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explain why CTFE/Miri perform truncation on shift offset
Closes https://github.com/rust-lang/miri/issues/1920
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Do not visit attributes in `ItemLowerer`.
By default, AST visitors visit expressions that appear in key-value attributes.
Those expressions should not be lowered to HIR, as they do not correspond to actually compiled code.
Since an attribute cannot produce meaningful HIR, just skip them altogether.
Fixes https://github.com/rust-lang/rust/issues/81886
Fixes https://github.com/rust-lang/rust/issues/90873
r? `@michaelwoerister`
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Print associated types on opaque `impl Trait` types
This PR generalizes #91021, printing associated types for all opaque `impl Trait` types instead of just special-casing for future.
before:
```
error[E0271]: type mismatch resolving `<impl Iterator as Iterator>::Item == u32`
```
after:
```
error[E0271]: type mismatch resolving `<impl Iterator<Item = usize> as Iterator>::Item == u32`
```
---
Questions:
1. I'm kinda lost in binders hell with this one. Is all of the `rebind`ing necessary?
2. Is there a map collection type that will give me a stable iteration order? Doesn't seem like TraitRef is Ord, so I can't just sort later..
3. I removed the logic that suppresses printing generator projection types. It creates outputs like this [gist](https://gist.github.com/compiler-errors/d6f12fb30079feb1ad1d5f1ab39a3a8d). Should I put that back?
4. I also added spaces between traits, `impl A+B` -> `impl A + B`. I quite like this change, but is there a good reason to keep it like that?
r? ````@estebank````
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Link with default MACOSX_DEPLOYMENT_TARGET if not otherwise specified.
This PR sets the MACOSX_DEPLOYMENT_TARGET environment variable during the linking stage to our default, if it is not specified. This way it matches the deployment target we pass to llvm. If not set the the linker uses Xcode or Xcode commandline tools default which varies by version.
Fixes #90342, #91082.
Drive-by fixes to make Rust behave more like clang:
* Default to 11.0 deployment target for ARM64 which is the earliest version that had support for it.
* Set the llvm target to `arm64-apple-macosx<deployment target>` instead of `aarch64-apple-macosx<deployment target>`.
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Various fixes for const_trait_impl
A few problems I found while making `Iterator` easier to const-implement.
1. More generous `~const Drop` check.
We check for nested fields with caller bounds.
For example, an ADT type with fields of types `A`, `B`, `C`, check if all of them are either:
- Bounded (`A: ~const Drop`, `B: Copy`)
- Known to be able to destruct at compile time (`C = i32`, `struct C(i32)`, `C = some_fn`)
2. Don't treat trait functions marked with `#[default_method_body_is_const]` as stable const fns when checking `const_for` and `const_try` feature gates.
I think anyone can review this, so no r? this time.
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Tokenize emoji as if they were valid identifiers
In the lexer, consider emojis to be valid identifiers and reject
them later to avoid knock down parse errors.
Partially address #86102.
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11.0 (Big Sur) is the first version which supports ARM64 so we use
that as default.
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Account for incorrect `impl Foo<const N: ty> {}` syntax
Fix #84946
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Rollup of 7 pull requests
Successful merges:
- #89542 (Partially stabilize `duration_consts_2`)
- #90044 (Restrict aarch64 outline atomics to glibc for now.)
- #90420 (Create rustdoc_internals feature gate)
- #91075 (Reduce prominence of item-infos)
- #91151 (Fix test in std::process on android)
- #91179 (Fix more <a> color)
- #91199 (rustdoc: Add test for mixing doc comments and attrs)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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rustdoc: Add test for mixing doc comments and attrs
This is a step toward adding more test coverage to make it easier to
remove the distinction between collapsed and uncollapsed doc values.
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Fix more <a> color
Fixes #91175.
Another bug I saw is:
I fixed it as well.
r? ``@jsha``
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Fix test in std::process on android
closes #10380
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Reduce prominence of item-infos
Fixes #59853
- Remove border.
- Reduce size of emoji slightly.
- Remove details disclosure for unstable reason. This was inconsistent with our other details disclosures, and the detail revealed was usually better explained by clicking on the issue link.
Demo: https://rustdoc.crud.net/jsha/chill-item-info/std/mem/union.MaybeUninit.html#method.slice_assume_init_ref
Compare vs: https://doc.rust-lang.org/nightly/std/mem/union.MaybeUninit.html#method.slice_assume_init_ref
<img src="https://user-images.githubusercontent.com/220205/142717815-09828c9e-6ff4-445a-8ccc-31e028fd4985.png" width=700>
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Create rustdoc_internals feature gate
As suggested by ``@camelid`` [here](https://github.com/rust-lang/rust/pull/90398#issuecomment-955093851), since `doc_keyword` and `doc_primitive` aren't meant to be stabilized, we could put them behind a same feature flag.
This is pretty much what it would look like (needs to update the tests too).
The tracking issue is https://github.com/rust-lang/rust/issues/90418.
What do you think ``@rust-lang/rustdoc`` ?
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r=workingjubilee
Restrict aarch64 outline atomics to glibc for now.
The introduced dependency on `getauxval` causes linking problems with musl, making compiling any binaries for `aarch64-unknown-linux-musl` impossible without workarounds such as using lld or adding liblibc.rlib again to the linker invocation, see #89626.
This is a workaround until libc>0.2.108 is merged.
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Partially stabilize `duration_consts_2`
Methods that were only blocked on `const_panic` have been stabilized.
The remaining methods of `duration_consts_2` are all related to floats,
and as such have been placed behind the `duration_consts_float` feature
gate.
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This is a step toward adding more test coverage to make it easier to
remove the distinction between collapsed and uncollapsed doc values.
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Fix clicking on anchors inside summary tags
Fixes #91184
r? `@camelid`
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Use the available Generics span field to avoid issues with `T: Fn()` bounds.
This is necessary to land #85346.
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Fix #84946
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Optimize live point computation
This refactors the live-point computation to lower per-MIR-instruction costs by operating on a largely per-block level. This doesn't fundamentally change the number of operations necessary, but it greatly improves the practical performance by aggregating bit manipulation into ranges rather than single-bit; this scales much better with larger blocks.
On the benchmark provided in #90445, with 100,000 array elements, walltime for a check build is improved from 143 seconds to 15.
I consider the tiny losses here acceptable given the many small wins on real world benchmarks and large wins on stress tests. The new code scales much better, but on some subset of inputs the slightly higher constant overheads decrease performance somewhat. Overall though, this is expected to be a big win for pathological cases (as illustrated by the test case motivating this work) and largely not material for non-pathological cases. I consider the new code somewhat easier to follow, too.
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Remove eval_always for inherent_impls.
Split off https://github.com/rust-lang/rust/pull/86056
r? `@ghost`
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Fix toggle-click-deadspace rustdoc-gui test
In #91103 I introduced a rustdoc-gui test for clicks on toggles. I introduced some documentation on a method in lib2/struct.Foo.html so there would be something to toggle, but accidentally left the test checking test_docs/struct.Foo.html. That caused the test to reliably fail.
I'm not sure how that test got past GitHub Actions and bors, but it's manifesting in test failures at https://github.com/rust-lang/rust/pull/91062#issuecomment-977589705 and https://github.com/rust-lang/rust/pull/91170#issuecomment-977636159.
This fixes by pointing at the right file.
r? `@GuillaumeGomez`
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fix(doctest): detect extern crate items in statement doctests
This partially reverts #91026, because rustdoc needs to detect the extern statements, even when they appear inside implicit `main()`. It does not entirely revert it, so the old bug is still fixed, by duplicating some of the logic from `parse_mod` instead of trying to use it directly.
Fixes #91134
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By default, AST visitors visit expressions that appear in key-value attributes.
Those expressions should not be lowered to HIR, as they do not correspond to actually compiled code.
Since an attribute cannot produce meaningful HIR, just skip them altogether.
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Rollup of 6 pull requests
Successful merges:
- #90856 (Suggestion to wrap inner types using 'allocator_api' in tuple)
- #91103 (Inhibit clicks on summary's children)
- #91137 (Give people a single link they can click in the contributing guide)
- #91140 (Split inline const to two feature gates and mark expression position inline const complete)
- #91148 (Use `derive_default_enum` in the compiler)
- #91153 (kernel_copy: avoid panic on unexpected OS error)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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