From c0513349d005443348ab685053d8560ef78d3a51 Mon Sep 17 00:00:00 2001
From: Cameron McCormack <cam@mcc.id.au>
Date: Tue, 20 Oct 2015 10:16:20 +1100
Subject: [PATCH] Bug 1216040 - Make ArrayLength support
 mozilla::EnumeratedArray. r=froydnj

---
 mfbt/ArrayUtils.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/mfbt/ArrayUtils.h b/mfbt/ArrayUtils.h
index 9566a3f40a8..b572272dd1c 100644
--- a/mfbt/ArrayUtils.h
+++ b/mfbt/ArrayUtils.h
@@ -20,6 +20,7 @@
 
 #include "mozilla/Alignment.h"
 #include "mozilla/Array.h"
+#include "mozilla/EnumeratedArray.h"
 #include "mozilla/TypeTraits.h"
 
 namespace mozilla {
@@ -64,6 +65,13 @@ ArrayLength(const Array<T, N>& aArr)
   return N;
 }
 
+template<typename E, E N, typename T>
+MOZ_CONSTEXPR size_t
+ArrayLength(const EnumeratedArray<E, N, T>& aArr)
+{
+  return size_t(N);
+}
+
 /*
  * Compute the address one past the last element of a constant-length array.
  *