I'm super new to elixir, so forgive me if the below doesn't make sense.

If I attempt to use a functional plug with the router macros e.g. match I get the error ** (UndefinedFunctionError) function :foo.init/1 is undefined (module :foo is not available). I'm pretty sure the issue is not with my plug, as it works when using the regular plug macro e.g. plug :foo.

Minimal reproduction below

defmodule Router do
  use Plug.Router

  plug :match
  plug :dispatch

  @spec foo(Plug.Conn.t(), any()) :: Plug.Conn.t()
  def foo(conn, _opts) do
    conn
  end

  match _, to: :foo
end

If I'm not making any errors then please consider this a feature request - The functional plugs are much more simple/concise, so it would be great to be able to use them in more places, if not everywhere, just for the sake of consistency.