Move folding & visiting traits into type library
This is a rework of #107712, following feedback on that PR.
In particular, this version uses trait aliases to reduce the API churn for trait consumers. Doing so requires a workaround for #107747 until its fix in #107803 is merged into the stage0 compiler; this workaround, which uses conditional compilation based on the `bootstrap` configuration predicate, sits in dedicated commit b409329c for ease of reversion.
The possibility of the `rustc_middle` crate retaining its own distinct versions of each folding/visiting trait, blanket-implemented on all types that implement the respective trait in the type library, was also explored: however since this would necessitate making each `rustc_middle` trait a subtrait of the respective type library trait (so that such blanket implementations can delegate their generic methods), no benefit would be gained.
r? types
Introduce `-Zterminal-urls` to use OSC8 for error codes
Terminals supporting the OSC8 Hyperlink Extension can support inline anchors where the text is user defineable but clicking on it opens a browser to a specified URLs, just like `<a href="URL">` does in HTML.
https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
lintcheck: fix clap panic
clap 4.1.4 panics if `-` is used at the start of an argument:
```
$ cargo lintcheck
[…]
thread 'main' panicked at 'Argument recursive: long "--recursive" must not start with a `-`, that will be handled by the parser', /home/sam/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-4.1.4/src/builder/debug_asserts.rs:82:13
```
changelog: none
<!-- changelog_checked -->
Implement `deferred_projection_equality` for erica solver
Somewhat of a revival of #96912. When relating projections now emit an `AliasEq` obligation instead of attempting to determine equality of projections that may not be as normalized as possible (i.e. because of lazy norm, or just containing inference variables that prevent us from resolving an impl). Only do this when the new solver is enabled
Clap was updated in rust-lang/rust-clippy#10270, which broke the command
line of clippy_dev. This swaps out contains_id, which now returns always
true in the places it was used with get_flag.
Terminals supporting the OSC8 Hyperlink Extension can support inline
anchors where the text is user defineable but clicking on it opens a
browser to a specified URLs, just like `<a href="URL">` does in HTML.
https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
Make `[clippy::dump]` support trait items
Roses are red,
violets are blue,
trait items are rare,
`[clippy::dump]` is too
---
Let's just ignore the horrible poem... anyways. While working on Marker I noticed, that `[clippy::dump]` doesn't work on trait item (See [Playground](https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=e2d9791ffa2872e7c09a9dfbd470350c)). This simply adds support for that. `[clippy::dump]` doesn't have UI tests, to make it more resistant to changes in the AST. I tested it locally and the dump works after these changes.
---
changelog: none
Negate suggestions when needed in `bool_assert_comparison`
changelog: none assuming this gets into the same release as #10218Fixes#10291
r? `@dswij`
Thanks to `@black-puppydog` for spotting it early
fix(suspicious_to_owned): use span_suggestions to suggest both intents
fixes#10294
changelog: [`suspicious_to_owned`]: suggestions now produce valid Rust code
