}
/// A delimiter token.
-#[derive(Clone, PartialEq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]
+#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]
pub enum DelimToken {
/// A round parenthesis (i.e., `(` or `)`).
Paren,