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/* NSC -- new Scala compiler
* Copyright 2005-2009 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc.util
import scala.collection.mutable.HashMap
trait FreshNameCreator {
/** do not call before after type checking ends. Use newName(Position,String) instead. */
@deprecated def newName(prefix : String) : String
/** do not call before after type checking ends. Use newName(Position) instead. */
@deprecated def newName() : String
def newName(pos : util.Position, prefix : String) : String
def newName(pos : util.Position) : String
}
object FreshNameCreator {
class Default extends FreshNameCreator {
protected var counter = 0
protected val counters = new HashMap[String, Int]
/**
* Create a fresh name with the given prefix. It is guaranteed
* that the returned name has never been returned by a previous
* call to this function (provided the prefix does not end in a digit).
*/
def newName(prefix: String): String = {
val safePrefix = prefix.replace('<', '$').replace('>', '$')
val count = counters.getOrElse(safePrefix, 0) + 1
counters(safePrefix) = count
safePrefix + count
}
def newName(pos : util.Position, prefix : String) = newName(prefix)
def newName(pos : util.Position) = newName()
def newName(): String = {
counter = counter + 1
"$" + counter + "$"
}
}
}
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