`lower_generic_bound_predicate` calls `lower_ident`, and then passes the
lowered ident into `new_named_lifetime`, which lowers it again. This
commit avoids the first lowering. This requires adding a `lower_ident`
call on a path that doesn't involve `new_named_lifetime`.
`LoweringContext::new_named_lifetime` lowers the `ident` passed in. Both
of its call sites *also* lower `ident` *before* passing it in. I.e. both
call sites cause the ident to be lowered twice. This commit removes the
lowering at the two call sites, so the ident is only lowered once.
Rollup of 5 pull requests
Successful merges:
- #136293 (document capacity for ZST as example)
- #136359 (doc all differences of ptr:copy(_nonoverlapping) with memcpy and memmove)
- #136816 (refactor `notable_traits_button` to use iterator combinators instead of for loop)
- #138552 (Misc print request handling cleanups + a centralized test for print request stability gating)
- #138573 (Make `_Unwind_Action` a type alias, not enum)
r? `@ghost`
`@rustbot` modify labels: rollup
Make `_Unwind_Action` a type alias, not enum
It's bitflags in practice, so an enum is unsound, as an enum must only have the described values. The x86_64 psABI declares it as a `typedef int _Unwind_Action`, which seems reasonable. I made a newtype first but that was more annoying than just a typedef. We don't really use this value for much other than a short check.
I ran `x check library --target aarch64-unknown-linux-gnu,x86_64-pc-windows-gnu,x86_64-fortanix-unknown-sgx,x86_64-unknown-haiku,x86_64-unknown-fuchsi
a,x86_64-unknown-freebsd,x86_64-unknown-dragonfly,x86_64-unknown-netbsd,x86_64-unknown-openbsd,x86_64-unknown-redox,riscv64-linux-android,armv7-unknown-freebsd` (and some more but they failed to build for other reasons :D)
fixes#138558
r? workingjubilee have fun
Misc print request handling cleanups + a centralized test for print request stability gating
I was working on implementing `--print=supported-crate-types`, then I noticed some things that were mildly annoying me, so I pulled out these changes. In this PR:
- First commit adds a centralized test `tests/ui/print/stability.rs` that is responsible for exercising stability gating of the print requests.
- AFAICT we didn't have any test that systematically checks this.
- I coalesced `tests/ui/feature-gates/feature-gate-print-check-cfg.rs` (for `--print=check-cfg`) into this test too, since `--print=check-cfg` is only `-Z unstable-options`-gated like other unstable print requests, and is not additionally feature-gated. cc ``@Urgau`` in case you have any concerns.
- Second commit alphabetically sorts the `PrintKind` enum for consistency because the `PRINT_KINDS` list (using the enum) is *already* alphabetically sorted.
- Third commit pulls out two helpers:
1. A helper `check_print_request_stability` for checking stability of print requests and the diagnostics for using unstable print requests without `-Z unstable-options`, to avoid repeating the same logic over and over.
2. A helper `emit_unknown_print_request_help` for the unknown print request diagnostics to make print request collection control flow more obvious.
- Fourth commit renames `PrintKind::{TargetSpec,AllTargetSpecs}` to `PrintKind::{TargetSpecJson,AllTargetSpecsJson}` to better reflect their actual print names, `--print={target-spec-json,all-target-specs-json}`.
r? ``@nnethercote`` (or compiler/reroll)
refactor `notable_traits_button` to use iterator combinators instead of for loop
~Small cleanup.
Use `Iterator::any` instead of `for` loop with `predicate = true;`.
I think this makes the code more readable... and also has the additional benefit of short-circuiting the iterator when a notable trait is found (a `break` statement was missing in the `for` loop version, I think). Probably won't be significant enough to show on perf results, though.~
Three commits, each attempting to optimize `notable_trait_buttons` by a little bit.
document capacity for ZST as example
The main text already covers this, although it provides weaker guarantees, but I think an example in the right spot does not hurt. Fixes#80747
Add `From<{integer}>` for `f16`/`f128` impls
This PR adds `impl From<{bool,i8,u8}> for f16` and `impl From<{bool,i8,u8,i16,u16,i32,u32}> for f128`.
The `From<{i64,u64}> for f128` impls are left commented out as adding them would allow using `f128` on stable before it is stabilised like in the following example:
```rust
fn f<T: From<u64>>(x: T) -> T { x }
fn main() {
let x = f(1.0); // the type of the literal is inferred to be `f128`
}
```
None of the impls added in this PR have this issue as they are all, at minimum, also implemented by `f64`.
This PR will need a crater run for the `From<{i32,u32}>` impls, as `f64` is no longer the only float type to implement them (similar to the cause of #125198).
cc `@bjoernager`
r? `@tgross35`
Tracking issue: #116909
This commit fixes an internal compiler error (ICE) that occurs when
rustdoc attempts to process macros with a remapped filename. The issue
arose during macro expansion when the `--remap-path-prefix` option was
used.
Instead of passing remapped filenames through, which would trigger the
"attempted to remap an already remapped filename" panic, we now
extract the original local path from remapped filenames before
processing them.
A test case has been added to verify this behavior.
Fixes#138520
Signed-off-by: Charalampos Mitrodimas <charmitro@posteo.net>
It determines if a function should have any `inline` attributes checked.
For `ItemKind::Fn` it returns true or false depending on the details of
the function; for anything other item kind it returns *true*. This
latter case should instead be *false*. (In the nearby and similar
functions `is_relevant_impl` and `is_relevant_trait` the non-function
cases return false.)
The effect of this is that non-functions are no longer checked. But
rustc already disallows `inline` on any non-function items. So if
anything its a tiny performance win, because that was useless anyway.
It determines if a function should have any `inline` attributes checked.
For `ItemKind::Fn` it returns true or false depending on the details of
the function; for anything other item kind it returns *true*. This
latter case should instead be *false*. (In the nearby and similar
functions `is_relevant_impl` and `is_relevant_trait` the non-function
cases return false.)
The effect of this is that non-functions are no longer checked. But
rustc already disallows `inline` on any non-function items. So if
anything its a tiny performance win, because that was useless anyway.
It's bitflags in practice, so an enum is unsound, as an enum must only
have the described values. The x86_64 psABI declares it as a `typedef
int _Unwind_Action`, which seems reasonable. I made a newtype first but
that was more annoying than just a typedef. We don't really use this
value for much other than a short check.
- Events are going to become quite important for Networking, so needed
owned abstractions.
- Switch to OwnedEvent abstraction for Exit boot services event.
Signed-off-by: Ayush Singh <ayush@beagleboard.org>
Sometimes, in doc comments, there are 3 spaces + 1 instead of 4 spaces + 1.
To make it coherent with the rest of the clippy codebase, I `fd -t f -X sed -E -i 's,/// (\S),/// \1,g'` and manually verified and fixed the relevant part of code that had bad indentation.
(https://github.com/rust-lang/rust),
`ErrorGuaranteed` was replaced by fatal errors.
As a result, `tcx.analysis()` now aborts directly
instead of returning an error guard.
To accommodate this change, this update replaces
`tcx.analysis()` with `typeck()`
to perform type checking in the example.
Start removing `rustc_middle::hir::map::Map`
Following commit f86f7ad from pull request #136466
in the Rust project
(https://github.com/rust-lang/rust),
some methods in `Map` were moved to `TyCtxt`.
This update reimplements `rustc-drive-example.rs`,
`rustc-driver-interacting-with-the-ast.rs`,
and `rustc-interface-example.rs` using the new
versions of these methods, ensuring compatibility
with the nightly-2025-03-08 toolchain.
close#12157
`needless_return` sometimes makes incorrect suggestions by omitting
necessary enclosing parentheses. This PR resolves the issue by using
`clippy_utils::sugg::Sugg`.
changelog: [`needless_return`]: now makes correct suggestions which
require enclosing parentheses
Fixes https://github.com/rust-lang/rust-clippy/issues/12163
I decided to initially make this a restriction lint because it felt a
bit niche and opinionated to be a warn-by-default style lint. It may be
appropriate as a style lint if the standard or convention *is* to use
`\` as doc comment linebreaks - not sure if they are!
The wording on the help message could be improved, as well as the name
of the lint itself since it's a bit wordy - suggestions welcome.
This lint works on both `///` and `//!` doc comments.
changelog: new lint: `doc_comment_double_space_linebreaks`
Optimize multi-char string patterns
Uses specialization for `[T]::contains` from #130991 to optimize multi-char patterns in string searches.
Requesting a perf run to see if this actually has an effect 🙏
(I think that adding `char` to the list of types for which the `SliceContains` is specialized is a good idea, even if it doesn't show up on perf - might be helpful for downstream users)
To correspond to their actual print request names, `target-spec-json`
and `all-target-specs-json`, and for consistency with other print name
<-> print kind mappings.
I can't find any dedicated tests that actually exercises the stability
gating (via `-Z unstable-options`) of print requests, so here's a
dedicated one.
I coalesced `tests/ui/feature-gates/feature-gate-print-check-cfg.rs`
into this test, because AFAICT that print request is not feature gated,
but only `-Z unstable-options`-gated just like other unstable print
requests.
