March 2014 - Boost - lists.boost.org

GSoC Summer Project Queries.
by Ashrith H Chinivar 18 Mar '14

18 Mar '14

Hey, This is Ashrith and I have a few queries related to the development of Boost.uBLAS library and the general expectation for the proposal with respect to the algorithmic implementation for Google SoC 2014. I hope the reply will help me narrow down on my options for this year's GSoC. The linear algebra library for Boost which expects the developer to perform Matrix multiplication and various mathematical actions w.r.t the vector spaces and matrix multiplication. Can this be done in C++ with no prior knowledge of MATLAB? I am however, very interested in contributing to the project from algorithmic point of view and including RADIX sort and various other algorithms or short-cuts that would facilitate C++. I am currently undergoing a course on Linear Algebra and Matrices. So I would e happy to consider this as the option to apply for this year's GSoC. So please reply regarding the Boost.uBLAS and other possible implementaions that is expected or which I can submit through my synopsis/proposal. I would be glad to join in on the IRC if that is possible. Thank you, Ashrith H C

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GSoC 2014: boost radix sort
by Shahamat Mehdi 18 Mar '14

18 Mar '14

I have studied radix sort and it does not seem to be a very difficult task. I want to know what exactly will be required from me in this task. It will be highly appreciated if i get a link to the work that is already done so i could understand how to take it ahead. Thanks

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Re: [boost] Arithmetic (opaque) type without implicit conversions
by Gonzalo BG 18 Mar '14

18 Mar '14

> What is the Arithmetic concept? Types that supports all operations provided by integral and floating point types "model" the Arithmetic "constraint" (better than the word concept in this context), as checked by std::is_arithmetic<T> [0], which is defined as std::is_integral<T> || std::is_floating_point<T>. I don't static_assert(std::is_arithmetic<T>) to allow other types that might be viable but for which there is not a specialization of std::is_integral/std::is_floating_point. [0] http://en.cppreference.com/w/cpp/types/is_arithmetic On Tue, Mar 18, 2014 at 5:38 PM, Robert Ramey <robertmacleranramey(a)gmail.com > wrote: > > > On Tuesday, March 18, 2014 8:42:02 AM UTC-7, Gonzalo BG wrote: >> >> Arithmetic<T, U = void> is a type that: >> - models the Arithmetic concept, >> > > What is the Arithmetic concept? > > >> - wraps a T that also models the arithmetic concept, and >> - can be used as a strong/opaque typedef for T. >> >> It is thus similar to Boost.Serialization's BOOST_STRONG_TYPEDEF, >> - but without any implicit conversions (only explicit ones), and >> - it supports move semantics and C++14 constexpr. >> >> The code is here: https://github.com/gnzlbg/arithmetic_type >> The Readme.md is brief, so I refer you to there for more information. >> There are also some tests, although it could use some more. >> >> The LoungeC++ and Morwen(a)codereview.stackexchange deserve credit for >> some >> improvements on the implementation. >> The remaining mistakes are only mine. >> So please, destroy my implementation if you find any mistakes. >> >> I find it useful to strongly type interfaces that involve indices, e.g. >> in >> an octree implementation where child/neighbor indices for a node with >> different types result in clear compilation errors if mixed. >> >> I hope you find it useful too. >> >> Bests, >> Gonzalo BG >> >> _______________________________________________ >> Unsubscribe & other changes: http://lists.boost.org/ >> mailman/listinfo.cgi/boost >> >

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GSoC boost help
by Shahamat Mehdi 18 Mar '14

18 Mar '14

I want to work on radix sort algorithm for boost in this GSoC. Please tell me how can I contact a mentor. I have a some questions before i can submit my proposal. So, please help me.

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Arithmetic (opaque) type without implicit conversions
by Gonzalo BG 18 Mar '14

18 Mar '14

Arithmetic<T, U = void> is a type that: - models the Arithmetic concept, - wraps a T that also models the arithmetic concept, and - can be used as a strong/opaque typedef for T. It is thus similar to Boost.Serialization's BOOST_STRONG_TYPEDEF, - but without any implicit conversions (only explicit ones), and - it supports move semantics and C++14 constexpr. The code is here: https://github.com/gnzlbg/arithmetic_type The Readme.md is brief, so I refer you to there for more information. There are also some tests, although it could use some more. The LoungeC++ and Morwen(a)codereview.stackexchange deserve credit for some improvements on the implementation. The remaining mistakes are only mine. So please, destroy my implementation if you find any mistakes. I find it useful to strongly type interfaces that involve indices, e.g. in an octree implementation where child/neighbor indices for a node with different types result in clear compilation errors if mixed. I hope you find it useful too. Bests, Gonzalo BG

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[ANN] Registration for CppCon 2014 is Open
by Boris Kolpackov 18 Mar '14

18 Mar '14

CppCon, The C++ Conference Opening Keynote by Bjarne Stroustrup September 7–12, 2014 Bellevue, Washington, USA Registration is now open for CppCon 2014 to be held September 7–12, 2014 at the Meydenbauer Center in Bellevue, Washington, USA. This year the conference starts with the keynote by Bjarne Stroustrup titled "Make Simple Tasks Simple!" CppCon is the annual, week-long face-to-face gathering for the entire C++ community. The conference is organized by the C++ community for the community. You will enjoy inspirational talks and a friendly atmosphere designed to help attendees learn from each other, meet interesting people, and generally have a stimulating experience. Taking place this year in the beautiful Seattle neighborhood and including multiple diverse tracks, the conference will appeal to anyone from C++ novices to experts. What you can expect at CppCon: * Invited talks and panels: CppCon keynote by Bjarne Stroustrup will start off a week full of insight from some of the world’s leading experts in C++. Still have questions? Ask them at one of CppCon's panels featuring those at the cutting edge of the language. * Presentations by the C++ community: What do embedded systems, game development, high frequency trading, and particle accelerators have in common? C++, of course! Expect talks from a broad range of domains focused on practical C++ techniques, libraries, and tools. * Lightning talks: Get informed at a fast pace during special sessions of short, informal talks. Never presented at a conference before? This is your chance to share your thoughts on a C++-related topic in an informal setting. * Evening events and "unconference" time: Relax, socialize, or start an impromptu coding session. CppCon’s goal is to encourage the best use of C++ while preserving the diversity of viewpoints and experiences, but other than that it is non-partisan and has no agenda. The conference is a project of the Standard C++ Foundation, a not-for-profit organization whose purpose is to support the C++ software developer community and promote the understanding and use of modern, standard C++ on all compilers and platforms. For more information about the conference and to register, visit: http://cppcon.org

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Boost.Compute v0.1 Released
by Kyle Lutz 18 Mar '14

18 Mar '14

I'm proud to announce the initial release (version 0.1) of Boost.Compute! It is available on GitHub [1] and instructions for using the library can be found in the documentation [2]. Boost.Compute is a GPGPU and parallel-programming library based on OpenCL. It provides an STL-like API and implements many common containers (e.g. vector<T>, array<T, N>) as well as many common algorithms (e.g. sort(), accumulate(), transform()). A full list can be found in the header reference [3]. I hope to propose Boost.Compute for review in the next few months but for I'm looking for more wide-spread testing and feedback from the Boost community (please note the FAQ [4] and design rationale [5] where I hope to have answered some common questions). Thanks, Kyle [1] https://github.com/kylelutz/compute [2] http://kylelutz.github.io/compute/ [3] http://kylelutz.github.io/compute/compute/reference.html [4] http://kylelutz.github.io/compute/boost_compute/faq.html [5] http://kylelutz.github.io/compute/boost_compute/design.html

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[math] Extensive warnings when compiling with clang
by Brian Ravnsgaard Riis 18 Mar '14

18 Mar '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I realise these are not that serious, just annoying. See example below. I'm building with clang++, modified to default in C++11 mode. /Brian Riis clang-linux.compile.c++.with-pch bin.v2/libs/math/build/clang-linux-3.4/release/link-static/threading-multi/fminf.o In file included from <built-in>:168: In file included from <command line>:4: In file included from /home/brian/programming/boost/libs/math/build/../src/tr1/pch.hpp:9: In file included from ./boost/math/special_functions.hpp:15: In file included from ./boost/math/special_functions/airy.hpp:10: In file included from ./boost/math/special_functions/bessel.hpp:18: In file included from ./boost/math/special_functions/detail/bessel_jy.hpp:14: In file included from ./boost/math/special_functions/gamma.hpp:28: In file included from ./boost/math/special_functions/lanczos.hpp:1288: ./boost/math/special_functions/detail/lanczos_sse2.hpp:54:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d vx = _mm_load1_pd(&x); ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:55:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d sum_even = _mm_load_pd(coeff); ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:56:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d sum_odd = _mm_load_pd(coeff+2); ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:57:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d nc_odd, nc_even; ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:57:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d nc_odd, nc_even; ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:58:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d vx2 = _mm_mul_pd(vx, vx); ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:139:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d vx = _mm_load1_pd(&x); ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:140:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d sum_even = _mm_load_pd(coeff); ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:141:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d sum_odd = _mm_load_pd(coeff+2); ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:142:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d nc_odd, nc_even; ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:142:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d nc_odd, nc_even; ^~~~~~~~~ ./boost/math/special_functions/detail/lanczos_sse2.hpp:143:4: warning: 'register' storage class specifier is deprecated [-Wdeprecated-register] register __m128d vx2 = _mm_mul_pd(vx, vx); ^~~~~~~~~ 12 warnings generated. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTKAqhAAoJEFES4N8QrEodTJ4H/1Hl2vyJ/Ki7JCK+YZsgwLvr MztU3H4IFfaUf4+EXPjnJbhu5f19Fhupn7RH6PLIJElUBYQGvKSEp2DRNddalrDK vKZVxGe25pDAD1HOsPRKH+74xXqSfeAAbYi/PvwusXLwhS2kYH+k6KzdXn6POsEe PrdweMusGLp9TH36DYNM59+SU16oGPdOj53acZSG06ftG8+1FcFXtb2jTMZY7fZX l/3gUBkQ7kl7ZkAoezNNlKcb/r+dIXNfb2oaV7TwSUGD+7ioQvvsSFjr2ytl3cb8 q01hLY4ih2mjMkrvCfflbAwGXH6noyEm/ySmjAxxekyCyP4na/W648+hAhnlimg= =vvz8 -----END PGP SIGNATURE-----

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GSoC '14 - Boost.Compute
by Roshan 18 Mar '14

18 Mar '14

Hey, I wish to propose a project regarding Boost.Compute. I would love to hear your views on it. Here is a link to my proposal: Dropbox Link <https://www.dropbox.com/s/tkpdomvoxpzisg7/GSoC.pdf> Thanks. -- Warm regards Roshan

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GSoC Boost/Monads
by Дмитрий Карпов 17 Mar '14

17 Mar '14

Hello! My name is Dmitry. I have submitted my prorposal in GSoC. But I'd like change it little bit. What is your expectation from this project? I'd like: - to implement common monad's interface: - functions for async and futures (then(), is_ready and I hope I will have enough time to implement some others) - make some experiment with Either and Maybe monads to implement fmap() for smart pointers and containers Should I keep in my mind some other tasks? Can you advise something about State monad? What should be it used for, input/output or, maybe, for secure operation with implicit type conversion or for something else? This is link to my proposal: http://www.google-melange.com/gsoc/proposal/review/student/google/gsoc2014/… -- Best regards, Dmitry Karpov Cell phone: +7 905 271 94 14

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