November 2022 - Boost - lists.preview.boost.org

Library proposal - indexed_array
by Julien Blanc 12 Oct '23

12 Oct '23

Hi, I've written and released a (rather small) library which allows defining arrays with arbitrary index mechanisms (hence the name, indexed_array). This especially allows indexing with scoped enums, use non zero-starting indexes, or use sparse indexes. This is not a view, but an array in the sense that it owns the data, and provides the same guarantees and functionalities as std::array, such as triviality propagation, being able to reside in read-only program sections, etc. It also supports multidimensional indexing, and provides an indexed_span template class to access lower dimension content (which can be used outside indexed_array). Finally, it provides an opt-in safer way to initialize the array content, which is especially useful when using complex and/or changing indexing schemes (like based on externally generated files). The library is available here: https://github.com/Julien-Blanc-tgcm/indexed_array And the doc is here: https://julien-blanc-tgcm.github.io/indexed_array/ It requires C++17 and mp11, and has first-class support for describe-d enums. If there is some interest, i'd like to propose it for inclusion in boost. So i'm looking for people who would endorse it. Thanks and best regards, Julien

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Decommissioning Trac (svn.boost.org)
by Glen Fernandes 31 Jan '23

31 Jan '23

We have Trac in read-only mode after we migrated to Git, but we're still paying for the server. Do people still want to preserve any part of the content in some way? The wiki aside, there are old issues, with comments, and some of them have patches attached. Peter had the idea of generating static HTML content from Trac and hosting that on an archive section on boost.org. (I don't know how difficult this is to do). Thoughts? Suggestions? Glen

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Regression Results Not Updating
by Tom Kent 15 Jan '23

15 Jan '23

The results from the pages at: https://www.boost.org/development/tests/develop/developer/summary.html https://www.boost.org/development/tests/master/developer/summary.html Have not updated in almost a month. Can someone check on the process that manages this? Thanks, Tom

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Master branch is now open for bug fixes
by Marshall Clow 07 Dec '22

07 Dec '22

The master branch is now open for bug fixes and documentation changes. Other changes by release manager permission, as described in https://github.com/boostorg/wiki/wiki/Releases%3A-Beta-Merge-Policy The next deadline: On December 7th, master closes for all changes. As always, the calendar is at https://www.boost.org/development/ <https://www.boost.org/development/> — Marshall

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Boost.Text is looking for a (mini-)review manager
by Zach Laine 07 Dec '22

07 Dec '22

I've made all the recommended changes to Boost.Text that came up in the review. Glen, the previous review manager, recommended a mini review of Boost.Text once I'd made those changes. If you'd like to manage the mini-review, please let me know. For everyone, including potential reviewers and review managers, here are the major changes: * All the specific review feedback issues have been addressed. * The string layer is now gone. * The text layer got a major re-work. It is now a set of template-based adaptors (basic_text<>, vs. a text typedef. etc.), which lets everyone get what they want. You can change the underlying storage type (including whatever allocator you prefer), select UTF-8 or UTF-16, and change the normalization form. Glen recommended I drop this layer, but the library is way less useful without this stuff, and these changes address all the concerns raised about the text layer in the review. The updated docs can be found here: https://tzlaine.github.io/text/doc/html/index.html Oh yeah, and I added concept constraints to the whole library when you build in C++20 mode. Zach

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Reminder: Release notes
by Marshall Clow 29 Nov '22

29 Nov '22

If you’ve been meaning to write release notes for your library for the 1.81.0 release, now is the time to do it. ;-) — Marshall

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[release] Boost 1.81.0 beta 1 released
by Marshall Clow 24 Nov '22

24 Nov '22

Boost release 1.81.0 beta 1 is now available at: https://boostorg.jfrog.io/artifactory/main/beta/1.81.0.beta1/source/ The SHA256 checksums are: 135f03965b50d05baae45f49e4b7f2f3c545ff956b4500342f8fb328b8207a90 boost_1_81_0_b1.tar.gz 736b041748d04c573d145613161cf2e54beb210c5511b67e6fac5510b82b6646 boost_1_81_0_b1.7z 941c568e7ac79aa448ac28c98a5ec391fd1317170953c487bcf977c6ee6061ce boost_1_81_0_b1.tar.bz2 c58d50acf58a98d4f5a7d891257d154efa50ca90312ca446586c7b4f9b7d3f14 boost_1_81_0_b1.zip Release notes (still need updates): https://www.boost.org/users/history/version_1_81_0.html Please try the beta and report any problems you encounter. Thanks to everyone who contributed to the release. -- Boost Release Team

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GSoC 2023
by David Bellot 21 Nov '22

21 Nov '22

Dear Boost developers, organization applications for the Google Summer of Code 2023 will start next year in January, that is in about 2 months from now. In order to prepare the application for Boost C++, I would like to have a list of interested mentors and the topics they would like to propose to their students. The Google Summer of Code is a good opportunity for Boost to try ideas or improve existing libraries. Contact me now if you have any questions and are interested in mentoring next summer. Cheers, David

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minor incident report, boost.org
by Sam Darwin 16 Nov '22

16 Nov '22

Hi, This morning around 7am PST the boost.org website appeared to be unavailable. Upon investigation the cause of the problem was traced to DNS. boost.org resolved in DNS. However boost.org redirects to www.boost.org and that failed to resolve at the upstream DNS provider. # nslookup > server dns1.easydns.com > www.boost.org Server: dns1.easydns.com Address: 2400:cb00:2049:1::a29f:1835#53 ** server can't find www.boost.org: REFUSED A "dig" command also showed "..Request blocked by policy". After an hour or so, the situation cleared up. Most likely something at easydns.com. A similar event occurred earlier this year. The C++ Alliance has set up web proxies to alternative domains boostcpp.org and boostlibraries.org in case boost.org is unavailable. Those were online and may be used as a backup. Best Regards, Sam Darwin sam(a)cppalliance.org

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Boost tarball release that works with CMake
by Mojca Miklavec 16 Nov '22

16 Nov '22

Dear developers, For a CMake-based project we need to fetch Boost sources as part of the build process (unless boost is already installed, in which case that version can be used). We are using CMake's FetchContent that recursively clones the repository from GitHub, but that process is extremely slow. On the Windows runner in GitHub actions it takes roughly 3 extra minutes to "git clone" boost alone (or 11 minutes for something like "choco install boost-msvc-14.3"). I tried to fetch the .7z file instead, but that one doesn't work because the CMake support gets stripped from the distributed sources when generating the tarballs. A single file would result in a much faster and more reliable workflow. The file can be cached on GitHub Actions, on a local computer one doesn't need to repeatedly clone the repository (which also slows down other parts of CMake) etc. I started the discussion here: https://github.com/boostorg/release-tools/pull/35 where it has been explained to me that: - either the CMake support needs to be heavily refactored (unlikely to happen soon) - or the project could generate one tarball using the layout that's consistent with git repository The second option might eventually be fulfilled automatically by GitHub, but that is probably not likely to happen any time soon either. I can imagine that creating one extra '.tar.xz' with a slightly different layout to support CMake builds might be straightforward to make. Is there any chance to fulfill my dream to be able to build a boost tarball with CMake out-of-the-box? Thank you very much, Mojca

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