March 2016 - Boost - lists.preview.boost.org

[serialization] Back Versioning issue
by Janusz Zradomia 02 Mar '16

02 Mar '16

We want to use boost::serialization with boost::asio in one of our software, but we have a critical issue which prevents our further work. It refers to the "Back Versioning" known problem in TODO section: "It has been suggested that a useful feature of the library would be the ability to create "older versions" of archives. Currently, the library permits one to make programs that are guaranteed the ability to load archives with classes of a previous version. But there is no way to save classes in accordance with a previous version. At first I dismissed this as a huge project with small demand. A cursory examination of the code revealed that this would not be very difficult. It would require some small changes in code and some additional tests. Also it would require special treatment in the documentation - perhaps a case study. " *We want to ask what is status of this issue and can we expect to fix this in near future.* This is a networking project, our program compiled with e.g. boost 1.62 or some future version must create archives that can be (sent over the network and then) read on the program compiled with older version like 1.57 for example (as now available by default of Windows/cygwin). We would hope that we can do something like; Archive ar; ar.set_compatibility_boost_version(1, 55); ar << ... We would also need to backport the patch to older version of boost archive, so they also can write archives readable by (even older) versions. In the end we expect to run machines with: boost 1.55 (plus patch to set compatibility) boost 1.57 (plus patch to set compatibility) boost 1.58 (plus patch to set compatibility) boost 1.62 (perhaps by default with the set compatibility option) and each of this computers needs to write archive readable by all other versions (set they would all set compatibility to lowest common version). Without this functionality we can not use boost archive in this project. We would like to help you test/backport this fix and perhaps even try to code it, although we do not yet have any experience in writing code for boost library itself. Can we expect this functionality to be written in e.g. this year? Best regards

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[doc] Liven up Boost Documentation with Java Script?
by Krzysztof Jusiak 01 Mar '16

01 Mar '16

Dear Boosters, I'm writing to ask about your opinion regarding more interactive documentation for Boost. I know already that some of you would like to see online documentation without Java Script and that's absolutely fine and I agree that documentation should be available for anyone and any configuration. Nevertheless, I would like to know what the Boost community thinks about having following features in the documentation... * Run the code online (allows to check library with one click) * Comments (allows commenting on the documentation) * Chats (allows discussing issues and solutions) Personally, I have found above features extremely useful when checking out other languages/libraries and therefore I have implemented solutions for C++ too. Please, check it out (JS is required)... http://boost-experimental.github.io/msm-lite http://boost-experimental.github.io/di If there is an interest I can provide generic solution to allow developers to write documentation using markdown (mkdocs) and simply integrate it with their libraries. Currently, theme is just slightly modified version of readthedocs, however Paul Fultz II has prepared a boost theme for Fit library ( https://github.com/pfultz2/mkdocs-boost) already and it might be easily integration with the JS facilities provided. Cheers, Kris

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[ublas]Contribute about Toeplitz Matrix
by Shangtong Zhang 01 Mar '16

01 Mar '16

Hi David Bellot, It’s disappointed that boost was rejected by gsoc 2016. I was interested in ublas project, and have implemented parts of toeplitz matrix. Anyway I don’t want to abandon my implementation half way, so I’d like to continue on toeplitz matrix. Would you like to guide me to succeed in integrating toeplitz matrix into ublas? Thanks, Shangtong Zhang, Senior Student, School of Computer Science, Fudan University, PRC.

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