impl<T, F, A: Allocator> DrainFilter<'_, T, F, A>
where
F: FnMut(&mut T) -> bool,
{
pub fn keep_rest(self);
}
```
Both these methods cancel draining of elements that were not yet yielded from the iterators. While this needs more testing & documentation, I want at least start the discussion. This may be a potential way out of the "should `DrainFilter` exhaust itself on drop?" argument.
bors [Mon, 29 Aug 2022 22:49:04 +0000 (22:49 +0000)]
Auto merge of #101167 - matthiaskrgr:rollup-yt3jdmp, r=matthiaskrgr
Rollup of 7 pull requests
Successful merges:
- #100898 (Do not report too many expr field candidates)
- #101056 (Add the syntax of references to their documentation summary.)
- #101106 (Rustdoc-Json: Retain Stripped Modules when they are imported, not when they have items)
- #101131 (CTFE: exposing pointers and calling extern fn is just impossible)
- #101141 (Simplify `get_trait_ref` fn used for `virtual_function_elimination`)
- #101146 (Various changes to logging of borrowck-related code)
- #101156 (Remove `Sync` requirement from lint pass objects)
Matthias Krüger [Mon, 29 Aug 2022 19:13:00 +0000 (21:13 +0200)]
Rollup merge of #101156 - Jarcho:remove_sync_lint_pass, r=compiler-errors
Remove `Sync` requirement from lint pass objects
This is blocking the clippy sync (#101140). One of the lint passes contains a `Cell` in order to make lifetimes work. It could be worked around, but this is the easier change to make if there are no objections.
Rational for removing the requirement
* All lint pass methods take `&mut self` arguments.
* Many passes depend on running is visitor order.
* Lint passes are created on demand so they're only ever stored in a local.
* `Send` is enough to lint different passes in parallel.
`LintStore` remains `Sync` with this. The constructor functions it contains still maintain their `Sync` requirement.
Matthias Krüger [Mon, 29 Aug 2022 19:12:58 +0000 (21:12 +0200)]
Rollup merge of #101141 - compiler-errors:get-trait-ref-is-a-misleading-name, r=oli-obk
Simplify `get_trait_ref` fn used for `virtual_function_elimination`
1. The name `get_trait_ref` is misleading, so I renamed it to something more like `expect_...` because it ICEs if used incorrectly.
2. No need to manually go through the existential trait refs, we already have `.principal()` for that.
Matthias Krüger [Mon, 29 Aug 2022 19:12:57 +0000 (21:12 +0200)]
Rollup merge of #101131 - RalfJung:ctfe-no-needs-rfc, r=oli-obk
CTFE: exposing pointers and calling extern fn is just impossible
The remaining "needs RFC" errors are just needlessly confusing, I think -- time to get rid of that error variant. They are anyway only reachable with miri-unleashed (if at all).
Matthias Krüger [Mon, 29 Aug 2022 19:12:55 +0000 (21:12 +0200)]
Rollup merge of #101056 - kpreid:prim-doc, r=JohnTitor
Add the syntax of references to their documentation summary.
Without this change, in <https://doc.rust-lang.org/1.63.0/std/#primitives>, `reference` is the only entry in that list which does not contain the syntax by which the type is named in source code. With this change, it contains them, in roughly the same way as the `pointer` entry does.
Matthias Krüger [Mon, 29 Aug 2022 19:12:54 +0000 (21:12 +0200)]
Rollup merge of #100898 - compiler-errors:too-many-expr-fields, r=spastorino
Do not report too many expr field candidates
When considering "this expressions' field has a {field/method}" suggestions:
1. Don't report methods that are out of scope
2. Use `span_suggestions` instead of reporting each field candidate, which caps the number of suggestions to 4
4. Blacklist some common traits like `Clone` and `Deref`
bors [Mon, 29 Aug 2022 18:56:59 +0000 (18:56 +0000)]
Auto merge of #101152 - Dylan-DPC:rollup-v4iw8ux, r=Dylan-DPC
Rollup of 8 pull requests
Successful merges:
- #98304 (Add MaybeUninit memset test)
- #98801 (Add a `File::create_new` constructor)
- #99821 (Remove separate indexing of early-bound regions)
- #100239 (remove an ineffective check in const_prop)
- #100337 (Stabilize `std::io::read_to_string`)
- #100819 (Make use of `[wrapping_]byte_{add,sub}`)
- #100934 (Remove a panicking branch from `fmt::builders::PadAdapter`)
- #101000 (Separate CountIsStar from CountIsParam in rustc_parse_format.)
bors [Mon, 29 Aug 2022 16:04:11 +0000 (16:04 +0000)]
Auto merge of #101147 - weihanglo:update-cargo, r=Mark-Simulacrum
Update cargo
5 commits in 6da726708a4406f31f996d813790818dce837161..4ed54cecce3ce9ab6ff058781f4c8a500ee6b8b5
2022-08-23 21:39:56 +0000 to 2022-08-27 18:41:39 +0000
- doc: pause, for readability (rust-lang/cargo#11027)
- Bump git2 to 0.15 and libgit2-sys to 0.14 (rust-lang/cargo#11004)
- Fix typo (rust-lang/cargo#11025)
- Update cargo-toml-vs-cargo-lock.md (rust-lang/cargo#11021)
- Apply GitHub fast path even for partial hashes (rust-lang/cargo#10807)
Dylan DPC [Mon, 29 Aug 2022 11:19:45 +0000 (16:49 +0530)]
Rollup merge of #101000 - m-ou-se:count-is-star, r=nagisa
Separate CountIsStar from CountIsParam in rustc_parse_format.
`rustc_parse_format`'s parser would result in the exact same output for `{:.*}` and `{:.0$}`, making it hard for diagnostics to handle these cases properly.
This splits those cases by adding a new `CountIsStar` enum variant.
This fixes #100995
Prerequisite for https://github.com/rust-lang/rust/pull/100996
Dylan DPC [Mon, 29 Aug 2022 11:19:43 +0000 (16:49 +0530)]
Rollup merge of #100819 - WaffleLapkin:use_ptr_byte_methods, r=scottmcm
Make use of `[wrapping_]byte_{add,sub}`
These new methods trivially replace old `.cast().wrapping_offset().cast()` & similar code.
Note that [`arith_offset`](https://doc.rust-lang.org/std/intrinsics/fn.arith_offset.html) and `wrapping_offset` are the same thing.
Dylan DPC [Mon, 29 Aug 2022 11:19:40 +0000 (16:49 +0530)]
Rollup merge of #100239 - RalfJung:const-prop-uninit, r=oli-obk
remove an ineffective check in const_prop
Based on https://github.com/rust-lang/rust/pull/100043, only the last two commits are new.
ConstProp has a special check when reading from a local that prevents reading uninit locals. However, if that local flows into `force_allocation`, then no check fires and evaluation proceeds. So this check is not really effective at preventing accesses to uninit locals.
With https://github.com/rust-lang/rust/pull/100043, `read_immediate` and friends always fail when reading uninit locals, so I don't see why ConstProp would need a separate check. Thus I propose we remove it. This is needed to be able to do https://github.com/rust-lang/rust/pull/100085.
Dylan DPC [Mon, 29 Aug 2022 11:19:39 +0000 (16:49 +0530)]
Rollup merge of #99821 - cjgillot:ast-lifetimes-2, r=compiler-errors
Remove separate indexing of early-bound regions
~Based on https://github.com/rust-lang/rust/pull/99728.~
This PR copies some modifications from https://github.com/rust-lang/rust/pull/97839 around object lifetime defaults.
These modifications allow to stop counting generic parameters during lifetime resolution, and rely on the indexing given by `rustc_typeck::collect`.
Dylan DPC [Mon, 29 Aug 2022 11:19:38 +0000 (16:49 +0530)]
Rollup merge of #98801 - joshtriplett:file-create-new, r=thomcc
Add a `File::create_new` constructor
We have `File::create` for creating a file or opening an existing file,
but the secure way to guarantee creating a new file requires a longhand
invocation via `OpenOptions`.
Add `File::create_new` to handle this case, to make it easier for people
to do secure file creation.
bors [Mon, 29 Aug 2022 07:54:06 +0000 (07:54 +0000)]
Auto merge of #100786 - sunshowers:macos-posix-chdir, r=sunshowers
Use posix_spawn for absolute paths on macOS
Currently, on macOS, Rust never uses the fast posix_spawn path if a
directory change is requested, due to a bug in Apple's libc. However, the
bug is only triggered if the program is a relative path.
This PR makes it so that the fast path continues to work if the program
is an absolute path or a lone filename.
This was an alternative proposed in https://github.com/rust-lang/rust/pull/80537#issue-776674009, and it makes a measurable performance difference in some of my code that spawns thousands of processes.
Weihang Lo [Mon, 29 Aug 2022 06:15:36 +0000 (07:15 +0100)]
Update cargo
5 commits in 6da726708a4406f31f996d813790818dce837161..4ed54cecce3ce9ab6ff058781f4c8a500ee6b8b5
2022-08-23 21:39:56 +0000 to 2022-08-27 18:41:39 +0000
- doc: pause, for readability (rust-lang/cargo#11027)
- Bump git2 to 0.15 and libgit2-sys to 0.14 (rust-lang/cargo#11004)
- Fix typo (rust-lang/cargo#11025)
- Update cargo-toml-vs-cargo-lock.md (rust-lang/cargo#11021)
- Apply GitHub fast path even for partial hashes (rust-lang/cargo#10807)
bors [Mon, 29 Aug 2022 05:12:53 +0000 (05:12 +0000)]
Auto merge of #101143 - matthiaskrgr:rollup-g8y5k0g, r=matthiaskrgr
Rollup of 9 pull requests
Successful merges:
- #94890 (Support parsing IP addresses from a byte string)
- #96334 (socket `set_mark` addition.)
- #99027 (Replace `Body::basic_blocks()` with field access)
- #100437 (Improve const mismatch `FulfillmentError`)
- #100843 (Migrate part of rustc_infer to session diagnostic)
- #100897 (extra sanity check against consts pointing to mutable memory)
- #100959 (translations: rename warn_ to warning)
- #101111 (Use the declaration's SourceInfo for FnEntry retags, not the outermost)
- #101116 ([rustdoc] Remove Attrs type alias)
Matthias Krüger [Mon, 29 Aug 2022 04:34:49 +0000 (06:34 +0200)]
Rollup merge of #101116 - GuillaumeGomez:rm-attrs-ty-alias, r=notriddle
[rustdoc] Remove Attrs type alias
When working on https://github.com/rust-lang/rust/pull/101006, I was quite confused because of this type alias as I'm used to having rustdoc types into `clean/types.rs`. Anyway, considering how few uses of it we have, I simply removed it.
Matthias Krüger [Mon, 29 Aug 2022 04:34:48 +0000 (06:34 +0200)]
Rollup merge of #101111 - saethlin:better-fnentry-spans, r=RalfJung
Use the declaration's SourceInfo for FnEntry retags, not the outermost
This addresses a long-standing `// FIXME` in the pass that adds retags.
The changes to Miri's UI tests will look like this:
```
--> $DIR/aliasing_mut1.rs:LL:CC
|
LL | pub fn safe(_x: &mut i32, _y: &mut i32) {}
< | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not granting access to tag <TAG> because incompatible item [Unique for <TAG>] is protected by call ID
> | ^^ not granting access to tag <TAG> because incompatible item [Unique for <TAG>] is protected by call ID
|
```
Matthias Krüger [Mon, 29 Aug 2022 04:34:47 +0000 (06:34 +0200)]
Rollup merge of #100959 - LuisCardosoOliveira:translation-rename-attr-warning, r=davidtwco
translations: rename warn_ to warning
## Description
This MR renames the the macro `warn_` to `warning`.
To give a little bit of context, as [explained](https://rust-lang.zulipchat.com/#narrow/stream/336883-i18n/topic/.23100717.20diag.20translation/near/295074146) by ```````@davidtwco``````` in the Zulip channel, `warn_` was named like that because the keyword `warn` is a built-in attribute and at the time this macro was created the word `warning` was also
taken.
However, it is no longer the case and we can rename `warn_` to `warning`.
Matthias Krüger [Mon, 29 Aug 2022 04:34:46 +0000 (06:34 +0200)]
Rollup merge of #100897 - RalfJung:const-not-to-mutable, r=lcnr
extra sanity check against consts pointing to mutable memory
This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
Matthias Krüger [Mon, 29 Aug 2022 04:34:43 +0000 (06:34 +0200)]
Rollup merge of #99027 - tmiasko:basic-blocks, r=oli-obk
Replace `Body::basic_blocks()` with field access
Since the refactoring in #98930, it is possible to borrow the basic blocks
independently from other parts of MIR by accessing the `basic_blocks` field
directly.
Replace unnecessary `Body::basic_blocks()` method with a direct field access,
which has an additional benefit of borrowing the basic blocks only.
Matthias Krüger [Mon, 29 Aug 2022 04:34:41 +0000 (06:34 +0200)]
Rollup merge of #94890 - marmeladema:ip-addr-try-from-bytes, r=joshtriplett
Support parsing IP addresses from a byte string
Fixes #94821
The goal is to be able to parse addresses from a byte string without requiring to do any utf8 validation. Since internally the parser already works on byte strings, this should be possible and I personally already needed this in the past too.
~~I used the proposed approach from the issue by implementing `TryFrom<&'a [u8]>` for all 6 address types (3 ip address types and 3 socket address types). I believe implementing stable traits for stable types is insta-stable so this will probably need an FCP?~~
Switched to an unstable inherent method approach called `parse_ascii` as requested.
Rain [Sat, 20 Aug 2022 01:24:21 +0000 (18:24 -0700)]
Use posix_spawn for absolute paths on macOS
Currently, on macOS, Rust never uses the fast posix_spawn path if a
directory change is requested due to a bug in Apple's libc. However, the
bug is only triggered if the program is a relative path.
This PR makes it so that the fast path continues to work if the program
is an absolute path or a lone filename.
This was an alternative proposed in
https://github.com/rust-lang/rust/pull/80537#issue-776674009, and it
makes a measurable performance difference in some of my code that spawns
thousands of processes.
bors [Sun, 28 Aug 2022 22:31:19 +0000 (22:31 +0000)]
Auto merge of #100578 - Urgau:float-next-up-down, r=scottmcm
Add next_up and next_down for f32/f64 - take 2
This is a revival of https://github.com/rust-lang/rust/pull/88728 which staled due to inactivity of the original author. I've address the last review comment.
---
This is a pull request implementing the features described at https://github.com/rust-lang/rfcs/pull/3173.
`@rustbot` label +T-libs-api -T-libs
r? `@scottmcm`
cc `@orlp`
bors [Sun, 28 Aug 2022 15:12:31 +0000 (15:12 +0000)]
Auto merge of #100201 - RalfJung:thread-local-key, r=thomcc
std: use realstd fast key when building tests
Under `cfg(test)`, the `std` crate is not the actual standard library, just any old crate we are testing. It imports the real standard library as `realstd`, and then does some careful `cfg` magic so that the crate built for testing uses the `realstd` global state rather than having its own copy of that.
However, this was not done for all global state hidden in std: the 'fast' version of thread-local keys, at least on some platforms, also involves some global state. Specifically its macOS version has this [`static REGISTERED`](https://github.com/rust-lang/rust/blob/bc63d5a26a65752fb105957d3235cc9c8cb0767f/library/std/src/sys/unix/thread_local_dtor.rs#L62) that would get duplicated. So this PR imports the 'fast' key type from `realstd` rather than using the local copy, to ensure its internal state (and that of the functions it calls) does not get duplicated.
I also noticed that the `__OsLocalKeyInner` is unused under `cfg(target_thread_local)`, so I removed it for that configuration. There was a comment saying macOS picks between `__OsLocalKeyInner` and `__FastLocalKeyInner` at runtime, but I think that comment is outdated -- I found no trace of such a runtime switching mechanism, and the library still check-builds on apple targets with this PR. (I don't have a Mac so I cannot actually run it.)
Matthias Krüger [Sun, 28 Aug 2022 07:35:17 +0000 (09:35 +0200)]
Rollup merge of #100955 - nrc:chain, r=joshtriplett
Some papercuts on error::Error
Renames the chain method, since I chain could mean anything and doesn't refer to a chain of sources (cc #58520) (and adds a comment explaining why sources is not a provided method on Error). Renames arguments to the request method from `req` to `demand` since the type is `Demand` rather than Request or Requisition.
Matthias Krüger [Sun, 28 Aug 2022 07:35:15 +0000 (09:35 +0200)]
Rollup merge of #100520 - jakubdabek:patch-1, r=thomcc
Add mention of `BufReader` in `Read::bytes` docs
There is a general paragraph about `BufRead` in the `Read` trait's docs, however using `bytes` without `BufRead` *always* has a large impact, due to reads of size 1.
Matthias Krüger [Sun, 28 Aug 2022 07:35:13 +0000 (09:35 +0200)]
Rollup merge of #99570 - XrXr:box-from-slice-docs, r=thomcc
Box::from(slice): Clarify that contents are copied
A colleague mentioned that they interpreted the old text
as saying that only the pointer and the length are copied.
Add a clause so it is more clear that the pointed to contents
are also copied.
Matthias Krüger [Sun, 28 Aug 2022 07:35:12 +0000 (09:35 +0200)]
Rollup merge of #98301 - ortem:pretty-printers-nonzero, r=wesleywiser
Add GDB/LLDB pretty-printers for NonZero types
Add GDB/LLDB pretty-printers for `NonZero` types.
These pretty-printers were originally implemented for IntelliJ Rust by ```@Kobzol``` in https://github.com/intellij-rust/intellij-rust/pull/5270.
Matthias Krüger [Sun, 28 Aug 2022 07:35:11 +0000 (09:35 +0200)]
Rollup merge of #97015 - nrc:read-buf-cursor, r=Mark-Simulacrum
std::io: migrate ReadBuf to BorrowBuf/BorrowCursor
This PR replaces `ReadBuf` (used by the `Read::read_buf` family of methods) with `BorrowBuf` and `BorrowCursor`.
The general idea is to split `ReadBuf` because its API is large and confusing. `BorrowBuf` represents a borrowed buffer which is mostly read-only and (other than for construction) deals only with filled vs unfilled segments. a `BorrowCursor` is a mostly write-only view of the unfilled part of a `BorrowBuf` which distinguishes between initialized and uninitialized segments. For `Read::read_buf`, the caller would create a `BorrowBuf`, then pass a `BorrowCursor` to `read_buf`.
In addition to the major API split, I've made the following smaller changes:
* Removed some methods entirely from the API (mostly the functionality can be replicated with two calls rather than a single one)
* Unified naming, e.g., by replacing initialized with init and assume_init with set_init
* Added an easy way to get the number of bytes written to a cursor (`written` method)
As well as simplifying the API (IMO), this approach has the following advantages:
* Since we pass the cursor by value, we remove the 'unsoundness footgun' where a malicious `read_buf` could swap out the `ReadBuf`.
* Since `read_buf` cannot write into the filled part of the buffer, we prevent the filled part shrinking or changing which could cause underflow for the caller or unexpected behaviour.
## Outline
```rust
pub struct BorrowBuf<'a>
impl Debug for BorrowBuf<'_>
impl<'a> From<&'a mut [u8]> for BorrowBuf<'a>
impl<'a> From<&'a mut [MaybeUninit<u8>]> for BorrowBuf<'a>
* ~~Migrate non-unix libs and tests~~
* ~~Naming~~
* ~~`BorrowBuf` or `BorrowedBuf` or `SliceBuf`? (We might want an owned equivalent for the async IO traits)~~
* ~~Should we rename the `readbuf` module? We might keep the name indicate it includes both the buf and cursor variations and someday the owned version too. Or we could change it. It is not publicly exposed, so it is not that important~~.
* ~~`read_buf` method: we read into the cursor now, so the `_buf` suffix is a bit weird.~~
* ~~Documentation~~
* Tests are incomplete (I adjusted existing tests, but did not add new ones).
cc https://github.com/rust-lang/rust/issues/78485, https://github.com/rust-lang/rust/issues/94741
supersedes: https://github.com/rust-lang/rust/pull/95770, https://github.com/rust-lang/rust/pull/93359
fixes #93305
bors [Sun, 28 Aug 2022 07:04:21 +0000 (07:04 +0000)]
Auto merge of #100863 - ehuss:sunset-rls, r=Mark-Simulacrum
Sunset RLS
This removes RLS per the plan outlined in https://blog.rust-lang.org/2022/07/01/RLS-deprecation.html. This replaces the `rls` executable with a small program which will display an alert telling the user that RLS is no longer available.
An overview of the changes here:
* Removes the rls submodule and replaces it with a small stub program.
* `rls` is removed from `./x.py install`. I do not think users running `install` will need the stub.
* `rls` is removed from `./x.py test`, it doesn't have any tests.
Other things of note:
* I kept `DIST_REQUIRE_ALL_TOOLS` even though it is no longer needed, with the thought that it could be useful in the feature. However, I could remove it if desired.
* I kept `extra_deps` in `tool_extended` (which allows tools to depend on other things), even though it is no longer needed. This can also be removed if desired.
* ~~This keeps RLS in the macOS `pkg` installer and the Windows `msi` installer. I kinda lean towards removing it from those, but I'm not sure?~~ RLS has been removed from pkg and msi.
* This does not remove the analysis component. It is not clear if we should keep this or not. RLS was the primary user, but I think there are a few users that have made tools around it.
* There will be several followup steps after this PR:
* Updating the toolstate repo to remove RLS.
* Updating documentation, such as rustc-dev-guide, to remove references to RLS.
bors [Sun, 28 Aug 2022 04:16:29 +0000 (04:16 +0000)]
Auto merge of #92845 - Amanieu:std_personality, r=Mark-Simulacrum
Move EH personality functions to std
These were previously in the panic_unwind crate with dummy stubs in the
panic_abort crate. However it turns out that this is insufficient: we
still need a proper personality function even with -C panic=abort to
handle the following cases:
1) `extern "C-unwind"` still needs to catch foreign exceptions with -C
panic=abort to turn them into aborts. This requires landing pads and a
personality function.
2) ARM EHABI uses the personality function when creating backtraces.
The dummy personality function in panic_abort was causing backtrace
generation to get stuck in a loop since the personality function is
responsible for advancing the unwind state to the next frame.
// mod intrinsics
fn mask<T>(ptr: *const T, mask: usize) -> *const T
```
This is equivalent to `ptr.map_addr(|a| a & mask)` but also uses a cool llvm intrinsic.
Proposed in https://github.com/rust-lang/rust/pull/95643#issuecomment-1121562352
bors [Sat, 27 Aug 2022 16:57:19 +0000 (16:57 +0000)]
Auto merge of #100591 - est31:stabilization_placeholder, r=Mark-Simulacrum
Require stabilizations to use a placeholder instead of writing out stabilization version
Implements the idea from [this](https://rust-lang.zulipchat.com/#narrow/stream/241545-t-release/topic/libs.20stabilization.20placeholder) zulip stream.
It's a common phenomenon that feature stabilizations don't make it into a particular release, but the version is still inaccurate. Often this is caught in the PR, but it can also require subsequent changes to adjust/correct the version. A list with examples of such PRs is given in #100577, but it's far from complete.
This PR requires stabilization PRs to use the placeholder `CURRENT_RUSTC_VERSION`, enforced via tidy tooling. The PR also adds a tool that replaces the placeholder with the version number. It can be invoked via `./x.py run src/tools/replace-version-placeholder` and is supposed to be ran upon beta branching as well as version bumping and any backports to the beta branch. I filed PRs to the dev guide and forge to document these changes in the release and stabilization workflows:
* The [dev guide](https://rustc-dev-guide.rust-lang.org/stabilization_guide.html#determining-the-stabilization-version) PR: https://github.com/rust-lang/rustc-dev-guide/pull/1443
* The [std dev guide](https://std-dev-guide.rust-lang.org/) PR: https://github.com/rust-lang/std-dev-guide/pull/43
* The [forge](https://github.com/rust-lang/rust-forge) PR: https://github.com/rust-lang/rust-forge/pull/643
est31 [Mon, 15 Aug 2022 14:57:46 +0000 (16:57 +0200)]
tidy: forbid since values for features that point to the current release or future ones
It's a common phenomenon that feature stabilizations don't make it into
a particular release, but the version is still inaccurate. Often this
leads to subsequent changes to adjust/correct the version.
Instead, require people to put a placeholder that gets replaced during
beta branching time with the current rust version. That way, there is
no chance that an error can be introduced.
Usage of the placeholder is required on the nightly channel, and forbidden
on the stable and beta channels.
This selector was added in c7312fbae4979c6d4fdfbd1f55a71cd47d82a480. The bug can be seen at <https://doc.rust-lang.org/1.27.0/alloc/slice/trait.SliceIndex.html#foreign-impls>.
This rule was added to help with a `<table>` that was used for displaying the function signature [src] lockup. That lockup was changed in 34bd2b845b3acd84c5a9bddae3ff8081c19ec5e9 to use flexbox instead, leaving this selector unused (at least, for its original purpose).
Yuki Okushi [Sat, 27 Aug 2022 04:14:22 +0000 (13:14 +0900)]
Rollup merge of #101044 - notriddle:notriddle/css-hidden-by, r=jsha
rustdoc: remove unused CSS for `hidden-by-*-hider`
This CSS seems to have become obsolete with the move to `<details>` tags,
and its corresponding JavaScript was removed in aee054d05d8b795d35c0b448a4b731b6507aa459
Yuki Okushi [Sat, 27 Aug 2022 04:14:20 +0000 (13:14 +0900)]
Rollup merge of #100953 - joshtriplett:write-docs, r=Mark-Simulacrum
Update documentation for `write!` and `writeln!`
https://github.com/rust-lang/rust/pull/37472 added this documentation, but it
needs updating:
- Remove some documentation duplicated between `writeln!` and `write!`
- Update `write!` docs: can now import traits as `_` to avoid conflicts
- Expand example to show how to implement qualified trait names
Yuki Okushi [Sat, 27 Aug 2022 04:14:18 +0000 (13:14 +0900)]
Rollup merge of #100811 - czzrr:master, r=Mark-Simulacrum
Fix wrong compiletest filters on Windows
As discussed in [#79334](https://github.com/rust-lang/rust/issues/79334), when calling e.g.
```
python x.py test src/test/ui/expr/compound-assignment/eval-order.rs
```
on Windows, compiletest passes the filter `expr/compound-assignment/eval-order.rs` to libtest, which instead should be `expr\compound-assignment\eval-order.rs`, as that is the file found when collecting tests. This is what I fixed.
I'm not sure how to organize a test for this. Any suggestions?
Yuki Okushi [Sat, 27 Aug 2022 04:14:16 +0000 (13:14 +0900)]
Rollup merge of #99784 - est31:deny_cfg_attr_crate_type_name, r=Mark-Simulacrum
Make forward compatibility lint deprecated_cfg_attr_crate_type_name deny by default
Turns the forward compatibility lint added by #83744 to deprecate `cfg_attr` usage with `#![crate_type]` and `#![crate_name]` attributes into deny by default. Copying the example from #83744:
```Rust
#![crate_type = "lib"] // remains working
#![cfg_attr(foo, crate_type = "bin")] // will stop working
```
Over 8 months have passed since #83744 was merged so I'd say this gives ample time for people to have been warned, so we can make the warning stronger. No usage was found via grep.app except for one, which was in an unmaintained code base that didn't seem to be used in the open source eco system. The crater run conducted in #83744 also didn't show up anything.
bors [Sat, 27 Aug 2022 03:19:12 +0000 (03:19 +0000)]
Auto merge of #100732 - dpaoliello:import_name_type, r=wesleywiser
Implementation of import_name_type
Fixes #96534 by implementing https://github.com/rust-lang/compiler-team/issues/525
Symbols that are exported or imported from a binary on 32bit x86 Windows can be named in four separate ways, corresponding to the [import name types](https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#import-name-type) from the PE-COFF spec. The exporting and importing binaries must use the same name encoding, otherwise mismatches can lead to link failures due to "missing symbols" or to 0xc0000139 (`STATUS_ENTRYPOINT_NOT_FOUND`) errors when the executable/library is loaded. For details, see the comments on the raw-dylib feature's https://github.com/rust-lang/rust/issues/58713. To generate the correct import libraries for these DLLs, therefore, rustc must know the import name type for each `extern` function, and there is currently no way for users to provide this information.
This change adds a new `MetaNameValueStr` key to the `#[link]` attribute called `import_name_type`, and which accepts one of three values: `decorated`, `noprefix`, and `undecorated`.
A single DLL is likely to export all its functions using the same import type name, hence `import_name_type` is a parameter of `#[link]` rather than being its own attribute that is applied per-function. It is possible to have a single DLL that exports different functions using different import name types, but users could express such cases by providing multiple export blocks for the same DLL, each with a different import name type.
Note: there is a fourth import name type defined in the PE-COFF spec, `IMPORT_ORDINAL`. This case is already handled by the `#[link_ordinal]` attribute. While it could be merged into `import_type_name`, that would not make sense as `#[link_ordinal]` provides per-function information (namely the ordinal itself).
Design decisions (these match the MCP linked above):
* For GNU, `decorated` matches the PE Spec and MSVC rather than the default behavior of `dlltool` (i.e., there will be a leading `_` for `stdcall`).
* If `import_name_type` is not present, we will keep our current behavior of matching the environment (MSVC vs GNU) default for decorating.
* Using `import_name_type` on architectures other than 32bit x86 will result in an error.
* Using `import_name_type` with link kinds other than `"raw-dylib"` will result in an error.