February 2015 - Boost - lists.boost.org

BOOST_HAS_PRAGMA_ONCE
by Stephen Kelly 05 Feb '15

05 Feb '15

Hello, As of commit 5b20f4910d8b6b48b0b6ad2df693d36edf54cf21 in the interprocess repo, the affected files seem to expect prior include of config by the the includer. Apparently this is not obvious to everyone, so it seems worth pointing out. Thanks, Steve.

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Regression tests stopped on Saturday?
by Neil Groves 05 Feb '15

05 Feb '15

Hi, I know there has been a lot go good work going on updating regression testing, and I might have missed an email. I'm currently waiting for some tests to cycle, but there appear to have been no updates since Saturday. Is this expected? Thanks, Neil Groves

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Boost regression testing on Android
by Dmitry Moskalchuk 04 Feb '15

04 Feb '15

Hi all, We've just published CrystaX NDK 10.1 (https://www.crystax.net/android/ndk) which is a drop-in replacement for the Google's Android NDK, and we've included prebuilt Boost 1.57.0 libraries there, to make life easier for those developers who want to use Boost on Android. The reason I write here is that in CrystaX NDK we were able to build Boost for Android without any changes in Boost sources, just because CrystaX NDK makes Android much more POSIX-conformant than original Android is, and Boost just works on top of it. If you're interested how we did it, please read description of CrystaX NDK release on https://www.crystax.net/android/ndk. Another important point is that we were able to run Boost regression tests on Android devices - again, without any changes in Boost sources, just providing own 'adbrunner' script as tests launcher. The only thing needed is to plug one or more Android devices to USB ports and/or run one or more Android emulators and then run script for Boost testing provided by CrystaX NDK. As long as those devices/emulators are available by ADB, Boost regressions tests will run on all of them. As far as I know, Boost is not yet officially supported on Android platform, mainly because of lack of regular regression testing procedure. I wonder if someone would be interested in our results and, if yes, would he/she like to participate in further Boost-on-Android improvements? -- Dmitry Moskalchuk

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[mixin] Library name
by Borislav Stanimirov 04 Feb '15

04 Feb '15

To those unfamiliar with the Boost.Mixin - it is a new library submitted for review. The docs are here: http://ibob.github.io/boost.mixin/index.html The code is here: https://github.com/iboB/boost.mixin It has been suggested multiple times that perhaps the name "mixin" isn't appropriate, so I was wondering if I can find a better one. The current name, mixin, is, as the library itself, inspired by the mixins in the Ruby programming language. However, it doesn't do exactly what Ruby's mixins do (as mentioned here: http://ibob.github.io/boost.mixin/boost_mixin/introduction.html#boost_mixin… ) My current alternative ideas are: * EntityComponent - not great since it doesn't exactly follow the entity-component-system pattern, although it can be said that it allows the construction of entities from components. * DynamicMixin - to emphasize that it's not to be confused with the CRTP mixins. It still has "mixin" in it's name though. * Trait - since it resembles the traits in Self, Scala, PHP, etc. However, a trait is more a "compile time" feature (even when talking about PHP) * TypeComposition or TyCo - a very vague description * Polymorph - since it allows the composition of polymorphic types at run time, but that's pobably even more vague Other ideas are welcome. Thanks -- Borislav

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A general qurey
by Mudit Sharma 04 Feb '15

04 Feb '15

What can be done to run boost on Dev-C++? What else can be used for boost?

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[chrono][multiprecision][gsoc] Project proposal, looking for feedback and mentor.
by Damian Vicino 04 Feb '15

04 Feb '15

Hi, I’m collaborating with other students working in “Simulation Driven Development” (SimDD), mostly for embed systems. The main idea in SimDD is modelling complete systems (not necessarily software) and make simulations of them. Once the simulation has the expected results start replacing some sub-models (software pieces) by real application code. The pieces that are not replaced are used to provide testing facilities. The main fields where this SimDD is used are robotics and embed systems. Where you can clearly separate models in three groups: the software, the interaction (i.e. sensors) and the environment. The software is what you are developing, the environment is the things the software will interact with and the sensors are what info the software gets from the environment and how. When the software is ready, it interacts with the sensors and the simulated environment for testing. Once tested in simulated environments it can be implemented in real world. In this context, I work in time representation problems for discrete event simulation and I will like to propose some additions to the Boost library as GSOC project. — Adding a clock to chrono for virtual simulation time, so models and real code can both work using same library for time representation. — Adding multi base support for multi-precision library. — Adding the option for an accurate mode to multi-precision (meaning a failure should happen when the result requires to be rounded and, if possible, detected at compile time). — Supporting multi base multi-precision in chrono. — For sure, documentation and tests included for everything. Is anybody interested in these additions? Can you provide some feedback about them? Is anybody interested in be my mentor for GSOC in this project? In the last year, I had being working in a general-purpose Discrete Event Simulation library as a side-project that I hope to contribute to boost. The library was submit for registration to blincubator today and in the following days I will be uploading it. Best regards, Damian Vicino

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[config] Visual Studio 2015 Preview CTP 5 FWIW
by Beman Dawes 03 Feb '15

03 Feb '15

VC++ in the 2015 CTP 5 is reporting version 19.00.22512, so needs to be bumped in compiler/visualc.hpp. C++14 digit separators and C++11 universal character names in literals are supposed to be implemented, but I haven't tested them. It would also be interesting if some of bugs in recently added C++11/14 features have been fixed. --Beman

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Hi everyone
by PUNEET KOHLI 03 Feb '15

03 Feb '15

Hello guys. I came to know about your organization from the melange page.Your projects really got me interested. I am a very proficient in c & c++. I have been doing a lot of competitive programming for more than a year so , i can certainly code.I wish to apply to GSOC this year and would love the opportunity if it comes from your organization. Thus, i am looking for a way to contribute and work for you.

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[preprocessor] integration of 'vctuple' branch breaks [accumulator] on msvc
by Jürgen Hunold 03 Feb '15

03 Feb '15

Hi! It seems that commit 01848af60d7639fd441b5d03462e848175cf1692 Merge: fd135a0 dc54fee Author: Edward Diener <...@...> Date: Fri Jan 30 23:16:08 2015 -0500 Merge branch 'vctuple' into develop completely breaks Boost.Accumulator on all msvc versions. I've some code breaking with msvc-12.0 and the msvc-10.0 tests in the regression matrix are all red. For example: http://www.boost.org/development/tests/develop/developer/output/teeks99-08c… fails with: .../accumulators/reference_accumulator.hpp(72) : error C2061: syntax error : identifier 'BOOST_PP_CAT' .../accumulators/reference_accumulator.hpp(72) : error C2947: expecting '>' to terminate template-parameter-list, found '>' .../accumulators/reference_accumulator.hpp(72) : fatal error C1903: unable to recover from previous error(s); stopping compilation Yours, Jürgen -- * Dipl.-Math. Jürgen Hunold ! * voice: ++49 4257 300 ! Fährstraße 1 * fax : ++49 4257 300 ! 31609 Balge/Sebbenhausen * jhunold(a)gmx.eu ! Germany

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GSOC 2015 : Project on Concurrent Hash Tables
by Anmol Sood 03 Feb '15

03 Feb '15

Hi, I am Anmol Sood,a second year undergraduate student, pursuing Mathematics and Computing at Indian Institute of Technology,Delhi. I have been following the Boost mailing list for the last couple of months and I have been trying to understand some Boost libraries and enhancing my skills in generic programming at the same time. I saw the GSOC 2015 Boost page ( https://svn.boost.org/trac/boost/wiki/SoC2015) and the project on concurrent hash tables looks really interesting to me. I would like to know on the kind of pre-requisite skills required for the project and if I could share the progress I am making on writing code for the programming competency test here. Any tips/advice on helping me to get started on working for this project will be really helpful. Thanks.

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