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Rollup merge of #139374 - oli-obk:const-trait-bound, r=compiler-errors

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Use the span of the whole bound when the diagnostic talks about a bound

While it makes sense that the host predicate only points to the `~const` part, as whether the actual trait bound is satisfied is checked separately, the user facing diagnostic is talking about the entire trait bound, at which point it makes more sense to just highlight the entire bound

r? `@compiler-errors` or `@fee1-dead`
This commit is contained in:
Matthias Krüger 2025-04-04 21:55:00 +02:00 committed by GitHub
commit f074bbff7a
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GPG Key ID: B5690EEEBB952194
18 changed files with 33 additions and 33 deletions
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4
compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
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@ -838,7 +838,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
| PredicateFilter::SelfOnly | PredicateFilter::SelfOnly
| PredicateFilter::SelfAndAssociatedTypeBounds => { | PredicateFilter::SelfAndAssociatedTypeBounds => {
match constness { match constness {
hir::BoundConstness::Always(span) => { hir::BoundConstness::Always(_) => {
if polarity == ty::PredicatePolarity::Positive { if polarity == ty::PredicatePolarity::Positive {
bounds.push(( bounds.push((
poly_trait_ref poly_trait_ref
@ -864,7 +864,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
// in `lower_assoc_item_constraint`. // in `lower_assoc_item_constraint`.
PredicateFilter::ConstIfConst | PredicateFilter::SelfConstIfConst => { PredicateFilter::ConstIfConst | PredicateFilter::SelfConstIfConst => {
match constness { match constness {
hir::BoundConstness::Maybe(span) => { hir::BoundConstness::Maybe(_) => {
if polarity == ty::PredicatePolarity::Positive { if polarity == ty::PredicatePolarity::Positive {
bounds.push(( bounds.push((
poly_trait_ref poly_trait_ref

2
tests/ui/consts/const-block-const-bound.stderr
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@ -10,7 +10,7 @@ note: required by a bound in `f`
--> $DIR/const-block-const-bound.rs:6:15 --> $DIR/const-block-const-bound.rs:6:15
| |
LL | const fn f<T: ~const Destruct>(x: T) {} LL | const fn f<T: ~const Destruct>(x: T) {}
| ^^^^^^ required by this bound in `f` | ^^^^^^^^^^^^^^^ required by this bound in `f`
error: aborting due to 1 previous error error: aborting due to 1 previous error

2
tests/ui/traits/const-traits/assoc-type.current.stderr
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@ -8,7 +8,7 @@ note: required by a bound in `Foo::Bar`
--> $DIR/assoc-type.rs:33:15 --> $DIR/assoc-type.rs:33:15
| |
LL | type Bar: ~const Add; LL | type Bar: ~const Add;
| ^^^^^^ required by this bound in `Foo::Bar` | ^^^^^^^^^^ required by this bound in `Foo::Bar`
error: aborting due to 1 previous error error: aborting due to 1 previous error

2
tests/ui/traits/const-traits/assoc-type.next.stderr
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@ -8,7 +8,7 @@ note: required by a bound in `Foo::Bar`
--> $DIR/assoc-type.rs:33:15 --> $DIR/assoc-type.rs:33:15
| |
LL | type Bar: ~const Add; LL | type Bar: ~const Add;
| ^^^^^^ required by this bound in `Foo::Bar` | ^^^^^^^^^^ required by this bound in `Foo::Bar`
error: aborting due to 1 previous error error: aborting due to 1 previous error

2
tests/ui/traits/const-traits/call-generic-method-nonconst.stderr
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@ -10,7 +10,7 @@ note: required by a bound in `equals_self`
--> $DIR/call-generic-method-nonconst.rs:17:25 --> $DIR/call-generic-method-nonconst.rs:17:25
| |
LL | const fn equals_self<T: ~const Foo>(t: &T) -> bool { LL | const fn equals_self<T: ~const Foo>(t: &T) -> bool {
| ^^^^^^ required by this bound in `equals_self` | ^^^^^^^^^^ required by this bound in `equals_self`
error: aborting due to 1 previous error error: aborting due to 1 previous error

4
tests/ui/traits/const-traits/const-drop-fail-2.precise.stderr
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@ -8,14 +8,14 @@ note: required for `ConstDropImplWithBounds<NonTrivialDrop>` to implement `const
--> $DIR/const-drop-fail-2.rs:25:25 --> $DIR/const-drop-fail-2.rs:25:25
| |
LL | impl<T: ~const A> const Drop for ConstDropImplWithBounds<T> { LL | impl<T: ~const A> const Drop for ConstDropImplWithBounds<T> {
| ------ ^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^ | -------- ^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^
| | | |
| unsatisfied trait bound introduced here | unsatisfied trait bound introduced here
note: required by a bound in `check` note: required by a bound in `check`
--> $DIR/const-drop-fail-2.rs:21:19 --> $DIR/const-drop-fail-2.rs:21:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error: aborting due to 1 previous error error: aborting due to 1 previous error

4
tests/ui/traits/const-traits/const-drop-fail-2.stock.stderr
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@ -8,14 +8,14 @@ note: required for `ConstDropImplWithBounds<NonTrivialDrop>` to implement `const
--> $DIR/const-drop-fail-2.rs:25:25 --> $DIR/const-drop-fail-2.rs:25:25
| |
LL | impl<T: ~const A> const Drop for ConstDropImplWithBounds<T> { LL | impl<T: ~const A> const Drop for ConstDropImplWithBounds<T> {
| ------ ^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^ | -------- ^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^
| | | |
| unsatisfied trait bound introduced here | unsatisfied trait bound introduced here
note: required by a bound in `check` note: required by a bound in `check`
--> $DIR/const-drop-fail-2.rs:21:19 --> $DIR/const-drop-fail-2.rs:21:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error: aborting due to 1 previous error error: aborting due to 1 previous error

4
tests/ui/traits/const-traits/const-drop-fail.new_precise.stderr
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@ -11,7 +11,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied
--> $DIR/const-drop-fail.rs:35:5 --> $DIR/const-drop-fail.rs:35:5
@ -26,7 +26,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error: aborting due to 2 previous errors error: aborting due to 2 previous errors

4
tests/ui/traits/const-traits/const-drop-fail.new_stock.stderr
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@ -11,7 +11,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied
--> $DIR/const-drop-fail.rs:35:5 --> $DIR/const-drop-fail.rs:35:5
@ -26,7 +26,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error: aborting due to 2 previous errors error: aborting due to 2 previous errors

4
tests/ui/traits/const-traits/const-drop-fail.old_precise.stderr
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@ -11,7 +11,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied
--> $DIR/const-drop-fail.rs:35:5 --> $DIR/const-drop-fail.rs:35:5
@ -26,7 +26,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error: aborting due to 2 previous errors error: aborting due to 2 previous errors

4
tests/ui/traits/const-traits/const-drop-fail.old_stock.stderr
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@ -11,7 +11,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied error[E0277]: the trait bound `NonTrivialDrop: const Destruct` is not satisfied
--> $DIR/const-drop-fail.rs:35:5 --> $DIR/const-drop-fail.rs:35:5
@ -26,7 +26,7 @@ note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:24:19 --> $DIR/const-drop-fail.rs:24:19
| |
LL | const fn check<T: ~const Destruct>(_: T) {} LL | const fn check<T: ~const Destruct>(_: T) {}
| ^^^^^^ required by this bound in `check` | ^^^^^^^^^^^^^^^ required by this bound in `check`
error: aborting due to 2 previous errors error: aborting due to 2 previous errors

2
tests/ui/traits/const-traits/const-opaque.no.stderr
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@ -10,7 +10,7 @@ note: required by a bound in `bar`
--> $DIR/const-opaque.rs:26:17 --> $DIR/const-opaque.rs:26:17
| |
LL | const fn bar<T: ~const Foo>(t: T) -> impl ~const Foo { LL | const fn bar<T: ~const Foo>(t: T) -> impl ~const Foo {
| ^^^^^^ required by this bound in `bar` | ^^^^^^^^^^ required by this bound in `bar`
error[E0277]: the trait bound `(): const Foo` is not satisfied error[E0277]: the trait bound `(): const Foo` is not satisfied
--> $DIR/const-opaque.rs:33:12 --> $DIR/const-opaque.rs:33:12

2
tests/ui/traits/const-traits/default-method-body-is-const-body-checking.stderr
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@ -8,7 +8,7 @@ note: required by a bound in `foo`
--> $DIR/default-method-body-is-const-body-checking.rs:7:28 --> $DIR/default-method-body-is-const-body-checking.rs:7:28
| |
LL | const fn foo<T>() where T: ~const Tr {} LL | const fn foo<T>() where T: ~const Tr {}
| ^^^^^^ required by this bound in `foo` | ^^^^^^^^^ required by this bound in `foo`
error: aborting due to 1 previous error error: aborting due to 1 previous error

6
tests/ui/traits/const-traits/item-bound-entailment-fails.stderr
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@ -8,7 +8,7 @@ note: required by a bound in `Foo::Assoc`
--> $DIR/item-bound-entailment-fails.rs:5:20 --> $DIR/item-bound-entailment-fails.rs:5:20
| |
LL | type Assoc<T>: ~const Bar LL | type Assoc<T>: ~const Bar
| ^^^^^^ required by this bound in `Foo::Assoc` | ^^^^^^^^^^ required by this bound in `Foo::Assoc`
error[E0277]: the trait bound `T: ~const Bar` is not satisfied error[E0277]: the trait bound `T: ~const Bar` is not satisfied
--> $DIR/item-bound-entailment-fails.rs:24:21 --> $DIR/item-bound-entailment-fails.rs:24:21
@ -20,12 +20,12 @@ note: required for `C<T>` to implement `~const Bar`
--> $DIR/item-bound-entailment-fails.rs:14:15 --> $DIR/item-bound-entailment-fails.rs:14:15
| |
LL | impl<T> const Bar for C<T> where T: ~const Bar {} LL | impl<T> const Bar for C<T> where T: ~const Bar {}
| ^^^ ^^^^ ------ unsatisfied trait bound introduced here | ^^^ ^^^^ ---------- unsatisfied trait bound introduced here
note: required by a bound in `Foo::Assoc` note: required by a bound in `Foo::Assoc`
--> $DIR/item-bound-entailment-fails.rs:5:20 --> $DIR/item-bound-entailment-fails.rs:5:20
| |
LL | type Assoc<T>: ~const Bar LL | type Assoc<T>: ~const Bar
| ^^^^^^ required by this bound in `Foo::Assoc` | ^^^^^^^^^^ required by this bound in `Foo::Assoc`
error: aborting due to 2 previous errors error: aborting due to 2 previous errors

2
tests/ui/traits/const-traits/minicore-fn-fail.stderr
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@ -10,7 +10,7 @@ note: required by a bound in `call_indirect`
--> $DIR/minicore-fn-fail.rs:11:27 --> $DIR/minicore-fn-fail.rs:11:27
| |
LL | const fn call_indirect<T: ~const Fn()>(t: &T) { t() } LL | const fn call_indirect<T: ~const Fn()>(t: &T) { t() }
| ^^^^^^ required by this bound in `call_indirect` | ^^^^^^^^^^^ required by this bound in `call_indirect`
error: aborting due to 1 previous error error: aborting due to 1 previous error

12
tests/ui/traits/const-traits/predicate-entailment-fails.stderr
View File

@ -5,7 +5,7 @@ LL | type Bar<T> where T: ~const Bar;
| ----------- definition of `Bar` from trait | ----------- definition of `Bar` from trait
... ...
LL | type Bar<T> = () where T: const Bar; LL | type Bar<T> = () where T: const Bar;
| ^^^^^ impl has extra requirement `T: const Bar` | ^^^^^^^^^ impl has extra requirement `T: const Bar`
error[E0276]: impl has stricter requirements than trait error[E0276]: impl has stricter requirements than trait
--> $DIR/predicate-entailment-fails.rs:17:26 --> $DIR/predicate-entailment-fails.rs:17:26
@ -14,7 +14,7 @@ LL | fn foo<T>() where T: ~const Bar;
| -------------------------------- definition of `foo` from trait | -------------------------------- definition of `foo` from trait
... ...
LL | fn foo<T>() where T: const Bar {} LL | fn foo<T>() where T: const Bar {}
| ^^^^^ impl has extra requirement `T: const Bar` | ^^^^^^^^^ impl has extra requirement `T: const Bar`
error[E0276]: impl has stricter requirements than trait error[E0276]: impl has stricter requirements than trait
--> $DIR/predicate-entailment-fails.rs:28:31 --> $DIR/predicate-entailment-fails.rs:28:31
@ -23,7 +23,7 @@ LL | type Bar<T> where T: Bar;
| ----------- definition of `Bar` from trait | ----------- definition of `Bar` from trait
... ...
LL | type Bar<T> = () where T: const Bar; LL | type Bar<T> = () where T: const Bar;
| ^^^^^ impl has extra requirement `T: const Bar` | ^^^^^^^^^ impl has extra requirement `T: const Bar`
error[E0276]: impl has stricter requirements than trait error[E0276]: impl has stricter requirements than trait
--> $DIR/predicate-entailment-fails.rs:31:26 --> $DIR/predicate-entailment-fails.rs:31:26
@ -32,7 +32,7 @@ LL | fn foo<T>() where T: Bar;
| ------------------------- definition of `foo` from trait | ------------------------- definition of `foo` from trait
... ...
LL | fn foo<T>() where T: const Bar {} LL | fn foo<T>() where T: const Bar {}
| ^^^^^ impl has extra requirement `T: const Bar` | ^^^^^^^^^ impl has extra requirement `T: const Bar`
error[E0276]: impl has stricter requirements than trait error[E0276]: impl has stricter requirements than trait
--> $DIR/predicate-entailment-fails.rs:35:31 --> $DIR/predicate-entailment-fails.rs:35:31
@ -41,7 +41,7 @@ LL | type Bar<T> where T: Bar;
| ----------- definition of `Bar` from trait | ----------- definition of `Bar` from trait
... ...
LL | type Bar<T> = () where T: ~const Bar; LL | type Bar<T> = () where T: ~const Bar;
| ^^^^^^ impl has extra requirement `T: ~const Bar` | ^^^^^^^^^^ impl has extra requirement `T: ~const Bar`
error[E0276]: impl has stricter requirements than trait error[E0276]: impl has stricter requirements than trait
--> $DIR/predicate-entailment-fails.rs:38:26 --> $DIR/predicate-entailment-fails.rs:38:26
@ -50,7 +50,7 @@ LL | fn foo<T>() where T: Bar;
| ------------------------- definition of `foo` from trait | ------------------------- definition of `foo` from trait
... ...
LL | fn foo<T>() where T: ~const Bar {} LL | fn foo<T>() where T: ~const Bar {}
| ^^^^^^ impl has extra requirement `T: ~const Bar` | ^^^^^^^^^^ impl has extra requirement `T: ~const Bar`
error: aborting due to 6 previous errors error: aborting due to 6 previous errors

4
tests/ui/traits/const-traits/trait-where-clause-const.stderr
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@ -8,7 +8,7 @@ note: required by a bound in `Foo::b`
--> $DIR/trait-where-clause-const.rs:15:24 --> $DIR/trait-where-clause-const.rs:15:24
| |
LL | fn b() where Self: ~const Bar; LL | fn b() where Self: ~const Bar;
| ^^^^^^ required by this bound in `Foo::b` | ^^^^^^^^^^ required by this bound in `Foo::b`
error[E0277]: the trait bound `T: ~const Bar` is not satisfied error[E0277]: the trait bound `T: ~const Bar` is not satisfied
--> $DIR/trait-where-clause-const.rs:23:12 --> $DIR/trait-where-clause-const.rs:23:12
@ -20,7 +20,7 @@ note: required by a bound in `Foo::c`
--> $DIR/trait-where-clause-const.rs:16:13 --> $DIR/trait-where-clause-const.rs:16:13
| |
LL | fn c<T: ~const Bar>(); LL | fn c<T: ~const Bar>();
| ^^^^^^ required by this bound in `Foo::c` | ^^^^^^^^^^ required by this bound in `Foo::c`
error: aborting due to 2 previous errors error: aborting due to 2 previous errors

2
tests/ui/traits/const-traits/unsatisfied-const-trait-bound.stderr
View File

@ -28,7 +28,7 @@ note: required by a bound in `require`
--> $DIR/unsatisfied-const-trait-bound.rs:8:15 --> $DIR/unsatisfied-const-trait-bound.rs:8:15
| |
LL | fn require<T: const Trait>() {} LL | fn require<T: const Trait>() {}
| ^^^^^ required by this bound in `require` | ^^^^^^^^^^^ required by this bound in `require`
error: aborting due to 4 previous errors error: aborting due to 4 previous errors