October 2008 - Boost - lists.preview.boost.org

Newbie want to get involved in boost projects and prepare for 2009 GSoC
by 徐兴军 18 Oct '08

18 Oct '08

Hi,all: I am a graduate student, and good at algorithm. If I want to get involved in boost projects and prepare for 2009 GSoC, which specific projects are suitable for me ? And how can I get started ? Thank you !

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Re: [boost] [asio] [bind] ambiguous bind templates for asio::write() and asio::read()
by Gregory Dai 18 Oct '08

18 Oct '08

*code:* .... asio::streambuf response; size_t siz = asio::read(sslSock, response); .... *compilation error (g++ 3.4.6 on RHEL4):* asio/1.3.0/asio/impl/read.ipp:107: instantiated from `size_t asio::read(SyncReadStream&, asio::basic_streambuf<Allocator>&) [with SyncReadStream = asio::ssl::stream<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> >, asio::ssl::stream_service>, Allocator = std::allocator<char>]' asio/1.3.0/asio/ssl/detail/openssl_stream_service.hpp:415: error: call of overloaded `bind(int (*)(SSL*, void*, int), boost::arg<1>, void*, int)' is ambiguous boost/1.36/boost/bind.hpp:1298: note: candidates are: boost::_bi::bind_t<R, F, typename boost::_bi::list_av_3<A1, A2, A3>::type> boost::bind(F, A1, A2, A3) [with R = int, F = int (*)(SSL*, void*, int), A1 = boost::arg<1>, A2 = void*, A3 = int] boost/1.36/boost/bind/bind_cc.hpp:47: note: boost::_bi::bind_t<R, R (*)(B1, B2, B3), typename boost::_bi::list_av_3<A1, A2, A3>::type> boost::bind(R (*)(B1, B2, B3), A1, A2, A3) [with R = int, B1 = SSL*, B2 = void*, B3 = int, A1 = boost::arg<1>, A2 = void*, A3 = int] Also, asio::write(sslSock, response); resulted in a similar error.

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[proto] reorganized users' guide
by Eric Niebler 18 Oct '08

18 Oct '08

I've just completed a major reorg of Proto's docs, with significant portions clarified or completely rewritten. I intend to merge these changes to the release branch soon. I encourage any and all interested parties to click around and offer feedback. The purpose of the reorg was to make the users' guide more approachable and less reference-y. It takes the view that a library built with Proto is a compiler for a DSEL, and as such it has 3 parts: front-end, intermediate form, and back-end. The guide is organized accordingly. You can find the new guide here: http://boost-sandbox.sourceforge.net/libs/proto/doc/html/index.html TIA, -- Eric Niebler BoostPro Computing http://www.boostpro.com

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thread build on solaris
by Edward Peschko 18 Oct '08

18 Oct '08

All, I'm trying to compile a thread with the boost, threading libraries, and am getting errors like these. gcc -o conftest -g -O2 -I/GAAL/pesced_release/install/fuego/include/boost-1_36 -L/GAAL/pesced_release/install/fuego/lib /tmp/aa.c -lboost_thread-gcc43-mt /GAAL/pesced_release/install/fuego/lib/libboost_thread-gcc43-mt.so: undefined reference to `__cxa_allocate_exception(a)CXXABI_1.3' /GAAL/pesced_release/install/fuego/lib/libboost_thread-gcc43-mt.so: undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Rep::_M_destroy(std::allocator<char> const&)(a)GLIBCXX_3.4' /GAAL/pesced_release/install/fuego/lib/libboost_thread-gcc43-mt.so: undefined reference to `std::bad_alloc::~bad_alloc()@GLIBCXX_3.4' /GAAL/pesced_release/install/fuego/lib/libboost_thread-gcc43-mt.so: undefined reference to `__cxa_throw(a)CXXABI_1.3' This is on solaris 2.10, using gnu ld (version 2.18..) Any ideas on how to get around this? Ed

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Re: [boost] Measuring compile time performance
by dan marsden 17 Oct '08

17 Oct '08

Steven Watanabe wrote: >Joel de Guzman wrote: >> time is good enough for benchmarking. OTOH, Steven's perl sript >> is nice because it can (as he says) actually gather info when >> templates are being instantiated. I haven't used it yet, but it >> seems to be just the tool we need for profiling templates. >> Steven, please tell us more about your script. > >The scripts are actually a combination of bjam + perl + C++. > >At the moment, the only thing that it does reliably is to >count the number of times each template is instantiated. > >A month or two ago, I tried to make it produce a gprof-like >call graph by parsing the instantiation backtraces, but it >doesn't really work, and I broke gcc support in the process. >Hmmm, I'll try to fix this over fall break. Thanks Steven, that would be great. We'd certainly be interested in trying what you've got on Fusions compile time performance tests. Thanks to everyone else that provided ideas on this. Dan Send instant messages to your online friends http://uk.messenger.yahoo.com

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[asio] One more asio::ip::tcp::iostream question
by Gregory Dai 17 Oct '08

17 Oct '08

Does asio::ip::tcp::iostream support HTTPS? I'm very happy that it works for me using HTTP.

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[algorithm][string] regex_finder examples
by Robert Dailey 17 Oct '08

17 Oct '08

Hi, I noticed that there are no examples for using regex_finder with find_iterator. I checked the test & example directories in libs, and also the documentation. I found nothing useful. Could someone provide a quick example? So far here is what I have, but it does not compile: *#include <iostream> #include <string> #include <boost/algorithm/string.hpp> #include <boost/algorithm/string_regex.hpp> #include <boost/regex.hpp> int main() { std::string queryKey = "/foo/bar//stuff/"; boost::find_iterator<std::string::iterator> keyIt( queryKey, boost::regex_finder( boost::regex( "/.*?" ) ) ); boost::find_iterator<std::string::iterator> end; for( ; keyIt != end; ++keyIt ) { std::cout << "\"" << *keyIt << "\"\t" << (*keyIt).size() << std::endl; } std::cout << std::endl; system( "pause" ); return 0; }*

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[date_time] Library status?
by Andrey Semashev 17 Oct '08

17 Oct '08

The Boost.DateTime library is very useful, and it is unfortunate to admit that according to Trac report and personal experience, its current state is anything but good. There are long standing tickets, some of them are trivial to fix and have patches already attached. The most annoying ones are missing includes and name clashes (tickets 642, 1740, 1615, 2083, 2091 to name some of them). Is this library still maintained?

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[Range] boost::begin() & end( ) for istream?
by Robert Jones 17 Oct '08

17 Oct '08

Is there any mechanism to have the boost.range algorithms iterate over a stream? Given typedef std::istream_iterator<int> in; std::for_each( in(std::cin), in(), std::cout << (_1 * 3) << " " ); can I write this using range algorithms? - Thanks, Rob.

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[UUID] version v12
by Johannes Brunen 17 Oct '08

17 Oct '08

Hello Andy, I just did a small test with the latest uuid library from the vault. IMHO, I found a small error in file uuid.hpp (line 303): function hash_value must be inlined as it is not a template function. Additional is seems that the documentation is out of sync with the implementation. The section 'design notes' is still refering to a former implementation with the create(...) functions. Otherwise, I could compile and link the code on msvc .net 2008 with my setup. thanks for your library, best Johannes

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