1 files changed, 26 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/ast/FreeVars.scala b/src/compiler/scala/tools/nsc/ast/FreeVars.scala
new file mode 100644
index 0000000000..1bf36e8bf2
--- /dev/null
+++ b/src/compiler/scala/tools/nsc/ast/FreeVars.scala
@@ -0,0 +1,26 @@
+package scala.tools.nsc
+package ast
+
+trait FreeVars extends reflect.internal.FreeVars { self: Global =>
+
+  import self._
+  import definitions._
+  import treeInfo._
+
+  def logFreeVars(position: Position, reified: Tree): Unit = {
+    if (settings.logFreeTerms.value || settings.logFreeTypes.value) {
+      reified match {
+        case Reified(_, symbolTable, _) =>
+          // logging free vars only when they are untyped prevents avalanches of duplicate messages
+          symbolTable foreach {
+            case FreeTermDef(_, _, binding, origin) if settings.logFreeTerms.value && binding.tpe == null =>
+              reporter.echo(position, "free term: %s %s".format(showRaw(binding), origin))
+            case FreeTypeDef(_, _, binding, origin) if settings.logFreeTypes.value && binding.tpe == null =>
+              reporter.echo(position, "free type: %s %s".format(showRaw(binding), origin))
+            case _ =>
+              // do nothing
+          }
+      }
+    }
+  }
+}
+\ No newline at end of file