Merged r444:449 from the node refactoring branch to the trunk

src/nodeownership.h

@@ -0,0 +1,39 @@
+#ifndef NODE_OWNERSHIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define NODE_OWNERSHIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
+
+#include "yaml-cpp/noncopyable.h"
+#include "ptr_vector.h"
+#include <set>
+
+namespace YAML
+{
+	class Node;
+	
+	class NodeOwnership: private noncopyable
+	{
+	public:
+		explicit NodeOwnership(NodeOwnership *pOwner = 0);
+		~NodeOwnership();
+		
+		Node& Create() { return m_pOwner->_Create(); }
+		void MarkAsAliased(const Node& node) { m_pOwner->_MarkAsAliased(node); }
+		bool IsAliased(const Node& node) const { return m_pOwner->_IsAliased(node); }
+		
+	private:
+		Node& _Create();
+		void _MarkAsAliased(const Node& node);
+		bool _IsAliased(const Node& node) const;
+		
+	private:
+		ptr_vector<Node> m_nodes;
+		std::set<const Node *> m_aliasedNodes;
+		NodeOwnership *m_pOwner;
+	};
+}
+
+#endif // NODE_OWNERSHIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66