I've created one now, awaiting review.

I've created a Rust translation for this kata, please review and approve!

I ported some of the test suite improvements back to the Python version; the decoding of the test puzzles was simplified by quite some distance.

How about 12? will it be passed by this regex?

Declare function pointers with empty parameter list to allow the actual functions having different parameter type

This has never been a robust way to do things and C23 will remove support for empty parameter lists (() will become an alias for (void)). The proper way to upgrade this kata to conform to C23 is to modify the parameter lists of the vtable pointers so that they take a void * (destroy()) / const void * (get_area() / get_perimeter()) parameter and let the implementation functions cast that argument to the correct type, as is usual for type-generic functions in C, in the same fashion as qsort()'s comparison functions.

i thought the author was well known for adding twists to existing problems

Love this. It's clean and very understandable - with no extra libraries.

Why should there be a difference? Do they own problems?

what is the difference between this and the project euler one

I hate this.

holy crap - how did I miss out on this lol

Very clever! Good catch that you didn't need to translate '456', as their position remains the same.

wow, it's clever

Funny dynamic programming problem to exercise with.

That is Sierpinsky (fractal) triangle, most of the entries don't matter, you should find a way to drop these spaces.
To realize this, you may examine binomial coefficients by modulo 3.
I cannot understand most of the solutions, at least from first glance, and my own solution is rather intuitive

This translation has been rejected some time ago