From 3e00139a873016be15c0912b41136d586c5ecd77 Mon Sep 17 00:00:00 2001
From: aothms <t.krijnen@gmail.com>
Date: Mon, 5 Oct 2015 13:07:40 +0200
Subject: [PATCH] Add const pointer cast to IfcBaseClass

---
 src/ifcparse/IfcUtil.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/ifcparse/IfcUtil.h b/src/ifcparse/IfcUtil.h
index e57f5da279..3c10cd51b2 100644
--- a/src/ifcparse/IfcUtil.h
+++ b/src/ifcparse/IfcUtil.h
@@ -89,6 +89,13 @@ namespace IfcUtil {
 				? static_cast<T*>(this) 
 				: static_cast<T*>(0);
 		}
+
+		template <class T>
+		const T* as() const {
+			return is(T::Class()) 
+				? static_cast<const T*>(this) 
+				: static_cast<const T*>(0);
+		}
 	};
 
 	class IfcBaseEntity : public IfcBaseClass {