isCompound

implementations/javascript/packages/core/src/compound.ts

@@ -0,0 +1,8 @@
+import type { Compound, Value } from "./values";
+import type { DefaultPointer } from "./pointer";
+import { Dictionary, Set } from "./dictionary";
+
+export function isCompound<T = DefaultPointer>(x: Value<T>): x is Compound<T>
+{
+    return (Array.isArray(x) || Set.isSet(x) || Dictionary.isDictionary(x));
+}

implementations/javascript/packages/core/src/runtime.ts

@@ -1,6 +1,7 @@
 export * from './annotated';
 export * from './bytes';
 export * from './codec';
+export * from './compound';
 export * from './decoder';
 export * from './dictionary';
 export * from './encoder';