Since the sorting function accounts for an `index` field, there's not much
reason to also be applying changes to the levenshtein distance. Instead,
we can just not treat `lev` as a filter if there's already a non-sentinel
value for `index`.

This change gives slightly more weight to the index and path part, as
search criteria, than it used to. This changes some of the test cases,
but not in any obviously-"worse" way, and, in particular, substring matches
are a bigger deal than levenshtein distances (we're assuming that a typo
is less likely than someone just not typing the entire name).

Based on
rust-lang#103710 (comment)

Switching them to `Break(())` and `Continue(())` instead.

libs-api would like to remove these constants, so stop using them in compiler to make the removal PR later smaller.

This prevents some strange blur-event-related bugs with the "?" command
by ensuring that the focus remains in the same spot when the settings
area closes.

This extends the special case with checkbox settings to also cover radios.

Since the current version of settings.js always nests things below
a div with ID `settings`, this rule always overrode the one above.

…-stop-doing-demerits, r=GuillaumeGomez

rustdoc: simplify JS search routine by not messing with lev distance

Since the sorting function accounts for an `index` field, there's not much reason to also be applying changes to the levenshtein distance. Instead, we can just not treat `lev` as a filter if there's already a non-sentinel value for `index`.

<details>

This change gives slightly more weight to the index and path part, as search criteria, than it used to. This changes some of the test cases, but not in any obviously-"worse" way, and, in particular, substring matches are a bigger deal than levenshtein distances (we're assuming that a typo is less likely than someone just not typing the entire name).

The biggest change is the addition of a `path_lev` field to result items. It's always zero if the search query has no parent path part and for type queries, making the check in the `sortResults` function a no-op. When it's present, it is used to implement different precedence for the parent path and the tail.

Consider the query `hashset::insert`, a test case [that already exists and can be found here](https://github.com/rust-lang/rust/blob/5c6a1681a9a7b815febdd9de2f840da338984e68/src/test/rustdoc-js-std/path-ordering.js). We want the ordering shown in the test case:

```
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'insert' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert_with' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert_owned' },
        { 'path': 'std::collections::hash_map::HashMap', 'name': 'insert' },
```

We do not want this ordering, which is the ordering that would occur if substring position took priority over `path_lev`:

```
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'insert' },
        { 'path': 'std::collections::hash_map::HashMap', 'name': 'insert' }, // BAD
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert_with' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert_owned' },
```

We also do not want `HashSet::iter` to appear before `HashMap::insert`, which is what would happen if `path_lev` took priority over the appearance of any substring match. This is why the `sortResults` function has `path_lev` sandwiched between a `index < 0` check and a `index` comparison check:

```
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'insert' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert_with' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'get_or_insert_owned' },
        { 'path': 'std::collections::hash_set::HashSet', 'name': 'iter' }, // BAD
        { 'path': 'std::collections::hash_map::HashMap', 'name': 'insert' },
```

The old code implemented a similar feature by manipulating the `lev` member based on whether a substring match was found and averaging in the path distance (`item.lev = name_lev + path_lev / 10`), so the path lev wound up acting like a tie breaker, but it gives slightly different results for `Vec::new`, [changing the test case](https://github.com/rust-lang/rust/pull/105796/files#diff-b346e2ef72a407915f438063c8c2c04f7a621df98923d441b41c0312211a5b21) because of the slight changes to ordering priority.

</details>

Based on rust-lang#103710 (comment)

Previews:

* https://notriddle.com/notriddle-rustdoc-demos/rustdoc-search-stop-doing-demerits/std/index.html
* https://notriddle.com/notriddle-rustdoc-demos/rustdoc-search-stop-doing-demerits-compiler/index.html

…able, r=spastorino

Make sure that RPITITs are not considered suggestable

Makes no sense to suggest `where impl Future<Output = ()>: Send`, for example.

…ign, r=tmiasko

Encode const mir for closures if they're const

Fixes rust-lang#106913

…didates-2, r=lcnr

Implement some candidates for the new solver (redux)

Based on rust-lang#106718, so the diff is hard to read without it. See [here](rust-lang/rust@98700cf...compiler-errors:rust:new-solver-new-candidates-2) for an easier view until that one lands.

Of note:
* 44af916020fb43c12070125c45b6dee4ec303bbc fixes a bug where we need to make the query response *inside* of a probe, or else we make no inference progress (I think)
* 50daad5acd2f163d03e7ffab942534f09bc36e2e implements `consider_assumption` for traits and predicates. I'm not sure if using `sup` here is necessary or if `eq` is fine.
* We decided that all of the `instantiate_constituent_tys_for_*` functions are verbose but ok, since they need to be exhaustive and the logic between each of them is not similar enough, right?

r? ``@lcnr``

Stop using `BREAK` & `CONTINUE` in compiler

Switching them to `Break(())` and `Continue(())` instead.

Entirely search-and-replace, though there's one spot where rustfmt insisted on a reformatting too.

libs-api would like to remove these constants (rust-lang#102697 (comment)), so stop using them in compiler to make the removal PR later smaller.

Correct typo

rust-lang#106718 (comment)

…stion, r=GuillaumeGomez

rustdoc: fix corner cases with "?" JS keyboard command

…etting-line, r=GuillaumeGomez

rustdoc: remove redundant CSS rule `#settings .setting-line`

Since the current version of settings.js always nests things below a div with ID `settings`, this rule always overrode the one above.