From 1d35ed2abbb18a372694af6b3bd66854b19d6397 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Mon, 29 May 2023 16:38:16 +0300
Subject: [PATCH] Add type-save any-type container

---
 libs/util/include/psemek/util/any_set.hpp | 83 +++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 libs/util/include/psemek/util/any_set.hpp

diff --git a/libs/util/include/psemek/util/any_set.hpp b/libs/util/include/psemek/util/any_set.hpp
new file mode 100644
index 00000000..5ffef7ab
--- /dev/null
+++ b/libs/util/include/psemek/util/any_set.hpp
@@ -0,0 +1,83 @@
+#pragma once
+
+#include <typeindex>
+#include <any>
+#include <unordered_map>
+
+namespace psemek::util
+{
+
+	struct any_set
+	{
+		template <typename T, typename ... Args>
+		T & emplace(Args && ... args);
+
+		template <typename T>
+		T const & get() const;
+
+		template <typename T>
+		T & get();
+
+		template <typename T>
+		T const * get_if() const;
+
+		template <typename T>
+		T * get_if();
+
+		template <typename T>
+		bool contains() const;
+
+		template <typename T>
+		void remove();
+
+	private:
+		std::unordered_map<std::type_index, std::any> storage_;
+	};
+
+	template <typename T, typename ... Args>
+	T & any_set::emplace(Args && ... args)
+	{
+		return std::any_cast<T &>(storage_[typeid(T)] = T(std::forward<Args>(args)...));
+	}
+
+	template <typename T>
+	T const & any_set::get() const
+	{
+		return std::any_cast<T const &>(storage_.at(typeid(T)));
+	}
+
+	template <typename T>
+	T & any_set::get()
+	{
+		return std::any_cast<T &>(storage_.at(typeid(T)));
+	}
+
+	template <typename T>
+	T const * any_set::get_if() const
+	{
+		if (auto it = storage_.find(typeid(T)); it != storage_.end())
+			return std::addressof(std::any_cast<T const &>(it->second));
+		return nullptr;
+	}
+
+	template <typename T>
+	T * any_set::get_if()
+	{
+		if (auto it = storage_.find(typeid(T)); it != storage_.end())
+			return std::addressof(std::any_cast<T &>(it->second));
+		return nullptr;
+	}
+
+	template <typename T>
+	bool any_set::contains() const
+	{
+		return storage_.contains(typeid(T));
+	}
+
+	template <typename T>
+	void any_set::remove()
+	{
+		storage_.erase(typeid(T));
+	}
+
+}