Scala example source code file (Delimited.scala)

This example Scala source code file (Delimited.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

argumentdelimiter, argumentlist, boolean, boolean, char, char, charsequence, delimited, int, int, list, list, nil, parsed

The Scala Delimited.scala source code

/* NSC -- new Scala compiler
 * Copyright 2005-2011 LAMP/EPFL
 * @author Paul Phillips
 */
 
package scala.tools.nsc
package interpreter

import scala.tools.jline.console.completer.ArgumentCompleter.{ ArgumentDelimiter, ArgumentList }

class JLineDelimiter extends ArgumentDelimiter {
  def toJLine(args: List[String], cursor: Int) = args match {
    case Nil    => new ArgumentList(new Array[String](0), 0, 0, cursor)
    case xs     => new ArgumentList(xs.toArray, xs.size - 1, xs.last.length, cursor)
  }

  def delimit(buffer: CharSequence, cursor: Int) = {
    val p = Parsed(buffer.toString, cursor)
    toJLine(p.args, cursor)
  }
  def isDelimiter(buffer: CharSequence, cursor: Int) = Parsed(buffer.toString, cursor).isDelimiter
}

trait Delimited {
  self: Parsed =>
  
  def delimited: Char => Boolean
  def escapeChars: List[Char] = List('\\')
  def quoteChars: List[(Char, Char)] = List(('\'', '\''), ('"', '"'))
  
  /** Break String into args based on delimiting function.
   */
  protected def toArgs(s: String): List[String] = 
    if (s == "") Nil
    else (s indexWhere isDelimiterChar) match {
      case -1   => List(s)
      case idx  => (s take idx) :: toArgs(s drop (idx + 1))
    }
  
  def isDelimiterChar(ch: Char) = delimited(ch)
  def isEscapeChar(ch: Char): Boolean = escapeChars contains ch
  def isQuoteStart(ch: Char): Boolean = quoteChars map (_._1) contains ch
  def isQuoteEnd(ch: Char): Boolean = quoteChars map (_._2) contains ch
}