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package examples.parsing
import scala.util.parsing.combinator1.syntactical.StandardTokenParsers
object ListParsers extends StandardTokenParsers {
lexical.delimiters ++= List("(", ")", ",")
def expr: Parser[Any] = "(" ~ exprs ~ ")" | ident | numericLit
def exprs: Parser[Any] = expr ~ rep ("," ~ expr)
def main(args: Array[String]) {
val tokens = new lexical.Scanner(args(0))
println(args(0))
println(phrase(expr)(tokens))
}
}
object ListParsers1 extends StandardTokenParsers {
lexical.delimiters ++= List("(", ")", ",")
def expr: Parser[Any] = "(" ~> exprs <~ ")" | ident | numericLit
def exprs: Parser[List[Any]] = expr ~ rep ("," ~> expr) ^^ { case x ~ y => x :: y }
def main(args: Array[String]) {
val tokens = new lexical.Scanner(args(0))
println(args(0))
println(phrase(expr)(tokens))
}
}
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