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show suggestion to replace generic bounds with associated types in more cases

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This commit is contained in:
Robin Appelman 2022-03-27 20:45:08 +02:00
parent 878c7833f6
commit decc04dbfb
6 changed files with 82 additions and 24 deletions
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2
src/test/ui/const-generics/issues/issue-87493.stderr
View file

@ -13,7 +13,7 @@ error[E0107]: this trait takes 0 generic arguments but 1 generic argument was su
--> $DIR/issue-87493.rs:8:8
|
LL | T: MyTrait<Assoc == S::Assoc>,
| ^^^^^^^------------------- help: remove these generics
| ^^^^^^^ ----------------- help: replace the generic bound with the associated type: `Assoc = Assoc == S::Assoc`
| |
| expected 0 generic arguments
|

10
src/test/ui/error-codes/E0107.rs
View file

@ -47,4 +47,14 @@ struct Baz<'a, 'b, 'c> {
//~| HELP remove this lifetime argument
}
pub trait T {
type A;
type B;
}
fn trait_bound_generic<I: T<u8, u16>>(_i: I) {
//~^ ERROR this trait takes 0 generic arguments
//~| HELP replace the generic bounds with the associated types
}
fn main() {}

18
src/test/ui/error-codes/E0107.stderr
View file

@ -128,6 +128,22 @@ note: struct defined here, with 0 lifetime parameters
LL | struct Quux<T>(T);
| ^^^^
error: aborting due to 9 previous errors
error[E0107]: this trait takes 0 generic arguments but 2 generic arguments were supplied
--> $DIR/E0107.rs:55:27
|
LL | fn trait_bound_generic<I: T<u8, u16>>(_i: I) {
| ^ expected 0 generic arguments
|
note: trait defined here, with 0 generic parameters
--> $DIR/E0107.rs:50:11
|
LL | pub trait T {
| ^
help: replace the generic bounds with the associated types
|
LL | fn trait_bound_generic<I: T<A = u8, B = u16>>(_i: I) {
| ~~~~~~ ~~~~~~~
error: aborting due to 10 previous errors
For more information about this error, try `rustc --explain E0107`.

13
src/test/ui/suggestions/use-type-argument-instead-of-assoc-type.stderr
View file

@ -2,15 +2,17 @@ error[E0107]: this trait takes 2 generic arguments but 4 generic arguments were
--> $DIR/use-type-argument-instead-of-assoc-type.rs:7:16
|
LL | i: Box<dyn T<usize, usize, usize, usize, B=usize>>,
| ^ ------------ help: remove these generic arguments
| |
| expected 2 generic arguments
| ^ expected 2 generic arguments
|
note: trait defined here, with 2 generic parameters: `X`, `Y`
--> $DIR/use-type-argument-instead-of-assoc-type.rs:1:11
|
LL | pub trait T<X, Y> {
| ^ - -
help: replace the generic bounds with the associated types
|
LL | i: Box<dyn T<usize, usize, A = usize, C = usize, B=usize>>,
| ~~~~~~~~~ ~~~~~~~~~
error[E0191]: the value of the associated types `A` (from trait `T`), `C` (from trait `T`) must be specified
--> $DIR/use-type-argument-instead-of-assoc-type.rs:7:16
@ -23,11 +25,6 @@ LL | type C;
...
LL | i: Box<dyn T<usize, usize, usize, usize, B=usize>>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ associated types `A`, `C` must be specified
|
help: specify the associated types
|
LL | i: Box<dyn T<usize, usize, A = usize, C = usize, B=usize>>,
| ~~~~~~~~~ ~~~~~~~~~
error: aborting due to 2 previous errors