by Hansi 31 Mar '09

31 Mar '09

Hello, I have a question. I use boost::bind with the following class: class B { int data; } class A { bool SetData(const B&){return true;}; } now when I make somewhere the following: A a; boost::bind<bool>(&A::SetData,&a); I get a warning 8>D:\boost\boost_1_34_1\boost/bind.hpp(1575) : warning C4180: qualifier applied to function type has no meaning; ignored 8> D:\boost\boost_1_34_1\boost/bind.hpp(1609) : see reference to class template instantiation '… [View More]

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Cyclic includes when using smart pointers.
by Jared Lee Richardson 31 Mar '09

31 Mar '09

Hey, I'm having trouble with cyclic includes in a project I'm working on. This is my first attempt at a project that heavily uses boost, and specifically, smart pointers. I have the following situation, simplified down. Header file 1: class Test1 { vector<Test2Ptr> mTest2Objects; }; typedef boost::shared_ptr<Test1> Test1Ptr; Header file 2: class Test2 { vector<Test1Ptr> mTest1Objects; }; typedef boost::shared_ptr<Test2> Test2Ptr; Now normally I'd get around … [View More]

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[concept check][mpl] (Conditional) Concept checking for functions
by Jesse Perla 31 Mar '09

31 Mar '09

One rough idea I had was that since I will always have boost::function declarations as the default type, I could try to see if the type F is compatible with the boost::function type? Could this be done in a simple metafunction similar to the following: template<class BoostF, class F> struct CheckFunctionCompatible { static void Check() { F f; BoostF fboost = f; //If this fails, then I am basically failing } }; But then if I instantiate, won't it also try … [View More]

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TupleIt and zip_iterator
by Andreas Fabri 31 Mar '09

31 Mar '09

Was Anthony Williams TupleIt, mentioned in http://www.cpptalk.net/7-vt9657.html?postdays=0&postorder=asc&start=90 and distributed in http://groups.yahoo.com/group/boost/files/tupleit.zip) the precursor of the boost::zip_iterator? In contrast to the boost::zip_iterator an TupleIt iterator range can be sorted. What are the advantages of the zip_iterator, besides being in boost. andreas

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Re: [Boost-users] [wave]include not found
by Ein Held 31 Mar '09

31 Mar '09

Here we go: http://rapidshare.com/files/215649826/wave.zip.html or http://uploaded.to/?id=ndz0tn

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[Q] does map.erase destroy shared_ptr ?
by V S P 31 Mar '09

31 Mar '09

Hello, I am storing database streams as associated string tag as std::map< std::string, boost::shared_ptr<otl_stream> > once in a while I need to remove a stream based on the tag, so I do //find stream based on tag //close stream s->close //call map.erase can I expect that once I call map erase the destructor of the stream will get called? (for some reason I do not see my trace statement of the destructor, but the stream destruction are unfamiliar code to me.. so I … [View More]

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