stuff...

include/util/id_type.hpp

@@ -1,25 +1,31 @@
 #pragma once
 
+#include <atomic>
+
 namespace ztu
 {
-template<class Parent, typename IndexType, int uuid = 0>
-class id_type_for
+
+template<typename Index, int ID>
+class id_type
 {
-	friend Parent;
+	explicit constexpr id_type(Index index) : index{ index } {}
 
-	using index_type = IndexType;
+	static constexpr id_type next()
+	{
+		static std::atomic<Index> next_index{ 1 };
+		return id_type{ next_index.fetch_add(1, std::memory_order_seq_cst) };
+	}
 
-	explicit constexpr id_type_for(index_type index) : index{ index } {}
-
-	index_type index{};
+	Index index{};
 
 public:
-	constexpr id_type_for() = default;
-	constexpr auto operator<=>(const id_type_for&) const = default;
+	constexpr id_type() = default;
+	constexpr auto operator<=>(const id_type&) const = default;
 
 	constexpr operator bool() const
 	{
-		return index == index_type{};
+		return index == Index{};
 	}
 };
+
 }