made T of ISystem contravariant

Doraku · Jun 24, 2019 · 8cd9414 · 8cd9414
1 parent 7ba16de
commit 8cd9414
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Showing 2 changed files with 2 additions and 1 deletion.
diff --git a/source/DefaultEcs/DefaultEcs.Package.csproj b/source/DefaultEcs/DefaultEcs.Package.csproj
@@ -30,6 +30,7 @@ added EntityDisposed event on World
 added WhenAdded, WhenChanged and WhenRemoved filter on EntitySetBuilder to create reactive EntitySet
 added WhenAddedAttribute, WhenChangedAttribute and WhenRemovedAttribute for automatique AEntitySystem EntitySet creation from a World
 added Complete method on EntitySet to clear its content if created with a reactive filter
+made T of ISystem contravariant
 
 breaking changes
 removed IEntitySetObserver and implementation, use EntityAdded and EntityRemoved events on EntitySet instead

diff --git a/source/DefaultEcs/System/ISystem.cs b/source/DefaultEcs/System/ISystem.cs
@@ -6,7 +6,7 @@ namespace DefaultEcs.System
     /// Exposes a method to update a system.
     /// </summary>
     /// <typeparam name="T">The type of the object used as state to update the system.</typeparam>
-    public interface ISystem<T> : IDisposable
+    public interface ISystem<in T> : IDisposable
     {
         /// <summary>
         /// Gets or sets whether the current <see cref="ISystem{T}"/> instance should update or not.