Initialize BTree nodes directly in the heap
We can avoid any stack-local nodes entirely by using `Box::new_uninit`, and since the nodes are mostly `MaybeUninit` fields, we only need a couple of actual writes before `assume_init`. This should help with the stack overflows in #81444, and may also improve performance in general.
r? `@Mark-Simulacrum`
cc `@ssomers`
Rollup of 8 pull requests
Successful merges:
- #81811 (Fix doc test for Vec::retain(), now passes clippy::eval_order_dependence)
- #81900 (Organize trait test files)
- #81995 (Fix suggestion to introduce explicit lifetime)
- #82031 (Drop an unnecessary intermediate variable)
- #82033 (Refactor `get_word_attr` to return only `Option`)
- #82040 (Add test to prevent src link regression)
- #82041 (Add docs for shared_from_slice From impls)
- #82050 (Added tests to drain an empty vec)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Added tests to drain an empty vec
Discovered this kind of issue in an unrelated library.
The author copied the tests from here and AFAIK, there are no tests for this particular case.
https://github.com/LeonineKing1199/minivec/pull/19
Signed-off-by: Hanif Bin Ariffin <hanif.ariffin.4326@gmail.com>
Add docs for shared_from_slice From impls
The advantage of making these docs is mostly in pointing out that these
functions all make new allocations and copy/clone/move the source into them.
These docs are on the function, and not the `impl` block, to avoid showing
the "[+] show undocumented items" button.
CC #51430
Add test to prevent src link regression
Fixes#80502.
This PR is simply about adding a test to prevent a regression.
cc `@bugadani` `@CraftSpider`
r? `@camelid`
Refactor `get_word_attr` to return only `Option`
This commit removes `bool` from the return type of `NestedAttributesExt::get_word_attr` so it will return only `Option<ast::NestedMetaItem>` for less redundancy.
Closes#82016
r? `@jyn514`
Drop an unnecessary intermediate variable
Neither does it shorten the code nor does it provide a helpful name.
`@rustbot` modify labels +C-cleanup +T-compiler
r? `@varkor`
Fix suggestion to introduce explicit lifetime
Addresses #81650
Error message after fix:
```
error[E0311]: the parameter type `T` may not live long enough
--> src/main.rs:25:11
|
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
| -- help: consider adding an explicit lifetime bound...: `T: 'a +`
25 | scope.spawn(move |_| {
| ^^^^^
|
note: the parameter type `T` must be valid for the anonymous lifetime #2 defined on the function body at 24:1...
--> src/main.rs:24:1
|
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...so that the type `[closure@src/main.rs:25:17: 27:6]` will meet its required lifetime bounds
--> src/main.rs:25:11
|
25 | scope.spawn(move |_| {
| ^^^^^
```
Fix doc test for Vec::retain(), now passes clippy::eval_order_dependence
Doc test for Vec::retain() works correctly but is flagged by clippy::eval_order_dependence. Fix avoids the issue by using an iterator instead of an index.
Discovered this kind of issue in an unrelated library.
The author copied the tests from here and AFAIK, there are no tests for this particular case.
Signed-off-by: Hanif Bin Ariffin <hanif.ariffin.4326@gmail.com>
Rollup of 10 pull requests
Successful merges:
- #79775 (Fix injected errors when running doctests on a crate named after a keyword)
- #81012 (Stabilize the partition_point feature)
- #81479 (Allow casting mut array ref to mut ptr)
- #81506 (HWAddressSanitizer support)
- #81741 (Increment `self.index` before calling `Iterator::self.a.__iterator_ge…)
- #81850 (use RWlock when accessing os::env)
- #81911 (GAT/const_generics: Allow with_opt_const_param to return GAT param def_id)
- #82022 (Push a `char` instead of a `str` with len one into a String)
- #82023 (Remove unnecessary lint allow attrs on example)
- #82030 (Use `Iterator::all` instead of open-coding it)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
GAT/const_generics: Allow with_opt_const_param to return GAT param def_id
Fixes#75415Fixes#79666
cc ```@lcnr```
I've absolutely no idea who to r? for this...
use RWlock when accessing os::env
Multiple threads modifying the current process environment is fairly uncommon. Optimize for the more common read case.
r? ````@m-ou-se````
Increment `self.index` before calling `Iterator::self.a.__iterator_ge…
…`t_unchecked` in `Zip` `TrustedRandomAccess` specialization
Otherwise if `Iterator::self.a.__iterator_get_unchecked` panics the
index would not have been incremented yet and another call to
`Iterator::next` would read from the same index again, which is not
allowed according to the API contract of `TrustedRandomAccess` for
`!Clone`.
Fixes https://github.com/rust-lang/rust/issues/81740
Allow casting mut array ref to mut ptr
Allow casting mut array ref to mut ptr
We now allow two new casts:
- mut array reference to mut ptr. Example:
let mut x: [usize; 2] = [0, 0];
let p = &mut x as *mut usize;
We allow casting const array references to const pointers so not
allowing mut references to mut pointers was inconsistent.
- mut array reference to const ptr. Example:
let mut x: [usize; 2] = [0, 0];
let p = &mut x as *const usize;
This was similarly inconsistent as we allow casting mut references to
const pointers.
Existing test 'vector-cast-weirdness' updated to test both cases.
Fixes#24151
The advantage of making these docs is mostly in pointing out that these
functions all make new allocations and copy/clone/move the source into them.
These docs are on the function, and not the `impl` block, to avoid showing
the "[+] show undocumented items" button.
CC #51430
Try fast_reject::simplify_type in coherence before doing full check
This is a reattempt at landing #69010 (by `@jonas-schievink).` The change adds a fast path for coherence checking to see if there's no way for types to unify since full coherence checking can be somewhat expensive.
This has big effects on code generated by the [`windows`](https://github.com/microsoft/windows-rs) which in some cases spends as much as 20% of compilation time in the `specialization_graph_of` query. In local benchmarks this took a compilation that previously took ~500 seconds down to ~380 seconds.
This is surely not going to make a difference on much smaller crates, so the question is whether it will have a negative impact. #69010 was closed because some of the perf suite crates did show small regressions.
Additional discussion of this issue is happening [here](https://rust-lang.zulipchat.com/#narrow/stream/247081-t-compiler.2Fperformance/topic/windows-rs.20perf).
Rollup of 16 pull requests
Successful merges:
- #79983 (fix indefinite article in cell.rs)
- #81831 (Don't display `mut` in arguments for functions documentation)
- #81947 (Relax ItemCtxt::to_ty lifetime)
- #81954 (RELEASES.md 1.50: Group platform support notes together)
- #81955 (bootstrap: Locate llvm-dwp based on llvm-config bindir)
- #81959 (Fix assosiated typo)
- #81964 (Fix documentation not showing on localStorage error)
- #81968 (bootstrap: fix wrong docs installation path)
- #81990 (Make suggestion of changing mutability of arguments broader)
- #81994 (Improve long explanation for E0542 and E0546)
- #81997 (dist: include src/build_helper as part of the crate graph for rustc-dev)
- #82003 (Stack probes: fix error message)
- #82004 (clean up clean::Static struct)
- #82011 (Fix private intra-doc warnings on associated items)
- #82013 (Tell user how to fix CI file being not up to date)
- #82017 (Fix typo in mod.rs)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Fix private intra-doc warnings on associated items
The issue was that the `kind, id` override was previously only being
considered for the disambiguator check, not the privacy check. This uses
the same ID for both.
Fixes https://github.com/rust-lang/rust/issues/81981.
r? ``@max-heller``
clean up clean::Static struct
Having a `String` for the expression didn't make much sense, and even less when it's actually not used (except in json so I kept it).
r? ``@jyn514``
dist: include src/build_helper as part of the crate graph for rustc-dev
The build_helper dependency is used to build the compiler/rustc_llvm build script.
Since it was missing, it wasn't possible to really use rustc-dev to
build, see for instance: https://github.com/rust-analyzer/rust-analyzer/issues/7589.
Make suggestion of changing mutability of arguments broader
Fix#81421
Previously rustc tries to emit the suggestion of changing mutablity unless `!trait_ref.has_infer_types_or_consts() && self.predicate_can_apply(obligation.param_env, trait_ref)` and this led to some false negatives to occur.
