Support forward-referencing (or late-bound references) from closures

[sam-goodwin]

Keywords

late-bound, hoisted, forward reference

Description

Our interpreters eagerly evaluate closures which has the unfortunate consequence of not allowing closures such as those in a StepFunction or Function to call an Integration defined after it.

new Function(scope, id, async () => {
  // error: queue is not defined
  await queue.sendMessage({ .. });
});

const queue = new Queue(scope, id);

Instead, evaluation should happen during synthesis and after the initial Construct tree is built.