bjoernager/rust
bjoernager/rust
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Remove detail from label/note that is already available in other note

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Remove the "which is required by `{root_obligation}`" post-script in
"the trait `X` is not implemented for `Y`" explanation in E0277. This
information is already conveyed in the notes explaining requirements,
making it redundant while making the text (particularly in labels)
harder to read.

```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
  --> $DIR/wf-static-type.rs:10:13
   |
LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
   |             ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`
   |
   = note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
  --> $DIR/wf-static-type.rs:7:17
   |
LL | struct IsCopy<T:Copy> { t: T }
   |                 ^^^^ required by this bound in `IsCopy`
```
vs the prior

```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
  --> $DIR/wf-static-type.rs:10:13
   |
LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
   |             ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`, which is required by `Option<NotCopy>: Copy`
   |
   = note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
  --> $DIR/wf-static-type.rs:7:17
   |
LL | struct IsCopy<T:Copy> { t: T }
   |                 ^^^^ required by this bound in `IsCopy`
```
This commit is contained in:
Esteban Küber 2024-10-24 21:14:17 +00:00
parent 2dece5bb62
commit 5b54286640
223 changed files with 407 additions and 418 deletions
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4
tests/ui/function-pointer/unsized-ret.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `str` cannot be known at compilation t
LL | foo::<fn() -> str, _>(None, ());
| ^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: within `fn() -> str`, the trait `Sized` is not implemented for `str`, which is required by `fn() -> str: Fn<_>`
= help: within `fn() -> str`, the trait `Sized` is not implemented for `str`
= note: required because it appears within the type `fn() -> str`
note: required by a bound in `foo`
--> $DIR/unsized-ret.rs:5:11
@ -18,7 +18,7 @@ error[E0277]: the size for values of type `(dyn std::fmt::Display + 'a)` cannot
LL | foo::<for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a), _>(None, (&(),));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: within `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a)`, the trait `for<'a> Sized` is not implemented for `(dyn std::fmt::Display + 'a)`, which is required by `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a): Fn<_>`
= help: within `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a)`, the trait `for<'a> Sized` is not implemented for `(dyn std::fmt::Display + 'a)`
= note: required because it appears within the type `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a)`
note: required by a bound in `foo`
--> $DIR/unsized-ret.rs:5:11