# RSLexer # ### Simple lexer written in Rust! ### # Examples ```rs #[derive(Debug, PartialEq)] enum Token { Number, Word{word: String, line: usize, character: usize}, } #[test] fn str_test() { // The result of the lex function is a Result, String>! let ts: Vec = lex( // The &str to be lexed! "test 12 21 text\n w2\n3", // A Vec of Rules, jus use the rules! macro! // rules! expects a Type (Token) and a list of rules: // &str (regex) => |string, line, character| Option rules!(Token; r"\s+" => |_,_,_| None, r"\d+" => |_,_,_| Some(Token::Number), r"[^\s\d]+" => |s, l, c| Some(Token::Word{ word: s.to_string(), line: l, character: c }), ) ).expect("Ok([...])"); // test if equal! assert_eq!( vec![ Token::Word{ word: String::from("test"), line: 1, character: 1 }, Token::Number, Token::Number, Token::Word{ word: String::from("text"), line: 1, character: 12 }, Token::Word{ word: String::from("w"), line: 2, character: 2 }, Token::Number, Token::Number, ], ts ); } ``` # License # This software is available under the MIT license