feature.ex

defmodule Mnemonix.Feature do
  @moduledoc false

  # For an synopsis of this mechanism, refer to:
  # https://gist.github.com/christhekeele/e858881d0ca2053295c6e10d8692e6ea

  defmodule Registry do
    @moduledoc false
    defmacro __before_compile__(env) do
      for {feature, opts} <- Module.get_attribute(env.module, :features) do
        quote location: :keep do
          use Mnemonix.Delegator, [unquote_splicing(opts), module: unquote(feature)]
        end
      end
    end
  end

  defmacro __using__(opts) do
    quote location: :keep do
      @before_compile Registry
      Module.register_attribute(__MODULE__, :features, accumulate: true)
      Module.put_attribute(__MODULE__, :features, Keyword.pop(unquote(opts), :module))
    end
  end


end