From 26af9562cc515627be4be8759b70ebfbab8bb83c Mon Sep 17 00:00:00 2001
From: bob <bcz@cs.brown.edu>
Date: Tue, 5 Feb 2019 17:41:12 -0500
Subject: first changes

---
 src/fields/Field.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/fields/Field.ts')

diff --git a/src/fields/Field.ts b/src/fields/Field.ts
index 1453e52a4..7f057afa8 100644
--- a/src/fields/Field.ts
+++ b/src/fields/Field.ts
@@ -10,7 +10,9 @@ export function Cast<T extends Field>(field: Opt<Field>, ctor: { new(): T }): Op
     return undefined;
 }
 
-export type Opt<T> = T | undefined;
+export type Waiting = "<Waiting>";
+export type Opt<T> = T | undefined | Waiting;
+export let WAITING: Waiting = "<Waiting>";
 
 export abstract class Field {
     //FieldUpdated: TypedEvent<Opt<FieldUpdatedArgs>> = new TypedEvent<Opt<FieldUpdatedArgs>>();
-- 
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