{"id":58404,"library":"regex-automata","title":"regex-automata","description":"Automata construction and matching using regular expressions.","status":"active","version":"0.4.14","language":"rust","source_language":null,"source_url":"https://github.com/rust-lang/regex","tags":["regex","automata","dfa","nfa","pattern-matching"],"install":[{"cmd":"# Cargo.toml\n[dependencies]\nregex-automata = \"0.4.14\"","lang":"toml","label":"Cargo.toml"},{"cmd":"cargo add regex-automata","lang":"bash","label":"cargo add"}],"dependencies":[],"imports":[{"symbol":"Automaton","correct":"use regex_automata::dfa::Automaton;"}],"quickstart":{"code":"use regex_automata::dfa::Automaton;\nuse regex_automata::dfa::dense::DFA;\n\nfn main() {\n    let dfa = DFA::new(r\"[0-9]+\").unwrap();\n    let state = dfa.start_state();\n    println!(\"DFA created, start state: {:?}\", state);\n}","lang":"rust","description":"Create a DFA from a regex pattern."},"warnings":[{"fix":"Consider using `regex::Regex` for simpler use cases.","message":"The API is low-level and complex; most users should use the `regex` crate instead.","severity":"gotcha","affected_versions":">=0.1.0"}],"env_vars":null,"search_vec":"'automata':3,4,12 'construct':5 'dfa':13 'express':10 'match':7,17 'nfa':14 'pattern':16 'pattern-match':15 'regex':2,11 'regex-automata':1 'regular':9 'use':8","created_at":"2026-06-16T16:22:43.607811+00:00","updated_at":"2026-06-16T16:22:43.607811+00:00","problems":[],"ecosystem":"crates","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://github.com/rust-lang/regex/tree/master/regex-automata","github":"https://github.com/rust-lang/regex","docs":"https://docs.rs/regex-automata/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["utility"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-16","next_check":"2026-12-13","install_tag":null}}