tmp

.gitignore

@@ -0,0 +1,3 @@
+*.swp
+build
+.vscode

include/ifaces/ILink.h

@@ -10,11 +10,11 @@ using LinkPtr = std::shared_ptr<ILink>;
 
 class ILink {
 public:
-    virtual ~ILink() = default;
+	virtual ~ILink() = default;
-    virtual NodePtr getNode() const = 0;
+	virtual NodePtr getNode() const = 0;
-    virtual LinkPtr getParent() const = 0;
+	virtual NodePtr getParent() const = 0;
-    virtual void setParent(const LinkPtr& parent) = 0;
+	virtual void setParent(const NodePtr& parent) = 0;
-    virtual const std::vector<LinkPtr>& getChildren() const = 0;
+	virtual const std::vector<NodePtr>& getChildren() const = 0;
-    virtual void addChild(const LinkPtr& child) = 0;
+	virtual void addChild(const NodePtr& child) = 0;
-    virtual void removeChild(const LinkPtr& child) = 0;
+	virtual void removeChild(const NodePtr& child) = 0;
 };

include/ifaces/ILinkMixin.h

@@ -9,8 +9,9 @@ using LinkPtr = std::shared_ptr<ILink>;
 
 class ILinkMixin {
 public:
-    virtual ~ILinkMixin() = default;
+	virtual ~ILinkMixin() = default;
-    virtual void linkChild(const NodePtr& child) = 0;
+	virtual void linkChild(const NodePtr& child) = 0;
-    virtual void unlinkParent() = 0;
+	virtual void unlinkParent() = 0;
-    virtual LinkPtr getLink() = 0;
+	virtual LinkPtr getLink() = 0;
+	virtual NodePtr getSelf() = 0;
 };

include/ifaces/INode.h

@@ -5,7 +5,7 @@
 // INode является ILinkMixin, поэтому полный #include здесь оправдан
 class INode : public ILinkMixin {
 public:
-    ~INode() override = default;
+	~INode() override = default;
-    virtual const std::string& name() const = 0;
+	virtual const std::string& name() const = 0;
-    virtual NodePtr getSelf() = 0;
+	virtual NodePtr getSelf() = 0;
 };

include/links/BaseLink.h

@@ -5,20 +5,20 @@
 
 class BaseLink : public ILink {
 public:
-    explicit BaseLink(NodePtr node) : owner_node_(node) {}
+	explicit BaseLink(NodePtr node) : owner_node_(node) {}
-    NodePtr getNode() const override { return owner_node_.lock(); }
+	NodePtr getNode() const override { return owner_node_.lock(); }
-    LinkPtr getParent() const override { return parent_.lock(); }
+	NodePtr getParent() const override { return parent_.lock(); }
-    void setParent(const LinkPtr& parent) override { parent_ = parent; }
+	void setParent(const NodePtr& parent) override { parent_ = parent; }
-    const std::vector<LinkPtr>& getChildren() const override { return children_; }
+	const std::vector<NodePtr>& getChildren() const override { return children_; }
-    void removeChild(const LinkPtr& child) override {
+	void removeChild(const NodePtr& child) override {
-        children_.erase(std::remove(children_.begin(), children_.end(), child), children_.end());
+		children_.erase(std::remove(children_.begin(), children_.end(), child), children_.end());
-    }
+	}
 
-    ~BaseLink() override {
+	~BaseLink() override {
-        std::cout << "--- Destructor called for: " << "BaseLink" << "\n";
+		std::cout << "--- Destructor called for: " << "BaseLink" << "\n";
-    }
+	}
 protected:
-    std::vector<LinkPtr> children_;
+	std::vector<NodePtr> children_;
-    std::weak_ptr<INode> owner_node_;
+	std::weak_ptr<INode> owner_node_;
-    std::weak_ptr<ILink> parent_;
+	std::weak_ptr<INode> parent_;
 };

include/links/LeafLink.h

@@ -4,6 +4,6 @@
 
 class LeafLink : public BaseLink {
 public:
-    using BaseLink::BaseLink;
+	using BaseLink::BaseLink;
-    void addChild(const LinkPtr&) override { throw std::logic_error("LeafLink cannot have children"); }
+	void addChild(const NodePtr&) override { throw std::logic_error("LeafLink cannot have children"); }
 };

include/links/OneToManyLink.h

@@ -3,6 +3,6 @@
 
 class OneToManyLink : public BaseLink {
 public:
-    using BaseLink::BaseLink;
+	using BaseLink::BaseLink;
-    void addChild(const LinkPtr& child) override { children_.push_back(child); }
+	void addChild(const NodePtr& child) override { children_.push_back(child); }
 };

include/mixins/LazyLinkMixin.h

@@ -5,67 +5,50 @@
 #include "links/OneToManyLink.h"
 #include <memory>
 
-template <class TFinalNode>
+template <class TLink>
-class LazyLinkMixin : public INode {
+class LazyLinkMixin : public ILinkMixin {
 public:
-    void linkChild(const NodePtr& childNode) override {
+	void linkChild(const NodePtr& childNode) override {
-        lazyInit();
+		LinkPtr childLink = childNode->getLink();
-        upgradeLinkIfNeeded();
+		childLink->setParent(getSelf());
-        LinkPtr childLink = childNode->getLink();
-        childLink->setParent(link_);
-        link_->addChild(childLink);
-    }
 
-    void unlinkParent() override {
+		getLink()->addChild(childNode);
-        lazyInit();
+	}
-        LinkPtr parentLink = link_->getParent();
-        if (!parentLink) return;
-        parentLink->removeChild(this->getLink());
-        link_->setParent(nullptr);
-    }
 
-    LinkPtr getLink() override {
+	void unlinkParent() override {
-        lazyInit();
+		/* No link -- no parent, who'll unlinked? */
-        return link_;
+		if (!link_)
-    }
+			throw std::logic_error("Link isn't inited!");
 
-    ~LazyLinkMixin() override {
+		NodePtr parent = link_->getParent();
-        std::cout << "--- Destructor called for: " << "LazyLinkMixin" << "\n";
+		if (!parent)
-    }
+			throw std::logic_error("Have no parent!");
+
+		LinkPtr parentLink = parent->getLink();
+
+		parentLink->removeChild(getSelf());
+		getLink()->setParent(nullptr);
+	}
+
+	LinkPtr getLink() override {
+		lazyInit();
+		return link_;
+	}
+
+	~LazyLinkMixin() override {
+		std::cout << "--- Destructor called for: " << "LazyLinkMixin" << "\n";
+	}
 
 protected:
-    virtual std::shared_ptr<TFinalNode> getShared() = 0;
+	virtual NodePtr getShared() = 0;
-    NodePtr getSelf() override { return getShared(); }
+	NodePtr getSelf() override { return getShared(); }
 
 private:
-    void lazyInit() {
+	void lazyInit() {
-        if (!link_) {
+		if (!link_) {
-            link_ = std::make_shared<LeafLink>(getSelf());
+			link_ = std::make_shared<TLink>(getSelf());
-        }
+		}
-    }
+	}
 
-    void upgradeLinkIfNeeded() {
+	LinkPtr link_;
-        if (!std::dynamic_pointer_cast<LeafLink>(link_)) return;
-        auto newLink = std::make_shared<OneToManyLink>(getSelf());
-        if (auto parentLink = link_->getParent()) {
-            parentLink->removeChild(link_);
-            parentLink->addChild(newLink);
-        }
-        newLink->setParent(link_->getParent());
-        link_ = newLink;
-    }
-
-    void downgradeLinkIfPossible() {
-        if (link_->getChildren().empty() && std::dynamic_pointer_cast<OneToManyLink>(link_)) {
-            auto newLink = std::make_shared<LeafLink>(getSelf());
-            if (auto parentLink = link_->getParent()) {
-                parentLink->removeChild(link_);
-                parentLink->addChild(newLink);
-            }
-            newLink->setParent(link_->getParent());
-            link_ = newLink;
-        }
-    }
-
-    LinkPtr link_;
 };

include/nodes/BaseNode.h

@@ -0,0 +1,20 @@
+#pragma once
+#include "mixins/LazyLinkMixin.h"
+#include "ifaces/INode.h"
+#include <iostream>
+
+class BaseNode : public INode,
+		 public LazyLinkMixin<OneToManyLink>,
+		 public std::enable_shared_from_this<BaseNode> {
+public:
+	BaseNode(std::string name) : name_(std::move(name)) {}
+	const std::string& name() const override { return name_; }
+	~BaseNode() {
+		std::cout << "--- Destructor called for: " << name_ << "\n";
+	}
+protected:
+	NodePtr getShared() override {
+		return shared_from_this();
+	}
+	std::string name_;
+};

include/nodes/SimpleNode.h

@@ -1,26 +1,12 @@
 #pragma once
-#include "mixins/LazyLinkMixin.h"
+#include "nodes/BaseNode.h"
 #include <iostream>
 
-class SimpleNode : public LazyLinkMixin<SimpleNode>,
+class SimpleNode :
-                   public std::enable_shared_from_this<SimpleNode> {
+		   public BaseNode {
 public:
-    static NodePtr create(std::string name) {
+	~SimpleNode() {
-        struct EnableMakeShared : public SimpleNode {
+		std::cout << "--- Destructor called for: " << name_ << "\n";
-            EnableMakeShared(std::string n) : SimpleNode(std::move(n)) {}
+	}
-        };
+	SimpleNode(std::string name) : BaseNode(std::move(name)) {}
-        return std::make_shared<EnableMakeShared>(std::move(name));
-    }
-    const std::string& name() const override { return name_; }
-    ~SimpleNode() {
-        std::cout << "--- Destructor called for: " << name_ << "\n";
-    }
-protected:
-    std::shared_ptr<SimpleNode> getShared() override {
-        return shared_from_this();
-    }
-private:
-    friend class LazyLinkMixin<SimpleNode>;
-    explicit SimpleNode(std::string name) : name_(std::move(name)) {}
-    std::string name_;
 };

src/main.cpp

@@ -2,50 +2,50 @@
 #include <iostream>
 
 void printTree(const NodePtr& startNode, int indent = 0) {
-    if (!startNode) return;
+	if (!startNode) return;
-    for (int i = 0; i < indent; ++i) std::cout << "  ";
+	for (int i = 0; i < indent; ++i) std::cout << "  ";
-    std::cout << startNode->name() << "\n";
+	std::cout << startNode->name() << "\n";
-    LinkPtr nodeLink = startNode->getLink();
+	LinkPtr nodeLink = startNode->getLink();
-    for (const auto& childLink : nodeLink->getChildren()) {
+	for (const auto& child : nodeLink->getChildren()) {
-        printTree(childLink->getNode(), indent + 1);
+		printTree(child, indent + 1);
-    }
+	}
 }
 
 int main() {
-    std::cout << "Entering main scope...\n\n";
+	std::cout << "Entering main scope...\n\n";
-
-    // Начало новой области видимости
-    {
-        auto root = SimpleNode::create("Root");
-        auto child2 = SimpleNode::create("Child2");
-
-        root->linkChild(child2);
 
+	// Начало новой области видимости
 	{
-		auto child1 = SimpleNode::create("Child1");
+		auto root = std::make_shared<SimpleNode>("Root");
-		root->linkChild(child1);
+		auto child2 = std::make_shared<SimpleNode>("Child2");
-		auto subchild = SimpleNode::create("SubChild");
-		child1->linkChild(subchild);
-		auto child3 = SimpleNode::create("Child3");
-		root->linkChild(child3);
-		auto subchild2 = SimpleNode::create("SubChild2");
-		child3->linkChild(subchild2);
 
-		std::cout << "Initial tree:\n";
+		root->linkChild(child2);
+
+		{
+			auto child1 = std::make_shared<SimpleNode>("Child1");
+			root->linkChild(child1);
+			auto subchild = std::make_shared<SimpleNode>("SubChild");
+			child1->linkChild(subchild);
+			auto child3 = std::make_shared<SimpleNode>("Child3");
+			root->linkChild(child3);
+			auto subchild2 = std::make_shared<SimpleNode>("SubChild2");
+			child3->linkChild(subchild2);
+
+			std::cout << "Initial tree:\n";
+			printTree(root);
+
+			std::cout << "\nUnlinking Child1...\n";
+			child1->unlinkParent();
+			std::cout << "\nTree after unlink:\n";
+			printTree(root);
+		}
+
+		std::cout << "\nTree after scope out:\n";
 		printTree(root);
 
-		std::cout << "\nUnlinking Child1...\n";
+	} // <--- КОНЕЦ ОБЛАСТИ ВИДИМОСТИ
-		child1->unlinkParent();
-		std::cout << "\nTree after unlink:\n";
-		printTree(root);
-	}
 
-        std::cout << "\nTree after scope out:\n";
+	std::cout << "\nExited main scope. All smart pointers destroyed.\n";
-        printTree(root);
 
-    } // <--- КОНЕЦ ОБЛАСТИ ВИДИМОСТИ
+	return 0;
-
-    std::cout << "\nExited main scope. All smart pointers destroyed.\n";
-
-    return 0;
 }