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diff --git a/depends/libnbtplusplus/include/nbt_visitor.h b/depends/libnbtplusplus/include/nbt_visitor.h
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+++ b/depends/libnbtplusplus/include/nbt_visitor.h
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+/*
+ * libnbt++ - A library for the Minecraft Named Binary Tag format.
+ * Copyright (C) 2013, 2015  ljfa-ag
+ *
+ * This file is part of libnbt++.
+ *
+ * libnbt++ is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * libnbt++ is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with libnbt++.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef NBT_VISITOR_H_INCLUDED
+#define NBT_VISITOR_H_INCLUDED
+
+#include "tagfwd.h"
+
+#include "nbt++_export.h"
+
+namespace nbt
+{
+
+/**
+ * @brief Base class for visitors of tags
+ *
+ * Implementing the Visitor pattern
+ */
+class NBT___EXPORT nbt_visitor
+{
+public:
+    virtual ~nbt_visitor() noexcept = 0; //Abstract class
+
+    virtual void visit(tag_byte&) {}
+    virtual void visit(tag_short&) {}
+    virtual void visit(tag_int&) {}
+    virtual void visit(tag_long&) {}
+    virtual void visit(tag_float&) {}
+    virtual void visit(tag_double&) {}
+    virtual void visit(tag_byte_array&) {}
+    virtual void visit(tag_string&) {}
+    virtual void visit(tag_list&) {}
+    virtual void visit(tag_compound&) {}
+    virtual void visit(tag_int_array&) {}
+};
+
+/**
+ * @brief Base class for visitors of constant tags
+ *
+ * Implementing the Visitor pattern
+ */
+class NBT___EXPORT const_nbt_visitor
+{
+public:
+    virtual ~const_nbt_visitor() noexcept = 0; //Abstract class
+
+    virtual void visit(const tag_byte&) {}
+    virtual void visit(const tag_short&) {}
+    virtual void visit(const tag_int&) {}
+    virtual void visit(const tag_long&) {}
+    virtual void visit(const tag_float&) {}
+    virtual void visit(const tag_double&) {}
+    virtual void visit(const tag_byte_array&) {}
+    virtual void visit(const tag_string&) {}
+    virtual void visit(const tag_list&) {}
+    virtual void visit(const tag_compound&) {}
+    virtual void visit(const tag_int_array&) {}
+};
+
+inline nbt_visitor::~nbt_visitor() noexcept {}
+
+inline const_nbt_visitor::~const_nbt_visitor() noexcept {}
+
+}
+
+#endif // NBT_VISITOR_H_INCLUDED