Extract and reuse nodes creation code

tinyxml2.h

@@ -1819,8 +1819,21 @@ private:
 	static const char* _errorNames[XML_ERROR_COUNT];
 
     void Parse();
+
+    template<class NodeType, int PoolElementSize>
+    NodeType* CreateUnlinkedNode( MemPoolT<PoolElementSize>& pool );
 };
 
+template<class NodeType, int PoolElementSize>
+inline NodeType* XMLDocument::CreateUnlinkedNode( MemPoolT<PoolElementSize>& pool )
+{
+    TIXMLASSERT( sizeof( NodeType ) == PoolElementSize );
+    TIXMLASSERT( sizeof( NodeType ) == pool.ItemSize() );
+    NodeType* returnNode = new (pool.Alloc()) NodeType( this );
+    TIXMLASSERT( returnNode );
+    returnNode->_memPool = &pool;
+    return returnNode;
+}
 
 /**
 	A XMLHandle is a class that wraps a node pointer with null checks; this is