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Fix associated item removal suggestion 

We were previously telling people to write what was already there, instead of removal.

```
error[E0229]: associated item constraints are not allowed here
  --> $DIR/E0229.rs:13:25
   |
LL | fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
   |                         ^^^^^^^ associated item constraint not allowed here
   |
help: consider removing this associated item binding
   |
LL - fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
LL + fn baz<I>(x: &<I as Foo>::A) {}
   |
```
This commit is contained in:
Esteban Küber 2024-07-09 22:11:20 +00:00
parent 032be6f7bb
commit e38032fb3a
13 changed files with 101 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs
View File

@ -1257,14 +1257,12 @@ pub fn prohibit_assoc_item_constraint(
};
// Now emit the suggestion
if let Ok(suggestion) = tcx.sess.source_map().span_to_snippet(removal_span) {
e.span_suggestion_verbose(
removal_span,
format!("consider removing this associated item {}", constraint.kind.descr()),
suggestion,
"",
Applicability::MaybeIncorrect,
);
}
};
// Suggest replacing the associated item binding with a generic argument.

11
tests/rustdoc-ui/ice-unresolved-import-100241.stderr Normal file
View File

@ -0,0 +1,11 @@
error[E0432]: unresolved import `inner`
--> $DIR/ice-unresolved-import-100241.rs:9:13
|
LL | pub use inner::S;
| ^^^^^ maybe a missing crate `inner`?
|
= help: consider adding `extern crate inner` to use the `inner` crate
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0432`.

10
tests/rustdoc-ui/invalid_associated_const.stderr
View File

@ -6,8 +6,9 @@ LL | type A: S<C<X = 0i32> = 34>;
|
help: consider removing this associated item binding
|
LL | type A: S<C<X = 0i32> = 34>;
| ~~~~~~~~~~
LL - type A: S<C<X = 0i32> = 34>;
LL + type A: S<C = 34>;
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/invalid_associated_const.rs:4:17
@ -18,8 +19,9 @@ LL | type A: S<C<X = 0i32> = 34>;
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | type A: S<C<X = 0i32> = 34>;
| ~~~~~~~~~~
LL - type A: S<C<X = 0i32> = 34>;
LL + type A: S<C = 34>;
|
error: aborting due to 2 previous errors

10
tests/rustdoc-ui/issue-102467.stderr
View File

@ -6,8 +6,9 @@ LL | type A: S<C<X = 0i32> = 34>;
|
help: consider removing this associated item binding
|
LL | type A: S<C<X = 0i32> = 34>;
| ~~~~~~~~~~
LL - type A: S<C<X = 0i32> = 34>;
LL + type A: S<C = 34>;
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/issue-102467.rs:7:17
@ -18,8 +19,9 @@ LL | type A: S<C<X = 0i32> = 34>;
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | type A: S<C<X = 0i32> = 34>;
| ~~~~~~~~~~
LL - type A: S<C<X = 0i32> = 34>;
LL + type A: S<C = 34>;
|
error: aborting due to 2 previous errors

10
tests/ui/associated-consts/issue-102335-const.stderr
View File

@ -6,8 +6,9 @@ LL | type A: S<C<X = 0i32> = 34>;
|
help: consider removing this associated item binding
|
LL | type A: S<C<X = 0i32> = 34>;
| ~~~~~~~~~~
LL - type A: S<C<X = 0i32> = 34>;
LL + type A: S<C = 34>;
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/issue-102335-const.rs:4:17
@ -18,8 +19,9 @@ LL | type A: S<C<X = 0i32> = 34>;
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | type A: S<C<X = 0i32> = 34>;
| ~~~~~~~~~~
LL - type A: S<C<X = 0i32> = 34>;
LL + type A: S<C = 34>;
|
error: aborting due to 2 previous errors

20
tests/ui/associated-type-bounds/issue-102335-ty.stderr
View File

@ -6,8 +6,9 @@ LL | type A: S<C<i32 = u32> = ()>; // Just one erroneous equality constraint
|
help: consider removing this associated item binding
|
LL | type A: S<C<i32 = u32> = ()>; // Just one erroneous equality constraint
| ~~~~~~~~~~~
LL - type A: S<C<i32 = u32> = ()>; // Just one erroneous equality constraint
LL + type A: S<C = ()>; // Just one erroneous equality constraint
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/issue-102335-ty.rs:2:17
@ -18,8 +19,9 @@ LL | type A: S<C<i32 = u32> = ()>; // Just one erroneous equality constraint
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | type A: S<C<i32 = u32> = ()>; // Just one erroneous equality constraint
| ~~~~~~~~~~~
LL - type A: S<C<i32 = u32> = ()>; // Just one erroneous equality constraint
LL + type A: S<C = ()>; // Just one erroneous equality constraint
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/issue-102335-ty.rs:8:17
@ -29,8 +31,9 @@ LL | type A: S<C<i32 = u32, X = i32> = ()>; // More than one erroneous equal
|
help: consider removing this associated item binding
|
LL | type A: S<C<i32 = u32, X = i32> = ()>; // More than one erroneous equality constraints
| ~~~~~~~~~~
LL - type A: S<C<i32 = u32, X = i32> = ()>; // More than one erroneous equality constraints
LL + type A: S<C<X = i32> = ()>; // More than one erroneous equality constraints
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/issue-102335-ty.rs:8:17
@ -41,8 +44,9 @@ LL | type A: S<C<i32 = u32, X = i32> = ()>; // More than one erroneous equal
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | type A: S<C<i32 = u32, X = i32> = ()>; // More than one erroneous equality constraints
| ~~~~~~~~~~
LL - type A: S<C<i32 = u32, X = i32> = ()>; // More than one erroneous equality constraints
LL + type A: S<C<X = i32> = ()>; // More than one erroneous equality constraints
|
error: aborting due to 4 previous errors

5
tests/ui/associated-type-bounds/no-gat-position.stderr
View File

@ -6,8 +6,9 @@ LL | fn next<'a>(&'a mut self) -> Option<Self::Item<'a, As1: Copy>>;
|
help: consider removing this associated item constraint
|
LL | fn next<'a>(&'a mut self) -> Option<Self::Item<'a, As1: Copy>>;
| ~~~~~~~~~~~
LL - fn next<'a>(&'a mut self) -> Option<Self::Item<'a, As1: Copy>>;
LL + fn next<'a>(&'a mut self) -> Option<Self::Item<'a>>;
|
error: aborting due to 1 previous error

40
tests/ui/associated-types/associated-types-eq-2.stderr
View File

@ -50,8 +50,9 @@ LL | impl Tr1<A = usize> for usize {
|
help: consider removing this associated item binding
|
LL | impl Tr1<A = usize> for usize {
| ~~~~~~~~~~~
LL - impl Tr1<A = usize> for usize {
LL + impl Tr1 for usize {
|
error[E0046]: not all trait items implemented, missing: `A`
--> $DIR/associated-types-eq-2.rs:20:1
@ -70,8 +71,9 @@ LL | fn baz<I: Tr1>(_x: &<I as Tr1<A=Bar>>::A) {}
|
help: consider removing this associated item binding
|
LL | fn baz<I: Tr1>(_x: &<I as Tr1<A=Bar>>::A) {}
| ~~~~~~~
LL - fn baz<I: Tr1>(_x: &<I as Tr1<A=Bar>>::A) {}
LL + fn baz<I: Tr1>(_x: &<I as Tr1>::A) {}
|
error[E0107]: trait takes 3 generic arguments but 1 generic argument was supplied
--> $DIR/associated-types-eq-2.rs:40:6
@ -128,8 +130,9 @@ LL | impl Tr2<i32, t2 = Qux, T3 = usize> for Qux {
|
help: consider removing this associated item binding
|
LL | impl Tr2<i32, t2 = Qux, T3 = usize> for Qux {
| ~~~~~~~~~~
LL - impl Tr2<i32, t2 = Qux, T3 = usize> for Qux {
LL + impl Tr2<i32, T3 = usize> for Qux {
|
error[E0107]: trait takes 3 generic arguments but 1 generic argument was supplied
--> $DIR/associated-types-eq-2.rs:54:6
@ -157,8 +160,9 @@ LL | impl Tr2<i32, X = Qux, Y = usize> for Bar {
|
help: consider removing this associated item binding
|
LL | impl Tr2<i32, X = Qux, Y = usize> for Bar {
| ~~~~~~~~~
LL - impl Tr2<i32, X = Qux, Y = usize> for Bar {
LL + impl Tr2<i32, Y = usize> for Bar {
|
error[E0107]: trait takes 3 generic arguments but 2 generic arguments were supplied
--> $DIR/associated-types-eq-2.rs:61:6
@ -228,8 +232,9 @@ LL | impl Tr3<n = 42, T2 = Qux, T3 = usize> for Qux {
|
help: consider removing this associated item binding
|
LL | impl Tr3<n = 42, T2 = Qux, T3 = usize> for Qux {
| ~~~~~~~
LL - impl Tr3<n = 42, T2 = Qux, T3 = usize> for Qux {
LL + impl Tr3<T2 = Qux, T3 = usize> for Qux {
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/associated-types-eq-2.rs:92:10
@ -239,8 +244,9 @@ LL | impl Tr3<N = u32, T2 = Qux, T3 = usize> for Bar {
|
help: consider removing this associated item binding
|
LL | impl Tr3<N = u32, T2 = Qux, T3 = usize> for Bar {
| ~~~~~~~~
LL - impl Tr3<N = u32, T2 = Qux, T3 = usize> for Bar {
LL + impl Tr3<T2 = Qux, T3 = usize> for Bar {
|
error[E0107]: trait takes 3 generic arguments but 1 generic argument was supplied
--> $DIR/associated-types-eq-2.rs:98:6
@ -268,8 +274,9 @@ LL | impl Tr3<42, T2 = 42, T3 = usize> for Bar {
|
help: consider removing this associated item binding
|
LL | impl Tr3<42, T2 = 42, T3 = usize> for Bar {
| ~~~~~~~~~
LL - impl Tr3<42, T2 = 42, T3 = usize> for Bar {
LL + impl Tr3<42, T3 = usize> for Bar {
|
error[E0107]: trait takes 3 generic arguments but 0 generic arguments were supplied
--> $DIR/associated-types-eq-2.rs:106:6
@ -295,8 +302,9 @@ LL | impl Tr3<X = 42, Y = Qux, Z = usize> for Bar {
|
help: consider removing this associated item binding
|
LL | impl Tr3<X = 42, Y = Qux, Z = usize> for Bar {
| ~~~~~~~
LL - impl Tr3<X = 42, Y = Qux, Z = usize> for Bar {
LL + impl Tr3<Y = Qux, Z = usize> for Bar {
|
error[E0107]: struct takes 1 generic argument but 0 generic arguments were supplied
--> $DIR/associated-types-eq-2.rs:117:13

5
tests/ui/async-await/return-type-notation/rtn-in-impl-signature.stderr
View File

@ -15,8 +15,9 @@ LL | impl Super1<'_, bar(..): Send> for () {}
|
help: consider removing this associated item constraint
|
LL | impl Super1<'_, bar(..): Send> for () {}
| ~~~~~~~~~~~~~~~
LL - impl Super1<'_, bar(..): Send> for () {}
LL + impl Super1<'_> for () {}
|
error[E0046]: not all trait items implemented, missing: `bar`
--> $DIR/rtn-in-impl-signature.rs:10:1

15
tests/ui/error-codes/E0229.stderr
View File

@ -6,8 +6,9 @@ LL | fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
|
help: consider removing this associated item binding
|
LL | fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
| ~~~~~~~~~
LL - fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
LL + fn baz<I>(x: &<I as Foo>::A) {}
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/E0229.rs:13:25
@ -18,8 +19,9 @@ LL | fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
| ~~~~~~~~~
LL - fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
LL + fn baz<I>(x: &<I as Foo>::A) {}
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/E0229.rs:13:25
@ -30,8 +32,9 @@ LL | fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
| ~~~~~~~~~
LL - fn baz<I>(x: &<I as Foo<A = Bar>>::A) {}
LL + fn baz<I>(x: &<I as Foo>::A) {}
|
error[E0277]: the trait bound `I: Foo` is not satisfied
--> $DIR/E0229.rs:13:15

10
tests/ui/generic-associated-types/issue-102335-gat.stderr
View File

@ -6,8 +6,9 @@ LL | type A: S<C<(), i32 = ()> = ()>;
|
help: consider removing this associated item binding
|
LL | type A: S<C<(), i32 = ()> = ()>;
| ~~~~~~~~~~
LL - type A: S<C<(), i32 = ()> = ()>;
LL + type A: S<C<()> = ()>;
|
error[E0229]: associated item constraints are not allowed here
--> $DIR/issue-102335-gat.rs:2:21
@ -18,8 +19,9 @@ LL | type A: S<C<(), i32 = ()> = ()>;
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | type A: S<C<(), i32 = ()> = ()>;
| ~~~~~~~~~~
LL - type A: S<C<(), i32 = ()> = ()>;
LL + type A: S<C<()> = ()>;
|
error: aborting due to 2 previous errors

5
tests/ui/lifetimes/issue-83753-invalid-associated-type-supertrait-hrtb.stderr
View File

@ -6,8 +6,9 @@ LL | fn bar(foo: Foo<Target = usize>) {}
|
help: consider removing this associated item binding
|
LL | fn bar(foo: Foo<Target = usize>) {}
| ~~~~~~~~~~~~~~~~
LL - fn bar(foo: Foo<Target = usize>) {}
LL + fn bar(foo: Foo) {}
|
error: aborting due to 1 previous error

10
tests/ui/suggestions/issue-85347.stderr
View File

@ -22,8 +22,9 @@ LL | type Bar<'a>: Deref<Target = <Self>::Bar<Target = Self>>;
|
help: consider removing this associated item binding
|
LL | type Bar<'a>: Deref<Target = <Self>::Bar<Target = Self>>;
| ~~~~~~~~~~~~~~~
LL - type Bar<'a>: Deref<Target = <Self>::Bar<Target = Self>>;
LL + type Bar<'a>: Deref<Target = <Self>::Bar>;
|
error[E0107]: associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
--> $DIR/issue-85347.rs:3:42
@ -51,8 +52,9 @@ LL | type Bar<'a>: Deref<Target = <Self>::Bar<Target = Self>>;
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider removing this associated item binding
|
LL | type Bar<'a>: Deref<Target = <Self>::Bar<Target = Self>>;
| ~~~~~~~~~~~~~~~
LL - type Bar<'a>: Deref<Target = <Self>::Bar<Target = Self>>;
LL + type Bar<'a>: Deref<Target = <Self>::Bar>;
|
error: aborting due to 4 previous errors