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diagnostics: do not suggest type name tweaks on type-inferred closure args #112325

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merged 1 commit into from
Jun 6, 2023
Merged

diagnostics: do not suggest type name tweaks on type-inferred closure args #112325

merged 1 commit into from
Jun 6, 2023

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notriddle
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Fixes #111932

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rustbot commented Jun 5, 2023

r? @eholk

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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 Jun 5, 2023
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rustbot commented Jun 5, 2023

Some changes occurred in src/tools/clippy

cc @rust-lang/clippy

compiler-errors
compiler-errors reviewed Jun 6, 2023
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Does this need to be such a heavy hammer? It really looks like we should just not be applying suggestions to closure arguments that have no type span -- that seemed to me to be the real issue with #111932.

We can still keep suggestions for closure args that do, like |x: dyn Trait| or whatever.

Or better yet, we apply them but make sure to apply them correctly...

compiler-errors
compiler-errors reviewed Jun 6, 2023
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compiler/rustc_hir_typeck/src/check.rs Outdated
fcx.require_type_is_sized(
param_ty,
param.pat.span,
traits::SizedArgumentType(ty_span.filter(|_| !tcx.is_closure(fn_def_id.into()))),
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Can you make this into an if like below? Easier to read that way IMO

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Does this need to be such a heavy hammer? It really looks like we should just not be applying suggestions to closure arguments that have no type span

It's complicated because hir::Param::ty_span isn't an Option, so it's not clear how to tell if a closure argument has a type ascription or not.

Would you rather HIR be changed to make ty_span an Option, and have it filled in as None when a closure argument doesn't have one?

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That's one way of doing it. If you don't want to do that much work though, you can check if the ty_span is equal to the binding's span, perhaps like how dc2977e does it...

@notriddle notriddle changed the title diagnostics: do not suggest type name tweaks on closure args diagnostics: do not suggest type name tweaks on type-inferred closure args Jun 6, 2023
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That makes sense. I've pushed a new commit that does that.

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r=me when green

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@notriddle notriddle force-pushed the notriddle/issue-111932 branch 2 times, most recently from 4379f7e to 8f06fbc Compare June 6, 2023 02:04
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@bors r=compiler-errors

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bors commented Jun 6, 2023

📌 Commit 467bc9f has been approved by compiler-errors

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 Jun 6, 2023
@matthiaskrgr matthiaskrgr mentioned this pull request Jun 6, 2023
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matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Jun 6, 2023
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Rollup merge of rust-lang#112325 - notriddle:notriddle/issue-111932, …
eaa940a 
…r=compiler-errors

diagnostics: do not suggest type name tweaks on type-inferred closure args

Fixes rust-lang#111932
@matthiaskrgr matthiaskrgr mentioned this pull request Jun 6, 2023
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bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 6, 2023
@bors
Auto merge of rust-lang#112344 - matthiaskrgr:rollup-tswr83e, r=matth…
b2b34bd 
…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#111058 (Correct fortanix LVI test print function)
 - rust-lang#111369 (Added custom risc32-imac for esp-espidf target)
 - rust-lang#111962 (Make GDB Python Pretty Printers loadable after spawning GDB, avoiding required `rust-gdb`)
 - rust-lang#112019 (Don't suggest changing `&self` and `&mut self` in function signature to be mutable when taking `&mut self` in closure)
 - rust-lang#112199 (Fix suggestion for matching struct with `..` on both ends)
 - rust-lang#112220 (Cleanup some `EarlyBinder::skip_binder()` -> `EarlyBinder::subst_identity()`)
 - rust-lang#112325 (diagnostics: do not suggest type name tweaks on type-inferred closure args)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 38c92cc into rust-lang:master Jun 6, 2023
@rustbot rustbot added this to the 1.72.0 milestone Jun 6, 2023
@notriddle notriddle deleted the notriddle/issue-111932 branch June 6, 2023 21:48
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@compiler-errors compiler-errors compiler-errors approved these changes

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E0277 shows invalid help in closures
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