I am absolutely advocating for arbitrary expressions, I should have made that even clearer in my example. Again, the burden is on the editors/compiler, but it m

I am absolutely advocating for arbitrary expressions, I should have made that even clearer in my example. Again, the burden is on the editors/compiler, but it massively simplifies life for the developer using the language. check/highlight is supported just fine for many languages that have this feature (it's likely that parts of Rust already require similar editor implementations for some other parts of its syntax).