error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:11:13
   |
11 | fn input(_: Option<Option<u8>>) {
   |             ^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::option-option` implied by `-D warnings`

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:14:16
   |
14 | fn output() -> Option<Option<u8>> {
   |                ^^^^^^^^^^^^^^^^^^

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:18:27
   |
18 | fn output_nested() -> Vec<Option<Option<u8>>> {
   |                           ^^^^^^^^^^^^^^^^^^

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:23:30
   |
23 | fn output_nested_nested() -> Option<Option<Option<u8>>> {
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:28:8
   |
28 |     x: Option<Option<u8>>,
   |        ^^^^^^^^^^^^^^^^^^

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:32:23
   |
32 |     fn struct_fn() -> Option<Option<u8>> {
   |                       ^^^^^^^^^^^^^^^^^^

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:38:22
   |
38 |     fn trait_fn() -> Option<Option<u8>>;
   |                      ^^^^^^^^^^^^^^^^^^

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:42:11
   |
42 |     Tuple(Option<Option<u8>>),
   |           ^^^^^^^^^^^^^^^^^^

error: consider using `Option<T>` instead of `Option<Option<T>>` or a custom enum if you need to distinguish all 3 cases
  --> $DIR/option_option.rs:43:15
   |
43 |     Struct{x: Option<Option<u8>>},
   |               ^^^^^^^^^^^^^^^^^^

error: aborting due to 9 previous errors