From 47ecf8d30f4aa5e25a659fc7f3c0c1487420150e Mon Sep 17 00:00:00 2001
From: Sam Wilkins <abdullah_ahmed@brown.edu>
Date: Thu, 9 May 2019 20:59:10 -0400
Subject: merge with master, but haven't reconciled internal and external
 linking

---
 src/new_fields/ObjectField.ts | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 src/new_fields/ObjectField.ts

(limited to 'src/new_fields/ObjectField.ts')

diff --git a/src/new_fields/ObjectField.ts b/src/new_fields/ObjectField.ts
new file mode 100644
index 000000000..f276bfa67
--- /dev/null
+++ b/src/new_fields/ObjectField.ts
@@ -0,0 +1,18 @@
+import { Doc } from "./Doc";
+import { RefField } from "./RefField";
+
+export const OnUpdate = Symbol("OnUpdate");
+export const Parent = Symbol("Parent");
+export const Copy = Symbol("Copy");
+
+export abstract class ObjectField {
+    protected [OnUpdate](diff?: any) { };
+    private [Parent]?: RefField | ObjectField;
+    abstract [Copy](): ObjectField;
+}
+
+export namespace ObjectField {
+    export function MakeCopy<T extends ObjectField>(field: T) {
+        return field[Copy]();
+    }
+}
-- 
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