added session class

include/matador/object/basic_object_info.hpp

@@ -1,6 +1,7 @@
 #ifndef BASIC_PROTOTYPE_INFO_HPP
 #define BASIC_PROTOTYPE_INFO_HPP
 
+#include <string>
 #include <typeindex>
 
 namespace matador::object {
@@ -12,6 +13,7 @@ public:
   virtual ~basic_object_info() = default;
 
   [[nodiscard]] std::type_index type_index() const;
+  [[nodiscard]] std::string name() const;
 
 protected:
   basic_object_info(schema_node &node, std::type_index type_index);
@@ -27,8 +29,15 @@ public:
   explicit object_info(schema_node &node)
   : basic_object_info(node, typeid(Type)) {}
 
+  const Type &prototype() const { return prototype_; }
+
+private:
+  Type prototype_;
 };
 
+template<typename Type>
+using object_info_ref = std::reference_wrapper<const object_info<Type>>;
+
 namespace detail {
 struct null_type {};
 }

include/matador/object/schema.hpp

@@ -83,6 +83,16 @@ public:
    */
   [[nodiscard]] std::string name() const;
 
+  template <typename Type>
+  [[nodiscard]] utils::result<object_info_ref<Type>, utils::error> info() const {
+      auto result = find_node(std::type_index(typeid(Type)));
+      if (!result) {
+          return utils::failure(result.err());
+      }
+
+      return utils::ok(result.value()->info<Type>());
+  }
+
 private:
   using node_ptr = std::shared_ptr<schema_node>;
   using t_node_map = std::unordered_map<std::string, node_ptr>;

include/matador/object/schema_node.hpp

@@ -46,6 +46,11 @@ public:
   [[nodiscard]] node_ptr next() const;
   [[nodiscard]] node_ptr prev() const;
 
+  template <typename Type>
+  object_info_ref<Type> info() const {
+      return std::ref(static_cast<const object_info<Type>&>(*info_));
+  }
+
 private:
   explicit schema_node(schema& tree);
   template < typename Type >