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(Boost) Reflecto
by Emil Dotchevski 06 Apr '26

06 Apr '26

I wrote a small constexpr type/enum reflection library which I think may be a good addition to Boost. It needs C++17, although it relies on implementation-specific support (works on gcc, clang and msvc). https://github.com/zajo/reflecto

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[review] [hub] boost::container::hub review starts on April 16
by Ion Gaztañaga 04 Apr '26

04 Apr '26

Dear Boost community, The formal review of Joaquín M. López Muñoz's boost::container::hub container is scheduled for April 16 - April 26. Hub is a nearly drop-in replacement of C++26 std::hive that has excellent performance. https://github.com/joaquintides/hub/blob/develop/README.md#performance The codebase is fairly small (single 1800-LOC header), and due to the subject matter, it is proposed to be part of Boost.Container rather than as a separate library. You can find code and documentation here: https://github.com/joaquintides/hub Best, Ion

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Proposing statsort for Boost.Sort
by Peter Taraba 04 Apr '26

04 Apr '26

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[math] Remez algorithm in Boost Bessel implementation
by znailcode＠gmail.com 02 Apr '26

02 Apr '26

Hi, I am currently working on the Struve function implementation alongside the Bessel functions. To approximate H₀(x) and H₁(x), I plan to use the Remez minimax approximation algorithm, similar to what is used in the current Bessel implementation: https://github.com/boostorg/math/blob/develop/include/boost/math/special_fu… (for example, in the region x ≤ 8). I see that an implementation of the Remez algorithm already exists in Boost here: https://github.com/boostorg/math/blob/develop/include_private/boost/math/to… I would like to ask which implementation of the Remez algorithm was used to derive the Bessel function approximations. Was it this Boost implementation, or a different one? Additionally, how were the reference values computed for the approximation process? Currently, I am using mpmath in Python to generate reference values for the Struve function with the required precision. Best regards, Zaripov Nail

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[release] Master branch is now open for bug fixes
by Marshall Clow 30 Mar '26

30 Mar '26

Hi, The master branch is now open for bug fixes, test and documentation changes, but please follow the policy described in: https://github.com/boostorg/wiki/wiki/Releases%3A-Beta-Merge-Policy The next deadline: On April 1st, the master branch closes for all changes. As always, the calendar is at https://www.boost.org/calendar — The release managers

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Support status for C++03 (std=c++03) in Boost [Version] on RHEL 9
by Piyush Anand 27 Mar '26

27 Mar '26

Hello Boost Community, I am currently planning a large-scale migration of a legacy codebase from SourcePro Rogue Wave to Boost. Due to strict production requirements, we must maintain the -std=c++03 flag across environments: RedHat 9 (GCC 5.x) My Question: Is there any version of Boost, which can be considered the "Long Term Support" equivalent for C++03, for which Boost also release latest patch or security vulnerabilities or actively maintain that version? From older post/blogs, it seems Boost does not manage c++03 standard and provide support of latest standard of c++ only i.e. C++14 and so on. Thanks And Regards, Piyush

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One-time change to the release schedule (two week delay)
by Marshall Clow 26 Mar '26

26 Mar '26

Due to schedule conflicts with the release manager, we are going to postpone the 1.91.0 release for two weeks. I will be updating the calendar later today, but the important dates are: 15-Apr: Master branch closes for the 1.91.0 release 22-Apr: Scheduled release date Note that we’re currently in the post-beta period, so the following caveats still apply: Release open for bug fixes and documentation updates. Other changes by permission of a release manager. Requests to merge changes may be delayed during the week of April 6-10th. I apologize for the inconvenience. — Marshall (for the release managers)

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[Regex] \r matching \n
by Olaf van der Spek 25 Mar '26

25 Mar '26

Hi, In this regex the \n matches \r. How is this defined / controlled? Is there a way to only match \n? std::string s = "[*] A\rB\n"; s = boost::regex_replace(s, boost::regex(R"(\[\*\](.+?)(\n|$))"), "<li>\\1</li>"); std::println("{}", js_encode(s)); // <li> A</li>\rB\n Regards, -- Olaf

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A proposal to delay the Boost release for two weeks
by Marshall Clow 24 Mar '26

24 Mar '26

We have a small problem. Almost all of the release managers will be AFK for the week after Easter, which is the week when we’re scheduled to release 1.91.0 The current schedule is: 1-Apr: Master branch closed 2-Apr: RC1 created 8-Apr 1.91.0 released (assuming no problems) I propose to move all of those dates back two weeks. 15-Apr: Master branch closed 16-Apr: RC1 created 22-Apr 1.91.0 released (assuming no problems) Comments? — Marshall

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Re: Multi Review Result
by Alfredo Correa 19 Mar '26

19 Mar '26

> Date: Mon, 16 Mar 2026 17:51:42 +0000 > From: Matt Borland <matt(a)mattborland.com> > Subject: [boost] Multi Review Result > To: "boost(a)lists.boost.org List" <boost(a)lists.boost.org> > Message-ID: <4otKiL_qCApAgTgtXPKXThbIFKkLIMk63P8vVM0NE-IthZzhBzta1GqWe > wIMTuvg8hFOGRr5ZFCP8X1xrlGJtF0KwrRIZYP-AGw2CLJlKp8=@ > mattborland.com> > Content-Type: multipart/signed; protocol="application/pgp-signature"; > micalg=pgp-sha512; > boundary="------c6d2e97bdd1cf2c5b6caf1a740c0085a140 > 8fcbcdd2b5dfcc2147cf72c1a1483"; charset=utf-8 > > Bottom Line Up Front: The library is conditionally accepted. > Thank you again to everyone who participated in the review. > Thank you all for your important reviews; they are very valuable to me. I know many people spend many hours on this. Special thanks to Matt for managing this review, with whom I will coordinate the next steps. In the coming weeks, I am going to work intensively on revamping the Reference section of the documentation, making other tweaks, and preparing a presentation. Thank you, Alfredo

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