Move compiler and compiler tests to compiler dir

1 files changed, 33 insertions, 0 deletions

diff --git a/compiler/src/dotty/tools/dotc/util/FreshNameCreator.scala b/compiler/src/dotty/tools/dotc/util/FreshNameCreator.scala
new file mode 100644
index 000000000..521947895
--- /dev/null
+++ b/compiler/src/dotty/tools/dotc/util/FreshNameCreator.scala
@@ -0,0 +1,33 @@
+package dotty.tools
+package dotc
+package util
+
+import scala.collection.mutable
+
+trait FreshNameCreator {
+  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.AnyRefMap[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
+      val counter = counters(safePrefix)
+      if (prefix.isEmpty) "$" + counter + "$" else safePrefix + counter
+    }
+  }
+}