rust/tests/ui/suggestions/derive-macro-missing-bounds.stderr
Esteban Küber 6efddac288 Provide more context on derived obligation error primary label
Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:

```
error[E0277]: the trait bound `i32: Bar` is not satisfied
 --> f100.rs:6:6
  |
6 |     <i32 as Foo>::foo();
  |      ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
  |
help: this trait has no implementations, consider adding one
 --> f100.rs:2:1
  |
2 | trait Bar {}
  | ^^^^^^^^^
note: required for `i32` to implement `Foo`
 --> f100.rs:3:14
  |
3 | impl<T: Bar> Foo for T {}
  |         ---  ^^^     ^
  |         |
  |         unsatisfied trait bound introduced here
```

Fix #40120.
2024-01-30 21:28:18 +00:00

115 lines
5.3 KiB
Plaintext

error[E0277]: `a::Inner<T>` doesn't implement `Debug`
--> $DIR/derive-macro-missing-bounds.rs:12:21
|
LL | #[derive(Debug)]
| ----- in this derive macro expansion
LL | struct Outer<T>(Inner<T>);
| ^^^^^^^^ `a::Inner<T>` cannot be formatted using `{:?}`
|
= help: the trait `Debug` is not implemented for `a::Inner<T>`, which is required by `&a::Inner<T>: Debug`
= note: add `#[derive(Debug)]` to `a::Inner<T>` or manually `impl Debug for a::Inner<T>`
= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider annotating `a::Inner<T>` with `#[derive(Debug)]`
|
LL + #[derive(Debug)]
LL | struct Inner<T>(T);
|
help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
|
LL | struct Outer<T>(Inner<T>) where a::Inner<T>: Debug;
| ++++++++++++++++++++++++
error[E0277]: the trait bound `T: c::Trait` is not satisfied
--> $DIR/derive-macro-missing-bounds.rs:41:21
|
LL | #[derive(Debug)]
| ----- in this derive macro expansion
LL | struct Outer<T>(Inner<T>);
| ^^^^^^^^ the trait `c::Trait` is not implemented for `T`, which is required by `&c::Inner<T>: Debug`
|
note: required for `c::Inner<T>` to implement `Debug`
--> $DIR/derive-macro-missing-bounds.rs:34:28
|
LL | impl<T: Debug + Trait> Debug for Inner<T> {
| ----- ^^^^^ ^^^^^^^^
| |
| unsatisfied trait bound introduced here
= note: 1 redundant requirement hidden
= note: required for `&c::Inner<T>` to implement `Debug`
= note: required for the cast from `&&c::Inner<T>` to `&dyn Debug`
= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider restricting type parameter `T`
|
LL | struct Outer<T: c::Trait>(Inner<T>);
| ++++++++++
error[E0277]: the trait bound `T: d::Trait` is not satisfied
--> $DIR/derive-macro-missing-bounds.rs:56:21
|
LL | #[derive(Debug)]
| ----- in this derive macro expansion
LL | struct Outer<T>(Inner<T>);
| ^^^^^^^^ the trait `d::Trait` is not implemented for `T`, which is required by `&d::Inner<T>: Debug`
|
note: required for `d::Inner<T>` to implement `Debug`
--> $DIR/derive-macro-missing-bounds.rs:49:13
|
LL | impl<T> Debug for Inner<T> where T: Debug, T: Trait {
| ^^^^^ ^^^^^^^^ ----- unsatisfied trait bound introduced here
= note: 1 redundant requirement hidden
= note: required for `&d::Inner<T>` to implement `Debug`
= note: required for the cast from `&&d::Inner<T>` to `&dyn Debug`
= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider restricting type parameter `T`
|
LL | struct Outer<T: d::Trait>(Inner<T>);
| ++++++++++
error[E0277]: the trait bound `T: e::Trait` is not satisfied
--> $DIR/derive-macro-missing-bounds.rs:71:21
|
LL | #[derive(Debug)]
| ----- in this derive macro expansion
LL | struct Outer<T>(Inner<T>);
| ^^^^^^^^ the trait `e::Trait` is not implemented for `T`, which is required by `&e::Inner<T>: Debug`
|
note: required for `e::Inner<T>` to implement `Debug`
--> $DIR/derive-macro-missing-bounds.rs:64:13
|
LL | impl<T> Debug for Inner<T> where T: Debug + Trait {
| ^^^^^ ^^^^^^^^ ----- unsatisfied trait bound introduced here
= note: 1 redundant requirement hidden
= note: required for `&e::Inner<T>` to implement `Debug`
= note: required for the cast from `&&e::Inner<T>` to `&dyn Debug`
= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider restricting type parameter `T`
|
LL | struct Outer<T: e::Trait>(Inner<T>);
| ++++++++++
error[E0277]: the trait bound `T: f::Trait` is not satisfied
--> $DIR/derive-macro-missing-bounds.rs:86:21
|
LL | #[derive(Debug)]
| ----- in this derive macro expansion
LL | struct Outer<T>(Inner<T>);
| ^^^^^^^^ the trait `f::Trait` is not implemented for `T`, which is required by `&f::Inner<T>: Debug`
|
note: required for `f::Inner<T>` to implement `Debug`
--> $DIR/derive-macro-missing-bounds.rs:79:20
|
LL | impl<T: Debug> Debug for Inner<T> where T: Trait {
| ^^^^^ ^^^^^^^^ ----- unsatisfied trait bound introduced here
= note: 1 redundant requirement hidden
= note: required for `&f::Inner<T>` to implement `Debug`
= note: required for the cast from `&&f::Inner<T>` to `&dyn Debug`
= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider restricting type parameter `T`
|
LL | struct Outer<T: f::Trait>(Inner<T>);
| ++++++++++
error: aborting due to 5 previous errors
For more information about this error, try `rustc --explain E0277`.