June 2007 - Boost-users - lists.preview.boost.org

Re: [Boost-users] [mpl]pop_front function on integral sequence
by Ovanes Markarian 19 Jun '07

19 Jun '07

[...] > Thanks, iterator_range works fine. What's not very nice to me is the T typename is lost for empty >sequence and after using a metafunction, so vector_c is not really usable for metaprograming, its >just a macro to easier define a vector. Well... Type never gets lost in C++ ;) What about: typedef mpl::vector_c<float, 2.0,2.1,2.2> my_vector; BOOST_MPL_ASSERT(( is_same< mpl::front<my_vector>::type::value_type, float > )); vector_c initializes a vector with integral_c derived type (like mpl::int_ or mpl::bool_) and value specified, so in this example we have most probably an mpl::vector of integral_c<float, 2.0>,..., integral_c<float, 2.2>. Anyway applying a front metafunction to any element of vector will return some integral_c<float, X> specification. Since you are interested in type contained in integral_c you can access it via integral_c<float, X>::value_type. Therefore: mpl::front<my_vector>::type::value_type ^^^^ ^^^^^ + => integral_c<float, X>::value_type + => integral_c<float, X> result in correct type resolution stored in mpl::vector. Hope that helps. With Kind Regards, Ovanes Markarian

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Configuration errors using Boost.Tr1
by Chris Fairles 19 Jun '07

19 Jun '07

RHEL5, Boost 1.34.0, GCC 4.1.1 Boost headers are installed under /usr/include echo "#include <boost/tr1/type_traits.hpp>" > test.cpp g++ -c test.cpp In file included from /usr/include/boost/tr1/type_traits.hpp:8, from test.cpp:1: /usr/include/boost/tr1/detail/config.hpp:58:26: error: no include path in which to search for utility from /usr/include/boost/tr1/type_traits.hpp:8 6 #ifndef BOOST_TR1_TYPE_TRAITS_HPP_INCLUDED 7 # define BOOST_TR1_TYPE_TRAITS_HPP_INCLUDED 8 # include <boost/tr1/detail/config.hpp> /usr/include/boost/tr1/detail/config.hpp:58:26 37 #if defined(__GNUC__) && !defined(BOOST_HAS_INCLUDE_NEXT) 38 # define BOOST_HAS_INCLUDE_NEXT 39 #endif ... 53 #ifdef BOOST_HAS_INCLUDE_NEXT 54 # ifndef BOOST_TR1_NO_RECURSION 55 # define BOOST_TR1_NO_RECURSION 56 # define BOOST_TR1_NO_CONFIG_RECURSION 57 # endif 58 # include_next <utility> Have I configured something wrong? Or am I not just not using the Boost tr1 headers correctly? Chris

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[preprocessor] Argument list conversion
by Server Levent Yilmaz 19 Jun '07

19 Jun '07

Hi, I have the following fun problem, seemingly simple, but couldn't find the trick. The objective is to convert a given argument list to some other one or more useful argument list. Each of the arguments are copied verbatim into the other list unless it is specified to be a SPECIAL_TYPE. For example the following two-argument macro function call: FUNKY_MACRO( 5, ( double*, SPECIAL_TYPE, const char[], SPECIAL_TYPE, int) ) would spit out: (double*, const char[], int, special1, special1); (double*, special1, const char[], special1, int, special2, special2); note that, in the first generated tuple SPECIAL_TYPE is replaced by some other text, and moved to the end of the tuple. In the second one, same replacement occurs and some yet other text is appended repeatedly at the end, same number of times as SPECIAL_TYPE appears in the original list. Any ideas how to do this (or part of it) with the incredibly amazing Preprocessor library? thanks -- Server Levent Yilmaz Mechanical Engineering University of Pittsburgh

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[mpl]pop_front function on integral sequence
by Vít Kasal 19 Jun '07

19 Jun '07

Hi, I have a problem with using pop_front on an integral sequence. pop_front< vector_c<T, c1, c2, ... cn> >::type results in vector<c2, ... cn> Is it intended behavior? Is there some way to get vector_c<T, c2, ... cn> > Thanks Vit

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MSVC-7.1 does not compile all the project code
by king.coffee＠att.net 19 Jun '07

19 Jun '07

Hi, I downloaded and ran bjam from the BOOST home directory. Most of the projects compiled OK. But projects using read_graphviz_spirit.cpp cause "cl.exe" to terminate. cl.exe resulted in an buffer overrun error. The cl compiler I'm using is MSVC++ 7.1 standard edition (no optimization). The OS is Windows XP Pro Thanks, King --------------------------------------------------------------- P.S: The following results from rerunning the bjam utility: WARNING: No python installation configured and autoconfiguration failed. See http://www.boost.org/libs/python/doc/building.html for configuration instructions or pass --without-python to suppress this message and silently skip all Boost.Python targets warning: Python location is not configured warning: the Boost.Python library won't be built Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). warning: No toolsets are configured. warning: Configuring default toolset "msvc". warning: If the default is wrong, you may not be able to build C++ programs. warning: Use the "--toolset=xxxxx" optio n to o verride our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html ...patience... ...patience... ...found 4024 targets... ...updating 28 targets... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\threading-multi\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\release\threading-multi\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\threading-multi\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release\threading-multi>boost_graph-vc71-mt-1_34.dll for lack of <pbin.v2\libs\graph\build\msvc-7.1\release\threading-multi>read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release\threading-multi>boost_graph-vc71-mt-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\release\threading-multi>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\debug\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug>boost_graph-vc71-gd-1_34.dll for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug>read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug>boost_graph-vc71-gd-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\release\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release>boost_graph-vc71-1_34.dll for lack of <pbin.v2\libs\graph\build\msvc-7.1\release>read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release>boost_graph-vc71-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\release>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\threading-multi\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\debug\link-static\threading-multi\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\threading-multi\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static\threading-multi>libboost_graph-vc71-mt-gd-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static\threading-multi>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\threading-multi\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\release\link-static\threading-multi\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\threading-multi\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release\link-static\threading-multi>libboost_graph-vc71-mt-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\release\link-static\threading-multi>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\debug\link-static\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static>libboost_graph-vc71-gd-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\threading-multi\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\debug\threading-multi\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\threading-multi\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug\threading-multi>boost_graph-vc71-mt-gd-1_34.dll for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug\threading-multi>read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug\threading-multi>boost_graph-vc71-mt-gd-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug\threading-multi>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\release\link-static\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release\link-static>libboost_graph-vc71-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\release\link-static>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\threading-multi\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\threading-multi\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\threading-multi\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\threading-multi>libboost_graph-vc71-mt-sgd-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\threading-multi>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\threading-multi\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\threading-multi\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\threading-multi\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\threading-multi>libboost_graph-vc71-mt-s-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\threading-multi>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static>libboost_graph-vc71-sgd-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\debug\link-static\runtime-link-static>read_graphviz_spirit.obj... compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\read_graphviz_spirit.obj read_graphviz_spirit.cpp call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul cl /Zm800 -nologo @"bin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\read_graphviz_spirit.obj.rsp" ...failed compile-c-c++ bin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static\read_graphviz_spirit.obj... ...skipped <pbin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static>libboost_graph-vc71-s-1_34.lib for lack of <pbin.v2\libs\graph\build\msvc-7.1\release\link-static\runtime-link-static>read_graphviz_spirit.obj... ...failed updating 12 targets... ...skipped 16 targets...

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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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