Merge branch 'master' into data-visualization-view-naafi

1 files changed, 4 insertions, 0 deletions

diff --git a/src/fields/Types.ts b/src/fields/Types.ts
index 7e2aa5681..bf40a0d7b 100644
--- a/src/fields/Types.ts
+++ b/src/fields/Types.ts
@@ -76,6 +76,10 @@ export function Cast<T extends CastCtor>(field: FieldResult, ctor: T, defaultVal
     return defaultVal === null ? undefined : defaultVal;
 }
 
+export function DocCast(field: FieldResult, defaultVal?: Doc) {
+    return Cast(field, Doc, null) ?? defaultVal;
+}
+
 export function NumCast(field: FieldResult, defaultVal: number | null = 0) {
     return Cast(field, "number", defaultVal);
 }