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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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[Boost.Functional][GSoC] Boost.Functional / Monad project proposal
by Benjamin, John C. (MU-Student) 17 Mar '14

17 Mar '14

Name: John Benjamin College/University?: University of Missouri - Columbia Course/Major?: Computer Science Degree Program (B.Sc., M, Sc., PhD, etc.) M.S. Email: jcb638(a)mail.missouri.edu Homepage: github.com/jchbenjamin Availability: How much time do you plan to spend on your GSoC? 30-40 hours per week What are your intended start and end dates? May 16 - August 19 What other factors affect your availability (exams, courses, moving, work, etc.)? I will be doing 3 credit hours of research Background Information I am a master's student in computer science. I've been hacking and programming computers since I was in Junior High. Please summarize your educational background (degrees earned, courses taken, etc.). I have a B.S. in economics from the University of Kansas. Between Spring 2012 and Spring 2013 I did post-baccalaureate study in Computer Science. I have the equivalent coursework for an undergraduate major in Computer Science. Please summarize your programming background (OSS projects, internships, jobs, etc.). I work for a lab associated with the government on campus where we perform remote sensing work across large sets of satellite data. The focus is on high-performance computing and database design. There is a large SVN repository of C++ code for which I am a regular contributor. Please tell us a little about your programming interests. Please tell us why you are interested in contributing to the Boost C++ Libraries. I am interested in Boost because I have been working with Boost for my work and for many classes. Boost has always been the most satisfying library. It is general purpose, always fast, and really attuned to the needs of the programmer. It is an amazing blend of practical use, solid theory, and good engineering. It would be a huge honor to be able to work with this project. What is your interest in the project you are proposing? I am interested in helping to implement a common monad framework for Boost. Have you done any previous work in this area before or on similar projects? I have worked with Haskell for a year with Prof. William Harrison at my school. Last summer I did research with Haskell and wrote a nifty little program that uses a state monad. What are your plans beyond this Summer of Code time frame for your proposed work?. I hope to continue contributing with this work and to help foster awareness and use of monads. I think that Haskell is on to something with some of its language features. Features like lambdas are already becoming part of the new way of structuring programs. I think monads are a powerful way to reason about and understand the properties of a program. But I don't think a full-blown functional language is practical or necessary for most problems. When typical programmers see that Monads can fit into a language used in industry and that builds on what they already know and expect of the behavior of a language they will be more open to thinking about higher level structural concepts from Category Theory. Please rate, from 0 to 5 (0 being no experience, 5 being expert), your knowledge of the following languages, technologies, or tools: C++ :: 4 C++ Standard Library :: 4 Boost C++ Libraries :: 3 Subversion :: 3 What software development environments are you most familiar with (Visual Studio, Eclipse, KDevelop, etc.)? Eclipse, gnu autotools What software documentation tool are you most familiar with (Doxygen, DocBook, Quickbook, etc.)? Doxygen Project Proposal The proposal is not too creative, just what is described in Boost.Functional / Monads Please provide a description of your proposed work. I will work to make sure the Monad implementation meets the actual description of a monad. One thing I think is important is to be able to have recursive monads that are efficient. The IO monad for example is particularly amenable to recursive structures that allow for easy sanitation of input and output. Proposed Milestones and Schedule Rough draft of milestones and schedules: May 19 - June 2 : review Monads and Category Theory. Understand the current state of Boost.Functional / Monad. Read through Pure and discuss how our implementation is different. June 2 - June 30 : Propose, discuss, and finalize working prototype which implements all the required existing instances of monads and meets syntactic conventions. Begin coding July 1 - July 21 : Implement finalized proposal and prepare for testing July 21- end of summer : test and document my work Please provide any feedback. If you need more information or a more specific proposal please let me know. John Benjamin?

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GSoC 2014 proposal for Boost.Chrono/Date
by Arun Sori 17 Mar '14

17 Mar '14

Hey all, I am interested in the Boost.Chrono/Date project for this year's GSoC. I've made a proposal here<https://docs.google.com/document/d/1jzqAuVh_GZL2TihIlMlG6qX6IfMfOrRw1hOfUre…>, with some good help from the project's mentor. It's open for reviews. Please have a look and point out any mistakes,typos or anything else I am missing. Any feedback is much appreciated. Thanks, Arun

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