From a728c63a98281fd4a0661e17fc01171bc3205b27 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 20 Dec 2018 23:15:49 -0500
Subject: [PATCH] [vector] Add operator bool

---
 src/hb-vector.hh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/hb-vector.hh b/src/hb-vector.hh
index 0d98bd0..b4175c5 100644
--- a/src/hb-vector.hh
+++ b/src/hb-vector.hh
@@ -89,6 +89,8 @@ struct hb_vector_t
     return arrayZ()[i];
   }
 
+  explicit_operator bool () const { return len; }
+
   hb_array_t<Type> as_array ()
   { return hb_array (arrayZ(), len); }
   hb_array_t<const Type> as_array () const
-- 
2.7.4