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

Problem trying to load XML archive
by Thomas D'Silva 03 Oct '06

03 Oct '06

Hello, I am trying to save and load a vector<map<string,map<string,int> > > to an axml archive. I am able to save the xml archive properly, but I cannot read the saved archive. I have examined the XML file that is generated and it does not seem to have any errors. I get the following assertion error when I try to load the file. Any help would be appreciated. Thank you, Thomas /include/boost/serialization/collections_load_imp.hpp:69: void boost::serialization::stl::… [View More]

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[multi_index] How to iterate by user selected index
by René Haber 03 Oct '06

03 Oct '06

Hello, I'm looking for an easy way to iterate over a set by a user selected index. A little example: [code] struct Person { std::string name; std::string city; }; struct city{}; struct name{}; typedef multi_index_container< Person, indexed_by< ordered_unique< tag<name>, member<Person, std::string, &Person::name> >, ordered_non_unique< tag<city>, member<Person, std::string, &Person::city> > > > person_set; … [View More]

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Boost 1.33.1: boost::regex() constructor is not threadsafe
by p.klotz＠icoserve.com 03 Oct '06

03 Oct '06

A simple multithreaded application using 100 threads where each thread executes the following loop results in exceptions thrown by the boost::regex() constructor: for (int i=0;i<1000;++i) boost::regex("[a-z]{1}"); The exceptions thrown are either "Invalid content of repeat range" or "Unmatched { or \{". Since the regular expression used is valid and does not throw when executed in a single threaded environment I expect some static variable to be used by BoostRegex internally. Should … [View More]

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[xpressive] Two problems with nested_results
by David Jenkins 03 Oct '06

03 Oct '06

I've been using Xpressive and think it's great. But, I think the following program shows two problems. Problem 1: You get a runtime error if you uncomment the line "std::wcout << what2.position(0) << L'\n';" Problem 2: I think it should output: This is my face is my face But it actually outputs: This is is Note that if you replace the nested regular expression with the (commented out) non-nested one, it still outputs the wrong thing. It outputs "This is" instead of "This is … [View More]

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auto_link question
by Robert Ramey 03 Oct '06

03 Oct '06

When I build the serialization library I get two copies of the diagnostic message. I asked this before but now I can't find the answer. It seems that it was suggested that this was symptom of some sort of mistake that could/should be corrected. In studying this I've come upon the following scenario. library ab contains a.cpp - with interface in a.hpp b.cpp - with interface in b.hpp User programs might contain a.hpp or b.hpp or both depending on what they want to call. So each of a.hpp … [View More]

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[program_options] undefined reference using mingw
by Johan Simon Seland 03 Oct '06

03 Oct '06

Hello all. I am trying to port a C++ program developed on Linux/g++ to Windows using MinGW. Boost was a joy to compile using MinGW and bjam and my program compiles fine, but failes during linking. The offending function calls seem to be two calls to program_options::store: po::store(po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm); po::store(po::parse_command_line(argc, argv, desc), vm); Commenting out these two lines makes my program compile, but without … [View More]parsing the command line of course. This problem seems to be related to mingw lacking wchar support. Apparently, Valadimir Prus made some patches for this in 2004. http://aspn.activestate.com/ASPN/Mail/Message/boost/2082829 I have recompiled program_options with his patched, but to no avail. Is anyone successfully using program_options using mingw? "H:\Program Files\CMake 2.4\bin\cmake.exe" -P CMakeFiles\rewrite.dir\cmake_clean _target.cmake h:\mingw\bin\g++.exe -O3 -DNDEBUG "CMakeFiles/rewrite.dir/src/rewrite.obj" "CMakeFiles/rewrite.dir/src/DyadicTrianglesVBO.obj" "CMakeFiles/rewrite.dir/src /HistoPyramid.obj" "CMakeFiles/rewrite.dir/src/BasisFuncTexture.obj" "CMakeFiles /rewrite.dir/src/BasisFunctions.obj" "CMakeFiles/rewrite.dir/src/ShaderSource.ob j" "CMakeFiles/rewrite.dir/src/Utility.obj" "CMakeFiles/rewrite.dir/src/Animate. obj" "CMakeFiles/rewrite.dir/src/CubicBezierCoefficients.obj" "CMakeFiles/rewrit e.dir/src/DataStructures.obj" MakeFiles/rewrite.dir/src/ImportSff.obj" -o re write.exe -Lh:\DOCUME~1\JOHANS~1\WORKSP~1\shallows -Lh:\DOCUME~1\JOHANS~1\WORKS P~1\libdyk -Lh:\local\lib -Lh:\boost\lib -lshallows -ldyk -lglu32 -lopengl32 -lg lut32 -lglew32 -lboost_program_options-mgw -lboost_regex-mgw Info: resolving vtable for boost::program_options::validation_errorby linking to __imp___ZTVN5boost15program_options16validation_errorE (auto-import) Info: resolving boost::program_options::arg by linking to __imp___ZN5boost1 5program_options3argE (auto-import) Info: resolving vtable for boost::program_options::variables_mapby linking to __ imp___ZTVN5boost15program_options13variables_mapE (auto-import) Info: resolving boost::re_detail::cpp_regex_traits_implementation<char>::init(): :null_string by linking to __imp___ZZN5boost9re_detail31cpp_regex_traits_imple mentationIcE4initEvE11null_string (auto-import) Info: resolving boost::object_cache<boost::re_detail::cpp_regex_traits_base<char >, boost::re_detail::cpp_regex_traits_implementation<char> > >::do_get(boost::re_d etail::cpp_regex_traits_base<char> const&, unsigned int)::s_databy linking to __ imp___ZZN5boost12object_cacheINS_9re_detail21cpp_regex_traits_baseIcEENS1_31cpp_ regex_traits_implementationIcEEE6do_getERKS3_jE6s_data (auto-import) Info: resolving boost::cpp_regex_traits<char>::get_catalog_name_inst()::s_name by linking to __imp___ZZN5boost16cpp_regex_traitsIcE21get_catalog_name_instEvE 6s_name (auto-import) CMakeFiles/rewrite.dir/src/rewrite.obj:rewrite.cpp:(.text$_ZN5boost15program_opt ions25basic_command_line_parserIcE7optionsERKNS0_19options_descriptionE[boost::p rogram_options::basic_command_line_parser<char>::options(boost::program_options: :options_description const&)]+0x1a): undefined reference to `boost::program_opti ons::detail::cmdline::set_options_description(boost::program_options::options_de scription const&)' CMakeFiles/rewrite.dir/src/rewrite.obj:rewrite.cpp:(.text$_ZN5boost15program_opt ions25basic_command_line_parserIcE10positionalERKNS0_30positional_options_descri ptionE[boost::program_options::basic_command_line_parser<char>::positional(boost ::program_options::positional_options_description const&)]+0x15): undefined refe rence to `boost::program_options::detail::cmdline::set_positional_options(boost: :program_options::positional_options_description const&)' CMakeFiles/rewrite.dir/src/rewrite.obj:rewrite.cpp:(.text$_ZN5boost15program_opt ions25basic_command_line_parserIcE5styleEi[boost::program_options::basic_command _line_parser<char>::style(int)]+0x15): undefined reference to `boost::program_op tions::detail::cmdline::style(int)' CMakeFiles/rewrite.dir/src/rewrite.obj:rewrite.cpp:(.text$_ZN5boost15program_opt ions25basic_command_line_parserIcE12extra_parserENS_9function1ISt4pairISsSsERKSs SaINS_13function_baseEEEE[boost::program_options::basic_command_line_parser<char >::extra_parser(boost::function1<std::pair<std::basic_string<char, >std::char_tra its<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char >, std::allocator<char> > >, std::basic_string<char, std::char_traits<char>, >std ::allocator<char> > const&, std::allocator<boost::function_base> >)]+0x75): unde fined reference to `boost::program_options::detail::cmdline::set_additional_pars er(boost::function1<std::pair<std::string, std::string>, std::string const&, std ::allocator<boost::function_base> >)' CMakeFiles/rewrite.dir/src/rewrite.obj:rewrite.cpp:(.text$_ZN5boost15program_opt ions25basic_command_line_parserIcEC1EiPPc[boost::program_options::basic_command_ line_parser<char>::basic_command_line_parser(int, char**)]+0x91): undefined refe rence to `boost::program_options::detail::cmdline::cmdline(std::vector<std::stri ng, std::allocator<std::string> > const&)' CMakeFiles/rewrite.dir/src/rewrite.obj:rewrite.cpp:(.text$_ZN5boost15program_opt ions25basic_command_line_parserIcE3runEv[boost::program_options::basic_command_l ine_parser<char>::run()]+0x7c): undefined reference to `boost::program_options:: detail::cmdline::run()' collect2: ld returned 1 exit status mingw32-make[2]: *** [rewrite.exe] Error 1 mingw32-make[2]: Leaving directory `H:/Documents and Settings/Johan Simon Seland /workspace/gpusilhouette' mingw32-make[1]: *** [CMakeFiles/rewrite.dir/all] Error 2 mingw32-make[1]: Leaving directory `H:/Documents and Settings/Johan Simon Seland /workspace/gpusilhouette' mingw32-make: *** [all] Error 2 [View Less]

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Re: [Boost-users] bind/function: composition
by Johan Torp 03 Oct '06

03 Oct '06

Monday, October 2, 2006, 10:05:23 PM, you wrote: burlbo> Johan Torp wrote: >> I often tend to have interfaces which take a boost::function<void()> >> that is to be called when an event occurs. Quite often I need make two >> separate function calls as response to one event. In these cases I >> usually solve the problem using the following technique: >> >> void foo(); >> void bar(); >> >> void call_two(const boost::function<void … [View More]

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Re: [Boost-users] [BGL] Boost poor performance (against LEDA)
by Sohail Somani 02 Oct '06

02 Oct '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Leandro Melo > Sent: Monday, October 02, 2006 3:38 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] [BGL] Boost poor performance (against LEDA) > > Ok Sohail. I agree with that. So we may be all talking the same thing > but in different words. > The way you formulate your sentence is very nice. Hey thanks!! … [View More]

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Re: [Boost-users] [BGL] Boost poor performance (against LEDA)
by Sohail Somani 02 Oct '06

02 Oct '06

> -----Original Message----- > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Leandro Melo > > Hi David. > I think there's a misunderstanding here. I believe that I know many of > the benefits of Generic Programming. But my poiny is that I don't > agree that algorithms implemented generically can be considered to be > faster just because of that. No, but its easier to make algorithms faster because of it. It ends up almost working like multiple dispatch. I'm … [View More]

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Whitespace ins boost::filesystem::path
by shookie＠email.de 02 Oct '06

02 Oct '06

All I want to know is, wether there is a specific reason the path class can't deal with a normal space in any path. path p("a b"); throws filesystem errors. I'd like to point out, that this omission basically defeats the purpose of this library to be usabel cross-platform, since the two most used systems have directory names with spaces in it for very commonly used paths. Neither windows with "My Documents" or "Program Files" nor OS X with "Application Support" will allow to use the boost::… [View More]

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