From fb1bebfe2807cf5b1fd842b4418b91bdf1ce2296 Mon Sep 17 00:00:00 2001
From: Andrew Waterman
Date: Mon, 31 Aug 2015 10:28:35 -0700
Subject: Refactor Namespace

No need for Option, since an empty Set can be used instead.
---
 src/main/scala/Chisel/Builder.scala | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/main/scala/Chisel/Builder.scala b/src/main/scala/Chisel/Builder.scala
index 5d003633..6598959a 100644
--- a/src/main/scala/Chisel/Builder.scala
+++ b/src/main/scala/Chisel/Builder.scala
@@ -2,10 +2,9 @@ package Chisel
 import scala.util.DynamicVariable
 import scala.collection.mutable.{ArrayBuffer, HashMap}
 
-private class Namespace(parent: Option[Namespace], kws: Option[Set[String]]) {
+private class Namespace(parent: Option[Namespace], keywords: Set[String]) {
   private var i = 0L
   private val names = collection.mutable.HashSet[String]()
-  private val keywords = kws.getOrElse(Set())
 
   private def rename(n: String) = { i += 1; s"${n}_${i}" }
 
@@ -20,11 +19,11 @@ private class Namespace(parent: Option[Namespace], kws: Option[Set[String]]) {
     res
   }
 
-  def child(kws: Option[Set[String]]): Namespace = new Namespace(Some(this), kws)
-  def child: Namespace = new Namespace(Some(this), None)
+  def child(kws: Set[String]): Namespace = new Namespace(Some(this), kws)
+  def child: Namespace = child(Set())
 }
 
-private class FIRRTLNamespace extends Namespace(None, Some(Set("mem", "node", "wire", "reg", "inst")))
+private class FIRRTLNamespace extends Namespace(None, Set("mem", "node", "wire", "reg", "inst"))
 
 private class IdGen {
   private var counter = -1L
-- 
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