Funnily this reminds me of how racket defines a language (https://beautifulracket.com/explainer/lang-line.html https://beautifulracket.com/explainer/lang-line.h

Funnily this reminds me of how racket defines a language (https://beautifulracket.com/explainer/lang-line.html https://beautifulracket.com/explainer/lang-line.html). Or how basically a shebang line does the same for any kind of script (https://en.wikipedia.org/wiki/Shebang_(Unix) https://en.wikipedia.org/wiki/Shebang_(Unix)).