[librustdoc] Only split lang string on `,`, ` `, and `\t`
Split markdown lang strings into tokens on `,`.
The previous behavior was to split lang strings into tokens on any
character that wasn't a `_`, `_`, or alphanumeric.
This is a potentially breaking change, so please scrutinize! See discussion in #78344.
I noticed some test cases that made me wonder if there might have been some reason for the original behavior:
```
t("{.no_run .example}", false, true, Ignore::None, true, false, false, false, v(), None);
t("{.sh .should_panic}", true, false, Ignore::None, false, false, false, false, v(), None);
t("{.example .rust}", false, false, Ignore::None, true, false, false, false, v(), None);
t("{.test_harness .rust}", false, false, Ignore::None, true, true, false, false, v(), None);
```
It seemed pretty peculiar to specifically test lang strings in braces, with all the tokens prefixed by `.`.
I did some digging, and it looks like the test cases were added way back in [this commit from 2014](https://github.com/rust-lang/rust/commit/3fef7a74ca9a) by `@skade.`
It looks like they were added just to make sure that the splitting was permissive, and aren't testing that those strings in particular are accepted.
Closes https://github.com/rust-lang/rust/issues/78344.
library: Normalize safety-for-unsafe-block comments
Almost all safety comments are of the form `// SAFETY:`,
so normalize the rest and fix a few of them that should
have been a `/// # Safety` section instead.
Furthermore, make `tidy` only allow the uppercase form. While
currently `tidy` only checks `core`, it is a good idea to prevent
`core` from drifting to non-uppercase comments, so that later
we can start checking `alloc` etc. too.
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Update outdated comment in unix Command.
The big comment in the `Command` struct has been incorrect for some time (at least since #46789 which removed `envp`). Rather than try to remove the allocations, this PR just updates the comment to reflect reality. There is an explanation for the reasoning at https://github.com/rust-lang/rust/pull/31409#issuecomment-182122895, discussing the potential of being able to call `Command::exec` after `libc::fork`. That can still be done in the future, but I think for now it would be good to just correct the comment.
Make char and u8 methods const
char methods `len_utf8`, `len_utf16`, `to_ascii_lowercase`, `eq_ignore_ascii_case` can be made const.
`u8` methods `to_ascii_lowercase`, `to_ascii_uppercase` are required to be const as well.
`u8::eq_ignore_ascii_case` was additionally made const.
Rebase of https://github.com/rust-lang/rust/pull/79549 originally authored by ``@YenForYang.`` Changes from that PR:
- Squashed all commits from #79549.
- rebased to latest upstream master.
- Removed const attributes for `char::escape_unicode` and `char::escape_default`.
- Updated `since` attributes for `const` stabilization to 1.52.0.
cc ``@m-ou-se.``
Make ptr::write const
~~The code in this PR as of right now is not much more than an experiment.~~
~~This should, if I am not mistaken, in theory compile and pass the tests once the bootstraping compiler is updated. Thus the PR is blocked on that which should happen some time after the February the 9th. Also we might want to wait for #79989 to avoid regressing performance due to using `mem::forget` over `intrinsics::forget`~~.
Add an impl of Error on `Arc<impl Error>`.
`Display` already exists so this should be a non-controversial change (famous last words).
Would have to be insta-stable.
Convert core/num/mod.rs to intra-doc links
Helps with #75080.
This can't convert the associated constants `MAX` and `MIN` until #74489 is merged.
r? `@poliorcetics`
rust_2015 and rust_2018 are just re-exports of v1.
rust_2021 is a module that for now just re-exports everything from v1,
such that we can add more things later.
Expand FlattenCompat folds
The former `chain`+`chain`+`fold` implementation looked nice from a
functional-programming perspective, but it introduced unnecessary layers
of abstraction on every `flat_map`/`flatten` fold. It's straightforward
to just fold each part in turn, and this makes it look like a simplified
version of the existing `try_fold` implementation.
For the `iter::bench_flat_map*` benchmarks, I get a large improvement in
`bench_flat_map_chain_sum`, from 1,598,473 ns/iter to 499,889 ns/iter,
and the rest are unchanged.
Almost all safety comments are of the form `// SAFETY:`,
so normalize the rest and fix a few of them that should
have been a `/// # Safety` section instead.
Furthermore, make `tidy` only allow the uppercase form. While
currently `tidy` only checks `core`, it is a good idea to prevent
`core` from drifting to non-uppercase comments, so that later
we can start checking `alloc` etc. too.
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
`escape_unicode`, `escape_default`, `len_utf8`, `len_utf16`, to_ascii_lowercase`, `eq_ignore_ascii_case`
`u8` methods `to_ascii_lowercase`, `to_ascii_uppercase` also must be made const
u8 methods made const
Update methods.rs
Update mod.rs
Update methods.rs
Fix `since` in rustc_const_stable to next stable
Fix `since` in rustc_const_stable to next stable
Update methods.rs
Update mod.rs
Improve non_fmt_panic lint.
This change:
- fixes the span used by this lint in the case the panic argument is a single macro expansion (e.g. `panic!(a!())`);
- adds a suggestion for `panic!(format!(..))` to remove `format!()` instead of adding `"{}", ` or using `panic_any` like it does now; and
- fixes the incorrect suggestion to replace `panic![123]` by `panic_any(123]`.
Fixes#82109.
Fixes#82110.
Fixes#82111.
Example output:
```
warning: panic message is not a string literal
--> src/main.rs:8:12
|
8 | panic!(format!("error: {}", "oh no"));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(non_fmt_panic)]` on by default
= note: this is no longer accepted in Rust 2021
= note: the panic!() macro supports formatting, so there's no need for the format!() macro here
help: remove the `format!(..)` macro call
|
8 | panic!("error: {}", "oh no");
| -- --
```
r? `@estebank`
This adds API documentation support for `std::os::wasi` modeled after
how `std::os::unix` works, so that WASI can be documented [here] along
with the other platforms.
[here]: https://doc.rust-lang.org/stable/std/os/index.html
Two changes of particular interest:
- This changes the `AsRawFd` for `io::Stdin` for WASI to return
`libc::STDIN_FILENO` instead of `sys::stdio::Stdin.as_raw_fd()` (and
similar for `Stdout` and `Stderr`), which matches how the `unix`
version works. `STDIN_FILENO` etc. may not always be explicitly
reserved at the WASI level, but as long as we have Rust's `std` and
`libc`, I think it's reasonable to guarantee that we'll always use
`libc::STDIN_FILENO` for stdin.
- This duplicates the `osstr2str` utility function, rather than
trying to share it across all the configurations that need it.
Update the bootstrap compiler
This updates the bootstrap compiler, notably leaving out a change to enable semicolon in macro expressions lint, because stdarch still depends on the old behavior.
- Link from `core::hash` to `HashMap` and `HashSet`
- Link from HashMap and HashSet to the module-level documentation on
when to use the collection
- Link from several collections to Wikipedia articles on the general
concept
add diagnostic items for OsString/PathBuf/Owned as well as to_vec on slice
This is adding diagnostic items to be used by rust-lang/rust-clippy#6730, but my understanding is the clippy-side change does need to be done over there since I am adding a new clippy feature.
Add diagnostic items to the following types:
OsString (os_string_type)
PathBuf (path_buf_type)
Owned (to_owned_trait)
As well as the to_vec method on slice/[T]
Make WASI's `hard_link` behavior match other platforms.
Following #78026, `std::fs::hard_link` on most platforms does not follow
symlinks. Change the WASI implementation to also not follow symlinks.
r? ```@alexcrichton```
Avoid `cfg_if` in `std::os`
rust-analyzer cannot currently load the `cfg_if` crate, which means that rust-analyzer is unable to see `std::os::{unix, windows, linux}` here. This works around that by avoiding `cfg_if`; the `#[cfg]` expressions are simple enough to reasonably write by hand.
Fixes https://github.com/rust-analyzer/rust-analyzer/issues/6038
Slight perf improvement on char::to_ascii_lowercase
`char::to_ascii_lowercase()` was checking if it was ascii and then if it was in the right range. Instead propose to check once (I think removing a compare and a shift in the process: [godbolt](https://godbolt.org/z/e5Tora) ).
before:
```
test char::methods::bench_to_ascii_lowercase ... bench: 11,196 ns/iter (+/- 632)
test char::methods::bench_to_ascii_uppercase ... bench: 11,656 ns/iter (+/- 671)
```
after:
```
test char::methods::bench_to_ascii_lowercase ... bench: 9,612 ns/iter (+/- 979)
test char::methods::bench_to_ascii_uppercase ... bench: 8,241 ns/iter (+/- 701)
```
(calling u8::to_ascii_lowercase and letting that flip the 5th bit is also an option, but it's more instructions. I'm thinking for things around ascii and char we want to be as efficient as possible.)
Improve design of `assert_len`
It was discussed in the [tracking issue](https://github.com/rust-lang/rust/issues/76393#issuecomment-761765448) that `assert_len`'s name and usage are confusing. This PR improves them based on a suggestion by ``@scottmcm`` in that issue.
I also improved the documentation to make it clearer when you might want to use this method.
Old example:
```rust
let range = range.assert_len(slice.len());
```
New example:
```rust
let range = range.ensure_subset_of(..slice.len());
```
Fixes#81157
The use of `ExitStatus` as the Rust type name for a Unix *wait
status*, not an *exit status*, is very confusing, but sadly probably
too late to change.
This area is confusing enough in Unix already (and many programmers
are already confuxed). We can at least document it.
I chose *not* to mention the way shells like to exit with signal
numbers, thus turning signal numbers into exit statuses. This is only
relevant for Rust programs using `std::process` if they run shells.
Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
