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Cleanup some EarlyBinder::skip_binder() -> EarlyBinder::subst_identity() #112220

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Merged
merged 1 commit into from
Jun 6, 2023
Merged

Cleanup some EarlyBinder::skip_binder() -> EarlyBinder::subst_identity() #112220

merged 1 commit into from
Jun 6, 2023

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kylematsuda
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fix some incorrect skip_binder()'s as identified in #112006 (review)

r? @compiler-errors @lcnr @jackh726

(hope it's alright to just tag everyone who commented 😅)

@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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. labels Jun 2, 2023
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rustbot commented Jun 2, 2023

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

kylematsuda
kylematsuda commented Jun 2, 2023
View reviewed changes
src/librustdoc/clean/blanket_impl.rs
@@ -104,7 +104,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
// the post-inference `trait_ref`, as it's more accurate.
trait_: Some(clean_trait_ref_with_bindings(
cx,
ty::Binder::dummy(trait_ref.skip_binder()),
ty::Binder::dummy(trait_ref.subst_identity()),
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There are some skip_binder lower down in this function too. Should those be subst_identity as well?

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Yeah I believe so

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thanks, just updated the commit to add those 👍

compiler/rustc_mir_transform/src/shim.rs
@@ -647,7 +647,7 @@ fn build_call_shim<'tcx>(
let mut sig = if let Some(sig_substs) = sig_substs {
sig.subst(tcx, &sig_substs)
} else {
sig.skip_binder()
sig.subst_identity()
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I remember a similar pattern in Instance::subst_mir that I used skip_binder for previously:

rust/compiler/rustc_middle/src/ty/instance.rs

Lines 581 to 591 in a9baa16

pub fn subst_mir<T>(&self, tcx: TyCtxt<'tcx>, v: EarlyBinder<&T>) -> T
where
T: TypeFoldable<TyCtxt<'tcx>> + Copy,
{
let v = v.map_bound(|v| *v);
if let Some(substs) = self.substs_for_mir_body() {
v.subst(tcx, substs)
} else {
v.skip_binder()
}
}

Should that one also be subst_identity()?

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Yes, probably

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@rustbot rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 5, 2023
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@bors r+ rollup

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bors commented Jun 6, 2023

📌 Commit 57cbe25 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-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jun 6, 2023
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Jun 6, 2023
@matthiaskrgr
Rollup merge of rust-lang#112220 - kylematsuda:earlybinder-fix, r=com…
0d24c6a 
…piler-errors

Cleanup some `EarlyBinder::skip_binder()` -> `EarlyBinder::subst_identity()`

fix some incorrect `skip_binder()`'s as identified in rust-lang#112006 (review)

r? `@compiler-errors` `@lcnr` `@jackh726`

(hope it's alright to just tag everyone who commented 😅)
@matthiaskrgr matthiaskrgr mentioned this pull request Jun 6, 2023
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@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 7c76f3b into rust-lang:master Jun 6, 2023
@rustbot rustbot added this to the 1.72.0 milestone Jun 6, 2023
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