Jon Kalb

Jon is a freelance C++ trainer, who help organize C++ events (conferences and local meetings).

[Jon Kalb @_JonKalb]

The C++Now version of my “Code C++ Like a Library Author” talk is now up: https://t.co/MgDqGie5TQ

[LaurieWired @lauriewired]

My CppCon keynote went really well!

Fun times talking about new memory hierarchies and the best ways we can programmatically prepare for them in advance.

[Jon Kalb @_JonKalb]

CppCon 2026 Volunteer training. A CoC exercise on a hypothetical incident of someone posting a photo of another without permission. This photo posted without permission.

[Jon Kalb @_JonKalb]

I’m a missionary for C++. https://t.co/24gBvDJM48

[Jon Kalb @_JonKalb]

Every Thursday immediately before CppCon, we invite members of the Denver C++ Meetup to join us for dinner at the Gaylord Rockies. (Note: Not everyone present is in the photo and not everyone in the photo was present.)

https://t.co/9Ilc0zyJp9

[Jon Kalb @_JonKalb]

This is where CppCon hibernates between Septembers.

[Jon Kalb @_JonKalb]

The arrangement with Karen Krueger and Aaron Robinson is that they do all the work on CppCon and I get all the credit. This arrangement has worked out really well for me.

[Jon Kalb @_JonKalb]

Returning to the Gaylord Rockies for CppCon 2026!

[Boost C++ | Open Source Libraries @Boost_Libraries]

The politics of the committee. The dedication of decades. The flow of solving the unsolvable, featuring some of "the brightest people you'll ever want to meet"

🎬 First audience preview screening
📅 September 16, 2026
📍 Exclusively for @CppCon attendees

https://t.co/YiShqOho5j

#cpp

[Boost C++ | Open Source Libraries @Boost_Libraries]

"If I were to tell a story about Boost, I'd start with the people."

Today we're sharing the official teaser for the Boost documentary. A film about the people, the politics, and the decades of work behind possibly the most important open source library you've never heard of 🎥👇

[Boost C++ | Open Source Libraries @Boost_Libraries]

std::vector always heap allocates. std::array can't change size. For decades, there's been no standard container that gives you a dynamically sized array with a compile-time capacity limit and zero heap allocation

C++26 finally adds std::inplace_vector. Guess where they got the idea 🧵👇

[Jon Kalb @_JonKalb]

@MatRopert @blelbach @joaquintdig That double standard isn’t coming from me. Asio is arguably existing practice and, therefore, a candidate for ISO. But I’m not convinced that the benefit is worth the cost. There are benefits to leaving it in Boost.

[Jon Kalb @_JonKalb]

@MatRopert @blelbach @joaquintdig The mandate of the committee is to standardize existing practice. For language features, this is problematic, but for libraries—nothing should go in that is not already in Boost (or a comparable source). The committee should fine-tuning not inventing.

[Jon Kalb @_JonKalb]

@MatRopert @blelbach Education is what I’m about. 😁

[Jon Kalb @_JonKalb]

@MatRopert @blelbach @joaquintdig I agree. We need to stop putting containers (or anything else that ages poorly) in the standard. But we also need to teach people the value of Boost and other premium resources.

[Jon Kalb @_JonKalb]

@MatRopert @blelbach We certainly do need to train people to use Boost.

[Jon Kalb @_JonKalb]

@MatRopert @blelbach The standard has laid out the conventions that are the STL. It has a few (too many) containers, iterators, and algorithms. Now go forth and create your own. And if/when they are good enough, put them in Boost. The standard is the wrong place for every library that is a good idea.

[Jon Kalb @_JonKalb]

@Alecazam123 @blelbach Have you not looked at Boost?

[Jon Kalb @_JonKalb]

@MatRopert @blelbach It doesn’t belong in the standard. That doesn’t mean that there is anything “wrong” with it.

[Bryce, the CUDA Colonel @blelbach]

I tried to stop std::hive.

When it became clear I couldn't, I tried to keep them for baking in a design that forced a particular implementation.

std::hive doesn't belong in the C++ standard library.