unlink the links

include/ifaces/ILink.h

@@ -1,17 +1,16 @@
 #pragma once
 #include <memory>
 #include <vector>
-#include "ifaces/INode.h"
-
-using LinkPtr = std::shared_ptr<ILink>;
+#include "ifaces/ILinkMixin.h"
 
+template <class TElem>
 class ILink {
 public:
 	virtual ~ILink() = default;
-	virtual NodePtr getNode() const = 0;
-	virtual NodePtr getParent() const = 0;
-	virtual void setParent(const NodePtr& parent) = 0;
-	virtual const std::vector<NodePtr>& getChildren() const = 0;
-	virtual void addChild(const NodePtr& child) = 0;
-	virtual void removeChild(const NodePtr& child) = 0;
+	virtual std::shared_ptr<TElem> getNode() const = 0;
+	virtual std::shared_ptr<TElem> getParent() const = 0;
+	virtual void setParent(const std::shared_ptr<TElem>& parent) = 0;
+	virtual const std::vector<std::shared_ptr<TElem>>& getChildren() const = 0;
+	virtual void addChild(const std::shared_ptr<TElem>& child) = 0;
+	virtual void removeChild(const std::shared_ptr<TElem>& child) = 0;
 };

include/ifaces/ILinkMixin.h

@@ -1,11 +1,16 @@
 #pragma once
 #include <memory>
-#include "decls.h"
+#include "ifaces/ILink.h"
+
+class ILinkMixin;
+
+using MixinPtr = std::shared_ptr<ILinkMixin>;
+using LinkPtr = std::shared_ptr<ILink<ILinkMixin>>;
 
 class ILinkMixin {
 public:
 	virtual ~ILinkMixin() = default;
-	virtual void linkChild(const NodePtr& child) = 0;
+	virtual void linkChild(const MixinPtr& child) = 0;
 	virtual void unlinkParent() = 0;
 	virtual LinkPtr getLink() = 0;
 };

include/ifaces/INode.h

@@ -2,6 +2,8 @@
 #include "ifaces/ILinkMixin.h"
 #include <string>
 
+class INode;
+
 using NodePtr = std::shared_ptr<INode>;
 
 class INode : public virtual ILinkMixin {