Why cant I do ?0..9? ++ ?a..?z

[supple blaze]

I'd like to concatenate those two charlists, but plugin in VSCode turns it into ?0..(?9 ++ ?a..?z) and gives me this:

The call erlang:'++'
(57,
#{'struct' => 'Elixir.Range',
'first' => 97,
'last' => 122,
'step' => 1}) will never return since it differs in the 1st argument from the success typing arguments:
([any()],
any())ElixirLS Dialyzer

[sudden timber]

helo how are you (Steve here the unofficial nightshift support manager). Few things off the bat

1. ?0..9? is not valid
   b) ?a..?z is a valid range (but not a list)
   iii) ++ is for lists. Ranges are not lists until you use Enum.to_list() on them.

Let me know if you need more assistance

[supple blaze]

is there any way to concatenate ranges?

[sudden timber]

turn them to a list first