Add `<meta charset="utf-8">` to `-Zdump-mir-spanview` output
Without an explicit `<meta charset>` declaration, some browsers (e.g. Safari) won't detect the page encoding as UTF-8, causing unicode characters in the dump output to display incorrectly.
Replace fvdl with ffx, allow test without install
Along with replacing fvdl uses with the equivalent ffx commands, this also switches from using the install path for libstd-*.so and libtest-*.so to using the build directory (now passed on the command line). The user no longer needs to run x.py install before running tests now, and the correct libstd and libtest are detected on run instead of startup so the test runner can handle recompilations after starting the testing environment.
r? ``@tmandry``
[rustdoc] Fix invalid handling of "going back in history" when "go to only search result" setting is enabled
You can test the fix [here](https://rustdoc.crud.net/imperio/back-in-history-fix/lib2/index.html). Enable "Directly go to item in search if there is only one result", then search for `HasALongTraitWithParams` and finally go back to previous page. It should be back on the `index.html` page.
The reason for this bug is that the JS state is cached as is, so when we go back to the page, it resumes where it was left, somewhat (very weird), meaning the search is run again etc. The best way to handle this is to force the JS re-execution in this case so that it doesn't try to resume from where it left and then lead us back to the current page.
r? ``@notriddle``
Correct types in method descriptions of `NonZero*` types
- `$Int`: e.g. i32, usize
- `$Ty`: e.g. NonZeroI32, NonZeroUsize
|method|current description|after my changes|
|-|-|-|
|`saturating_add`|...Return `$Int`::MAX on overflow.|...Return `$Ty`::MAX on overflow.|
|`checked_abs`|...returns None if self == `$Int`::MIN.|...returns None if self == `$Ty`::MIN.|
|`checked_neg`|...returning None if self == i32::MIN.|...returning None if self == `$Ty`::MIN.|
|`saturating_neg`|...returning MAX if self == i32::MIN...|...returning `$Ty`::MAX if self == `$Ty`::MIN...|
|`saturating_mul`|...Return `$Int`::MAX...|...Return `$Ty`::MAX...|
|`saturating_pow`|...Return `$Int`::MIN or `$Int`::MAX...|...Return `$Ty`::MIN or `$Ty`::MAX...|
---
For example:
```rust
pub const fn saturating_neg(self) -> NonZeroI128
```
- current
- Saturating negation. Computes `-self`, returning `MAX` if `self == i32::MIN` instead of overflowing.
- after my changes
- Saturating negation. Computes `-self`, returning `NonZeroI128::MAX` if `self == NonZeroI128::MIN` instead of overflowing.
Fix documentation build on FreeBSD
After the socket ancillary data implementation was introduced, the documentation build was broken on FreeBSD hosts, add the same workaround as for the existing implementations.
Fixes the doc build after #91793
Extend io::copy buffer reuse to BufReader too
previously it was only able to use BufWriter. This was due to a limitation in the BufReader generics that prevented specialization. This change works around the issue by using `BufReader where Self: Read` instead of `BufReader<I> where I: Read`. This limits our options, e.g. we can't access the inner reader, but it happens to work out if we rely on some implementation details.
Copying 1MiB from `/dev/zero` to `/dev/null` through a 256KiB BufReader yields following improvements
```
OLD:
io::copy::tests::bench_copy_buf_reader 51.44µs/iter +/- 703.00ns
NEW:
io::copy::tests::bench_copy_buf_reader 18.55µs/iter +/- 237.00ns
```
Previously this would read 256KiB into the reader but then copy 8KiB chunks to the writer through an additional intermediate buffer inside `io::copy`. Since those devices don't do much work most of the speedup should come from fewer syscalls and avoided memcopies.
The b3sum crate [notes that the default buffer size in io::copy is too small](4108923f52/b3sum/src/main.rs (L235-L239)). With this optimization they could achieve the desired performance by wrapping the reader in a `BufReader` instead of handrolling it.
Currently the optimization doesn't apply to things like `StdinLock`, but this can be addressed with an additional `AsMutBufReader` specialization trait.
previously it was only able to use BufWriter. This was due to a limitation in the
BufReader generics that prevented specialization. This change works around the issue
by using `where Self: Read` instead of `where I: Read`. This limits our options, e.g.
we can't access BufRead methods, but it happens to work out if we rely on some
implementation details.
Adapt versions.html file to cleaned up gh-pages
Companion PR to #10875
changelog: Remove legacy v0.0.* versions from Clippy repository and documentation.
Must be merged together with #10875 (best with a closed tree)
r? `@Alexendoo` (because you were randomly selected on the other PR :P)
Simplify `ImplSource` candidates a bit
Reduce the number of impl source candidates, which will hopefully make our life easier when trying to adapt things like `SelectionContext::select` and `codegen_select_candidate` for the new solver.
r? `@lcnr` but feel free to reassign
Add `AliasKind::Weak` for type aliases.
`type Foo<T: Debug> = Bar<T>;` does not check `T: Debug` at use sites of `Foo<NotDebug>`, because in contrast to a
```rust
trait Identity {
type Identity;
}
impl<T: Debug> Identity for T {
type Identity = T;
}
<NotDebug as Identity>::Identity
```
type aliases do not exist in the type system, but are expanded to their aliased type immediately when going from HIR to the type layer.
Similarly:
* a private type alias for a public type is a completely fine thing, even though it makes it a bit hard to write out complex times sometimes
* rustdoc expands the type alias, even though often times users use them for documentation purposes
* diagnostics show the expanded type, which is confusing if the user wrote a type alias and the diagnostic talks about another type that they don't know about.
For type alias impl trait, these issues do not actually apply in most cases, but sometimes you have a type alias impl trait like `type Foo<T: Debug> = (impl Debug, Bar<T>);`, which only really checks it for `impl Debug`, but by accident prevents `Bar<T>` from only being instantiated after proving `T: Debug`. This PR makes sure that we always check these bounds explicitly and don't rely on an implementation accident.
To not break all the type aliases out there, we only use it when the type alias contains an opaque type. We can decide to do this for all type aliases over an edition.
Or we can later extend this to more types if we figure out the back-compat concerns with suddenly checking such bounds.
As a side effect, easily allows fixing https://github.com/rust-lang/rust/issues/108617, which I did.
fixes https://github.com/rust-lang/rust/issues/108617
There's no need for the `const_eval_select` dance here. And while I originally wrote the `.try_into().unwrap_unchecked()` implementation here, it's kinda a mess in MIR -- this new one is substantially simpler, as shown by the old one being above the inlining threshold but the new one being below it.
Along with replacing fvdl uses with the equivalent ffx commands, this
also switches from using the install path for libstd-*.so and
libtest-*.so to using the build directory (now passed on the command
line). The user no longer needs to run x.py install before running tests
now, and the correct libstd and libtest are detected on run instead of
startup so the test runner can handle recompilations after starting the
testing environment.
Make assumption functions in new solver take `Binder<'tcx, Clause<'tcx>>`
We just use an if-let to match on an optional clause at all the places where we transition from `Predicate` -> `Clause`, but I assume that when things like item-bounds and param-env start to only store `Clause`s then those can just be trivially dropped.
r? ``@lcnr``
`#[lang_item]` for `core::ptr::Unique`
Tree Borrows is about to introduce experimental special handling of `core::ptr::Unique` in Miri to give it a semantics.
As of now there does not seem to be a clean way (i.e. other than `&format!("{adt:?}") == "std::ptr::Unique"`) to check if an `AdtDef` represents a `Unique`.
r? `@RalfJung`
Draft: making a lang item
