Applied `#![deny(unsafe_op_in_unsafe_fn)]` in library/std/src/wasi
partial fix for #73904
There are still more that was not applied in [mod.rs]( 38fab2ea92/library/std/src/sys/wasi/mod.rs) and that is due to its using files from `../unsupported`
like:
```
#[path = "../unsupported/cmath.rs"]
pub mod cmath;
```
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-nursery/reference#852)
- Update patterns chapter, add rest patterns. (rust-lang-nursery/reference#876)
- Improve Type-Coersion Documentation (rust-lang-nursery/reference#843)
- Added variable back into example. (rust-lang-nursery/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)
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#76181.
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`.
Move to intra-doc links for library/core/src/iter/traits/iterator.rs
Helps with #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` (#74481):
[`OsStr`]
[`String`]
[`VecDeque<T>`]
Rename and expose LoopState as ControlFlow
Basic PR for #75744. Addresses everything there except for documentation; lots of examples are probably a good idea.
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 #76205
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 #75212. Tracking issue: #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`.
Add a note for Ipv4Addr::to_ipv6_compatible
Previous discussion: #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 https://github.com/rust-lang/rust/pull/75150#issuecomment-680267745_
Avoid rehashing Fingerprint as a map key
This introduces a no-op `Unhasher` for map keys that are already hash-
like, for example `Fingerprint` and its wrapper `DefPathHash`. For these
we can directly produce the `u64` hash for maps. The first use of this
is `def_path_hash_to_def_id: Option<UnhashMap<DefPathHash, DefId>>`.
cc #56308
r? @eddyb
Improve recovery on malformed format call
The token following a format expression should be a comma. However, when it is replaced with a similar token (such as a dot), then the corresponding error is emitted, but the token is treated as a comma, and the parsing step continues.
r? @petrochenkov
flt2dec: properly handle uninitialized memory
The float-to-str code currently uses uninitialized memory incorrectly (see https://github.com/rust-lang/rust/issues/76092). This PR fixes that.
Specifically, that code used `&mut [T]` as "out references", but it would be incorrect for the caller to actually pass uninitialized memory. So the PR changes this to `&mut [MaybeUninit<T>]`, and then functions return a `&[T]` to the part of the buffer that they initialized (some functions already did that, indirectly via `&Formatted`, others were adjusted to return that buffer instead of just the initialized length).
What I particularly like about this is that it moves `unsafe` to the right place: previously, the outermost caller had to use `unsafe` to assert that things are initialized; now it is the functions that do the actual initializing which have the corresponding `unsafe` block when they call `MaybeUninit::slice_get_ref` (renamed in https://github.com/rust-lang/rust/pull/76217 to `slice_assume_init_ref`).
Reviewers please be aware that I have no idea how any of this code actually works. My changes were purely mechanical and type-driven. The test suite passes so I guess I didn't screw up badly...
Cc @sfackler this is somewhat related to your RFC, and possibly some of this code could benefit from (a generalized version of) the API you describe there. But for now I think what I did is "good enough".
Fixes https://github.com/rust-lang/rust/issues/76092.
`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`.
compiler: use `OnceCell` from std
Fixes#76192
The only remaining direct use of `lazy_static` crate is in `src/bootstrap` but I am not sure how I can remove that dependency for now.
r? @matklad
Rollup of 14 pull requests
Successful merges:
- #74880 (Add trailing comma support to matches macro)
- #76074 (Add new `-Z dump-mir-spanview` option)
- #76088 (Add more examples to lexicographic cmp on Iterators.)
- #76099 (Add info about `!` and `impl Trait`)
- #76126 (Use "Fira Sans" for crate list font)
- #76132 (Factor out StmtKind::MacCall fields into `MacCallStmt` struct)
- #76143 (Give a better error message for duplicate built-in macros)
- #76158 (Stabilise link-self-contained option)
- #76201 (Move to intra-doc links for library/core/src/panic.rs)
- #76206 (Make all methods of `std::net::Ipv6Addr` const)
- #76207 (# Move to intra-doc links for library/core/src/clone.rs)
- #76212 (Document lint missing_doc_code_examples is nightly-only)
- #76218 (lexer: Tiny improvement to shebang detection)
- #76221 (Clean up header in `iter` docs for `for` loops)
Failed merges:
r? @ghost
This introduces a no-op `Unhasher` for map keys that are already hash-
like, for example `Fingerprint` and its wrapper `DefPathHash`. For these
we can directly produce the `u64` hash for maps. The first use of this
is `def_path_hash_to_def_id: Option<UnhashMap<DefPathHash, DefId>>`.
lexer: Tiny improvement to shebang detection
Lexer now discerns between regular comments and doc comments, so use that.
The change only affects the choice of reported errors.
Make all methods of `std::net::Ipv6Addr` const
Make the following methods of `std::net::Ipv6Addr` unstable const under the `const_ipv6` feature:
- `segments`
- `is_unspecified`
- `is_loopback`
- `is_global` (unstable)
- `is_unique_local`
- `is_unicast_link_local_strict`
- `is_documentation`
- `multicast_scope`
- `is_multicast`
- `to_ipv4_mapped`
- `to_ipv4`
This would make all methods of `Ipv6Addr` const.
Changed the implementation of `is_unspecified` and `is_loopback` to use a `match` instead of `==`, all other methods did not require a change.
All these methods are dependent on `segments`, the current implementation of which requires unstable `const_fn_transmute` ([PR#75085](https://github.com/rust-lang/rust/pull/75085)).
Part of #76205
Move to intra-doc links for library/core/src/panic.rs
Helps with #75080.
@rustbot modify labels: T-doc, A-intra-doc-links, T-rustdoc
Known issues:
* Link from `core` to `std` (#74481):
[`set_hook`]
[`String`]
Give a better error message for duplicate built-in macros
Minor follow-up to https://github.com/rust-lang/rust/pull/75176 giving a better error message for duplicate builtin macros. This would have made it a little easier to debug.
r? @petrochenkov
Use "Fira Sans" for crate list font
Fira Sans is what's used for module lists and other item lists.
Previously, the default body font, "Source Serif Pro", was used for
crate lists, which didn't visually match other item lists.
@rustbot modify labels: T-rustdoc
