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Rollup of 13 pull requests #82481

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LeSeulArtichaut and others added 30 commits February 19, 2021 17:50
This is in preparation to upgrade to 8.0.1, so the next commit
can contain more meaningful diffs.
This bypasses tidy's complaints about tab indent. Also, this lets us
remove comments while keeping the MIT license comment.
Turn inlining threshold into optional values to make it possible to
configure different defaults depending on the current mir-opt-level.
This improves help messages in two cases:

- When expected type is `T` and found type is `&T`, we now look through blocks
  and suggest dereferencing the expression of the block, rather than the whole
  block.

- In the above case, if the expression is an `&`, we not suggest removing the
  `&` instead of adding `*`.

Both of these are demonstrated in the regression test. Before this patch the
first error in the test would be:

    error[E0308]: `if` and `else` have incompatible types
     --> test.rs:8:9
      |
    5 | /     if true {
    6 | |         a
      | |         - expected because of this
    7 | |     } else {
    8 | |         b
      | |         ^ expected `usize`, found `&usize`
    9 | |     };
      | |_____- `if` and `else` have incompatible types
      |
    help: consider dereferencing the borrow
      |
    7 |     } else *{
    8 |         b
    9 |     };
      |

Now:

    error[E0308]: `if` and `else` have incompatible types
     --> test.rs:8:9
      |
    5 | /     if true {
    6 | |         a
      | |         - expected because of this
    7 | |     } else {
    8 | |         b
      | |         ^
      | |         |
      | |         expected `usize`, found `&usize`
      | |         help: consider dereferencing the borrow: `*b`
    9 | |     };
      | |_____- `if` and `else` have incompatible types

The second error:

    error[E0308]: `if` and `else` have incompatible types
      --> test.rs:14:9
       |
    11 | /     if true {
    12 | |         1
       | |         - expected because of this
    13 | |     } else {
    14 | |         &1
       | |         ^^ expected integer, found `&{integer}`
    15 | |     };
       | |_____- `if` and `else` have incompatible types
       |
    help: consider dereferencing the borrow
       |
    13 |     } else *{
    14 |         &1
    15 |     };
       |

now:

    error[E0308]: `if` and `else` have incompatible types
      --> test.rs:14:9
       |
    11 | /     if true {
    12 | |         1
       | |         - expected because of this
    13 | |     } else {
    14 | |         &1
       | |         ^-
       | |         ||
       | |         |help: consider removing the `&`: `1`
       | |         expected integer, found `&{integer}`
    15 | |     };
       | |_____- `if` and `else` have incompatible types

Fixes rust-lang#82361
`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
Rebases and makes changes required by the recent merge of rust-lang#81837.
It makes it clearer that the `Namespace` is the one requested by the
disambiguator, rather than the actual namespace of the item. It said
that in the docs before, but now you can tell in the code so it reduces
the potential for confusion.
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 rust-lang#79989 to avoid regressing performance due to using `mem::forget` over `intrinsics::forget`~~.
…nup, r=jyn514

rustdoc: Name fields of `ResolutionFailure::WrongNamespace`

It makes it clearer that the `Namespace` is the one requested by the
disambiguator, rather than the actual namespace of the item. It said
that in the docs before, but now you can tell in the code so it reduces
the potential for confusion.
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 rust-lang#79549 originally authored by `@YenForYang.` Changes from that PR:

- Squashed all commits from rust-lang#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.`
…n-here, r=estebank

Do not consider using a semicolon inside of a different-crate macro

Fixes rust-lang#81943
… r=jyn514

Prevent to compute Item attributes twice

I came across this case when working on another part of rustdoc. Not a game changer but a nice little improvement.

cc `@camelid`

r? `@jyn514`
…pastorino

Cleanup `PpMode` and friends

This PR:
 - Separates `PpSourceMode` and `PpHirMode` to remove invalid states
 - Renames the variant to remove the redundant `Ppm` prefix
 - Adds basic documentation for the different pretty-print modes
 - Cleanups some code to make it more idiomatic

Not sure if this is actually useful, but it looks cleaner to me.
…umeGomez

Update normalize.css to 8.0.1

From From https://github.com/necolas/normalize.css/releases/tag/8.0.1.

The old version was 3.0.0, from 2014. The new version is from 2018.

I noticed when looking at frontend performance for rustdoc that this file was out of date. The URL in the 3.0.0 license header now resolves to an incorrect destination. And generally it seems good to be up-to-date.

Before-and-after images, plus diff, under details. TL;DR: Nothing changes except a slight adjustment to line height.

<details>

![with-normalize-8 0 1](https://user-images.githubusercontent.com/220205/108581849-bd5c8800-72e4-11eb-9150-78c8d67ca37a.png)

![with-normalize-3 0 0](https://user-images.githubusercontent.com/220205/108581848-bcc3f180-72e4-11eb-8b45-0cd1415a51e5.png)

![diff](https://user-images.githubusercontent.com/220205/108581890-dfeea100-72e4-11eb-93c5-6284492f54a9.png)

</details>
AST: Remove some unnecessary boxes
Improve error msgs when found type is deref of expected

This improves help messages in two cases:

- When expected type is `T` and found type is `&T`, we now look through blocks
  and suggest dereferencing the expression of the block, rather than the whole
  block.

- In the above case, if the expression is an `&`, we not suggest removing the
  `&` instead of adding `*`.

Both of these are demonstrated in the regression test. Before this patch the
first error in the test would be:

    error[E0308]: `if` and `else` have incompatible types
     --> test.rs:8:9
      |
    5 | /     if true {
    6 | |         a
      | |         - expected because of this
    7 | |     } else {
    8 | |         b
      | |         ^ expected `usize`, found `&usize`
    9 | |     };
      | |_____- `if` and `else` have incompatible types
      |
    help: consider dereferencing the borrow
      |
    7 |     } else *{
    8 |         b
    9 |     };
      |

Now:

    error[E0308]: `if` and `else` have incompatible types
     --> test.rs:8:9
      |
    5 | /     if true {
    6 | |         a
      | |         - expected because of this
    7 | |     } else {
    8 | |         b
      | |         ^
      | |         |
      | |         expected `usize`, found `&usize`
      | |         help: consider dereferencing the borrow: `*b`
    9 | |     };
      | |_____- `if` and `else` have incompatible types

The second error:

    error[E0308]: `if` and `else` have incompatible types
      --> test.rs:14:9
       |
    11 | /     if true {
    12 | |         1
       | |         - expected because of this
    13 | |     } else {
    14 | |         &1
       | |         ^^ expected integer, found `&{integer}`
    15 | |     };
       | |_____- `if` and `else` have incompatible types
       |
    help: consider dereferencing the borrow
       |
    13 |     } else *{
    14 |         &1
    15 |     };
       |

now:

    error[E0308]: `if` and `else` have incompatible types
      --> test.rs:14:9
       |
    11 | /     if true {
    12 | |         1
       | |         - expected because of this
    13 | |     } else {
    14 | |         &1
       | |         ^-
       | |         ||
       | |         |help: consider removing the `&`: `1`
       | |         expected integer, found `&{integer}`
    15 | |     };
       | |_____- `if` and `else` have incompatible types

Fixes rust-lang#82361

---

r? ```@estebank```
…onymous-lifetime, r=estebank

Improve anonymous lifetime note to indicate the target span

Improvement for  rust-lang#81650
Cc rust-lang#81995

Message after this improvement:
(Improve note in the middle)

```
error[E0311]: the parameter type `T` may not live long enough
  --> src/main.rs:25:11
   |
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
   |              -- help: consider adding an explicit lifetime bound...: `T: 'a +`
25 |     scope.spawn(move |_| {
   |           ^^^^^
   |
note: the parameter type `T` must be valid for the anonymous lifetime defined on the function body at 24:40...
  --> src/main.rs:24:40
   |
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
   |                                        ^^^^^
note: ...so that the type `[closure@src/main.rs:25:17: 27:6]` will meet its required lifetime bounds
  --> src/main.rs:25:11
   |
25 |     scope.spawn(move |_| {
   |           ^^^^^
```

r? ```@estebank```
Add option to enable MIR inlining independently of mir-opt-level

Add `-Zinline-mir` option that enables MIR inlining independently of the
current MIR opt level. The primary use-case is enabling MIR inlining on the
default MIR opt level.

Turn inlining thresholds into optional values to make it possible to configure
different defaults depending on the current mir-opt-level (although thresholds
are yet to be used in such a manner).
@rustbot rustbot added the rollup A PR which is a rollup label Feb 24, 2021
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@bors r+ rollup=never p=5

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bors commented Feb 24, 2021

📌 Commit f47bc15 has been approved by Dylan-DPC

@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Feb 24, 2021
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bors commented Feb 24, 2021

⌛ Testing commit f47bc15 with merge a4e9c28e29fc87bb95e9dbab82714c22e70d25b3...

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bors commented Feb 24, 2021

💔 Test failed - checks-actions

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Feb 24, 2021
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@bors retry

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 25, 2021
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bors commented Feb 25, 2021

⌛ Testing commit f47bc15 with merge 0e1dd94b35a17941e3a2dde0c7677187b295f552...

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bors commented Feb 25, 2021

💥 Test timed out

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Feb 25, 2021
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@Dylan-DPC-zz Dylan-DPC-zz deleted the rollup-7slwkfg branch February 25, 2021 14:23
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