1 files changed, 33 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/util/FreshNameCreator.scala b/src/compiler/scala/tools/nsc/util/FreshNameCreator.scala
new file mode 100644
index 0000000000..8215941256
--- /dev/null
+++ b/src/compiler/scala/tools/nsc/util/FreshNameCreator.scala
@@ -0,0 +1,33 @@
+/* NSC -- new scala compiler
+ * Copyright 2005 LAMP/EPFL
+ * @author  Martin Odersky
+ */
+// $Id$
+package scala.tools.nsc.util;
+
+import scala.collection.mutable.HashMap;
+
+class 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 count = counters.get(prefix) match {
+      case Some(last) => last + 1
+      case None => 0
+    }
+    counters.update(prefix, count);
+    prefix + count
+  }
+
+  def newName(): String = {
+    counter = counter + 1;
+    "$" + counter + "$"
+  }
+}