src/new_fields/ObjectField.ts


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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]();
    }
}