fix: ellipsis op

Author: mhanberg

lib/spitfire.ex

@@ -215,6 +215,7 @@ defmodule Spitfire do
         :"{" -> &parse_tuple_literal/1
         :%{} -> &parse_map_literal/1
         :% -> &parse_struct_literal/1
+        :ellipsis_op -> &parse_ellipsis_op/1
         nil -> &parse_nil_literal/1
         _ -> nil
       end
@@ -1409,6 +1410,10 @@ defmodule Spitfire do
     end
   end
 
+  defp parse_ellipsis_op(parser) do
+    {{:..., current_meta(parser), []}, parser}
+  end
+
   defp parse_struct_literal(%{current_token: {:%, _}} = parser) do
     meta = current_meta(parser)
     parser = next_token(parser)

test/spitfire_test.exs

@@ -1856,6 +1856,17 @@ defmodule SpitfireTest do
 
       assert Spitfire.parse(code, line: 12, column: 7) == s2q(code, line: 12, column: 7)
     end
+
+    test "ellipsis_op ..." do
+      code = ~S'''
+      @callback a([B.spec(), ...], C.t(), D.t()) :: [
+          E.spec(),
+          ...
+        ]
+      '''
+
+      assert Spitfire.parse(code) == s2q(code)
+    end
   end
 
   describe "code with errors" do