Skip to content

Account for unmet T: !Copy in E0277 message #121875

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Mar 2, 2024
Merged

Account for unmet T: !Copy in E0277 message #121875

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
d89c2c5
Small clean up of E0277 message logic
estebank Feb 29, 2024
7f97dfe
Account for unmet `T: !Copy` in E0277 message
estebank Feb 29, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
25 changes: 13 additions & 12 deletions compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4769,20 +4769,21 @@ pub(super) fn get_explanation_based_on_obligation<'tcx>(
} else {
String::new()
};
match ty_desc {
Some(desc) => format!(
"{}the trait `{}` is not implemented for {} `{}`{post}",
pre_message,
trait_predicate.print_modifiers_and_trait_path(),
desc,
tcx.short_ty_string(trait_ref.skip_binder().self_ty(), &mut None),
),
None => format!(
"{}the trait `{}` is not implemented for `{}`{post}",
pre_message,
let desc = match ty_desc {
Some(desc) => format!(" {desc}"),
None => String::new(),
};
if let ty::ImplPolarity::Positive = trait_predicate.polarity() {
format!(
"{pre_message}the trait `{}` is not implemented for{desc} `{}`{post}",
trait_predicate.print_modifiers_and_trait_path(),
tcx.short_ty_string(trait_ref.skip_binder().self_ty(), &mut None),
),
)
} else {
// "the trait bound `T: !Send` is not satisfied" reads better than "`!Send` is
// not implemented for `T`".
// FIXME: add note explaining explicit negative trait bounds.
format!("{pre_message}the trait bound `{trait_predicate}` is not satisfied{post}")
}
}
}
Expand Down
8 changes: 4 additions & 4 deletions tests/ui/traits/negative-bounds/simple.stderr
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@ error[E0277]: the trait bound `T: !Copy` is not satisfied
--> $DIR/simple.rs:10:16
|
LL | not_copy::<T>();
| ^ the trait `!Copy` is not implemented for `T`
| ^ the trait bound `T: !Copy` is not satisfied
|
note: required by a bound in `not_copy`
--> $DIR/simple.rs:3:16
Expand All @@ -14,7 +14,7 @@ error[E0277]: the trait bound `T: !Copy` is not satisfied
--> $DIR/simple.rs:15:16
|
LL | not_copy::<T>();
| ^ the trait `!Copy` is not implemented for `T`
| ^ the trait bound `T: !Copy` is not satisfied
|
note: required by a bound in `not_copy`
--> $DIR/simple.rs:3:16
Expand All @@ -26,7 +26,7 @@ error[E0277]: the trait bound `Copyable: !Copy` is not satisfied
--> $DIR/simple.rs:30:16
|
LL | not_copy::<Copyable>();
| ^^^^^^^^ the trait `!Copy` is not implemented for `Copyable`
| ^^^^^^^^ the trait bound `Copyable: !Copy` is not satisfied
|
= help: the trait `Copy` is implemented for `Copyable`
note: required by a bound in `not_copy`
Expand All @@ -44,7 +44,7 @@ error[E0277]: the trait bound `NotNecessarilyCopyable: !Copy` is not satisfied
--> $DIR/simple.rs:37:16
|
LL | not_copy::<NotNecessarilyCopyable>();
| ^^^^^^^^^^^^^^^^^^^^^^ the trait `!Copy` is not implemented for `NotNecessarilyCopyable`
| ^^^^^^^^^^^^^^^^^^^^^^ the trait bound `NotNecessarilyCopyable: !Copy` is not satisfied
|
note: required by a bound in `not_copy`
--> $DIR/simple.rs:3:16
Expand Down