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* the logic only checked for / but not for \
* verbatim paths shouldn't skip items at all since they don't get normalized
* the extra branches get optimized out on unix since is_sep_byte is a trivial comparison and is_verbatim is always-false
* tests lacked windows coverage for these cases
That lead to equal paths not having equal hashes and to unnecessary collisions.
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r=joshtriplett
Implement stabilization of `#[feature(available_parallelism)]`
Stabilized in https://github.com/rust-lang/rust/issues/74479#issuecomment-984379800. Closes https://github.com/rust-lang/rust/issues/74479. Thanks!
cc/ ``@rust-lang/libs-api``
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Previously suggested in https://github.com/rust-lang/rfcs/issues/2854.
It makes sense to have this since `char` implements `From<u8>`. Likewise
`u32`, `u64`, and `u128` (since #79502) implement `From<char>`.
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Fix a pair of mistyped test cases in `std::net::ip`
These two test cases are not consistent with their comments, which I believe is unintended.
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Rollup of 7 pull requests
Successful merges:
- #92092 (Drop guards in slice sorting derive src pointers from &mut T, which is invalidated by interior mutation in comparison)
- #92388 (Fix a minor mistake in `String::try_reserve_exact` examples)
- #92442 (Add negative `impl` for `Ord`, `PartialOrd` on `LocalDefId`)
- #92483 (Stabilize `result_cloned` and `result_copied`)
- #92574 (Add RISC-V detection macro and more architecture instructions)
- #92575 (ast: Always keep a `NodeId` in `ast::Crate`)
- #92583 (:arrow_up: rust-analyzer)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Explicitly pass `PATH` to the Windows exe resolver
This allows for testing different `PATH`s without using the actual environment.
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Update library/core/src/hint.rs
Co-authored-by: Amanieu d'Antras <amanieu@gmail.com>
Remove redundant config gate
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intra-doc: Make `Receiver::into_iter` into a clickable link
The documentation on `std::sync::mpsc::Iter` and `std::sync::mpsc::TryIter` provides links to the corresponding `Receiver` methods, unlike `std::sync::mpsc::IntoIter` does.
This was left out in c59b188aaeadea32625534250d1f5120420be000
Related to #29377
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Make the documentation of builtin macro attributes accessible
`use ::std::prelude::v1::derive;` compiles on stable, so, AFAIK, there is no reason to have it be `#[doc(hidden)]`.
- What it currently looks like for things such as `#[test]`, `#[derive]`, `#[global_allocator]`: https://doc.rust-lang.org/1.57.0/core/prelude/v1/index.html#:~:text=Experimental-,pub,-use%20crate%3A%3Amacros%3A%3Abuiltin%3A%3Aglobal_allocator
<img width="767" alt="Screen Shot 2021-12-31 at 17 49 46" src="https://user-images.githubusercontent.com/9920355/147832999-cbd747a6-4607-4df6-8e57-c1675dcbc1c3.png">
and in `::std` they're just straight `hidden`.
<img width="452" alt="Screen Shot 2021-12-31 at 17 53 18" src="https://user-images.githubusercontent.com/9920355/147833105-c5ff8cd1-9e4d-4d2b-9621-b36aa3cfcb28.png">
- Here is how it looks like with this PR (assuming the `Rustc{De,En}codable` ones are not reverted):
<img width="778" alt="Screen Shot 2021-12-31 at 17 50 55" src="https://user-images.githubusercontent.com/9920355/147833034-84286342-dbf7-4e6e-9062-f39cd6c286a4.png">
<img width="291" alt="Screen Shot 2021-12-31 at 17 52 54" src="https://user-images.githubusercontent.com/9920355/147833109-c92ed55c-51c6-40a2-9205-f834d1e349c0.png">
Since this involves doc people to chime in, and since `jyn` is on vacation, I'll cc `@GuillaumeGomez` and tag the `rustdoc` team as well
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r=Mark-Simulacrum
Modifications to `std::io::Stdin` on Windows so that there is no longer a 4-byte buffer minimum in read().
This is an attempted fix of issue #91722, where a too-small buffer was passed to the read function of stdio on Windows. This caused an error to be returned when `read_to_end` or `read_to_string` were called. Both delegate to `std::io::default_read_to_end`, which creates a buffer that is of length >0, and forwards it to `std::io::Stdin::read()`. The latter method returns an error if the length of the buffer is less than 4, as there might not be enough space to allocate a UTF-16 character. This creates a problem when the buffer length is in `0 < N < 4`, causing the bug.
The current modification creates an internal buffer, much like the one used for the write functions
I'd also like to acknowledge the help of ``@agausmann`` and ``@hkratz`` in detecting and isolating the bug, and for suggestions that made the fix possible.
Couple disclaimers:
- Firstly, I didn't know where to put code to replicate the bug found in the issue. It would probably be wise to add that case to the testing suite, but I'm afraid that I don't know _where_ that test should be added.
- Secondly, the code is fairly fundamental to IO operations, so my fears are that this may cause some undesired side effects ~or performance loss in benchmarks.~ The testing suite runs on my computer, and it does fix the issue noted in #91722.
- Thirdly, I left the "surrogate" field in the Stdin struct, but from a cursory glance, it seems to be serving the same purpose for other functions. Perhaps merging the two would be appropriate.
Finally, this is my first pull request to the rust language, and as such some things may be weird/unidiomatic/plain out bad. If there are any obvious improvements I could do to the code, or any other suggestions, I would appreciate them.
Edit: Closes #91722
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- Do not `#[doc(hidden)]` the `#[derive]` macro attribute
- Add a link to the reference section to `derive`'s inherent docs
- Do the same for `#[test]` and `#[global_allocator]`
- Fix `GlobalAlloc` link (why is it on `core` and not `alloc`?)
- Try `no_inline`-ing the `std` reexports from `core`
- Revert "Try `no_inline`-ing the `std` reexports from `core`"
- Address PR review
- Also document the unstable macros
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The documentation on `std::sync::mpsc::Iter` and `std::sync::mpsc::TryIter` provides links to the corresponding `Receiver` methods, unlike `std::sync::mpsc::IntoIter` does.
This was left out in c59b188aaeadea32625534250d1f5120420be000
Related to #29377
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Rollup of 7 pull requests
Successful merges:
- #84083 (Clarify the guarantees that ThreadId does and doesn't make.)
- #91593 (Remove unnecessary bounds for some Hash{Map,Set} methods)
- #92297 (Reduce compile time of rustbuild)
- #92332 (Add test for where clause order)
- #92438 (Enforce formatting for rustc_codegen_cranelift)
- #92463 (Remove pronunciation guide from Vec<T>)
- #92468 (Emit an error for `--cfg=)`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Remove unnecessary bounds for some Hash{Map,Set} methods
This PR moves `HashMap::{into_keys,into_values,retain}` and `HashSet::retain` from `impl` blocks with `K: Eq + Hash, S: BuildHasher` into the blocks without them. It doesn't seem to me there is any reason these methods need to be bounded by that. This change brings `HashMap::{into_keys,into_values}` on par with `HashMap::{keys,values,values_mut}` which are not bounded either.
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Clarify the guarantees that ThreadId does and doesn't make.
The existing documentation does not spell out whether `ThreadId`s are unique during the lifetime of a thread or of a process. I had to examine the source code to realise (pleasingly!) that they're unique for the lifetime of a process. That seems worth documenting clearly, as it's a strong guarantee.
Examining the way `ThreadId`s are created also made me realise that the `as_u64` method on `ThreadId` could be a trap for the unwary on those platforms where the platform's notion of a thread identifier is also a 64 bit integer (particularly if they happen to use a similar identifier scheme to `ThreadId`). I therefore think it's worth being even clearer that there's no relationship between the two.
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Remove CommandEnv::apply
It's not being used and uses unsound set_var and remove_var functions. This is an internal function that isn't exported (even with `process_internals` feature), so this shouldn't break anything.
Also see #92365. Note that this isn't the only use of those methods in standard library, so that particular pull request will need more changes than just this to work (in particular, `test_capture_env_at_spawn` is using `set_var` and `remove_var`).
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Remove existing problematic cases.
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It appears `find_max_slow` comes from the BinaryHeap docs, where the
try_reserve example is a slow implementation of find_max. It has no
relevance to this code in OsString though.
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It's not being used and uses unsound set_var and remove_var
functions.
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Signed-off-by: Xuanwo <github@xuanwo.io>
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Co-authored-by: David Tolnay <dtolnay@gmail.com>
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Signed-off-by: Xuanwo <github@xuanwo.io>
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Signed-off-by: Xuanwo <github@xuanwo.io>
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Signed-off-by: Xuanwo <github@xuanwo.io>
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Add `UnwindSafe` to `Once`
Fixes #43469
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Quote bat script command line
Fixes #91991
[`CreateProcessW`](https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createprocessw#parameters) should only be used to run exe files but it does have some (undocumented) special handling for files with `.bat` and `.cmd` extensions. Essentially those magic extensions will cause the parameters to be automatically rewritten. Example pseudo Rust code (note that `CreateProcess` starts with an optional application name followed by the application arguments):
```rust
// These arguments...
CreateProcess(None, `@"foo.bat` "hello world""`@,` ...);
// ...are rewritten as
CreateProcess(Some(r"C:\Windows\System32\cmd.exe"), `@""foo.bat` "hello world"""`@,` ...);
```
However, when setting the first parameter (the application name) as we now do, it will omit the extra level of quotes around the arguments:
```rust
// These arguments...
CreateProcess(Some("foo.bat"), `@"foo.bat` "hello world""`@,` ...);
// ...are rewritten as
CreateProcess(Some(r"C:\Windows\System32\cmd.exe"), `@"foo.bat` "hello world""`@,` ...);
```
This means the arguments won't be passed to the script as intended.
Note that running batch files this way is undocumented but people have relied on this so we probably shouldn't break it.
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Change Backtrace::enabled atomic from SeqCst to Relaxed
This atomic is not synchronizing anything outside of its own value, so we don't need the `Acquire`/`Release` guarantee that all memory operations prior to the store are visible after the subsequent load, nor the `SeqCst` guarantee of all threads seeing all of the sequentially consistent operations in the same order.
Using `Relaxed` reduces the overhead of `Backtrace::capture()` in the case that backtraces are not enabled.
## Benchmark
```rust
#![feature(backtrace)]
use std::backtrace::Backtrace;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::thread;
use std::time::Instant;
fn main() {
let begin = Instant::now();
let mut threads = Vec::new();
for _ in 0..64 {
threads.push(thread::spawn(|| {
for _ in 0..10_000_000 {
let _ = Backtrace::capture();
static LOL: AtomicUsize = AtomicUsize::new(0);
LOL.store(1, Ordering::Release);
}
}));
}
for thread in threads {
let _ = thread.join();
}
println!("{:?}", begin.elapsed());
}
```
**Before:** 6.73 seconds
**After:** 5.18 seconds
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kmc-solid: Add `std::sys::solid::fs::File::read_buf`
This PR adds `std::sys::solid::fs::File::read_buf` to catch up with the changes introduced by #81156 and fix the [`*-kmc-solid_*`](https://doc.rust-lang.org/nightly/rustc/platform-support/kmc-solid.html) Tier 3 targets..
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JoinHandle docs: add missing 'the'
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Stabilise entry_insert
This stabilises `HashMap:Entry::insert_entry` etc. Tracking issue #65225. It will need an FCP.
This was implemented in #64656 two years ago.
This PR includes the rename and change discussed in https://github.com/rust-lang/rust/issues/65225#issuecomment-910652430, happy to split if needed.
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Catching up with commit 3b263ceb5cb89b6d53b5a03b47ec447c3a7f7765
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