My CppCon talk yesterday is now on YouTube. You can read more about in my July blog post on “Metaclasses: Thoughts on generative C++” which contains links to the current paper and some examples that work so far on the live prototype compiler cppx.godbolt.org.

Thanks again to Bjarne Stroustrup for making C++ so general and powerful with just a single kind of “class” (essential for this work), to Andrew Sutton for implementing the prototype metaclasses compiler, to Matt Godbolt for hosting it on his site, to everyone on the committee and in the community on whose work this is trying to build and have provided comments and feedback, and to Bash Films and CppCon for making these videos available so quickly. As in previous years, the CppCon videos will also be available on Channel 9 as well, though that usually takes a few extra weeks to happen.

[revised 9/8 to reflect that there is no need to wait till the next WG21 meeting]

As I mentioned in my Kona (March) trip report, WG21 (the ISO C++ committee) completed work on C++17 at our March meeting. At that point it was technically finalized, and since then we have been in the final procedural endgame of formal ISO approval and publication.

Today, I’m pleased to report that the last major ballot was completed: A few hours ago, the C++17 DIS (Draft International Standard) ballot came back with 100% approval, 23 editorial comments, and no technical comments. Unanimous approval of a DIS means that we get to skip the FDIS ballot (as we hoped) and proceed directly to publication. As far as ISO is concerned, we are now done and they are just waiting for us to update the document editorially and send them the final PDF we want to be published.

So the remaining steps are:

• The project editor (Richard Smith) and helpers will review and resolve the editorial comments, and any other pending editorial tweaks they feel like fixing (e.g., speling, formatting). This includes generating the official record of response paper summarizing what was done for each editorial DIS comment received.
• We send the final PDF to ISO for publication, and ISO after a month or two ISO publishes it in the ISO store.

Note again that all this is just formally putting a bow on C++17. WG21’s active project now is C++20, and we already began work on that at our last meeting in Toronto, including to add a major feature (concepts!), and we’ll continue serious work on that in Albuquerque and beyond.

This is a product of many people’s labors and many often-unsung efforts. Thank you again to the hundreds of participants in the ISO C++ committee, and many interested commenters and helpers in the community, for all your work and support for C++ standardization.

As I mentioned earlier, part of my fall schedule is to give a repeat of this spring’s sold-out seminar: “High-Performance and Low-Latency C++” (October 9-11, London, UK).

I am still getting mails about whether there are alternative/additional European dates for this seminar. Unfortunately, the answer is still no, but since I’m getting inquiries about it let me repeat that part of the earlier post:

On October 9-11, I’ll be in London giving a one-time repeat of “High-Performance and Low-Latency C++” (course details page). This is the same as the public course I gave in Stockholm [in April]; because that course sold out, and I was coming to Europe again for Qt World Summit anyway, we decided to do a single repeat that same week, this time in London.

Notes: (1) Some of you have emailed me asking if there will be other dates/cities, and the answer is no, sorry, I do seminars very rarely and this is the last one I have time to do for the foreseeable future. So if you are interested then this is the one to attend. (2) Some of you have also emailed me to ask whether the seminar will be recorded, and the answer is again no, sorry, the organizers are not set up for that. However, you can find all of my past Effective Concurrency writing (on which parts of this course are based) freely available via this blog, just search for that phrase or use the category tag — there’s a book’s worth of free material written by me in individual-article form.

So, if you’re interested, I hope you’ll be able to attend this October, and I look forward to seeing many of you there.