Add util::resource_container - a simple name+id-based container

libs/util/include/psemek/util/resource_container.hpp

@@ -0,0 +1,88 @@
+#pragma once
+
+#include <psemek/util/hash.hpp>
+
+#include <vector>
+#include <string>
+#include <string_view>
+#include <cstdint>
+#include <unordered_map>
+#include <optional>
+
+namespace psemek::util
+{
+
+	template <typename T, typename Index = std::uint32_t>
+	struct resource_container
+	{
+		using object_id = Index;
+		using iterator = T *;
+		using const_iterator = T const *;
+
+		struct object
+		{
+			std::string const name;
+			T value;
+
+			object(std::string name, T value)
+				: name(std::move(name))
+				, value(std::move(value))
+			{}
+		};
+
+		object & operator[] (Index id)
+		{
+			return objects_[id];
+		}
+
+		object const & operator[] (Index id) const
+		{
+			return objects_[id];
+		}
+
+		Index add(std::string name, T value)
+		{
+			Index id = objects_.size();
+			name_map_[name] = id;
+			objects_.emplace_back(std::move(name), std::move(value));
+			return id;
+		}
+
+		std::optional<object_id> find(std::string_view const & name) const
+		{
+			if (auto it = name_map_.find(name); it != name_map_.end())
+				return it->second;
+			return std::nullopt;
+		}
+
+		std::size_t size() const
+		{
+			return objects_.size();
+		}
+
+		T * begin()
+		{
+			return objects_.data();
+		}
+
+		T * end()
+		{
+			return begin() + size();
+		}
+
+		T const * begin() const
+		{
+			return objects_.data();
+		}
+
+		T const * end() const
+		{
+			return begin() + size();
+		}
+
+	private:
+		std::vector<object> objects_;
+		std::unordered_map<std::string, Index, any_hash, std::equal_to<>> name_map_;
+	};
+
+}