Remove unnecessary is_empty checks
#141377
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It was added in rust-lang#140052, but the subsequent changes in rust-lang#140252 means it is no longer necessary. (Indeed, `Ident`s cannot be empty any more.)
`Ident`s can no longer be empty, so the test always succeeds.
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| Box::new([].iter()) | ||
| }; | ||
| iter.filter(move |item| { | ||
| tcx.associated_items(assoc_items_of).filter_by_name_unhygienic(ident.name).filter(move |item| { |
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Unless I missed something, https://github.com/rust-lang/rust/blame/master/compiler/rustc_middle/src/ty/assoc.rs#L255 is still failing if the provided Symbol is empty. How come it's not triggering the assert anymore?
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Should this assert be removed as well then?
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(Can be done in a follow-up though)
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The assertion in filter_by_name_unhygienic? The function takes a Symbol, which can be empty (unlike Ident) so I figure it was reasonable to leave it there.
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Oh I see. A bit confusing. 😄
GuillaumeGomez
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May 22, 2025
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Thanks for the detailed explanations and the update! @bors r+ rollup |
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#141355 (ci: improve citool job db errors) - rust-lang#141359 (Fix `FnOnce` impl for `AsyncFn`/`AsyncFnMut` self-borrowing closures in new solver) - rust-lang#141362 (Normalize aliases to correct kind of error term) - rust-lang#141377 (Remove unnecessary `is_empty` checks) - rust-lang#141381 (try_cast_aligned: avoid bare int-to-ptr casts) - rust-lang#141382 (ci: convert distcheck to free runner) - rust-lang#141389 (ci: prepare aws access keys for migration) - rust-lang#141390 (Don't allow `poly_select` in new solver) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#141377 - nnethercote:rm-unnecessary-is_empty-checks, r=GuillaumeGomez Remove unnecessary `is_empty` checks Part of rust-lang#137978. r? `@GuillaumeGomez`
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Part of #137978.
r? @GuillaumeGomez