Allow fields to be ignored

Author: limoka

Il2CppInterop.Runtime/Attributes/HideFromIl2CppAttribute.cs

@@ -6,7 +6,7 @@ namespace Il2CppInterop.Runtime.Attributes;
 ///     This attribute indicates that the target should not be exposed to IL2CPP in injected classes
 /// </summary>
 [AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Property |
-                AttributeTargets.Event)]
+                AttributeTargets.Event | AttributeTargets.Field)]
 public class HideFromIl2CppAttribute : Attribute
 {
 }

Il2CppInterop.Runtime/Injection/ClassInjector.cs

@@ -533,6 +533,8 @@ private static bool IsTypeSupported(Type type)
 
     private static bool IsFieldEligible(FieldInfo field)
     {
+        if (field.CustomAttributes.Any(it => typeof(HideFromIl2CppAttribute).IsAssignableFrom(it.AttributeType)))
+            return false;
         if (field.DeclaringType.IsValueType)
             return IsTypeSupported(field.FieldType);
         if (!field.FieldType.IsGenericType) return field.FieldType == typeof(Il2CppStringField);