delegate_functions_for.exs

defmacro delegate_functions_for(module, functions) do
  for {fun_name, fun_arity} <- functions do
    fun_args = Macro.generate_arguments(fun_arity, Macro.expand_literals(module, __CALLER__))

    quote do
      defdelegate unquote(fun_name)(unquote_splicing(fun_args)), to: unquote(module)
    end
  end
end