-added absen components list to system

-added ECS uda attributes
-added InputStruct version switch (gets update() input as structure of arrays)
-initial (WIP) EntitiesData update() input structure compile time parsing

tests/tests.d

@@ -4,6 +4,7 @@ import ecs.entity;
 import ecs.events;
 import ecs.manager;
 import ecs.system;
+import ecs.attributes;
 
 import core.time;
 import std.stdio;
@@ -124,11 +125,12 @@ int main()
 
 		}
 
-		struct InputData
+		static struct EntitiesData
 		{
 			TestComp* test;
 			TestComp2* test2;
-			@("optional") TestComp3* test3;
+			@optional TestComp3* test3;
+			@absen TestComp4* test4;
 		}
 
 		void update(ref Entity entity, ref TestComp test, ref TestComp2 test2)//, TestComp3* test3) //ref TestComp comp)
@@ -153,6 +155,11 @@ int main()
 				
 		}
 
+		void update(ref EntitiesData data)
+		{
+
+		}
+
 		void handleEvent(TestEvent event, ref TestComp test, ref TestComp2 test2, TestComp3* test3)
 		{
 
@@ -163,6 +170,11 @@ int main()
 	{
 		__gshared ushort system_id;
 
+		static struct EntitiesData
+		{
+			TestComp* test;
+		}
+
 		void initialize(ref Entity entity, ref TestComp comp)
 		{
 
@@ -175,6 +187,13 @@ int main()
 			//writeln("High priority tekst! ");
 		}
 
+		void update(ref EntitiesData data) //ref TestComp comp)
+		{
+			assert(cast(size_t)&data.test % TestComp.alignof == 0);
+
+			//writeln("High priority tekst! ");
+		}
+
 		/*void handleEvent(Event event, ref TestComp comp)
 		{
 
@@ -185,6 +204,17 @@ int main()
 	{
 		__gshared ushort system_id;
 
+		static struct EntitiesData
+		{
+			Entity* entity;
+			TestComp3* test;
+
+			/*void a()
+			{
+				
+			}*/
+		}
+
 		void onEnable()
 		{
 			import std.stdio;
@@ -211,6 +241,13 @@ int main()
 			gEM.sendSelfEvent!(TestEvent)(entity.id, TestEvent());
 		}
 
+		void update(ref EntitiesData data) //ref TestComp comp)
+		{
+			//writeln("TestSystem2 update");
+			data.test.gg += 14;
+			gEM.sendSelfEvent!(TestEvent)(data.entity.id, TestEvent());
+		}
+
 		/*void handleEvent(Event event, ref TestComp comp)
 		{