From 0d00420ba2d00a957ace9112ab570fe52abea9d3 Mon Sep 17 00:00:00 2001
From: Jim Lawson
Date: Thu, 28 Mar 2019 09:32:42 -0700
Subject: Make core.DontCare private to chisel3 (#1054)

Force clients to access 'DontCare' through the chisel3 package to ensure it's created as a chisel3 object and not a client object.---
 chiselFrontend/src/main/scala/chisel3/core/Data.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'chiselFrontend')

diff --git a/chiselFrontend/src/main/scala/chisel3/core/Data.scala b/chiselFrontend/src/main/scala/chisel3/core/Data.scala
index ee8c90a1..daa89045 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Data.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Data.scala
@@ -670,9 +670,10 @@ object WireDefault {
 /** RHS (source) for Invalidate API.
   * Causes connection logic to emit a DefInvalid when connected to an output port (or wire).
   */
-object DontCare extends Element {
+private[chisel3] object DontCare extends Element {
   // This object should be initialized before we execute any user code that refers to it,
   //  otherwise this "Chisel" object will end up on the UserModule's id list.
+  // We make it private to chisel3 so it has to be accessed through the package object.
 
   private[chisel3] override val width: Width = UnknownWidth()
 
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