867bd099b8
improve tip for inaccessible traits
Improve the tips when the candidate method is from an inaccessible trait.
For example:
```rs
mod m {
trait Trait {
fn f() {}
}
impl<T> Trait for T {}
}
fn main() {
struct S;
S::f();
}
```
The difference between before and now is:
```diff
error[E0599]: no function or associated item named `f` found for struct `S` in the current scope
--> ./src/main.rs:88:6
|
LL | struct S;
| -------- function or associated item `f` not found for this struct
LL | S::f();
| ^ function or associated item not found in `S`
|
= help: items from traits can only be used if the trait is implemented and in scope
- help: trait `Trait` which provides `f` is implemented but not in scope; perhaps you want to import it
+ help: trait `crate:Ⓜ️:Trait` which provides `f` is implemented but not reachable
|
- LL + use crate:Ⓜ️:Trait;
|
```
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