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/* NSC -- new Scala compiler
* Copyright 2005-2009 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc
package util
import scala.collection.mutable.HashMap
trait FreshNameCreator {
/** do not call before after type checking ends.
*/
@deprecated("use newName(Position, String) instead")
def newName(prefix: String): String
/** do not call before after type checking ends.
*/
@deprecated("use newName(Position) instead")
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 += 1
"$" + counter + "$"
}
}
}
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