Function fnEngine

test/compute-engine/expression-properties.test.ts:427–433

()

  it('structural Function literal: still excludes its parameters', () => {
    const f = engine.box(['Function', ['Add', 'x', 'b'], 'x'], {
      structural: true,
    });
    expect(f.freeVariables).toEqual(['b']);
  });

  it('a node with no definition falls back to the spelling heuristic', () => {
    // `canonical: false` leaves the node unbound (no operator definition), so
    // there are no binding sites to consult: only the canonical
    // `Limits`/`Element` spellings are recognized, and `Tuple` is not.