Merge pull request #1958 from dotty-staging/add-enum

Add "enum" construct

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/run/enum-Option.scala b/tests/run/enum-Option.scala
new file mode 100644
index 000000000..76f5641b3
--- /dev/null
+++ b/tests/run/enum-Option.scala
@@ -0,0 +1,19 @@
+enum class Option[+T >: Null] extends Serializable {
+   def isDefined: Boolean
+}
+object Option {
+  def apply[T >: Null](x: T): Option[T] = if (x == null) None else Some(x)
+  case Some(x: T) {
+     def isDefined = true
+  }
+  case None {
+     def isDefined = false
+  }
+}
+
+object Test {
+  def main(args: Array[String]) = {
+    assert(Some(None).isDefined)
+    Option("22") match { case Option.Some(x) => assert(x == "22") }
+  }
+}