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

Add "enum" construct

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/run/enum-approx.scala b/tests/run/enum-approx.scala
new file mode 100644
index 000000000..7811b3909
--- /dev/null
+++ b/tests/run/enum-approx.scala
@@ -0,0 +1,22 @@
+enum class Fun[-T, +U >: Null] {
+  def f: T => U = null
+}
+object Fun {
+  case Identity[T, U >: Null](override val f: T => U) extends Fun[T, U]
+  case ConstNull {
+    override def f = x => null
+  }
+  case ConstNullClass() {
+    override def f = x => null
+  }
+  case ConstNullSimple
+}
+
+object Test {
+  def main(args: Array[String]) = {
+    val x: Null = Fun.ConstNull.f("abc")
+    val y: Null = Fun.ConstNullClass().f("abc")
+    assert(Fun.ConstNullSimple.f == null)
+  }
+}
+