pub fn callback(
  label label: String,
  with callback: fn(String, String) -> Nil,
  time body: fn() -> a,
) -> a

let print_time = fn(label, elapsed) { io.println(label <> " took " <> elapsed) }

{
  use <- pocket_watch.callback("test", print_time)

  process.sleep(1000)
} // test took 1.0s

pub fn callback_us(
  label label: String,
  with callback: fn(String, Int) -> Nil,
  time body: fn() -> a,
) -> a

let print_time = fn(label, elapsed) {
  io.println(label <> " took " <> int.to_string(elapsed / 1_000) <> "ms")
}

{
  use <- pocket_watch.callback("test", print_time)

  process.sleep(1000)
} // test took 1000ms

pub fn simple(label: String, body: fn() -> a) -> a

{
  use <- pocket_watch.simple("test")

  process.sleep(1000)
} // pocket_watch [test]: took 1.0s