Move gensym operations from `Symbol` to `Ident`
Gensyms are always at the `Ident` level, and long-term we probably want to record gensym-ness in hygiene data.
r? @petrochenkov
Set -funwind-tables and -fno-exceptions unconditionally for LLVM's libunwind
These are required otherwise libunwind will end up with undefined
references to __gxx_personality_v0 which is provided by C++ ABI
library and that's undesirable.
remove confusing remarks about mixed volatile and non-volatile accesses
These comments were originally added by @ecstatic-morse in 911d35f0bf and then later edited by me. The intention, I think, was to make sure people do both their reads and writes with these methods if the affected memory really is used for communication with external devices.
However, [people read this as saying that mixed volatile/non-volatile accesses are UB](https://github.com/rust-lang/rust/issues/58599#issuecomment-493791130), which -- to my knowledge -- they are not. So better remove this.
Cc @rkruppe @rust-lang/wg-unsafe-code-guidelines
rustc: Improve type size assertions
Now they
- Tell what the new size is, when it changes
- Do not require passing an identifier
```
::: src\libsyntax\parse\token.rs:223:1
|
223 | static_assert_size!(Token, 123);
| -------------------------------- in this macro invocation
|
= note: expected type `[(); 123]`
found type `[(); 16]`
```
Document BinaryHeap time complexity
I went into some detail on the time complexity of `push` because it is relevant for using BinaryHeap efficiently -- specifically that you should avoid pushing many elements in ascending order when possible.
r? @Amanieu
Closes#47976. Closes#59698.
stable hashing: Remove unused field and add documentation.
This PR removes the `bytes_hashed` field from `StableHasher` which in the past has been used for collecting some statistics but has gone unused for quite a while (months at least) now.
The PR also tries to document some requirements for `HashStable` implementations that haven't been written down explicitly anywhere.
Fix intra-doc link resolution failure on re-exporting libstd
Currently, re-exporting libstd items as below will [occur a lot of failures](https://gist.github.com/taiki-e/e33e0e8631ef47f65a74a3b69f456366).
```rust
pub use std::*;
```
Until the underlying issue (#56922) fixed, we can fix that so they don't propagate to downstream crates.
Related: https://github.com/rust-lang/rust/pull/56941 (That PR fixed failures that occur when re-exporting from libcore to libstd.)
r? @QuietMisdreavus
Fix search sidebar width when no crate select is present
Fixes#60480.
I also fixed the box-shadow that seemed to have been kind of removed?
r? @QuietMisdreavus
These are required otherwise libunwind will end up with undefined
references to __gxx_personality_v0 which is provided by C++ ABI
library and that's undesirable.
This commit is intended to go through and review/refactor the azure
pipelines configuration we have. The major changes are:
* The separate `{windows,macos,linux}.yml` files are now all merged into
one `run.yml`. This allows a shared "master flow" for all platforms
with divergence only where necessary.
* Some install steps have been separated as `install-*.yml` scripts,
where each script internally matches on the appropriate OS and then
delegates accordingly.
* Some various bits and pieces of cruft have been removed which were
artifacts of Travis's setup or similar.
stabilize core parts of MaybeUninit
and deprecate mem::uninitialized in the future (1.40.0). This is part of implementing https://github.com/rust-lang/rfcs/pull/1892.
Also expand the documentation a bit.
This type is currently primarily useful when dealing with partially initialized arrays. In libstd, it is used e.g. in `BTreeMap` (with some unstable APIs that however can all be replaced, less ergonomically, by stable ones). What we stabilize should also be enough for `SmallVec` (Cc @bluss).
Making this useful for structs requires https://github.com/rust-lang/rfcs/pull/2582 or a commitment that references to uninitialized data are not insta-UB.
