testing testing branch aren't stable

Author: Cippo

InterfaceReference/Examples/Examples.unity

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InterfaceReference/Scripts/Attributes/Expose.cs

@@ -0,0 +1,79 @@
+/*
+ *  Author: Alessandro Salani (Cippman)
+ */
+
+using System;
+using CippSharp.Interfaces;
+using UnityEditor;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+namespace CippSharp.Interfaces
+{
+     public class ExposeAttribute : Attribute
+     {
+            ExposedReference<>
+     }
+}
+
+
+#if UNITY_EDITOR
+namespace CippSharpEditor.Interfaces
+{
+    /// <summary>
+    /// Custom drawer of TypeFilterAttribute. 
+    /// </summary>
+    [CustomPropertyDrawer(typeof(ExposeAttribute))]
+    public class ExposeAttributeDrawer : PropertyDrawer
+    {
+        private object target = null;
+        private readonly Object nullObject = null;
+        private Object TargetObject
+        {
+            get { return target != null ? (Object)target : nullObject; }
+            set { target = value; }
+        }
+        
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        {
+            return EditorGUI.GetPropertyHeight(property, label, property.isExpanded && property.hasChildren);
+        }
+
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            ExposeAttribute exposeAttribute = attribute as ExposeAttribute;
+            Type fieldType = fieldInfo.FieldType;
+            if (property.propertyType == SerializedPropertyType.Generic && fieldType.IsInterface)
+            {
+                if (exposeAttribute != null)
+                {
+                    target = fieldInfo.GetValue(property.serializedObject.targetObject);
+                    if (target == null)
+                    {    
+                        TargetObject = EditorGUI.ObjectField(position, TargetObject, typeof(Object), true);
+                        fieldInfo.SetValue(property.serializedObject.targetObject, TargetObject);
+                    }
+                    else if (target is Object)
+                    {
+                        TargetObject = EditorGUI.ObjectField(position, TargetObject, typeof(Object), true);
+                        fieldInfo.SetValue(property.serializedObject.targetObject, TargetObject);
+                    }
+                    else
+                    {
+                        //Not implemented for interfaces that aren't also of type Object.
+                    }
+                }
+                else
+                {
+                    Debug.LogError("Failed to assign the attribute.");
+                }
+            }
+            else
+            {
+                Debug.LogWarning("Expose Attribute supports only Interface Reference fields.");
+            }
+        }
+    }
+}
+#endif
+

InterfaceReference/Scripts/Attributes/Expose.cs.meta

@@ -0,0 +1,9 @@
+using UnityEngine;
+
+namespace CippSharp.Interfaces.Examples
+{
+    public class ExposedInterfaceReference : MonoBehaviour
+    {
+        [SerializeField, Expose] public ICustomInterfaceExample customInterfaceExample = null;
+    }
+}