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

Re: [Boost-users] boost programmer_option.hpp
by Narendra R 14 Jul '09

14 Jul '09

> > Thx ravi, I got to know and it working. I was not knowing that -l is for searching the lib object -L for lib path or for linking object. Thanks one again > > ------------------------------ > > Message: 4 > Date: Sat, 11 Jul 2009 11:03:20 -0400 > From: Ravi <lists_ravi(a)lavabit.com> > Subject: Re: [Boost-users] boost programmer_option.hpp > To: boost-users(a)lists.boost.org > Message-ID: <200907111103.20188.lists_ravi(a)lavabit.com> > Content-Type: Text/Plain; charset="iso-8859-15" > > On Friday 10 July 2009 01:28:44 Narendra R wrote: > > I tried to link like this > > g++ -I /home/narendra/boost_instal/boost_1_39_0 test.cpp -o test -L > > /home/narendra/boost_instal/boost_1_39_0/stage/lib > > > -l/home/narendra/boost_instal/boost_1_39_0/stage/lib/libboost_program_optio > >ns-gcc41-mt-1_39.a > > The '-l' is not required when explicitly specifying the whole library. So, > you > would use one of the following. Replace $INS with > /home/narendra/boost_instal/boost_1_39_0 in the code below. > > Option 1: > > g++ -I$INS test.cpp -o test $INS/libboost_program_options-gcc41-mt-1_39.a > > Option 2: > > g++ -I$INS test.cpp -o test -L $INS/stage/lib > -lboost_program_options-gcc41- > mt-1_39 > > In option 2, depending on whether you use static linking or dynamic > linking, > you may want to set LD_LIBRARY_PATH before running the example. > > Regards, > Ravi > > > > ------------------------------ > > Message: 5 > Date: Sat, 11 Jul 2009 11:08:52 -0400 > From: Ravi <lists_ravi(a)lavabit.com> > Subject: Re: [Boost-users] Boost Python is slow? > To: boost-users(a)lists.boost.org > Message-ID: <200907111108.52321.lists_ravi(a)lavabit.com> > Content-Type: Text/Plain; charset="iso-8859-1" > > On Thursday 09 July 2009 05:00:47 Tyomich on the AIR wrote: > > And then when I use a simple function which just increments the x member > of > > every object, this function takes about 4 seconds to process the whole > list > > (1000000 items) of Boost-wrapped objects and less than a second to > process > > objects of my own wrapping! How this can be possible? Is Boost.Python > much > > more slower than Python itself? > > Boost.Python is a little slower than wrapping directly using Python C-API, > especially in very simple cases like yours. (It is a variant of the > abstraction penalty.) However, it is hard to believe that it is 4x slower. > Would you mind posting complete compilable examples so that we can take a > look > at it? > > Regards, > Ravi > > >

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Re: [Boost-users] [Program Options] Difficulty compiling for static runtime library
by Lindley M French 14 Jul '09

14 Jul '09

> It does not seem you have tried *exactly* what Steven has suggested. Ah! Yes, when I do this: bjam.exe debug runtime-link=static link=static --with-program_options it at least appears to be *trying* to do the right thing. Still no joy on the burn, though. ...patience... ...found 523 targets... ...updating 26 targets... common.mkdir bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static common.mkdir bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\cmdline.obj cmdline.cpp libs\program_options\src\cmdline.cpp(272) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning) compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\config_file.obj config_file.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\options_description.obj options_description.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\parsers.obj parsers.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\variables_map.obj variables_map.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\value_semantic.obj value_semantic.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\positional_options.obj positional_options.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\utf8_codecvt_facet.obj utf8_codecvt_facet.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\convert.obj convert.cpp compile-c-c++ bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\winmain.obj winmain.cpp failed to write output file 'bin.v2\libs\program_options\build\msvc-8.0\release\link-static\runtime-link-static\threading-multi\libboost_program_optio ns-vc80-mt-s-1_39.lib.rsp'! What could cause this? All the other builds have worked fine, and I'm not low on drive space or anything.

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asio DNS SRV
by Etienne Philip Pretorius 14 Jul '09

14 Jul '09

Hello list, I ran across an old post, http://osdir.com/ml/lib.boost.asio.user/2007-05/msg00108.html, and I am wandering if asio does support DNS SRV records now? Thank you Etienne

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Regular Expression
by Wong Peter 14 Jul '09

14 Jul '09

Hello to all, i want to search a container which copied from file with certain regular expression and then display it to stdout; Here is my code: [code] std::cout << "\n\nEnter Search designation : "; std::string userDesignation; getline(std::cin, userDesignation); std::ifstream inHandle("C:\\Staff.txt"); std::vector<std::string> data; data.reserve(100); std::copy(std::istream_iterator<std::string>(inHandle), std::istream_iterator<std::string>(), std::back_inserter(data) ); boost::regex searchExpression(userDesignation); boost::match_results<std::vector<std::string>::iterator > result; boost::regex_match(data.begin(), data.end(), result, searchExpression); [/code] The error is error C2664: 'char boost::w32_regex_traits<charT>::translate(charT,bool) const' : cannot convert parameter 1 from 'std::basic_string<_Elem,_Traits,_Ax>' to 'char' error C2664: 'char boost::w32_regex_traits<charT>::translate(charT,bool) const' : cannot convert parameter 1 from 'std::basic_string<_Elem,_Traits,_Ax>' to 'char' I think the error cause by vector string iterator rather than string iterator. Any workaround solution to this problem ? Thanks. -- Linux

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[Multi-Index] New "hierarchical" indexing?
by Dominique Devienne 14 Jul '09

14 Jul '09

I'm using BMI containers with several indexes, notably an index on the parent of each entry. But some of my BMIs have a hierarchical parent-child relationship of their entries, and I need to answer hierarchical queries like is-child-of, is-descendant-of, is-ancestor-of, etc... In another use case, entries have a "scenario" key, where scenario is hierarchical, and I want all entries in BMI A from a given scenario and all its ancestors, with the scenarios being in BMI B (i.e. "cross-bmi"). Of course I can do a "full scan" but I'm looking for something hopefully faster/smarter. Has anyone experimented with providing such a specialized index? At least in one instance, I'm manually keeping a separate container with all the edges of the DAG to be able to answer such a query, but then I have to maintain this "index" separately from the BMI, which is precisely what BMI is designed to avoid. This is also a solution that is OK in this particular case (~ 1500 nodes, ~7500 edges), but may be too expensive for some other graphs with more nodes. Any input would be appreciated. Thanks, --DD

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[Q] regular expressions change the 'substitue with' value
by V S P 14 Jul '09

14 Jul '09

Looking for some help with how to use regular expression library I have a string "!1!" I am replacing it with "\temp\i\otrq92rq40100__db1003.xls" ( a windows path to a file) This is how I am doing it std::string repl=subst_designator+ boost::lexical_cast<std::string>(counter)+ subst_designator; boost::algorithm::replace_all_regex(new_arg, boost::regex(repl),*res_it); Where: subst_designator = '!' counter = 1 new_arg = "!1!" *res_it="\temp\i\otrq92rq40100__db1003.xls" after the above code, the new_arg contains a strange string that appears to have back slashes removed and the first \t replaced with something like a 'tab' new_arg=" empiotrq92rq40100__db1003.xls" I am thinking that this is wrong, because the regular expression should copy without modifications the value of *res_it into the new_arg I am using 1.38 on windows with VS9. My question is , how can make it so the string in *res_it substitutes !1! thank you in advance, Vlad -- Vlad P author of C++ ORM http://github.com/vladp/CppOrm/tree/master -- http://www.fastmail.fm - IMAP accessible web-mail

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Linking to release boost libs form debug build
by johnnyk427 14 Jul '09

14 Jul '09

I've noticed my boost libs are slowing my game down incredibly in my debug builds. I'd like to link to release boost libs even in Debug, is that possible and will it cause any problems? Heres what I've got so far: I've managed to stop my project from auto-linking to the generated lib names (by adding #define BOOST_ALL_NO_LIB), and listed the libs I want to include manually, but now I get link errors like this: libcmt.lib(invarg.obj) : error LNK2005: __initp_misc_invarg already defined in Libcmtd.lib(invarg.obj) It wants to link to the release RunTime, but my project is linking to the debug RunTime. So it seems that I want to create my boost libs so that they are release (and optimized), but link to the debug runtime. Is it even possible to build the libs like that? I'm studying boost jam now but having a hard time understanding how I would make libs as such. Thanks for any help you can offer, -John Thanks! -John -- View this message in context: http://www.nabble.com/Linking-to-release-boost-libs-form-debug-build-tp2445… Sent from the Boost - Users mailing list archive at Nabble.com.

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Date Time I/O formatting question
by Polder, Matthew J 13 Jul '09

13 Jul '09

I've found the Date Time library incredibly useful for dealing with timestamps, but I can't seem to get the output formatted the way I want. I've followed the example for the Date Time IO Tutorial (http://www.boost.org/doc/libs/1_39_0/doc/html/date_time/date_time_io.html#d…) but the output always comes out the same way. I've tried the following code with Visual Studio Express 2008 and g++ 4.2 on Solaris 10. I'm using Boost 1.39.0. Any help appreciated. matthew #include <fstream> #include <functional> #include <iostream> #include <sstream> #include "boost/date_time/gregorian/gregorian.hpp" #include "boost/date_time/posix_time/posix_time.hpp" #include "boost/date_time/local_time/local_time.hpp" using namespace std; int main(int argc, char** argv) { stringstream ss; ifstream in( argv[1] ); string inputFormat = argv[2]; string outputFormat = argv[3]; //I want my own formatting. boost::local_time::local_time_facet* output_facet = new boost::local_time::local_time_facet(); boost::local_time::local_time_input_facet* input_facet = new boost::local_time::local_time_input_facet(); ss.imbue(locale(locale::classic(), output_facet)); ss.imbue(locale(ss.getloc(), input_facet)); output_facet->format( outputFormat.c_str() ); input_facet->format( inputFormat.c_str() ); while ( !in.eof() ) { string s; getline( in, s ); ss<<s; boost::posix_time::ptime p; ss>>p; //This works fine. string s1 = boost::posix_time::to_simple_string(p); cout<<s1<<"\n"; ss.str(""); ss<<p; //I don't get my format. string s2 = ss.str(); cout<<s2<<"\n"; std::ws(in); ss.str(""); } } ----Input File---- 05:01:2007_23:08:02 06:01:2007_23:09:04 07:01:2007_16:32:58 07:01:2007_18:51:42 07:01:2007_19:51:27 ----Output---- 2007-Jan-05 23:08:02 2007-Jan-05 23:08:02 2007-Jan-06 23:09:04 2007-Jan-06 23:09:04 2007-Jan-07 16:32:58 2007-Jan-07 16:32:58 2007-Jan-07 18:51:42 2007-Jan-07 18:51:42 2007-Jan-07 19:51:27 2007-Jan-07 19:51:27

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[statechart] Access to asynchronous_state_machine
by Bill Clark 13 Jul '09

13 Jul '09

We're using an asynchronous state machine. You can't construct these directly; you have to create them indirectly using a scheduler. Is there any "official" way to get access to the state machine after it's constructed? Or, alternatively, is there a way to pass a parameter to its constructor? The scenario I have in mind is one where the client needs to supply the state machine with some information at run time, ideally immediately upon construction, but in any case before any reactions occur. So far I have not found an easy way for the client to get access to the state machine itself. I can work around this by assuming that the state machine is a singleton, and setting a publicly visible static instance pointer. But this is far from ideal. Is there a better way? Thanks, Bill

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POD boost aligned storage?
by Joseph Garvin 13 Jul '09

13 Jul '09

I was trying to figure out if boost::aligned_storage was POD so I looked at the header. It looks like the internal implementation type is a POD, but the actual aligned_storage itself is not. However, that implementation type is exposed through a public typedef. Is it safe for me to use the typedef if I really do need a POD type and don't mind losing the safety of being noncopyable? Is opting out of that tradeoff what the typedef is there for?

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