And then rewrite it in Rust.

Would filter out trust, crust, …

That would be frustrating. Unless the matching is made case-sensitive, which would probably be a good idea when trying to filter out a proper name.

> frustrating

nice work

assuming people always case things correctly.

Why? You could just match on word boundaries '\bRust\b'

You would still get false positives with that but only regarding actual word semantics (i.e. articles mentioning Rust as oxidation process and not as programming language) but that's the tradeoff I guess

/([^a-z]|^)rust([^a-z]|$)/i