From e769e5a26f6bd3f87962ad084776c01316ad6fbf Mon Sep 17 00:00:00 2001
From: Andrew Waterman
Date: Fri, 24 Mar 2017 15:09:07 -0700
Subject: Fix getWidth on empty Vecs; add test

Use fold(0) instead of reduce to handle the corner case.
---
 src/test/scala/chiselTests/Vec.scala | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/test')

diff --git a/src/test/scala/chiselTests/Vec.scala b/src/test/scala/chiselTests/Vec.scala
index d7c2c648..80c4040d 100644
--- a/src/test/scala/chiselTests/Vec.scala
+++ b/src/test/scala/chiselTests/Vec.scala
@@ -134,6 +134,11 @@ class OneBitUnitRegVecTester extends BasicTester {
   stop()
 }
 
+class ZeroEntryVecTester extends BasicTester {
+  require(Vec(0, Bool()).getWidth == 0)
+  stop()
+}
+
 class VecSpec extends ChiselPropSpec {
   // Disable shrinking on error.
   implicit val noShrinkListVal = Shrink[List[Int]](_ => Stream.empty)
@@ -187,4 +192,8 @@ class VecSpec extends ChiselPropSpec {
   property("A Reg of a Vec of a single 1 bit element should compile and work") {
     assertTesterPasses{ new OneBitUnitRegVecTester }
   }
+
+  property("A Vec with zero entries should compile and have zero width") {
+    assertTesterPasses{ new ZeroEntryVecTester }
+  }
 }
-- 
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