Merge pull request #1364 from dotty-staging/exhaustivity2

Implementation of exhaustivity and redundancy check

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/patmat/t9351.scala b/tests/patmat/t9351.scala
new file mode 100644
index 000000000..9b9bd4312
--- /dev/null
+++ b/tests/patmat/t9351.scala
@@ -0,0 +1,35 @@
+trait A {}
+case object B extends A {}
+case object C extends A {}
+
+class X {
+  def good = {
+    val a: A = B
+    a match {
+      case B =>
+      case C =>
+    }
+  }
+
+  def bad = {
+    val a: A = B
+    val o: Option[Int] = None
+    (a, o) match {
+      case (B, None) =>
+      case (B, Some(_)) =>
+      case (C, None) =>
+      case (C, Some(_)) =>
+    }
+  }
+
+  def alsoGood = {
+    val a: A = B
+    val b: A = C
+    (a, b) match {
+      case (B, B) =>
+      case (B, C) =>
+      case (C, B) =>
+      case (C, C) =>
+    }
+  }
+}