Miss Dada  🏳️‍⚧️

Is there a way to use the Unicode tables in the Rust regex crate to match a single char without turning it into a String or &str? It seems like the internals must have a way to do this, but perhaps not exposed? Is there a trick?

(And you are right that regex crate knows what a Unicode codepoint is. It is, in fact, the fundamental atom of a match for Unicode regexes. This is not as good as using grapheme clusters, but is easier to implement!)

Is it ridiculous to consider exposing a "codepoint match" facility? Or did I just not understand something about what makes matching the `char` type to a codepoint difficult? (the ontology is complicated enough that I could be missing a mismatch somewhere)

I don't know if I would use the term 'ridiculous' necessarily, but I think I would need some compelling evidence to motivate it. There's some incongruities to consider (like regexes that never match a single codepoint), and whether it's really worth a new API item.

e.g., If there was an example that said, "match on a specific codepoint by doing `http://re.is _match(codepoint.encode_utf8(&mut [0; 4]))`" that might be enough. https://play.rust-lang.org/?gist=79cd9455d12d186af21ae685f6f909fb&version=stable …

I would never have thought to turn a char into a &str that way! I wonder if it means we should add char as_str(&self) -> &str

Hmm. Don't think that would work. You would need to return an array, but we don't have a type for "fixed size array whose contents are guaranteed to be UTF-8."