March 2014 - Boost - lists.preview.boost.org

Boost.odeint project for GSoC 2014
by Camille GILLOT 04 Mar '14

04 Mar '14

Hello, I am Camille Gillot. I am a student in French Ecole d'ingenieurs Ecole Polytechnique. I have been programming in C++ for a couple years now, and I would like to take part in boost development through GSoC this summer. I have taken a deep look on the GSoC proposals on boost trac, and I am very interested in working on the boost.odeint or the funtional/'invoke' project. May I have deeper informations on the expected work ? It is the first time I applied to a GSoC project and I worked on boost development, so I need some help about it. Regards, Camille Gillot

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Boost.Align aligned_allocator_adaptor review
by Glen Fernandes 04 Mar '14

04 Mar '14

Changing e-mail subject from 'Re: [boost] Boost.Align review request'. On Fri, Feb 28, 2014, Glen Fernandes wrote: > > On Fri, Feb 28, 2014, Mathias Gaunard wrote: > > It has functions to adapt any memory allocating scheme or C++ allocator into > > an aligned version. > > Related to the first point, I recently implemented class > template boost::aligned_allocator_adaptor to complement > boost::aligned_allocator, but I think I could improve the > implementation. I've improved the implementation of aligned_allocator_adaptor; it does two things that I believe SIMD's version does not do yet: 1. It supports C++11 minimal allocators which do not need to provide all typedefs beyond value_type 2. It supports C++11 allocators which have 'pointer' as a smart pointer (or otherwise non-raw pointer) type Code: http://github.com/glenfe/align/blob/master/include/boost/align/aligned_allo… I'd be happy to contribute this functionality to SIMD's allocator adaptor, via a patch or pull request, if you're interested. Glen

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A new Graph Generator library for GSoC 14
by Khaled Ammar 04 Mar '14

04 Mar '14

Hi every one, I would like to propose an idea for GSoC. boost has only R-Mat graph generator which is not flexible and does not preserve real graph properties. There is another graph generator called RTG which is developed by the same professor (as R-Mat) in CMU. The generator is available on Matlab only but I developed it in C++ and successfully generated graphs with tera edges. I also added a few more functionality to it and added some flexibility in my paper recently accepted in a BigData Benchmark workshop. I would like to make this code available for the graph library in boost. Would anyone endorse this project? -- Thanks, Khaled www.khaledammar.com

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[testing][teeks99] Missing headers in boost checkout
by Andrey Semashev 04 Mar '14

04 Mar '14

Hi, I'm seeing test compilation errors saying that some headers are missing. For example: http://www.boost.org/development/tests/develop/developer/output/teeks99-01a… says that boost/smart_ptr/intrusive_ptr.hpp does not exist. There are other missing headers. The tester is teeks99-01a-win2008-64on64. Is this a known problem?

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Getting started with Boost for GSoC 2014
by Yasas Charitha 04 Mar '14

04 Mar '14

Hi, I'm Yasas and quite new to Open source development. First off little bit of introduction of myself. I'm an M.Sc student in University of Moratuwa, Sri Lanka and I completed my B.Sc degree in Computer Engineering in University of Peradeniya. I'm looking forward to participating in GSoC this year with Boost. I'm very much interest about C++ development and I'm familiar with C++ development on windows. I browsed through the ideas page and I found Boost.Document and Boost.Binaries and Boost.Math Generalized Hypergeometric Functions are quite interesting project ideas. As a beginner for the GSoC I'm kind of confused and excited what to do next etc. Any help is very much appreciated. -- Regards, Yasas C. Perera, E mail - yasas.b(a)gmail.com Tel - (+94) 712 667 122 - (+94) 777 851 619 "Fellowship for Humanity"

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Re: [boost] [GSoC 2014] Http Server Proposal
by Damien Buhl 03 Mar '14

03 Mar '14

Hi Vinícius, Perhaps it's not bad to look at what Artyom Beilis does with cppcms : [http://cppcms.com/wikipp/en/page/main ](http://cppcms.com/wikipp/en/page/main)And others things like [https://github.com/metagoto/fcgixx](https://github.com/metagoto/fcgixx). And considering http, it could perhaps be valuable to look at SPDY / HTTP 2.0, because even if it will be as compatible as possible with HTTP 1.1 I believe that features like server push transactions should be taken into account in your library API. As you spoke about websockets you should have thought to something similar. You spoke about embedded, having facilities or an API which abstracts protocols like CoAP translation from/to HTTP would also be nice in my opinion. Cheers, -- Damien Buhl Em Sáb, 2014-03-01 às 11:46 +0000, Niall Douglas escreveu: > Algorithmically an async HTTP server is not challenging. Yes, I know that. The most challenging part in a HTTP server (in my opinion) is the interface, not event the implementation. That's why I'm considering WebSocket support too, but I have to investigate further about the full scope of the proposal. > Look into > Python's Twisted. Do what they do. I studied several web solutions to serve as inspiration, but I haven't checked Python's Twisted or Boost.AFIO. I'll surely check them now. Thanks for pointing me them out. It may improve my proposal already. :) > Disclaimer: I designed proposed Boost.AFIO. Then I know who I shall bug for questions. :) -- Vinícius dos Santos Oliveira https://about.me/vinipsmaker

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Getting Started with Boost - GSOC 2014
by Harika Matha 03 Mar '14

03 Mar '14

Hi I am Matha Harika. I have received my bachelor's degree in Electronics and Communication Engineering and currently pursuing Masters in CS from IIIT Hyderabad. I am quite comfortable programming in C++. I have checked the proposed project list of Boost and am very excited to contribute(hopefully in GSOC 2014). I have successfully built the Boost libraries. Could anyone please guide me in getting started with the code? Thank You

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Boost.Convert. Take 2.
by Vladimir Batov 03 Mar '14

03 Mar '14

Another day I came across a topic called "String to T conversions - getting it right this time <http://groups.google.com/a/isocpp.org/group/std-proposals/t/a9905ba8e4f33f3e>" on the "ISO C++ Standard - Future Proposals <https://groups.google.com/a/isocpp.org/forum/#%21forum/std-proposals>" that got me interested/curious. Unfortunately, it seemed more of a discussion rather than a proposed/deployable solution to the string conversion issue. Then, I searched Boost archives to see if there was any development in that string-to-type conversion domain since my unsuccessful proposal about three years ago: From: Edward Diener <eldiener <at> tropicsoft.com> Subject: [Review] Boost.Convert, review manager analysis <http://news.gmane.org/find-root.php?message_id=iq12fm%24k6c%241%40dough.gma…> Newsgroups: gmane.comp.lib.boost.devel <http://news.gmane.org/gmane.comp.lib.boost.devel>, gmane.comp.lib.boost.user <http://news.gmane.org/gmane.comp.lib.boost.user> Date: 2011-05-06 15:01:06 GMT (2 years, 39 weeks, 6 days, 23 hours and 47 minutes ago) Unfortunately I was not able to find anything. Apologies if I missed something major/serious (I was not exactly closely monitoring the list). Is anyone aware of any work done in the area? If not, then I am thinking if we could revisit the issue the original (and failed) Boost.Convert tried to address. I am not sure about others but for me that quite essential and seemingly simple task is still quite important. I was watching the development of the lexical_cast but did not see it going beyond its original frugal design. So, maybe we might have another look at the code that Boost.Convert has become and that I've been using/working on?.. Convert V2... From past experience calling it Boost.Convert seems quite premature. :-) I only put Boost.Convert in the title as a reminder for those who participated in the original review. So, the code is at https://github.com/yet-another-user/boost.xtra. The docs are old (from the original proposal) so, if anyone interested, I'd suggest jumping right to the test/example code in libs/convert/test. Apologies for the inconvenience but for now I'll try to see if I should put any effort updating the docs for possible submission. The main difference from the original proposal is that the complicated blob was split in to two separate components -- Convert API facade and a converter. Here it seems very similar to (same as?) boost::lexical_cast which provides a uniform API facade which in turn deploys additional functionality (op<<, op>>). Similarly, Convert V2 requires a converter to be specified for conversion: boost::cstringstream_based_converter ccnv; // char converter boost::wstringstream_based_converter wcnv; // wchar_t converter Then, int a000 = convert<int>::from(not_int_str, -1, ccnv); int a001 = convert<int>::from(std_str, -1, ccnv); int a002 = convert<int>::from(c_str, -1, ccnv); int a003 = convert<int>::from(wstd_str, -1, wcnv); int a004 = convert<int>::from(wc_str, -1, wcnv); Now all the configuration (formatting, locales, etc.) is separate from the API facade and provided (or not) by the plugged in converter. The only available converter tringstream_based_converter allows something like: std::locale rus_locale (rus_locale_name); std::locale eng_locale (""); // Set locale, case, precision, ccnv(std::setprecision(4))(std::scientific)(std::nouppercase); string double_rus = convert<string>::from(double_v01, ccnv(rus_locale)).value(); string double_eng = convert<string>::from(double_v01, ccnv(eng_locale)).value(); Gosh, it's getting too long... cutting it short. The above is probably sufficient for those who participated in the original review. Those who did not might have a look at the (original and old) docs and the test/example code. V.

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testing potential GSOC students
by David Bellot 02 Mar '14

02 Mar '14

Hi Boost mentors, I'd like to know how you test your potential students to see if they have a sufficient level in C++. It's totally different than doing a C++ interview, because they have plenty of time to answer questions and they can use help from google or any other source. For Boost.uBLAS, I ask them to write a little vector library (vector in the sense of linear algebra) using expression templates. It's the bare minimum they have to know. I ask different features to each student. They we talk about their code and I ask them to modify it to introduce new features for example. And you ? Best regards, David

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Re: [boost] [Re] [Re] JSON Parsing Library for GSoC 14
by Ganesh Prasad 01 Mar '14

01 Mar '14

Yeah, the parser generator can be easily implemented using Boost.spirit.qi . So, implementing that would not be much for GSoC. But I have another (a bit complex) idea in this field. Rather than writing a tool to generate tag based DSEL parsers, I can work on one abstraction level up... A tool to generate formal grammars themselves. Why not a library that would take Two level Grammar (Ex : Van Wijngaarden Grammar ) and build parser for the resulting CFG ... It's established that two level grammars are more powerful than single level CFGs and that two level grammars are Turing Complete themselves. So, if we can just implement them in a proper way (maybe I am day dreaming), we might end up with something like the discovery of metaprogramming. I daresay, this dream of mine is feasible, but right now, vague. Provided with some intellectual help, I may come up with a design for such a library in a matter of days. Best wishes Ganesh Prasad

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