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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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Stabilize const_char_classify, const_sockaddr_setters
FCP for const_char_classify: #132241
FCP for const_sockaddr_setters: #131714
Fixes #132241
Fixes #131714
Cc ``@rust-lang/wg-const-eval``
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Improve the generic MIR in the default `PartialOrd::le` and friends
It looks like I regressed this accidentally in #137197 due to #137901
So this PR does two things:
1. Tweaks the way we're calling `is_some_and` so that it optimizes in the generic MIR (rather than needing to optimize it in every monomorphization) -- the first commit adds a MIR test, so you can see the difference in the second commit.
2. Updates the implementations of `is_le` and friends to be slightly simpler, and parallel how clang does them.
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Revert vita's c_char back to i8
# Description
Hi!
https://github.com/rust-lang/rust/pull/132975 changed the definition of `c_char` from i8 to u8 for most ARM targets. While that would usually be correct, [VITASDK uses signed chars by default](https://github.com/vitasdk/buildscripts/blob/master/patches/gcc/0001-gcc-10.patch#L33-L34). The Clang definitions are incorrect because Clang is not (yet?) supported by the vita commmunity / `VITADSK`, On the Rust side, the pre-compiled libraries the user can link to are all compiled using vita's `gcc` and [we set `TARGET_CC` and `TARGET_CXX`](https://github.com/vita-rust/cargo-vita/blob/d564a132cbd43947118c0d6d0ebfbea7d1dd7fa7/src/commands/build.rs#L230) in `cargo vita` for build scripts using `cc`.
I'm creating it as a draft PR so that we can discuss it and possibly get it approved here, but wait to merge the [libc side](https://github.com/rust-lang/libc/pull/4258) and get a libc version first, as having the definitions out of sync breaks std. As a nightly-only target it can be confusing/frustrating for new users when the latest nightly, which is the default, is broken.
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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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Rollup of 17 pull requests
Successful merges:
- #137827 (Add timestamp to unstable feature usage metrics)
- #138041 (bootstrap and compiletest: Use `size_of_val` from the prelude instead of imported)
- #138046 (trim channel value in `get_closest_merge_commit`)
- #138053 (Increase the max. custom try jobs requested to `20`)
- #138061 (triagebot: add a `compiler_leads` ad-hoc group)
- #138064 (Remove - from xtensa targets cpu names)
- #138075 (Use final path segment for diagnostic)
- #138078 (Reduce the noise of bootstrap changelog warnings in --dry-run mode)
- #138081 (Move `yield` expressions behind their own feature gate)
- #138090 (`librustdoc`: flatten nested ifs)
- #138092 (Re-add `DynSend` and `DynSync` impls for `TyCtxt`)
- #138094 (a small borrowck cleanup)
- #138098 (Stabilize feature `const_copy_from_slice`)
- #138103 (Git ignore citool's target directory)
- #138105 (Fix broken link to Miri intrinsics in documentation)
- #138108 (Mention me (WaffleLapkin) when changes to `rustc_codegen_ssa` occur)
- #138117 ([llvm/PassWrapper] use `size_t` when building arg strings)
r? `@ghost`
`@rustbot` modify labels: rollup
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Rollup of 25 pull requests
Successful merges:
- #135733 (Implement `&pin const self` and `&pin mut self` sugars)
- #135895 (Document workings of successors more clearly)
- #136922 (Pattern types: Avoid having to handle an Option for range ends in the type system or the HIR)
- #137303 (Remove `MaybeForgetReturn` suggestion)
- #137327 (Undeprecate env::home_dir)
- #137358 (Match Ergonomics 2024: add context and examples to the unstable book)
- #137534 ([rustdoc] hide item that is not marked as doc(inline) and whose src is doc(hidden))
- #137565 (Try to point of macro expansion from resolver and method errors if it involves macro var)
- #137637 (Check dyn flavor before registering upcast goal on wide pointer cast in MIR typeck)
- #137643 (Add DWARF test case for non-C-like `repr128` enums)
- #137744 (Re-add `Clone`-derive on `Thir`)
- #137758 (fix usage of ty decl macro fragments in attributes)
- #137764 (Ensure that negative auto impls are always applicable)
- #137772 (Fix char count in `Display` for `ByteStr`)
- #137798 (ci: use ubuntu 24 on arm large runner)
- #137802 (miri native-call support: all previously exposed provenance is accessible to the callee)
- #137805 (adjust Layout debug printing to match the internal field name)
- #137808 (Do not require that unsafe fields lack drop glue)
- #137820 (Clarify why InhabitedPredicate::instantiate_opt exists)
- #137825 (Provide more context on resolve error caused from incorrect RTN)
- #137834 (rustc_fluent_macro: use CARGO_CRATE_NAME instead of CARGO_PKG_NAME)
- #137868 (Add minimal platform support documentation for powerpc-unknown-linux-gnuspe)
- #137910 (Improve error message for `AsyncFn` trait failure for RPIT)
- #137920 (interpret/provenance_map: consistently use range_is_empty)
- #138038 (Update `compiler-builtins` to 0.1.151)
r? `@ghost`
`@rustbot` modify labels: rollup
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These gates are unnecessary now that unit tests for `core` are in a
separate package, `coretests`, instead of in the same files as the
source code. They previously prevented the two `core` versions from
conflicting with each other.
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Fix broken link to Miri intrinsics in documentation
This PR updates an outdated link in the library/core/src/intrinsics/mod.rs file. The previous link, pointing to the Miri repository's src/shims/intrinsics directory, has been replaced with the correct one: https://github.com/rust-lang/miri/tree/master/src/intrinsics. This ensures that users can access the appropriate resources for the relevant intrinsic functions.
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Do not require that unsafe fields lack drop glue
Instead, we adopt the position that introducing an `unsafe` field itself carries a safety invariant: that if you assign an invariant to that field weaker than what the field's destructor requires, you must ensure that field is in a droppable state in your destructor.
See:
- https://github.com/rust-lang/rfcs/pull/3458#discussion_r1971676100
- https://rust-lang.zulipchat.com/#narrow/channel/213817-t-lang/topic/unsafe.20fields.20RFC/near/502113897
Tracking Issue: #132922
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Fix char count in `Display` for `ByteStr`
`ByteStr as Display` performs a byte count when a char count is required.
r? ```````````@joshtriplett```````````
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r=lcnr
Ensure that negative auto impls are always applicable
r? lcnr (or reassign if you dont want to review)
https://github.com/rust-lang/rust/issues/68318#issuecomment-2689265030
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Pattern types: Avoid having to handle an Option for range ends in the type system or the HIR
Instead,
1. during hir_ty_lowering, we now generate constants for the min/max when the range doesn't have a start/end specified.
2. in a later commit we generate those constants during ast lowering, simplifying everything further by not having to handle the range end inclusivity anymore in the type system (and thus avoiding any issues of `0..5` being different from `0..=4`
I think it makes all the type system code simpler, and the cost of the extra `ConstKind::Value` processing seems negligible.
r? `@BoxyUwU`
cc `@joshtriplett` `@scottmcm`
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Document workings of successors more clearly
This is an attempt to fix #135087 together with https://github.com/rust-lang/rust/pull/135886, but I am not sure if I've succeeded in adding much clarity here, so don't be shy with your comments.
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Replaced the outdated link to https://github.com/rust-lang/miri/blob/master/src/shims/intrinsics with the correct link https://github.com/rust-lang/miri/tree/master/src/intrinsics in the library/core/src/intrinsics/mod.rs file.
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Stabilizes `copy_from_slice` method on `[T]`
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Count char width at most once in `Formatter::pad`
When both width and precision flags are specified, then `Formatter::pad` counts the character width twice. Instead, record the character width when truncating it to the precision, so it does not need to be recomputed. Simplify control flow so the cases are more clear.
Related:
- 6c9e708f4be (`fmt::Formatter::pad`: don't call chars().count() more than one time, 2021-09-01): Reduce counting chars from thrice to twice in worst case
- ede39aeb331 (feat: reinterpret `precision` field for strings, 2016-06-29): Change meaning of precision for strings
- b820748ff5a (Implement formatting arguments for strings and integers, 2013-08-10): Implement `Formatter::pad`
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dec2flt: Clean up float parsing modules
This is the first portion of my work adding support for parsing and printing `f16`. Changes in `float.rs` replace the magic constants with expressions and add some use of generics to better support the new float types. Everything else is related to documentation or naming; there are no functional changes in this PR.
This can be reviewed by commit.
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Stabilize [T]::split_off... methods
This was previously known as the slice_take feature.
Closes #62280
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Rollup of 12 pull requests
Successful merges:
- #135767 (Future incompatibility warning `unsupported_fn_ptr_calling_conventions`: Also warn in dependencies)
- #137852 (Remove layouting dead code for non-array SIMD types.)
- #137863 (Fix pretty printing of unsafe binders)
- #137882 (do not build additional stage on compiler paths)
- #137894 (Revert "store ScalarPair via memset when one side is undef and the other side can be memset")
- #137902 (Make `ast::TokenKind` more like `lexer::TokenKind`)
- #137921 (Subtree update of `rust-analyzer`)
- #137922 (A few cleanups after the removal of `cfg(not(parallel))`)
- #137939 (fix order on shl impl)
- #137946 (Fix docker run-local docs)
- #137955 (Always allow rustdoc-json tests to contain long lines)
- #137958 (triagebot.toml: Don't label `test/rustdoc-json` as A-rustdoc-search)
r? `@ghost`
`@rustbot` modify labels: rollup
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Make phantom variance markers transparent
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this doesn't fix any bugs, it just looks more consistent with the other impl's
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fix `RangeBounds::is_empty` documentation
One-sided ranges are never empty
follow-up for https://github.com/rust-lang/rust/pull/137304#pullrequestreview-2646899461
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This is an attempt to fix #135087 together with https://github.com/rust-lang/rust/pull/135886, but I am not sure if I've succeeded in adding much clarity here, so don't be shy with your comments.
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This is just a bit of code cleanup to make use of returning early.
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A lot of the magic constants can be turned into expressions. This
reduces some code duplication.
Additionally, add traits to make these operations fully generic. This
will make it easier to support `f16` and `f128`.
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The previous commit renamed `Decimal` to `DecimalSeq`. Now, rename the
type that represents a decimal floating point number to be `Decimal`.
Additionally, add some tests for internal behavior.
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This module currently contains two decimal types, `Decimal` and
`Number`. These names don't provide a whole lot of insight into what
exactly they are, and `Number` is actually the one that is more like an
expected `Decimal` type.
In accordance with this, rename the existing `Decimal` to `DecimalSeq`.
This highlights that it contains a sequence of decimal digits, rather
than representing a base-10 floating point (decimal) number.
Additionally, add some tests to validate internal behavior.
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Fix or elaborate existing float parsing documentation. This includes
introducing a convention that should make naming more consistent.
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These constants can be useful outside of their current module. Make them
`pub(crate)` to allow for this.
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One-sided ranges are never empty
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This way it can use the nice new LLVM intrinsic in LLVM20.
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Fix inaccurate `std::intrinsics::simd` documentation
This addresses two issues:
- the docs on comparison operators (`simd_gt` etc.) said they only work for floating-point vectors, but they work for integer vectors too.
- the docs on various functions that use a mask did not document that the mask must be a signed integer vector. Unsigned integer vectors would cause invalid behavior when the mask vector is widened (unsigned integers would use zero extension, producing incorrect results).
r? ``@workingjubilee``
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this is because they may be widened, and that only works when sign extension is used: zero extension would produce invalid results
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these all also accept integer vectors as arguments
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This was previously known as the slice_take feature.
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