Reworking drawable components

lib/wal/sources/Entity/Entity.hpp

@@ -10,6 +10,7 @@
 #include <memory>
 #include "Component/Component.hpp"
 #include "Exception/WalError.hpp"
+#include "Models/TypeHolder.hpp"
 
 namespace WAL
 {
@@ -83,6 +84,18 @@ namespace WAL
 			return *this;
 		}
 
+		//! @brief Add a component to this entity. The component is constructed in place.
+		//! @throw DuplicateError is thrown if a component with the same type already exist.
+		//! @return This entity is returned
+		template<typename T, typename TNested, typename ...Types>
+		Entity &addComponent(Types &&...params)
+		{
+			if (this->hasComponent<T>())
+				throw DuplicateError("A component of the type \"" + std::string(typeid(T).name()) + "\" already exists.");
+			this->_components.push_back(std::make_unique<T>(*this, TypeHolder<TNested>(), std::forward<Types>(params)...));
+			return *this;
+		}
+
 		//! @brief Copy a component to this entity.
 		//! @return This entity is returned.
 		Entity &addComponent(const Component &component);

lib/wal/sources/Models/TypeHolder.hpp

@@ -0,0 +1,13 @@
+//
+// Created by Zoe Roux on 2021-06-02.
+//
+
+
+#pragma once
+
+namespace WAL
+{
+	//! @brief A class only used to specify template arguments.
+	template<typename T>
+	class TypeHolder {};
+}