//! Language engine: symbol classes, terms, derivatives, automata, matching.
//!
//! Design note: pattern syntax trees are lowered to normalised extended
//! regular-expression terms ([`term`]); a lazily explored derivative automaton
//! ([`dfa`]) answers matching in linear time and minimises to a canonical form
//! whose hash is the language fingerprint. Everything is bounded by
//! [`limits`].
pub use Alphabet;
pub use ;
pub use ;