Rollup of 9 pull requests #99735
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Rollup of 9 pull requests #99735
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Constify a few `(Partial)Ord` impls Only a few `impl`s are constified for now, as rust-lang#92257 has not landed in the bootstrap compiler yet and quite a few impls would need that fix. This unblocks rust-lang#92228, which unblocks marking iterator methods as `default_method_body_is_const`.
Simplify some code that depend on Deref Now that we can assume rust-lang#97025 works, it's safe to expect Deref is always in the first place of projections. With this, I was able to simplify some code that depended on Deref's place in projections. When we are able to move Derefer before `ElaborateDrops` successfully we will be able to optimize more places. r? `@oli-obk`
correct the output of a `capacity` method example The output of this example in std::alloc is different from which shown in the comment. I have tested it on both Linux and Windows.
clarify how write_bytes can lead to UB due to invalid values Fixes rust-lang/unsafe-code-guidelines#330 Cc ``@5225225``
Lighten up const_prop_lint, reusing const_prop r? `@oli-obk`
…li-obk don't ICE on invalid dyn calls Due to rust-lang#50781 this is actually reachable. Fixes rust-lang/miri#2432 r? ``@oli-obk``
…ochenkov Expose size_hint() for TokenStream's iterator The iterator for `proc_macro::TokenStream` is a wrapper around a `Vec` iterator: https://github.com/rust-lang/rust/blob/babff2211e3ae9ef52852dc1b01f3eacdd94c12e/library/proc_macro/src/lib.rs#L363-L371 so it can cheaply provide a perfectly precise size hint, with just a pointer subtraction: https://github.com/rust-lang/rust/blob/babff2211e3ae9ef52852dc1b01f3eacdd94c12e/library/alloc/src/vec/into_iter.rs#L170-L177 I need the size hint in syn (https://github.com/dtolnay/syn/blob/1.0.98/src/buffer.rs) to reduce allocations when converting TokenStream into syn's internal TokenBuffer representation. Aside from `size_hint`, the other non-default methods in `std::vec::IntoIter`'s `Iterator` impl are `advance_by`, `count`, and `__iterator_get_unchecked`. I've included `count` in this PR since it is trivial. I did not include `__iterator_get_unchecked` because it is spoopy and I did not feel like dealing with that. Lastly, I did not include `advance_by` because that requires `feature(iter_advance_by)` (rust-lang#77404) and I noticed this comment at the top of libproc_macro: https://github.com/rust-lang/rust/blob/babff2211e3ae9ef52852dc1b01f3eacdd94c12e/library/proc_macro/src/lib.rs#L20-L22
…ler-errors `Inherited` always has `TypeckResults` available
…nd, r=notriddle Fix sidebar background Fixes rust-lang#99691. cc `@jsha` r? `@notriddle`
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@bors r+ rollup=never p=9 |
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☀️ Test successful - checks-actions |
This was referenced Jul 26, 2022
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Finished benchmarking commit (a867059): comparison url. Instruction count
Max RSS (memory usage)Results
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If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf. @rustbot label: -perf-regression Footnotes |
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Successful merges:
(Partial)Ordimpls #92390 (Constify a few(Partial)Ordimpls)capacitymethod example #98710 (correct the output of acapacitymethod example)Inheritedalways hasTypeckResultsavailable #99709 (Inheritedalways hasTypeckResultsavailable)Failed merges:
r? @ghost
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