More private

Author: josevalim

lib/elixir/lib/module/types/descr.ex

@@ -2995,7 +2995,6 @@ defmodule Module.Types.Descr do
     end
   end
 
-  # TODO: Optimize this
   defp bitmap_to_domain_keys(bitmap) do
     [
       if((bitmap &&& @bit_binary) != 0, do: domain_key(:binary)),
@@ -3009,7 +3008,7 @@ defmodule Module.Types.Descr do
     |> Enum.reject(&is_nil/1)
   end
 
-  def nil_or_type(type), do: union(type, atom([nil]))
+  defp nil_or_type(type), do: union(type, atom([nil]))
 
   defp unfold_domains(:closed), do: %{}
 

lib/elixir/test/elixir/module/types/descr_test.exs

@@ -24,6 +24,7 @@ defmodule Module.Types.DescrTest do
   defp tuple_of_size(n) when is_integer(n) and n >= 0, do: tuple(List.duplicate(term(), n))
   defp list(elem_type, tail_type), do: union(empty_list(), non_empty_list(elem_type, tail_type))
   defp map_with_default(descr), do: open_map([], if_set(descr))
+  defp nil_or_type(type), do: union(type, atom([nil]))
 
   describe "union" do
     test "bitmap" do