Suggest replacing `typeof(...)` with an actual type
This PR adds suggestion to replace `typeof(...)` with an actual type of `...`, for example in case of `typeof(1)` we suggest replacing it with `i32`.
If the expression
1. Is not const (`{ let a = 1; let _: typeof(a); }`)
2. Can't be found (`let _: typeof(this_variable_does_not_exist)`)
3. Or has non-suggestable type (closure, generator, error, etc)
we don't suggest anything.
The 1 one is sad, but it's not clear how to support non-consts expressions for `typeof`.
_This PR is inspired by [this tweet]._
[this tweet]: https://twitter.com/compiler_errors/status/1511945354752638976
Make def names and HIR names consistent.
The name in the `DefKey` is interned to create the `DefId`, so it does not
require any query to access. This can be leveraged to avoid a few useless
HIR accesses for names.
~In order to achieve that, generic parameters created from universal
impl-trait are given the pretty-printed ast as a name, instead of
`{{opaque}}`.~
~Drive-by: the `TyCtxt::opt_item_name` used a dummy span for non-local
definitions. We have access to `def_ident_span`, so we use it.~
expand: Remove `ParseSess::missing_fragment_specifiers`
It was used for deduplicating some errors for legacy code which are mostly deduplicated even without that, but at cost of global mutable state, which is not a good tradeoff.
cc https://github.com/rust-lang/rust/pull/95747#issuecomment-1091619403
r? ``@nnethercote``
Make non-power-of-two alignments a validity error in `Layout`
Inspired by the zulip conversation about how `Layout` should better enforce `size <= isize::MAX as usize`, this uses an N-variant enum on N-bit platforms to require at the validity level that the existing invariant of "must be a power of two" is upheld.
This was MIRI can catch it, and means there's a more-specific type for `Layout` to store than just `NonZeroUsize`.
It's left as `pub(crate)` here; a future PR could consider giving it a tracking issue for non-internal usage.
It was used for deduplicating some errors for legacy code which are mostly deduplicated even without that, but at cost of global mutable state, which is not a good tradeoff.
Hide cross-crate `#[doc(hidden)]` associated items in trait impls
Fixes#95717.
r? ```@GuillaumeGomez```
This is the bug I ran into in #95316.
```@rustbot``` label T-rustdoc A-cross-crate-reexports
[macro_metavar_expr] Add tests to ensure the feature requirement
These tests should have been added in the initial implementation they were unintentionally forgotten
cc #83527
r? ````@petrochenkov````
Strict provenance lints
See #95488.
This PR introduces two unstable (allow by default) lints to which lint on int2ptr and ptr2int casts, as the former is not possible in the strict provenance model and the latter can be written nicer using the `.addr()` API.
Based on an initial version of the lint by ```@Gankra``` in #95199.
assert_uninit_valid: ensure we detect at least arrays of uninhabited types
We can't easily extend this check to *all* arrays (Cc https://github.com/rust-lang/rust/pull/87041), but it turns out the existing check already catches arrays of uninhabited types. So let's make sure it stays that way by adding them to the test.
Inspired by the zulip conversation about how `Layout` should better enforce `size < isize::MAX as usize`, this uses an N-variant enum on N-bit platforms to require at the validity level that the existing invariant of "must be a power of two" is upheld.
This was MIRI can catch it, and means there's a more-specific type for `Layout` to store than just `NonZeroUsize`.
Enforce well formedness for type alias impl trait's hidden type
fixes#84657
This was not an issue with return-position-impl-trait because the generic bounds of the function are the same as those of the opaque type, and the hidden type must already be well formed within the function.
With type-alias-impl-trait the hidden type could be defined in a function that has *more* lifetime bounds than the type alias. This is fine, but the hidden type must still be well formed without those additional bounds.
Relevant commit messages from squashed history in order:
Add initial version of ThinBox
update test to actually capture failure
swap to middle ptr impl based on matthieu-m's design
Fix stack overflow in debug impl
The previous version would take a `&ThinBox<T>` and deref it once, which
resulted in a no-op and the same type, which it would then print causing
an endless recursion. I've switched to calling `deref` by name to let
method resolution handle deref the correct number of times.
I've also updated the Drop impl for good measure since it seemed like it
could be falling prey to the same bug, and I'll be adding some tests to
verify that the drop is happening correctly.
add test to verify drop is behaving
add doc examples and remove unnecessary Pointee bounds
ThinBox: use NonNull
ThinBox: tests for size
Apply suggestions from code review
Co-authored-by: Alphyr <47725341+a1phyr@users.noreply.github.com>
use handle_alloc_error and fix drop signature
update niche and size tests
add cfg for allocating APIs
check null before calculating offset
add test for zst and trial usage
prevent optimizer induced ub in drop and cleanup metadata gathering
account for arbitrary size and alignment metadata
Thank you nika and thomcc!
Update library/alloc/src/boxed/thin.rs
Co-authored-by: Josh Triplett <josh@joshtriplett.org>
Update library/alloc/src/boxed/thin.rs
Co-authored-by: Josh Triplett <josh@joshtriplett.org>
* split `fuzzy_provenance_casts` into a ptr2int and a int2ptr lint
* feature gate both lints
* update documentation to be more realistic short term
* add tests for these lints
Add known-bug for #95034
Couldn't fix the issue, since I am no type theorist and inference variables in universes above U0 scare me. But I at least wanted to add a known-bug test for it.
cc #95034 (does not fix)
Regression test for #82866
Saw that this issue was open when i was cleaning my old branch for #92237.
I am also not opposed to not adding an extra test and just closing #82866.
Fixes#82866
Stop flagging unexpected inner attributes as outer ones in certain diagnostics
Fixes#94340.
In the issue to-be-fixed I write that the general message _an inner attribute is not permitted in this context_ should be more specific noting that the “context” is the `include` macro. This, however, cannot be achieved without touching a lot of things and passing a flag to the `parse_expr` and `parse_item` calls in `expand_include`. This seems rather hacky to me. That's why I left it as it. `Span::from_expansion` does not apply either AFAIK.
`@rustbot` label A-diagnostics T-compiler
Bump bootstrap compiler to 1.61.0 beta
This PR bumps the bootstrap compiler to the 1.61.0 beta. The first commit changes the stage0 compiler, the second commit applies the "mechanical" changes and the third and fourth commits apply changes explained in the relevant comments.
r? `@Mark-Simulacrum`
Check that all hidden types are the same and then deduplicate them.
fixes#95538
This used to trigger a sanity check. Now we accept that there may be multiple places where a hidden type is constrained and we merge all of these at the end.
Ideally we'd merge eagerly, but that is a larger refactoring that I don't want to put into a backport
New mir-opt deref_separator
This adds a new mir-opt that split certain derefs into this form:
`let x = (*a.b).c;` to => `tmp = a.b; let x = (*tmp).c;`
Huge thanks to ``@oli-obk`` for his patient mentoring.
enhance `ConstGoto` mir-opt by moving up `StorageDead` statements
From the `FIXME` in the implementation of `ConstGoto` miropt. We can move `StorageDead` statements up to the predecessor. This can expand the scope of application of this opt.
rustdoc: Fix item info display overflow
I came across this issue when reading local `Iterator` docs (reproduced in this screenshot):
The problem comes from the fact that `span` isn't `display: block` by default. Since `item-info` was already present on `<div>` in other places, I moved the last one to `div` as well.
r? `@notriddle`
Use revisions to track NLL test output (part 1)
The idea here is 2 fold: 1) When we eventually do make NLL default on, that PR should be systematic in "delete revisions and corresponding error annotations" 2) This allows us to look at test NLL outputs in chunks. (Though, I've opted here not to "mark" these tests. There are some tests with NLL revisions *now* that will be missed. I expect we do a second pass once we have all the tests with NLL revisions; these tests should be easy enough to eyeball.)
The actual review here should be "easy", but a bit tedious. I expect we should manually go through each test output and confirm it's okay.
The majority of these are either: 1) Only span change (the one I see most common is highlighting an entire function call, rather than just the function name in that call) 2) "E0308 mismatched types" -> "lifetime does not live long enough" 3) "E0495 cannot infer an appropriate lifetime for lifetime parameter" -> "lifetime does not live long enough" 4) "E0312 lifetime of reference outlives lifetime of borrowed content" -> "lifetime does not live long enough" 5) "E0759 `XXX` has an anonymous lifetime `'_` but it needs to satisfy a `'static` lifetime requirement" -> "lifetime does not live long enough" 6) "E0623 lifetime mismatch" -> "lifetime does not live long enough"
Other than the now lack of an error code, most of these look fine (with most giving more helpful suggestions now).
`rfc1623` output isn't great.
cc ``@marmeladema`` if you want to look through these
Let's r? ``@oli-obk`` since you've commented on the Zulip thread ;)
