These methods are like the ones on `std::array::FixedSizeArray`
and in the crate `arraytools`.

Constify the following methods of `std::net::Ipv4Addr`:
 - `octets`
 - `is_loopback`
 - `is_private`
 - `is_link_local`
 - `is_shared`
 - `is_ietf_protocol_assignment`
 - `is_benchmarking`
 - `is_multicast`
 - `is_documentation`

Also insta-stabilizes these methods as const.

Possible because of the stabilization of const integer arithmetic and control flow.

Makes the following methods of `std::net::Ipv4Addr` unstable const under the `const_ipv4` feature:
 - `is_global`
 - `is_reserved`
 - `is_broadcast`
 - `to_ipv6_compatible`
 - `to_ipv6_mapped`

This results in all methods of `Ipv4Addr` being const.

Also adds tests for these methods in a const context.

The HIR Id trick is insufficient to prevent query cycles when optimizing
generators, since merely requesting a layout of a generator also
computes its `optimized_mir`.

Make no attempts to inline functions into generators within the same
crate to avoid query cycles.

`try_reserve` and `try_reserve_exact` docs refer to calling `reserve` and `reserve_exact`.
`try_reserve_exact` example uses `try_reserve` method instead of `try_reserve_exact`.

…le, r=LukasKalbertodt

Add a note for Ipv4Addr::to_ipv6_compatible

Previous discussion: rust-lang#75019

> I think adding a comment saying "This isn't typically the method you want; these addresses don't typically function on modern systems. Use `to_ipv6_mapped` instead." would be a good first step, whether this method gets marked as deprecated or not.

_Originally posted by @joshtriplett in rust-lang#75150 (comment)

…-to-array, r=Mark-Simulacrum

Add `[T; N]::as_[mut_]slice`

Part of me trying to populate arrays with a couple of basic useful methods, like slices already have. The ability to add methods to arrays were added in rust-lang#75212.  Tracking issue: rust-lang#76118

This adds:

```rust
impl<T, const N: usize> [T; N] {
    pub fn as_slice(&self) -> &[T];
    pub fn as_mut_slice(&mut self) -> &mut [T];
}
```

These methods are like the ones on `std::array::FixedSizeArray` and in the crate `arraytools`.

Make all methods of `std::net::Ipv4Addr` const

Make the following methods of `std::net::Ipv4Addr` unstable const under the `const_ipv4` feature:
 - `octets`
 - `is_loopback`
 - `is_private`
 - `is_link_local`
 - `is_global` (unstable)
 - `is_shared` (unstable)
 - `is_ietf_protocol_assignment` (unstable)
 - `is_benchmarking` (unstable)
 - `is_reserved` (unstable)
 - `is_multicast`
 - `is_broadcast`
 - `is_documentation`
 - `to_ipv6_compatible`
 - `to_ipv6_mapped`

This would make all methods of `Ipv6Addr` const.

Of these methods, `is_global`, `is_broadcast`, `to_ipv6_compatible`, and `to_ipv6_mapped` require a change in implementation.

Part of rust-lang#76205

Link to slice pattern in array docs

Fix a todo in rust-lang/reference#739 (comment)

…tic, r=petrochenkov

Replace MinGW library hack with heuristic controlling link mode

Depends on rust-lang#76158
Closes rust-lang#68887

…=scottmcm

Rename and expose LoopState as ControlFlow

Basic PR for rust-lang#75744. Addresses everything there except for documentation; lots of examples are probably a good idea.

…terator, r=jyn514

Move to intra-doc links for library/core/src/iter/traits/iterator.rs

Helps with rust-lang#75080.

@jyn514 We're almost finished with this issue. Thanks for mentoring. If you have other topics to work on just let me know, I will be around in Discord.

@rustbot modify labels: T-doc, A-intra-doc-links

Known issues:

* Link from `core` to `std` (rust-lang#74481):

    [`OsStr`]
    [`String`]
    [`VecDeque<T>`]

Read: adjust a FIXME reference

There's already another reference to rust-lang#42788 for basically the same problem, so lets reuse it here:
https://github.com/rust-lang/rust/blob/5e208efaa850efaa97495e81c49cf0f5767e8f49/library/std/src/io/mod.rs#L369-L376

r? @Dylan-DPC

Fix typos in vec try_reserve(_exact) docs

`try_reserve` and `try_reserve_exact` docs refer to calling `reserve` and `reserve_exact`.
`try_reserve_exact` example uses `try_reserve` method instead of `try_reserve_exact`.

…ic-morse

inliner: Avoid query cycles when optimizing generators

The HIR Id trick is insufficient to prevent query cycles when optimizing
generators, since merely requesting a layout of a generator also
computes its `optimized_mir`.

Make no attempts to inline functions into generators within the same
crate to avoid query cycles.

Fixes rust-lang#76181.

Update books

## reference

4 commits in 1b6c4b0afab97c0230433466c97167bbbe8445f6..25391dba46262f882fa846beefaff54a966a8fa5
2020-08-18 17:04:28 -0700 to 2020-09-02 07:22:55 -0700
- clarify when reading uninititalized memory is allowed (rust-lang/reference#852)
- Update patterns chapter, add rest patterns. (rust-lang/reference#876)
- Improve Type-Coersion Documentation (rust-lang/reference#843)
- Added variable back into example. (rust-lang/reference#880)

## book

3 commits in c0a6a61b8205da14ac955425f74258ffd8ee065d..e5ed97128302d5fa45dbac0e64426bc7649a558c
2020-08-14 14:21:49 -0500 to 2020-08-31 12:53:40 -0500
- Fix type mismatch in listing 10-5 (rust-lang/book#2441)
- Update ppendix-06-translation.md (rust-lang/book#2437)
- Correct no-listing-10-result-in-tests: Take tests module out of the main function (rust-lang/book#2430)

## rust-by-example

3 commits in 80a10e22140e28392b99d24ed02f4c6d8cb770a0..19f0a0372af497b34369cf182d9d16156cab2969
2020-08-08 09:56:46 -0300 to 2020-08-26 09:38:48 -0300
- prefer `length` over `size` when talking about number of elements vs. bytesize (rust-lang/rust-by-example#1372)
- Split out variable shadowing into a separate example (rust-lang/rust-by-example#1370)
- Update extern crate related sections (rust-lang/rust-by-example#1369)

## edition-guide

1 commits in bd6e4a9f59c5c1545f572266af77f5c7a5bad6d1..81f16863014de60b53de401d71ff904d163ee030
2020-07-12 17:37:08 -0500 to 2020-08-27 13:56:31 -0700
- Fix a small typo. (rust-lang/edition-guide#218)

…rker, r=jyn514

Use intra-doc links in `core::marker`

Part of rust-lang#75080.

Also cleaned up a few things.

---

@rustbot modify labels: A-intra-doc-links T-doc