defmodule M do
  defmacro __using__(_args) do
    quote do
      @count 0
      import unquote(__MODULE__), only: :macros
    end
  end

  defmacro p do
    quote do
      @count @count + 1

      def p_unquote(@count), do: @count
    end
  end
end

defmodule A do
  use M

  p()
  p()
  p()
end

IO.puts A.p_1()