From f7fcc476418099e2b89c52068ac81280a95bf76f Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Wed, 9 Jan 2019 11:00:32 -0800
Subject: [PATCH] [iter] Make hb_zip() take const references

---
 src/hb-iter.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-iter.hh b/src/hb-iter.hh
index 72dec06d9..de195c5c3 100644
--- a/src/hb-iter.hh
+++ b/src/hb-iter.hh
@@ -232,7 +232,7 @@ struct hb_zip_iter_t :
 template <typename A, typename B,
 	  hb_enable_if (hb_is_iterable (A) && hb_is_iterable (B))>
 inline hb_zip_iter_t<typename A::iter_t, typename B::iter_t>
-hb_zip (A& a, B &b)
+hb_zip (const A& a, const B &b)
 { return hb_zip_iter_t<typename A::iter_t, typename B::iter_t> (a.iter (), b.iter ()); }