librustdoc: create a helper for separating elements of an iterator instead of implementing it multiple times
This implements something similar to [`Itertools::format`](https://docs.rs/itertools/latest/itertools/trait.Itertools.html#method.format), but on `Fn`s returning iterators instead of directly on iterators, to allow implementing `Display` without the use of a `Cell` (to handle the possibility of `fmt` being called multiple times while receiving `&self`).
~This is WIP, I just want to get a perf run first to see if the regression I saw in #135494 is fixed~
This was originally part of #135494 , but originally caused a perf regression that was since fixed:
7d5ae1863a/src/librustdoc/html/format.rs (L507)
Allow using named consts in pattern types
This required a refactoring first: I had to stop using `hir::Pat`in `hir::TyKind::Pat` and instead create a separate `TyPat` that has `ConstArg` for range ends instead of `PatExpr`. Within the type system we should be using `ConstArg` for all constants, as otherwise we'd be maintaining two separate const systems that could diverge. The big advantage of this PR is that we now inherit all the rules from const generics and don't have a separate system. While this makes things harder for users (const generic rules wrt what is allowed in those consts), it also means we don't accidentally allow some things like referring to assoc consts or doing math on generic consts.
Extract `core::ffi` primitives to a separate (internal) module
### Introduce library/core/src/ffi/primitives.rs
The regex preprocessing for PR #133944 would be more robust if the relevant types from core/src/ffi/mod.rs were first moved to library/core/src/ffi/primitives.rs, then there isn't a need to deal with traits / c_str / va_list / whatever might wind up in that module in the future
r? `@tgross35`
Implement unstable `new_range` feature
Switches `a..b`, `a..`, and `a..=b` to resolve to the new range types.
For rust-lang/rfcs#3550
Tracking issue #123741
also adds the re-export that was missed in the original implementation of `new_range_api`
Rollup of 6 pull requests
Successful merges:
- #134807 (fix(rustdoc): always use a channel when linking to doc.rust-lang.org)
- #134814 (Add `kl` and `widekl` target features, and the feature gate)
- #135836 (bootstrap: only build `crt{begin,end}.o` when compiling to MUSL)
- #136022 (Port ui/simd tests to use the intrinsic macro)
- #136309 (set rustc dylib on manually constructed rustc command)
- #136462 (mir_build: Simplify `lower_pattern_range_endpoint`)
r? `@ghost`
`@rustbot` modify labels: rollup
bootstrap: only build `crt{begin,end}.o` when compiling to MUSL
only MUSL needs those objects and trying to compile them to other targets, e.g. Windows or macOS, will produce C compilation errors
check the target before shelling out to the C compiler and tweak `make_run` to skip the actual C compilation when the target is not MUSL
fixes#135782
see the linked issue for additional context
fix(rustdoc): always use a channel when linking to doc.rust-lang.org
Closes#131971
I manually checked the resulting links
One issue is that this will create `nightly/...` links in places that formerly linked to stable, is that ok ? (the `slice` and `array` links in the search help notably)
Rollup of 8 pull requests
Successful merges:
- #136289 (OnceCell & OnceLock docs: Using (un)initialized consistently)
- #136299 (Ignore NLL boring locals in polonius diagnostics)
- #136411 (Omit argument names from function pointers that do not have argument names)
- #136430 (Use the type-level constant value `ty::Value` where needed)
- #136476 (Remove generic `//@ ignore-{wasm,wasm32,emscripten}` in tests)
- #136484 (Notes on types/traits used for in-memory query caching)
- #136493 (platform-support: document CPU baseline for x86-32 targets)
- #136498 (Update books)
r? `@ghost`
`@rustbot` modify labels: rollup
Update books
## rust-lang/book
2 commits in fa312a343fbff01bc6cef393e326817f70719813..e2fa4316c5a7c0d2499c5d6b799adcfad6ef7a45
2025-02-03 15:02:07 UTC to 2025-02-01 17:33:39 UTC
- Add missing word in ch17-04-streams.md (rust-lang/book#4218)
- Fix typo in ch5.3 and in CONTRIBUTING.md (rust-lang/book#4216)
## rust-lang/edition-guide
2 commits in 4ed5a1a4a2a7ecc2e529a5baaef04f7bc7917eda..f56aecc3b036dff16404b525a83b00f911b9bbea
2025-02-03 17:14:16 UTC to 2025-01-31 17:44:00 UTC
- Rustc{En,De}codable has been removed (rust-lang/edition-guide#353)
- Remove rustfmt-overflow-delimited-expr (rust-lang/edition-guide#357)
## rust-lang/nomicon
3 commits in bc2298865544695c63454fc1f9f98a3dc22e9948..336f75835a6c0514852cc65aba9a698b699b13c8
2025-02-02 10:06:30 UTC to 2025-02-02 08:35:20 UTC
- Improve grammar in exotic-sizes (rust-lang/nomicon#452)
- other-reprs: Add details for n!=1 repr(packed) (rust-lang/nomicon#460)
- Use `()` instead of `[u8; 0]` in opaque type (rust-lang/nomicon#456)
## rust-lang/reference
3 commits in 93b921c7d3213d38d920f7f905a3bec093d2217d..4249fb411dd27f945e2881eb0378044b94cee06f
2025-01-31 03:43:07 UTC to 2025-01-29 04:17:34 UTC
- Add Spec Identifier Syntax to expressions.md and subchapters (rust-lang/reference#1591)
- Exclude the test summary from the search index (rust-lang/reference#1723)
- Spec inline assembly tests (rust-lang/reference#1648)
## rust-lang/rust-by-example
1 commits in 054259ed1bf01cdee4309ee764c7e103f6df3de5..743766929f1e53e72fab74394ae259bbfb4a7619
2025-02-02 19:53:31 UTC to 2025-02-02 19:53:31 UTC
- Spanish translation to 1:2100 (rust-lang/rust-by-example#1910)
platform-support: document CPU baseline for x86-32 targets
Also fixes the footnote for i686-unknown-hurd-gnu (which has the bad case of the x87 issue since it uses a non-SSE baseline) and adds the missing footnote for i686-unknown-redox. Both of those targets break our usual pattern by not using the Pentium 4 baseline, but fixing that is a much larger change that I will not pursue (see [Zulip](https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/x86-32.20target.20names)).
Cc ``@bjorn3``
Ignore NLL boring locals in polonius diagnostics
Another easy one ``@jackh726`` (the diff is inflated by blessed test expectations don't worry :)
NLLs don't compute liveness for boring locals, and therefore cannot find them in causes explaining borrows. In polonius, we don't have this liveness optimization (we may be able to do something partially similar in the future, e.g. for function parameters and the like), so we do encounter these in diagnostics even though we don't want to. This PR:
- restructures the polonius context into per-phase data, in spirit as you requested in an earlier review
- stores the locals NLLs would consider boring into the errors/diagnostics data
- ignores these if a boring local is found when trying to explain borrows
This PR fixes around 80 cases of diagnostics differences between `-Zpolonius=next` and NLLs. I've also added explicit revisions to a few polonius tests (both for the in-tree implementation as well as the datalog implementation -- even if we'll eventually remove them). I didn't do this for all the "dead" expectations that were removed from #136112 for that same reason, it's fine. I'll soon/eventually add explicit revisions where they're needed: there's only a handful of tests left to fix.
r? ``@jackh726``
Explicitly choose x86 softfloat/hardfloat ABI
Part of https://github.com/rust-lang/rust/pull/135408:
Instead of choosing this based on the target features listed in the target spec, make that choice explicit.
All built-in targets are being updated here; custom (JSON-defined) x86 (32bit and 64bit) softfloat targets need to explicitly set `rustc-abi` to `x86-softfloat`.
[`compiletest`-related cleanups 1/7] Cleanup `is_rustdoc` logic and remove a useless path join in rustdoc-json runtest logic
Reference for overall changes: https://github.com/rust-lang/rust/pull/136437
Part **1** of **7** of the *`compiletest`-related cleanups* PR series.
### Summary
- Don't match on path when we already have test suite names.
- Remove a useless path join.
r? bootstrap (or compiler)
Remove a footgun-y feature / relic of the past from the compiletest DSL
The compiletest DSL still features a historical remnant from the time when its directives were merely prefixed with `//` instead of `//`@`` when unknown directive names weren't rejected since they could just as well be part of prose:
As an "optimization", it stops looking for directives once it stumbles upon a line which starts with either `fn` or `mod`. This is super footgun-y as it obviously leads to any seeming compiletest directives below `fn` and `mod` items getting completely ignored.
See #136403 for a practical example. As well the assembly test updated in this PR.
~~Blocked on #136403.~~ (merged)
Target modifiers (special marked options) are recorded in metainfo
Target modifiers (special marked options) are recorded in metainfo and compared to be equal in different linked crates.
PR for this RFC: https://github.com/rust-lang/rfcs/pull/3716
Option may be marked as `TARGET_MODIFIER`, example: `regparm: Option<u32> = (None, parse_opt_number, [TRACKED TARGET_MODIFIER]`.
If an TARGET_MODIFIER-marked option has non-default value, it will be recorded in crate metainfo as a `Vec<TargetModifier>`:
```
pub struct TargetModifier {
pub opt: OptionsTargetModifiers,
pub value_name: String,
}
```
OptionsTargetModifiers is a macro-generated enum.
Option value code (for comparison) is generated using `Debug` trait.
Error example:
```
error: mixing `-Zregparm` will cause an ABI mismatch in crate `incompatible_regparm`
--> $DIR/incompatible_regparm.rs:10:1
|
LL | #![crate_type = "lib"]
| ^
|
= help: the `-Zregparm` flag modifies the ABI so Rust crates compiled with different values of this flag cannot be used together safely
= note: `-Zregparm=1` in this crate is incompatible with `-Zregparm=2` in dependency `wrong_regparm`
= help: set `-Zregparm=2` in this crate or `-Zregparm=1` in `wrong_regparm`
= help: if you are sure this will not cause problems, use `-Cunsafe-allow-abi-mismatch=regparm` to silence this error
error: aborting due to 1 previous error
```
`-Cunsafe-allow-abi-mismatch=regparm,reg-struct-return` to disable list of flags.
CompileTest: Add Directives to Ignore `arm-unknown-*` Targets
In #134626, I want to ignore `arm-unknown-*` targets because the LLVM IR for those looks very different compared to other targets: https://rust.godbolt.org/z/ssYMhdv4x.
I can use `ignore-arm` but, I think, it would exclude large number of Apple devices.
So this PR adds a few directives to ignore `arm-unknown-*` targets specifically.
