Writing a library for use in both Elixir and Erlang

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So if @jmitchell would like to be able to call Foo.bar nicely from both Elixir and foo.bar from Erlang, would this be an acceptable approach to expose the api for both ?

defmodule Foo.Impl do
  defmacro __using__(_) do
    quote do
      def bar(), do: # ...
     # more of Foo public API
   end
  end
end

defmodule :foo do
   @moduledoc "For use from erlang"
   use Foo.Impl
end

defmodule Foo do
   @moduledoc "Alchemist way"
   use Foo.Impl
end
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