A C++23 implementation that may be interesting to add to the documentation

[w0utert]

Hi,

I recently wrote a C++23 implementation of the parinfer algorithm which may be interesting to mention & link in the documentation, it is called cpparinfer and you can find it here [1]

This implementation could be useful to people who want to integrate parinfer into a C++ application or with a little bit of additional effort some other compiled langue. Of note is that I implemented the algorithm from scratch without trying to copy or even look at the original JavaScript implementation. As a result, cpparinfer works a bit differently from parinfer.js as it does not operate on the character-level, but first tokenizes the input, then indent mode and paren mode operate directly on that without having to do any kind of string manipulation.

cpparinfer implements (and passes ;-) all parinfer.js indent mode and paren mode test cases except those that cover features that are not implemented yet, which are (as far as I know) only custom paren-, and comment chars, returning tab stops, and smart mode. I will probably implement these later except for smart mode as it is not really clear to me whether smart mode is still an experimental feature or that is actually considered useful & stable.

[1] https://gitlab.com/w0utert/cpparinfer

[shaunlebron]

Beautiful! Thank you for letting me know.

the current algorithm chews through decently sized (100K+ SLOC) LISP source files in less than a millisecond

Oof! Wow, very nice

[w0utert]

Just FYI, I recently also implemented smart mode for cpparinfer. Feel free to mention in the docs if they are updated at some point.

[shaunlebron]

@w0utert fantastic, thank you! I just added it to the readme in the commit above. Any integration with an editor yet?

[w0utert]

@shaunlebron Thanks! There is no editor integration yet, I was planning to use this in a custom embedded edit control in an ImGui application I was working on, but reproducing all features of your algorithm became a bit of an out-of-hand side-quest that absorbed all my time. It's not an easy algorithm to reproduce from scratch ;-)

I still want to add C-ABI interfaces to simplify embedding this anywhere, hopefully that will makes this useful for someone writing an editor/plugin at some point.