From 9459f53ffa8eea5692d31152a71661571e8a4b96 Mon Sep 17 00:00:00 2001
From: Dustin Howett <duhowett@microsoft.com>
Date: Fri, 2 Mar 2018 17:49:51 -0800
Subject: [PATCH] Add a class inheritance helper

---
 class.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/class.h b/class.h
index 8da94eb..e90db48 100644
--- a/class.h
+++ b/class.h
@@ -303,4 +303,15 @@ static inline Class classForObject(id obj)
 	return obj->isa;
 }
 
+static inline BOOL classIsOrInherits(Class cls, Class base)
+{
+	for (Class c = cls ;
+		Nil != c ;
+		c = c->super_class)
+	{
+		if (c == base) { return YES; }
+	}
+	return NO;
+}
+
 #endif //__OBJC_CLASS_H_INCLUDED