From 8ecae793aa79056a312d3c8518106cfeca42390e Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Fri, 26 Apr 2019 12:57:56 -0700
Subject: [PATCH] [meta] Add hb_is_cr_convertible_to()

---
 src/hb-meta.hh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/hb-meta.hh b/src/hb-meta.hh
index 73f965f86..005420364 100644
--- a/src/hb-meta.hh
+++ b/src/hb-meta.hh
@@ -98,6 +98,11 @@ template <typename T> using hb_remove_pointer = typename hb_match_pointer<T>::ty
 
 template <typename T> using hb_decay = hb_remove_const<hb_remove_reference<T>>;
 
+#define hb_is_cr_convertible_to(A, B) ( \
+	hb_is_same (hb_decay<A>, hb_decay<B>) && \
+	hb_is_const (A) <= hb_is_const (B) && \
+	hb_is_reference (A) >= hb_is_reference (B))
+
 
 /* std::move and std::forward */