From 015b1ee8079175cace17917d375d24175311b2f8 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Mon, 9 Apr 2007 22:17:25 +0000
Subject: The SPtr is castable now.  just say SPtrCast<TypeToCastTo>( ASPtr );

---
 src/sptr.h         | 15 +++++++++++++++
 src/tests/sptr.cpp |  5 +++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/sptr.h b/src/sptr.h
index 23c21dc..0ea8bca 100644
--- a/src/sptr.h
+++ b/src/sptr.h
@@ -4,9 +4,14 @@
 #include <stdint.h>
 #include <stdio.h>
 
+template<typename T> class SPtr;
+template< typename Tb, typename Ta > SPtr<Tb> SPtrCast( SPtr<Ta> src );
+
 template<typename T>
 class SPtr
 {
+	template<typename Tb, typename Ta>
+	friend SPtr<Tb> SPtrCast( SPtr<Ta> pt );
 public:
 	SPtr() :
 		pRefCnt( NULL ),
@@ -96,4 +101,14 @@ private:
 	T *pData;
 };
 
+template< typename Tb, typename Ta > SPtr<Tb> SPtrCast( SPtr<Ta> src )
+{
+	SPtr<Tb> ret;
+	ret.pRefCnt = src.pRefCnt;
+	ret.pData = dynamic_cast<Tb *>(src.pData);
+	if( ret.pRefCnt )
+		(*(ret.pRefCnt)) += 1;
+	return ret;
+}
+
 #endif
diff --git a/src/tests/sptr.cpp b/src/tests/sptr.cpp
index bc00f78..252463b 100644
--- a/src/tests/sptr.cpp
+++ b/src/tests/sptr.cpp
@@ -65,11 +65,12 @@ int main()
 			beAnnoying( pt3 );
 
 			{
-				SPtr<Annoy2> pt4( dynamic_cast<SPtr<Annoy2> >(pt3) );
+				SPtr<Annoy2> pt4( SPtrCast<Annoy2>( pt3 ) );
 				printf("Count: %d\n", pt4.count() );
 
-				pt4.go2();
+				pt4->go2();
 			}
+			printf("Count: %d\n", pt.count() );
 		}
 		printf("Count: %d\n", pt.count() );
 	}
-- 
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