[][src]Function syntax::ext::tt::quoted::kleene_op

fn kleene_op(token: &Token) -> Option<KleeneOp>
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Takes a token and returns Some(KleeneOp) if the token is + * or ?. Otherwise, return None.