Generate a documentation page for core::mem::transmute.
In `#[no_std]` environments, `std::mem::transmute` is unavailable. Searching for "core transmute" online only pulls up `core::intrinsics::transmute`, which is behind the (unstable) `core_intrinsics` feature flag. Users wishing to use transmute in `#[no_std]` environments typically should use `core::mem::transmute` instead, as it is stable. This documentation makes `core::mem::transmute` discoverable.
Re-enable history api on file:// protocol
Fixes#57135.
I tested locally on chrome (since it was the browser having issues with history management on `file://` protocol) and it worked fine so I guess we can re-enable it.
r? @QuietMisdreavus
Document the one TyKind that isn't documented
This is especially confusing since the name `Foreign` and the name `extern type` are so different. I deduced that they're the same by consulting git-blame.
Make an assert debug-only in `find_constraint_paths_between_regions`.
This reduces instruction counts for NLL builds of `wg-grammar` by over
20%.
r? @nikomatsakis
Do not ICE in codegen when using a extern_type static
The layout of a extern_type static is unsized, but may pass the
Well-Formed check in typeck (See #55257). As a result, we
cannot assume that a static is sized when generating the `Place`
for an r-value.
Fixes: #57876
r? @oli-obk
Improve error message and docs for non-UTF-8 bytes in stdio on Windows
This should make debugging problems like abonander/multipart#106 significantly more straightforward in the future.
cc #23344, @retep998 @alexcrichton
Not sure who do r? so I'll let rust-highfive pick one.
Allow #[repr(align(x))] on enums (#57996)
Tracking issue: #57996
Implements an extension of [RFC 1358](https://github.com/rust-lang/rfcs/blob/master/text/1358-repr-align.md) behind a feature flag (`repr_align_enum`). Originally introduced here for structs: #39999.
It seems like only HIR-level changes are required, since enums are already aware of their alignment (due to alignment of their limbs).
cc @bitshifter
This is especially confusing since the name `Foreign`
and the name `extern type` are so different. I deduced
that they're the same by consulting git-blame.
Add a forever unstable opt-out of const qualification checks
r? @eddyb
cc @RalfJung @Centril
basically a forever unstable way to screw with const things in horribly unsafe, unsound and incoherent ways.
Note that this does *not* affect miri except by maybe violating assumptions that miri makes. But there's no change in how miri evaluates things.
Overhaul `syntax::fold::Folder`.
This PR changes `syntax::fold::Folder` from a functional style
(where most methods take a `T` and produce a new `T`) to a more
imperative style (where most methods take and modify a `&mut T`), and
renames it `syntax::mut_visit::MutVisitor`.
This makes the code faster and more concise.
rustdoc: don't try to get a DefId for a Def that doesn't have one
Fixes https://github.com/rust-lang/rust/issues/58054
The compiler allows you to write a `use` statement for a built-in non-macro attribute, since `use proc_macro` can apply to both the `proc_macro` crate and the `#[proc_macro]` attribute. However, if you write a use statement for something that *doesn't* have this crossover, rustdoc will try to use it the same way as anything else... which resulted in an ICE because it tried to pull a DefId for something that didn't have one. This PR makes rustdoc skip those lookups when it encounters them, allowing it to properly process and render these imports.
