1 files changed, 98 insertions, 0 deletions
diff --git a/lib/antlr/antlr/TokenRefCount.h b/lib/antlr/antlr/TokenRefCount.h
new file mode 100644
index 00000000..6b2042b7
--- /dev/null
+++ b/lib/antlr/antlr/TokenRefCount.h
@@ -0,0 +1,98 @@
+#ifndef INC_TokenRefCount_h__
+# define INC_TokenRefCount_h__
+
+/* ANTLR Translator Generator
+ * Project led by Terence Parr at http://www.jGuru.com
+ * Software rights: http://www.antlr.org/license.html
+ *
+ * $Id:$
+ */
+
+# include <antlr/config.h>
+
+#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
+namespace antlr {
+#endif
+
+class Token;
+
+struct ANTLR_API TokenRef
+{
+	Token* const ptr;
+	unsigned int count;
+
+	TokenRef(Token* p);
+	~TokenRef();
+	TokenRef* increment()
+	{
+		++count;
+		return this;
+	}
+	bool decrement()
+	{
+		return (--count==0);
+	}
+
+	static TokenRef* getRef(const Token* p);
+private:
+	TokenRef( const TokenRef& );
+	TokenRef& operator=( const TokenRef& );
+};
+
+template<class T>
+	class ANTLR_API TokenRefCount
+{
+private:
+	TokenRef* ref;
+
+public:
+	TokenRefCount(const Token* p=0)
+	: ref(p ? TokenRef::getRef(p) : 0)
+	{
+	}
+	TokenRefCount(const TokenRefCount<T>& other)
+	: ref(other.ref ? other.ref->increment() : 0)
+	{
+	}
+	~TokenRefCount()
+	{
+		if (ref && ref->decrement())
+			delete ref;
+	}
+	TokenRefCount<T>& operator=(Token* other)
+	{
+		TokenRef* tmp = TokenRef::getRef(other);
+
+		if (ref && ref->decrement())
+			delete ref;
+
+		ref=tmp;
+
+		return *this;
+	}
+	TokenRefCount<T>& operator=(const TokenRefCount<T>& other)
+	{
+		if( other.ref != ref )
+		{
+			TokenRef* tmp = other.ref ? other.ref->increment() : 0;
+
+			if (ref && ref->decrement())
+				delete ref;
+
+			ref=tmp;
+		}
+		return *this;
+	}
+
+	operator T* ()  const { return ref ? static_cast<T*>(ref->ptr) : 0; }
+	T* operator->() const { return ref ? static_cast<T*>(ref->ptr) : 0; }
+	T* get()        const { return ref ? static_cast<T*>(ref->ptr) : 0; }
+};
+
+typedef TokenRefCount<Token> RefToken;
+
+#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
+}
+#endif
+
+#endif //INC_TokenRefCount_h__