Is anyone still using the CTRE library in 2026?

Back in 2019 an engineer/committee member made a splash by introducing CTRE, Compile Time Regular Expressions.

It was implemented using type aliases instead of constexpr function calls meaning it was easy to implement in C++11. Very impressive stuff.

It also gave you a nicer callsite spelling in C++20 leveraging generalized non-type template parameter passing.

I'm curious if anyone is still using it. If no, why not? I'd love to hear!

https://redd.it/1t05xxt
@r_cpp