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variant with shrink
by Niitsuma Hirotaka 03 Mar '13

03 Mar '13

boost::variant should be variant<int,int> => int variant<int,double> => double variant<int,boost::rational<int> > => boost::rational<int> variant<int,double,std::string> => variant<double,std::string> I wrote such extension https://github.com/niitsuma/variant_shrink Default generalize order is int < boost::rational<int> < float < double < std::complex<double> You can use other custom generalize relation by defining function object is_generalizable_to<Type,TypeTo>

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[type traits] is_literal_type ?
by Robert Ramey 02 Mar '13

02 Mar '13

Any chance of a boost implementation for is_literal_type? Robert Ramey

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Git Conversion Schedule
by Sebastian Redl 02 Mar '13

02 Mar '13

Hi, According to the timeline linked from the svn.boost.org frontpage, we're already using Git: https://svn.boost.org/trac/boost/wiki/ModCvtSchedule But I'm pretty sure that's not the case, right? What is the current schedule? Sebastian

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[tweener] How to copy image files in documentation
by Julien Jorge 01 Mar '13

01 Mar '13

Hi, I wrote the documentation of Boost.Tweener in boostbook format. I have references to some images in the documentation but they are not copied in the target html directory when I type bjam html How can I make the image directory to be automatically copied in the target directory of the generated documentation? Since I am not familiar with the build process of Boost yet, I would accept a reason not to do this as an answer :) Regards, Julien Jorge

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[graph]matching example is not consistent
by Takatoshi Kondo 01 Mar '13

01 Mar '13

Hello, I found some inconcistency on the following example: http://www.boost.org/doc/libs/1_53_0/libs/graph/example/matching_example.cpp This code has graph diagrams as follows: 0 1---2 3 \ / \ / 4---5 6---7 | | | | 8---9 10---11 / \ / \ 12 13 14---15 16 17 Vertices 1 and 2 is connected on the diagram. But "add_edge(1,2,g)" isn't called. I attached the patch that adds the code above. After applying the patch, result is changed. But I think that the essence of the example is not changed. Thanks, Taka

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[type_erasure] overloading macro
by Christophe Henry 28 Feb '13

28 Feb '13

Hi all, I played a bit more with overloading and it started being annoying and error-prone to add more overloads of concept_map (with more arguments) so I wrote a small macro to 1) generate my overloads and 2) save myself the time reading compiler errors when I use BOOST_TYPE_ERASURE_MEMBER and make a mistake in the number of arguments. It's for C++11 (argument pack) as it's all I need at the moment but I suppose that with Boost.Preprocessor, it'd be for C++03 doable. Well, in case it'd be of any use to someone, here it is, with a small test (tested with g+ 4.5 with -std=c++0x). #include <boost/type_erasure/concept_interface.hpp> #include <boost/type_erasure/rebind_any.hpp> #include <boost/type_erasure/derived.hpp> #include <boost/type_erasure/is_placeholder.hpp> #include <boost/type_erasure/constructible.hpp> #include <boost/type_erasure/relaxed_match.hpp> #include <boost/type_erasure/any.hpp> #include <boost/type_erasure/builtin.hpp> #include <boost/type_erasure/any_cast.hpp> #include <boost/type_erasure/detail/macro.hpp> #include <boost/mpl/vector.hpp> #include <iostream> #ifndef BOOST_NO_CXX11_VARIADIC_TEMPLATES #define BOOST_TYPE_ERASURE_MEMBER_VARIADIC_I(qualname,concept_name,member) \ BOOST_TYPE_ERASURE_OPEN_NAMESPACE(qualname) \ template <typename T, typename... Args> \ struct concept_name{ \ static void apply(const T& t, const Args... a) { t.member(a...); } }; \ BOOST_TYPE_ERASURE_CLOSE_NAMESPACE(qualname) \ namespace boost { namespace type_erasure { \ template<class T, typename... U, class Base, class Enable> \ struct concept_interface< BOOST_TYPE_ERASURE_QUALIFIED_NAME(qualname)<T, U... >, Base, T, Enable> : Base { \ typedef void _fun_defined; \ void member(typename rebind_any<Base, U>::type... arg)const \ {call(BOOST_TYPE_ERASURE_QUALIFIED_NAME(qualname)<T, U...>(), *this, arg...);} }; \ template<class T, typename... U, class Base> \ struct concept_interface< BOOST_TYPE_ERASURE_QUALIFIED_NAME(qualname)<T, U...>, Base, T, typename Base::_fun_defined> : Base{ \ using Base::member; void member(typename rebind_any<Base, U >::type... arg)const \ {call(BOOST_TYPE_ERASURE_QUALIFIED_NAME(qualname)<T, U...>(), *this, arg...);} }; \ }} #endif #define BOOST_TYPE_ERASURE_MEMBER_VARIADIC(qualified_name,member) \ BOOST_TYPE_ERASURE_MEMBER_VARIADIC_I( \ qualified_name, \ BOOST_PP_SEQ_ELEM(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(qualified_name)), qualified_name), \ member) // supports overloading, does not require any number of arguments BOOST_TYPE_ERASURE_MEMBER_VARIADIC((n1)(n2)(foo),foo) namespace mpl = boost::mpl; using namespace boost::type_erasure; struct Test { void foo()const { std::cout << "foo() called" << std::endl; } void foo(int i)const { std::cout << "foo(int) called with: " << i << std::endl; } void foo(int i,char c)const { std::cout << "foo(int,char) called with: " << i << "," << c << std::endl; } void foo(double d)const { std::cout << "foo(double) called with: " << d << std::endl; } void foo(int i,double d)const { std::cout << "foo(int,double) called with: " << i << "," << d << std::endl; } void foo(int i,double d,char c)const { std::cout << "foo(int,double,char) called with: " << i << "," << d << "," << c << std::endl; } }; int main() { Test t; any< mpl::vector< n1::n2::foo<_self>, n1::n2::foo<_self, int>, n1::n2::foo<_self, double>, n1::n2::foo<_self, int, double>, n1::n2::foo<_self, int, char>, n1::n2::foo<_self, int, double, char>, copy_constructible<> > > x (t); x.foo(); // calls foo() x.foo(1); // calls foo(int) x.foo(1.0); // calls foo(double) x.foo(1,1.0); // calls foo(int, double) x.foo(1,'a'); // calls foo(int, char) x.foo(1,1.0,'a'); // calls foo(int, double,char) return 0; }

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[ptr_container, crc, format] Open tickets - code patches available
by Joachim Faulhaber 28 Feb '13

28 Feb '13

Hi, there are open tickets: https://svn.boost.org/trac/boost/ticket/7430 (ptr_container: warning fixes) https://svn.boost.org/trac/boost/ticket/7433 (crc: runtime check issue) https://svn.boost.org/trac/boost/ticket/7435 (format: crash) that we have submitted 5 months ago. Along with the bug reports there are code patches for the reported issues, that have been tested and used in production code on different platforms. We would kindly ask the maintainers to look at these issues and to apply the patches to the library code, so they can be integrated in the next release. In case the maintainers do not have time to fix these issues within say the next 2 weeks, I (Joachim) would like to ask for permission to apply the patches. Fixing the issues would be very helpful for us, so we don't have to patch the code locally for every new version. Thanks a lot, Joachim & Franz -- Interval Container Library [Boost.Icl] http://www.joachim-faulhaber.de

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Releasing gil::io
by Christian Henning 28 Feb '13

28 Feb '13

Hi all, I have taken a look at the requirements to release a new library. There is some points I like to discuss. Technically speaking gil::io is a replacement of the older gil io extension. So, it's not really a new library. But of course, I don't mind fulfilling all the requirements. Here are the requirements before merging: * root/libs/libraries.htm entry is OK, both in the alphabetic list and in the category lists. Should I add a gil::io entry? * root/libs/maintainers.txt entry is OK. Should I add a gil::io entry? * The library's root/libs/xxx directory contains an index.html file with either the main docs or a redirection to the main docs. Done * The primary docs pages meet Boost requirements and guidelines. Don't leave this until too late; it has turned up lots of issues in the past. I'm using boostbook and the default templates. * Trunk inspection report is clean. I would need some help here to hook up gil::io test with general boost testing. * Trunk regression tests are reasonably clean or marked up. TODO Thanks, Christian

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Fwd: [Thread] Solution to conflict with MFC?
by Thorsten Ottosen 28 Feb '13

28 Feb '13

Hi Thread maintainers, Anthony speaks about a patch to make this work. Does anyone know where it is? And could it be applied? Thanks -Thorsten -------- Original Meddelelse -------- Subject: [Thread] Solution to conflict with MFC? Date: Tue, 26 Apr 2011 13:28:56 +0200 From: Christian Larsen <contact(a)dword.dk> Reply-To: boost-users(a)lists.boost.org To: boost-users(a)lists.boost.org Newsgroups: gmane.comp.lib.boost.user Hello, I know this has been asked before, but I could not find a good solution. I'm experiencing problems with an application using both MFC and Boost.Thread. Specifically the assertion ASSERT(AfxGetModuleState() != AfxGetAppModuleState()); in AfxCoreInitModule() fails. I link Boost.Thread statically into a DLL in my project. From previous posts to this list and elsewhere, e.g. http://lists.boost.org/boost-users/2009/04/46929.php, I see that the issue is caused by setting _pRawDllMain in tss_pe.cpp. Commenting this line does "solve" the problem, but I would rather not have to hack the Boost source code this way. It seems there is a patch somewhere for this problem (referred to in http://lists.boost.org/boost-users/2009/04/47015.php) but it appears it never made it into the source. Is there any chance of this issue being solved in a better way? Best regards, Christian Larsen

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[Config] N3276 decltype support on VC++ 11
by Michel Morin 28 Feb '13

28 Feb '13

IIRC, Stephan said that VC++ 11 supports N3276 decltype. Shall we "undef" BOOST_NO_CXX11_DECLTYPE_N3276 for VC++ 11? This enables automatic use of decltype-based `boost::result_of`. Trivial patch attached. Regards, Michel

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