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

PDF of 1.39.0 documentation available?
by Ingolf Steinbach 08 Jul '09

08 Jul '09

Hi, is the documentation for release 1.39.0 available as PDF for download? (Maybe I have overlooked it on the web page...) Kind regards Ingolf

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unit test: apply same test case to different fixtures
by Hicham Mouline 08 Jul '09

08 Jul '09

I have auto test cases that can take fixtures whose members they access in a uniform way. Say struct F1... Fn BOOST_FIXTURE_TEST_CASE( test_case1 , F1 ... Fn ) { //same code for all Fi } Is there a way to do this? Regards,

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Boost Test - Customize output.
by mik 08 Jul '09

08 Jul '09

Hi all, I'm using Boost::Test to build a regression test of a library and it's working well. But I'd like to customize the output. For example, I get: c:/REPOSI~1/Stable/pdglib/libs/forex/OPTION~1/test/src/option_test_case.cpp(83): error in "option_test_case::regression": american (38) - reference lib (foreign_rho): -1.#IND new lib (foreign_rho): 0 The information about the file and number of line are unnecessary. How can I suppress it? And is it possible to customize the final report too? Thank you, Mirko Cambi

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[Boost.Test] C++ Unit Tests with Boost.Test, Part 1
by legalize+jeeves＠mail.xmission.com 08 Jul '09

08 Jul '09

[Please do not mail me a copy of your followup] <http://legalizeadulthood.wordpress.com/2009/07/04/c-unit-tests-with-boost-t…> In this post, I will describe how to start making unit tests in C++ with Boost.Test. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

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functional/hash and mp_math weirdness
by Andrea Bedini 07 Jul '09

07 Jul '09

Hello, I'm experiencing troubles with functional/hash #include <boost/functional/hash.hpp> #include <boost/mp_math/integer.hpp> typedef boost::mp_math::integer<> big_integer; class A { friend A operator*( const big_integer& lhs, const A& rhs ) {} }; gives the following madness. What surprises me is that I am not making any use of functional/hash (in the actual code, it gets included from boost/unordered_map.hpp), as the error messages don't indicate any line of my code. I think mp_math is not playing a big role here, once I had the same problem with a homemade class (but unfortunately I can't now replicate the same conditions). Can anyone explain me what is going on here ? Thanks you all in advice, Andrea /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp: In instantiation of 'boost::detail::static_log2_impl::static_log2_impl<2ul, 16>': /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp:117: instantiated from 'boost::static_log2<2ul>' /home/andrea/boost_1_39_0/boost/functional/hash/detail/hash_float.hpp:150: instantiated from 'size_t boost::hash_detail::float_hash_impl(T) [with T = float]' /home/andrea/boost_1_39_0/boost/functional/hash/detail/hash_float.hpp:187: instantiated from 'size_t boost::hash_detail::float_hash_value(T) [with T = float]' /home/andrea/boost_1_39_0/boost/functional/hash/hash.hpp:304: instantiated from here /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp:89: error: 'boost::detail::static_log2_impl::static_log2_impl<2ul, 16>::<anonymous enum>' is/uses anonymous type /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp:89: error: trying to instantiate 'template<class Type> template<class T1> boost::mp_math::integer::integer(const T1&)' /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp: In instantiation of 'boost::detail::static_log2_impl::static_log2_impl<2ul, 8>': /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp:89: instantiated from 'boost::detail::static_log2_impl::static_log2_impl<2ul, 16>' /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp:117: instantiated from 'boost::static_log2<2ul>' /home/andrea/boost_1_39_0/boost/functional/hash/detail/hash_float.hpp:150: instantiated from 'size_t boost::hash_detail::float_hash_impl(T) [with T = float]' /home/andrea/boost_1_39_0/boost/functional/hash/detail/hash_float.hpp:187: instantiated from 'size_t boost::hash_detail::float_hash_value(T) [with T = float]' /home/andrea/boost_1_39_0/boost/functional/hash/hash.hpp:304: instantiated from here /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp:89: error: 'boost::detail::static_log2_impl::static_log2_impl<2ul, 8>::<anonymous enum>' is/uses anonymous type /home/andrea/boost_1_39_0/boost/integer/static_log2.hpp:89: error: trying to instantiate 'template<class Type> template<class T1> boost::mp_math::integer::integer(const T1&)' ... ...

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[Signals2] Signal disconnect wrapper won't work
by Marc dela Cruz 07 Jul '09

07 Jul '09

Hopefully this is not another simple oversight on my part but I have code like below and the disconnect wrapper does not work. Thanks. typedef boost::signals2::signal<void ()> VoidSignal; typedef VoidSignal::slot_type VoidSlot; class x{ public: void somefuncA() { cerr << "Bada bing" << endl; } void somefuncB() { cerr << "Bada boom " << endl; } }; void disconnect(VoidSlot const& rF, VoidSignal& rSig) { rSig.disconnect(rF); //won't compile //rSig.disconnect(&rF); //compiles but doesn't disconnect } int main() { x myX; VoidSignal sig; sig.connect(VoidSlot(&x::somefuncB, &myX)); disconnect(VoidSlot(&x::somefuncB, &myX, sig); //doesn't work/compile as expected disconnect(boost::bind(&x::somefuncB, &myX, sig); //doesn't work/compile either sig(); // will still invoke somefuncB return 0; }

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[test] How do run a specific test suite?
by Christian Henning 07 Jul '09

07 Jul '09

Hi there, I believe I once read that one can specify test suite to be run as a command line parameter. By default all test suites are running, but, the user should be able to specify one in the case there are several suites. I've tried to look up that information inside the boost::test documentation but couldn't find it. Am I wrong that such functionality exists? Regards, Christian

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[Asio]How to peocess signal with asio?
by sjdf 07 Jul '09

07 Jul '09

//---------------------------------------------------------------------------- // Hi all, // I have a program like below. // Two questions: // 1. The program can process multi connections, each connection is a // session that has some states. The program should catch signal SIGINT // and SIGTERM, then each session should do different actions according to // their state. But how to do this? Does it have to have a connection // manager? // // 2. When the function Server::handle_accept is called, a SessionController // object will be created. The constructor of SessionController will apply for // some resource, if failed, the constructor would throw an exception. // So, if there is an exception thrown, what should we do? I don't want to // exit the process, may be the resource will be available after some seconds, // then I hope the program continue to accept new connections. //---------------------------------------------------------------------------- class SessionController; typedef shared_ptr<SessionController> SessionController_Ptr; Server::Server(boost::asio::io_service& io_service) : io_service_(io_service), acceptor_(io_service, tcp::endpoint( boost::asio::ip::address::from_string("0.0.0.0"), 10001)) { SessionController_Ptr new_connection(new SessionController(io_service_)); acceptor_.async_accept(new_connection->socket(), boost::bind(&Server::handle_accept, this, new_connection, boost::asio::placeholders::error)); } //---------------------------------------------------------------------------- void Server::handle_accept(SessionController_Ptr new_connection, const boost::system::error_code& error) { if (!error) { new_connection->start(); try { new_connection.reset(new SessionController(io_service_)); acceptor_.async_accept(new_connection->socket(), boost::bind(&Server::handle_accept, this, new_connection, boost::asio::placeholders::error)); } catch (...) { // What should we do? } } }

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[Range.Ex / String.Algo] Ambiguous call to overload function "find"
by 梁绍池 07 Jul '09

07 Jul '09

I use vc 9.0 to compile the following code with boost 1.39.0 and range_ex. #include<string> #include<boost/algorithm/string.hpp> #include<boost/range/algorithm.hpp> int main() { std::string s = "hello"; boost::find_first(s, "lo"); return 0; } The compiler will complain ambiguous call to overload function "find". I found there's also a "find" in boost/range/algorithm.hpp. Even worse when I change the type of "s" to const std::string, the compiler will resolute "find" call as the one in boost/range/algorithm.hpp and reports an error "const_iterator is not a member of std::_String_const_iterator". Now I just indicated the "find" call in boost::find_first explicitly. Is there a better way to solve it? Thanks! S.C. Leung

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[Signals2] Compile error saying slot_type is not a type
by Marc DelaCruz 07 Jul '09

07 Jul '09

Hi all, I'm new to boost and I get the following compile error: ~/FileDesc.h:254: error: `class boost::signals2::signal<void ()(ProcessKit::FileDescBase&, M&), boost::signals2::optional_last_value<typename boost::function_traits<void ()(ProcessKit::FileDescBase&, M&)>::result_type>, int, std::less<int>, boost::function<void ()(ProcessKit::FileDescBase&, M&)>, typename boost::signals2::detail::extended_signature< boost::function_traits<void ()(ProcessKit::FileDescBase&, M&)>::arity, void ()(ProcessKit::FileDescBase&, M&)>::function_type, boost::signals2::mutex>::slot_type' is not a type ~/FileDesc.h:255: error: ISO C++ forbids declaration of `rReadSlot' with no type I have code like the following: template<typename M> class FileDesc : public FileDescBase { ... void setReadCallBack( boost::signals2::signal<void ( FileDescBase&, M&) >::slot_type const& rReadSlot) { ... } ... boost::signals2::signal<void ( FileDescBase&, M&) > mReadSignal; }; I have a feeling it has to do with how/when the templates and the metaprogramming stuff gets "unrolled/expanded" during compile time. However I really don't understand the metaprogramming stuff yet. Thanks.

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