Commit Graph

165962 Commits

Author SHA1 Message Date
Jane Lusby
09e7b0b951 fix since field version for termination stabilization 2022-03-29 17:10:49 -07:00
Nicholas Nethercote
6b0a16ab1a Pre-allocate an empty Lrc<NamedMatchVec>.
This avoids some allocations.
2022-03-30 10:54:57 +11:00
Nicholas Nethercote
524d21bd54 Overhaul how matches are recorded.
Currently, matches within a sequence are recorded in a new empty
`matches` vector. Then when the sequence finishes the matches are merged
into the `matches` vector of the parent.

This commit changes things so that a sequence mp inherits the matches
made so far. This means that additional matches from the sequence don't
need to be merged into the parent. `push_match` becomes more
complicated, and the current sequence depth needs to be tracked. But
it's a sizeable performance win because it avoids one or more
`push_match` calls on every iteration of a sequence.

The commit also removes `match_hi`, which is no longer necessary.
2022-03-30 10:54:37 +11:00
Nicholas Nethercote
a1b140cdb7 Improve comments and rename many things for consistency.
In particular:
- Replace use of "item" with "matcher position/"mp".
- Replace use of "repetition" with "sequence".
- Replace `ms` with `matcher`.
2022-03-30 10:50:17 +11:00
Nicholas Nethercote
ac3d8ce1c6 Clarify comments about doc comments in macros. 2022-03-30 10:42:47 +11:00
Nicholas Nethercote
2b60cc081b Simplify and rename count_names. 2022-03-30 10:42:34 +11:00
Joshua Nelson
064a55952e Fix x doc --stage 0 compiler
Eric figured out the fix to this almost 2 years ago, I just didn't read his comment carefully enough at the timme.
The issue was that fake rustc and fake rustdoc were inconsistent about when they passed `--sysroot` to the real compiler.
Change them to consistently only pass it when `--target` is present.
2022-03-29 16:08:10 -05:00
bors
9c06e1ba47 Auto merge of #95448 - Dylan-DPC:rollup-wpj5yto, r=Dylan-DPC
Rollup of 4 pull requests

Successful merges:

 - #93840 (Stabilize Termination and ExitCode)
 - #95256 (Ensure io::Error's bitpacked repr doesn't accidentally impl UnwindSafe)
 - #95386 (Suggest wrapping patterns in enum variants)
 - #95437 (diagnostics: regression test for derive bounds)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
2022-03-29 21:01:45 +00:00
Dylan DPC
24715028a0
Rollup merge of #95437 - notriddle:notriddle/issue-79076, r=compiler-errors
diagnostics: regression test for derive bounds

Closes #79076
2022-03-29 22:46:36 +02:00
Dylan DPC
a0d2862ca4
Rollup merge of #95386 - compiler-errors:try-wrapping, r=oli-obk
Suggest wrapping patterns in enum variants

Structured suggestion to wrap a pattern in a single-field enum or struct:

```diff
 struct A;

 enum B {
   A(A),
 }

 fn main(b: B) {
   match b {
-    A => {}
+    B::A(A) => {}
   }
 }
```

Half of #94942, the other half I'm not exactly sure how to fix.

Also includes two drive-by changes (that I am open to splitting out into another PR, but thought they could be rolled up into this one):
- 07776c111f: Makes sure not to suggest wrapping if it doesn't have tuple field constructor (i.e. has named fields)
- 8f2bbb18fd53e5008bb488302dbd354577698ede: Also suggest wrapping expressions in a tuple struct (not just enum variants)
2022-03-29 22:46:34 +02:00
Dylan DPC
3208ed7b21
Rollup merge of #95256 - thomcc:fix-unwind-safe, r=m-ou-se
Ensure io::Error's bitpacked repr doesn't accidentally impl UnwindSafe

Sadly, I'm not sure how to easily test that we don't impl a trait, though (or can libstd use `where io::Error: !UnwindSafe` or something).

Fixes #95203
2022-03-29 22:46:33 +02:00
Dylan DPC
bba2a64d0c
Rollup merge of #93840 - yaahc:termination-stabilization-celebration-station, r=joshtriplett
Stabilize Termination and ExitCode

From https://github.com/rust-lang/rust/issues/43301

This PR stabilizes the Termination trait and associated ExitCode type. It also adjusts the ExitCode feature flag to replace the placeholder flag with a more permanent name, as well as splitting off the `to_i32` method behind its own permanently unstable feature flag.

This PR stabilizes the termination trait with the following signature:

```rust
pub trait Termination {
    fn report(self) -> ExitCode;
}
```

The existing impls of `Termination` are effectively already stable due to the prior stabilization of `?` in main.

This PR also stabilizes the following APIs on exit code

```rust
#[derive(Clone, Copy, Debug)]
pub struct ExitCode(_);

impl ExitCode {
    pub const SUCCESS: ExitCode;
    pub const FAILURE: ExitCode;
}

impl From<u8> for ExitCode { /* ... */ }
```

---

All of the previous blockers have been resolved. The main ones that were resolved recently are:

* The trait's name: We decided against changing this since none of the alternatives seemed particularly compelling. Instead we decided to end the bikeshedding and stick with the current name. ([link to the discussion](https://rust-lang.zulipchat.com/#narrow/stream/219381-t-libs/topic/Termination.2FExit.20Status.20Stabilization/near/269793887))
* Issues around platform specific representations: We resolved this issue by changing the return type of `report` from `i32` to the opaque type `ExitCode`. That way we can change the underlying representation without affecting the API, letting us offer full support for platform specific exit code APIs in the future.
* Custom exit codes: We resolved this by adding `From<u8> for ExitCode`. We choose to only support u8 initially because it is the least common denominator between the sets of exit codes supported by our current platforms. In the future we anticipate adding platform specific extension traits to ExitCode for constructors from larger or negative numbers, as needed.
2022-03-29 22:46:31 +02:00
Joshua Nelson
ae1259769c Don't build the full compiler before running unit tests
This has been present since `builder.ensure` was first added in https://github.com/rust-lang/rust/pull/43059.
It's unclear to me why it was added then - I tested these changes locally
with `x test compiler/rustc_data_structures --stage 0` and they worked fine.

Fixes https://github.com/rust-lang/rust/issues/51748.
2022-03-29 14:56:44 -05:00
Joshua Nelson
f5fb293295 Clarify how src/tools/x searches for python 2022-03-29 13:50:17 -05:00
Thom Chiovoloni
3ac93abfb2
Indicate the correct error code in the compile_fail block.
Co-authored-by: Mara Bos <m-ou.se@m-ou.se>
2022-03-29 11:45:49 -07:00
Joshua Nelson
4fc23a14b8 Make impl Debug for rustdoc::clean::Item easier to read
Before:

```
Item { name: Some("Send"), attrs: Attributes { doc_strings: [DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:15:1: 15:60 (#0), parent_module: None, doc: " Types that can be transferred across thread boundaries.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:16:1: 16:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:17:1: 17:78 (#0), parent_module: None, doc: " This trait is automatically implemented when the compiler determines it's", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:18:1: 18:17 (#0), parent_module: None, doc: " appropriate.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:19:1: 19:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:20:1: 20:70 (#0), parent_module: None, doc: " An example of a non-`Send` type is the reference-counting pointer", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:21:1: 21:85 (#0), parent_module: None, doc: " [`rc::Rc`][`Rc`]. If two threads attempt to clone [`Rc`]s that point to the same", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:22:1: 22:81 (#0), parent_module: None, doc: " reference-counted value, they might try to update the reference count at the", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:23:1: 23:83 (#0), parent_module: None, doc: " same time, which is [undefined behavior][ub] because [`Rc`] doesn't use atomic", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:24:1: 24:84 (#0), parent_module: None, doc: " operations. Its cousin [`sync::Arc`][arc] does use atomic operations (incurring", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:25:1: 25:39 (#0), parent_module: None, doc: " some overhead) and thus is `Send`.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:26:1: 26:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:27:1: 27:74 (#0), parent_module: None, doc: " See [the Nomicon](../../nomicon/send-and-sync.html) for more details.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:28:1: 28:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:29:1: 29:40 (#0), parent_module: None, doc: " [`Rc`]: ../../std/rc/struct.Rc.html", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:30:1: 30:42 (#0), parent_module: None, doc: " [arc]: ../../std/sync/struct.Arc.html", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:31:1: 31:61 (#0), parent_module: None, doc: " [ub]: ../../reference/behavior-considered-undefined.html", kind: SugaredDoc, indent: 1 }], other_attrs: [Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:3: 32:9 (#0), segments: [PathSegment { ident: stable#0, id: NodeId(33577), args: None }], tokens: None }, args: Delimited(DelimSpan { open: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:9: 32:10 (#0), close: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:44: 32:45 (#0) }, Parenthesis, TokenStream([(Token(Token { kind: Ident("feature", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:10: 32:17 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:18: 32:19 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "rust1", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:20: 32:27 (#0) }), Joint), (Token(Token { kind: Comma, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:27: 32:28 (#0) }), Alone), (Token(Token { kind: Ident("since", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:29: 32:34 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:35: 32:36 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "1.0.0", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:37: 32:44 (#0) }), Alone)])), tokens: None }, None), id: AttrId(48), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:1: 32:46 (#0) }, Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:23: 33:44 (#0), segments: [PathSegment { ident: rustc_diagnostic_item#0, id: NodeId(33578), args: None }], tokens: None }, args: Eq(/rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:45: 33:46 (#0), Token { kind: Literal(Lit { kind: Str, symbol: "Send", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:47: 33:53 (#0) }), tokens: None }, None), id: AttrId(49), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:23: 33:53 (#0) }, Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:3: 34:25 (#0), segments: [PathSegment { ident: rustc_on_unimplemented#0, id: NodeId(33580), args: None }], tokens: None }, args: Delimited(DelimSpan { open: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:25: 34:26 (#0), close: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:37:1: 37:2 (#0) }, Parenthesis, TokenStream([(Token(Token { kind: Ident("message", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:5: 35:12 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:13: 35:14 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "`{Self}` cannot be sent between threads safely", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:15: 35:63 (#0) }), Joint), (Token(Token { kind: Comma, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:63: 35:64 (#0) }), Alone), (Token(Token { kind: Ident("label", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:5: 36:10 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:11: 36:12 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "`{Self}` cannot be sent between threads safely", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:13: 36:61 (#0) }), Alone)])), tokens: None }, None), id: AttrId(50), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:1: 37:3 (#0) }] }, visibility: Public, kind: TraitItem(Trait { unsafety: Unsafe, items: [], generics: Generics { params: [], where_predicates: [] }, bounds: [], is_auto: true }), def_id: DefId(DefId(2:3027 ~ core[7f4a]::marker::Send)), cfg: None }
```

After:

```
Item { name: Some("Send"), visibility: Public, def_id: DefId(DefId(2:3027 ~ core[7f4a]::marker::Send)), kind: Trait, docs: "Types that can be transferred across thread boundaries.\n\nThis trait is automatically implemented when the compiler determines it's\nappropriate.\n\nAn example of a non-`Send` type is the reference-counting pointer\n[`rc::Rc`][`Rc`]. If two threads attempt to clone [`Rc`]s that point to the same\nreference-counted value, they might try to update the reference count at the\nsame time, which is [undefined behavior][ub] because [`Rc`] doesn't use atomic\noperations. Its cousin [`sync::Arc`][arc] does use atomic operations (incurring\nsome overhead) and thus is `Send`.\n\nSee [the Nomicon](../../nomicon/send-and-sync.html) for more details.\n\n[`Rc`]: ../../std/rc/struct.Rc.html\n[arc]: ../../std/sync/struct.Arc.html\n[ub]: ../../reference/behavior-considered-undefined.html" }
```
2022-03-29 13:32:28 -05:00
Mara Bos
f225808f49 Add tracking issue for sync_unsafe_cell. 2022-03-29 19:54:00 +02:00
bors
5e1d19d307 Auto merge of #95433 - Dylan-DPC:rollup-xdfit9h, r=Dylan-DPC
Rollup of 4 pull requests

Successful merges:

 - #94566 (Show ignore message in console and json output)
 - #95415 (diagnostics: regression test for HashMap iter_mut suggestion)
 - #95422 (Refactor: Use `format-args-capture` and remove an unnecessary nested block)
 - #95424 (⬆️ rust-analyzer)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
2022-03-29 17:48:40 +00:00
Mara Bos
750ab0370e Add SyncUnsafeCell. 2022-03-29 19:48:39 +02:00
Michael Howell
0eea3346d2 diagnostics: regression test for derive bounds
Closes #79076
2022-03-29 10:19:19 -07:00
Camille GILLOT
21a554caf6 Remember mutability in DefKind::Static.
This allows to compute the `BodyOwnerKind` from `DefKind` only, and
removes a direct dependency of some MIR queries onto HIR.

As a side effect, it also simplifies metadata, since we don't need 4
flavours of `EntryKind::*Static` any more.
2022-03-29 18:50:52 +02:00
bors
05d22212e8 Auto merge of #94566 - yanganto:show-ignore-message, r=m-ou-se
Show ignore message in console and json output

- Provide ignore the message in console and JSON output
- Modify the ignore message style in the log file

related: #92714
2022-03-29 15:18:57 +00:00
Dylan DPC
7fdde186bc
Rollup merge of #95424 - lnicola:rust-analyzer-2022-03-29, r=lnicola
⬆️ rust-analyzer

r? `@ghost`
2022-03-29 17:11:55 +02:00
Dylan DPC
564c583162
Rollup merge of #95422 - TaKO8Ki:use-format-args-capture-and-remove-unnecessary-nesting-in-rustc-typeck, r=petrochenkov
Refactor: Use `format-args-capture` and remove an unnecessary nested block
2022-03-29 17:11:54 +02:00
Dylan DPC
eceb173de9
Rollup merge of #95415 - notriddle:notriddle/issue-82081, r=Dylan-DPC
diagnostics: regression test for HashMap iter_mut suggestion

Closes #82081
2022-03-29 17:11:52 +02:00
Dylan DPC
1830e8fdcd
Rollup merge of #94566 - yanganto:show-ignore-message, r=m-ou-se
Show ignore message in console and json output

- Provide ignore the message in console and JSON output
- Modify the ignore message style in the log file

related: #92714
2022-03-29 17:11:51 +02:00
Ben Kimock
6e6d0cbf83 Add debug assertions to some unsafe functions
These debug assertions are all implemented only at runtime using
`const_eval_select`, and in the error path they execute
`intrinsics::abort` instead of being a normal debug assertion to
minimize the impact of these assertions on code size, when enabled.

Of all these changes, the bounds checks for unchecked indexing are
expected to be most impactful (case in point, they found a problem in
rustc).
2022-03-29 11:05:24 -04:00
Mara Bos
b1c3494d88
Remove unnecessary .as_ref(). 2022-03-29 15:53:09 +02:00
bors
11909e3588 Auto merge of #95096 - GuillaumeGomez:rm-header-fn-field, r=camelid
Remove header field from clean::Function

Fixes https://github.com/rust-lang/rust/issues/89673.

This is another take on https://github.com/rust-lang/rust/issues/89673 (compared to https://github.com/rust-lang/rust/pull/91217) but very different on the approach: I moved the header call in one place but still require to have the `clean::Item` so I can use the `DefId` to get what is missing.

cc `@jyn514` (you reviewed the original so maybe you want to take a look?)
r? `@camelid`
2022-03-29 12:49:03 +00:00
Antonio Yang
3a0ae49135 Refactor after review
Co-authored-by: Mara Bos <m-ou.se@m-ou.se>
2022-03-29 20:34:13 +08:00
Chris Denton
017a092f45
Disable #[thread_local] support on i686-pc-windows-msvc 2022-03-29 12:37:20 +01:00
Guillaume Gomez
8071332d83 Merge ItemKind::TyMethodItem branch with ItemKind::FunctionItem and ItemKind::MethodItem in fn_header function 2022-03-29 12:09:42 +02:00
bors
e2301ca543 Auto merge of #95375 - MarcusCalhoun-Lopez:i686_apple_darwin, r=m-ou-se
Fix build on i686-apple-darwin systems

Replace `target_arch = "x86_64"` with `not(target_arch = "aarch64")` so that i686-apple-darwin systems dynamically choose implementation.
2022-03-29 10:08:03 +00:00
Guillaume Gomez
fd48ea02af Add test to ensure foreign functions from dependencies are correctly handled 2022-03-29 11:46:57 +02:00
Guillaume Gomez
2c4ce9d2dc Remove header field from clean::Function 2022-03-29 11:46:57 +02:00
bors
abf0ec8383 Auto merge of #95257 - compiler-errors:fn-borrow, r=lcnr
Add suggestion to borrow `Fn` and `FnMut` params/opaque/closures instead of move

I think that Closure/ParamTy/Opaque are all "opaque" enough that it's meaningful to suggest borrowing them instead of moving them at their usage sites when we see a move error. See the attached issue for example.

Is this suggestion too general? I could perhaps use the move site information to limit this to places like fn calls, but I don't know enough about mir borrowck to know if that's an easy change.

Fixes #90828
2022-03-29 07:27:14 +00:00
Laurențiu Nicola
acb9b7e842 ⬆️ rust-analyzer 2022-03-29 08:31:05 +03:00
Michael Goulet
ac95e80186 Suggest function borrow ignoring needs_note
`needs_note` is false if we've already suggested why the type is Copy...
but that has nothing to do with the diagnostic.
2022-03-28 22:27:07 -07:00
Michael Goulet
a9b02e13a6 drive-by: move Copy bound suggestion to its own function 2022-03-28 22:27:07 -07:00
Michael Goulet
0f3c2933e0 Add suggestion to borrow opaque Fn and FnMut instead of move 2022-03-28 22:27:06 -07:00
bors
14328e654a Auto merge of #95423 - ehuss:update-books, r=ehuss
Update books

## nomicon

3 commits in f6d6126fc96ecf4a7f7d22da330df9506293b0d0..11f1165e8a2f5840467e748c8108dc53c948ee9a
2022-02-26 02:21:21 +0900 to 2022-03-19 16:02:00 -0400
- Make the Vec impl be slightly more careful with ZSTs and alignment.
- implement `IntoIterator` for `Vec` (rust-lang/nomicon#337)
- Add an explanation shared to exclusive transmute (rust-lang/nomicon#344)

## reference

2 commits in 0a2fe6651fbccc6416c5110fdf5b93fb3cb29247..c97d14fa6fed0baa9255432b8a93cb70614f80e3
2022-03-15 09:32:25 -0700 to 2022-03-19 18:18:10 -0700
- Fixed inconsistency in the usage of semicolon at end of scopes (rust-lang/reference#1182)
- Document ADX `target_feature` (rust-lang/reference#1172)

## book

23 commits in 036e88a4f135365de85358febe5324976a56030a..ea90bbaf53ba64ef4e2da9ac2352b298aec6bec8
2022-03-04 21:53:33 -0500 to 2022-03-28 21:59:34 -0400
- Fix nostarch snapshot
- Snapshot of chapter 7 for nostarch
- Add a forward reference to chapter 14, another example of pub use
- Clarify pub use example. Fixes rust-lang/book#2716.
- Fancy quotes
- Fix incorrectly worded sentence. Fixes rust-lang/book#3086.
- Reword description of how a listing came to be
- Call out binary+library crate practices
- Define binary and library crates more explicitly
- Clarify when a path is a crate name and when it should be literal crate
- Make it clearer the outer `mod` doesn't move to the file
- Don't wrap this example in main when copying. Fixes rust-lang/book#2930.
- Try to make clearer that `mod` is not an `import`
- Mention mod.rs file naming scheme
- Explain why submodule subdirectories are needed more
- Rename a separate example of serve_order to deliver_order
- Show an example that `use` only applies in its own scope
- quick modules guide
- Tweak a snippet of ch18-03
- Propagating edits to chapter 10 back
- Responses to nostarch questions of chapter 10
- Update src/ch04-01-what-is-ownership.md
- Add Danish translation link. Connects to rust-lang/book#3079.

## rust-by-example

2 commits in d504324f1e7dc7edb918ac39baae69f1f1513b8e..ec954f35eedf592cd173b21c05a7f80a65b61d8a
2022-03-07 09:26:32 -0300 to 2022-03-22 11:09:06 -0300
- PathBuf details and example (rust-lang/rust-by-example#1519)
- Move allow dead code attribute and add comment (rust-lang/rust-by-example#1518)

## rustc-dev-guide

1 commits in 0e4b961a9c708647bca231430ce1b199993e0196..155126b1d2e2cb01ddb1d7ba9489b90d7cd173ad
2022-03-14 08:40:37 -0700 to 2022-03-22 14:34:21 +0100
- update section for type system constants (rust-lang/rustc-dev-guide#1329)

## embedded-book

1 commits in d5fc1bce3f8eb398f9c25f1b15e0257d7537cd41..a6de8b6e3ea5d4f0de8b7b9a7e5c1405dc2c2ddb
2022-01-24 07:13:31 +0000 to 2022-03-17 21:21:39 +0000
- Update OpenOCD install instruction for rust-embedded/book#313  (rust-embedded/book#314)
2022-03-29 05:15:58 +00:00
Eric Huss
565669fb5b Update books 2022-03-28 22:16:31 -07:00
Takayuki Maeda
f2506c911b use format-args-capture and remove an unnecessary nested block 2022-03-29 12:18:22 +09:00
Caleb Cartwright
e0c7b7d5d3 tests: ignore cargo fmt test for rust-lang/rust runs 2022-03-28 21:33:45 -05:00
Caleb Cartwright
4fecede7fd Revert "Use cargo-fmt in self_tests"
This reverts commit c63d42e804.
2022-03-28 21:33:45 -05:00
bors
ad5b6f6b72 Auto merge of #95417 - ehuss:doc-no_std-error, r=Dylan-DPC
bootstrap: better error message for no_std docs

Currently if one tries to build std documentation for a no_std target, you get a confusing error message:

`error: The argument '--package [<SPEC>...]' was provided more than once, but cannot be used multiple times`

This is because [`std_cargo`](600ec28483/src/bootstrap/compile.rs (L299-L305)) has a built-in `-p alloc` argument that conflicts with the `cargo rustdoc` command used in the Std doc step.

This just adds a better error message in this scenario. It may be possible to fix this correctly, but that would likely be a bit more of an invasive change that I don't have time for right now.
2022-03-29 01:09:22 +00:00
bors
c1230e137b Auto merge of #95249 - HeroicKatora:set-ptr-value, r=dtolnay
Refactor set_ptr_value as with_metadata_of

Replaces `set_ptr_value` (#75091) with methods of reversed argument order:

```rust
impl<T: ?Sized> *mut T {
    pub fn with_metadata_of<U: ?Sized>(self, val: *mut U) -> *mut U;
}

impl<T: ?Sized> *const T {
    pub fn with_metadata_of<U: ?Sized>(self, val: *const U) -> *const U;
}
```

By reversing the arguments we achieve several clarifications:

- The function closely resembles `cast` with an argument to
  initialize the metadata. This is easier to teach and answers a long
  outstanding question that had restricted cast to `Sized` pointee
  targets. See multiples reviews of
  <https://github.com/rust-lang/rust/pull/47631>
- The 'object identity', in the form of provenance, is now preserved
  from the receiver argument to the result. This helps explain the method as
  a builder-style, instead of some kind of setter that would modify
  something in-place. Ensuring that the result has the identity of the
  `self` argument is also beneficial for an intuition of effects.
- An outstanding concern, 'Correct argument type', is avoided by not
  committing to any specific argument type. This is consistent with cast
  which does not require its receiver to be a 'raw address'.

Hopefully the usage examples in `sync/rc.rs` serve as sufficient examples of the style to convince the reader of the readability improvements of this style, when compared to the previous order of arguments.

I want to take the opportunity to motivate inclusion of this method _separate_ from metadata API, separate from `feature(ptr_metadata)`. It does _not_ involve the `Pointee` trait in any form. This may be regarded as a very, very light form that does not commit to any details of the pointee trait, or its associated metadata. There are several use cases for which this is already sufficient and no further inspection of metadata is necessary.

- Storing the coercion of `*mut T` into `*mut dyn Trait` as a way to dynamically cast some an arbitrary instance of the same type to a dyn trait instance. In particular, one can have a field of type `Option<*mut dyn io::Seek>` to memorize if a particular writer is seekable. Then a method `fn(self: &T) -> Option<&dyn Seek>` can be provided, which does _not_ involve the static trait bound `T: Seek`. This makes it possible to create an API that is capable of utilizing seekable streams and non-seekable streams (instead of a possible less efficient manner such as more buffering) through the same entry-point.

- Enabling more generic forms of unsizing for no-`std` smart pointers. Using the stable APIs only few concrete cases are available. One can unsize arrays to `[T]` by `ptr::slice_from_raw_parts` but unsizing a custom smart pointer to, e.g., `dyn Iterator`, `dyn Future`, `dyn Debug`, can't easily be done generically. Exposing `with_metadata_of` would allow smart pointers to offer their own `unsafe` escape hatch with similar parameters where the caller provides the unsized metadata. This is particularly interesting for embedded where `dyn`-trait usage can drastically reduce code size.
2022-03-28 22:47:31 +00:00
Nicholas Nethercote
df6ead557d Add a useful assertion. 2022-03-29 08:00:26 +11:00
Marcus Calhoun-Lopez
8c18844324 Fix build on i686-apple-darwin systems
On 32-bit systems, fdopendir is called `_fdopendir$INODE64$UNIX2003`.
On 64-bit systems, fdopendir is called `_fdopendir$INODE64`.
2022-03-28 12:52:14 -07:00
Marcus Calhoun-Lopez
c2d5c64132 Fix build on i686-apple-darwin systems
Replace `target_arch = "x86_64"` with `not(target_arch = "aarch64")` so that i686-apple-darwin systems dynamically choose implementation.
2022-03-28 12:52:14 -07:00