Starting with Rust version 1.82.0, the compiler generates similar code
with and without the `with_ref` cfg:
```rust
fn f(x: impl IntoIterator<Item = String>) {
for y in x { println!("{y}"); }
}
fn main() {
#[cfg(with_ref)]
let a = ["foo", "bar"].iter().map(|&s| s.to_string());
#[cfg(not(with_ref))]
let a = ["foo", "bar"].iter().map(|s| s.to_string());
f(a);
}
```
The generated code is strictly identical with `-O`, and identical modulo
some minor reordering without.
changelog: [`inefficient_to_string`]: do not trigger for Rust ≥ 1.82.0
Starting with Rust version 1.82.0, the compiler generates similar code with
and without the `with_ref` cfg:
```rust
fn f(x: impl IntoIterator<Item = String>) {
for y in x { println!("{y}"); }
}
fn main() {
#[cfg(with_ref)]
let a = ["foo", "bar"].iter().map(|&s| s.to_string());
#[cfg(not(with_ref))]
let a = ["foo", "bar"].iter().map(|s| s.to_string());
f(a);
}
```
The generated code is strictly identical with `-O`, and identical modulo
some minor reordering without.
Rollup of 8 pull requests
Successful merges:
- rust-lang/rust#146593 (Allow specifying multiple bounds for same associated item, except in trait objects)
- rust-lang/rust#147177 ([DebugInfo] Fix MSVC tuple child creation)
- rust-lang/rust#147195 (iter repeat: add tests for new count and last behavior)
- rust-lang/rust#147202 (Swap order of `resolve_coroutine_interiors` and `handle_opaque_type_uses`)
- rust-lang/rust#147204 (Refactor ArrayWindows to use a slice)
- rust-lang/rust#147219 (Add proper error handling for closure in impl)
- rust-lang/rust#147226 (include `outer_inclusive_binder` of pattern types)
- rust-lang/rust#147230 (Fix typo in 'unfulfilled_lint_expectation' to plural)
r? `@ghost`
`@rustbot` modify labels: rollup
Most new API has an associated ACP that is useful to reference, but it
doesn't appear anywhere on the template for new tracking issues. Update
this template to include a link to the ACP.
[DebugInfo] Fix MSVC tuple child creation
This is a fix for the debugger visualizer scripts
For whatever reason, using `CreateChildAtOffset` on the child element sometimes caused issues with pointers (and maybe some other types). The resulting child's memory would be a block 4 bytes too far forward. Creating the child off of the parent `valobj` and using the type definition to get the correct offset seems to fix that.
Before:
<img width="489" height="136" alt="image" src="https://github.com/user-attachments/assets/fb4cb95c-f199-49a6-8eba-6d3ff486b69a" />
After:
<img width="518" height="145" alt="image" src="https://github.com/user-attachments/assets/3f50dbc3-19ca-4fd8-87c5-b4be295f6e7c" />
This shouldn't affect any tests as we don't run debuginfo tests for MSVC afaik
Instead of calling `span_lint_and_*` in multiple places, call
`span_lint_and_then` once and then use the `Diag` methods.
Diff best viewed with whitespace ignored
changelog: none
This might be due to a low edition (< 2024) or too low a MSRV. In this
case, we will suggest only `match`.
Fixesrust-lang/rust-clippy#15744
changelog: [`unnecessary_unwrap`]: do not suggest using `if let` chains
if this is not supported with the current edition or MSRV
changelog:[`collapsible_if`]: Do not suggest using `if let` if this is
not supported with the current edition or MSRV
Don't create a top-level `true` directory when running UI tests
The funny thing about writing `-Cincremental=true` is that it *does* enable incremental compilation ... using an incremental compilation dir of `./true`.
And for UI tests, that ends up creating a `true` directory in the repository root, which is annoying.
Fortunately, compiletest has an existing `//@ incremental` directive that takes care of creating an empty incremental directory, and passing it to `-Cincremental`.
---
I have manually checked that reverting rust-lang/rust#146649 still causes the updated test to fail.
Remove `no-remap-src-base` from tests
Previously in the `//`-compiletest-directive times, `no-remap-src-base` was implemented as a special `no-*` directive parsing. In the migration from `//` -> `//`@`,` the `// no-remap-src-base` directive was lost, most likely because it had no effect -- the default is not remapping `src-base`.
So remove occurrences of `no-remap-src-base`, as these are not valid directives.
r? `@Zalathar` (since we discussed this on discord, or compiler)
Fix autodiff empty ret regression
closes https://github.com/rust-lang/rust/issues/147144
The two gsoc summer projects caused a bit of churn, which was to be expected, especially since we don't run autodiff in CI yet.
This adds a void return testcase that we should have had anyway, and fixes the regression.
r? `@Zalathar` (Just guessing since I've seen you in a few LLVM PRs and Oli is probably still busy. Feel free to reroll!)
remove outdated comment in (inner) `InferCtxt`
This comment seems to have stopped being relevant around 3 years ago after 9f95c605f8. A map? what map? :P
r? `@lcnr`
Replace `rustc_span::Span` with a stripped down version for librustdoc's highlighter
While profiling rustdoc's syntax highlighter, I noticed a lot of time being spent in the `Span` interner, due to the highlighter creating a lot of (new) spans.
Since the only data from the `Span` that we use is the `hi` and `lo` byte positions - I replaced the regular `Span` with a simple one with two fields, and in my benchmarks it seemed to make a big dent in the highlighter's perf, so thought I would see what the perf runner says.
compiletest: Pass around `DirectiveLine` instead of bare strings
This is an incremental step towards being able to clean up and centralize compiletest directive parsing.
My original plan was to add features to `DirectiveLine`, and then gradually migrate parsing code to use those features. However, that turned out to be impractical, because of how the existing directive parsers call each other. So instead this PR focuses on getting them to all take `DirectiveLine` instead of bare strings, to enable incremental work in the future.
Because this is part of an ongoing cleanup, I've prioritised clean diffs over nice code, because much of this code is going to be modified again when `DirectiveLine` is more capable.
r? jieyouxu
