From c6368e014dbfaef1515507b41414a99f998d8616 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 1 Jun 2023 20:51:17 -0600
Subject: [PATCH] [map] Return const reference from operator()

Like we do in operator[].
---
 src/hb-map.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-map.hh b/src/hb-map.hh
index 5debdaccd..bc751aca7 100644
--- a/src/hb-map.hh
+++ b/src/hb-map.hh
@@ -312,7 +312,7 @@ struct hb_hashmap_t
     return nullptr;
   }
   /* Projection. */
-  V operator () (K k) const { return get (k); }
+  const V& operator () (K k) const { return get (k); }
 
   unsigned size () const { return mask ? mask + 1 : 0; }