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14663e09b7
rust/compiler/rustc_hir_analysis
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Matthias Krüger 14663e09b7
Rollup merge of #116257 - estebank:issue-101351, r=b-naber 
Suggest trait bounds for used associated type on type param

Fix #101351.

When an associated type on a type parameter is used, and the type parameter isn't constrained by the correct trait, suggest the appropriate trait bound:

```
error[E0220]: associated type `Associated` not found for `T`
 --> file.rs:6:15
  |
6 |     field: T::Associated,
  |               ^^^^^^^^^^ there is a similarly named associated type `Associated` in the trait `Foo`
  |
help: consider restricting type parameter `T`
  |
5 | struct Generic<T: Foo> {
  |                 +++++
  ```

When an associated type on a type parameter has a typo, suggest fixing
it:

```
error[E0220]: associated type `Baa` not found for `T`
  --> $DIR/issue-55673.rs:9:8
   |
LL |     T::Baa: std::fmt::Debug,
   |        ^^^ there is a similarly named associated type `Bar` in the trait `Foo`
   |
help: change the associated type name to use `Bar` from `Foo`
   |
LL |     T::Bar: std::fmt::Debug,
   |        ~~~
```
2023-10-16 19:10:49 +02:00
..
src Rollup merge of #116257 - estebank:issue-101351, r=b-naber 2023-10-16 19:10:49 +02:00
Cargo.toml drop unused deps, gate libc under unix for one crate 2023-04-22 15:22:21 +03:00
messages.ftl Rollup merge of #115863 - chenyukang:yukang-add-message-tidy-check, r=davidtwco 2023-10-03 12:24:11 +02:00
README.md rustc_typeck to rustc_hir_analysis 2022-09-27 10:37:23 +02:00

README.md

For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.