Lykn

export

The export form wraps declarations — both surface and kernel forms.

Exporting Surface Forms

(export (func add
  :args (:number a :number b)
  :returns :number
  :body (+ a b)))

export function add(a, b) {
  if (typeof a !== "number" || Number.isNaN(a))
    throw new TypeError(
      "add: arg 'a' expected number, got " + typeof a);

  if (typeof b !== "number" || Number.isNaN(b))
    throw new TypeError(
      "add: arg 'b' expected number, got " + typeof b);

  const result__gensym0 = a + b;
  if (typeof result__gensym0 !== "number" || Number.isNaN(result__gensym0))
    throw new TypeError(
      "add: return value expected number, got " + typeof result__gensym0);

  return result__gensym0;
}

(export (bind VERSION "0.4.0"))

export const VERSION = "0.4.0";

The surface form is expanded first (type checks, contracts, immutability), then the result is wrapped in export. You get the full safety of surface func and the visibility of export.

Default Export

(export default my-fn)

export default myFn;

What’s Banned: Re-export-all

;; NOT SUPPORTED in Lykn
;; (export (* from "utils"))

export * makes the module’s public API invisible at the export site. Explicit lists are better — the reader of your module file can see exactly what’s exported without following chains of re-exports.