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[Release] Boost 1.81.0 closed for beta
by Marshall Clow 14 Nov '22

14 Nov '22

Master is closed for all changes. See the release schedule at: https://www.boost.org/development/index.html <https://www.boost.org/development/index.html> -- Release managers

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[release] Boost 1.81.0 Beta 1 Release Candidate 1 is available
by Marshall Clow 13 Nov '22

13 Nov '22

Available at: <https://boostorg.jfrog.io/artifactory/main/beta/1.81.0.beta1/source/> The SHA256 checksums are as follows: 6b6b95fde0ec9c6c0e1584f35c6c2dc4eb6c8629c9635e844b8e6a9ad9594da1 boost_1_81_0_b1_rc1.tar.gz 9f2ce5d1cefb8f6b7e8cfcabc73632f348958e7cba2604dcb3688fecf6463d67 boost_1_81_0_b1_rc1.tar.bz2 e7547a789339499c6fc582a96ffb8989d97074f107520ddebc1ed5f30a0d6964 boost_1_81_0_b1_rc1.zip 758af4ae4f4224b6f2bd8f05fe0109d1f248c0377ee2dce03ccbeb30d82fb8b4 boost_1_81_0_b1_rc1.7z As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. -- The Release Managers

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ccmath::abs() gives wrong result
by Gero Peterhoff 11 Nov '22

11 Nov '22

Hi Matt, ccmath::abs() gives wrong result for FP-values std::numeric_limits<FP-Type>::min() in constexpr context. test case: using type = float; constexpr type a = std::numeric_limits<type>::min(), b = boost::math::ccmath::abs(a); std::cout << a << std::endl << b << std::endl; 1.17549e-38 nan The Problem is: template <typename T> inline constexpr T abs_impl(T x) noexcept { return boost::math::ccmath::isnan(x) ? std::numeric_limits<T>::quiet_NaN() : boost::math::ccmath::isinf(x) ? std::numeric_limits<T>::infinity() : x == -0 ? T(0) : x == (std::numeric_limits<T>::min)() ? std::numeric_limits<T>::quiet_NaN() : x > 0 ? x : -x; } In the case of FP-types, only the sign-bit has to be deleted, since one cannot assume that quiet_NaN() and/or signaling_NaN() are always unsigned. thx Gero

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Boost 1.81.0 closed for major changes
by Glen Fernandes 09 Nov '22

09 Nov '22

Release has closed for major changes. Next week, 2022/11/09, master closes for all changes, in preparation for the beta. - Release team

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Build Issue - URL - msvc-14.0
by Tom Kent 05 Nov '22

05 Nov '22

In preparation for the upcoming lockdown and release, I just grabbed the latest snapshot from here: https://boostorg.jfrog.io/artifactory/main/master/boost_1_81_0-snapshot.tar… I ran it through the build process and got some issues with boost::url running on msvc-14.0. Some examples of them are: D:\RB\boost_1_81_0\boost/url/param.hpp(886): error C2134: 'boost::urls::grammar::string_view_base::string_view_base': call does not result in a constant expression D:\RB\boost_1_81_0\boost/url/param.hpp(886): note: failure was caused by call of undefined function or one not declared 'constexpr' The full output log is here: https://gist.github.com/teeks99/8d14da5b50cffda13f9ad5e23a8d80aa Tom

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Does ASIO really still uses reactor instead of proactor on some OSes or is documentation just outdated?
by Ivan Matek 29 Oct '22

29 Oct '22

If you go to https://www.boost.org/doc/libs/1_80_0/doc/html/boost_asio/overview/core/asy… you will see that it says: * On many platforms, Boost.Asio implements the Proactor design pattern in terms of a Reactor, such as select, epoll or kqueue. This implementation approach corresponds to the Proactor design pattern as follows: * *[...]* * On Windows NT, 2000 and XP, Boost.Asio takes advantage of overlapped I/O to provide an efficient implementation of the Proactor design pattern. This implementation approach corresponds to the Proactor design pattern as follows: * I am unfortunately not a pattern or OS expert, but I would expect that on every modern OS proactor can be implemented without using reactor, e.g. see *https://stackoverflow.com/a/57451551/700825 <https://stackoverflow.com/a/57451551/700825>* The fact that mentioned Windows are NT, XP and 2000 also furthers my suspicion that docs are outdated.

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Boost.StaticString
by Vinnie Falco 29 Oct '22

29 Oct '22

Alan de Freitas has generously stepped up to maintain Boost.StaticString in the absence of Krystian. -- Regards, Vinnie Follow me on GitHub: https://github.com/vinniefalco

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1.81.0 closed for new libraries and breaking changes
by Glen Fernandes 28 Oct '22

28 Oct '22

Next deadline: On 2022-11-02 Boost 1.81.0 closes for major code changes. Still open for serious problem fixes and docs changes without release manager review. - Boost release team

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Wants to start contributing to boost libraries
by Shivam Rajput 28 Oct '22

28 Oct '22

Hey, I'm really interested to start contributing to boost, it would be really great if any of you could suggest which libraries that i can start with? Maybe any of the gsoc projects that need maintenance and more work? Currently I'm more interested in c++23 features and trying to implement some of them into libcxx. Thanks and regards Shivam

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Reminder: Oct 26, 1.81.0 closed for new libraries and breaking changes
by Glen Fernandes 18 Oct '22

18 Oct '22

1.81.0 closes for new libraries and breaking changes next Wednesday (2022-10-26). We have two new accepted libraries: MySQL and URL, but only URL has been imported into the organization and has a submodule right now. Glen

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