Delegate all functions to another module, with pattern match on first argument

delegate all functions to another module.ex

defmodule LikeMapModule do
  defstruct [data: %{}]

  # Delegates all functions of Map to Map, with first argument `data`
  for {fun, arity} <- Map.__info__(:functions), arity > 0 do
    args =
      arity
      |> Macro.generate_arguments(__MODULE__)
      |> Enum.with_index()
      |> Enum.map(fn {arg, idx} ->
        case idx do
          0 ->
            quote do
              %unquote(__MODULE__){} = unquote(arg)
            end

          _ ->
            arg
        end
      end)

    def unquote(fun)(unquote_splicing(args)) do
      [arg1 | rest] = unquote(args)
      args = [arg1.data | rest]

      result = Kernel.apply(Map, unquote(fun), args)

      # XXX: This creates problem in case of functions not returning the struct itself
      #   the snippet can probably be updated to address it
      %{arg1 | data: result}
    end
  end
end