Commit Graph

7072 Commits

Author SHA1 Message Date
Ralf Jung
0dc94404ee remove a whole bunch of unnecessary const feature gates 2024-11-30 10:23:39 +01:00
Michael van Straten
f371952cde Abstract ProcThreadAttributeList into its own struct 2024-11-30 10:17:59 +01:00
许杰友 Jieyou Xu (Joe)
70b107910b
Rollup merge of #133496 - rust-wasi-web:wasi-available-parallelism, r=Amanieu
thread::available_parallelism for wasm32-wasip1-threads

The target has limited POSIX support and provides the `libc::sysconf` function which allows querying the number of available CPUs.
2024-11-30 12:57:35 +08:00
许杰友 Jieyou Xu (Joe)
9eeae42de2
Rollup merge of #132515 - kornelski:home_fix, r=jhpratt
Fix and undeprecate home_dir()

`home_dir()` has been deprecated for 6 years due to using `HOME` env var on Windows.

It's been a long time, and having a perpetually buggy and deprecated function in the standard library is not useful. I propose fixing and undeprecating it.

6 years seems more than long enough to warn users against relying on this function. The change in behavior is minor, and it's more of a bug fix than breakage. The old behavior is unlikely to be useful, and even if anybody actually needed to specifically use the non-standard `HOME` on Windows, they can trivially mitigate this change by reading the env var themselves.

----

Use of `USERPROFILE` is in line with the `home` crate: 37bc5f0232/crates/home/src/windows.rs (L12)

The `home` crate uses `SHGetKnownFolderPath` instead of `GetUserProfileDirectoryW`. AFAIK it doesn't make any difference in practice, because `SHGetKnownFolderPath` merely adds support for more kinds of folders, including virtual (non-filesystem) folders identified by a GUID, but the specific case of [`FOLDERID_Profile`](https://learn.microsoft.com/en-us/windows/win32/shell/knownfolderid#FOLDERID_Profile) is documented as a FIXED folder (a regular filesystem path). Just in case, I've added a note to documentation that the use of `GetUserProfileDirectoryW` can change.

I've used `CURRENT_RUSTC_VERSION` in a doccomment. `replace-version-placeholder` tool seems to perform a simple string replacement, so hopefully it'll get updated.
2024-11-30 12:57:33 +08:00
许杰友 Jieyou Xu (Joe)
dd99f11ef8
Rollup merge of #116161 - Soveu:varargs2, r=cjgillot
Stabilize `extended_varargs_abi_support`

I think that is everything? If there is any documentation regarding `extern` and/or varargs to correct, let me know, some quick greps suggest that there might be none.

Tracking issue: https://github.com/rust-lang/rust/issues/100189
2024-11-30 12:56:50 +08:00
bors
1fc691e6dd Auto merge of #133533 - BoxyUwU:bump-boostrap, r=jieyouxu,Mark-Simulacrum
Bump boostrap compiler to new beta

Currently failing due to something about the const stability checks and `panic!`. I'm not sure why though since I wasn't able to see any PRs merged in the past few days that would result in a `cfg(bootstrap)` that shouldn't be removed. cc `@RalfJung` #131349
2024-11-29 22:39:10 +00:00
Martin Kröning
27c4c3a978
update link to "C++ Exceptions under the hood" blog
The link was introduced in 0ec321f7b5.
For the old link see https://web.archive.org/web/20170409223244/https://monoinfinito.wordpress.com/series/exception-handling-in-c/.
The blog has migrated from WordPress to Blogger in 2021 and to GitHub pages in 2024.
2024-11-29 11:46:34 +01:00
Matthias Krüger
8ca5a907a5
Rollup merge of #133530 - timvisee:master, r=jhpratt
Use consistent wording in docs, use is zero instead of is 0

In documentation, wording of _"`rhs` is zero"_ and _"`rhs` is 0"_ is intermixed. This is especially visible [here](https://doc.rust-lang.org/std/primitive.usize.html#method.div_ceil).

This changes all occurrences to _"`rhs` is zero"_ for better readability.
2024-11-29 10:18:58 +01:00
Sanchith Hegde
d599d5a381
fix: fix codeblocks in PathBuf example 2024-11-29 03:50:26 +05:30
bors
d53f0b1d8e Auto merge of #123244 - Mark-Simulacrum:share-inline-never-generics, r=saethlin
Enable -Zshare-generics for inline(never) functions

This avoids inlining cross-crate generic items when possible that are
already marked inline(never), implying that the author is not intending
for the function to be inlined by callers. As such, having a local copy
may make it easier for LLVM to optimize but mostly just adds to binary
bloat and codegen time. In practice our benchmarks indicate this is
indeed a win for larger compilations, where the extra cost in dynamic
linking to these symbols is diminished compared to the advantages in
fewer copies that need optimizing in each binary.

It might also make sense it expand this with other heuristics (e.g.,
`#[cold]`) in the future, but this seems like a good starting point.

FWIW, I expect that doing cleanup in where we make the decision
what should/shouldn't be shared is also a good idea. Way too
much code needed to be tweaked to check this. But I'm hoping
to leave that for a follow-up PR rather than blocking this on it.
2024-11-28 21:44:34 +00:00
Mark Rousskov
4a216a25d1 Share inline(never) generics across crates
This reduces code sizes and better respects programmer intent when
marking inline(never). Previously such a marking was essentially ignored
for generic functions, as we'd still inline them in remote crates.
2024-11-28 13:43:05 -05:00
timvisee
89b20e95fd
Also use zero when referencing to capacity or length 2024-11-28 09:47:11 +01:00
bors
f005c7437d Auto merge of #133561 - GuillaumeGomez:rollup-g4upmv4, r=GuillaumeGomez
Rollup of 12 pull requests

Successful merges:

 - #129409 (Expand std::os::unix::fs::chown() doc with a warning)
 - #133320 (Add release notes for Rust 1.83.0)
 - #133368 (Delay a bug when encountering an impl with unconstrained generics in `codegen_select`)
 - #133428 (Actually use placeholder regions for trait method late bound regions in `collect_return_position_impl_trait_in_trait_tys`)
 - #133512 (Add `as_array` and `as_mut_array` conversion methods to slices.)
 - #133519 (Check `xform_ret_ty` for WF in the new solver to improve method winnowing)
 - #133520 (Structurally resolve before applying projection in borrowck)
 - #133534 (extend group-forbid-always-trumps-cli test)
 - #133537 ([rustdoc] Fix new clippy lints)
 - #133543 ([AIX] create shim for lgammaf_r)
 - #133547 (rustc_span: Replace a `HashMap<_, ()>` with `HashSet`)
 - #133550 (print generated doc paths)

r? `@ghost`
`@rustbot` modify labels: rollup
2024-11-28 03:36:03 +00:00
Guillaume Gomez
82d4eaeaff
Rollup merge of #133543 - mustartt:aix-lgammaf_r-shim, r=cuviper
[AIX] create shim for lgammaf_r

On AIX, we don't have 32bit floating point for re-entrant `lgammaf_r` but we do have the 64bit floating point re-entrant `lgamma_r` so we can use the 64bit version instead and truncate back to a 32bit float.

This solves the linker missing symbol for `.lgammaf_r` when testing and using these parts of the `std`.
2024-11-28 03:14:51 +01:00
Guillaume Gomez
10193a347a
Rollup merge of #129409 - grinapo:patch-1, r=Amanieu
Expand std::os::unix::fs::chown() doc with a warning

Include warning about losing setuid/gid when chowning, per POSIX.

It is about the underlying system call but it is rather useful to mention it in the help in case someone accidentally forgets (don't look at me :)).
2024-11-28 03:14:45 +01:00
Matthias Krüger
a8b690fada
Rollup merge of #133498 - GuillaumeGomez:missing-examples, r=joboet
Add missing code examples on `LocalKey`

r? ``@Amanieu``
2024-11-27 22:23:25 +01:00
Soveu
685f189b43 Stabilize extended_varargs_abi_support 2024-11-27 22:21:33 +01:00
Henry Jiang
527b6065ba
fmt 2024-11-27 12:02:02 -05:00
Boxy
22998f0785 update cfgs 2024-11-27 15:14:54 +00:00
Sebastian Urban
4342ec0cf2 Implement code review 2024-11-27 13:30:18 +01:00
Boxy
174ad448c7 replace placeholder version 2024-11-27 12:10:21 +00:00
Matthias Krüger
dcebc5eddd
Rollup merge of #133449 - joboet:io_const_error, r=tgross35
std: expose `const_io_error!` as `const_error!`

ACP: https://github.com/rust-lang/libs-team/issues/205
Tracking issue: https://github.com/rust-lang/rust/issues/133448

Probably best reviewed commit-by-commit, the first one does the API change, the second does the mass-rename.
2024-11-27 08:13:47 +01:00
bors
dd2837ec5d Auto merge of #133505 - compiler-errors:rollup-xjp8hdi, r=compiler-errors
Rollup of 12 pull requests

Successful merges:

 - #133042 (btree: add `{Entry,VacantEntry}::insert_entry`)
 - #133070 (Lexer tweaks)
 - #133136 (Support ranges in `<[T]>::get_many_mut()`)
 - #133140 (Inline ExprPrecedence::order into Expr::precedence)
 - #133155 (Yet more `rustc_mir_dataflow` cleanups)
 - #133282 (Shorten the `MaybeUninit` `Debug` implementation)
 - #133326 (Remove the `DefinitelyInitializedPlaces` analysis.)
 - #133362 (No need to re-sort existential preds in relate impl)
 - #133367 (Simplify array length mismatch error reporting (to not try to turn consts into target usizes))
 - #133394 (Bail on more errors in dyn ty lowering)
 - #133410 (target check_consistency: ensure target feature string makes some basic sense)
 - #133435 (miri: disable test_downgrade_observe test on macOS)

r? `@ghost`
`@rustbot` modify labels: rollup
2024-11-26 21:57:32 +00:00
Piotr Osiewicz
f4ab9829e1 chore: Improve doc comments 2024-11-26 22:46:12 +01:00
joboet
c14d137bfc
std: update internal uses of io::const_error! 2024-11-26 18:38:24 +01:00
Michael Goulet
c4e2b0c605
Rollup merge of #133435 - RalfJung:test_downgrade_observe, r=tgross35
miri: disable test_downgrade_observe test on macOS

Due to https://github.com/rust-lang/rust/issues/121950, this test can fail on Miri. The test is also quite slow on Miri (taking more than 30s) due to the high iteration count (a total of 2000), so let's reduce that a little.

Fixes https://github.com/rust-lang/rust/issues/133421
2024-11-26 12:03:45 -05:00
Guillaume Gomez
a06532e639
Rollup merge of #133464 - RalfJung:whitespace-panic, r=joboet
std:🧵 avoid leading whitespace in some panic messages

This:
```
        panic!(
            "use of std:🧵:current() is not possible after the thread's
         local data has been destroyed"
        )
```
will print a newline followed by a bunch of spaces, since the entire string literal is interpreted literally.

I think the intention was to print the message without the newline and the spaces, so let's add some `\` to make that happen.

r? ``@joboet``
2024-11-26 15:32:17 +01:00
Guillaume Gomez
ddb6904ee4
Rollup merge of #133419 - CromFr:add-path-strip_prefix-test-example, r=Amanieu
Added a doc test for std::path::strip_prefix

I was about 90% sure `Path::new("/test/haha/foo.txt").strip_prefix("/te")` would return an Err, but I couldn't find an example to confirm this behaviour.

This should be an easy merge :)
2024-11-26 15:32:13 +01:00
Guillaume Gomez
02c3e6d087 Add missing code examples on LocalKey 2024-11-26 15:29:47 +01:00
Sebastian Urban
f0b7008648 thread::available_parallelism for wasm32-wasip1-threads
The target has limited POSIX support and provides the sysconf
function which allows querying the number of available
CPUs.
2024-11-26 14:06:05 +01:00
Piotr Osiewicz
692c19ae80 Refactor ReadDir into a state machine 2024-11-26 14:03:01 +01:00
Sebastian Urban
ec5f41a953 Run TLS destructors for wasm32-wasip1-threads
The target has support for pthreads and allows
registration of TLS destructors.
2024-11-25 19:57:57 +01:00
Ralf Jung
8bc8adb8dc std:🧵 avoid leading whitespace in some panic messages 2024-11-25 18:31:49 +01:00
joboet
d39afacbdf
std: expose const_io_error! as const_error!
ACP: rust-lang/libs-team#205
Tracking issue: #133448
2024-11-25 15:23:31 +01:00
Ralf Jung
c9b56b9694 miri: disable test_downgrade_observe test on macOS 2024-11-25 08:00:22 +01:00
许杰友 Jieyou Xu (Joe)
1741b394da
Rollup merge of #133298 - n0toose:remove-dir-all-but-not-paths, r=Noratrieb
Mention that std::fs::remove_dir_all fails on files

This is explicitly mentioned for std::fs::remove_file.

It is more likely for a slightly lazy programmer to believe that removing a file would work and that they do not have to distinguish between directories (with contents) and files themself, because of the function's recursive nature and how it distinguishes between files and directories when removing them.

Follow-up for #133183.
2024-11-25 00:39:05 +08:00
许杰友 Jieyou Xu (Joe)
31b4023e24
Rollup merge of #132730 - joboet:after_main_sync, r=Noratrieb
std: allow after-main use of synchronization primitives

By creating an unnamed thread handle when the actual one has already been destroyed, synchronization primitives using thread parking can be used even outside the Rust runtime.

This also fixes an inefficiency in the queue-based `RwLock`: if `thread::current` was not initialized yet, it will create a new handle on every parking attempt without initializing `thread::current`. The private `current_or_unnamed` function introduced here fixes this.
2024-11-25 00:39:03 +08:00
Crom (Thibaut CHARLES)
f3ad32b769
Added a doc test for std::path::strip_prefix 2024-11-24 14:37:40 +01:00
Matthias Krüger
220251e181
Rollup merge of #133389 - eduardosm:stabilize-const_float_methods, r=RalfJung
Stabilize `const_float_methods`

Tracking issue: https://github.com/rust-lang/rust/issues/130843
Relnotes: #133383

Stabilized const API:

```rust
// in `core`
impl f32/f64 {
    pub const fn recip(self) -> Self;
    pub const fn to_degrees(self) -> Self;
    pub const fn to_radians(self) -> Self;
    pub const fn max(self, other: Self) -> Self;
    pub const fn min(self, other: Self) -> Self;
    pub const fn clamp(self, min: Self, max: Self) -> Self;
    pub const fn abs(self) -> Self;
    pub const fn signum(self) -> Self;
    pub const fn copysign(self, sign: Self) -> Self;
}
```

Closes https://github.com/rust-lang/rust/issues/130843

r? libs-api

cc `@RalfJung` -- I think the way const-stability attributes work have change a bit since the last time a wrote a const-stabilization PR, please make sure I got them right.
2024-11-24 11:08:20 +01:00
bors
4e4c20d2ab Auto merge of #132611 - compiler-errors:async-prelude, r=ibraheemdev
Add `AsyncFn*` to the prelude in all editions

The general vibe is that we will most likely stabilize the `feature(async_closure)` *without* the `async Fn()` trait bound modifier.

Without `async Fn()` bound syntax, this necessitates users to spell the bound like `AsyncFn()`. Since `core::ops::AsyncFn` is not in the prelude, users will need to import these any time they actually want to use the trait. This seems annoying, so let's add these traits to the prelude unstably.

We're trying to work on the general vision of `async` trait bound modifier in general in: https://github.com/rust-lang/rfcs/pull/3710, however that RFC still needs more time for consensus to converge, and we've decided that the value that users get from calling the bound `async Fn()` is *not really* worth blocking landing async closures in general.
2024-11-24 04:53:16 +00:00
Eduardo Sánchez Muñoz
6f7dc38031 Stabilize const_float_methods 2024-11-23 18:42:44 +01:00
许杰友 Jieyou Xu (Joe)
f860f5bf90
Rollup merge of #131505 - madsmtm:darwin_user_temp_dir, r=dtolnay
use `confstr(_CS_DARWIN_USER_TEMP_DIR, ...)` as a `TMPDIR` fallback on Darwin

Rebased version of https://github.com/rust-lang/rust/pull/100824, FCP has completed there. Motivation from https://github.com/rust-lang/rust/pull/100824#issuecomment-1262264127:

> This is a behavioral change in an edge case on Darwin platforms (macOS, iOS, ...).
>
> Specifically, this changes it so that iff `TMPDIR` is unset in the environment, then we use `confstr(_CS_DARWIN_USER_TEMP_DIR, ...)` to query the user temporary directory (previously we just returned `"/tmp"`). If this fails (probably possible in a sandboxed program), only then do we fallback to `"/tmp"` (as before).
>
> The motivations here are two-fold:
>
> 1. This is better for security, and is in line with the [platform security recommendations](https://developer.apple.com/library/archive/documentation/Security/Conceptual/SecureCodingGuide/Articles/RaceConditions.html#//apple_ref/doc/uid/TP40002585-SW10), as it is unavailable to other users (although it is the same value as seen by all other processes run by the same user).
> 2. This is a more consistent fallback for when `getenv("TMPDIR")` is unavailable, as `$TMPDIR` is usually initialized to the `DARWIN_USER_TEMP_DIR`.
>
> It seems quite unlikely that anybody will break because of this, and I think it falls under the carve-out we have for platform specific behavior: https://doc.rust-lang.org/nightly/std/io/index.html#platform-specific-behavior.

Closes https://github.com/rust-lang/rust/issues/99608.
Closes https://github.com/rust-lang/rust/pull/100824.

``@rustbot`` label O-apple T-libs-api

r? Dylan-DPC
2024-11-23 20:19:52 +08:00
Michael Goulet
7b3e593fb1
Rollup merge of #133264 - lolbinarycat:os-string-truncate, r=joboet
implement OsString::truncate

part of #133262
2024-11-22 21:07:41 -05:00
Henry Jiang
c31a097d75 aix: create shim for lgammaf_r 2024-11-22 17:47:15 -05:00
许杰友 Jieyou Xu (Joe)
874cf85674
Rollup merge of #133337 - ColinFinck:thread-scoped-fix-typo, r=joboet
Fix typo in `std:🧵:Scope::spawn` documentation.

Just a simple fix for a typo that caught my attention.
2024-11-22 20:32:38 +08:00
许杰友 Jieyou Xu (Joe)
bbc4cbe3e2
Rollup merge of #133330 - RalfJung:close, r=the8472
library: update comment around close()

r? `@the8472`
2024-11-22 20:32:38 +08:00
许杰友 Jieyou Xu (Joe)
b8453c9023
Rollup merge of #133313 - thesummer:fix-arc4random, r=cuviper
Use arc4random of libc for RTEMS target

Switch to the `arc4random` from libc. It is available since libc 0.2.162
2024-11-22 20:32:36 +08:00
许杰友 Jieyou Xu (Joe)
9eb67bb25c
Rollup merge of #133238 - heiher:loong-stdarch-rexport, r=Amanieu
re-export `is_loongarch_feature_detected`

r? ``@Amanieu``
2024-11-22 20:32:34 +08:00
Colin Finck
d0384f3ba5
Fix typo in std:🧵:Scope::spawn documentation. 2024-11-22 11:51:38 +01:00
Ralf Jung
729d3aa0fe library: update comment around close() 2024-11-22 08:43:51 +01:00
Mads Marquart
f98d9dd334 Don't try to use confstr in Miri 2024-11-22 07:59:51 +01:00
Jan Sommer
a4a06b305d Use arc4random of libc for RTEMS target
Is available since libc 0.2.162
2024-11-21 23:10:19 +01:00
Panagiotis "Ivory" Vasilopoulos
197bba5a2e Mention that std::fs::remove_dir_all fails on files
This is explicitly mentioned for std::fs::remove_file's documentation,
but not in the aforementioned function.

It is more likely for a slightly lazy programmer to believe that
removing a file would work and that they do not have to distinguish
between directories (with contents) and files themself, because of the
function's recursive nature and how it distinguishes between files and
directories when removing them.
2024-11-21 17:18:39 +01:00
Matthias Krüger
61878ec254
Rollup merge of #131736 - hoodmane:emscripten-wasm-bigint, r=workingjubilee
Emscripten: link with -sWASM_BIGINT

When linking an executable without dynamic linking, this is a pure improvement. It significantly reduces code size and avoids a lot of buggy behaviors. It is supported in all browsers for many years and in all maintained versions of Node.

It does change the ABI, so people who are dynamically linking with a library or executable that uses the old ABI may need to turn it off. It can be disabled if needed by passing `-Clink-arg -sWASM_BIGINT=0` to `rustc`. But few people will want to turn it off.

Note this includes a libc bump to 0.2.162!
2024-11-21 07:56:11 +01:00
binarycat
7e79f91390 implement OsString::truncate 2024-11-20 15:16:05 -06:00
Matthias Krüger
71d3c7790f
Rollup merge of #130800 - bjoernager:const-mut-cursor, r=joshtriplett
Mark `get_mut` and `set_position` in `std::io::Cursor` as const.

Relevant tracking issue: #130801

The methods `get_mut` and `set_position` can trivially be marked as const due to #57349 being stabilised.
2024-11-20 20:10:12 +01:00
Matthias Krüger
0576cc987b
Rollup merge of #129838 - Ayush1325:uefi-process-args, r=joboet
uefi: process: Add args support

- Wrap all args with quotes.
- Escape ^ and " inside quotes using ^.
- Doing reverse of arg parsing: d571ae851d/library/std/src/sys/pal/uefi/args.rs (L81)

 r​? joboet
2024-11-20 20:10:11 +01:00
WANG Rui
37224817d7 re-export is_loongarch_feature_detected 2024-11-20 18:38:22 +08:00
Zachary S
2d2225950f UniqueRc: platform-specific AsFd/Handle/etc impls to mirror Rc 2024-11-19 16:25:54 -06:00
Matthias Krüger
d5dca43df6
Rollup merge of #133183 - n0toose:improve-remove-dir-docs, r=joboet
Mention std::fs::remove_dir_all in std::fs::remove_dir
2024-11-19 22:24:45 +01:00
Matthias Krüger
6c127f3ffd
Rollup merge of #125405 - m-ou-se:thread-add-spawn-hook, r=WaffleLapkin
Add std:🧵:add_spawn_hook.

Implementation of https://github.com/rust-lang/rfcs/pull/3642
2024-11-19 22:24:44 +01:00
Mara Bos
691796be03 Update doc comments for spawn hook. 2024-11-19 18:55:52 +01:00
Mara Bos
b96f023dbd Address review comments.
Co-authored-by: waffle <waffle.lapkin@gmail.com>
2024-11-19 18:55:52 +01:00
Mara Bos
38b9a448c9 Fix tracking issue. 2024-11-19 18:54:21 +01:00
Mara Bos
24fec0d896 Add tracking issue. 2024-11-19 18:54:21 +01:00
Mara Bos
5a80b48fe1 Use Send + Sync for spawn hooks. 2024-11-19 18:54:20 +01:00
Mara Bos
f2bf9e198e Add thread Builder::no_hooks(). 2024-11-19 18:54:20 +01:00
Mara Bos
947354fbec Update thread spawn hooks.
1. Make the effect thread local.
2. Don't return a io::Result from hooks.
2024-11-19 18:54:20 +01:00
Mara Bos
ef9055f3ee Use add_spawn_hook for libtest's output capturing. 2024-11-19 18:54:20 +01:00
Mara Bos
7ac4c04731 Add std:🧵:add_spawn_hook. 2024-11-19 18:54:20 +01:00
bors
78993684f2 Auto merge of #133205 - matthiaskrgr:rollup-xhhhp5u, r=matthiaskrgr
Rollup of 4 pull requests

Successful merges:

 - #131081 (Use `ConstArgKind::Path` for all single-segment paths, not just params under `min_generic_const_args`)
 - #132577 (Report the `unexpected_cfgs` lint in external macros)
 - #133023 (Merge `-Zhir-stats` into `-Zinput-stats`)
 - #133200 (ignore an occasionally-failing test in Miri)

r? `@ghost`
`@rustbot` modify labels: rollup
2024-11-19 16:31:58 +00:00
Ralf Jung
7931a8ddef ignore an occasionally-failing test in Miri 2024-11-19 08:03:16 +01:00
León Orell Valerian Liehr
22265415c4
Rollup merge of #132758 - nnethercote:improve-get_key_value-docs, r=cuviper
Improve `{BTreeMap,HashMap}::get_key_value` docs.

They are unusual methods. The docs don't really describe the cases when they might be useful (as opposed to just `get`), and the examples don't demonstrate the interesting cases at all.

This commit improves the docs and the examples.
2024-11-19 04:01:28 +01:00
Panagiotis "Ivory" Vasilopoulos
7bffa31042 Mention std::fs::remove_dir_all in std::fs::remove_dir 2024-11-18 23:34:59 +01:00
Piotr Osiewicz
529aae6fc3 wasi/fs: Improve stopping condition for <ReadDir as Iterator>::next
When upgrading [Zed](https://github.com/zed-industries/zed/pull/19349) to Rust 1.82 I've encountered a test failure in our test suite. Specifically, one of our extension tests started hanging. I've tracked it down to a call to std::fs::remove_dir_all not returning when an extension is compiled with Rust 1.82
Our extension system uses WASM components, thus I've looked at the diff between 1.81 and 1.82 with respect to WASI and found 736f773844

As it turned out, calling remove_dir_all from extension returned io::ErrorKind::NotFound in 1.81;
the underlying issue is that the ReadDir iterator never actually terminates iteration, however since it loops around, with 1.81 we'd come across an entry second time and fail to remove it, since it would've been removed previously.
With 1.82 and 736f773844 it is no longer the case, thus we're seeing the hang.

This commit makes ReadDir::next adhere to readdir contract, namely it will no longer call readdir once the returned # of bytes is smaller than the size of a passed-in buffer.
Previously we'd only terminate the loop if readdir returned 0.
2024-11-18 19:19:14 +01:00
joboet
5a856b82f3
std: allow after-main use of synchronization primitives
By creating an unnamed thread handle when the actual one has already been destroyed, synchronization primitives using thread parking can be used even outside the Rust runtime.

This also fixes an inefficiency in the queue-based `RwLock`: if `thread::current` was not initialized yet, it will create a new handle on every parking attempt without initializing `thread::current`. The private `current_or_unnamed` function introduced here fixes this.
2024-11-18 17:55:36 +01:00
bors
c602e9aeaa Auto merge of #133160 - jhpratt:rollup-wzj9q15, r=jhpratt
Rollup of 4 pull requests

Successful merges:

 - #132934 (Overhaul the `-l` option parser (for linking to native libs))
 - #133142 (rename rustc_const_stable_intrinsic -> rustc_intrinsic_const_stable_indirect)
 - #133145 (Document alternatives to `static mut`)
 - #133158 (Subtree update of `rust-analyzer`)

r? `@ghost`
`@rustbot` modify labels: rollup
2024-11-18 12:46:07 +00:00
bors
e83c45a98b Auto merge of #128219 - connortsui20:rwlock-downgrade, r=tgross35
Rwlock downgrade

Tracking Issue: #128203

This PR adds a `downgrade` method for `RwLock` / `RwLockWriteGuard` on all currently supported platforms.

Outstanding questions:
- [x] ~~Does the `futex.rs` change affect performance at all? It doesn't seem like it will but we can't be certain until we bench it...~~
- [x] ~~Should the SOLID platform implementation [be ported over](https://github.com/rust-lang/rust/pull/128219#discussion_r1693470090) to the `queue.rs` implementation to allow it to support downgrades?~~
2024-11-18 07:24:12 +00:00
Nicholas Nethercote
2765432d32 Improve {BTreeMap,HashMap}::get_key_value docs.
They are unusual methods. The docs don't really describe the cases when
they might be useful (as opposed to just `get`), and the examples don't
demonstrate the interesting cases at all.

This commit improves the docs and the examples.
2024-11-18 16:53:12 +11:00
Kornel
8b43a7ee5d
Document alternatives to static mut 2024-11-18 00:34:06 +00:00
Connor Tsui
fc52cdd9a8 reduce threads in downgrade test 2024-11-16 12:31:14 -05:00
Connor Tsui
782b07e1ff fix DOWNGRADED bit unpreserved
Co-authored-by: Jonas Böttiger <jonasboettiger@icloud.com>
2024-11-16 12:31:14 -05:00
Connor Tsui
84fd95cbed fix memory ordering bug + bad test
This commit fixes a memory ordering bug in the futex implementation
(`Relaxed` -> `Release` on `downgrade`).

This commit also removes a badly written test that deadlocked and
replaces it with a more reasonable test based on an already-tested
`downgrade` test from the parking-lot crate.
2024-11-16 12:31:14 -05:00
Connor Tsui
3d191b50d2 add safety comments for queue implementation 2024-11-16 12:31:13 -05:00
Connor Tsui
26b5a1485e add downgrade to queue implementation
This commit adds the `downgrade` method onto the inner `RwLock` queue
implementation.

There are also a few other style patches included in this commit.

Co-authored-by: Jonas Böttiger <jonasboettiger@icloud.com>
2024-11-16 12:31:13 -05:00
Connor Tsui
31e35c2131 modify queue implementation documentation
This commit only has documentation changes and a few things moved around
the file. The very few code changes are cosmetic: changes like turning a
`match` statement into an `if let` statement or reducing indentation for
long if statements.

This commit also adds several safety comments on top of `unsafe` blocks
that might not be immediately obvious to a first-time reader.

Code "changes" are in:
- `add_backlinks_and_find_tail`
- `lock_contended`

A majority of the changes are just expanding the comments from 80
columns to 100 columns.
2024-11-16 12:31:13 -05:00
Connor Tsui
fa9f04af5d add downgrade to futex implementation 2024-11-16 12:31:13 -05:00
Connor Tsui
3336ae0838 add simple downgrade implementations 2024-11-16 12:31:13 -05:00
Connor Tsui
f71ecc48cc add downgrade method onto RwLockWriteGuard 2024-11-16 12:31:13 -05:00
Connor Tsui
b683e1dc13 add RwLock downgrade tests 2024-11-16 12:31:13 -05:00
Jubilee
a5510a5430
Rollup merge of #132984 - sunshowers:pipe2, r=tgross35
[illumos] use pipe2 to create anonymous pipes

pipe2 allows the newly-created pipe to atomically be CLOEXEC.

pipe2 was added to illumos a long time ago:
5dbfd19ad5. I've verified that this change passes all of std's tests on illumos.
2024-11-14 17:55:25 -08:00
Jubilee
3f9f7c4a72
Rollup merge of #132977 - cberner:fix_solaris, r=tgross35
Fix compilation error on Solaris due to flock usage

PR 130999 added the file_lock feature, but libc does not define flock() for the Solaris platform leading to a compilation error.

Additionally, I went through all the Tier 2 platforms and read through their documentation to see whether flock was implemented. This turned up 5 more Unix platforms where flock is not supported, even though it may exist in the libc crate.

Fixes https://github.com/rust-lang/rust/issues/132921

Related to #130999
2024-11-14 17:55:25 -08:00
Jubilee
b1b56b11a2
Rollup merge of #132790 - aDotInTheVoid:ioslice-asslice-rides-again, r=cuviper
Add as_slice/into_slice for IoSlice/IoSliceMut.

ACP: https://github.com/rust-lang/libs-team/issues/93

Tracking issue: #132818

Based on a623c5233ae7f6b540e5c00f2be02f40b33b0793 (CC `@mpdn)` and #111277 (CC `@Lucretiel).`

Closes: #124659

Tracking Issue: TODO

try-job: test-various
try-job: dist-various-1
try-job: dist-various-2

r? libs
2024-11-14 17:55:24 -08:00
Peter Gervai
451c8cdb06 Remove one stray space. 2024-11-14 22:01:13 +01:00
Guillaume Gomez
e6cd8699ea
Rollup merge of #133027 - no1wudi:master, r=jhpratt
Fix a copy-paste issue in the NuttX raw type definition

This file is copied from the rtems as initial implementation, and forgot to change the OS name in the comment.
2024-11-14 18:26:16 +08:00
Huang Qi
79e2af285a Fix a copy-paste issue in the NuttX raw type definition
This file is copied from the rtems as initial implementation, and
forgot to change the OS name in the comment.

Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
2024-11-14 14:50:30 +08:00
Jubilee
17dcadd587
Rollup merge of #133003 - zachs18:clonetouninit-dyn-compat-u8, r=dtolnay
Make `CloneToUninit` dyn-compatible

Make `CloneToUninit` dyn-compatible, by making `clone_to_uninit`'s `dst` parameter `*mut u8` instead of `*mut Self`, so the method does not reference `Self` except in the `self` parameter and is thus dispatchable from a trait object.

This allows, among other things, adding `CloneToUninit` as a supertrait bound for `trait Foo` to allow cloning `dyn Foo` in some containers. Currently, this means that `Rc::make_mut` and `Arc::make_mut` can work with `dyn Foo` where `trait Foo: CloneToUninit`.

<details><summary>Example</summary>

```rs
#![feature(clone_to_uninit)]
use std::clone::CloneToUninit;
use std::rc::Rc;
use std::fmt::Debug;
use std::borrow::BorrowMut;

trait Foo: BorrowMut<u32> + CloneToUninit + Debug {}

impl<T: BorrowMut<u32> + CloneToUninit + Debug> Foo for T {}

fn main() {
    let foo: Rc<dyn Foo> = Rc::new(42_u32);
    let mut bar = foo.clone();
    *Rc::make_mut(&mut bar).borrow_mut() = 37;
    dbg!(foo, bar); // 42, 37
}
```

</details>

Eventually, `Box::<T>::clone` is planned to be converted to use `T::clone_to_uninit`, which when combined with this change, will allow cloning `Box<dyn Foo>` where `trait Foo: CloneToUninit` without any additional `unsafe` code for the author of `trait Foo`.[^1]

This PR should have no stable side-effects, as `CloneToUninit` is unstable so cannot be mentioned on stable, and `CloneToUninit` is not used as a supertrait anywhere in the stdlib.

This change removes some length checks that could only fail if library UB was already hit (e.g. calling `<[T]>::clone_to_uninit` with a too-small-length `dst` is library UB and was previously detected[^2]; since `dst` does not have a length anymore, this now cannot be detected[^3]).

r? libs-api

-----

I chose to make the parameter `*mut u8` instead of `*mut ()` because that might make it simpler to pass the result of `alloc` to `clone_to_uninit`, but `*mut ()` would also make sense, and any `*mut ConcreteType` would *work*. The original motivation for [using specifically `*mut ()`](https://github.com/rust-lang/rust/pull/116113#discussion_r1335303908) appears to be `std::ptr::from_raw_parts_mut`, but that now [takes `*mut impl Thin`](https://doc.rust-lang.org/nightly/std/ptr/fn.from_raw_parts.html) instead of `*mut ()`. I have another branch where the parameter is `*mut ()`, if that is preferred.

It *could* also take something like `&mut [MaybeUninit<u8>]` to be dyn-compatible but still allow size-checking and in some cases safe writing, but this is already an `unsafe` API where misuse is UB, so I'm not sure how many guardrails it's worth adding here, and `&mut [MaybeUninit<u8>]` might be overly cumbersome to construct for callers compared to `*mut u8`

[^1]:  Note that  `impl<T: CloneToUninit + ?Sized> Clone for Box` must be added before or at the same time as when `CloneToUninit` becomes stable, due to `Box` being `#[fundamental]`, as if there is any stable gap between the stabilization of `CloneToUninit` and `impl<T: CloneToUninit + ?Sized> Clone for Box`, then users could implement both `CloneToUninit for dyn LocalTrait` and separately `Clone for Box<dyn LocalTrait>` during that gap, and be broken by the introduction of  `impl<T: CloneToUninit + ?Sized> Clone for Box`.

[^2]: Using a `debug_assert_eq` in [`core::clone::uninit::CopySpec::clone_slice`](https://doc.rust-lang.org/nightly/src/core/clone/uninit.rs.html#28).

[^3]: This PR just uses [the metadata (length) from `self`](e0c1c8bc50/library/core/src/clone.rs (L286)) to construct the `*mut [T]` to pass to `CopySpec::clone_slice` in `<[T]>::clone_to_uninit`.
2024-11-13 22:43:37 -08:00
Jubilee
52913653dd
Rollup merge of #131304 - RalfJung:float-core, r=tgross35
float types: move copysign, abs, signum to libcore

These operations are explicitly specified to act "bitwise", i.e. they just act on the sign bit and do not even quiet signaling NaNs. We also list them as ["non-arithmetic operations"](https://doc.rust-lang.org/nightly/std/primitive.f32.html#nan-bit-patterns), and all the other non-arithmetic operations are in libcore. There's no reason to expect them to require any sort of runtime support, and from [these experiments](https://github.com/rust-lang/rust/issues/50145#issuecomment-997301250) it seems like LLVM indeed compiles them in a way that does not require any sort of runtime support.

Nominating for `@rust-lang/libs-api` since this change takes immediate effect on stable.

Part of https://github.com/rust-lang/rust/issues/50145.
2024-11-13 22:43:35 -08:00
Christopher Berner
0df3ef4435 Fix compilation error on Solaris due to flock usage
PR 130999 added the file_lock feature, but libc does not define
flock() for the Solaris platform leading to a compilation error.

Additionally, I went through all the Tier 2 platforms and read through
their documentation to see whether flock was implemented. This turned up
5 more Unix platforms where flock is not supported, even though it may
exist in the libc crate.
2024-11-13 06:53:19 -08:00
Rain
fb3edb2fc7 [illumos] use pipe2 to create anonymous pipes
pipe2 allows the newly-created pipe to atomically be CLOEXEC.

pipe2 was added to illumos a long time ago:
5dbfd19ad5.
I've verified that this change passes all tests.
2024-11-13 05:48:06 +00:00
Zachary S
e0c1c8bc50 Make CloneToUninit dyn-compatible 2024-11-12 15:08:41 -06:00
Matthias Krüger
0555bb2a1b
Rollup merge of #132869 - lolbinarycat:library-fix-too_long_first_doc_paragraph, r=tgross35
split up the first paragraph of doc comments for better summaries

used `./x clippy -Aclippy::all '-Wclippy::too_long_first_doc_paragraph' library/core library/alloc` to find these issues.
2024-11-12 06:27:19 +01:00
bors
67f21277cd Auto merge of #132919 - matthiaskrgr:rollup-ogghyvp, r=matthiaskrgr
Rollup of 7 pull requests

Successful merges:

 - #120077 (Add Set entry API )
 - #132144 (Arbitrary self types v2: (unused) Receiver trait)
 - #132297 (Document some `check_expr` methods, and other misc `hir_typeck` tweaks)
 - #132820 (Add a default implementation for CodegenBackend::link)
 - #132881 (triagebot: Autolabel rustdoc book)
 - #132912 (Simplify some places that deal with generic parameter defaults)
 - #132916 (Unvacation fmease)

r? `@ghost`
`@rustbot` modify labels: rollup
2024-11-12 02:51:21 +00:00
xmh0511
9517769986
a release operation synchronizes with an acquire operation 2024-11-12 09:46:41 +08:00
Matthias Krüger
3ab4477ba7
Rollup merge of #120077 - SUPERCILEX:set-entry, r=Amanieu
Add Set entry API

See https://rust-lang.zulipchat.com/#narrow/stream/219381-t-libs/topic/HashSet.3A.3Aentry/near/413224639 and https://github.com/rust-lang/rust/issues/60896#issuecomment-678708111

Closes https://github.com/rust-lang/rfcs/issues/1490
2024-11-11 21:58:28 +01:00
Hood Chatham
b071f6405c Emscripten: link with -sWASM_BIGINT
When linking an executable without dynamic linking, this is a pure improvement.
It significantly reduces code size and avoids a lot of buggy behaviors. It is
supported in all browsers for many years and in all maintained versions of
Node.

It does change the ABI, so people who are dynamically linking with a library
or executable that uses the old ABI may need to turn it off. It can be disabled
if needed by passing `-Clink-arg -sWASM_BIGINT=0` to `rustc`. But few people
will want to turn it off.
2024-11-11 17:25:50 +01:00
Matthias Krüger
95175f851e
Rollup merge of #130999 - cberner:flock_pr, r=joboet
Implement file_lock feature

This adds lock(), lock_shared(), try_lock(), try_lock_shared(), and unlock() to File gated behind the file_lock feature flag

This is the initial implementation of https://github.com/rust-lang/rust/issues/130994 for Unix and Windows platforms. I will follow it up with an implementation for WASI preview 2
2024-11-11 15:23:33 +01:00
binarycat
ae3c68db34 split up the first paragraph of doc comments for better summaries 2024-11-10 13:22:58 -06:00
Alona Enraght-Moony
c496af64ed Add as_slice/into_slice for IoSlice/IoSliceMut.
Co-authored-by: Mike Pedersen <mike@mikepedersen.dk>
Co-authored-by: Nathan West <Lucretiel@gmail.com>
2024-11-09 18:52:29 +00:00
Jubilee
dc647392d6
Rollup merge of #132778 - lolbinarycat:io-Error-into_inner-docs, r=cuviper
update io::Error::into_inner to acknowledge io::Error::other
2024-11-08 20:46:13 -08:00
binarycat
b004cac72e update io::Error::into_inner to acknowlage io::Error::other 2024-11-08 10:43:34 -06:00
Christopher Berner
9330786c27 Address review comments 2024-11-08 08:16:41 -08:00
Christopher Berner
5a156a7999
Update library/std/src/sys/pal/windows/fs.rs
Co-authored-by: Jonas Böttiger <jonasboettiger@icloud.com>
2024-11-08 08:09:53 -08:00
Stuart Cook
4b904ceb46
Rollup merge of #132738 - cuviper:channel-heap-init, r=ibraheemdev
Initialize channel `Block`s directly on the heap

The channel's `Block::new` was causing a stack overflow because it held
32 item slots, instantiated on the stack before moving to `Box::new`.
The 32x multiplier made modestly-large item sizes untenable.

That block is now initialized directly on the heap.

Fixes #102246

try-job: test-various
2024-11-08 18:51:30 +11:00
Jubilee
c9009ae8c8
Rollup merge of #132696 - fortanix:raoul/rte-235-fix_fmodl_missing_symbol_issue, r=tgross35
Compile `test_num_f128` conditionally on `reliable_f128_math` config

With #132434 merged, our internal SGX CI started failing with:
```
05:27:34   = note: rust-lld: error: undefined symbol: fmodl
05:27:34           >>> referenced by arith.rs:617 (core/src/ops/arith.rs:617)
05:27:34           >>>               /home/jenkins/workspace/rust-sgx-ci/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-fortanix-unknown-sgx/release/deps/std-5d5f11eb008c9091.std.d8141acc61ab7ac8-cgu.10.rcgu.o:(std::num::test_num::h7dd9449f6c01fde8)
05:27:34           >>> did you mean: fmodf
05:27:34           >>> defined in: /home/jenkins/workspace/rust-sgx-ci/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-fortanix-unknown-sgx/release/deps/libcompiler_builtins-0376f439a2ebf305.rlib(compiler_builtins-0376f439a2ebf305.compiler_builtins.c22db39d25d6f802-cgu.148.rcgu.o)
```
This originated from the `test_num_f128` test not having the required conditional compilation. This PR fixes that issue.

cc: ````@jethrogb,```` ````@workingjubilee````
2024-11-07 18:48:23 -08:00
Josh Stone
03383ad102 Initialize channel Blocks directly on the heap
The channel's `Block::new` was causing a stack overflow because it held
32 item slots, instantiated on the stack before moving to `Box::new`.
The 32x multiplier made modestly-large item sizes untenable.

That block is now initialized directly on the heap.

Fixes #102246
2024-11-07 10:09:45 -08:00
bors
9a77c3c2cb Auto merge of #132714 - mati865:update-memchr, r=tgross35
unpin and update memchr

I'm unable to build x86_64-pc-windows-gnu Rust due to some weird binutils bug, but thinlto issue seems to be no longer present. Let's give it a go on the CI.
Possibly fixed by https://github.com/rust-lang/rust/pull/129079

Fixes #127890
2024-11-07 15:34:14 +00:00
Jonas Böttiger
0a0cadfe8a
Rollup merge of #132715 - tabokie:fix-lazy-lock-doc, r=Noratrieb
fix `LazyLock::get` and `LazyLock::get_mut` document
2024-11-07 13:08:29 +01:00
Raoul Strackx
072088074e Separate f128 % operation to deal with missing fmodl symbol 2024-11-07 11:33:10 +01:00
Xinye
557c7f8cdd fix lazylock comment
Signed-off-by: Xinye <xinye.tao@metabit-trading.com>
2024-11-07 10:51:00 +08:00
bors
775f6d8d9d Auto merge of #131888 - ChrisDenton:deopt, r=ibraheemdev
Revert using `HEAP` static in Windows alloc

Fixes #131468

This does the minimum to remove the `HEAP` static that was causing chromium issues. It would be worth having a more substantial look at this module but for now I think this addresses the immediate issue.

cc `@danakj`
2024-11-07 01:23:47 +00:00
Mateusz Mikuła
7cdbb59c26 unpin and update memchr 2024-11-07 02:09:39 +01:00
Guillaume Gomez
d6a43d4724
Rollup merge of #132617 - uellenberg:fix-rendered-doc, r=cuviper
Fix an extra newline in rendered std doc

Fixes #132564

![17308581942254367500907812250579](https://github.com/user-attachments/assets/9e946c49-c0a6-40ba-ab69-b80fe0e085e1)
(taken from the issue above)

The problem with the formatting is due to that newline between `<code>` and `<svg>`. Any newlines outside of the code (i.e., within elements inside of it) are fine.
2024-11-07 02:09:51 +08:00
uellenberg
934be9b63b Change some code blocks to quotes in rendered std doc
Fixes #132564
2024-11-05 16:11:47 -08:00
NotWearingPants
107b4fdba2
docs: fix grammar in doc comment at unix/process.rs 2024-11-04 20:42:21 +02:00
Michael Goulet
98b6e01c0d Add AsyncFn* to to the prelude in all editions 2024-11-04 17:50:29 +00:00
bors
706eec8ce1 Auto merge of #132434 - tgross35:f128-tests, r=workingjubilee
Update `compiler-builtins` and enable f128 tests on all non-buggy platforms

Update compiler_builtins to 0.1.138 and pin it. This updates to a new version of builtins that includes [1], which was
the last blocker to us enabling `f128` tests on all platforms.

With that, we now provide symbols necessary to work with `f128` everywhere. This means that we are no longer restricted to systems that provide `f128` symbols themselves, and can enable tests by default.

There are still a handful of platforms that need to remain disabled because of bugs and some that had to get updated.

Math support is still off by default since those symbols are not yet available.

[1]: https://github.com/rust-lang/compiler-builtins/pull/624

try-job: test-various
try-job: i686-gnu-nopt
2024-11-04 04:03:29 +00:00
Kornel
4b7f56ac9d
Fix and undeprecate home_dir() 2024-11-04 03:06:09 +00:00
Trevor Gross
c0fc25cc20 Enable f128 tests on all non-buggy platforms 🎉
With the `compiler-builtins` update to 0.1.137 [1], we now provide
symbols necessary to work with `f128` everywhere. This means that we are
no longer restricted to 64-bit linux, and can enable tests by default.

There are still a handful of platforms that need to remain disabled
because of bugs. This patch additionally disables the following:

1. MIPS [2]
2. 32-bit x86 [3]

Math support is still off by default since those symbols are not yet
available.

[1]: https://github.com/rust-lang/rust/pull/132433
[2]: https://github.com/llvm/llvm-project/issues/96432
[3]: https://github.com/llvm/llvm-project/issues/77401
2024-11-03 19:33:04 -06:00
Trevor Gross
95ecf0c262 Update compiler_builtins to 0.1.138 and pin it
This updates to a new version of builtins that includes [1], which was
the last blocker to us enabling `f128` tests on all platforms 🎉.

With this update, also change to pinning the version with `=` rather
than using the default carat versioning. This is meant to ensure that
`compiler-builtins` does not get updated as part of the weekly
`Cargo.lock` update, since updates to this crate need to be intentional:
changes to rust-lang/rust and rust-lang/compiler-builtins sometimes need
to be kept in lockstep, unlike most dependencies, and sometimes these
updates can be problematic.

[1]: https://github.com/rust-lang/compiler-builtins/pull/624
2024-11-03 17:43:16 -06:00
bors
42188c3ca8 Auto merge of #123723 - madsmtm:apple-std-os, r=dtolnay
Make `std::os::darwin` public

I'm not sure of the reasoning behind them not being public before, but I think they should be, just like `std::os::ios` and `std::os::macos` are public.

Additionally, I've merged their source code, as it was otherwise just a bunch of unnecessary duplication.

Ultimately, I've done this PR to fix `./x build library --target=aarch64-apple-tvos,aarch64-apple-watchos,aarch64-apple-visionos`, as that currently fails because of dead code warnings.

Since you reviewed https://github.com/rust-lang/rust/pull/121419
r? davidtwco

Fixes https://github.com/rust-lang/rust/issues/121640.

`@rustbot` label O-tvos O-watchos O-visionos
2024-11-03 22:25:11 +00:00
Matthias Krüger
e9379382f9
Rollup merge of #132503 - RalfJung:const-hash-map, r=Amanieu
better test for const HashMap; remove const_hash leftovers

The existing `const_with_hasher` test is kind of silly since the HashMap it constructs can never contain any elements. So this adjusts the test to construct a usable HashMap, which is a bit non-trivial since the default hash builder cannot be built in `const`. `BuildHasherDefault::new()` helps but is unstable (https://github.com/rust-lang/rust/issues/123197), so we also have a test that does not involve that type.

The second commit removes the last remnants of https://github.com/rust-lang/rust/issues/104061, since they aren't actually useful -- without const traits, you can't do any hashing in `const`.

Cc ``@rust-lang/libs-api`` ``@rust-lang/wg-const-eval``
Closes #104061
Related to https://github.com/rust-lang/rust/issues/102575
2024-11-03 12:08:52 +01:00
Matthias Krüger
957f6c3973
Rollup merge of #129329 - eduardosm:rc-from-mut-slice, r=dtolnay
Implement `From<&mut {slice}>` for `Box/Rc/Arc<{slice}>`

ACP: https://github.com/rust-lang/libs-team/issues/424

New API:

```rust
impl<T: Clone> From<&mut [T]> for Box<[T]>
impl From<&mut str> for Box<str>
impl From<&mut CStr> for Box<CStr>
impl From<&mut OsStr> for Box<OsStr>
impl From<&mut Path> for Box<Path>

impl<T: Clone> From<&mut [T]> for Rc<[T]>
impl From<&mut str> for Rc<str>
impl From<&mut CStr> for Rc<CStr>
impl From<&mut OsStr> for Rc<OsStr>
impl From<&mut Path> for Rc<Path>

impl<T: Clone> From<&mut [T]> for Arc<[T]>
impl From<&mut str> for Arc<str>
impl From<&mut CStr> for Arc<CStr>
impl From<&mut OsStr> for Arc<OsStr>
impl From<&mut Path> for Arc<Path>
```

Since they are trait implementations, I think these are insta-stable.

As mentioned in https://github.com/rust-lang/libs-team/issues/424#issuecomment-2299415749, a crater run might be needed.
2024-11-03 12:08:49 +01:00
Alex Saveau
33f500d52b Add Set entry API
Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>
2024-11-02 15:13:23 -04:00
Matthias Krüger
c4024585a4
Rollup merge of #132495 - Houtamelo:remove_unintended_link, r=jieyouxu
Remove unintended link

Since `#[link_section]` is enclosed in braces, it was being confused with a link during docs compilation.

This caused compilation to fail when running `x dist` since it emitted a warning regarding broken links.
2024-11-02 12:14:15 +01:00
Matthias Krüger
52ff41ccaa
Rollup merge of #132493 - Houtamelo:doc_type-ref_html-tag, r=jieyouxu
Fix type reference in documents which was being confused with html tags.

Running `x dist` was failing due to it invoking commands with `-D warnings`, which emitted a warning about unclosed html tags.
2024-11-02 12:14:13 +01:00
Ralf Jung
52666238cf remove const_hash feature leftovers 2024-11-02 11:27:14 +01:00
Ralf Jung
34432f7494 const_with_hasher test: actually construct a usable HashMap 2024-11-02 11:27:14 +01:00
Houtamelo
102fac7af6
Remove unintended link
Since `#[link_section]` is enclosed in braces, it was being confused with a link during docs compilation.
2024-11-02 04:09:17 -03:00
Houtamelo
1acb1043fe
Fix type reference in documents which was being confused with html tags. 2024-11-02 04:02:32 -03:00
Lukas Markeffsky
2a6a70606d fix some stability annotations 2024-11-02 01:37:45 +01:00
Ralf Jung
e8dfe6e4f2 float types: move copysign, abs, signum to libcore 2024-11-01 16:47:18 +01:00
bors
24254efb43 Auto merge of #132206 - tgross35:update-builtins, r=wesleywiser
Update compiler-builtins to 0.1.136

This includes:

* The license change https://github.com/rust-lang/compiler-builtins/pull/717
* The `libm` submodule update, which also has a license change https://github.com/rust-lang/libm/pull/317
* Re-enabling `math` on i686 UEFI https://github.com/rust-lang/compiler-builtins/pull/715

Fixes: https://github.com/rust-lang/rust/issues/128533
2024-10-31 23:31:48 +00:00
Eduardo Sánchez Muñoz
9fe9041cc8 Implement From<&mut {slice}> for Box/Rc/Arc<{slice}> 2024-10-29 21:24:12 +01:00
Matthias Krüger
07afe8d12f
Rollup merge of #132321 - betrusted-io:xous/fix-rustc_const_stable-attribute, r=joboet
xous: sync: remove `rustc_const_stable` attribute on Condvar and Mutex new()

These functions had `#[rustc_const_stable(feature = "const_locks", since = "1.63.0")]` on them because they were originally taken from `no_threads`. with d066dfd these no longer compile. Since other platforms do not have this attribute, remove it. This fixes the build for Xous.
2024-10-29 18:39:00 +01:00
Sean Cross
59944c9c9f xous: sync: remove rustc_const_stable attribute
These functions had `#[rustc_const_stable(feature = "const_locks", since
= "1.63.0")]` on them because they were originally taken from
`no_threads`. with d066dfd these no longer compile. Since other
platforms do not have this attribute, remove it. This fixes the build
for Xous.

Signed-off-by: Sean Cross <sean@xobs.io>
2024-10-29 22:43:46 +08:00
George Tokmaji
bfadeeb45c Win: rename: Use offset_of! in struct size calculation 2024-10-29 14:14:06 +01:00
Jubilee
29a7ca993d
Rollup merge of #132270 - yakiimoninja:fs-truncate-docs, r=Noratrieb
clarified doc for `std::fs::OpenOptions.truncate()`

Clarified what method does when `std::fs::OpenOptions.truncate()` parameter is set to `true`.
2024-10-29 03:11:43 -07:00
yakiimoninja
5910a4f1bc
clarified std::fs truncate doc
Co-authored-by: nora <48135649+Noratrieb@users.noreply.github.com>
2024-10-28 17:14:15 +00:00
bors
3f1be1ec7e Auto merge of #132145 - RalfJung:stdarch, r=Amanieu
bump stdarch

This lets us remove a hack from https://github.com/rust-lang/rust/pull/131349.

r? `@Amanieu`

try-job: test-various
2024-10-28 16:25:56 +00:00