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[exception] Passing existing exception hierarchies between threads
by Szymon Gatner 02 Jul '12

02 Jul '12

Hi, I am trying to pass Poco::Exeption from worker thread to a client thread/future. Idea is simple: try { operationThatMyThrowPocoException(); } catch (const Poco::Exception& e) { // rethrow with exception_ptr support so can be passed between threads BOOST_THROW_EXCEPTION(e); } but this causes compilation error because Poco::Exception defines clone() method on its own: error C2555: 'boost::exception_detail::clone_impl<T>::clone': overriding virtual function return type differs and is not covariant from 'Poco::Exception::clone' c:\devel\boost_1_50_0\boost\exception\exception.hpp 468 Is there a way to use BOOST_THROW_EXCEPTION / enable_current_exception() with existing exception hierarchies that define clone() already? Regards, Szymon -- Szymon Gatner The Lordz Games Studio www.thelordzgamesstudio.com

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Compilations problem when including boost/spirit/include/qi.hpp
by Allan Nielsen 02 Jul '12

02 Jul '12

Hi, I'm trying to use boost spirit for an embedded application running on mips32 hardware, compiled with a gcc 4.6.3 toolchain. The toolchain is build with newlib and libstdc++ with -fno-exceptions. When I try to include iq.hpp I get the following compiler error. In file included from /data/anielsen/boost_1_49_0/boost/spirit/home/support/utf8.hpp:17:0, from /data/anielsen/boost_1_49_0/boost/spirit/home/support/info.hpp:18, from /data/anielsen/boost_1_49_0/boost/spirit/home/qi/domain.hpp:16, from /data/anielsen/boost_1_49_0/boost/spirit/home/qi/meta_compiler.hpp:15, from /data/anielsen/boost_1_49_0/boost/spirit/home/qi/action/action.hpp:14, from /data/anielsen/boost_1_49_0/boost/spirit/home/qi/action.hpp:14, from /data/anielsen/boost_1_49_0/boost/spirit/home/qi.hpp:14, from /data/anielsen/boost_1_49_0/boost/spirit/include/qi.hpp:16, from ../../vtss_appl/misc/string.cxx:5: /data/anielsen/boost_1_49_0/boost/type_traits/make_unsigned.hpp: In instantiation of ‘boost::detail::make_unsigned_imp<wchar_t>’: /data/anielsen/boost_1_49_0/boost/type_traits/make_unsigned.hpp:130:1: instantiated from ‘boost::make_unsigned<wchar_t>’ /data/anielsen/boost_1_49_0/boost/spirit/home/support/utf8.hpp:35:52: instantiated from ‘boost::spirit::utf8_string boost::spirit::to_utf8(Char) [with Char = wchar_t, boost::spirit::utf8_string = std::basic_string<char>]’ /data/anielsen/boost_1_49_0/boost/spirit/home/support/info.hpp:54:42: instantiated from here /data/anielsen/boost_1_49_0/boost/type_traits/make_unsigned.hpp:39:1: error: invalid application of ‘sizeof’ to incomplete type ‘boost::STATIC_ASSERTION_FAILURE<false>’ I do know that this is not the most typical setup, but I have had other problems which was solved just by adding a define, or avoid an include file. Any hints will be appreciated Regards Allan W. Nielsen

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Boost Graph library migration 1.48 => 1.49 (1.50)
by Gregory 02 Jul '12

02 Jul '12

Hi, All! I am newbie in boost. The code fragment compiled without errors with boost 1.48.0 in MS Visual Studio 2008 , but returns compiler error with boost 1.49 and 1.50 : error C2784: 'E boost::detail::get(boost::detail::underlying_edge_desc_map_type<E>, const boost::detail::reverse_graph_edge_descriptor<EdgeDesc> &)' : could not deduce template argument for 'boost::detail::underlying_edge_desc_map_type<E>' from 'double *' c:\program files\boost\boost_1_50_0\boost\graph\dijkstra_shortest_paths.hpp 140 . typedef boost::adjacency_list<vecS,vecS,directedS, no_property, property < edge_weight_t, double > > Graph; Graph g(100); typedef graph_traits < Graph >::vertex_descriptor vertex_descriptor; typedef graph_traits< Graph >::edge_descriptor edge_descriptor; property_map< Graph, edge_weight_t>::type weightmap = get(edge_weight, g); /* graph filling code */ std::vector<vertex_descriptor> predesessor(num_vertices(g)); std::vector<double> distances(num_vertices(g)); vertex_descriptor startV = vertex(startIx, g); property_map<Graph, vertex_index_t>::type indexmap = get(vertex_index, g); dijkstra_shortest_paths(g,startV,&predesessor[0],&distances[0], weightmap, indexmap, std::less<double>(), closed_plus<double>(), (std::numeric_limits<double>::max)(), 0, default_dijkstra_visitor()); WBW&R, Gregory

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statechart XCode 4.5 compilation error
by Антон Бычков 02 Jul '12

02 Jul '12

Hi. The following source code does not compile in XCode 4.5 (it is developer preview 2 version at this moment). I've got answer from one of the apple guys: "It's a known issue that when using libc++ in C++11 mode, instantiating std::list causes instantiation of the element type more aggressively than other std::list implementations. This probably won't be fixed for Xcode 4.5." Source code: #include <functional> #include <iostream> #include <boost/statechart/state.hpp> #include <boost/statechart/state_machine.hpp> class InitialState; class StateMachine : public boost::statechart::state_machine<StateMachine, InitialState> { public: StateMachine() { } }; class InitialState : public boost::statechart::simple_state<InitialState, StateMachine> { public: InitialState() { } }; int main(int argc, char const* argv[]) { std::cout << "Hello, World!\n"; StateMachine s; return 0; } Errors: In file included from /Users/developer/Downloads/Sandbox/Sandbox/main.cpp:12: In file included from /usr/local/boost_1_50_0/boost/statechart/state.hpp:11: In file included from /usr/local/boost_1_50_0/boost/statechart/simple_state.hpp:13: /usr/local/boost_1_50_0/boost/statechart/detail/leaf_state.hpp:26:27: error: base class has incomplete type class leaf_state : public state_base< Allocator, RttiPolicy > ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:1889:54: note: in instantiation of template class 'boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>' requested here decltype(_VSTD::move(_Tp(_VSTD::declval<_Args>()...)), true_type()) ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:1890:1: note: while substituting deduced template arguments into function template '__is_constructible_test' [with _Tp = std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>>, _Args = <no value>] __is_constructible_test(_Tp&&, _Args&& ...); ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:1949:14: note: in instantiation of template class 'std::__1::__is_constructible<false, std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>>, std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>> &&>' requested here : public __is_constructible<is_scalar<_Tp>::value || is_reference<_Tp>::value, ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:1975:14: note: in instantiation of template class 'std::__1::__is_constructible_void_check<false, std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>>, std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>> &&>' requested here : public __is_constructible_void_check<__contains_void<_Tp, _Args...>::value ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:2455:34: note: in instantiation of template class 'std::__1::is_constructible<std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>>, std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>> &&>' requested here : __is_nothrow_constructible<is_constructible<_Tp, _Args...>::value, _Tp, _Args...> ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:2590:14: note: (skipping 3 contexts in backtrace; use -ftemplate-backtrace-limit=0 to see all) : public is_nothrow_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/list:513:52: note: in instantiation of template class 'std::__1::__compressed_pair<unsigned long, std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>>>' requested here __compressed_pair<size_type, __node_allocator> __size_alloc_; ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/list:770:15: note: in instantiation of template class 'std::__1::__list_imp<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, std::__1::allocator<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>>>' requested here : private __list_imp<_Tp, _Alloc> ^ /usr/local/boost_1_50_0/boost/statechart/detail/state_base.hpp:139:16: note: in instantiation of template class 'std::__1::list<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, std::__1::allocator<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>>>' requested here typename state_list_type::iterator & statesEnd, ^ /usr/local/boost_1_50_0/boost/statechart/state_machine.hpp:510:22: note: in instantiation of template class 'boost::statechart::detail::state_base<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>' requested here typedef typename state_base_type::node_state_base_ptr_type ^ /Users/developer/Downloads/Sandbox/Sandbox/main.cpp:17:29: note: in instantiation of template class 'boost::statechart::state_machine<StateMachine, InitialState, std::__1::allocator<void>, boost::statechart::null_exception_translator>' requested here class StateMachine : public boost::statechart::state_machine<StateMachine, InitialState> ^ /usr/local/boost_1_50_0/boost/statechart/detail/state_base.hpp:57:7: note: definition of 'boost::statechart::detail::state_base<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>' is not complete until the closing '}' class state_base : ^ In file included from /Users/developer/Downloads/Sandbox/Sandbox/main.cpp:12: In file included from /usr/local/boost_1_50_0/boost/statechart/state.hpp:11: In file included from /usr/local/boost_1_50_0/boost/statechart/simple_state.hpp:13: /usr/local/boost_1_50_0/boost/statechart/detail/leaf_state.hpp:44:44: error: no type named 'iterator' in 'std::__1::list<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, std::__1::allocator<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>>>' typename base_type::state_list_type::iterator listPosition ) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~ /usr/local/boost_1_50_0/boost/statechart/detail/leaf_state.hpp:53:44: error: no type named 'iterator' in 'std::__1::list<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, std::__1::allocator<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>>>' typename base_type::state_list_type::iterator & statesEnd, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~ /usr/local/boost_1_50_0/boost/statechart/detail/leaf_state.hpp:73:42: error: no type named 'iterator' in 'std::__1::list<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, std::__1::allocator<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>>>' typename base_type::state_list_type::iterator listPosition_; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~ In file included from /Users/developer/Downloads/Sandbox/Sandbox/main.cpp:12: In file included from /usr/local/boost_1_50_0/boost/statechart/state.hpp:11: /usr/local/boost_1_50_0/boost/statechart/simple_state.hpp:505:27: error: no type named 'direct_state_base_ptr_type' in 'boost::statechart::detail::rtti_policy::rtti_derived_type<InitialState, boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>' typename base_type::direct_state_base_ptr_type & pSelf, ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ /Users/developer/Downloads/Sandbox/Sandbox/main.cpp:25:29: note: in instantiation of template class 'boost::statechart::simple_state<InitialState, StateMachine, boost::mpl::list<mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, 0>' requested here class InitialState : public boost::statechart::simple_state<InitialState, StateMachine> ^ In file included from /Users/developer/Downloads/Sandbox/Sandbox/main.cpp:12: In file included from /usr/local/boost_1_50_0/boost/statechart/state.hpp:11: In file included from /usr/local/boost_1_50_0/boost/statechart/simple_state.hpp:11: In file included from /usr/local/boost_1_50_0/boost/statechart/event.hpp:11: In file included from /usr/local/boost_1_50_0/boost/statechart/event_base.hpp:15: In file included from /usr/local/boost_1_50_0/boost/intrusive_ptr.hpp:16: /usr/local/boost_1_50_0/boost/smart_ptr/intrusive_ptr.hpp:96:23: error: no matching function for call to 'intrusive_ptr_release' if( px != 0 ) intrusive_ptr_release( px ); ^~~~~~~~~~~~~~~~~~~~~ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/memory:1621:23: note: in instantiation of member function 'boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy> >::~intrusive_ptr' requested here __p->~_Tp(); ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/memory:1522:14: note: in instantiation of function template specialization 'std::__1::allocator_traits<std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>> >::__destroy<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>> >' requested here {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);} ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/list:685:34: note: in instantiation of function template specialization 'std::__1::allocator_traits<std::__1::allocator<std::__1::__list_node<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, void *>> >::destroy<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>> >' requested here __node_alloc_traits::destroy(__na, _VSTD::addressof(__n.__value_)); ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/list:664:5: note: in instantiation of member function 'std::__1::__list_imp<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, std::__1::allocator<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>> >::clear' requested here clear(); ^ /Developer4/Xcode45-DP2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/list:769:23: note: in instantiation of member function 'std::__1::__list_imp<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>, std::__1::allocator<boost::intrusive_ptr<boost::statechart::detail::leaf_state<std::__1::allocator<void>, boost::statechart::detail::rtti_policy>>> >::~__list_imp' requested here class _LIBCPP_VISIBLE list ^ /Users/developer/Downloads/Sandbox/Sandbox/main.cpp:20:5: note: in instantiation of member function 'boost::statechart::state_machine<StateMachine, InitialState, std::__1::allocator<void>, boost::statechart::null_exception_translator>::state_machine' requested here StateMachine() ^ /usr/local/boost_1_50_0/boost/statechart/detail/state_base.hpp:165:13: note: candidate template ignored: failed template argument deduction inline void intrusive_ptr_release( ^ 6 errors generated. *** So, it looks like it became boost's problem. Any help? WBR, Anton.

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[statechart] history in the different state hierarchies
by Vlad Orlov 02 Jul '12

02 Jul '12

Hello everybody. I have a problem similar to the one described in the Statechart tutorial, but a little different. My state machine has two states (let's call them A and B) in the different state hierarchies and a third state C that can be transited to from either A or B. The transition from C must be done to either A or B, depending on where we came to C from. So I've decided to use the history. The difference between this problem and what's described in the tutorial is that A and B don't belong to the same composite state (they only belong to the same state machine). I can't simply declare "has_xxx_history" in the outer state like it's done in the tutorial. Here's what I've tried to do: #include <iostream> #include <boost/statechart/shallow_history.hpp> #include <boost/statechart/simple_state.hpp> #include <boost/statechart/state_machine.hpp> #include <boost/statechart/transition.hpp> namespace sc = boost::statechart; // events struct transfer_to_B : sc::event<transfer_to_B> {}; struct visit_C : sc::event<visit_C> {}; struct exit_to_history : sc::event<exit_to_history> {}; // forward declarations struct state_A; struct substate_A; struct substate_B; struct state_C; // state machine struct test_fsm : sc::state_machine<test_fsm, state_A> {}; // composite state A struct state_A : sc::simple_state<state_A, test_fsm, substate_A, sc::has_shallow_history> {}; struct substate_A : sc::simple_state<substate_A, state_A> { typedef boost::mpl::list < sc::transition<transfer_to_B, substate_B> , sc::transition<visit_C, state_C> > reactions; substate_A() { std::cout << "Entered A" << std::endl; } ~substate_A() { std::cout << "Exited A" << std::endl; } }; // composite state B struct state_B : sc::simple_state<state_B, test_fsm, substate_B, sc::has_shallow_history> {}; struct substate_B : sc::simple_state<substate_B, state_B> { typedef sc::transition<visit_C, state_C> reactions; substate_B() { std::cout << "Entered B" << std::endl; } ~substate_B() { std::cout << "Exited B" << std::endl; } }; // simple state C struct state_C : sc::simple_state<state_C, test_fsm> { typedef sc::transition < exit_to_history, sc::shallow_history<substate_A> > reactions; state_C() { std::cout << "Entered C" << std::endl; } ~state_C() { std::cout << "Exited C" << std::endl; } }; int main() { test_fsm fsm; fsm.initiate(); fsm.process_event(visit_C()); fsm.process_event(exit_to_history()); fsm.process_event(transfer_to_B()); fsm.process_event(visit_C()); fsm.process_event(exit_to_history()); } Unfortunately, this doesn't work as intended. The transition to history always leads to substate_A and never to substate_B: Entered A Exited A Entered C Exited C Entered A Exited A Entered B Exited B Entered C Exited C Entered A Exited A Can anyone please clarify if I've got something wrong or made a mistake somewhere? Is history supposed to work in the different state hierarchies?

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Program Options: What would be involved in implementing add_options()(optionNameWork, po::value<std::pair<int, float>>() ?
by Charles Mills 30 Jun '12

30 Jun '12

I really like Boost Program Options. I came up with this wild hare of being able to handle something like foo= int float Obviously, I could do it by instead using foo_int= int foo_float= float But what would be involved in being able to do something like add_options()(optionNameWork, po::value<std::pair<int, float>>() ? I would have to derive a class from boost::program_options::value_semantic? I would have to implement all of the abstract methods? The other classes also like abstract_variables_map? Or just variable_value? Volodya wrote in response to an earlier question "I would imagine this to be not hard. Either define operator>> for the class you use to represent rectangles, over override 'validate'" Is that what I should? Define operator>> for pair<int, float> ? Where is an example of a boost::program_options >> operator? Where is validate() declared? Sorry to be such a newbie at this level of C++ programming. You have to start somewhere. Charles

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Re: [Boost-users] [boost] Meeting C++ - Call for Papers
by Jens Weller 30 Jun '12

30 Jun '12

Hi, small update on this: As some people haved asked: The session length will be 45 minutes, some talks might extend to 90 min. There is now a form to submit your talk: http://meetingcpp.com/index.php/submit-your-talk.html Call for Papers should end at 15. July 2012 Tickets will also be available in July. regards, Jens Weller -------- Original-Nachricht -------- > Datum: Wed, 27 Jun 2012 16:45:54 +0200 > Von: Matus Chochlik <chochlik(a)gmail.com> > An: boost(a)lists.boost.org > Betreff: [boost] Meeting C++ - Call for Papers > On Wed, Jun 27, 2012 at 4:08 PM, Jens Weller <JensWeller(a)gmx.de> wrote: > > Dear C++/boost community! > > > > I'm proud to announce the call for papers for the Meeting C++ > conference! > > After having talked to some people in Aspen about the plans for a C++ > conference in Germany, I've decided to give it a try. > > Meeting C++ will take place in November in Germany, as a 2 Day C++ > conference. > > > > Thank You for organizing this conference! -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de

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[1.50.0] Boost release 1.50.0 available
by Beman Dawes 29 Jun '12

29 Jun '12

Release 1.50.0 of the Boost C++ Libraries is now available. These open-source libraries work well with the C++ Standard Library, and are usable across a broad spectrum of applications. The Boost license encourages both commercial and non-commercial use. This release contains four new libraries (Algorithm, Functional/OverloadedFunction, LocalFunction and Utility/IdentityType) and numerous enhancements and bug fixes for existing libraries. For details, including download links, see http://www.boost.org/users/news/version_1_50_0 You can also download directly from SourceForge: http://sourceforge.net/projects/boost/files/boost/1.50.0/ To install this release on your system, see http://www.boost.org/doc/libs/release/more/getting_started/index.html Thanks, --The Boost release team Beman Dawes Daniel James Eric Niebler Marshall Clow Rene Rivera Vladimir Prus

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[Boost.Python] Is it possible classes X Y returned each other?
by Sergiy Nazarenko 29 Jun '12

29 Jun '12

Hi, all! I'm writing python module and run into obstacle. I need a couple of classes which can return instance of each other. This is part of my module: /// mysupermodule.cpp ... struct X { X():s("default") {} X(std::string s):s(s) {} Y getY() const { return Y(); } }; struct Y { Y():s("default") {} Y(std::string s):s(s) {} X getX() const { return X(); } }; ... /// And I got obvious error: mysupermodule.cpp:45:5: error: ‘Y’ does not name a type. How can I solve this task? Regards Sergiy

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boost 1.50 different libraray naming?
by Szymon Gatner 29 Jun '12

29 Jun '12

Hi, I just build v 1.50 on Win 7 / Visual Studio 2008 SP1 (msvc9) and I am getting linker errors like: Error 21 fatal error LNK1104: cannot open file 'libboost_filesystem-vc90-mt-gd-1_50.lib' test test because in this release files are named without "90" part: libboost_filesystem-vc-mt-gd-1_50 while in 1.49 (and below): libboost_exception-vc90-mt-gd-1_49 Regards, Szymon Gatner

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