rust/tests/ui/traits/item-privacy.stderr
bors 3c0f019b3c Auto merge of #125852 - bvanjoi:improve-tip-for-invisible-trait, r=compiler-errors
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;
   |
```
2024-06-19 06:19:22 +00:00

208 lines
6.4 KiB
Plaintext

error[E0599]: no method named `a` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:67:7
|
LL | struct S;
| -------- method `a` not found for this struct
...
LL | S.a();
| ^
|
= help: items from traits can only be used if the trait is implemented and in scope
= help: trait `method::A` which provides `a` is implemented but not reachable
help: there is a method `b` with a similar name
|
LL | S.b();
| ~
error[E0599]: no method named `b` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:68:7
|
LL | struct S;
| -------- method `b` not found for this struct
...
LL | fn b(&self) { }
| - the method is available for `S` here
...
LL | S.b();
| ^
|
= help: items from traits can only be used if the trait is in scope
help: trait `B` which provides `b` is implemented but not in scope; perhaps you want to import it
|
LL + use method::B;
|
help: there is a method `c` with a similar name
|
LL | S.c();
| ~
error[E0624]: method `a` is private
--> $DIR/item-privacy.rs:72:7
|
LL | fn a(&self) { }
| ----------- private method defined here
...
LL | c.a();
| ^ private method
error[E0599]: no function or associated item named `a` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:78:8
|
LL | struct S;
| -------- function or associated item `a` not found for this struct
...
LL | S::a(&S);
| ^ 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 `method::A` which provides `a` is implemented but not reachable
help: there is an associated constant `B` with a similar name
--> $DIR/item-privacy.rs:29:9
|
LL | const B: u8 = 0;
| ^^^^^^^^^^^
error[E0599]: no function or associated item named `b` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:80:8
|
LL | struct S;
| -------- function or associated item `b` not found for this struct
...
LL | S::b(&S);
| ^ function or associated item not found in `S`
|
= help: items from traits can only be used if the trait is in scope
help: there is an associated constant `B` with a similar name
--> $DIR/item-privacy.rs:29:9
|
LL | const B: u8 = 0;
| ^^^^^^^^^^^
help: trait `B` which provides `b` is implemented but not in scope; perhaps you want to import it
|
LL + use method::B;
|
error[E0624]: method `a` is private
--> $DIR/item-privacy.rs:84:14
|
LL | fn a(&self) { }
| ----------- private method defined here
...
LL | <dyn C>::a(&S);
| ^ private method
error[E0599]: no associated item named `A` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:97:8
|
LL | struct S;
| -------- associated item `A` not found for this struct
...
LL | S::A;
| ^ associated item not found in `S`
|
= help: items from traits can only be used if the trait is implemented and in scope
= help: trait `assoc_const::A` which provides `A` is implemented but not reachable
help: there is an associated constant `B` with a similar name
|
LL | S::B;
| ~
error[E0599]: no associated item named `B` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:98:8
|
LL | struct S;
| -------- associated item `B` not found for this struct
...
LL | S::B;
| ^ associated item not found in `S`
|
= help: items from traits can only be used if the trait is in scope
help: there is a method `b` with a similar name
--> $DIR/item-privacy.rs:11:9
|
LL | fn b(&self) { }
| ^^^^^^^^^^^
help: trait `B` which provides `B` is implemented but not in scope; perhaps you want to import it
|
LL + use assoc_const::B;
|
error[E0624]: associated constant `A` is private
--> $DIR/item-privacy.rs:101:14
|
LL | const A: u8 = 0;
| ----------- private associated constant defined here
...
LL | <dyn C>::A;
| ^ private associated constant
error[E0038]: the trait `assoc_const::C` cannot be made into an object
--> $DIR/item-privacy.rs:101:6
|
LL | <dyn C>::A;
| ^^^^^ `assoc_const::C` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/item-privacy.rs:25:15
|
LL | const A: u8 = 0;
| ^ ...because it contains this associated `const`
...
LL | const B: u8 = 0;
| ^ ...because it contains this associated `const`
...
LL | pub trait C: A + B {
| - this trait cannot be made into an object...
LL | const C: u8 = 0;
| ^ ...because it contains this associated `const`
= help: consider moving `C` to another trait
= help: consider moving `A` to another trait
= help: consider moving `B` to another trait
= help: only type `S` implements the trait, consider using it directly instead
error[E0223]: ambiguous associated type
--> $DIR/item-privacy.rs:115:12
|
LL | let _: S::A;
| ^^^^
|
help: if there were a trait named `Example` with associated type `A` implemented for `S`, you could use the fully-qualified path
|
LL | let _: <S as Example>::A;
| ~~~~~~~~~~~~~~~~~
error[E0223]: ambiguous associated type
--> $DIR/item-privacy.rs:116:12
|
LL | let _: S::B;
| ^^^^ help: use fully-qualified syntax: `<S as assoc_ty::B>::B`
error[E0223]: ambiguous associated type
--> $DIR/item-privacy.rs:117:12
|
LL | let _: S::C;
| ^^^^ help: use fully-qualified syntax: `<S as assoc_ty::C>::C`
error[E0624]: associated type `A` is private
--> $DIR/item-privacy.rs:119:12
|
LL | type A = u8;
| ------ the associated type is defined here
...
LL | let _: T::A;
| ^^^^ private associated type
error[E0624]: associated type `A` is private
--> $DIR/item-privacy.rs:128:9
|
LL | type A = u8;
| ------ the associated type is defined here
...
LL | A = u8,
| ^^^^^^ private associated type
error: aborting due to 15 previous errors
Some errors have detailed explanations: E0038, E0223, E0599, E0624.
For more information about an error, try `rustc --explain E0038`.