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Implement Extend<AsciiChar> for String
Implement `Extend<AsciiChar>` for `String` as suggested in https://github.com/rust-lang/rust/issues/110998#issuecomment-2590122968. Also implements `Extend<&AsciiChar>` since there's an analogous impl for `Extend<&char>`, but happy to remove if not thought useful.
r? `@scottmcm`
since you requested it, but no pressure to review!
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Prepare standard library for Rust 2024 migration
This includes a variety of commits preparing the standard library for migration to Rust 2024.
The actual migration is blocked on a few things, so I wanted to get this out of the way in a relatively digestable PR.
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alloc boxed: docs: use MaybeUninit::write instead of as_mut_ptr
In the deferred initialization pattern, the docs were needlessly going through `as_mut_ptr().write()` to initialize, which is unnecessary use of a pointer, needs to be inside an `unsafe` block, and may weaken alias analysis.
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A small workaround for https://github.com/rust-lang/rust/issues/136899,
rustdoc's invalid_rust_codeblocks was not handling this well in 2024.
This may be needed when migrating to 2024 when building with stage0.
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Stabilize `get_many_mut` as `get_disjoint_mut`
Tracking issue: #104642
Closes #104642
FCP completed in https://github.com/rust-lang/rust/issues/104642#issuecomment-2558161073
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In the deferred initialization pattern, the docs were needlessly going
through as_mut_ptr().write() to initialize, which is unnecessary use of
a pointer, needs to be inside an unsafe block, and may weaken alias
analysis.
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Update `compiler-builtins` to 0.1.146
Exposes the error function so we can expose this in the standard library [1].
[1]: https://github.com/rust-lang/compiler-builtins/pull/753
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Some miscellaneous edition-related library tweaks
Some library edition tweaks that can be done separately from upgrading the whole standard library to edition 2024 (which is blocked on getting the submodules upgraded, for example)
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Simplify Rc::as_ptr docs + typo fix
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Stabilize `vec_pop_if`
Tracking issue: #122741
FCP completed in https://github.com/rust-lang/rust/issues/122741#issuecomment-2605116387
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Update bootstrap compiler and rustfmt
The rustfmt version we previously used formats things differently from what the latest nightly rustfmt does. This causes issues for subtrees that get formatted both in-tree and in their own repo. Updating the rustfmt used in-tree solves those issues. Also bumped the bootstrap compiler as the stage0 update command always updates both at the same
time.
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Optimize `Rc::<str>::default()` implementation
This PR lets `impl Default for Rc<str>` re-use the implementation for `Rc::<[u8]>::default()`. The previous version only calculted the memory layout at runtime, even though it should be known at compile time, resulting in an additional function call.
The same optimization is done for `Rc<CStr>`.
Generated byte code: <https://godbolt.org/z/dfq73jsoP>.
Resolves <https://github.com/rust-lang/rust/issues/135784>.
Cc `@Billy-Sheppard.`
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Exposes the error function so we can expose this in the standard
library [1].
[1]: https://github.com/rust-lang/compiler-builtins/pull/753
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While working on #122661, some of these started triggering our "unnecessary parens" lints due to a change in the `assert!` desugaring. A cursory search identified a few more. Some of these have been carried from before 1.0, were a bulk rename from the previous name of `assert!` left them in that state. I went and removed as many of these unnecessary parens as possible in order to have fewer annoyances in the future if we make the lint smarter.
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This includes [1] which is required for LLVM 20.
[1]: https://github.com/rust-lang/compiler-builtins/pull/752
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btree/node.rs: remove incorrect comment from pop_internal_level docs
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Rollup of 9 pull requests
Successful merges:
- #135869 (Make docs for AtomicUsize::from_mut platform-independent)
- #135892 (-Znext-solver: "normalize" signature before checking it mentions self in `deduce_closure_signature`)
- #136055 (Implement MIR const trait stability checks)
- #136066 (Pass spans to `perform_locally_in_new_solver`)
- #136071 ([Clippy] Add vec_reserve & vecdeque_reserve diagnostic items)
- #136124 (Arbitrary self types v2: explain test.)
- #136149 (Flip the `rustc-rayon`/`indexmap` dependency order)
- #136173 (Update comments and sort target_arch in c_char_definition)
- #136178 (Update username in build helper example)
r? `@ghost`
`@rustbot` modify labels: rollup
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[Clippy] Add vec_reserve & vecdeque_reserve diagnostic items
I’m currently working on reviving this lint (https://github.com/rust-lang/rust-clippy/pull/10157), and there was [a comment](https://github.com/rust-lang/rust-clippy/pull/10157#discussion_r1091591057) from ``@flip1995`` regarding the necessity of adding new diagnostic items.
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* Renames the methods:
* `get_many_mut` -> `get_disjoint_mut`
* `get_many_unchecked_mut` -> `get_disjoint_unchecked_mut`
* Does not rename the feature flag: `get_many_mut`
* Marks the feature as stable
* Renames some helper stuff:
* `GetManyMutError` -> `GetDisjointMutError`
* `GetManyMutIndex` -> `GetDisjointMutIndex`
* `get_many_mut_helpers` -> `get_disjoint_mut_helpers`
* `get_many_check_valid` -> `get_disjoint_check_valid`
This only touches slice methods.
HashMap's methods and feature gates are not renamed here
(nor are they stabilized).
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Add missing allocator safety in alloc crate
### PR Description
In the previous PR [#135009](https://github.com/rust-lang/rust/pull/135009), PR [#134496](https://github.com/rust-lang/rust/pull/134496), some incomplete API documentation issues have been fixed.
Based on these changes, other inconsistencies related to the allocator have also been identified, including:
- `Box::from_non_null`
- `Box::from_non_null_in`
- `Weak::from_raw`
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Enable `unreachable_pub` lint in `alloc`
This PR enables the [`unreachable_pub`](https://doc.rust-lang.org/rustc/lints/listing/allowed-by-default.html#unreachable-pub) lint as warn in the `alloc` crate.
Most of changes are in the btree implementation and in tests.
*The diff was mostly generated with `./x.py fix --stage 1 library/alloc/ -- --broken-code`, as well as manual edits for code in macros and in tests.*
Continuation of #134286 and #135366
r? libs
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This PR lets `impl Default for Rc<str>` re-use the implementation
for `Rc::<[u8]>::default()`. The previous version only calculted the
memory layout at runtime, even though it should be known at compile
time, resulting in an additional function call.
The same optimization is done for `Rc<CStr>`.
Generated byte code: <https://godbolt.org/z/dfq73jsoP>.
Resolves <https://github.com/rust-lang/rust/issues/135784>.
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Update emscripten std tests
This disables a bunch of emscripten tests that test things emscripten doesn't support and re-enables a whole bunch of tests which now work just fine on emscripten.
Tested with `EMCC_CFLAGS="-s MAXIMUM_MEMORY=2GB" ./x.py test library/ --target wasm32-unknown-emscripten`.
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document order of items in iterator from drain
fixes #135710
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Doc difference between extend and extend_from_slice
fixes #97119
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Make `Vec::pop_if` a bit more presentable
#135488 minus stabilization.
As suggested in https://github.com/rust-lang/rust/pull/135488#issuecomment-2608108210.
r? tgross35
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fixes #97119
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They are either outdated as emscripten now supports i128 or they are
subsumed by #[cfg_attr(not(panic = "unwind"), ignore]
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This does need EMCC_CFLAGS="-s MAXIMUM_MEMORY=2GB" avoid several OOMs.
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Implement `VecDeque::pop_front_if` & `VecDeque::pop_back_if`
Tracking issue: #135889
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Implement `ByteStr` and `ByteString` types
Approved ACP: https://github.com/rust-lang/libs-team/issues/502
Tracking issue: https://github.com/rust-lang/rust/issues/134915
These types represent human-readable strings that are conventionally,
but not always, UTF-8. The `Debug` impl prints non-UTF-8 bytes using
escape sequences, and the `Display` impl uses the Unicode replacement
character.
This is a minimal implementation of these types and associated trait
impls. It does not add any helper methods to other types such as `[u8]`
or `Vec<u8>`.
I've omitted a few implementations of `AsRef`, `AsMut`, and `Borrow`,
when those would be the second implementation for a type (counting the
`T` impl), to avoid potential inference failures. We can attempt to add
more impls later in standalone commits, and run them through crater.
In addition to the `bstr` feature, I've added a `bstr_internals` feature
for APIs provided by `core` for use by `alloc` but not currently
intended for stabilization.
This API and its implementation are based *heavily* on the `bstr` crate
by Andrew Gallant (`@BurntSushi).`
r? `@BurntSushi`
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