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bors d4822c2d84 Auto merge of #127589 - notriddle:notriddle/search-sem-3, r=GuillaumeGomez
rustdoc-search: simplify rules for generics and type params

**Heads up!**: This PR is a follow-up that depends on #124544. It adds 12dc24f460, a change to the filtering behavior, and 9900ea48b5, a minor ranking tweak.

Part of https://github.com/rust-lang/rust-project-goals/issues/112

This PR overturns https://github.com/rust-lang/rust/pull/109802

## Preview

* no results: [`Box<[A]> -> Vec<B>`](http://notriddle.com/rustdoc-html-demo-12/search-sem-3/std/index.html?search=Box%3C%5BA%5D%3E%20-%3E%20Vec%3CB%3E)
* results: [`Box<[A]> -> Vec<A>`](http://notriddle.com/rustdoc-html-demo-12/search-sem-3/std/index.html?search=Box%3C%5BA%5D%3E%20-%3E%20Vec%3CA%3E)
* [`T -> U`](http://notriddle.com/rustdoc-html-demo-12/search-sem-3/std/index.html?search=T%20-%3E%20U)
* [`Cx -> TyCtxt`](http://notriddle.com/rustdoc-html-demo-12/search-sem-3-compiler/rustdoc/index.html?search=Cx%20-%3E%20TyCtxt)

![image](https://github.com/user-attachments/assets/015ae28c-7469-4f7f-be03-157d28d7ec97)

## Description

This commit is a response to feedback on the displayed type signatures results, by making generics act stricter.

- Order within generics is significant. This means `Vec<Allocator>` now matches only with a true vector of allocators, instead of matching the second type param. It also makes unboxing within generics stricter, so `Result<A, B>` only matches if `B` is in the error type and `A` is in the success type. The top level of the function search is unaffected.
- Generics are only "unboxed" if a type is explicitly opted into it. References and tuples are hardcoded to allow unboxing, and Box, Rc, Arc, Option, Result, and Future are opted in with an unstable attribute. Search result unboxing is the process that allows you to search for `i32 -> str` and get back a function with the type signature `&Future<i32> -> Box<str>`.
- Instead of ranking by set overlap, it ranks by the number of items in the type signature. This makes it easier to find single type signatures like transmute.

## Find the discussion on

* <https://rust-lang.zulipchat.com/#narrow/stream/393423-t-rustdoc.2Fmeetings/topic/meeting.202024-07-08/near/449965149>
* <https://github.com/rust-lang/rust/pull/124544#issuecomment-2204272265>
* <https://rust-lang.zulipchat.com/#narrow/channel/266220-t-rustdoc/topic/deciding.20on.20semantics.20of.20generics.20in.20rustdoc.20search>
2024-11-11 12:26:00 +00:00
.github Merge pull request #13587 from Kobzol/ci-remove-bors 2024-11-07 17:42:31 +00:00
compiler Auto merge of #127589 - notriddle:notriddle/search-sem-3, r=GuillaumeGomez 2024-11-11 12:26:00 +00:00
library Auto merge of #127589 - notriddle:notriddle/search-sem-3, r=GuillaumeGomez 2024-11-11 12:26:00 +00:00
LICENSES Rename LICENSES/GPL-2.0.txt into LICENSES/GPL-2.0-only.txt 2024-09-06 16:01:46 +02:00
src Auto merge of #127589 - notriddle:notriddle/search-sem-3, r=GuillaumeGomez 2024-11-11 12:26:00 +00:00
tests Auto merge of #127589 - notriddle:notriddle/search-sem-3, r=GuillaumeGomez 2024-11-11 12:26:00 +00:00
.clang-format Add .clang-format 2024-06-26 05:56:00 +08:00
.editorconfig Only use max_line_length = 100 for *.rs 2023-07-10 15:18:36 -07:00
.git-blame-ignore-revs Add rustfmt 2024 reformatting to git blame ignore 2024-09-23 10:02:04 +02:00
.gitattributes Rename config.toml.example to config.example.toml 2023-03-11 14:10:00 -08:00
.gitignore Rollup merge of #129620 - WaffleLapkin:flake, r=Noratrieb 2024-10-17 20:47:29 +02:00
.gitmodules Update to LLVM 19.1.0 2024-09-20 14:41:36 -07:00
.ignore Add .ignore file to make config.toml searchable in vscode 2024-06-24 10:15:16 +02:00
.mailmap Add a bunch of mailmap entries 2024-11-01 20:10:36 +01:00
Cargo.lock Update minifer version to 0.3.2 2024-11-10 16:32:22 +01:00
Cargo.toml update rustc-std-workspace crates 2024-11-04 07:45:15 +01:00
CODE_OF_CONDUCT.md Remove the code of conduct; instead link https://www.rust-lang.org/conduct.html 2019-10-05 22:55:19 +02:00
config.example.toml refactor(config): remove FIXME statement in comment of omit-git-hash 2024-11-01 20:19:01 +03:00
configure Ensure ./configure works when configure.py path contains spaces 2024-02-16 18:57:22 +00:00
CONTRIBUTING.md fix: Update CONTRIBUTING.md recommend -> recommended 2023-11-16 23:57:09 +05:30
COPYRIGHT Update COPYRIGHT file 2022-10-30 10:23:14 -04:00
INSTALL.md add clarity for custom path installation 2024-10-06 07:37:00 -05:00
LICENSE-APACHE Remove appendix from LICENCE-APACHE 2019-12-30 14:25:53 +00:00
LICENSE-MIT LICENSE-MIT: Remove inaccurate (misattributed) copyright notice 2017-07-26 16:51:58 -07:00
README.md Remove CI badge from README and book 2024-11-07 18:57:29 +01:00
RELEASES.md relnotes: fix stabilizations of assume_init 2024-10-22 10:47:42 -07:00
REUSE.toml Fix licensing information in REUSE.toml 2024-09-06 16:01:47 +02:00
rust-bors.toml Increase timeout for new bors bot 2024-03-13 08:31:07 +01:00
rustfmt.toml chore(style): sync submodule exclusion list between tidy and rustfmt 2024-11-02 16:43:10 +03:00
triagebot.toml Rollup merge of #132878 - aDotInTheVoid:less-pings-for-mark, r=GuillaumeGomez 2024-11-10 19:12:26 -05:00
x fix(x): fix a regex used to find python executable 2024-11-06 16:40:02 +03:00
x.ps1 use & instead of start-process in x.ps1 2023-12-09 09:46:16 -05:00
x.py Fix recent python linting errors 2023-08-02 04:40:28 -04:00

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