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/* NSC -- new Scala compiler
* Copyright 2005-2013 LAMP/EPFL
* @author Martin Odersky
*/
package scala.reflect.internal
package util
import java.util.concurrent.ConcurrentHashMap
import java.util.concurrent.atomic.AtomicLong
import scala.reflect.NameTransformer
class FreshNameCreator(creatorPrefix: String = "") {
protected val counters = new ConcurrentHashMap[String, AtomicLong]()
/**
* 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 = NameTransformer.encode(prefix)
counters.putIfAbsent(safePrefix, new AtomicLong(0))
val idx = counters.get(safePrefix).incrementAndGet()
s"$creatorPrefix$safePrefix$idx"
}
}
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