Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Suggest trait bounds for used associated type on type param #116257

Merged
merged 2 commits into from
Oct 16, 2023

Commits on Oct 13, 2023

  1. Suggest trait bounds for used associated type on type param

    Fix rust-lang#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,
       |        ~~~
    ```
    estebank committed Oct 13, 2023
    Configuration menu
    Copy the full SHA
    781e864 View commit details
    Browse the repository at this point in the history
  2. Tweak wording

    estebank committed Oct 13, 2023
    Configuration menu
    Copy the full SHA
    20c622e View commit details
    Browse the repository at this point in the history