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/* NSC -- new Scala compiler
* Copyright 2005-2013 LAMP/EPFL
* @author Martin Odersky
*/
package scala.tools.nsc
package util
import scala.collection.mutable
trait FreshNameCreator {
/** Do not call before after type checking ends.
* PP: I think that directive needs to lose a word somewhere.
*/
def newName(): String
def newName(prefix: String): String
@deprecated("use newName(prefix)", "2.9.0")
def newName(pos: scala.reflect.internal.util.Position, prefix: String): String = newName(prefix)
@deprecated("use newName()", "2.9.0")
def newName(pos: scala.reflect.internal.util.Position): String = newName()
}
object FreshNameCreator {
class Default extends FreshNameCreator {
protected var counter = 0
protected val counters = mutable.HashMap[String, Int]() withDefaultValue 0
/**
* 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.replaceAll("""[<>]""", """\$""")
counters(safePrefix) += 1
safePrefix + counters(safePrefix)
}
def newName(): String = {
counter += 1
"$" + counter + "$"
}
}
}
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