Untitled

// vim:set noet sw=3 ts=3 sts=3

 

import scala.util.parsing.combinator._

import java.io.FileReader

 

class XselfParser extends RegexParsers {

        def expression: Parser[Any] = opt("(")~rep(identifier)~opt(")")

        def identifier: Parser[Any] = rep("""[a-zA-Z0-9]""".r | symbol)

        def symbol:     Parser[Any] = "~" | "!" | "@" | "$" | "%" | "^" | "&" | "*" | "-" | "_" | "=" | "+" | "|" | ":" | "<" | ">" | "/" | "?"

}

 

object Xself extends XselfParser {

        def main(args: Array[String]) {

                val reader = new FileReader(args(0))

                println(parseAll(expression, reader))

        }

}