From 2778df7972f537192b51cd0719adf2ab4d1f3397 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Wed, 3 Apr 2019 14:15:01 -0700
Subject: [PATCH] [meta] Add hb_is_same()

---
 src/hb-meta.hh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/hb-meta.hh b/src/hb-meta.hh
index 63c8a8cf5..c0095637e 100644
--- a/src/hb-meta.hh
+++ b/src/hb-meta.hh
@@ -92,15 +92,18 @@ template <bool b> struct hb_bool_tt { enum { value = b }; };
 typedef hb_bool_tt<true> hb_true_t;
 typedef hb_bool_tt<false> hb_false_t;
 
-
 template<bool B, typename T = void>
 struct hb_enable_if {};
-
 template<typename T>
 struct hb_enable_if<true, T> { typedef T type; };
-
 #define hb_enable_if(Cond) typename hb_enable_if<(Cond)>::type* = nullptr
 
+template <typename T, typename T2>
+struct hb_is_same : hb_false_t {};
+template <typename T>
+struct hb_is_same<T, T> : hb_true_t {};
+#define hb_is_same(T, T2) hb_is_same<T, T2>::value
+
 
 /*
  * Meta-functions.