February 2023 - Boost - lists.boost.org

CMake Announcement from Boost Steering Committee
by Jon Kalb 13 Aug '24

13 Aug '24

The libraries produced by the Boost community have had a greater impact on the way that the C++ community writes code than any other library implementation. The focus of the Boost community will always be on the libraries, but it is undeniable that we are dependent on and often limited by the infrastructure of our trade. Years ago, the move to Git was contentious; yet, it was required to improve development. In a similar vein our build system has become an impediment for many developers and users, existing and prospective. Therefore, we, the Steering Committee, announce to the Boost community our desire and intent to move Boost’s build system to CMake for users and developers alike. We are soliciting comments and proposals from the community to guide the process and the goals. Our desire is that the community can come to consensus by the end of the calendar year with a vision of supporting users and developers. We understand that the actual process of achieving the end goal will be long, time consuming, and not without its share of conflict. We also recognize that the Boost community is comprised of bright and passionate individuals that are eager to get involved and help get work done. The members of the Steering Committee have been encouraged by the discussions and activity surrounding CMake on the mailing lists over the years and know that many people have voiced visions. We hope that each of you rejoins the discussion to support this initiative and contributes to the common goal of improving Boost’s integration into the broader C++ ecosystem. For the Boost Steering Committee, Jon Kalb, Chair jonkalb(a)boost.org

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Boost Governance?
by René Ferdinand Rivera Morell 09 Aug '24

09 Aug '24

A disclaimer: I write this solely as a Boost Library author. And not in any other capacity or representing any other interest. It's now been at least a year since Boost switched from the Software Freedom Conservancy to the Boost Foundation for its governance organization. But have people noticed any difference? Did you know that switch happened? Did you know that they held an election for the Board of Directors and for the Officers? Do you know when that election happened? Do you know who got elected? Do you know how they were selected? Do you know what their responsibilities are? Do you know what their bylaws are? Do you know their financials? More importantly: Did you answer "no" to any of those questions? As a library author, I can say I definitely answered no to many of those questions. This is a problem. As authors, without asking, we should know those answers from the organization that governs our work. We should have input into how that organization governs. In other words, we deserve open and transparent governance; not the closed and opaque status quo. -- -- René Ferdinand Rivera Morell -- Don't Assume Anything -- No Supone Nada -- Robot Dreams - http://robot-dreams.net

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Paul Bristow
by John Maddock 08 Aug '24

08 Aug '24

I've just heard that Paul Bristow who helped so much with the development of Boost.Math and indeed many other libraries, passed away peacefully last week. RIP Paul. Much missed. John.

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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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improve <boost/config.hpp>
by Gero Peterhoff 03 Mar '23

03 Mar '23

Hi, for more compatibility with existing boost-macros/defines I came up with - see attachment. 1) Is that correct in principle? 2) Problem: for BOOST_NO_CXX23_HDR_XXX I use __has_include. However, __has_include is not guaranteed to exist. How about the solution? 3) Did I miss useful things? thx Gero

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Has testing on msvc been dropped?
by Daniela Engert 01 Mar '23

01 Mar '23

Hi y'all! I've noticed that e.g. Boost.Log no longer compiles on msvc 19.35 (i.e. VS2022 update 5). Looking at the test matrix to figure out where the problem might lie, I couldn't find any column with the test results of *any* msvc version, lest the current one. Is there a reason for no longer running the tests with msvc compilers? thank, Dani -- PGP/GPG: 2CCB 3ECB 0954 5CD3 B0DB 6AA0 BA03 56A1 2C4638C5

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Re: [boost] Delivery Status Notification (Failure)
by Andre Marin 26 Feb '23

26 Feb '23

Hi, I'm interested in becoming a maintainer. I'm interested in the following projects: - Algorithm <https://www.boost.org/doc/libs/release/libs/algorithm/> - Python <https://www.boost.org/doc/libs/release/libs/python/> - Stl_interfaces <https://www.boost.org/doc/libs/release/libs/stl_interfaces/> - Type Erasure <https://www.boost.org/doc/libs/release/libs/type_erasure/> I'm trying to email olivas(a)icecube.umd.edu, per the Boost website but it's not going through. I'm looking for some guidance. I've included the previous request and email error in this email. Thank you, *Andre Marin * *m:* (832) 495-3545 *e:* andre(a)alexamarin.com <https://www.linkedin.com/in/andremarin629/> On Sun, Feb 26, 2023 at 11:46 AM Mail Delivery Subsystem < mailer-daemon(a)googlemail.com> wrote: > [image: Error Icon] > Address not found > Your message wasn't delivered to *olivas(a)icecube.umd.edu* because the > address couldn't be found, or is unable to receive mail. > The response from the remote server was: > > 550 5.1.1 <olivas(a)icecube.umd.edu>: Recipient address rejected: User > unknown in local recipient table > > > > ---------- Forwarded message ---------- > From: Andre Marin <andre(a)alexamarin.com> > To: olivas(a)icecube.umd.edu > Cc: > Bcc: > Date: Sun, 26 Feb 2023 11:46:03 -0600 > Subject: Boost Library Official Maintainer Program > Hi, > > I'm interested in becoming a maintainer. I'm interested in the following > projects: > > - Algorithm <https://www.boost.org/doc/libs/release/libs/algorithm/> > - Python <https://www.boost.org/doc/libs/release/libs/python/> > - Stl_interfaces > <https://www.boost.org/doc/libs/release/libs/stl_interfaces/> > - Type Erasure > <https://www.boost.org/doc/libs/release/libs/type_erasure/> > > > I've been limited to C++11 at work and I'm new to library contributions. > I'm not sure if there are more appropriate projects for noobs or areas of > need I couldn't find on the website. > > Thank you, > > *Andre Marin * > *m:* (832) 495-3545 > *e:* andre(a)alexamarin.com > <https://www.linkedin.com/in/andremarin629/> >

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Future of boost::TypeTraits
by Gero Peterhoff 24 Feb '23

24 Feb '23

Hello, with the planned changes of the dependencies of the boost libraries to newer C++-standards, I would like to ask how this is planned for boost::TypeTraits. 1) In my opinion it would make sense to remove all TypeTraits that are already in the standard, and only provide those that do not exist in the standard (yet). Of course, this depends on the planned minimum standard for boost::TypeTraits. 2) If, on the other hand, boost::TypeTraits is to continue to work with C++03 (for which there may be reasons), however, quite a few adjustments must be made (for newer C++-standards) and bugs must be fixed. Examples: a) - no inline-variables are provided for C++17 (if useful), e.g. is_arithmetic_v - no concepts are provided for C++20 (if useful), e.g. arithmetic - that's why I already asked how to do this best without coming into (name)conflicts with existing structures/namespaces/etc. b) bugs - e.g. is_integral does not contain char8_t (if available) Probably my remarks also apply to other libraries, possibly TypeErasure, TypeIndex, TTI ... All this has to be reworked fundamentally and consolidated if necessary. best regards Gero

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Boost Libraries and Dropping C++ Language Support
by Glen Fernandes 24 Feb '23

24 Feb '23

*Boost library authors and maintainers are free to drop support for old C++ standards in their libraries, at any time. * This includes libraries that other Boost libraries depend on. It even includes core libraries like Boost.Core or Boost.Static_Assert. We ask that maintainers do the right thing by all our users (which may include other Boost libraries) by announcing a future breakage *at least two Boost releases in advance*. When that eventual release time arrives, if Boost libraries are broken in older standards modes due to another Boost library dropping support, it will not block the Boost release. This means that we do not need to announce "Boost is dropping C++03" because Boost doesn't "support C++03" now as it is. It means that you, maintainer of Boost.X, should realize that you are free to announce that "Boost.X is dropping C++XY in version 1.Z" as you see fit. Boost in its infancy thrived because its libraries were on the cutting edge. Boost libraries today should similarly not be confined simply because other Boost libraries have chosen to depend on them. Furthermore, as Boost release managers we support authors exercising this freedom, and do not intend to impose any restrictions on what language support they must maintain. We will add a page to the Boost website stating the above formally. -- The release team (Glen Fernandes, Marshall Clow)

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Boost 1.82.0 is now closed for new libraries and breaking changes
by Marshall Clow 23 Feb '23

23 Feb '23

Next deadline: On 1-Mar-2023 Boost 1.82.0 closes for major code changes. Still open for serious problem fixes and docs changes without release manager review. As always, the release calendar is at https://www.boost.org/development/ <https://www.boost.org/development/> - Boost release team

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