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frontend/src/lib/components/grid/messages.ts

@@ -2,7 +2,7 @@ interface LeadMsg {
 	msg_type: 'set' | 'get' | 'error' | 'bulk';
 	cell?: CellRef;
 	raw?: string;
-	eval?: Literal;
+	eval?: Eval;
 	bulk_msgs?: Array<LeadMsg>;
 }
 
@@ -13,8 +13,17 @@ interface CellRef {
 
 type LiteralType = 'Number' | 'Boolean' | 'String';
 type LiteralValue = number | string | boolean;
+type EvalRange = Array<Eval>;
 
 interface Literal {
 	type: LiteralType;
 	value: LiteralValue;
 }
+
+interface EvalCellRef {
+	eval: Eval;
+	reference: CellRef;
+}
+
+// Tagged union
+type Eval = { literal: Literal } | { cellref: EvalCellRef } | { range: Range } | 'unset';