src/library/scala/util/parsing/input/Positional.scala


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2006-2010, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |                                         **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala.util.parsing.input

/** A trait for objects that have a source position.
 *
 * @author Martin Odersky, Adriaan Moors
 */
trait Positional {

  /** The source position of this object, initially set to undefined. */
  var pos: Position = NoPosition

  /** If current source position is undefined, update it with given position `newpos'
   *  @return  the object itself
   */
  def setPos(newpos: Position): this.type = {
    if (pos eq NoPosition) pos = newpos
    this
  }
}