January 2014 - Boost - lists.preview.boost.org

GSoC
by Utsav Tiwary 31 Jan '14

31 Jan '14

My idea for GSoC involves implementation of advanced maths libraries for boost which involve the solving of boundary value problems using finite difference method. Language to be used is C. Are there any existing implementations ?

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boost::pool nextof method
by Gilbert Polo 31 Jan '14

31 Jan '14

I am currently learning how to use the boost pool library. However, I have a question regarding the nextof of method found in the class simple_segregated_storage.hpp. How does the increment of the void pointer work. How does it know how much to increment the void pointer by in order to get to the next chunk?

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[type_traits] type_traits for types with operator().
by Anton Bikineev 31 Jan '14

31 Jan '14

Hello. Recently I looked for type_traits for callable classes. It so strange, I didn't find such traits. Most likely, I just missed them or something like them. I actually don't know is there a real need for them. Anyway I tried to write such traits at least for practice and metaprogramming training. I tested them with gcc, clang and msvc2010. I would appreciate if you looked at the code. Here is the link<https://github.com/AntonBikineev/is_functional/> to my github repository. It's cool that they can see hidden generated operator() of lambdas closure type. Best regards, Anton.

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Trouble with constructors boost::graph::directed_graph from boost::adjacency_list in C++
by Matthias Beste 31 Jan '14

31 Jan '14

Dear Boost-Users, Related to: boost::graph::directed_graph I've trouble with the Constructors of above as a simple example shows: <<<<<<<<<<<<<<<<<<< using namespace boost; typedef directed_graph<> Directed_Graphtype; class Mywrapper { private: Directed_Graphtype g; public: Mywrapper() : g() {}; }; >>>>>>>>>>>>>>>>>> I got the following Error while compiling: <<<<<<<<<<<<<<<< HOME/svn_repos/collab_cntfet/trunk/STA_signalintegrity/circuitGraph.h|78| instanziiert von hier| /usr/include/boost/graph/directed_graph.hpp|96|Fehler: keine passende Funktion für Aufruf von »boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_index_t, unsigned int, boost::no_property>, boost::property<boost::edge_index_t, unsigned int, boost::no_property>, boost::no_property, boost::listS>::adjacency_list(const boost::directed_graph<>&)«| /usr/include/boost/graph/directed_graph.hpp|96|Anmerkung: Kandidaten sind:| /usr/include/boost/graph/adjacency_list.hpp|451|Anmerkung: template<class EdgeIterator, class EdgePropertyIterator> boost::adjacency_list::adjacency_list(EdgeIterator, EdgeIterator, EdgePropertyIterator, boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::vertices_size_type, boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::edges_size_type, const GraphProperty&)| /usr/include/boost/graph/adjacency_list.hpp|443|Anmerkung: template<class EdgeIterator> boost::adjacency_list::adjacency_list(EdgeIterator, EdgeIterator, boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::vertices_size_type, boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::edges_size_type, const GraphProperty&)| /usr/include/boost/graph/adjacency_list.hpp|435|Anmerkung: boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::adjacency_list(boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::vertices_size_type, const GraphProperty&) [with OutEdgeListS = boost::listS, VertexListS = boost::listS, DirectedS = boost::bidirectionalS, VertexProperty = boost::property<boost::vertex_index_t, unsigned int, boost::no_property>, EdgeProperty = boost::property<boost::edge_index_t, unsigned int, boost::no_property>, GraphProperty = boost::no_property, EdgeListS = boost::listS, boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::vertices_size_type = long unsigned int]| /usr/include/boost/graph/adjacency_list.hpp|435|Anmerkung: keine bekannte Umwandlung für Argument 1 von »const boost::directed_graph<>« nach »long unsigned int«| /usr/include/boost/graph/adjacency_list.hpp|418|Anmerkung: boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::adjacency_list(const boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>&) [with OutEdgeListS = boost::listS, VertexListS = boost::listS, DirectedS = boost::bidirectionalS, VertexProperty = boost::property<boost::vertex_index_t, unsigned int, boost::no_property>, EdgeProperty = boost::property<boost::edge_index_t, unsigned int, boost::no_property>, GraphProperty = boost::no_property, EdgeListS = boost::listS, boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS> = boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_index_t, unsigned int, boost::no_property>, boost::property<b oost::edg e_index_t, unsigned int, boost::no_property>, boost::no_property, boost::listS>]| /usr/include/boost/graph/adjacency_list.hpp|418|Anmerkung: keine bekannte Umwandlung für Argument 1 von »const boost::directed_graph<>« nach »const boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_index_t, unsigned int, boost::no_property>, boost::property<boost::edge_index_t, unsigned int, boost::no_property>, boost::no_property, boost::listS>&«| /usr/include/boost/graph/adjacency_list.hpp|414|Anmerkung: boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::adjacency_list(const GraphProperty&) [with OutEdgeListS = boost::listS, VertexListS = boost::listS, DirectedS = boost::bidirectionalS, VertexProperty = boost::property<boost::vertex_index_t, unsigned int, boost::no_property>, EdgeProperty = boost::property<boost::edge_index_t, unsigned int, boost::no_property>, GraphProperty = boost::no_property, EdgeListS = boost::listS]| /usr/include/boost/graph/adjacency_list.hpp|414|Anmerkung: keine bekannte Umwandlung für Argument 1 von »const boost::directed_graph<>« nach »const boost::no_property&«| ||=== Build finished: 11 errors, 0 warnings ===| >>>>>>>>>>>>>>>>>>>>>>>>>> I would really like to know, where the problem is with this templates. The default constructor exists of course for boost::directed_graph and boost::adjacency_list a.s.o. ... however the compiler don't like them. This is confusing. Can someone help me out? Kind Regards Matthias -- Dipl.-Ing. Matthias Beste Wissenschaftlicher Mitarbeiter Lehrstuhl für Dependable Nano Computing (CDNC) Institute für technische Informatik (ITEC) Karlsruhe Institute of Technology (KIT) Haid-und-Neu Str.7 (Bldg 07.21) 76131 Karlsruhe, Germany Phone: +49 721 608-45009; Fax: +49 721 608-43962 Email: matthias.beste(at)kit.edu <mailto:matthias.beste@kit.edu> web: http://cdnc.itec.kit.edu/

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[cmake] Plans/status
by Ruslan Baratov 31 Jan '14

31 Jan '14

Hello everyone! I want to ask few questions about this project: https://github.com/boost-cmake/boost-cmake I start with simple one, what is the current status of this project and are there any plans to apply it to the mainline?

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Boost Phoenix 3.0.1 - version numbers and ChangeLog
by Fletcher, John P 31 Jan '14

31 Jan '14

Boost Phoenix 3.0.1 is now on master. I am fixing the bugs previously reported for Boost Phoenix. I have started a file libs/phoenix/ChangeLog (following the example in wave) to log changes made. I am incrementing the lowest number of the version when I merge changes to master and origin/master and also changing the version number in Phoenix and reporting this in the ChangeLog. I hope this will make it easier in the future to keep track of exactly which version it is which is causing a problem. I would welcome any comments on the TODO list in the ChangeLog, in particular where there are problems caused by phoenix for other libraries. I am aware that this applies to boost/log. I am hopeful that some fixes of early bug reports will help with later bugs as well. I have just fixed 5715 which related to the comma operator in statement blocks, and can be fixed with the addition of a header. This fixes a silent error in the execution as compared with phoenix V2 and may well fix other problems. That fix is still in develop and not master until some tests have been done. John Fletcher

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Ownership of tickets for Boost Phoenix
by Fletcher, John P 31 Jan '14

31 Jan '14

I have taken over as maintainer of Boost Phoenix and have started to fix the reported bugs. How do I get to be the owner of the bugs so that I can change their status when they have been fixed and tested? Also how can I be sure to get notification of new bug reports? John Fletcher

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[program_options] documentation for validators
by Alain Miniussi 30 Jan '14

30 Jan '14

Hi, I have a question regarding the validators namespace of program_options documentation. That namespace is referenced in the tutorial in http://www.boost.org/doc/libs/1_55_0/doc/html/program_options/howto.html and some of its functions are used but there is no documentation related with that namespace. Actually, it does not even appears in the reference manual of the lib. Is that intended ? Regards Alain

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[spirit.lex] 9580
by Vyacheslav Andrejev 30 Jan '14

30 Jan '14

Hi All, Can somebody take a look at bug #9580? It's a C++ puzzle. Two as if equivalent expressions demonstrate different behavior. This one auto expr = (this->self("SOME_STATE") += someTokenDef); calls boost::proto::detail::exprns_::operator +=. However this auto lex_def = this->self("SOME_STATE"); auto expr = (lex_def += someTokenDef); calls boost::spirit::lex::detail::operator +=. My guess is that it changes templates instantiaon order, but still I can't explain it and thus can't fix it. -- -- Vyacheslav Andrejev

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Help please with Boost Discussion Policy
by Fletcher, John P 30 Jan '14

30 Jan '14

It has been pointed out to me that I need to change my habits from top posting to be conformant to the Boost Discussion Policy http://www.boost.org/community/policy.html I accept this fully and I am seeking some guidance how to achieve this. At my place of work our email client is Microsoft Outlook 2010 and the normal practice is top posting. When I am at home I can access the same system via a web email client which does the same thing. The Boost policy document reffers to Quote-Fix (http://home.in.tum.de/~jain/software/oe-quotefix/ ) which was last updated in 2006 and does not work with current versions of Outlook. There is also this: http://sourceforge.net/apps/mediawiki/macros4outlook/index.php?title=QuoteF… I am doing most of my Boost work from home and want to be able to communicate freely. Ideally what I want to do is to switch between the styles so that only my Boost and related work is in quoted style. Any help will be much appreciated. Thank you John Fletcher

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