[nine_k]

This is a recurring idea: "Parse, don't validate". Previously:

https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-va... (2019, using Haskell)

https://www.lelanthran.com/chap13/content.html (April 2025, using C)

[jetrink]

The author credits Alexis King at the beginning and links to that post.