Restored Opt<T> and made a new FieldValue<T> type to replace old Opt<T>

1 files changed, 7 insertions, 6 deletions

diff --git a/src/fields/Field.ts b/src/fields/Field.ts
index 20d8bf5ed..2bfc9d1da 100644
--- a/src/fields/Field.ts
+++ b/src/fields/Field.ts
@@ -1,7 +1,7 @@
 
 import { Utils } from "../Utils";
 
-export function Cast<T extends Field>(field: Opt<Field>, ctor: { new(): T }): Opt<T> {
+export function Cast<T extends Field>(field: FieldValue<Field>, ctor: { new(): T }): Opt<T> {
     if (field) {
         if (ctor && field instanceof ctor) {
             return field;
@@ -14,7 +14,8 @@ export let FieldWaiting: FIELD_WAITING = "<Waiting>";
 export type FIELD_WAITING = "<Waiting>";
 export type FIELD_ID = string | undefined;
 export type DOC_ID = FIELD_ID;
-export type Opt<T> = T | undefined | FIELD_WAITING;
+export type Opt<T> = T | undefined;
+export type FieldValue<T> = Opt<T> | FIELD_WAITING;
 
 export abstract class Field {
     //FieldUpdated: TypedEvent<Opt<FieldUpdatedArgs>> = new TypedEvent<Opt<FieldUpdatedArgs>>();
@@ -28,18 +29,18 @@ export abstract class Field {
         this.id = id || Utils.GenerateGuid();
     }
 
-    Dereference(): Opt<Field> {
+    Dereference(): FieldValue<Field> {
         return this;
     }
-    DereferenceToRoot(): Opt<Field> {
+    DereferenceToRoot(): FieldValue<Field> {
         return this;
     }
 
-    DereferenceT<T extends Field = Field>(ctor: { new(): T }): Opt<T> {
+    DereferenceT<T extends Field = Field>(ctor: { new(): T }): FieldValue<T> {
         return Cast(this.Dereference(), ctor);
     }
 
-    DereferenceToRootT<T extends Field = Field>(ctor: { new(): T }): Opt<T> {
+    DereferenceToRootT<T extends Field = Field>(ctor: { new(): T }): FieldValue<T> {
         return Cast(this.DereferenceToRoot(), ctor);
     }