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Clean up and harden various methods around trait substs
r? `@lcnr`
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Co-authored-by: lcnr <rust@lcnr.de>
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Co-authored-by: lcnr <rust@lcnr.de>
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sites that used the wrong amount
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Match and enforce crate and slug names
Some of these were in the wrong place or had a name that didn't match.
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Rollup of 9 pull requests
Successful merges:
- #104420 (Fix doc example for `wrapping_abs`)
- #104499 (rustdoc JSON: Use `Function` everywhere and remove `Method`)
- #104500 (`rustc_ast`: remove `ref` patterns)
- #104511 (Mark functions created for `raw-dylib` on x86 with DllImport storage class)
- #104595 (Add `PolyExistentialPredicate` type alias)
- #104605 (deduplicate constant evaluation in cranelift backend)
- #104628 (Revert "Update CI to use Android NDK r25b")
- #104662 (Streamline deriving on packed structs.)
- #104667 (Revert formatting changes of a test)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Revert formatting changes of a test
See https://github.com/rust-lang/rust/pull/99935/files#r1027259119
cc ``@CAD97``
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r=jackh726
Streamline deriving on packed structs.
The current approach to field accesses in derived code:
- Normal case: `&self.0`
- In a packed struct that derives `Copy`: `&{self.0}`
- In a packed struct that doesn't derive `Copy`: `let Self(ref x) = *self`
The `let` pattern used in the third case is equivalent to the simpler field access in the first case. This commit changes the third case to use a field access.
The commit also combines two boolean arguments (`is_packed` and `always_copy`) into a single field (`copy_fields`) earlier, to save passing both around.
r? ``@jackh726``
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Revert "Update CI to use Android NDK r25b"
This reverts commit bf7f1ca316a249cf99d722d79a0db12fef687142 (pull request #102332).
The relevant discussion can be found in #103673, where it was agreed that more time is needed to warn the community of the upcoming breakage.
This PR is for the `master` branch, where a conflict was recently introduced due to 6d8160261ff3aee3b6eaacc37ac96cafff530980. The conflict is in `cc_detect.rs`, where the code that corrects the target triple was moved to a new function called `ndk_compiler()`. This puts the old logic in the `ndk_compiler` function, and assumes that it works properly in the other location where that code is being called. I would appreciate review from ``@pietroalbini`` to understand how we can test that the reverted logic is also suitable for the additional use case (seems to be related to setting `cc` and `cxx`). I've confirmed already that with these changes I can compile for `armv7-linux-androideabi`, `aarch64-linux-android`, `i686-linux-android`, and `x86_64-linux-android` using `x.py`.
A separate revert for the `beta` branch will be required, since the original change has already made it to beta. The beta revert is available at https://github.com/alex-pinkus/rust/commit/3fa0d94674fbe37090ebe44ac1f06e2233f3121e, but I'm not sure of the process for staging that PR.
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Add `PolyExistentialPredicate` type alias
Wrapping `ExistentialPredicate`s in a binder is very common, and this alias already exists for the `PolyExistential{TraitRef,Projection}` types.
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Mark functions created for `raw-dylib` on x86 with DllImport storage class
Fix for #104453
## Issue Details
On x86 Windows, LLVM uses 'L' as the prefix for any private global symbols (`PrivateGlobalPrefix`), so when the `raw-dylib` feature creates an undecorated function symbol that begins with an 'L' LLVM misinterprets that as a private global symbol that it created and so fails the compilation at a later stage since such a symbol must have a definition.
## Fix Details
Mark the function we are creating for `raw-dylib` with `DllImport` storage class (this was already being done for MSVC at a later point for `callee::get_fn` but not for GNU (due to "backwards compatibility")): this will cause LLVM to prefix the name with `__imp_` and so it won't mistake it for a private global symbol.
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rustdoc JSON: Use `Function` everywhere and remove `Method`
Closes #100259
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Support using `Self` or projections inside an RPIT/async fn
I reuse the same idea as https://github.com/rust-lang/rust/pull/103449 to use variances to encode whether a lifetime parameter is captured by impl-trait.
The current implementation of async and RPIT replace all lifetimes from the parent generics by `'static`. This PR changes the scheme
```rust
impl<'a> Foo<'a> {
fn foo<'b, T>() -> impl Into<Self> + 'b { ... }
}
opaque Foo::<'_a>::foo::<'_b, T>::opaque<'b>: Into<Foo<'_a>> + 'b;
impl<'a> Foo<'a> {
// OLD
fn foo<'b, T>() -> Foo::<'static>::foo::<'static, T>::opaque::<'b> { ... }
^^^^^^^ the `Self` becomes `Foo<'static>`
// NEW
fn foo<'b, T>() -> Foo::<'a>::foo::<'b, T>::opaque::<'b> { ... }
^^ the `Self` stays `Foo<'a>`
}
```
There is the same issue with projections. In the example, substitute `Self` by `<T as Trait<'b>>::Assoc` in the sugared version, and `Foo<'_a>` by `<T as Trait<'_b>>::Assoc` in the desugared one.
This allows to support `Self` in impl-trait, since we do not replace lifetimes by `'static` any more. The same trick allows to use projections like `T::Assoc` where `Self` is allowed. The feature is gated behind a `impl_trait_projections` feature gate.
The implementation relies on 2 tweaking rules for opaques in 2 places:
- we only relate substs that correspond to captured lifetimes during TypeRelation;
- we only list captured lifetimes in choice region computation.
For simplicity, I encoded the "capturedness" of lifetimes as a variance, `Bivariant` vs `Invariant` for unused vs captured lifetimes. The `variances_of` query used to ICE for opaques.
Impl-trait that do not reference `Self` or projections will have their variances as:
- `o` (invariant) for each parent type or const;
- `*` (bivariant) for each parent lifetime --> will not participate in borrowck;
- `o` (invariant) for each own lifetime.
Impl-trait that does reference `Self` and/or projections will have some parent lifetimes marked as `o` (as the example above), and participate in type relation and borrowck. In the example above, `variances_of(opaque) = ['_a: o, '_b: *, T: o, 'b: o]`.
r? types
cc `@compiler-errors` , as you asked about the issue with `Self` and projections.
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Factor out `conservative_is_privately_uninhabited`
After #102660 there is no more need for `conservative_is_privately_uninhabited`.
r? `@oli-obk`
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The current approach to field accesses in derived code:
- Normal case: `&self.0`
- In a packed struct that derives `Copy`: `&{self.0}`
- In a packed struct that doesn't derive `Copy`: `let Self(ref x) = *self`
The `let` pattern used in the third case is equivalent to the simpler
field access in the first case. This commit changes the third case to
use a field access.
The commit also combines two boolean arguments (`is_packed` and
`always_copy`) into a single field (`copy_fields`) earlier, to save
passing both around.
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Pass 128-bit C-style enum enumerator values to LLVM
Pass the full 128 bits of C-style enum enumerators through to LLVM. This means that debuginfo for C-style repr128 enums is now emitted correctly for DWARF platforms (as compared to not being correctly emitted on any platform).
Tracking issue: #56071
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rustdoc: remove unused JS IIFE from main.js
This [IIFE] made sense when it was added in deaf5e200e79a75ac57d3f0952f6758a38168e52 and there was a local variable scoped to it, but now it calls a function, but declares nothing.
[IIFE]: https://developer.mozilla.org/en-US/docs/Glossary/IIFE "immediately invoked function expression"
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Add a detailed note for missing comma typo w/ FRU syntax
Thanks to `@pierwill` for working on this with me!
Fixes #104373, perhaps `@alice-i-cecile` can comment on the new error for the example provided on that issue -- feedback is welcome.
```
error[E0063]: missing field `defaulted` in initializer of `Outer`
--> $DIR/multi-line-fru-suggestion.rs:14:5
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LL | Outer {
| ^^^^^ missing `defaulted`
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note: this expression may have been misinterpreted as a `..` range expression
--> $DIR/multi-line-fru-suggestion.rs:16:16
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LL | inner: Inner {
| ________________^
LL | | a: 1,
LL | | b: 2,
LL | | }
| |_________^ this expression does not end in a comma...
LL | ..Default::default()
| ^^^^^^^^^^^^^^^^^^^^ ... so this is interpreted as a `..` range expression, instead of functional record update syntax
help: to set the remaining fields from `Default::default()`, separate the last named field with a comma
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LL | },
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error: aborting due to previous error
For more information about this error, try `rustc --explain E0063`.
```
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update ntapi dep to remove future-incompat warning
This fixes warning https://github.com/rust-lang-ci/rust/actions/runs/3477235400/jobs/5813202075#step:25:217
`warning: the following packages contain code that will be rejected by a future version of Rust: ntapi v0.3.7`
by upgrading `sysinfo` version (https://github.com/GuillaumeGomez/sysinfo/blob/master/CHANGELOG.md#0267)
There was some breaking changes in `sysinfo`:
* 0.25.0 (System::refresh_cpu behaviour changed: it only computes CPU usage and doesn't retrieve CPU frequency.) not affected?
* 0.26.0 (Switch memory unit from kilobytes to bytes) fixed.
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Migrate kdb style to CSS variables
r? `@notriddle`
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r=GuillaumeGomez
rustdoc: use real buttons for scrape examples controls
This makes the expand and switch controls keyboard-accessible.
Preview: https://notriddle.com/notriddle-rustdoc-demos/scrape-examples-button/test_dingus/fn.test.html
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update Miri
r? `@thomcc` for the lib changes (removing a `cfg(miri)` that is no longer needed)
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make align_offset always work on no-provenance pointers
Fixes https://github.com/rust-lang/miri/issues/2682
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Check fat pointer metadata compatibility modulo regions
Regions don't really mean anything anyways during hir typeck.
If this `erase_regions` makes anyone nervous, it's probably equally valid to just equate the types using a type relation, but regardless we should _not_ be using strict type equality while region variables are present.
Fixes #103384
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Minimal implementation of implicit deref patterns for Strings
cc `@compiler-errors` `@BoxyUwU` https://github.com/rust-lang/lang-team/issues/88 #87121
~~I forgot to add a feature gate, will do so in a minute~~ Done
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fuzzypixelz:fix/attempt-to-substract-with-overflow, r=compiler-errors
Fix substraction with overflow in `wrong_number_of_generic_args.rs`
Fixes #104287
This issue happens in the `suggest_moving_args_from_assoc_fn_to_trait_for_qualified_path` function, which seems to run before the error checking facilities can catch an invalid use of generic arguments. Thus we get a subtraction with overflow because the code implicitly assumes that the source program makes sense (or is this assumption not true even if the program is correct?).
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`VecDeque::resize` should re-use the buffer in the passed-in element
Today it always copies it for *every* appended element, but one of those clones is avoidable.
This adds `iter::repeat_n` (https://github.com/rust-lang/rust/issues/104434) as the primitive needed to do this. If this PR is acceptable, I'll also use this in `Vec` rather than its custom `ExtendElement` type & infrastructure that is harder to share between multiple different containers:
https://github.com/rust-lang/rust/blob/101e1822c3e54e63996c8aaa014d55716f3937eb/library/alloc/src/vec/mod.rs#L2479-L2492
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This reverts commit bf7f1ca316a249cf99d722d79a0db12fef687142.
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