oxedyne/fe2o3 — fe2o3_text/tests/detect_corpus/cpp/smart

1.6 KiB, 1 run

created by r1870400018:11952, which is this file's identity for as long as the history lasts, whatever it is later renamed to

1	#include <memory>
2	#include <string>
3	#include <vector>
4	#include <iostream>
5
6	class Node {
7	public:
8	explicit Node(std::string name)
9	: name_(std::move(name)) {}
10
11	void add_child(std::unique_ptr<Node> child) {
12	child->parent_ = this;
13	children_.push_back(std::move(child));
14	}
15
16	const std::string& name() const noexcept { return name_; }
17
18	void print(int depth = 0) const {
19	for (int i = 0; i < depth; ++i) std::cout << " ";
20	std::cout << name_ << "\n";
21	for (const auto& child : children_) {
22	child->print(depth + 1);
23	}
24	}
25
26	private:
27	std::string name_;
28	Node* parent_ = nullptr;
29	std::vector<std::unique_ptr<Node>> children_;
30	};
31
32	class Registry {
33	public:
34	std::shared_ptr<Node> get_or_create(const std::string& name) {
35	for (const auto& node : nodes_) {
36	if (node->name() == name) {
37	return node;
38	}
39	}
40	auto node = std::make_shared<Node>(name);
41	nodes_.push_back(node);
42	return node;
43	}
44
45	size_t size() const noexcept { return nodes_.size(); }
46
47	private:
48	std::vector<std::shared_ptr<Node>> nodes_;
49	};
50
51	int main() {
52	auto root = std::make_unique<Node>("root");
53	root->add_child(std::make_unique<Node>("child1"));
54	root->add_child(std::make_unique<Node>("child2"));
55	root->print();
56
57	Registry reg;
58	auto a = reg.get_or_create("alpha");
59	auto b = reg.get_or_create("beta");
60	auto a2 = reg.get_or_create("alpha");
61	std::cout << "registry size: " << reg.size() << "\n";
62	std::cout << "same? " << (a.get() == a2.get() ? "yes" : "no") << "\n";
63
64	return 0;
65	}