I was immediately put off by the Spanish version when I saw it was called "rústico", which does not translate to rust at all, it means rustic. The Spanish word for rust would be "óxido".
"Rustic" is actually a very common term in the Rust community, though it's an obvious joke drawing on 'Pythonic'. But there's nothing inherently wrong with "Rústico" as a name for a programming language.
In base 2 (and only base 2), denom(b) >= b-1, so the "fractional part" (b-1)/denom(b) carries into the 1's (units) place, which then carries into the 2's (b's) place, flipping both bits.
I'm quite aware of the existence of compilers, having worked on bootstrapping a production LISP compiler in the past. My point being that this would be an interesting experiment to do this "naïvely", given how close C is to (for example) PDP-11 assembly code.
presumably the derivation would involve a cryptographically secure, non-reversible function so as to not compromise the secret should one of them be leaked.
They link to an old article [1] that was featured in HN [2] somewhat recently, in which there's a workaround for older standards with regards to typeof.
They mention using this as the backing array for a power-of-two-sized hash table, but I don't think it would be very useful considering that the hash table won't provide stable pointers, given that you would need to rehash every element as the table grows.
Even if you just wanted to reuse the memory, rehashing in-place would be a PITA.