From 27b2093009745b6c30663605f45ac95deb1562cc Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Wed, 8 May 2019 15:32:57 -0700
Subject: [PATCH] [map] Return rvalues from keys()/values()

---
 src/hb-algs.hh | 7 +++++++
 src/hb-map.hh  | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/src/hb-algs.hh b/src/hb-algs.hh
index d377772..0db2184 100644
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -43,6 +43,13 @@ HB_FUNCOBJ (hb_identity);
 
 struct
 {
+  template <typename T> hb_remove_reference<T>
+  operator () (T&& v) const { return v; }
+}
+HB_FUNCOBJ (hb_rvalue);
+
+struct
+{
   template <typename T> bool
   operator () (T&& v) const { return bool (hb_forward<T> (v)); }
 }
diff --git a/src/hb-map.hh b/src/hb-map.hh
index 6eac8c3..2f06595 100644
--- a/src/hb-map.hh
+++ b/src/hb-map.hh
@@ -221,12 +221,14 @@ struct hb_hashmap_t
     + hb_array (items, mask ? mask + 1 : 0)
     | hb_filter (&item_t::is_real)
     | hb_map (&item_t::key)
+    | hb_map (hb_rvalue)
   )
   auto values () const HB_AUTO_RETURN
   (
     + hb_array (items, mask ? mask + 1 : 0)
     | hb_filter (&item_t::is_real)
     | hb_map (&item_t::value)
+    | hb_map (hb_rvalue)
   )
 
   protected:
-- 
2.7.4