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Re: [boost] [multi_index] problem with Travis integration
by Nikita Kniazev 30 Dec '18

30 Dec '18

This might be connected to GitHub Services deprecation https://developer.github.com/changes/2018-04-25-github-services-deprecation/ https://blog.travis-ci.com/2018-09-27-deprecating-github-commit-status-api-… Sorry to be such a noob when it comes to Travis integration, but for the > life of > me I just can't see how to fix the following: > Travis was activated for boostorg/multi_index yesterday, and, in > addition, I've been given > admin privileges to boostorg/multi_index so I can, in theory, control > how the Github/Travis > communication happens. Evreything is working OK except that, when I push > something to > develop, *two* Travis tasks are created, named "Travis CI - Branch"and > "continuous-integration/travis-ci/push": > whereas in all the other boostorg libs I've examined, only > "continuous-integration/travis-ci/push" appears (example with smart_ptr): > I've walked all over the settings pages for both Travis and Github, > looked up on > the Internet and didn't come to any conclusion as to what this "Travis > CI - Branch" > thing is and how it can be turned off so that integration looks the same > way > as for any other Boost lib. > Any clue much appreciated. > Joaqu?n M L?pez Mu?oz

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[multi_index] Travis/AppVeyor activation request
by Joaquin M López Muñoz 29 Dec '18

29 Dec '18

Hi, Could some administrator with the required permissions activate Travis and AppVeyor integration for boostorg/multi_index? Thank you! Joaquín M López Muñoz

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GSOC 2019
by Amit Singh 28 Dec '18

28 Dec '18

Hi Sir/Ma'am, My name is Amit Singh and I'm 2nd year CS student. I would like extend GSoC 18 boost stats idea with few ML models and tools

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Does async_accept only access connection object raw pointer and wrapped it by shared pointer internally?
by hh h 27 Dec '18

27 Dec '18

I don't like to use raw pointer by new and delete, but the following code will be crashed by double delete, can't async_accept accept shared pointer? std::shared_ptr<session> new_session = std::make_shared<session>(io_service_, context_); acceptor_.async_accept(new_session->socket(), boost::bind(&server::handle_accept, this, new_session.get(), boost::asio::placeholders::error)); Thank you.

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[GSoC-2019] Guidance about GSoC 2019
by Karthik Kothuri 24 Dec '18

24 Dec '18

Hi, I am Karthik Kothuri, a 2nd year Computer Science and Engineering student at National Institute of Technology, Warangal. I would like to contribute to this organization in view of GSoC 2019. Any mentor is requested to guide me regarding this and tell me where to get started. I am experienced with moderate C++ and have been using it extensively for over an year for my Data Structures and Algorithms course. I also have a basic knowledge of object oriented programming which I will improve over the course of the next few months as part my college curriculum. Thanks.

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[uuid] constexpr uuid from string and ""_uuid literal
by Tobias Loew 24 Dec '18

24 Dec '18

Hi, while searching for constexpr GUID from string generators, I found https://gist.github.com/AlexBAV/b58e92d7632bae5d6f5947be455f796f . Since I still work with VS 2015, I wrote a C++11 constexpr version incl. boost-uuid generators. If there's interest adding this to boost uuid, please have a look at https://github.com/tobias-loew/constexpr-GUID-cpp-11 NB. This is not a finished version to be added to uuid. Comments and BOOST-Macros for constexpr needs to be added. Tobias -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Dev-f2600599.html

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ASIO TCP socket scalability for large scale connections
by hh h 24 Dec '18

24 Dec '18

Hi, In regard to ASIO TCP socket implementation, for each connections the server needs to open and to maintain a session, obviously there need be adequate RAM and CPU resources for supporting large connections, but does ASIO TCP socket itself has any limitation for connecting to large clients which could be over 10000 or more simultaneously? What will be the maximum connections a single ASIO TCP socket server can handle? Thank you.

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Re: [boost] Should pass boost::asio::io_service by raw pointer or smart pointer?
by Vinnie Falco 24 Dec '18

24 Dec '18

On Thu, Dec 20, 2018 at 6:45 PM Richard Hodges <hodges.r(a)gmail.com> wrote: > ...even with Vinnie's easy to follow guide, it requires a hundred lines of > boilerplate to implement what amounts to one async method. Yes, that is kind of irritating. I've been working on some tools to make it easier. The function wrap_handler returns a new completion handler which wraps your function object (lambda) and inherits the allocator and executor of another completion handler: <https://github.com/vinniefalco/beast/blob/8afbc6090bded0cdfda46871d829ea778…> The class template base_handler<> is meant as a base class for composed operations, it holds the handler for you and it provides all the hooks. I notice that you didn't include an overload for asio_handler_invoke in your example, which will certainly cause undefined behavior in some cases: <https://github.com/vinniefalco/beast/blob/8afbc6090bded0cdfda46871d829ea778…> You can see both wrap_handler and handler_base used together to implement a composed operation, a flavor of async_read_some which has a built-in timeout: <https://github.com/vinniefalco/beast/blob/8afbc6090bded0cdfda46871d829ea778…> In particular, handler_base let me leave out all of the boilerplate which is nice. It is possible that with some adaptation these utilities can be used to achieve the result you desire. These experimental features will appear in Boost.Beast version 1.70.0. Regards

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GitHub testing issues
by Cromwell Enage 22 Dec '18

22 Dec '18

Hi, everyone! Starting yesterday, I experienced failures on all my test builds. Their logs contain the following message: travis_time:end:1a83bdea:start=1545229245463720000,finish=1545229258317024000,duration=12853304000 [0Ktravis_fold:end:install.10 [0Ktravis_fold:start:install.11 [0Ktravis_time:start:04d79bf0 [0K$ ./b2 headers boost-install.jam: No such file or directory Jamroot:307: in boost-install ERROR: rule "boost-install.boost-install" unknown in module "Jamfile</Users/travis/build/CromwellEnage/boost-root>". libs/atomic/build/Jamfile.v2:38: in modules.load /Users/travis/build/CromwellEnage/boost-root/tools/build/src/build/project.jam:372: in load-jamfile /Users/travis/build/CromwellEnage/boost-root/tools/build/src/build/project.jam:64: in load /Users/travis/build/CromwellEnage/boost-root/tools/build/src/build/project.jam:89: in load-used-projects /Users/travis/build/CromwellEnage/boost-root/tools/build/src/build/project.jam:75: in load /Users/travis/build/CromwellEnage/boost-root/tools/build/src/build/project.jam:142: in project.find /Users/travis/build/CromwellEnage/boost-root/tools/build/src/build-system.jam:618: in load /Users/travis/build/CromwellEnage/boost-root/tools/build/src/kernel/modules.jam:295: in import /Users/travis/build/CromwellEnage/boost-root/tools/build/src/kernel/bootstrap.jam:139: in boost-build /Users/travis/build/CromwellEnage/boost-root/boost-build.jam:17: in module scope travis_time:end:04d79bf0:start=1545229258327432000,finish=1545229259660893000,duration=1333461000 [0K [31;1mThe command "./b2 headers" failed and exited with 1 during . [0m It's also happening on Appveyor, and just from looking at < https://github.com/boostorg/graph/pull/144>, I'm not the only one who is encountering these errors. Any help would be appreciated. Thanks! Cromwell D. Enage

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New library proposal: Autodiff
by Matt Pulver 21 Dec '18

21 Dec '18

Hello, An automatic differentiation <https://en.wikipedia.org/wiki/Automatic_differentiation> C++ library - Autodiff - is released under the Boost License and is proposed for inclusion into Boost: - Github: https://github.com/pulver/autodiff - Boost Library Incubator: http://blincubator.com/bi_library/autodiff-2/?gform_post_id=1716 Features: - Instances of autodiff variables satisfy Boost's Conceptual Requirements for Real Number Types <https://www.boost.org/doc/libs/1_69_0/libs/math/doc/html/math_toolkit/real_…>. In fact the class and function template definitions are based upon the tables in this page. - No use of dynamic memory. The only member variable is a std::array<>. - Consistent with Boost's type promotion templates. When adding/multiplying/etc. variables of differing dimension number and sizes, the resulting data type is calculated at compile-time. - Single header-only file. - Intuitive and minimal API. Requirements: - C++17 compiler that supports constexpr if statements. There are a fair amount of calculations done at compile-time which would require messy SFINAE hacks to make this C++14-compatible. Todo: - A github build matrix that also includes clang and MSVC. - Additional documentation, including the mathematics. Feedback and endorsements for Boost Library inclusion are welcome and requested. Best regards, Matt

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