Accessing Scala Parser regular expression match data

I wondering if it's possible to get the MatchData generated from the matching regular expression in the grammar below.

object DateParser extends JavaTokenParsers {

    ....

    val dateLiteral = """(\d{4}[-/])?(\d\d[-/])?(\d\d)""".r ^^ {
        ... get MatchData
    }
}

One option of course is to perform the match again inside the block, but since the RegexParser has already performed the match I'm hoping that it passes the MatchData to the block, or stores it?