1 files changed, 13 insertions, 0 deletions
diff --git a/core/src/main/scala/chisel3/Printable.scala b/core/src/main/scala/chisel3/Printable.scala
index 78655517..82054ee1 100644
--- a/core/src/main/scala/chisel3/Printable.scala
+++ b/core/src/main/scala/chisel3/Printable.scala
@@ -134,6 +134,19 @@ object Printable {
     val bufEscapeBackSlash = buf.map(_.replace("\\", "\\\\"))
     StringContext(bufEscapeBackSlash.toSeq: _*).cf(data: _*)
   }
+
+  private[chisel3] def checkScope(message: Printable): Unit = {
+    def getData(x: Printable): Seq[Data] = {
+      x match {
+        case y: FirrtlFormat => Seq(y.bits)
+        case Name(d)       => Seq(d)
+        case FullName(d)   => Seq(d)
+        case Printables(p) => p.flatMap(getData(_)).toSeq
+        case _             => Seq() // Handles subtypes PString and Percent
+      }
+    }
+    getData(message).foreach(_.requireVisible())
+  }
 }
 
 case class Printables(pables: Iterable[Printable]) extends Printable {