Some more small salsa memory improvements
This does limit our lru limits to 2^16 but if you want to set them higher than that you might as well not set them at all. Also makes `LRU` opt-in per query now, allowing us to drop all the unnecessary LRU stuff for most queries
feature: teach rust-analyzer to discover `linked_projects`
This PR's been a long-time coming, but like the title says, it introduces server-side project discovery and removes the extension hooks I previously introduced. I don't think this PR is ready to land, but here are the things I'm feeling squishy about:
- I don't think I like the idea of introducing the `cargo-metadata` command-but-for-everything-else in the `flycheck` module, but the progress reporting infrastructure was too convenient to pass up. Happy to move it elsewhere.
Here are the things I _know_ I need to change:
- For progress reporting, I'm extracting from a `serde_json::Value` that corresponds to `tracing_subsciber::fmt::Layer`'s JSON output. I'd like to make this a bit more structured/documented than the current nonsense I wrote.
- The progress reporting currently hardcodes "Buck"; it should be deriving that from the previously mentioned more-structured-output.
- This doesn't handle *reloading* when a corresponding buildfile is changed. It should be doing that.
<details>
<summary>Anyway, here's a video of rust-analyzer discovering a Buck target.</summary>
https://github.com/rust-lang/rust-analyzer/assets/2067774/be6cd9b9-2c9a-402d-847f-05f860a91df1
</details>
Rollup of 6 pull requests
Successful merges:
- #120990 (Suggest a borrow when using dbg)
- #127047 (fix least significant digits of f128 associated constants)
- #127709 (match lowering: Move `MatchPair` tree creation to its own module)
- #127770 (Update books)
- #127780 (Make sure trait def ids match before zipping args in `note_function_argument_obligation`)
- #127795 (Fix typos in RELEASES.md)
r? `@ghost`
`@rustbot` modify labels: rollup
Update books
## rust-lang/book
3 commits in f1e49bf7a8ea6c31ce016a52b8a4f6e1ffcfbc64..67fa536768013d9d5a13f3a06790521d511ef711
2024-07-12 21:21:45 UTC to 2024-07-05 17:35:06 UTC
- Use Rust 2021 Edition for mdBook (rust-lang/book#3974)
- Backport changes to chapter 11 (rust-lang/book#3969)
- Upgrade to Rust 1.79.0 (rust-lang/book#3968)
## rust-lang/edition-guide
2 commits in 941db8b3df45fd46cd87b50a5c86714b91dcde9c..5454de3d12b9ccc6375b629cf7ccda8264640aac
2024-07-14 07:06:34 UTC to 2024-07-12 06:05:29 UTC
- Update timeline etc. for Rust 2024
- 2024: Add note about never_type_fallback_flowing_into_unsafe lint level. (rust-lang/edition-guide#311)
## rust-embedded/book
1 commits in b10c6acaf0f43481f6600e95d4b5013446e29f7a..019f3928d8b939ec71b63722dcc2e46330156441
2024-07-11 17:46:10 UTC to 2024-07-11 17:46:10 UTC
- typo on tooling.md (rust-embedded/book#373)
## rust-lang/reference
9 commits in 1ae3deebc3ac16e276b6558e01420f8e605def08..e2f0bdc4031866734661dcdb548184bde1450baf
2024-06-29 16:59:51 +0000 to 2024-07-15 17:52:44 +0000
- Suppress type length limit test and note that it is not enforced (rust-lang/reference#1527)
- elaborate on slice wide pointer metadata (rust-lang/reference#1499)
- '.inst' in inline-assembly changed to '.insn' (rust-lang/reference#1453)
- Clarify that `asm!` blocks can be duplicated or deduplicated by the compiler (rust-lang/reference#1441)
- Add mdbook-spec (rust-lang/reference#1520)
- Add note about static libraries not linking their dependencies (rust-lang/reference#1472)
- more explicitly explain the UB around immutable extern statics (rust-lang/reference#1502)
- Improvements to `items/functions.md` (rust-lang/reference#1458)
- Enable mdbook smart-punctuation. (rust-lang/reference#1516)
## rust-lang/rust-by-example
1 commits in 658c6c27cb975b92227936024816986c2d3716fb..89aecb6951b77bc746da73df8c9f2b2ceaad494a
2024-07-11 12:33:43 UTC to 2024-07-11 12:33:43 UTC
- Update option_result.md (rust-lang/rust-by-example#1864)
## rust-lang/rustc-dev-guide
6 commits in d6e3a32a557db5902e714604def8015d6bb7e0f7..0c4d55cb59fe440d1a630e4e5774d043968edb3f
2024-07-15 15:16:43 UTC to 2024-07-01 19:05:14 UTC
- Improve documentation of MIR queries & passes (rust-lang/rustc-dev-guide#1434)
- Bump dependencies for date-check tool (rust-lang/rustc-dev-guide#2012)
- Fix typo: lists -> lints (rust-lang/rustc-dev-guide#2011)
- use "bootstrap" instead of "rustbuild" (rust-lang/rustc-dev-guide#2010)
- Fix grammar issue in optimize-build.md (rust-lang/rustc-dev-guide#2009)
- Update name of Fuchsia builder (rust-lang/rustc-dev-guide#2008)
