Fix exposed type (#41)

It's clear, from the implementation, a binary() is also expected
kivra · Jul 24, 2024 · f5fdd13 · f5fdd13
1 parent 26cc5f2
commit f5fdd13
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/s2_hash.erl b/src/s2_hash.erl
@@ -43,7 +43,7 @@ luhn(String) when is_list(String) ->
   {_, Sum} = lists:foldr(fun luhn_fold/2, {odd, 0}, IntList),
   (Sum*9) rem 10.
 
--spec luhn_validate(string()) -> boolean().
+-spec luhn_validate(binary() | string()) -> boolean().
 luhn_validate(String) when is_binary(String) ->
   luhn_validate(binary_to_list(String));
 luhn_validate(String) when is_list(String) ->