type-safe entity classes

include/fggl/ecs/types.hpp

+/*
+ * This file is part of FGGL.
+ *
+ * FGGL is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * FGGL is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with FGGL.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+//
+// Created by webpigeon on 22/06/22.
+//
+
+#ifndef FGGL_ECS_TYPES_HPP
+#define FGGL_ECS_TYPES_HPP
+
+#include <cstdint>
+
+namespace fggl::ecs {
+
+	struct entity {
+		std::uint32_t id;
+	};
+	constexpr const entity NULL_ENTITY = {0};
+	constexpr const entity MAX_ENTITY = {0xFFFFFFFF};
+
+	struct componentID {
+		std::uint32_t id;
+	};
+	constexpr const entity NULL_COMPONENT = {0};
+
+}
+
+#endif //FGGL_ECS_TYPES_HPP

include/fggl/ecs/utility.hpp

@@ -37,7 +37,7 @@ namespace fggl::ecs {
 			}
 	};
 
-	template<class T> IDType TypeIdGenerator<T>::m_count = 0;
+	template<class T> IDType TypeIdGenerator<T>::m_count = 1;
 }
 
 #endif