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[release] Master branch closes for the 1.86.0 beta release on WEDNESDAY
by Marshall Clow 08 Jul '24

08 Jul '24

Calendar is here: https://www.boost.org/development/ — The Release Managers

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New Boost website ready for launch
by Joaquin M López Muñoz 06 Jul '24

06 Jul '24

Hi everyone, As most of you know, the new Boost website has been in the works for quite a long time: last week we've fixed the last showstopper issues and are now in a position to launch it publicly and announce to the wider community! See the launch-ready website at: https://boost.io The new website is ready to replace the current one at boost.org any time we want. The old site has served us well for 25 years, and it deserves to be given a retirement permit. OVERVIEW The new website is organized in five top-level sections: * News: an aggregator of internal announcements, blog articles, videos, etc. related to the Boost project. * Learn: comprehensive and completely rewritten tutorials and reference material for users, contributors and review participants. Check this out: there's a ton of new stuff here. * Community: links to the various discussion venues for Boost (mailing lists, Slack groups, X, etc.). * Libraries: revamped directory of Boost libraries, with integrated access to version-specific docs, repos, and more. * Releases: access to release notes, download binaries and source code for all Boost versions from 1.16.1 up to the current one. Users can navigate the website anonymously or log in to be able to contribute to the News section, receive notifications etc. The site uses responsive design to work on wide screens as well as your mobile device. Also, check the light and dark modes at the top-right corner :-) FEEDBACK AND FUTURE The evolution of the website does not stop here. We have quite a backlog of issues and new features registered at: https://github.com/boostorg/website-v2/issues https://github.com/boostorg/website-v2-docs/issues But we're also expecting your feedback! Please let us know what you think of the website and ways to improve it. I will personally make sure that all comments and suggestions are properly addressed. Ways to contribute: * Through the mailing list or the #boost-website group at cpplang.slack.com. * Filing issues directly at https://github.com/boostorg/website-v2 (website proper) and https://github.com/boostorg/website-v2 (learning material). * Learning material has an "Edit this page" link from where you can fork any documentation section and propose changes through a pull request. * Reach out to me anyway you'd like. ACKNOWLEDGEMENTS There are just too many individuals to list here who had contributed to the new website --my thanks to all of them. Let me mention some of the people I have worked with the most in the last two months, when I took over the PM role for this launch effort. * The people at REVSYS (Frank Wiles, Lacey Henschel) and Spencer Strickland built the Django-based backend and most of the frontend. Kenneth Reitz and Julio C. Estrada have been working tirelessly to close functionality gaps and fix remaining issues up to launch status. * Peter Turcan is the main author of the new learning material featured in the website. Again, check it out and help us spot glitches or propose new topics to work on. * Sam Darwin, who's already the Atlas upon whom the current Boost infrastructure rests, has double down on his responsibilites to set up and take care of this new backend. * René Rivera wrote many of the scripts that power the old website and has assisted us in the migration process with his expertise and unique insights into the particulars of Boost internal procedures. * Many people have filed issues during development, but the record holder is Andrey Semashev (39 tickets and counting). His suggestions and active involvement in the fixing process have made the website a better place. Best, Joaquín M López Muñoz

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[release] The 1.86.0 release will close for major changes WEDNESDAY
by Marshall Clow 02 Jul '24

02 Jul '24

Calendar here: https://www.boost.org/development/ Next deadline: The master branch will close for the beta next Wednesday. — The release managers

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1.86 release
by Andrey Semashev 01 Jul '24

01 Jul '24

Hi, Are we behind the 1.86 release schedule?

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In Response to Mr. Falco's June 2024 Letter
by Kristen Shaker 01 Jul '24

01 Jul '24

Hello Boost Community, My name is Kristen. Admittedly, I am not the most active participant on the boost mailing list. However, I do serve on the Boost Foundation Board of Directors as Board Chair. It is lovely to e-meet you; Hopefully I'll have the opportunity to get to know you better during the course of my tenure. Recently, we became aware of a letter that was circulated to the Boost developer community. The Boost Foundation Board of Directors have penned the following note in response to that letter. _____________________________________ Dear Boost Community Members, Recently, Mr. Falco distributed a letter indicating intent to a) rescind his offer of hosting a new boost.org website, b) retract his agreement to retire the @BoostLibraries account on X in favor of the established @Boost_Libraries, c) create a new set of Boost mailing lists on boost.io, and d) attempt to purchase the boost.org domain name from Beman Dawes’s estate. While we are surprised and saddened by this turn of events, we agree with Mr. Falco that cutting ties between the C++ Alliance and the Boost Foundation is in everyone’s best interests. That being said, we want to acknowledge Mr. Falco and his employees’ tremendous contributions toward a modernized Boost website and significant investment in maintaining and extending the Boost Libraries. On March 28th, 2024, the Foundation voted to point the boost.org domain name at Mr. Falco’s new site. Given that we had every intention to move forward we were shocked to hear that Mr Falco felt we were “holding [his] work hostage.” The Boost Foundation was entirely unaware of Mr. Falco’s attempts to purchase the boost.org domain name. We were not consulted until it became clear to Mr. Falco that to proceed with the transaction, he would need the login credentials for the domain name provider. At that point, Mr. Falco did contact a board member requesting the credentials, which were not provided to him. We were hesitant to discuss these events publicly, but since Mr. Falco has openly described his attempts to purchase the boost.org domain name, this public response seems appropriate. The fact that he took these steps without coordinating with—or even notifying— the Boost Foundation, has shaken our confidence in the Alliance and Mr. Falco. While we very much appreciate Mr. Falco's financial investment, nonprofits like Boost are not—nor should they be—beholden to their largest financial contributors. We are committed to continuing to foster a collaborative environment where C++ developers can contribute great ideas to the open source community. Boost's consensus-based process is not always the fastest way to the best result, but it is consistent with that commitment. Ideally, Mr. Falco would be interested in contributing financially to a worthy cause without assuming control over the Libraries, but his letter indicates otherwise. Therefore, we agree with Mr. Falco’s assessment that there is no viable path forward for further coordination between The C++ Alliance and The Boost Foundation. We do, however, wish Mr. Falco and the Alliance all the best in their continued efforts to improve the C++ ecosystem. Sincerely, The Boost Foundation Board of Directors

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boost::any_cast gives build errors with VS2022, boost v1.82 and C++17
by Bhuyan, Jyotideep 01 Jul '24

01 Jul '24

Hi, I was using VS2019, boost v1.78, and C++14 version and the below code was working well. Same code gives build error with VS2022, boost v1.82, and C++17 due to "o << *boost::any_cast<T>(&a); " Instruction. I wanted to know why it behaves differently. Code : class any_out { struct streamer { virtual void print(std::ostream& o, const boost::any& a) = 0; virtual streamer* clone() = 0; virtual ~streamer() {} }; public: any_out() : m_streamer(nullptr) { } ~any_out() { delete m_streamer; } template <typename T> any_out(const T& value) : m_streamer(new streamer_imp<T>), m_object(value) { } any_out(const any_out& a) : m_streamer(a.m_streamer ? a.m_streamer->clone() : nullptr), m_object(a.m_object) { } template <typename T> any_out& operator=(const T& r) { any_out(r).swap(*this); return *this; } any_out& operator=(const any_out& r) { any_out(r).swap(*this); return *this; } any_out& swap(any_out& r) noexcept { std::swap(m_streamer, r.m_streamer); std::swap(m_object, r.m_object); return *this; } friend std::ostream& operator<<(std::ostream& o, const any_out& a) { if(a.m_streamer) { a.m_streamer->print(o, a.m_object); } return o; } boost::any& get() { return m_object; } const boost::any get()const { return m_object; } bool empty() const { return m_object.empty(); } private: template <typename T> struct streamer_imp : public streamer { virtual void print(std::ostream& o, const boost::any& a) { try { if (a.empty()) { o << "<empty>"; } else { o << *boost::any_cast<T>(&a); } } } virtual streamer* clone() { return new streamer_imp<T>(); } }; // Members streamer* m_streamer; boost::any m_object; }; I have migrated to VS2022, boost v1.82, and C++17, and due to a build error, I have changed the code below. virtual void print(std::ostream& o, const boost::any& a) { try { if (a.empty()) { o << "<empty>"; } else { o << boost::any_cast<T*>(a); } } } any_out anyTest; anyTest = 100; std::string actualStr; actualStr = make_string() << anyTest; actualStr prints nullptr (0000000) instated of value 100 for VS2022, boost v1.82 and C++17 Best Regards, Jyotideep (JD) Please be advised that this email may contain confidential information. If you are not the intended recipient, please notify us by email by replying to the sender and delete this message. The sender disclaims that the content of this email constitutes an offer to enter into, or the acceptance of, any agreement; provided that the foregoing does not invalidate the binding effect of any digital or other electronic reproduction of a manual signature that is included in any attachment. Confidential - Company Proprietary

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FYI: recent VS2022 17.10.x gives "Boost toolset is unknown (compiler MSVC 19.40.33808.0)" warning - due to Microsoft changing of the toolset version
by Dennis Luehring 21 Jun '24

21 Jun '24

...using Boost only CMake configure The MSVC toolset will increment its minor version number from|19.39|(VS 2022 v17.9) to|19.40|(VS 2022 v17.10). https://devblogs.microsoft.com/cppblog/msvc-toolset-minor-version-number-14… is still useable - did not check if building boost is a problem

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[boost.QVM] can you explain quaternions in the docs?
by Andrzej Krzemienski 19 Jun '24

19 Jun '24

Hi Everyone, I landed on this library docs when trying to learn what quarterions are for. Although the library has a vast documentation it doesn't explain what quaternions are and why they are used. When I was taught algebra for the purpose of computer graphics, vectors and matrices were on the table, but no quaternions. The examples show that I need to create a quaternion only to turn it into a rotation matrix. I am pretty sure there has to be more to it. Could I request an introduction section in the docs that would explain what quaternions are and why one would want to use them? The corresponding GitHub issue: https://github.com/boostorg/qvm/issues/51 Regards, &rzej;

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CppCast: Boost, The Beman Project and Beyond
by Niall Douglas 16 Jun '24

16 Jun '24

Given that some on here were expressing surprise at recent goings on, I thought in case nobody had seen it yet listening to this might be useful: https://cppcast.com/boost-the_beman_project_and_beyond/ Our own Zach Laine explains some of what's been going on behind the scenes. Niall

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[Newbie] Problem receiving data with asio::serial_port
by Stefano Mora 14 Jun '24

14 Jun '24

Hi all, I’m writing a Qt application running on both Windows and MacOs platforms. The application is based on CMake project that includes boost-asio package 1.84.0 by vcpkg packager. The application must communicate with a board by USB cable = virtual serial port. I’m handling the communication with a small wrap around the asio::serial_port object, found in sample https://github.com/fedetft/serial-port/tree/master/2_with_timeout The problem is on MacOS platform; Windows version works correctly. The problem is that after some data exchanges (they are correct) the program does not receive a reply (with the TIMEOUT exception) and, after that, it receives only system_error = 89. This is a chunk of my log: ... ( I send a command and I receive the reply) [ReceiveLog] start [TP] start SendCommand 'log export' [WriteCommand] Byte[] Write - cmd: 'log export' [WaitForResponse] ms 1000 RX [34] : ' log export -> XModem receive file' [SendCommand] response: ' log export -> XModem receive file' [ReceiveLog] response1: 'XModem receive file' matching: 'XModem receive file' [ReceiveLog] ok -> XMODEM (now I send a byte to start the data from the board - 3 attempts) > Write BEGIN DATA RECEIVE .. [WaitForXModemResponse] ms 4000 [WaitForXModemResponse] TIMEOUT TO diff: 4 > Write BEGIN DATA RECEIVE .. [WaitForXModemResponse] ms 4000 [ToSerial][readCompleted] error system:89 [ToSerial][readCompleted] byteTransf 0 [WaitForXModemResponse] Boost System_error > Write BEGIN DATA RECEIVE .. [WaitForXModemResponse] ms 4000 [ToSerial][readCompleted] error system:89 [ToSerial][readCompleted] byteTransf 0 [WaitForXModemResponse] Boost System_error [TP][ReceiveLog] start XMODEM: 0 (now I sent an ACK, just to try ...) [WaitForXModemResponse] ms 1000 [ToSerial][readCompleted] error system:89 [ToSerial][readCompleted] byteTransf 0 [WaitForXModemResponse] Boost System_error [dlThread] ReceiveLog ret: 0 The read function is simply set the timeout and read 133 bytes: ... _serialPort.setTimeout( boost::posix_time::millisec(timeout)); char data[XMODEM_PACKET_LENGTH]; try { _serialPort.read( data, XMODEM_PACKET_LENGTH); ... } catch(timeout_exception){ ... } catch(boost::system::system_error){ ...} Please what error 89 means (in MACos context)? Any idea on how to exit from this situation? Thanks! Regards

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