+ filters are cumulative. So &&

Author: andreakarasho

src/Bevy.cs

@@ -398,19 +398,24 @@ public interface IEventParam
 
 internal sealed class EventParam<T> : SystemParam<World>, IEventParam, IIntoSystemParam<World> where T : notnull
 {
-	private readonly List<T> _events = new();
+	private readonly List<T> _eventsLastFrame = new (), _eventsThisFrame = new();
 
 	internal EventParam()
 	{
-		Writer = new EventWriter<T>(_events);
-		Reader = new EventReader<T>(_events);
+		Writer = new EventWriter<T>(_eventsThisFrame);
+		Reader = new EventReader<T>(_eventsLastFrame);
 	}
 
 	public EventWriter<T> Writer { get; }
 	public EventReader<T> Reader { get; }
 
 
-	public void Clear() => _events.Clear();
+	public void Clear()
+	{
+		_eventsLastFrame.Clear();
+		_eventsLastFrame.AddRange(_eventsThisFrame);
+		_eventsThisFrame.Clear();
+	}
 
 	public static ISystemParam<World> Generate(World arg)
 	{
@@ -779,7 +784,7 @@ internal Commands(World world)
 		_world = world;
 	}
 
-	public EntityCommand Entity(EcsID id)
+	public EntityCommand Entity(EcsID id = 0)
 	{
 		var ent = _world.Entity(id);
 		return new EntityCommand(_world, ent.ID);

src/World.cs

@@ -322,7 +322,6 @@ internal ref T GetUntrusted<T>(EcsID entity, EcsID id, int size) where T : struc
 		if (IsDeferred && !Has(entity, id))
 		{
 			Unsafe.SkipInit<T>(out var val);
-			var isManaged = RuntimeHelpers.IsReferenceOrContainsReferences<T>();
 			return ref Unsafe.Unbox<T>(SetDeferred(entity, id, val, size)!);
 		}
 

tools/TinyEcs.Generator/Program.cs

@@ -219,7 +219,7 @@ static string CreateDataAndFilterStructsContent()
 				var createSubIterators = GenerateSequence(i + 1, "\n", j => $"_iter{j} = T{j}.CreateIterator(iterator);");
 
 				var callSubIterators = GenerateSequence(i + 1, "\n", j => $"var i{j} = _iter{j}.MoveNext();");
-				var callResultsSubIterators = GenerateSequence(i + 1, " | ", j => $"i{j} ");
+				var callResultsSubIterators = GenerateSequence(i + 1, " && ", j => $"i{j}");
 				var setTicksSubIterators = GenerateSequence(i + 1, "\n", j => $"_iter{j}.SetTicks(lastRun, thisRun);");
 
 				sb.AppendLine($@"