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error[E0308]: mismatched types
--> $DIR/issue-100605.rs:4:18
|
LL | takes_option(&None);
| ------------ ^^^^^ expected `Option<&String>`, found `&Option<_>`
| |
| arguments to this function are incorrect
|
= note: expected enum `Option<&String>`
found reference `&Option<_>`
note: function defined here
--> $DIR/issue-100605.rs:1:4
|
LL | fn takes_option(_arg: Option<&String>) {}
| ^^^^^^^^^^^^ ---------------------
help: you can convert from `&Option<T>` to `Option<&T>` using `.as_ref()`
|
LL | takes_option(None.as_ref());
| ~~~~~~~~~~~~~
help: consider removing the borrow
|
LL - takes_option(&None);
LL + takes_option(None);
|
error[E0308]: mismatched types
--> $DIR/issue-100605.rs:8:18
|
LL | takes_option(&res);
| ------------ ^^^^
| | |
| | expected `Option<&String>`, found `&Option<String>`
| | help: you can convert from `&Option<T>` to `Option<&T>` using `.as_ref()`: `res.as_ref()`
| arguments to this function are incorrect
|
= note: expected enum `Option<&String>`
found reference `&Option<String>`
note: function defined here
--> $DIR/issue-100605.rs:1:4
|
LL | fn takes_option(_arg: Option<&String>) {}
| ^^^^^^^^^^^^ ---------------------
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0308`.
|
