call struct constructor in EntityUtils.EntityUtils.AddEntityComponent()

Author: friflo

src/ECS/Base/Types/ComponentType.cs

@@ -98,7 +98,7 @@ internal override bool RemoveEntityComponent(Entity entity) {
     }
 
     internal override bool AddEntityComponent(Entity entity) {
-        return entity.AddComponent<T>(default);
+        return entity.AddComponent(new T());
     }
 
     internal override bool AddEntityComponentValue(Entity entity, object value) {

src/Tests-internal/ECS/Test_Entity.cs

@@ -268,6 +268,23 @@ public static void Test_Entity_GetEntityByRawEntity()
         });
         AreEqual("id: 128. expect in [0, current max id: 127]", e!.Message);
     }
+
+    private struct StructWithConstructor : IComponent {
+        public int value = 123;
+        public StructWithConstructor() { } // requires C# 10
+    }
+    
+    [Test]
+    public static void Test_Entity_AddEntityComponent()
+    {
+        var store           = new EntityStore();
+        var entity          = store.CreateEntity();
+        var schema          = EntityStore.GetEntitySchema();
+        var componentType   = schema.ComponentTypeByType[typeof(StructWithConstructor)];
+        EntityUtils.AddEntityComponent(entity, componentType);
+        var component = entity.GetComponent<StructWithConstructor>();
+        AreEqual(123, component.value);
+    }
 }
 
 internal struct MyTag : ITag { }

src/Tests-internal/Tests-internal.csproj

@@ -11,7 +11,7 @@
         <!-- packaging -->
         <PublishRepositoryUrl>false</PublishRepositoryUrl>
         <IsPackable>false</IsPackable>
-        <LangVersion>9</LangVersion>
+        <LangVersion>10</LangVersion>
         <!-- packaging: end -->
     </PropertyGroup>