From f9ae7b76cb2092290da03ccb8fd14f6ab91cca89 Mon Sep 17 00:00:00 2001
From: Bradlee Speice <bradlee@speice.io>
Date: Mon, 22 Apr 2019 12:01:01 -0400
Subject: [PATCH] Add an UnknownEnum error type, make KaitaiStruct optional for
 parents

---
 src/lib.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 8002a3f..71dd749 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,6 +4,7 @@ use std::io;
 pub enum KaitaiError<'a> {
     InvalidContents { actual: &'a [u8] },
     IoError(io::Error),
+    UnknownEnum(u64),
 }
 
 impl<'a> From<io::Error> for KaitaiError<'a> {
@@ -15,7 +16,7 @@ impl<'a> From<io::Error> for KaitaiError<'a> {
 pub type Result<'a, T> = std::result::Result<T, KaitaiError<'a>>;
 
 pub trait KaitaiStruct<'a> {
-    type Parent: KaitaiStruct<'a>;
+    type Parent: ?KaitaiStruct<'a>;
     type Root: KaitaiStruct<'a>;
 
     /// Create a new instance of this struct; if we are the root node,