I had some fun recently using (abusing?) `constexpr` to process string literals at compile time to ‘compress’ then in the binary and save a few bytes in my microcontroller.
https://gist.github.com/th-in-gs/7f2104440aa02dd36264ed6bc38...
I’m just shaving some bits off - but I guess in principle you could do anything that’s `constexpr` evaluatable. Gzip compression of static buffers?…
Godbolt example:
This is the intended purpose of the feature. gzip may be a little aggressive given that you have to unzip it again at the other end but its very possible (and potentially not even as expensive as one might expect given that these types of compression algorithms can be tuned on a speed/size tradeoff and backoff when struggling to compress).
https://github.com/PhilippeSigaud/Pegged is a D library that generates a parser generator for you based on a grammar (string) at compile time.