1.5.0: Added IntToLayerMask, marked QuaternionToEuler as obsolete as of 2021 and fixed a couple of bugs

- Drawer: Added IntToLayerMaskAttribute, if a raw int is wanted instead of LayerMask
- Drawer: Added option to either use full or short type name, when using SerializeReferenceTo
- Extension: Fixed issue, where GetValueType and GetValue for SerializedProperty would throw exceptions, if field is private

Editor/Drawers/IntToLayerMaskAttributeDrawer.cs

@@ -0,0 +1,57 @@
+using Module.Inspector.Editor.Utilities;
+using UnityEditor;
+using UnityEngine;
+
+namespace Module.Inspector.Editor
+{
+    [CustomPropertyDrawer(typeof(IntToLayerMaskAttribute))]
+    internal sealed class IntToLayerMaskAttributeDrawer : DrawerPropertyDrawer
+    {
+        private static string[] NAMES;
+        
+        public override bool Draw(Rect position, DrawerPropertyAttribute attribute, SerializedProperty property, GUIContent label, EditorPropertyUtility.Result result)
+        {
+            if (property.propertyType != SerializedPropertyType.Integer)
+                return false;
+            
+            FetchLayerNames();
+            
+            EditorGUI.BeginChangeCheck();
+            EditorGUI.BeginProperty(position, label, property);
+            {
+                property.intValue = EditorGUI.MaskField(position, label, property.intValue, NAMES);
+            }
+            EditorGUI.EndProperty();
+            bool changed = EditorGUI.EndChangeCheck();
+
+            if (changed)
+                property.serializedObject.ApplyModifiedProperties();
+            
+            return true;
+        }
+        
+        public override string GetErrorMessage(SerializedProperty property)
+        {
+            return "Only supports integers";
+        }
+        
+        
+        private static void FetchLayerNames()
+        {
+            if (NAMES != null)
+                return;
+
+            NAMES = new string[32];
+
+            for (var i = 0; i < 32; i++)
+            {
+                string str = LayerMask.LayerToName(i);
+
+                if (string.IsNullOrEmpty(str))
+                    str = $"Unused Layer #{i:00}";
+                
+                NAMES[i] = str;
+            }
+        }
+    }
+}