1 files changed, 21 insertions, 0 deletions
diff --git a/library/src/scala/runtime/EnumValues.scala b/library/src/scala/runtime/EnumValues.scala
new file mode 100644
index 000000000..6f9d907b3
--- /dev/null
+++ b/library/src/scala/runtime/EnumValues.scala
@@ -0,0 +1,21 @@
+package scala.runtime
+
+import scala.collection.immutable.Map
+
+class EnumValues[E <: Enum] {
+  private var myMap: Map[Int, E] = Map()
+  private var fromNameCache: Map[String, E] = null
+
+  def register(v: E) = {
+    require(!myMap.contains(v.enumTag))
+    myMap = myMap.updated(v.enumTag, v)
+    fromNameCache = null
+  }
+
+  def fromInt: Map[Int, E] = myMap
+  def fromName: Map[String, E] = {
+    if (fromNameCache == null) fromNameCache = myMap.values.map(v => v.toString -> v).toMap
+    fromNameCache
+  }
+  def values: Iterable[E] = myMap.values
+}