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Author SHA1 Message Date
Ezra Shaw
b73cdf1b29
special case removing & suggestion 2023-01-18 13:14:56 +13:00
Ezra Shaw
ca1178f022
make CastError::NeedsDeref create a MachineApplicable suggestion + other misc fixes 2023-01-16 20:24:01 +13:00
bors
41edaac716 Auto merge of #106907 - matthiaskrgr:rustdoc_ref, r=GuillaumeGomez 
rustdoc: simplify some & ref erences
 2023-01-16 02:43:25 +00:00
bors
9a19e76044 Auto merge of #106914 - matthiaskrgr:rollup-yh0x4gq, r=matthiaskrgr 
Rollup of 5 pull requests

Successful merges:

 - #106888 (Add tidy check to ensure that rustdoc GUI tests start with a small description)
 - #106896 (suggest `is_empty` for collections when casting to `bool`)
 - #106900 (Fix regression in `unused_braces` with macros)
 - #106906 (remove redundant clones)
 - #106909 (Only suggest adding type param if path being resolved was a type)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
 2023-01-15 21:35:50 +00:00
Matthias Krüger
fc78b1e7f9
Rollup merge of #106909 - compiler-errors:only-types-can-be, r=estebank 
Only suggest adding type param if path being resolved was a type
 2023-01-15 21:17:36 +01:00
Matthias Krüger
8bd67dd12d
Rollup merge of #106906 - matthiaskrgr:clone, r=Nilstrieb 
remove redundant clones
 2023-01-15 21:17:35 +01:00
Matthias Krüger
5321ad574d
Rollup merge of #106900 - clubby789:unused-braces-regression, r=estebank 
Fix regression in `unused_braces` with macros

Fixes #106899
 2023-01-15 21:17:35 +01:00
Matthias Krüger
5610231454
Rollup merge of #106896 - Ezrashaw:str-cast-bool-emptyness, r=compiler-errors 
suggest `is_empty` for collections when casting to `bool`

Fixes #106883

Matches on slices, `String` and `str`. It would be nice to do this with something like `Deref<Target=str>` as well, but AFAIK it's not possible in this part of the compiler.
 2023-01-15 21:17:34 +01:00
Matthias Krüger
72180b348b
Rollup merge of #106888 - GuillaumeGomez:tidy-gui-test, r=notriddle 
Add tidy check to ensure that rustdoc GUI tests start with a small description

The first commit comes from https://github.com/rust-lang/rust/pull/106865 to prevent CI to fail.

This PR adds a tidy check to enforce having a small description at the top of the GUI test. Although the format is made to be as easy as possible to read, it's not always obvious what a test is actually checking. I think enforcing this will make it easier for us to come back on these tests if needed.

r? `@notriddle`
 2023-01-15 21:17:34 +01:00
bors
9e75dddf60 Auto merge of #106393 - the8472:use-ptr-sub, r=scottmcm 
Simplify manual ptr arithmetic in slice::Iter with ptr_sub

The old code was introduced in #61885, which predates the ptr_sub method and underlying intrinsic. The codegen test still passes.

r? `@scottmcm`
 2023-01-15 18:39:40 +00:00
The 8472
9db0134018 replace manual ptr arithmetic with ptr_sub 2023-01-15 17:38:05 +01:00
Michael Goulet
566202b975 Only suggest adding type param if path being resolved was a type 2023-01-15 16:33:08 +00:00
bors
ae4d89dfb5 Auto merge of #106742 - compiler-errors:new-solver-make-it-not-ice, r=lcnr 
Implement some FIXME methods in the new trait solver

Implement just enough of the solver's response logic to make it not ICE.

Also, fix a bug with `no_bound_vars` call failing due to canonical bound vars.

r? `@lcnr`
 2023-01-15 15:07:27 +00:00
Matthias Krüger
fdd6af14a1 rustdoc: simplify some & ref erences 2023-01-15 15:23:30 +01:00
Matthias Krüger
665d4ea98d remove redundant clones 2023-01-15 15:02:02 +01:00
bors
fc11ee02ee Auto merge of #106171 - compiler-errors:consolidate-extract_callable_info, r=estebank,lcnr 
Consolidate two almost duplicated fn info extraction routines

Moves `extract_callable_info` up to trait selection, because it was being (almost) duplicated fully there for similar diagnostic purposes. This also generalizes the diagnostics we can give slightly (see UI test).
 2023-01-15 12:10:36 +00:00
Guillaume Gomez
5376670323 Add small description to GUI test 2023-01-15 12:58:04 +01:00
Guillaume Gomez
98cfa68f16 Add tidy check to ensure that rustdoc GUI tests start with a small description 2023-01-15 12:58:04 +01:00
Ezra Shaw
92ced4a12e
suggest is_empty for collections when casting to bool 2023-01-15 22:17:54 +13:00
bors
bbb36fe545 Auto merge of #105851 - dtolnay:peekmutleak, r=Mark-Simulacrum 
Leak amplification for peek_mut() to ensure BinaryHeap's invariant is always met

In the libs-api team's discussion around #104210, some of the team had hesitations around exposing malformed BinaryHeaps of an element type whose Ord and Drop impls are trusted, and which does not contain interior mutability.

For example in the context of this kind of code:

```rust
use std::collections::BinaryHeap;
use std::ops::Range;
use std::slice;

fn main() {
    let slice = &mut ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
    let cut_points = BinaryHeap::from(vec![4, 2, 7]);
    println!("{:?}", chop(slice, cut_points));
}

// This is a souped up slice::split_at_mut to split in arbitrary many places.
//
// usize's Ord impl is trusted, so 1 single bounds check guarantees all those
// output slices are non-overlapping and in-bounds
fn chop<T>(slice: &mut [T], mut cut_points: BinaryHeap<usize>) -> Vec<&mut [T]> {
    let mut vec = Vec::with_capacity(cut_points.len() + 1);
    let max = match cut_points.pop() {
        Some(max) => max,
        None => {
            vec.push(slice);
            return vec;
        }
    };

    assert!(max <= slice.len());

    let len = slice.len();
    let ptr: *mut T = slice.as_mut_ptr();
    let get_unchecked_mut = unsafe {
        |range: Range<usize>| &mut *slice::from_raw_parts_mut(ptr.add(range.start), range.len())
    };

    vec.push(get_unchecked_mut(max..len));
    let mut end = max;
    while let Some(start) = cut_points.pop() {
        vec.push(get_unchecked_mut(start..end));
        end = start;
    }
    vec.push(get_unchecked_mut(0..end));
    vec
}
```

```console
[['7', '8', '9'], ['4', '5', '6'], ['2', '3'], ['0', '1']]
```

In the current BinaryHeap API, `peek_mut()` is the only thing that makes the above function unsound.

```rust
let slice = &mut ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
let mut cut_points = BinaryHeap::from(vec![4, 2, 7]);
{
    let mut max = cut_points.peek_mut().unwrap();
    *max = 0;
    std::mem::forget(max);
}
println!("{:?}", chop(slice, cut_points));
```

```console
[['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'], [], ['2', '3'], ['0', '1']]
```

Or worse:

```rust
let slice = &mut ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
let mut cut_points = BinaryHeap::from(vec![100, 100]);
{
    let mut max = cut_points.peek_mut().unwrap();
    *max = 0;
    std::mem::forget(max);
}
println!("{:?}", chop(slice, cut_points));
```

```console
[['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'], [], ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '\u{1}', '\0', '?', '翾', '?', '翾', '\0', '\0', '?', '翾', '?', '翾', '?', '啿', '?', '啿', '?', '啿', '?', '啿', '?', '啿', '?', '翾', '\0', '\0', '񤬐', '啿', '\u{5}', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\u{8}', '\0', '`@',` '\0', '\u{1}', '\0', '?', '翾', '?', '翾', '?', '翾', '
thread 'main' panicked at 'index out of bounds: the len is 33 but the index is 33', library/core/src/unicode/unicode_data.rs:319:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```

---

This PR makes `peek_mut()` use leak amplification (https://doc.rust-lang.org/1.66.0/nomicon/leaking.html#drain) to preserve the heap's invariant even in the situation that `PeekMut` gets leaked.

I'll also follow up in the tracking issue of unstable `drain_sorted()` (#59278) and `retain()` (#71503).
 2023-01-15 08:59:55 +00:00
clubby789
295f5483fe Fix regression in unused_braces with macros 2023-01-15 05:08:30 +00:00
bors
754f6d4a8c Auto merge of #106892 - matthiaskrgr:rollup-ohneu8o, r=matthiaskrgr 
Rollup of 8 pull requests

Successful merges:

 - #106072 (fix: misleading "add dyn keyword before derive macro" suggestion)
 - #106859 (Suggestion for type mismatch when we need a u8 but the programmer wrote a char literal)
 - #106863 (Remove various double spaces in compiler source comments.)
 - #106865 (Add explanation comment for GUI test)
 - #106867 (Fix the stability attributes for `std::os::fd`.)
 - #106878 (Add regression test for #92157)
 - #106879 (Add regression test for #42114)
 - #106880 (doc: fix typo)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
 2023-01-15 00:16:09 +00:00
Matthias Krüger
cdf462275a
Rollup merge of #106880 - tspiteri:borrowing-sub-typo, r=cuviper 
doc: fix typo
 2023-01-15 01:01:39 +01:00
Matthias Krüger
30b963c05c
Rollup merge of #106879 - JohnTitor:issue-42114, r=compiler-errors 
Add regression test for #42114

Closes #42114
r? compiler-errors
Signed-off-by: Yuki Okushi <jtitor@2k36.org>
 2023-01-15 01:01:39 +01:00
Matthias Krüger
08ef0ce056
Rollup merge of #106878 - JohnTitor:issue-92157, r=compiler-errors 
Add regression test for #92157

Closes #92157
r? compiler-errors
Signed-off-by: Yuki Okushi <jtitor@2k36.org>
 2023-01-15 01:01:38 +01:00
Matthias Krüger
445e3841da
Rollup merge of #106867 - sunfishcode:sunfishcode/std-os-fd-stable-version, r=m-ou-se 
Fix the stability attributes for `std::os::fd`.

As `@bjorn3` pointed out [here], I used the wrong stability attribute in #98368 when making `std::os::fd` public. I set it to Rust 1.63, which was when io-safety was stabilized, but it should be Rust 1.66, which was when `std::os::fd` was stabilized.

[here]: https://github.com/rust-lang/rust/pull/98368#discussion_r1063721420
 2023-01-15 01:01:38 +01:00
Matthias Krüger
8843335451
Rollup merge of #106865 - GuillaumeGomez:add-gui-test-explanation, r=notriddle 
Add explanation comment for GUI test

r? `@notriddle`
 2023-01-15 01:01:37 +01:00
Matthias Krüger
cc02ecc010
Rollup merge of #106863 - anden3:compiler-double-spaces, r=Nilstrieb 
Remove various double spaces in compiler source comments.

Was asked to do it by `@Nilstrieb`
 2023-01-15 01:01:37 +01:00
Matthias Krüger
980bf1979e
Rollup merge of #106859 - tialaramex:master, r=Nilstrieb 
Suggestion for type mismatch when we need a u8 but the programmer wrote a char literal

Today Rust just points out that we have a char and we need a u8, but if I wrote 'A' then I could fix this by just writing b'A' instead. This code should detect the case where we're about to report a type mismatch of this kind, and the programmer wrote a char literal, and the char they wrote is ASCII, so therefore just prefixing b to make a byte literal will do what they meant.

I have definitely written this mistake more than once, it's not difficult to figure out what to do, but the compiler might as well tell us anyway.

I provided a test with two simple examples where the suggestion is appropriate, and one where it is not because the char literal is not ASCII, showing that the suggestion is only triggered in the former cases.

I have contributed only a small typo doc fix before, so this is my first substantive rustc change.
 2023-01-15 01:01:36 +01:00
Matthias Krüger
d7fcd01f67
Rollup merge of #106072 - eopb:dyn-derive, r=estebank 
fix: misleading "add dyn keyword before derive macro" suggestion

Fixes #106071
 2023-01-15 01:01:36 +01:00
David Tolnay
23501703fb
Document guarantees about BinaryHeap invariant 2023-01-14 13:28:30 -08:00
David Tolnay
aedb756020
Leak amplification for peek_mut() to ensure BinaryHeap's invariant is always met 2023-01-14 13:28:22 -08:00
David Tolnay
4fe167f83a
Add test of leaking a binary_heap PeekMut 2023-01-14 13:28:14 -08:00
Nick Lamb
130d02b62e Improve E0308: suggest user meant to use byte literal, w/ tests and fix 
suggested by Nilstrieb

Co-authored-by: nils <48135649+Nilstrieb@users.noreply.github.com>
 2023-01-14 21:27:14 +00:00
Trevor Spiteri
208b781bda doc: fix typo 2023-01-14 22:09:14 +01:00
bors
afaf3e07aa Auto merge of #106866 - matthiaskrgr:rollup-r063s44, r=matthiaskrgr 
Rollup of 8 pull requests

Successful merges:

 - #105526 (libcore: make result of iter::from_generator Clone)
 - #106563 (Fix `unused_braces` on generic const expr macro call)
 - #106661 (Stop probing for statx unless necessary)
 - #106820 (Deprioritize fulfillment errors that come from expansions.)
 - #106828 (rustdoc: remove `docblock` class from notable trait popover)
 - #106849 (Allocate one less vec while parsing arrays)
 - #106855 (rustdoc: few small cleanups)
 - #106860 (Remove various double spaces in the libraries.)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
 2023-01-14 20:53:37 +00:00
Yuki Okushi
cf5be0c3ac
Add regression test for #42114 
Signed-off-by: Yuki Okushi <jtitor@2k36.org>
 2023-01-15 05:52:22 +09:00
Yuki Okushi
aa51a0f19a
Add regression test for #92157 
Signed-off-by: Yuki Okushi <jtitor@2k36.org>
 2023-01-15 05:47:24 +09:00
Dan Gohman
287c65838c Fix the stability attributes for std::os::fd. 
As @bjorn3 pointed out [here], I used the wrong stability attribute in #98368
when making `std::os::fd` public. I set it to Rust 1.63, which was when
io-safety was stabilized, but it should be Rust 1.66, which was when
`std::os::fd` was stabilized.

[here]: https://github.com/rust-lang/rust/pull/98368#discussion_r1063721420
 2023-01-14 09:47:34 -08:00
Matthias Krüger
e0eb63a73c
Rollup merge of #106860 - anden3:doc-double-spaces, r=Dylan-DPC 
Remove various double spaces in the libraries.

I was just pretty bothered by this when reading the source for a function, and was suggested to check if this happened elsewhere.
 2023-01-14 18:45:29 +01:00
Matthias Krüger
bc0c816410
Rollup merge of #106855 - klensy:rd-s, r=notriddle 
rustdoc: few small cleanups
 2023-01-14 18:45:28 +01:00
Matthias Krüger
9db8e6d5e9
Rollup merge of #106849 - WaffleLapkin:unvec, r=Nilstrieb 
Allocate one less vec while parsing arrays

Probably does not matter, but imo a little bit nicer.
 2023-01-14 18:45:28 +01:00
Matthias Krüger
14fbc21466
Rollup merge of #106828 - notriddle:notriddle/notable-trait-docblock, r=GuillaumeGomez 
rustdoc: remove `docblock` class from notable trait popover

This commit builds on b72de9be74, which removes the `docblock` class from the All Items page, and 9457380ac9, which removes the `docblock` class from the item decl.

Fixes #92974
 2023-01-14 18:45:27 +01:00
Matthias Krüger
f04f97cea4
Rollup merge of #106820 - m-ou-se:macro-type-error-thing, r=estebank 
Deprioritize fulfillment errors that come from expansions.

Fixes (part of?) #69455
 2023-01-14 18:45:27 +01:00
Matthias Krüger
43134714f5
Rollup merge of #106661 - mjguzik:linux_statx, r=Mark-Simulacrum 
Stop probing for statx unless necessary

As is the current toy program:
fn main() -> std::io::Result<()> {
    use std::fs;

    let metadata = fs::metadata("foo.txt")?;

    assert!(!metadata.is_dir());
    Ok(())
}

... observed under strace will issue:
[snip]
statx(0, NULL, AT_STATX_SYNC_AS_STAT, STATX_ALL, NULL) = -1 EFAULT (Bad address) statx(AT_FDCWD, "foo.txt", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=0, ...}) = 0

While statx is not necessarily always present, checking for it can be delayed to the first error condition. Said condition may very well never happen, in which case the check got avoided altogether.

Note this is still suboptimal as there still will be programs issuing it, but bulk of the problem is removed.

Tested by forbidding the syscall for the binary and observing it correctly falls back to newfstatat.

While here tidy up the commentary, in particular by denoting some problems with the current approach.
 2023-01-14 18:45:26 +01:00
Matthias Krüger
d7bc758638
Rollup merge of #106563 - clubby789:gce-macro-braces, r=TaKO8Ki 
Fix `unused_braces` on generic const expr macro call

Fixes #106545

`@rustbot` label +A-const-generics +A-lint
 2023-01-14 18:45:26 +01:00
Matthias Krüger
085d2f1f09
Rollup merge of #105526 - Xiretza:iter-from-generator-derive, r=scottmcm 
libcore: make result of iter::from_generator Clone

`@rustbot` label +A-generators
 2023-01-14 18:45:25 +01:00
bors
b8f9cb345a Auto merge of #106696 - kylematsuda:early-binder, r=lcnr 
Switch to `EarlyBinder` for `const_param_default` and `impl_trait_ref` queries

Part of the work to close #105779 and implement https://github.com/rust-lang/types-team/issues/78.

Several queries `X` have a `bound_X` variant that wraps the output in `EarlyBinder`. This PR adds `EarlyBinder` to the return type of  `const_param_default` and `impl_trait_ref`, and removes their `bound_X` variants.

r? `@lcnr`
 2023-01-14 17:44:30 +00:00
Guillaume Gomez
de34489a01 Add explanation for GUI test 2023-01-14 18:30:33 +01:00
André Vennberg
2fea03f5e6 Fix some missed double spaces. 2023-01-14 18:26:38 +01:00