PR #137977 changed `DefPathData::TypeNs` to contain `Option<Symbol>` to
account for RPITIT assoc types being anonymous. This commit changes it
back to `Symbol` and gives anonymous assoc types their own variant. It
makes things a bit nicer overall.
This previously incorrectly returned `true` for parent functions whose
first statement was `let local = <coroutine>;`. While that didn't cause
any bugs as we only ever access `movable_coroutine` for `yield`
terminators. It was still wrong.
Improve `AssocItem::descr`.
The commit adds "associated" to the description of associated types and associated consts, to match the description of associated functions. This increases error message precision and consistency with `AssocKind::fmt`.
The commit also notes an imperfection in `AssocKind::fmt`; fixing this imperfection is possible but beyond the scope of this PR.
r? `@estebank`
Allow parenthesis around inferred array lengths
In #135272 it was noticed that we weren't handling `Vec<(((((_)))))>` correctly under the new desugaring for `generic_arg_infer`, this had to be fixed in order to not regress stable code for types that should continue working. This has the side effect of *also* allowing the following to work:
```rust
#![feature(generic_arg_infer)]
struct Bar<const N: usize>;
fn main() {
let a: Bar<((_))> = Bar::<10>;
}
```
However I did not make the same change for array lengths resulting in the following not compiling:
```rust
#![feature(generic_arg_infer)]
fn main() {
let a: [u8; (((_)))] = [2; 2];
let a: [u8; 2] = [2; (((((_)))))];
}
```
This is rather inconsistent as parenthesis around `_` *are* supported for const args to non-arrays, and type args. This PR fixes this allowing the above example to compile. No stable impact.
r? compiler-errors
Deeply normalize obligations in `BestObligation` folder
Built on #139513.
This establishes a somewhat rough invariant that the `Obligation`'s predicate is always deeply normalized in the folder; when we construct a new obligation we normalize it.
Putting this up for discussion since it does affect some goals.
r? lcnr
Allow drivers to supply a list of extra symbols to intern
Allows adding new symbols as `const`s in external drivers, desirable in Clippy so we can use them in patterns to replace code like 75530e9f72/src/tools/clippy/clippy_lints/src/casts/cast_ptr_alignment.rs (L66)
The Clippy change adds a couple symbols as a demo, the exact `clippy_utils` API and replacing other usages can be done on the Clippy side to minimise sync conflicts
---
try-job: aarch64-gnu
add `core::intrinsics::simd::{simd_extract_dyn, simd_insert_dyn}`
fixes https://github.com/rust-lang/rust/issues/137372
adds `core::intrinsics::simd::{simd_extract_dyn, simd_insert_dyn}`, which contrary to their non-dyn counterparts allow a non-const index. Many platforms (but notably not x86_64 or aarch64) have dedicated instructions for this operation, which stdarch can emit with this change.
Future work is to also make the `Index` operation on the `Simd` type emit this operation, but the intrinsic can't be used directly. We'll need some MIR shenanigans for that.
r? `@ghost`
The commit adds "associated" to the description of associated types and
associated consts, to match the description of associated functions.
This increases error message precision and consistency with
`AssocKind::fmt`.
The commit also notes an imperfection in `AssocKind::fmt`; fixing this
imperfection is possible but beyond the scope of this PR.
Reuse the index from promoted nodes when coloring executed tasks
https://github.com/rust-lang/rust/pull/138824 did not correctly handle the case where a dep node was promoted green, but later or concurrently executed. It resulted in multiple dep nodes being allocated to it. This fixes that by checking that the node was not previously green in the encoder lock.
This also fixes a race when forcing diagnostic nodes introduced in https://github.com/rust-lang/rust/pull/138824.
https://github.com/rust-lang/rust/pull/138824 should get reverted on beta.
This should fix#139110.
r? `@oli-obk`
Rename some `name` variables as `ident`.
It bugs me when variables of type `Ident` are called `name`. It leads to silly things like `name.name`. `Ident` variables should be called `ident`, and `name` should be used for variables of type `Symbol`.
This commit improves things by by doing `s/name/ident/` on a bunch of `Ident` variables. Not all of them, but a decent chunk.
r? `@fee1-dead`
fix "still mutable" ice while metrics are enabled
Resolves "still mutable" ICE discovered by `@matthiaskrgr` here: [#t-docs-rs > metrics intitiative @ 💬](510490790)
This was caused by invoking `crate_hash` before the `definitions` struct was frozen here: e643f59f6d/compiler/rustc_interface/src/passes.rs (L951)
resolved by moving metrics dumping to occur after `analysis` freezes the definitions
I'm guessing we didn't discover this in CI because the problem only occurs when you try to calculate the crash hash with incremental compilation enabled when it tries to freeze the definitions here: e643f59f6d/compiler/rustc_middle/src/hir/map.rs (L1172)
my understanding is that this causes us to freeze the definitions too early in compilation, then we subsequently try to mutate them, likely during `analysis`, and this causes the ICE.
r? `@bjorn3`
Rollup of 13 pull requests
Successful merges:
- #138167 (Small code improvement in rustdoc hidden stripper)
- #138605 (Clean up librustdoc::html::render to be better encapsulated)
- #139423 (Suppress missing field error when autoderef bottoms out in infer)
- #139449 (match ergonomics: replace `peel_off_references` with a recursive call)
- #139507 (compiletest: Trim whitespace from environment variable names)
- #139530 (Remove some dead or leftover code related to rustc-intrinsic abi removal)
- #139560 (fix title of offset_of_enum feature)
- #139563 (emit a better error message for using the macro incorrectly)
- #139568 (Don't use empty trait names)
- #139580 (Temporarily leave the review rotation)
- #139589 (saethlin is back from vacation)
- #139592 (rustdoc: Enable Markdown extensions when looking for doctests)
- #139599 (Tracking issue template: fine-grained information on style update status)
r? `@ghost`
`@rustbot` modify labels: rollup
It's possible to build no_std programs with this compiler.
> A tier 3 target must have a designated developer or developers (the "target
maintainers") on record to be CCed when issues arise regarding the target. (The
mechanism to track and CC such developers may evolve over time.)
Tim Newsome (@tnewsome-lynx) will be the designated developer for
x86_64-lynx-lynxos178 support.
> Targets must use naming consistent with any existing targets; for instance, a
target for the same CPU or OS as an existing Rust target should use the same
name for that CPU or OS. Targets should normally use the same names and naming
conventions as used elsewhere in the broader ecosystem beyond Rust (such as in
other toolchains), unless they have a very good reason to diverge. Changing the
name of a target can be highly disruptive, especially once the target reaches a
higher tier, so getting the name right is important even for a tier 3 target.
I believe the target is named appropriately.
> Target names should not introduce undue confusion or ambiguity unless
absolutely necessary to maintain ecosystem compatibility. For example, if the
name of the target makes people extremely likely to form incorrect beliefs about
what it targets, the name should be changed or augmented to disambiguate it.
The target name is not confusing.
> If possible, use only letters, numbers, dashes and underscores for the name.
Periods (.) are known to cause issues in Cargo.
Done.
> Tier 3 targets may have unusual requirements to build or use, but must not
create legal issues or impose onerous legal terms for the Rust project or for
Rust developers or users.
> The target must not introduce license incompatibilities.
> Anything added to the Rust repository must be under the standard Rust license
(MIT OR Apache-2.0).
All this new code is licensed under the Apache-2.0 license.
> The target must not cause the Rust tools or libraries built for any other host
(even when supporting cross-compilation to the target) to depend on any new
dependency less permissive than the Rust licensing policy. This applies whether
the dependency is a Rust crate that would require adding new license exceptions
(as specified by the tidy tool in the rust-lang/rust repository), or whether the
dependency is a native library or binary. In other words, the introduction of
the target must not cause a user installing or running a version of Rust or the
Rust tools to be subject to any new license requirements.
Done.
> Compiling, linking, and emitting functional binaries, libraries, or other code
for the target (whether hosted on the target itself or cross-compiling from
another target) must not depend on proprietary (non-FOSS) libraries. Host tools
built for the target itself may depend on the ordinary runtime libraries
supplied by the platform and commonly used by other applications built for the
target, but those libraries must not be required for code generation for the
target; cross-compilation to the target must not require such libraries at all.
For instance, rustc built for the target may depend on a common proprietary C
runtime library or console output library, but must not depend on a proprietary
code generation library or code optimization library. Rust's license permits
such combinations, but the Rust project has no interest in maintaining such
combinations within the scope of Rust itself, even at tier 3.
I think we're in the clear here. We do link against some static libraries that
are proprietary (like libm and libc), but those are not used to generate code.
E.g. the VxWorks target requires `wr-c++` to be installed, which is not
publically available.
> "onerous" here is an intentionally subjective term. At a minimum, "onerous"
legal/licensing terms include but are not limited to: non-disclosure
requirements, non-compete requirements, contributor license agreements (CLAs) or
equivalent, "non-commercial"/"research-only"/etc terms, requirements conditional
on the employer or employment of any particular Rust developers, revocable
terms, any requirements that create liability for the Rust project or its
developers or users, or any requirements that adversely affect the livelihood or
prospects of the Rust project or its developers or users.
Our intention is to allow anyone with access to LynxOS CDK to use Rust for it.
> Neither this policy nor any decisions made regarding targets shall create any
binding agreement or estoppel by any party. If any member of an approving Rust
team serves as one of the maintainers of a target, or has any legal or
employment requirement (explicit or implicit) that might affect their decisions
regarding a target, they must recuse themselves from any approval decisions
regarding the target's tier status, though they may otherwise participate in
discussions.
> This requirement does not prevent part or all of this policy from being cited
in an explicit contract or work agreement (e.g. to implement or maintain support
for a target). This requirement exists to ensure that a developer or team
responsible for reviewing and approving a target does not face any legal threats
or obligations that would prevent them from freely exercising their judgment in
such approval, even if such judgment involves subjective matters or goes beyond
the letter of these requirements.
No problem.
> Tier 3 targets should attempt to implement as much of the standard libraries
as possible and appropriate (core for most targets, alloc for targets that can
support dynamic memory allocation, std for targets with an operating system or
equivalent layer of system-provided functionality), but may leave some code
unimplemented (either unavailable or stubbed out as appropriate), whether
because the target makes it impossible to implement or challenging to implement.
The authors of pull requests are not obligated to avoid calling any portions of
the standard library on the basis of a tier 3 target not implementing those
portions.
With this first PR, only core is supported. I am working on support for the std
library and intend to submit that once all the tests are passing.
> The target must provide documentation for the Rust community explaining how to
build for the target, using cross-compilation if possible. If the target
supports running binaries, or running tests (even if they do not pass), the
documentation must explain how to run such binaries or tests for the target,
using emulation if possible or dedicated hardware if necessary.
This is documented in `src/doc/rustc/src/platform-support/lynxos_178.md`.
> Tier 3 targets must not impose burden on the authors of pull requests, or
other developers in the community, to maintain the target. In particular, do not
post comments (automated or manual) on a PR that derail or suggest a block on
the PR based on a tier 3 target. Do not send automated messages or notifications
(via any medium, including via @) to a PR author or others involved with a PR
regarding a tier 3 target, unless they have opted into such messages.
> Backlinks such as those generated by the issue/PR tracker when linking to an
issue or PR are not considered a violation of this policy, within reason.
However, such messages (even on a separate repository) must not generate
notifications to anyone involved with a PR who has not requested such
notifications.
Understood.
> Patches adding or updating tier 3 targets must not break any existing tier 2
or tier 1 target, and must not knowingly break another tier 3 target without
approval of either the compiler team or the maintainers of the other tier 3
target.
> In particular, this may come up when working on closely related targets, such
as variations of the same architecture with different features. Avoid
introducing unconditional uses of features that another variation of the target
may not have; use conditional compilation or runtime detection, as appropriate,
to let each target run code supported by that target.
As far as I know this change does not affect any other targets.
> Tier 3 targets must be able to produce assembly using at least one of rustc's
supported backends from any host target. (Having support in a fork of the
backend is not sufficient, it must be upstream.)
Many targets produce assembly for x86_64 so that also works for LynxOS-178.
emit a better error message for using the macro incorrectly
fixing: https://github.com/EnzymeAD/rust/issues/185
I feel like it's not a perfect message either, so I'm open to suggestions.
But at the end of the day users will need to read the docs anyway, and emitting
multi-line errors each time this gets triggered can probably become annoying?
r? ``@jieyouxu`` since you've reviewed my frontend work back in the days.
Tracking:
- https://github.com/rust-lang/rust/issues/124509
match ergonomics: replace `peel_off_references` with a recursive call
This makes it imo quite a bit easier to follow how the binding mode gets calculated.
cc ```@dianne```
Suppress missing field error when autoderef bottoms out in infer
I see this error repeatedly when doing refactorings, and it's pretty misleading b/c it's not the source of the error.
