Circle – A C++ compiler with compile-time imperative metaprogramming

Re:Circle – A C++ compiler with compile-time imperative meta... by adev_ on Wednesday May 06, 2020 @07:52AM (#23089930)

> MySQL (C)

MySQL and MariaDB are a mixed of C++ and C nowadays [^2] [^1]. Most Database reimplementation nowadays are C++, Go or more recently (Rust).

> - message buses: DBus (C)

ZeroMQ is C++, Same for gRPC (reference of RPC nowadays), same for Thrift [^4]

> - games

Almost all triple A use the Unreal Engine or an home made engine in C++. Even Unity that brand itself as C# uses some C++ internally.

> distributed systems

Almost all Distributed system in the HPC world is C++ or Julia nowadays, with a bit of Fortran surviving.

> - AI runtimes

AI means often GPU usage, GPU usage means CUDA, meaning C++. That's valid for the today three main contenders (Tensorflow, pyTorch, MXNet ) and they all provide a python API on top of C++.

> Now let's add one obvious category which was suspiciously left out from this list: operating systems: Unix, BSDs, Linux, Plan 9, Illumos, GNU Mach, Windows NT, XNU --- there is almost no C++ here (and any C++ that there is in just the last two).

C++ is also in Fushia (Google) and BeOS/Haiku. But OS are mainly C (or Rust nowaday) because kernel space. Exception handling is problematic in kernel space.

[^1]: https:/github.com/MariaDB/server [^2]: https://github.com/mysql/mysql-server [^3]: https://zeromq.org/ [^4]: https://github.com/facebook/fbthrift

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Re:Circle – A C++ compiler with compile-time imperative meta... by gpderetta on Wednesday May 06, 2020 @09:10AM (#23090481)

To add more:

Regarding DBs, there is also ScyllaDB which really take advantage of the modern C++ realtime application design.

DBus is just a spec, the reference implementation is in C, but for example QtDBus is in C++.

Also the original unix predates C++ by ten years at least [1], so it is unsurprising that all descendants (direct or not) are written in C.

[1] C was designed to implement unix in the first place.

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Re:Circle – A C++ compiler with compile-time imperative meta... by abjKT26nO8 on Wednesday May 06, 2020 @11:31AM (#23092127)

I'm not debating that there are a lot of projects written in C++. I only argue that C is enough to be able to learn about state-of-the-art tech in this area.

I'm not even going to debate C++'s merits at this point. Everybody's had enough of that already. There are people who stick to it and there are those who bailed after a while. It's just that, if I have a choice, I won't work with the people who belong to the former group.

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