const printer = { [Symbol.dispose]() { console.log("Принтер закрыт"); } };
printer[Symbol.dispose]();

function open(name) {
  console.log("Открыт", name);
  return { [Symbol.dispose]() { console.log("Закрыт", name); } };
}
{
  using a = open("принтер");
  using b = open("касса");
  console.log("Печатаем чек");
}

async function main() {
  {
    await using conn = { async [Symbol.asyncDispose]() { await wait(50); console.log("Соединение закрыто"); } };
    console.log("Работаем");
  }
  console.log("После блока");
}
await main();

const stack = new DisposableStack();
stack.defer(() => console.log("уборка 1"));
stack.adopt("файл", (f) => console.log("закрыт", f));
const moved = stack.move();
console.log(stack.disposed);
moved.dispose();
console.log(moved.disposed);

const stack = new DisposableStack();
stack.use({ [Symbol.dispose]() { console.log("ресурс освобождён"); } });
stack[Symbol.dispose]();
console.log(stack.disposed);

const s = new AsyncDisposableStack();
s.defer(async () => { await wait(20); console.log("асинхронная уборка"); });
await s.disposeAsync();
console.log(s.disposed);

const s = new AsyncDisposableStack();
s.use({ async [Symbol.asyncDispose]() { console.log("закрыто"); } });
s.adopt(1, async () => console.log("adopt"));
await s.move().disposeAsync();

try {
  using r = { [Symbol.dispose]() { throw new Error("не закрылся"); } };
  throw new Error("сбой работы");
} catch (e) {
  console.log(e.name, e.error.message, "/", e.suppressed.message);
}