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bors
2fbb07525e Auto merge of #70427 - Centril:rollup-lrcad2c, r=Centril 
Rollup of 5 pull requests

Successful merges:

 - #68004 (permit negative impls for non-auto traits)
 - #70385 (Miri nits: comment and var name improvement)
 - #70411 (Fix for #62691: use the largest niche across all fields)
 - #70417 (parser: recover on `...` as a pattern, suggesting `..`)
 - #70424 (simplify match stmt)

Failed merges:

r? @ghost
 2020-03-26 12:33:18 +00:00
Mazdak Farrokhzad
608715bbd1
Rollup merge of #70424 - lcnr:nit, r=Centril 
simplify match stmt

We actually have a surprising amount of
```rust
match expr {
    $($p:pat)|+ => true,
    _ => false,
}
```
While I would prefer this to be replaced with `matches!`, most cases are
fairly readable anyway so we can just let them be for now.
 2020-03-26 13:32:20 +01:00
Mazdak Farrokhzad
37e186087c
Rollup merge of #70417 - rakshith-ravi:master, r=Centril 
parser: recover on `...` as a pattern, suggesting `..`

Fixes #70388

My first PR to rust. So please let me know if I'm doing something wrong.
 2020-03-26 13:32:18 +01:00
Mazdak Farrokhzad
f9d1378dd4
Rollup merge of #70411 - ogoffart:fix-62691, r=eddyb 
Fix for #62691: use the largest niche across all fields

fixes #62691

(The second commit is a small optimization but it makes the code less pretty and i don't know if it is worth it.)
 2020-03-26 13:32:17 +01:00
Mazdak Farrokhzad
20771ae5b9
Rollup merge of #70385 - RalfJung:miri-nits, r=eddyb 
Miri nits: comment and var name improvement

r? @eddyb
 2020-03-26 13:32:15 +01:00
Mazdak Farrokhzad
b0a63cb932
Rollup merge of #68004 - nikomatsakis:negative-impls, r=varkor 
permit negative impls for non-auto traits

This is a prototype impl that extends `impl !Trait` beyond auto traits. It is not integrated with coherence or anything else, and hence only serves to prevent downstream impls (but not to allow downstream crates to rely on the absence of such impls for coherence purposes).

Fixes https://github.com/rust-lang/rust/issues/66544

TODO:

- [x] need a test that you can't rely on negative impls for coherence purposes
- [x] test that negative impls cannot specialize positive ones
- [x] test that positive impls cannot specialize negative ones
- [x] extend negative impl to `Clone` in order to fully fix #66544
- [x] and maybe make `CoerceUnsized` unsafe? -- that problem is now split out into https://github.com/rust-lang/rust/issues/68015
- [x] introduce feature flag and prepare a write-up
- [x] improve diagnostics?
 2020-03-26 13:32:14 +01:00
Olivier Goffart
0b00c20465 Reorganize a bit the code and add a comment 2020-03-26 13:14:25 +01:00
Niko Matsakis
0d0702623f wip pacify the merciless ui tests 2020-03-26 07:41:26 -04:00
Niko Matsakis
011215b2c7 pacify the merciless x.py fmt 2020-03-26 06:52:58 -04:00
Niko Matsakis
c35801e160 use slice pattern instead of calling is_empty() and [0] 2020-03-26 06:52:58 -04:00
Niko Matsakis
b9e09d8f65 add test for negative specializes negative 2020-03-26 06:52:58 -04:00
Niko Matsakis
f5c09ed344 move stderr file too 2020-03-26 06:52:58 -04:00
Niko Matsakis
644b9a0a94 give the negative-impls-builtin test a more sensible name 2020-03-26 06:52:58 -04:00
Niko Matsakis
7107f6e606 comment the typeck-negative-impls-builtin test 2020-03-26 06:52:58 -04:00
Niko Matsakis
f66284778a move feature-gate-negative-impls test to traits/negative-impls 2020-03-26 06:52:58 -04:00
Niko Matsakis
73a55009ac convert to doc comments 2020-03-26 06:52:58 -04:00
Niko Matsakis
68aa798436 bump negative impls version to 1.44.0 2020-03-26 06:52:58 -04:00
Niko Matsakis
cc0d6d03f6 create a tracking issue and link to it 2020-03-26 06:52:57 -04:00
Niko Matsakis
fda3378e3f introduce negative_impls feature gate and document 
They used to be covered by `optin_builtin_traits` but negative impls
are now applicable to all traits, not just auto traits.

This also adds docs in the unstable book for the current state of auto traits.
 2020-03-26 06:52:55 -04:00
Niko Matsakis
65071708f8 make a custom error for overlap with negative impls 2020-03-26 06:52:26 -04:00
Niko Matsakis
e8a05e201e permit negative impls for non-auto traits 2020-03-26 06:27:45 -04:00
Bastian Kauschke
c21e25c262 simplify match stmt 2020-03-26 10:52:52 +01:00
Rakshith Ravi
73c82030e8 Throw error when encountering ... instead of .. while destructing a pattern 
Added tests and stderr output
 2020-03-26 13:25:34 +05:30
bors
3b1d735118 Auto merge of #70391 - RalfJung:miri, r=RalfJung 
update miri

Usually I'd wait until https://github.com/rust-lang/rust/pull/70226 lands which will break Miri again, but... the queue is empty (!), so whatever.^^

r? @ghost Cc @oli-obk
Fixes https://github.com/rust-lang/rust/issues/70346
 2020-03-26 07:36:21 +00:00
Ralf Jung
5d12f22f35 update miri 2020-03-26 08:21:30 +01:00
bors
a17dd36084 Auto merge of #70415 - Centril:rollup-1zttfvl, r=Centril 
Rollup of 6 pull requests

Successful merges:

 - #69866 (Rename `def_span` to `guess_head_span`)
 - #69878 (Tweak chained operators diagnostic)
 - #70375 (avoid catching InterpError)
 - #70386 (typeck: minor pattern typing improvements)
 - #70389 (borrowck: prefer "value" over "`_`" in diagnostics)
 - #70395 (Update cargo.)

Failed merges:

r? @ghost
 2020-03-26 02:22:26 +00:00
Mazdak Farrokhzad
16e9d3f0ca
Rollup merge of #70395 - ehuss:update-cargo, r=ehuss 
Update cargo.

8 commits in 7019b3ed3d539db7429d10a343b69be8c426b576..8a0d4d9c9abc74fd670353094387d62028b40ae9
2020-03-17 21:02:00 +0000 to 2020-03-24 17:57:04 +0000
- Re-implement proc-macro feature decoupling. (rust-lang/cargo#8028)
- Remove unused transitive dependencies: miniz_oxide, adler32 (rust-lang/cargo#8023)
- Fix bug with -Zfeatures=dev_dep and `check --profile=test`. (rust-lang/cargo#8027)
- Remove Config from CompileOptions. (rust-lang/cargo#8021)
- Add `rustless.org` to documented blocklist. (rust-lang/cargo#7922)
- Print colored warnings when build script panics (rust-lang/cargo#8017)
- Do not supply --crate-version flag to rustdoc if present in RUSTDOCFLAGS (rust-lang/cargo#8014)
- Add proc-macro to index, and new feature resolver. (rust-lang/cargo#8003)
 2020-03-26 03:21:33 +01:00
Mazdak Farrokhzad
7db48250cd
Rollup merge of #70389 - Centril:borrowck-no-underscores, r=mark-i-m 
borrowck: prefer "value" over "`_`" in diagnostics

Fixes https://github.com/rust-lang/rust/issues/67565.

r? @pnkfelix @matthewjasper
cc @mark-i-m
 2020-03-26 03:21:31 +01:00
Mazdak Farrokhzad
ca7dfb1cfa
Rollup merge of #70386 - Centril:patty, r=estebank 
typeck: minor pattern typing improvements

r? @estebank
 2020-03-26 03:21:30 +01:00
Mazdak Farrokhzad
ef01fe6bbc
Rollup merge of #70375 - RalfJung:check-defined-err, r=oli-obk 
avoid catching InterpError

Avoid raising and then capturing `InterpError` for the definedness check.

Cc https://github.com/rust-lang/rust/issues/69297
r? @oli-obk
 2020-03-26 03:21:29 +01:00
Mazdak Farrokhzad
9fa4953aa4
Rollup merge of #69878 - estebank:chained-ops, r=Centril 
Tweak chained operators diagnostic

Use more selective spans
Improve suggestion output
Be more selective when displaying suggestions
Silence some knock-down type errors

r? @Centril
 2020-03-26 03:21:27 +01:00
Mazdak Farrokhzad
b105ac4018
Rollup merge of #69866 - estebank:guess_head_span, r=eddyb 
Rename `def_span` to `guess_head_span`

r? @eddyb
 2020-03-26 03:21:26 +01:00
Mazdak Farrokhzad
da10963357 typeck/pat: address review comments 2020-03-26 02:29:42 +01:00
Mazdak Farrokhzad
632c0af38f borrowck diagnostics: address review comments. 2020-03-26 02:13:17 +01:00
Esteban Küber
4832f3fd5d review comments 2020-03-25 18:10:18 -07:00
Esteban Küber
89571a1bbc Tweak chained operators diagnostic 
Use more selective spans
Improve suggestion output
Be more selective when displaying suggestions
Silence some knock-down type errors
 2020-03-25 17:13:04 -07:00
Esteban Küber
f18a6dcec0 Rename def_span to guess_head_span 2020-03-25 16:45:12 -07:00
Olivier Goffart
bb3e513a2c Revert previous commit and make the optimisation in a nicer way 2020-03-26 00:20:39 +01:00
Ralf Jung
0fdb7df32b avoid catching InterpError 2020-03-26 00:16:05 +01:00
bors
e4519e2b96 Auto merge of #70412 - Dylan-DPC:rollup-yuq2mfy, r=Dylan-DPC 
Rollup of 5 pull requests

Successful merges:

 - #69700 (Rename LayoutDetails to just Layout.)
 - #70392 (Make x.py compatible with python 3.8.)
 - #70406 (Clean up E0458 explanation)
 - #70407 (Avoid tagging as I-nominated on toolstate breakage)
 - #70409 (gitignore: allow target to be a symlink)

Failed merges:

 - #70375 (avoid catching InterpError)

r? @ghost
 2020-03-25 22:56:53 +00:00
Dylan DPC
84a2865963
Rollup merge of #70409 - mathstuf:gitignore-target-symlink, r=Mark-Simulacrum 
gitignore: allow target to be a symlink

Following rust-lang/cargo#4944.
 2020-03-25 23:53:04 +01:00
Dylan DPC
5bccef5d86
Rollup merge of #70407 - spastorino:avoid-nomination-on-toolstate-breakage, r=Mark-Simulacrum 
Avoid tagging as I-nominated on toolstate breakage

r? @Mark-Simulacrum
 2020-03-25 23:53:03 +01:00
Dylan DPC
15359b0d57
Rollup merge of #70406 - GuillaumeGomez:cleanup-e0458, r=Dylan-DPC 
Clean up E0458 explanation

r? @Dylan-DPC
 2020-03-25 23:53:01 +01:00
Dylan DPC
0fa57e4595
Rollup merge of #70392 - brain0:fixxpy, r=Mark-Simulacrum 
Make x.py compatible with python 3.8.

Python 3.8 removes the `time.clock()` function, use `time.perf_counter()` instead.
 2020-03-25 23:52:59 +01:00
Dylan DPC
818da9eb4d
Rollup merge of #69700 - anyska:layout-details-rename, r=oli-obk 
Rename LayoutDetails to just Layout.
 2020-03-25 23:52:57 +01:00
Olivier Goffart
81006f644d Optimize slightly by avoiding to call Niche::reserve when not needed 2020-03-25 23:08:36 +01:00
Olivier Goffart
4d77d01096 Fix for #62691: use the largest niche across all fields 
fixes #62691
 2020-03-25 23:08:23 +01:00
Ben Boeckel
1dc722c292 gitignore: allow target to be a symlink 
Following rust-lang/cargo#4944.
 2020-03-25 17:30:40 -04:00
Santiago Pastorino
5884c9d08f
Revert "Automatically tag as nominated for T-compiler" 
This reverts commit 46a8fcdf3c.
 2020-03-25 17:15:12 -03:00
Guillaume Gomez
eaa93c0171 Clean up E0458 explanation 2020-03-25 20:49:36 +01:00