RegexParserExample.scala

/*
 *  This file can be compiled only in Scala 2.8.0 or later version.
 *  In Scala 2.7.X, this file cannot be compiled.
 */
import scala.util.parsing.combinator._
import scala.util.matching._

trait ImplicitDisabledRegexParsers {parsers: RegexParsers =>
  override def literal(s: String): Parser[String] = parsers.literal(s)
  override def regex(r: Regex): Parser[String] = parsers.regex(r)
}

object RegexParserExample extends RegexParsers
  with ImplicitDisabledRegexParsers {
  val ident: Parser[String] = regex("""[a-zA-Z_][a-zA-Z0-9_]*""".r)
  //The following line causes compilation error.
  //val ident: Parser[String] = """[a-zA-Z_][a-zA-Z0-9_]*""".r
}