Add cloneUnderlying method to Namespace

This adds a method, cloneUnderlying, to Namespace that returns a copy of
the underlying mutable.HashSet. This is useful for constructing a
Namespace that you would like to manipulate manually without using
Namespace's methods to generate temporaries.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/main/scala/firrtl/Namespace.scala b/src/main/scala/firrtl/Namespace.scala
index f40748c2..cc5d8967 100644
--- a/src/main/scala/firrtl/Namespace.scala
+++ b/src/main/scala/firrtl/Namespace.scala
@@ -39,6 +39,11 @@ class Namespace private {
   }
 
   def newTemp: String = newName(tempNamePrefix)
+
+  /** Create a copy of the [[scala.collection.mutable.HashSet HashSet]] backing this [[Namespace]]
+    * @return a copy of the underlying [[scala.collection.mutable.HashSet HashSet]]
+    */
+  def cloneUnderlying: mutable.HashSet[String] = namespace.clone
 }
 
 /* TODO(azidar): Make Namespace return unique names that will not conflict with expanded