Add `into_iter().filter().collect()` as a comparison point since it was reported to be faster than `retain`.
Remove clone inside benchmark loop to reduce allocator noise.
Rollup of 7 pull requests
Successful merges:
- #90538 (Document how recursion is handled for `ty::Ty`)
- #90851 (Add unchecked downcast methods)
- #91209 (Implement ``@snapshot`` check for htmldocck)
- #91385 (Suggest the `pat_param` specifier before `|` on 2021 edition )
- #91478 (Remove incorrect newline from float cast suggestion)
- #91481 (Use let_else in some more places in rustc_lint)
- #91488 (Fix ICE when `yield`ing in function returning `impl Trait`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Fix ICE when `yield`ing in function returning `impl Trait`
Change an assert to a `delay_span_bug` and remove an unwrap, that should fix it.
Fixes#91477
rustdoc: Remove Clean impls for tuples
This PR removes all nine Clean impls on tuples, converting them to
functions instead.
The fact that these are impls causes several problems:
1. They are nameless, so it's unclear what they do.
2. It's hard to find where they're used apart from removing them and
seeing what errors occur (this applies to all Clean impls, not just
the tuple ones).
3. Rustc doesn't currently warn when impls are unused, so dead code
can accumulate easily (all Clean impls).
4. Their bodies often use tuple field indexing syntax (e.g., `self.1`)
to refer to their "arguments", which makes reading the code more
difficult.
As I noted, some of these problems apply to all Clean impls, but even
those problems are exacerbated by the tuple impls since they make
general understanding of the code harder.
Converting the impls to functions solves all four of these problems.
r? `@GuillaumeGomez`
This commit removes the first of nine Clean impls on tuples, converting
it to a function instead.
The fact that these are impls causes several problems:
1. They are nameless, so it's unclear what they do.
2. It's hard to find where they're used apart from removing them and
seeing what errors occur (this applies to all Clean impls, not just
the tuple ones).
3. Rustc doesn't currently warn when impls are unused, so dead code
can accumulate easily (all Clean impls).
4. Their bodies often use tuple field indexing syntax (e.g., `self.1`)
to refer to their "arguments", which makes reading the code more
difficult.
As I noted, some of these problems apply to all Clean impls, but even
those problems are exacerbated by the tuple impls since they make
general understanding of the code harder.
Converting the impls to functions solves all four of these problems.
Reintroduce `into_future` in `.await` desugaring
This is a reintroduction of the remaining parts from https://github.com/rust-lang/rust/pull/65244 that have not been relanded yet.
This isn't quite ready to merge yet. The last attempt was reverting due to performance regressions, so we need to make sure this does not introduce those issues again.
Issues #67644, #67982
/cc `@yoshuawuyts`
Revert "Auto merge of #91354 - fee1-dead:const_env, r=spastorino"
This reverts commit 18bb8c61a9, reversing
changes made to d9baa36190.
Reverts #91354 in order to address #91489. We would need to place this changes in a more granular way and would also be nice to address the small perf regression that was also introduced.
r? `@oli-obk`
cc `@fee1-dead`
Optimize `rustc_lexer`
The `cursor.first()` method in `rustc_lexer` now calls the `chars.next()` method instead of `chars.nth_char(0)`.
This allows LLVM to optimize the code better. The biggest win is that `eat_while()` is now fully inlined and generates better assembly. This improves the lexer's performance by 35% in a micro-benchmark I made (Lexing all 18MB of code in the compiler directory). But lexing is only a small part of the overall compilation time, so I don't know how significant it is.
Big thanks to criterion and `cargo asm`.
Make `array::{try_from_fn, try_map}` and `Iterator::try_find` generic over `Try`
Fixes#85115
This only updates unstable functions.
`array::try_map` didn't actually exist before; this adds it under the still-open tracking issue #79711 from the old PR #79713.
Tracking issue for the new trait: #91285
This would also solve the return type question in for the proposed `Iterator::try_reduce` in #87054
Rollup of 10 pull requests
Successful merges:
- #88906 (Implement write() method for Box<MaybeUninit<T>>)
- #90269 (Make `Option::expect` unstably const)
- #90854 (Type can be unsized and uninhabited)
- #91170 (rustdoc: preload fonts)
- #91273 (Fix ICE #91268 by checking that the snippet ends with a `)`)
- #91381 (Android: -ldl must appear after -lgcc when linking)
- #91453 (Document Windows TLS drop behaviour)
- #91462 (Use try_normalize_erasing_regions in needs_drop)
- #91474 (suppress warning about set_errno being unused on DragonFly)
- #91483 (Sync rustfmt subtree)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
suppress warning about set_errno being unused on DragonFly
Other targets allow this function to be unused, DragonFly just misses out due to providing a specialization.
This fixes a build error for DragonFly.
Android: -ldl must appear after -lgcc when linking
#90846 accidentally broke Android builds because it causes the standard library to no longer use `dlsym` on Android. This results in `libdl` being ignored by the linker since no symbols are needed from it. However, we later import `libgcc` for unwinding which *does* depend on `libdl` for `dl_iterate_phdr`. Since linkers don't revisit previous libraries when resolving symbols, this causes a linker error due to an undefined reference to `dl_iterate_phdr`.
This is resolved by adding a second `-ldl` after `-lgcc` in the linker command-line.
