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[functional/hash] Interface-breaking changes to hash_combine
by Joaquin M Lopez Munoz 29 Jul '14

29 Jul '14

Hi, There's been a number of internal changes to the implementation of boost::hash_combine during this year, with the result that the documented procedure: http://www.boost.org/doc/html/hash/reference.html#boost.hash_combine namely, seed ^= hash_value(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2), is no longer followed in all cases. This is a backwards compatibility breach --at the very least I think it should be documented. Best, Joaquín M López Muñoz Telefónica

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News about proposed Boost.Application library
by Matus Chochlik 29 Jul '14

29 Jul '14

On Tue, Jul 29, 2014 at 9:39 AM, Klaim - Joël Lamotte <mjklaim(a)gmail.com> wrote: > > It would be nice if get_symbol returned a smart pointer that contained a > shared_ptr to the library. When all such references are released, the > library can be unloaded. > > > > I disagree. In my experience it would be more useful if it contained a > weak_ptr to the library, with a centralised system keeping all loaded > libraries alive and allowing the used to unload the library explicitely. > The get_symbol return type would then be testable. > That way it is easier to find issues related to plugins and its still > possible for the user to prevent these issues at runtime. > +1

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[geometry] convex_hull: dispatch implementation details
by Jeremy Murphy 29 Jul '14

29 Jul '14

Hi, just wondering why boost::geometry::convex_hull is implemented with that dispatch-struct-apply business? Is it because of the two forms of convex_hull: output reference and output iterator? I'm writing a concave_hull implementation, so I'm wondering whether I should emulate the conventions in the convex_hull implementation. Thanks, cheers. Jeremy

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Release branch will be closing Monday night.
by Marshall Clow 28 Jul '14

28 Jul '14

We will be “closing” the release branch late Monday night (Pacific Daylight time) in preparation for building a 1.56.0 release candidate on Tuesday morning. [ Actually, we’re just going to stop the automatic merging to the super-project, but … ] Please refrain from committing to the “master” branch of your libraries after 11:59 Monday night. (unless you have specific permission from the release managers) Thank you. — Marshall

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Merging Pull Requests
by Axel Ismirlian 28 Jul '14

28 Jul '14

I have made some pull requests in several submodules of boost regarding compatibility changes for AIX several weeks ago. Is there any way to get them more attention? I have received no indication on most of them that they have been seen by their corresponding maintainers. Sincerely, -Axel

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[wave] preprocess fails using b2
by Fletcher, John P 28 Jul '14

28 Jul '14

I have been using b2 to build the preprocessed files for boost phoenix. When I try to do this it now fails with a failure to build thread.cpp "g++-4.6" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pedantic -pthread -Wextra -Wno-long-long -Wno-variadic-macros -Wunused-function -pedantic -DBOOST_ALL_NO_LIB=1 -DBOOST_SYSTEM_STATIC_LINK=1 -DBOOST_THREAD_BUILD_LIB=1 -DBOOST_THREAD_DONT_USE_CHRONO -DBOOST_THREAD_POSIX -DBOOST_WAVE_SUPPORT_THREADING=0 -DNDEBUG -I"../../.." -c -o "../../../bin.v2/libs/thread/build/gcc-4.6/release/link-static/threading-multi/wavetool-on/pthread/thread.o" "../../../libs/thread/src/pthread/thread.cpp" ../../../boost/ref.hpp:32:25: error: redefinition of â€˜class boost::reference_wrapper<T>â€™ ../../../boost/core/ref.hpp:59:25: error: previous definition of â€˜class boost::reference_wrapper<T>â€™ ../../../boost/ref.hpp:56:75: error: redefinition of â€˜template<class T> const boost::reference_wrapper<T> boost::ref(T&)â€™ ../../../boost/core/ref.hpp:131:74: error: â€˜template<class T> const boost::reference_wrapper<T> boost::ref(T&)â€™ previously declared here . It looks as though it is picking up two copies of the header file ref.hpp. This is the case with both gcc 4.6 and also gcc 4.9.0 It is not clear to me where the source file is coming from. At the moment all the libraries in my modular boost are checked out as develop. This is meaning that I cannot update my preprocessed files. Please advise me what to do. Thanks John

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[1.56.0] Beta 1 Available
by Marshall Clow 28 Jul '14

28 Jul '14

Boost release 1.56.0 beta 1 is now available from SourceForge See http://sourceforge.net/projects/boost/files/boost/1.56.0.beta.1/ This release contains 2 new libraries: * Align: Memory alignment functions, allocators, and adaptors, from Glen Fernandes. * Type_Index: Runtime/Compile time copyable type info, from Antony Polukhin. Modularization Boost version control has migrated to a system using git submodules. This shouldn't make too much of a difference to users, although the directory structure is now a bit different. Parts of some libraries have been moved into different modules, and several new modules have been extracted from existing code. All header paths should remain the same. The new modules are: * Assert: Customizable assert macros. Maintained by Peter Dimov. * Core: Core utilities used by other libraries, with minimal dependencies. Maintained by Peter Dimov, Glen Fernandes and Andrey Semashev. * Lexical_Cast: General literal text conversions, such as an int represented a string, or vice-versa, from Kevlin Henney. * Throw_Exception: A common infrastructure for throwing exceptions from Boost libraries, from Emil Dotchevski. * Winapi: Windows API declarations without <windows.h>, for internal Boost use. For details of what's in the release, see http://www.boost.org/users/history/version_1_56_0.html. Note that the links to files on this web page are for the final release - use the SourceForge link above to get the beta files. Please download the beta, give it a try, and report any problems you encounter. Thanks, -- The Boost Release Team

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Boost.Any and RTTI
by Chris Glover 27 Jul '14

27 Jul '14

Hi, I need a Boost.Any like facility that doesn't depend on RTTI, so I patched Boost.Any to utilize Boost.TypeIndex if BOOST_NO_RTTI is defined. The diff is available here; https://github.com/cdglove/any/commit/7188b13909a061495ef31f979b55f9779a9e9… Is there any interest in merging this into mainline? Or is someone working on a more correct patch than this? Thanks, -- chris

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[GSoC] Scheduled Executors beta 1 release
by Ian Forbes 27 Jul '14

27 Jul '14

Hello, I am working on implementing scheduled executors as part of GSoC 2014 and am ready to announce my beta 1 release. For more information on my project please see my original proposal at www.cs.mcgill.ca/~iforbe All my work is currently on this branch of boost.thread. https://github.com/BoostGSoC14/boost.thread.executors . I have written a fairly extensive README about design and implementation on this page. Basically a scheduled executor is an executor which guarantees that a certain task won't be run before a certain time point. Its main use cases would be things such as periodically reloading a file, pushing updates, flushing data, and polling. It has a thread safe priority queue that store tasks (currently std::function) along with a chrono::time_point. The priority queue is ordered so that the task with the least time point (closest to time 0) is at the front. There is an abstract class scheduled_executor that deals with all the enqueue methods to the executor. The ctor is protected. There are no virtual members. There are 2 subclasses. scheduled_thread_pool and scheduling_adaptor. These add dequeuing logic to the scheduled_executor by means of a worker thread(s). I'm mostly interested in people reading this part of the README: https://github.com/BoostGSoC14/boost.thread.executors#possible-changes--rfcs This details possible changes that could be made and I would like some feedback on them as these items have both pros and cons. Please provide your feedback and I will to my best to address your questions and concerns. Thanks, Ian

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Portable robust mutex an another try...
by Ladislav Sopko 27 Jul '14

27 Jul '14

Hello, I did try to continue with */Ion Gaztanaga's /*idea of portable robust mutex. I post my code and considerations in codereview. http://codereview.stackexchange.com/questions/57083/portable-c-boostiterpro… I hope to find some one to discuss about. thx -- Sopko Ladislav 3D Informatica, Via Speranza 35, 40068, S.Lazzaro di Savena - Bologna, Italy Tel: +39051450844 | Fax: +39051451942 WWW: http://www.3di.it Documentation: https://intra.3di.it/manuali/ - http://wiki.3di.it FTP: ftp://ftp@ftp.3di.it, Download:/3di, Upload:/incoming **** Informativa Privacy - Ai sensi del D. Lgs n. 196/2003 (Codice Privacy) si precisa che le informazioni contenuti in questo messaggio sono riservate e ad uno esclusivo del destinatario. Qualora il messaggio in parola Le fosse pervenuto per errore, La preghiamo di eliminarlo senza copiarlo e di non inoltrarlo a terzi, dandocene gentilmente comunicazione. Grazie. Privacy Information - This message, for the D. Lgs m. 196/2003 (Privacy Code), may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addessee, you must not use, copy, disclose or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thanks you for your cooperation. --

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