invocationless.js

const Ω = new Proxy(new WeakMap, {
  set (weakmap, reference, input) {
    const invocable = eval(reference);
    if (typeof invocable != 'function') return;
    weakmap.set(invocable,
      Array.isArray(input)
        ? invocable(...input)
        : invocable(input)
    );
  },
  get (weakmap, reference) {
    const invocable = eval(reference);
    return weakmap.get(invocable);
  },
  deleteProperty (weakmap, reference) {
    const invocable = eval(reference);
    weakmap.delete(invocable);
  },
  has (weakmap, reference) {
    const invocable = eval(reference);
    return weakmap.has(invocable);
  }
});