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Better names for illegal impl trait positions #108066

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compiler-errors
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Just some wording tweaks, no behavior changes.

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rustbot commented Feb 14, 2023

r? @petrochenkov

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Feb 14, 2023
@compiler-errors compiler-errors changed the title Better label for illegal impl trait types Better names for illegal impl trait positions Feb 15, 2023
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@bors r+

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bors commented Feb 15, 2023

📌 Commit 3f80017 has been approved by petrochenkov

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 15, 2023
bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 16, 2023
…iaskrgr

Rollup of 10 pull requests

Successful merges:

 - rust-lang#107034 (Migrating rustc_infer to session diagnostics (part 4))
 - rust-lang#107972 (Fix unintentional UB in ui tests)
 - rust-lang#108010 (Make `InferCtxt::can_eq` and `InferCtxt::can_sub` return booleans)
 - rust-lang#108021 (make x look for x.py if shell script does not exist)
 - rust-lang#108047 (Use `target` instead of `machine` for mir interpreter integer handling.)
 - rust-lang#108049 (Don't suggest `#[doc(hidden)]` trait methods with matching return type)
 - rust-lang#108066 (Better names for illegal impl trait positions)
 - rust-lang#108076 (rustdoc: Use more let chain)
 - rust-lang#108088 (clarify correctness of `black_box`)
 - rust-lang#108094 (Demonstrate I/O in File examples)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 8259755 into rust-lang:master Feb 16, 2023
@rustbot rustbot added this to the 1.69.0 milestone Feb 16, 2023
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Feb 23, 2023
…unds-in-bad-position, r=cjgillot

Ban associated type bounds in bad positions

We should not try to lower associated type bounds into TAITs in positions where `impl Trait` is not allowed (except for in `where` clauses, like `where T: Trait<Assoc: Bound>`).

This is achieved by using the same `rustc_ast_lowering` machinery as impl-trait does to characterize positions as universal/existential/disallowed.

Fixes rust-lang#106077

Split out the first commit into rust-lang#108066, since it's not really related.
@compiler-errors compiler-errors deleted the better-labels-for-bad-impl-trait branch August 11, 2023 19:56
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4 participants