tests/ui/issues/issue-100605.stderr

   1 error[E0308]: mismatched types
   2   --> $DIR/issue-100605.rs:4:18
   3    |
   4 LL |     takes_option(&None);
   5    |     ------------ ^^^^^ expected enum `Option`, found `&Option<_>`
   6    |     |
   7    |     arguments to this function are incorrect
   8    |
   9    = note:   expected enum `Option<&String>`
  10            found reference `&Option<_>`
  11 note: function defined here
  12   --> $DIR/issue-100605.rs:1:4
  13    |
  14 LL | fn takes_option(_arg: Option<&String>) {}
  15    |    ^^^^^^^^^^^^ ---------------------
  16 help: you can convert from `&Option<T>` to `Option<&T>` using `.as_ref()`
  17    |
  18 LL |     takes_option(None.as_ref());
  19    |                  ~~~~~~~~~~~~~
  20 help: consider removing the borrow
  21    |
  22 LL -     takes_option(&None);
  23 LL +     takes_option(None);
  24    |
  25
  26 error[E0308]: mismatched types
  27   --> $DIR/issue-100605.rs:8:18
  28    |
  29 LL |     takes_option(&res);
  30    |     ------------ ^^^^
  31    |     |            |
  32    |     |            expected enum `Option`, found `&Option<String>`
  33    |     |            help: you can convert from `&Option<T>` to `Option<&T>` using `.as_ref()`: `res.as_ref()`
  34    |     arguments to this function are incorrect
  35    |
  36    = note:   expected enum `Option<&String>`
  37            found reference `&Option<String>`
  38 note: function defined here
  39   --> $DIR/issue-100605.rs:1:4
  40    |
  41 LL | fn takes_option(_arg: Option<&String>) {}
  42    |    ^^^^^^^^^^^^ ---------------------
  43
  44 error: aborting due to 2 previous errors
  45
  46 For more information about this error, try `rustc --explain E0308`.