Commit Graph

14 Commits

Author SHA1 Message Date
Matthias Krüger 6cb627b681
Rollup merge of #117505 - estebank:issue-117501, r=TaKO8Ki
Fix incorrect trait bound restriction suggestion

Suggest

```
error[E0308]: mismatched types
  --> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
   |
LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
   |                        -           - expected `B` because of return type
   |                        |
   |                        expected this type parameter
LL |     return a.bar();
   |            ^^^^^^^ expected type parameter `B`, found associated type
   |
   = note: expected type parameter `B`
             found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
   |
LL | pub fn foo<A: MyTrait<T = B>, B>(a: A) -> B {
   |                      +++++++
```

instead of

```
error[E0308]: mismatched types
  --> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
   |
LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
   |                        -           - expected `B` because of return type
   |                        |
   |                        expected this type parameter
LL |     return a.bar();
   |            ^^^^^^^ expected type parameter `B`, found associated type
   |
   = note: expected type parameter `B`
             found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
   |
LL | pub fn foo<A: MyTrait + <T = B>, B>(a: A) -> B {
   |                      +++++++++
```

Fix #117501.
2023-11-03 12:44:50 +01:00
Michael Goulet c83f642f12 Pretty print Fn traits in rustc_on_unimplemented 2023-11-02 20:57:05 +00:00
Esteban Küber 9e7345be1f Fix incorrect trait bound restriction suggestion
Suggest

```
error[E0308]: mismatched types
  --> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
   |
LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
   |                        -           - expected `B` because of return type
   |                        |
   |                        expected this type parameter
LL |     return a.bar();
   |            ^^^^^^^ expected type parameter `B`, found associated type
   |
   = note: expected type parameter `B`
             found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
   |
LL | pub fn foo<A: MyTrait<T = B>, B>(a: A) -> B {
   |                      +++++++
```

instead of

```
error[E0308]: mismatched types
  --> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
   |
LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
   |                        -           - expected `B` because of return type
   |                        |
   |                        expected this type parameter
LL |     return a.bar();
   |            ^^^^^^^ expected type parameter `B`, found associated type
   |
   = note: expected type parameter `B`
             found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
   |
LL | pub fn foo<A: MyTrait + <T = B>, B>(a: A) -> B {
   |                      +++++++++
```

Fix #117501.
2023-11-02 18:04:41 +00:00
Michael Goulet 592163fb71 Extend impl's def_span to include where clauses 2023-10-09 11:47:02 +00:00
Michael Goulet 30e6cea0ae Point out if a local trait has no implementations 2023-09-10 21:20:36 +00:00
Michael Howell 31e5dd3a79 diagnostics: add test case for trait bounds diagnostic
Closes #82038

It was fixed by b8e5ab20ed, a wide-reaching
obligation tracking improvement. This commit adds a test case.
2023-09-07 11:36:23 -07:00
Michael Goulet 055452864e Walk through full path in point_at_path_if_possible 2023-08-25 19:05:38 +00:00
Lukas Markeffsky b6a3f126c0 change `std::marker::Sized` to just `Sized` 2023-06-15 12:01:38 +02:00
Lukas Markeffsky ee7e717322 tweak suggestion for argument-position `impl ?Sized` 2023-06-15 12:00:57 +02:00
Esteban Küber 9fadcc143a Special-case item attributes in the suggestion output 2023-04-12 22:50:10 +00:00
Esteban Küber 5b40aa5eb4 Tweak output for 'add line' suggestion 2023-04-12 22:50:10 +00:00
Michael Goulet 5924c2511e Only point at impl self ty in WF if trait predicate shares self ty 2023-01-12 22:25:30 +00:00
Michael Goulet 2aabb0fd5d Point at impl self type for impl wf obligations 2023-01-12 20:44:47 +00:00
Albert Larsan cf2dff2b1e
Move /src/test to /tests 2023-01-11 09:32:08 +00:00