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Put the alloc unit tests in a separate alloctests package
Same rationale as https://github.com/rust-lang/rust/pull/135937. This PR has some extra complexity though as a decent amount of tests are testing internal implementation details rather than the public api. As such I opted to include the modules containing the types under test using `#[path]` into the alloctests package. This means that those modules still need `#[cfg(test)]`, but the rest of liballoc no longer need it.
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For the tests that make use of internal implementation details, we
include the module to test using #[path] in alloctests now.
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Ergonomic ref counting
This is an experimental first version of ergonomic ref counting.
This first version implements most of the RFC but doesn't implement any of the optimizations. This was left for following iterations.
RFC: https://github.com/rust-lang/rfcs/pull/3680
Tracking issue: https://github.com/rust-lang/rust/issues/132290
Project goal: https://github.com/rust-lang/rust-project-goals/issues/107
r? ```@nikomatsakis```
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library: Use `size_of` from the prelude instead of imported
Use `std::mem::{size_of, size_of_val, align_of, align_of_val}` from the prelude instead of importing or qualifying them.
These functions were added to all preludes in Rust 1.80.
try-job: test-various
try-job: x86_64-gnu
try-job: x86_64-msvc-1
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Use `std::mem::{size_of, size_of_val, align_of, align_of_val}` from the
prelude instead of importing or qualifying them.
These functions were added to all preludes in Rust 1.80.
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Update `compiler-builtins` to 0.1.151
This enables `f16` builtins for loongarch [1] and adds support for Cygwin [2].
[1]: https://github.com/rust-lang/compiler-builtins/pull/770
[2]: https://github.com/rust-lang/compiler-builtins/pull/774
try-job: dist-loongarch64-linux
try-job: dist-loongarch64-musl
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Stabilize `string_extend_from_within`
FCP'd here: https://github.com/rust-lang/rust/issues/103806#issuecomment-2674989531.
Closes #103806.
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Rollup of 15 pull requests
Successful merges:
- #137829 (Stabilize [T]::split_off... methods)
- #137850 (Stabilize `box_uninit_write`)
- #137912 (Do not recover missing lifetime with random in-scope lifetime)
- #137913 (Allow struct field default values to reference struct's generics)
- #137923 (Simplify `<Postorder as Iterator>::size_hint`)
- #137949 (Update MSVC INSTALL.md instructions to recommend VS 2022 + recent Windows 10/11 SDK)
- #137963 (Add ``dyn`` keyword to `E0373` examples)
- #137975 (Remove unused `PpMode::needs_hir`)
- #137981 (rustdoc search: increase strictness of typechecking)
- #137986 (Fix some typos)
- #137991 (Add `avr-none` to SUMMARY.md and platform-support.md)
- #137993 (Remove obsolete comment from DeduceReadOnly)
- #137996 (Revert "compiler/rustc_data_structures/src/sync/worker_local.rs: delete "unsafe impl Sync"")
- #138019 (Pretty-print `#[deprecated]` attribute in HIR.)
- #138026 (Make CrateItem::body() function return an option)
r? `@ghost`
`@rustbot` modify labels: rollup
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This enables `f16` builtins for loongarch [1] and adds support for
Cygwin [2].
[1]: https://github.com/rust-lang/compiler-builtins/pull/770
[2]: https://github.com/rust-lang/compiler-builtins/pull/774
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Stabilize `box_uninit_write`
Closes: https://github.com/rust-lang/rust/issues/129397.
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Update `compiler-builtins` to 0.1.149
Includes a change to make a subset of math symbols available on all platforms [1], and disables `f16` on aarch64 without neon [2].
[1]: https://github.com/rust-lang/compiler-builtins/pull/763
[2]: https://github.com/rust-lang/compiler-builtins/pull/775
try-job: aarch64-gnu
try-job: aarch64-gnu-debug
try-job: armhf-gnu
try-job: dist-various-1
try-job: dist-various-2
try-job: dist-aarch64-linux
try-job: dist-arm-linux
try-job: dist-armv7-linux
try-job: dist-x86_64-linux
try-job: test-various
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More precisely document `Global::deallocate()`'s safety.
There is a subtlety which "other conditions must be upheld by the caller" does not capture: `GlobalAlloc`/`alloc::dealloc()` require that the provided layout will be *equal*, not just that it "fits", the layout used to allocate. This is always true here due to how `allocate()`, `grow()`, and `shrink()` are implemented (they never return a larger allocation than requested), but that is a non-local property of the implementation, so it should be documented explicitly.
r? libs
`@rustbot` label A-allocators
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Includes a change to make a subset of math symbols available on all
platforms [1], and disables `f16` on aarch64 without neon [2].
[1]: https://github.com/rust-lang/compiler-builtins/pull/763
[2]: https://github.com/rust-lang/compiler-builtins/pull/775
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There is a subtlety which "other conditions must be upheld by the caller"
does not capture: `GlobalAlloc`/`alloc::dealloc()` require that the
provided layout will be *equal*, not just that it "fits", the layout
used to allocate. This is always true here due to how `allocate()`,
`grow()`, and `shrink()` are implemented (they never return a larger
allocation than requested), but that is a non-local property of the
implementation, so it should be documented explicitly.
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Rollup of 8 pull requests
Successful merges:
- #137370 (adjust_abi: make fallback logic for ABIs a bit easier to read)
- #137444 (Improve behavior of `IF_LET_RESCOPE` around temporaries and place expressions)
- #137464 (Fix invalid suggestion from type error for derive macro)
- #137539 ( Add rustdoc-gui regression test for #137082 )
- #137576 (Don't doc-comment BTreeMap<K, SetValZST, A>)
- #137595 (remove `simd_fpow` and `simd_fpowi`)
- #137600 (type_ir: remove redundant part of comment)
- #137602 (feature: fix typo in attribute description)
r? `@ghost`
`@rustbot` modify labels: rollup
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Update `compiler-builtins` to 0.1.148
Includes `f16` symbols on MIPS [1], updates for `libm` [2], and reapplies the patch that drops the `public_test_deps!` macro [3].
[1]: https://github.com/rust-lang/compiler-builtins/pull/762
[2]: https://github.com/rust-lang/compiler-builtins/pull/765
[3]: https://github.com/rust-lang/compiler-builtins/pull/766
try-job: aarch64-gnu
try-job: i686-mingw-1
try-job: i686-mingw-2
try-job: test-various
try-job: x86_64-msvc-1
try-job: x86_64-msvc-2
try-job: x86_64-rust-for-linux
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Don't doc-comment BTreeMap<K, SetValZST, A>
This otherwise shows up in documentation as an empty impl block (worse, at the *top* of the docs above the public impls).
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Rollup of 8 pull requests
Successful merges:
- #134655 (Stabilize `hash_extract_if`)
- #135933 (Explain how Vec::with_capacity is faithful)
- #136668 (Stabilize `core::str::from_utf8_mut` as `const`)
- #136775 (Update `String::from_raw_parts` safety requirements)
- #137109 (stabilize extract_if)
- #137349 (Implement `read_buf` for zkVM stdin)
- #137493 (configure.py: don't instruct user to run nonexistent program)
- #137516 (remove some unnecessary rustc_const_unstable)
r? `@ghost`
`@rustbot` modify labels: rollup
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stabilize extract_if
Tracking issue: #43244
Closes: #43244
FCP completed: https://github.com/rust-lang/rust/issues/43244#issuecomment-2523595704
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Update `String::from_raw_parts` safety requirements
These have become out of sync with `Vec::from_raw_part`'s safety requirements, and are likely to diverge again. I think it's safest to just point at `Vec`'s requirements.
https://github.com/rust-lang/rust/issues/119206#issuecomment-2180116680
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Stabilize `core::str::from_utf8_mut` as `const`
cc #91006 (tracking issue)
r? libs-api
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Explain how Vec::with_capacity is faithful
This is a revival of https://github.com/rust-lang/rust/pull/99790 building on the prose of `@workingjubilee` and edits of `@jmaargh.` Closes https://github.com/rust-lang/rust/issues/99385.
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Co-authored-by: Amanieu d'Antras <amanieu@gmail.com>
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Includes `f16` symbols on MIPS [1], updates for `libm` [2], and
reapplies the patch that drops the `public_test_deps!` macro [3].
[1]: https://github.com/rust-lang/compiler-builtins/pull/762
[2]: https://github.com/rust-lang/compiler-builtins/pull/765
[3]: https://github.com/rust-lang/compiler-builtins/pull/766
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rename sub_ptr to offset_from_unsigned
i also made `byte_sub_ptr` `byte_offset_from_unsigned`
fixes #137121
tracking issue #95892
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Update `compiler-builtins` to 0.1.147
Removes an ABI hack that used `<2 x i64>` to return `i128` in `xmm0` on Windows [1].
[1]: https://github.com/rust-lang/compiler-builtins/pull/759
Link: https://github.com/rust-lang/rust/issues/116558
Link: https://github.com/rust-lang/compiler-builtins/issues/758
try-job: x86_64-mingw-1
try-job: x86_64-mingw-2
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Master bootstrap update
https://forge.rust-lang.org/release/process.html#master-bootstrap-update-tuesday
r? `@Mark-Simulacrum`
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Removes an ABI hack that used `<2 x i64>` to return `i128` in `xmm0` on
Windows [1].
[1]: https://github.com/rust-lang/compiler-builtins/pull/759
Link: https://github.com/rust-lang/rust/issues/116558
Link: https://github.com/rust-lang/compiler-builtins/issues/758
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stabilize `(const_)ptr_sub_ptr`
Tracking issue: #95892
Closes #95892
FCP Completed: https://github.com/rust-lang/rust/issues/95892#issuecomment-2561139730
r? ````@Noratrieb````
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Inject `compiler_builtins` during postprocessing and ensure it is made private
Follow up of https://github.com/rust-lang/rust/pull/135278
Do the following:
* Inject `compiler_builtins` during postprocessing, rather than injecting `extern crate compiler_builtins as _` into the AST
* Do not make dependencies of `std` private by default (this was added in #135278)
* Make sure sysroot crates correctly mark their dependencies private/public
* Ensure that marking a dependency private makes its dependents private by default as well, unless otherwise specified
* Do the `compiler_builtins` update that has been blocked on this
There is more detail in the commit messages. This includes the changes I was working on in https://github.com/rust-lang/rust/pull/136226.
try-job: test-various
try-job: x86_64-msvc-1
try-job: x86_64-msvc-2
try-job: i686-mingw-1
try-job: i686-mingw-2
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In [1], most dependencies of `std` and other sysroot crates were marked
private, but this did not happen for `alloc` and `test`. Update these
here, marking public standard library crates as the only non-private
dependencies.
[1]: https://github.com/rust-lang/rust/pull/111076
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Reduce `Box::default` stack copies in debug mode
The `Box::new(T::default())` implementation of `Box::default` only
had two stack copies in debug mode, compared to the current version,
which has four. By avoiding creating any `MaybeUninit<T>`'s and just writing
`T` directly to the `Box` pointer, the stack usage in debug mode remains
the same as the old version.
Another option would be to mark `Box::write` as `#[inline(always)]`,
and change it's implementation to to avoid calling `MaybeUninit::write`
(which creates a `MaybeUninit<T>` on the stack) and to use `ptr::write` instead.
Fixes: #136043
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Co-authored-by: Jubilee <workingjubilee@gmail.com> and jmaargh
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'PartialEq<{CStr, &CStr, Cow<CStr>}>' for 'CString'; Implement 'PartialEq<{CStr, &CStr, CString}>' for 'Cow<CStr>';
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Impl TryFrom<Vec<u8>> for String
I think this is useful enough to have :)
As a general question, is there any policy around adding "missing" trait implementations? (like adding `AsRef<T> for T` for std types), I mostly stumble upon them when using a lot of "impl Trait in argument position" like (`foo: impl Into<String>`)
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