Rollup of 6 pull requests
Successful merges:
- #105661 (implement the skeleton of the updated trait solver)
- #105853 (Make the pre-push script work on directories with spaces)
- #106043 (Move tests)
- #106048 (Run `tidy` in its own job in PR CI)
- #106055 (Check arg expressions properly on error in `confirm_builtin_call`)
- #106067 (A few metadata nits)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
implement the skeleton of the updated trait solver
cc ```@rust-lang/initiative-trait-system-refactor```
This is mostly following the architecture discussed in the types team meetup.
After discussing the desired changes for the trait solver, we encountered cyclic dependencies between them. Most notably between changing evaluate to be canonical and returning inference constraints. We cannot canonicalize evaluate without returning inference constraints due to coinductive cycles. However, caching inference constraints also relies on canonicalization. Implementing both of these changes at once in-place is not feasible.
This somewhat closely mirrors the current `evaluate` implementation with the following notable differences:
- it moves `project` into the core solver, allowing us to correctly deal with coinductive projections (will be required for implied bounds, perfect derive)
- it changes trait solver overflow to be non-fatal (required to backcompat breakage from changes to the iteration order of nested goals, deferred projection equality, generally very useful)
- it returns inference constraints and canonicalizes inputs and outputs (required for a lot things, most notably merging fulfill and evaluate, and deferred projection equality)
- it is implemented to work with lazy normalization
A lot of things aren't yet implemented, but the remaining FIXMEs should all be fairly self-contained and parallelizable. If the architecture looks correct and is what we want here, I would like to quickly merge this and then split the work.
r? ```@compiler-errors``` / ```@rust-lang/types``` :3
Retag as FnEntry on `drop_in_place`
This commit changes the mir drop shim to always retag its argument as if it were a `&mut`.
cc rust-lang/unsafe-code-guidelines#373
Clarify that raw retags are not permitted in Mir
Not sure when this changed, but documentation and the validator needed to be updated. This also removes raw retags from custom mir.
cc rust-lang/miri#2735
r? `@RalfJung`
Avoid going through the happy path in case of non-fn builtin calls
No functional change, just doing an early return. The removed comment is not applicable anymore, not every node needs type bindings in the error case. At best this would have been needed to avoid ICEs, but afaict this can't happen anymore today, as we do fallible checks.
Improve syntax of `newtype_index`
This makes it more like proper Rust and also makes the implementation a lot simpler.
Mostly just turns weird flags in the body into proper attributes.
It should probably also be converted to an attribute macro instead of function-like, but that can be done in a future PR.
Revert #103880 "Use non-ascribed type as field's type in mir"
This PR prepares a revert for #103880 to fix#105809, #105881, #105886 and others (like the duplicates of the first one), in case an actual fix can't get done today.
I've also added the MCVE from #105809. There is no MCVE for the #105881 and #105886 ICEs yet however, so there are no tests for them here, although we'll need one before relanding the original changes.
Were this PR to land, it would also reopen#96514 as it was fixed by the original PR.
Opening as draft to allow time for a possible fix.
r? `@jackh726`
Remove the `..` from the body, only a few invocations used it and it's
inconsistent with rust syntax.
Use `;` instead of `,` between consts. As the Rust syntax gods inteded.
This removes the `custom` format functionality as its only user was
trivially migrated to using a normal format.
If a new use case for a custom formatting impl pops up, you can add it
back.
always use `anonymize_bound_vars`
Unless this is perf-sensitive, it's probably best to always use one anonymize function that does the right thing for all bound vars.
r? types
