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We have fairly different error messages now and handle more cases,
so we augment the test in tests/ui/abi/unsupported.rs with more examples
to handle structs, traits, and impls on same when those feature
the unsupported ABIs of interest.
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These tests have expanded beyond the RFC, so rename the directory
`rfc-3086-metavar-expr` to `metavar-expressions`. `concat` (which wasn't
part of the RFC) now fits in this group, so merge its tests into the
`metavar-expressions` directory.
Additionally rename some related `issue-*` tests.
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Fix ICE on debug builds where lints are delayed on the crate root
r? ``@oli-obk``
Closes rust-lang/rust#142891
thanks to ``@JonathanBrouwer`` for finding it!
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Make `PartialEq` a `const_trait`
r? ``@fee1-dead`` or ``@compiler-errors``
something generally useful but also required for https://github.com/rust-lang/rust/pull/142789
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Port `#[no_mangle]` to new attribute parsing infrastructure
Ports `no_mangle` to the new attribute parsing infrastructure for https://github.com/rust-lang/rust/issues/131229#issuecomment-2971353197
r? ``@jdonszelmann``
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Document subdirectories of UI tests with README files
Part of rust-lang/rust#133895 and the [2025 Google Summer of Code](https://blog.rust-lang.org/2025/05/08/gsoc-2025-selected-projects/) associated project.
When adding a new UI test, one is faced with hundreds of subdirectories in `tests/ui` reflecting various categories. Knowing where to put the new test is not trivial, as many of the categories have slightly misleading names. For example, `moves` does not only refer to the `move` keyword but to functions taking ownership in general, whereas `allocator` does not refer to allocation in general but rather to the very specific `allocator_api` and `global_allocator` features.
Many contributors will therefore place their test at the top level of ̀`tests/ui` where it will be mixed with hundreds of unrelated tests.
This PR is a tentative move towards more clearly defined tag/categories, with a SUMMARY.md file documenting the true purpose of each subdirectory, placed inside `tests/ui`.
r? ``@jieyouxu``
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Signed-off-by: Jonathan Brouwer <jonathantbrouwer@gmail.com>
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Co-authored-by: Jieyou Xu <jieyouxu@outlook.com>
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Don't fail to parse a struct if a semicolon is used to separate fields
The first commit is a small refactor.
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Port `#[must_use]` to new attribute parsing infrastructure
Ports `must_use` to the new attribute parsing infrastructure for https://github.com/rust-lang/rust/issues/131229#issuecomment-2971353197
r? `@jdonszelmann`
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Add DesugaringKind::FormatLiteral
Implements `DesugaringKind::FormatLiteral` to mark the FormatArgs desugaring of format literals. The main use for this is to stop yapping about about formatting parameters if we're not anywhere near a format literal. The other use case is to fix suggestions such as https://github.com/rust-lang/rust/issues/141350. It might also be useful for new or existing diagnostics that check whether they're in a format-like macro.
cc `@xizheyin` `@fmease`
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Merge unboxed trait object error suggestion into regular dyn incompat error
Another hir-walker removed from the well-formed queries. This error was always a duplicate of another, but it was able to provide more information because it could invoke `is_dyn_compatible` without worrying about cycle errors. That's also the reason we can't put the error directly into hir_ty_lowering when lowering a `dyn Trait` within an associated item signature. So instead I packed it into the error handling of wf obligation checking.
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Signed-off-by: Jonathan Brouwer <jonathantbrouwer@gmail.com>
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All HIR attributes are outer
Fixes https://github.com/rust-lang/rust/issues/142649. Closes https://github.com/rust-lang/rust/pull/142759.
All HIR attributes, including parsed and not yet parsed, will now be rendered as outer attributes by `rustc_hir_pretty`. The original style of the corresponding AST attribute(s) is not relevant for pretty printing, only for diagnostics.
r? ````@jdonszelmann````
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Normally LLVM and rustc agree about what features are implied by
target-cpu, but for NVPTX, LLVM considers sm_* and ptx* features to be
exclusive, which makes sense for codegen purposes. But in Rust, we want
to think of them as:
sm_{sver} means that the target supports the hardware features of sver
ptx{pver} means the driver supports PTX ISA pver
Intrinsics usually require a minimum sm_{sver} and ptx{pver}.
Prior to this commit, -Ctarget-cpu=sm_70 would activate only sm_70 and
ptx60 (the minimum PTX version that supports sm_70, which maximizes
driver compatibility). With this commit, it also activates all the
implied target features (sm_20, ..., sm_62; ptx32, ..., ptx50).
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Add target features for sm_* and ptx*, both of which form a partial
order, but cannot be combined to a single partial order. These mirror
the LLVM target features, but we do not provide LLVM target
processors (which imply both an sm_* and ptx* feature).
Add some documentation for the nvptx target.
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Only traverse reachable blocks in JumpThreading.
Fixes https://github.com/rust-lang/rust/issues/131451
We only compute loop headers for reachable blocks. We shouldn't try to perform an opt on unreachable blocks anyway.
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Improve diagnostics for `concat_bytes!` with C string literals
Use the same error as other invalid types for `concat_bytes!`, rather
than using `ConcatCStrLit` from `concat!`. Also add more information
with a note about why this doesn't work, and a suggestion to use a
null-terminated byte string instead.
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r=Manishearth,Urgau
Add diagnostic items for Clippy
Clippy still uses some paths to access items from the standard library. Adding the missing diagnostic items allows removing the last remaining paths.
Closes rust-lang/rust-clippy#5393
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error on calls to ABIs that cannot be called
We recently added `extern "custom"`, which cannot be called using a rust call expression. But there are more ABIs that can't be called in that way, because the call does not semantically make sense.
More details are in https://github.com/rust-lang/rust/issues/140566#issuecomment-2846205457
r? `@workingjubilee`
try-job: x86_64-gnu-llvm-19-3
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Marks ADT live if it appears in pattern
Marks ADT live if it appears in pattern, it implies the construction of the ADT.
1. Then we can detect unused private ADTs impl `Default`, without special logics for `Default` and other std traits.
2. We can also remove `rustc_trivial_field_reads` on `Default`, and the logic in `should_ignore_item` (introduced by rust-lang/rust#126302).
Fixes rust-lang/rust#120770
Extracted from rust-lang/rust#128637.
r? `@petrochenkov`
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Rollup of 9 pull requests
Successful merges:
- rust-lang/rust#142331 (Add `trim_prefix` and `trim_suffix` methods for both `slice` and `str` types.)
- rust-lang/rust#142491 (Rework #[cold] attribute parser)
- rust-lang/rust#142494 (Fix missing docs in `rustc_attr_parsing`)
- rust-lang/rust#142495 (Better template for `#[repr]` attributes)
- rust-lang/rust#142497 (Fix random failure when JS code is executed when the whole file was not read yet)
- rust-lang/rust#142575 (Ensure copy* intrinsics also perform the static self-init checks)
- rust-lang/rust#142650 (Refactor Translator)
- rust-lang/rust#142713 (mbe: Refactor transcription)
- rust-lang/rust#142755 (rustdoc: Remove `FormatRenderer::cache`)
r? `@ghost`
`@rustbot` modify labels: rollup
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Some symbol and PathRoot cleanups
I'm looking into unifying how we join and print paths. Here are some preliminary cleanups.
r? ``@petrochenkov``
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correct template for `#[align]` attribute
Tracking issue: https://github.com/rust-lang/rust/issues/82232
related: https://github.com/rust-lang/rust/pull/142507
I didn't fully understand what `template!` did, clearly. An empty `#[align]` attribute was still rejected later, but without this change it does get suggested in certain cases.
I've also updated some outdated references to `#[repr(align)]` on functions.
r? ``@jdonszelmann``
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Ensure copy* intrinsics also perform the static self-init checks
fixes rust-lang/rust#142532
r? `@RalfJung`
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Better template for `#[repr]` attributes
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Alternative candidates for a trait implementation are not printed when
the trait has a diagnostic name, to avoid printing alternatives for
common stdlib traits such as `Copy` or `Debug`. However, this affects
all traits for which a diagnostic item is added.
Here, the list of alternatives candidates for `Step` does not seem
useful, and `Step` is unstable, so this will not be missed.
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