Rollup of 14 pull requests #63319
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Rollup of 14 pull requests #63319
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…dation step Co-Authored-By: Mazdak Farrokhzad <twingoow@gmail.com>
Co-Authored-By: Aleksey Kladov <aleksey.kladov@gmail.com>
This was missed in PR rust-lang#62293.
Co-Authored-By: Aleksey Kladov <aleksey.kladov@gmail.com>
This is just needless indirection.
This is one of the behaviors we no longer allow in NLL. Since it can lead to undefined behavior, I think it's definitely worth making it a hard error without waiting to turn off migration mode (rust-lang#58781). Closes rust-lang#60450. My ulterior motive here is making it impossible to leave variables partially initialized across a yield (see discussion at rust-lang#63035), so tests are included for that.
Also, the move was done nearly a year ago
…scottmcm
Implement DoubleEndedIterator for iter::{StepBy, Peekable, Take}
Now that `DoubleEndedIterator::nth_back` has landed, `StepBy` and `Take` can have an efficient `DoubleEndedIterator` implementation. I don't know if there was any particular reason for `Peekable` not having a `DoubleEndedIterator` implementation, but it's quite trivial and I don't see any drawbacks to having it.
I'm not very happy about the implementation of `Peekable::try_rfold`, but I didn't see another way to only take the value out of `self.peeked` in case `self.iter.try_rfold` didn't exit early.
I only added `Peekable::rfold` (in addition to `try_rfold`) because its `Iterator` implementation has both `fold` and `try_fold` (and for similar reasons I added `Take::try_rfold` but not `Take::rfold`). Do we have any guidelines on whether we want both? If we do want both, maybe we should investigate which iterator adaptors override `try_fold` but not `fold` and add the missing implementations. At the moment I think that it's better to always have iterator adaptors implement both, because some iterators have a simpler `fold` implementation than their `try_fold` implementation.
The tests that I added may not be sufficient because they're all just existing tests where `next`/`nth`/`fold`/`try_fold` are replaced by their DEI counterparts, but I do think all paths are covered. Is there anything in particular that I should probably also test?
Remove special code-path for handing unknown tokens In `StringReader`, we have a buffer of fatal errors, which is used only in a single case: when we see something which is not a reasonable token at all, like `🦀`. I think a more straightforward thing to do here is to produce an explicit error token in this case, and let the next layer (the parser), deal with it. However currently this leads to duplicated error messages. What should we do with this? Naively, I would think that emitting (just emitting, not raising) `FatalError` should stop other errors, but looks like this is not the case? We can also probably tweak parser on the case-by-case basis, to avoid emitting "expected" errors if the current token is an `Err`. I personally also fine with cascading errors in this case: it's quite unlikely that you actually type a fully invalid token. @petrochenkov, which approach should we take to fight cascading errors?
Explaining the reason why validation is performed in to_str of path.rs I thought it's good to explain the reason for the validation during the conversion between Path/PathBuffer into str, which explains the reason for returning an Option at this point (good for beginners who are reading through the docs).
…ized, r=Centril Make use of possibly uninitialized data [E0381] a hard error This is one of the behaviors we no longer allow in NLL. Since it can lead to undefined behavior, I think it's definitely worth making it a hard error without waiting to turn off migration mode (rust-lang#58781). Closes rust-lang#60450. My ulterior motive here is making it impossible to leave variables partially initialized across a yield (see rust-lang#60889, discussion at rust-lang#63035), so tests are included for that. cc rust-lang#54987 --- I'm not sure if bypassing the buffer is a good way of doing this. We could also make a `force_errors_buffer` or similar that gets recombined with all the errors as they are emitted. But this is simpler and seems fine to me. r? @Centril cc @cramertj @nikomatsakis @pnkfelix @RalfJung
fix UB in a test We used to compare two mutable references that were supposed to point to the same thing. That's no good. Compare them as raw pointers instead.
…rors, r=estebank Revert "Rollup merge of rust-lang#62696 - chocol4te:fix_#62194, r=estebank" This reverts commit df21a6f (rust-lang#62696), reversing changes made to cc16d04. That PR makes error messages worse than before, and we couldn't come up with a way of actually making them better, so revert it for now. Any idea for making this error message better is welcome! Fixes rust-lang#63145. r? @estebank
…chenkov Some more libsyntax::attr cleanup Much smaller patch than the last one, mostly just finishing up by removing some Span arguments. r? @petrochenkov
…Centril Remove leftover AwaitOrigin This was missed in PR rust-lang#62293.
Don't store &Span This is just needless indirection.
improve align_offset docs Cc @shepmaster
…=oli-obk Make qualify consts in_projection use PlaceRef r? @oli-obk
doc: fix broken sentence Also, the move was done nearly a year ago
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@bors r+ p=14 rollup=never |
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📌 Commit c27405f has been approved by |
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Rollup of 14 pull requests Successful merges: - #61457 (Implement DoubleEndedIterator for iter::{StepBy, Peekable, Take}) - #63017 (Remove special code-path for handing unknown tokens) - #63184 (Explaining the reason why validation is performed in to_str of path.rs) - #63230 (Make use of possibly uninitialized data [E0381] a hard error) - #63260 (fix UB in a test) - #63264 (Revert "Rollup merge of #62696 - chocol4te:fix_#62194, r=estebank") - #63272 (Some more libsyntax::attr cleanup) - #63285 (Remove leftover AwaitOrigin) - #63287 (Don't store &Span) - #63293 (Clarify align_to's requirements and obligations) - #63295 (improve align_offset docs) - #63299 (Make qualify consts in_projection use PlaceRef) - #63312 (doc: fix broken sentence) - #63315 (Fix #63313) Failed merges: r? @ghost
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☀️ Test successful - checks-azure |
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📣 Toolstate changed by #63319! Tested on commit 8996328. 💔 reference on windows: test-pass → test-fail (cc @steveklabnik @Havvy @matthewjasper @ehuss, @rust-lang/infra). |
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Tested on commit rust-lang/rust@8996328. Direct link to PR: <rust-lang/rust#63319> 💔 reference on windows: test-pass → test-fail (cc @steveklabnik @Havvy @matthewjasper @ehuss, @rust-lang/infra). 💔 reference on linux: test-pass → test-fail (cc @steveklabnik @Havvy @matthewjasper @ehuss, @rust-lang/infra).
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r? @ghost