Move compiler and compiler tests to compiler dir

1 files changed, 24 insertions, 0 deletions

diff --git a/compiler/src/dotty/tools/package.scala b/compiler/src/dotty/tools/package.scala
new file mode 100644
index 000000000..5dae82b71
--- /dev/null
+++ b/compiler/src/dotty/tools/package.scala
@@ -0,0 +1,24 @@
+package dotty
+import scala.annotation.Annotation
+
+package object tools {
+  type FatalError = scala.reflect.internal.FatalError
+  val FatalError = scala.reflect.internal.FatalError
+
+  class sharable extends Annotation
+  class unshared extends Annotation
+
+  val ListOfNil = Nil :: Nil
+
+  /** True if two lists have the same length.  Since calling length on linear sequences
+   *  is O(n), it is an inadvisable way to test length equality.
+   */
+  final def sameLength[T](xs: List[T], ys: List[T]): Boolean = xs match {
+    case _ :: xs1 =>
+      ys match {
+        case _ :: ys1 => sameLength(xs1, ys1)
+        case _ => false
+      }
+    case _ => ys.isEmpty
+  }
+}