Passing captured named function requiring arguments to another function?

Questions & Help Questions
,
1

I’ve been struggling with this for a few hours now and there must be an easy answer despite my inability to search and find answers.

So I have this pretty simple code:

  def tcp_port_open?(host, port) do
    case :gen_tcp.connect(String.to_charlist(host), port, []) do
      {:ok, socket} ->
        :gen_tcp.close(socket)
        true

      {:error, _} ->
        false
    end
  end

  def wait_for_true(fun), do: wait_for_true(fun, 10_000)
  def wait_for_true(_fun, 0), do: false
  def wait_for_true(fun, timeout) do
    case fun.() do
      true ->
        true

      false ->
        :timer.sleep(100)
        wait_for_true(fun, max(0, timeout - 100))
    end
  end

I’m not sure how to call wait_for_true passing the captured named function tcp_port_open? that needs args.

I’ve tried a few things but they all require Mod.fun/arity or local_fun/arity. Not sure how to pass arguments into the function like so:
wait_for_true(&tcp_port_open?("localhost", 4001))

Thanks!