[−][src]Macro rslexer::rules
rules!
macro to create Rules for the lexer!
rules!
expects a Type (Token) and a list of rules:
&str (regex) => |string, line, character| Option
Example:
enum Token {
Word(String, usize, usize),
}
rules!(Token;
r"\s+" => |_,_,_| None,
r"[^\s]+" => |s, l, c| Some(Token::Word(s.to_str(), l, c)),
)