(sort of dynamic) alias as a macro in Elixir

gistfile1.ex

# dynamic_alias.ex
defmodule DynamicAlias do
  @doc
  """
  The following macro will introduce an alias into the calling module replacing
  the last part of the module name with the contents of List.replace_at/3.

  This is useful if you want to automatically references a different module 
  without knowing the fully qualified module name, but I'm new to Elixir and
  there may be a better way to do this.

  See tests for a complete example.
  """
  defmacro __using__(_opts) do
    quote do
      alias unquote Module.split(__CALLER__.module) 
                      |> List.replace_at(-1, "Baz") 
                      |> Module.concat
    end
  end
end
 
# dynamic_alias_test
ExUnit.start

defmodule DynamicAlias.Baz do
  def baz(), do: :baz
end

defmodule DynamicAlias.Test do
  use ExUnit.Case
  use DynamicAlias

  test "DynamicAlias.Baz is aliased to Baz" do
    assert DynamicAlias.Baz.baz() == :baz
    assert Baz.baz() == :baz
  end
end