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Only point at impl self ty in WF if trait predicate shares self ty

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This commit is contained in:
Michael Goulet 2023-01-12 20:28:57 +00:00
parent 2aabb0fd5d
commit 5924c2511e
16 changed files with 45 additions and 38 deletions
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11
compiler/rustc_hir_analysis/src/check/wfcheck.rs
View File

@ -1267,14 +1267,21 @@ fn check_impl<'tcx>(
},
polarity: ty::ImplPolarity::Positive,
};
let obligations = traits::wf::trait_obligations(
let mut obligations = traits::wf::trait_obligations(
wfcx.infcx,
wfcx.param_env,
wfcx.body_id,
&trait_pred,
ast_self_ty.span,
ast_trait_ref.path.span,
item,
);
for obligation in &mut obligations {
if let Some(pred) = obligation.predicate.to_opt_poly_trait_pred()
&& pred.self_ty().skip_binder() == trait_ref.self_ty()
{
obligation.cause.span = ast_self_ty.span;
}
}
debug!(?obligations);
wfcx.register_obligations(obligations);
}

4
tests/ui/associated-types/hr-associated-type-bound-param-6.stderr
View File

@ -1,8 +1,8 @@
error[E0277]: the trait bound `for<'b> T: X<'b, T>` is not satisfied
--> $DIR/hr-associated-type-bound-param-6.rs:12:25
--> $DIR/hr-associated-type-bound-param-6.rs:12:12
|
LL | impl<S, T> X<'_, T> for (S,) {
| ^^^^ the trait `for<'b> X<'b, T>` is not implemented for `T`
| ^^^^^^^^ the trait `for<'b> X<'b, T>` is not implemented for `T`
|
help: consider restricting type parameter `T`
|

4
tests/ui/associated-types/hr-associated-type-projection-1.stderr
View File

@ -1,8 +1,8 @@
error[E0271]: type mismatch resolving `<T as Deref>::Target == T`
--> $DIR/hr-associated-type-projection-1.rs:13:55
--> $DIR/hr-associated-type-projection-1.rs:13:33
|
LL | impl<T: Copy + std::ops::Deref> UnsafeCopy<'_, T> for T {
| - this type parameter ^ expected type parameter `T`, found associated type
| - this type parameter ^^^^^^^^^^^^^^^^^ expected type parameter `T`, found associated type
|
= note: expected type parameter `T`
found associated type `<T as Deref>::Target`

4
tests/ui/builtin-superkinds/builtin-superkinds-self-type.stderr
View File

@ -1,8 +1,8 @@
error[E0310]: the parameter type `T` may not live long enough
--> $DIR/builtin-superkinds-self-type.rs:10:24
--> $DIR/builtin-superkinds-self-type.rs:10:16
|
LL | impl <T: Sync> Foo for T { }
| ^ ...so that the type `T` will meet its required lifetime bounds...
| ^^^ ...so that the type `T` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/builtin-superkinds-self-type.rs:6:24

8
tests/ui/const-generics/issues/issue-67185-2.stderr
View File

@ -23,10 +23,10 @@ LL | [<u8 as Baz>::Quaks; 2]: Bar,
= help: add `#![feature(trivial_bounds)]` to the crate attributes to enable
error[E0277]: the trait bound `[u16; 3]: Bar` is not satisfied
--> $DIR/issue-67185-2.rs:21:14
--> $DIR/issue-67185-2.rs:21:6
|
LL | impl Foo for FooImpl {}
| ^^^^^^^ the trait `Bar` is not implemented for `[u16; 3]`
| ^^^ the trait `Bar` is not implemented for `[u16; 3]`
|
= help: the following other types implement trait `Bar`:
[[u16; 3]; 3]
@ -41,10 +41,10 @@ LL | <u8 as Baz>::Quaks: Bar,
| ^^^ required by this bound in `Foo`
error[E0277]: the trait bound `[[u16; 3]; 2]: Bar` is not satisfied
--> $DIR/issue-67185-2.rs:21:14
--> $DIR/issue-67185-2.rs:21:6
|
LL | impl Foo for FooImpl {}
| ^^^^^^^ the trait `Bar` is not implemented for `[[u16; 3]; 2]`
| ^^^ the trait `Bar` is not implemented for `[[u16; 3]; 2]`
|
= help: the following other types implement trait `Bar`:
[[u16; 3]; 3]

4
tests/ui/dst/dst-sized-trait-param.stderr
View File

@ -1,8 +1,8 @@
error[E0277]: the size for values of type `[isize]` cannot be known at compilation time
--> $DIR/dst-sized-trait-param.rs:7:23
--> $DIR/dst-sized-trait-param.rs:7:6
|
LL | impl Foo<[isize]> for usize { }
| ^^^^^ doesn't have a size known at compile-time
| ^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `[isize]`
note: required by a bound in `Foo`

4
tests/ui/fn/implied-bounds-unnorm-associated-type-5.stderr
View File

@ -1,8 +1,8 @@
error[E0309]: the parameter type `T` may not live long enough
--> $DIR/implied-bounds-unnorm-associated-type-5.rs:6:27
--> $DIR/implied-bounds-unnorm-associated-type-5.rs:6:13
|
LL | impl<'a, T> Trait<'a> for T {
| ^ ...so that the type `T` will meet its required lifetime bounds...
| ^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/implied-bounds-unnorm-associated-type-5.rs:1:18

4
tests/ui/generics/issue-61631-default-type-param-can-reference-self-in-trait.stderr
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@ -1,8 +1,8 @@
error[E0277]: the size for values of type `[()]` cannot be known at compilation time
--> $DIR/issue-61631-default-type-param-can-reference-self-in-trait.rs:19:17
--> $DIR/issue-61631-default-type-param-can-reference-self-in-trait.rs:19:6
|
LL | impl Tsized for () {}
| ^^ doesn't have a size known at compile-time
| ^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `[()]`
note: required by a bound in `Tsized`

4
tests/ui/issues/issue-10412.stderr
View File

@ -53,10 +53,10 @@ LL | impl<'self> Serializable<'_, str> for &'self str {
| +++
error[E0277]: the size for values of type `str` cannot be known at compilation time
--> $DIR/issue-10412.rs:7:35
--> $DIR/issue-10412.rs:7:13
|
LL | impl<'self> Serializable<str> for &'self str {
| ^^^^^^^^^^ doesn't have a size known at compile-time
| ^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `str`
note: required by a bound in `Serializable`

8
tests/ui/overloaded/overloaded-calls-nontuple.stderr
View File

@ -1,17 +1,17 @@
error[E0059]: type parameter to bare `FnMut` trait must be a tuple
--> $DIR/overloaded-calls-nontuple.rs:10:23
--> $DIR/overloaded-calls-nontuple.rs:10:6
|
LL | impl FnMut<isize> for S {
| ^ the trait `Tuple` is not implemented for `isize`
| ^^^^^^^^^^^^ the trait `Tuple` is not implemented for `isize`
|
note: required by a bound in `FnMut`
--> $SRC_DIR/core/src/ops/function.rs:LL:COL
error[E0059]: type parameter to bare `FnOnce` trait must be a tuple
--> $DIR/overloaded-calls-nontuple.rs:18:24
--> $DIR/overloaded-calls-nontuple.rs:18:6
|
LL | impl FnOnce<isize> for S {
| ^ the trait `Tuple` is not implemented for `isize`
| ^^^^^^^^^^^^^ the trait `Tuple` is not implemented for `isize`
|
note: required by a bound in `FnOnce`
--> $SRC_DIR/core/src/ops/function.rs:LL:COL

4
tests/ui/specialization/defaultimpl/specialization-wfcheck.stderr
View File

@ -9,10 +9,10 @@ LL | #![feature(specialization)]
= note: `#[warn(incomplete_features)]` on by default
error[E0277]: the trait bound `U: Eq` is not satisfied
--> $DIR/specialization-wfcheck.rs:7:37
--> $DIR/specialization-wfcheck.rs:7:17
|
LL | default impl<U> Foo<'static, U> for () {}
| ^^ the trait `Eq` is not implemented for `U`
| ^^^^^^^^^^^^^^^ the trait `Eq` is not implemented for `U`
|
note: required by a bound in `Foo`
--> $DIR/specialization-wfcheck.rs:5:18

4
tests/ui/static/static-lifetime.stderr
View File

@ -1,8 +1,8 @@
error[E0478]: lifetime bound not satisfied
--> $DIR/static-lifetime.rs:3:34
--> $DIR/static-lifetime.rs:3:20
|
LL | impl<'a, A: Clone> Arbitrary for ::std::borrow::Cow<'a, A> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^^^
|
note: lifetime parameter instantiated with the lifetime `'a` as defined here
--> $DIR/static-lifetime.rs:3:6

8
tests/ui/trait-bounds/unsized-bound.stderr
View File

@ -223,10 +223,10 @@ LL | trait Trait6<A: ?Sized, B> {}
| ++++++++
error[E0277]: the size for values of type `Y` cannot be known at compilation time
--> $DIR/unsized-bound.rs:26:29
--> $DIR/unsized-bound.rs:26:12
|
LL | impl<X, Y> Trait7<X, Y> for X where Y: ?Sized {}
| - ^ doesn't have a size known at compile-time
| - ^^^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
|
@ -246,10 +246,10 @@ LL | trait Trait7<A, B: ?Sized> {}
| ++++++++
error[E0277]: the size for values of type `Y` cannot be known at compilation time
--> $DIR/unsized-bound.rs:29:37
--> $DIR/unsized-bound.rs:29:20
|
LL | impl<X, Y: ?Sized> Trait8<X, Y> for X {}
| - ^ doesn't have a size known at compile-time
| - ^^^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
|

4
tests/ui/traits/bound/on-structs-and-enums-in-impls.stderr
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@ -1,8 +1,8 @@
error[E0277]: the trait bound `u16: Trait` is not satisfied
--> $DIR/on-structs-and-enums-in-impls.rs:20:30
--> $DIR/on-structs-and-enums-in-impls.rs:20:6
|
LL | impl PolyTrait<Foo<u16>> for Struct {
| ^^^^^^ the trait `Trait` is not implemented for `u16`
| ^^^^^^^^^^^^^^^^^^^ the trait `Trait` is not implemented for `u16`
|
note: required by a bound in `Foo`
--> $DIR/on-structs-and-enums-in-impls.rs:3:14

4
tests/ui/unsized/unsized-trait-impl-trait-arg.stderr
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@ -1,8 +1,8 @@
error[E0277]: the size for values of type `X` cannot be known at compilation time
--> $DIR/unsized-trait-impl-trait-arg.rs:8:27
--> $DIR/unsized-trait-impl-trait-arg.rs:8:17
|
LL | impl<X: ?Sized> T2<X> for S4<X> {
| - ^^^^^ doesn't have a size known at compile-time
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
|

4
tests/ui/unsized/unsized7.stderr
View File

@ -1,8 +1,8 @@
error[E0277]: the size for values of type `X` cannot be known at compilation time
--> $DIR/unsized7.rs:12:31
--> $DIR/unsized7.rs:12:21
|
LL | impl<X: ?Sized + T> T1<X> for S3<X> {
| - ^^^^^ doesn't have a size known at compile-time
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
|