- Boost-users - lists.boost.org

ASIO: When part of official Boost release?
by Andrej van der Zee 19 Jun '07

19 Jun '07

Hi, My apologies if this already has been asked, but I was wondering why the ASIO network library is not part of the standard distribution of Boost and doesn't appear on the Boost website. Will it ever be? And if so, from which Boost release is this targeted? My best regards, Andrej ___________________________________________________________ Yahoo! Answers - Got a question? Someone out there knows the answer. Try it now. http://uk.answers.yahoo.com/

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Preprocessor thingy
by Johan 't Hart 18 Jun '07

18 Jun '07

Hi, I don't know if boost has a solution for my problem, or there is just something simple I miss... I've been struggling with some preprocessor things. I'm trying to use it for versioning. Here is the problem: I've got these defines: #define VERSION_MAJOR 5 #define VERSION_MINOR 4 #define VERSION_BUILD 3 #define VERSION_SUBBUILD 2 Sometimes I just need a string like: "5.4.3.2". I do it like this: #define STRINGER_(s) #s #define STRINGER(s) STRINGER_(s) #define VERSION_STRING_1 \ STRINGER(VERSION_MAJOR) "." \ STRINGER(VERSION_MINOR) "." \ STRINGER(VERSION_BUILD) "." \ STRINGER(VERSION_SUBBUILD) So VERSION_STRING_1 is "5.4.3.2" Now I need a string like: "5.4.3b". (Note the 'b'. When VERSION_SUBBUILD == 3, I want it to be a 'c' etc) How do I do this in a preprocessor command???? The char is simple, its (VERSION_SUBBUILD+'a'-1). How do I add that to a string?? It just looks so simple, I can't stand I'm not finding a solution! I'm hoping someone could help me! Regards Johan

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[spirit] MS compiler ICE when using push_back_a
by Christian Henning 18 Jun '07

18 Jun '07

Hi there, I'm using boost 1.34 and MS VC7.1 . The following code lets my compiler ICE. #include <vector> #include <boost/spirit/core.hpp> #include <boost/spirit/actor/push_back_actor.hpp> using namespace std; namespace sp = boost::spirit; int main(int argc, char* argv[]) { vector<int> n; bool ret = parse( "12", sp::int_p[push_back_a( n )] ).full; return 0; } The reason is the push_back_a actor. Is that a known issue or am I doing something wrong? Regards, Christian

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Re: [Boost-users] [serialization]
by Johan Franzén 18 Jun '07

18 Jun '07

> I still got some starting problems with the boost::serialization library. > I want to serialize a shared_ptr to my own polymorphic class. > I'm building my own networkprotocol and the basic idea is a kind > of "header"-class which with a shared_ptr<data_base> which can point to a > lot of different data structs, which are polymorphic children of data_base. > > This "header"-class is then serialized and send to another peer. But how > should this peer get the real type from the shared_ptr<data_base>? Which > child is it pointing to? I can get the name with "typeid()", but i cannot > get the type through that way. I would like to get the type from it > automaticly without using some case-conditions, so i only have to add a new > child of data_base and can use it, without changing any networkprotocol > related code. > > Kind Regards > Manuel Jung This isn't really related to Boost.Serialization, but I think You might get what You want using the visitor pattern. That's how I manage the different message bodies in my latest project at work. (See http://en.wikipedia.org/wiki/Visitor_pattern) HTH, Johan Franzén

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Error using boost::thread for the first time.
by Simon Pickles 18 Jun '07

18 Jun '07

Hi there, I am using boost::thread for the first time as part of boost::asio. I am trying to compile the chat_client.cpp example. When I uncomment the threading line, it won't link. Here's the line in question: boost::thread t(boost::bind(&boost::asio::io_service::run, &io_service)); and heres the error: chat_client.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::thread::~thread(void)" (??1thread@boost@@QAE@XZ) referenced in function _main chat_client.obj : error LNK2019: unresolved external symbol "public: void __thiscall boost::thread::join(void)" (?join@thread@boost@@QAEXXZ) referenced in function _main chat_client.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::thread::thread(class boost::function0<void,class std::allocator<class boost::function_base> > const &)" (??0thread@boost@@QAE@ABV?$function0@XV?$allocator@Vfunction_base@boost@@@std@@@1@@Z) referenced in function _main I think I've done everything required. I've installed all the boost libraries with the Boost Consulting installer. I've added a few defines too: #define BOOST_ALL_NO_LIB // For linking with boost.thread not supported by BOOST_ALL_DYN_LINK #define BOOST_THREAD_USE_DLL // Verbose #define BOOST_LIB_DIAGNOSTIC All to no avail. I'm not getting the 'boost-*.lib not found' message..... Just missing functions! Anyone any advice? Thanks Simon _________________________________________________________________ Play your part in making history - Email Britain! http://www.emailbritain.co.uk/

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[serialization]
by Manuel Jung 18 Jun '07

18 Jun '07

Hi, I still got some starting problems with the boost::serialization library. I want to serialize a shared_ptr to my own polymorphic class. I'm building my own networkprotocol and the basic idea is a kind of "header"-class which with a shared_ptr<data_base> which can point to a lot of different data structs, which are polymorphic children of data_base. This "header"-class is then serialized and send to another peer. But how should this peer get the real type from the shared_ptr<data_base>? Which child is it pointing to? I can get the name with "typeid()", but i cannot get the type through that way. I would like to get the type from it automaticly without using some case-conditions, so i only have to add a new child of data_base and can use it, without changing any networkprotocol related code. Kind Regards Manuel Jung

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How to create a timer in boost::thread
by Meryl Silverburgh 18 Jun '07

18 Jun '07

Hi, Can you please tell me if i can do this with boost::thread library? 1. create a timer (say 5 seconds) which execute a function in a different thread when it expires. 2. the creator can cancel the timer before it expires. Thank you.

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BGL python bindings: copy.copy(g) adds spurious properties
by John Reid 18 Jun '07

18 Jun '07

Hi, When a graph is copied via copy.copy(g), extra vertex and edge property maps are added. import boost.graph as bgl g = bgl.Graph() prop = g.add_vertex_property('prop') from copy import copy g_copy = copy(g) print g.vertex_properties.keys() print g_copy.vertex_properties.keys() Output: g's vertex properties: ['prop'] g_copy's vertex properties: ['object', 'prop'] This property named 'object' contains the same values as the 'prop' property. Is this a bug in the pickling support? I have the latest version from SVN. Thanks, John.

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Can i compile Regex with _UNICODE/UNICODE instead of _MBCS under VC++6 ?
by alovespring＠gmail.com 18 Jun '07

18 Jun '07

thx!

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[boost] build of boost 1.34.0 with STLport
by LoadCom 18 Jun '07

18 Jun '07

hello, I downloaded the new boost 1.34 and try to build it. I found the doc of the new release have been improved a lot. But still with one thing I'm confused - with version 1.33.1, I can build the libs using VC6, VC7.1 or VC8.0 with different toolset files, and I also can use seperate toolset files if I want to build with STLport. In 1.34, I found only a msvc.jam and there's no STLport counterpart. Can anybody give me an explanation on this and tell me how to make a STLport build? I'm using MSVC7.1 on Windows XP. Thanks in advance. -------------- LoadCom 2007-06-16

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