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match lowering cleanup: remove unused unsizing logic from non_scalar_compare #138821

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merged 1 commit into from
Mar 24, 2025

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dianne
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@dianne dianne commented Mar 22, 2025

Since array and slice constants are now translated to array and slice patterns, non_scalar_compare is only used for string comparisons. This specializes it to strings, renames it, and removes the unused array-unsizing logic.

This also updates the doc comments for thir::PatKind::Constant and TestKind::Eq, which referred to them being used for slice references.

r? @oli-obk

Since array and slice constants are now lowered to array and slice
patterns, `non_scalar_compare` was only called for string comparisons.
This specializes it to strings, renames it, and removes the unused
array-unsizing logic.

This also updates some outdated doc comments.
@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 Mar 22, 2025
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rustbot commented Mar 22, 2025

Some changes occurred in match lowering

cc @Nadrieril

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oli-obk commented Mar 24, 2025

Nice find!

@bors r+ rollup

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bors commented Mar 24, 2025

📌 Commit 83145a6 has been approved by oli-obk

It is now in the queue for this repository.

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bors commented Mar 24, 2025

🌲 The tree is currently closed for pull requests below priority 100. This pull request will be tested once the tree is reopened.

@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 Mar 24, 2025
TaKO8Ki added a commit to TaKO8Ki/rust that referenced this pull request Mar 24, 2025
… r=oli-obk

match lowering cleanup: remove unused unsizing logic from `non_scalar_compare`

Since array and slice constants are now translated to array and slice patterns, `non_scalar_compare` is only used for string comparisons. This specializes it to strings, renames it, and removes the unused array-unsizing logic.

This also updates the doc comments for  `thir::PatKind::Constant` and `TestKind::Eq`, which referred to them being used for slice references.

r? `@oli-obk`
TaKO8Ki added a commit to TaKO8Ki/rust that referenced this pull request Mar 24, 2025
… r=oli-obk

match lowering cleanup: remove unused unsizing logic from `non_scalar_compare`

Since array and slice constants are now translated to array and slice patterns, `non_scalar_compare` is only used for string comparisons. This specializes it to strings, renames it, and removes the unused array-unsizing logic.

This also updates the doc comments for  `thir::PatKind::Constant` and `TestKind::Eq`, which referred to them being used for slice references.

r? ``@oli-obk``
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Mar 24, 2025
… r=oli-obk

match lowering cleanup: remove unused unsizing logic from `non_scalar_compare`

Since array and slice constants are now translated to array and slice patterns, `non_scalar_compare` is only used for string comparisons. This specializes it to strings, renames it, and removes the unused array-unsizing logic.

This also updates the doc comments for  `thir::PatKind::Constant` and `TestKind::Eq`, which referred to them being used for slice references.

r? ```@oli-obk```
bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 24, 2025
…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#138601 (add FCW to warn about wasm ABI transition)
 - rust-lang#138662 (Implement some basics in UEFI fs)
 - rust-lang#138800 (remove remnants of const_box feature)
 - rust-lang#138821 (match lowering cleanup: remove unused unsizing logic from `non_scalar_compare`)
 - rust-lang#138864 (Rework `--print` options documentation)
 - rust-lang#138868 (Add do_not_recommend typo help)
 - rust-lang#138882 (`with_scope` is only ever used for ast modules)

r? `@ghost`
`@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 24, 2025
…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#138662 (Implement some basics in UEFI fs)
 - rust-lang#138800 (remove remnants of const_box feature)
 - rust-lang#138821 (match lowering cleanup: remove unused unsizing logic from `non_scalar_compare`)
 - rust-lang#138864 (Rework `--print` options documentation)
 - rust-lang#138868 (Add do_not_recommend typo help)
 - rust-lang#138882 (`with_scope` is only ever used for ast modules)
 - rust-lang#138894 (Update books)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit dfd83be into rust-lang:master Mar 24, 2025
6 checks passed
@rustbot rustbot added this to the 1.87.0 milestone Mar 24, 2025
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Mar 24, 2025
Rollup merge of rust-lang#138821 - dianne:cleanup-non-scalar-compare, r=oli-obk

match lowering cleanup: remove unused unsizing logic from `non_scalar_compare`

Since array and slice constants are now translated to array and slice patterns, `non_scalar_compare` is only used for string comparisons. This specializes it to strings, renames it, and removes the unused array-unsizing logic.

This also updates the doc comments for  `thir::PatKind::Constant` and `TestKind::Eq`, which referred to them being used for slice references.

r? ````@oli-obk````
@dianne dianne deleted the cleanup-non-scalar-compare branch March 25, 2025 04:26
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4 participants