Rollup of 6 pull requests #111732
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Rollup of 6 pull requests #111732
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This is inherited from the old PR This method returns an iterator over mapped windows of the starting iterator. Adding the more straight-forward `Iterator::windows` is not easily possible right now as the items are stored in the iterator type, meaning the `next` call would return references to `self`. This is not allowed by the current `Iterator` trait design. This might change once GATs have landed. The idea has been brought up by @m-ou-se here: https://rust-lang.zulipchat.com/#narrow/stream/219381-t-libs/topic/Iterator.3A.3A.7Bpairwise.2C.20windows.7D/near/224587771 Co-authored-by: Lukas Kalbertodt <lukas.kalbertodt@gmail.com>
* ensuring that offset_of!(Self, ...) works iff inside an impl block * ensuring that the output type is usize and doesn't coerce. this can be changed in the future, but if it is done, it should be a conscious descision * improving the privacy checking test * ensuring that generics don't let you escape the unsized check
- add `must_use` to `early_error_no_abort` this was already being used at its only callsite, but this ensures that new code remembers to use it if it's called in the future. - remove outdated and incorrect comment in `builder.rs`. `doc_rust_lang_org_channel` doesn't exist in rustdoc, it gets it from an env var instead.
…, r=Mark-Simulacrum Add `Iterator::map_windows` Tracking issue: rust-lang#87155. This is inherited from the old PR rust-lang#82413. Unlike rust-lang#82413, this PR implements the `MapWindows` to be lazy: only when pulling from the outer iterator, `.next()` of the inner iterator will be called. ## Implementaion Steps - [x] Implement `MapWindows` to keep the iterators' [*Laziness*](https://doc.rust-lang.org/std/iter/index.html#laziness) contract. - [x] Fix the known bug of memory access error. - [ ] Full specialization of iterator-related traits for `MapWindows`. - [x] `Iterator::size_hint`, - [x] ~`Iterator::count`~, - [x] `ExactSizeIterator` (when `I: ExactSizeIterator`), - [x] ~`TrustedLen` (when `I: TrustedLen`)~, - [x] `FusedIterator`, - [x] ~`Iterator::advance_by`~, - [x] ~`Iterator::nth`~, - [ ] ... - [ ] More tests and docs. ## Unresolved Questions: - [ ] Is there any more iterator-related traits should be specialized? - [ ] Is the double-space buffer worth? - [ ] Should there be `rmap_windows` or something else? - [ ] Taking GAT for consideration, should the mapper function be `FnMut(&[I::Item; N]) -> R` or something like `FnMut(ArrayView<'_, I::Item, N>) -> R`? Where `ArrayView` is mentioned in rust-lang/generic-associated-types-initiative#2. - It can save memory, only the same size as the array window is needed, - It is more efficient, which requires less data copies, - It is possibly compatible with the GATified version of `LendingIterator::windows`. - But it prevents the array pattern matching like `iter.map_windows(|_arr: [_; N]| ())`, unless we extend the array pattern to allow matching the `ArrayView`.
…etrochenkov fix(resolve): only disambiguate binding key during define - close rust-lang#110164 - discussion: rust-lang#110264 (comment) r? `@petrochenkov`
…e, r=wesleywiser Dont check `must_use` on nested `impl Future` from fn Fixes (but does not close, per beta policy) rust-lang#111484 Also fixes a `FIXME` left in the code about (presumably) false-positives on non-async `#[must_use] fn() -> impl Future` cases, though if that's not desirable to include in the beta backport then I can certainly revert it. Beta nominating as it fixes a beta ICE.
very minor cleanups - add `must_use` to `early_error_no_abort` this was already being used at its only callsite, but this ensures that new code remembers to use it if it's called in the future. found this while investigating rust-lang#110090. - remove outdated and incorrect comment in `builder.rs`. `doc_rust_lang_org_channel` doesn't exist in rustdoc, it gets it from an env var instead: https://github.com/rust-lang/rust/blob/b275d2c30b6e88cc48747f349f7137076d450658/src/librustdoc/clean/utils.rs#L569-L573
Always name the return place. MIR opts more and more consider `_0` as just another local, so there is no point in keeping the special case in debug-info logic.
Add more tests for the offset_of macro Implements what I [suggested in the tracking issue](rust-lang#106655 (comment)), plus some further improvements: * ensuring that offset_of!(Self, ...) works iff inside an impl block * ensuring that the output type is usize and doesn't coerce. this can be changed in the future, but if it is done, it should be a conscious decision * improving the privacy checking test * ensuring that generics don't let you escape the unsized check r? `@WaffleLapkin`
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@bors r+ rollup=never p=5 |
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⌛ Testing commit 660ed0e with merge 10eeee2c42736b1b367e45fce90e9ef5650de4db... |
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The job Click to see the possible cause of the failure (guessed by this bot) |
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💔 Test failed - checks-actions |
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Successful merges:
Iterator::map_windows#94667 (AddIterator::map_windows)must_useon nestedimpl Futurefrom fn #111491 (Dont checkmust_useon nestedimpl Futurefrom fn)r? @ghost
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