use `LocalDefId` instead of `HirId` in trait resolution to simplify the obligation clause resolution
This commit introduces a refactoring suggested by `@lcnr` to simplify the obligation clause resolution.
This is just the first PR that introduces a type of refactoring, but others PRs will follow this to introduce name changing to change from the variable name from `body_id` to something else.
Fixes https://github.com/rust-lang/rust/issues/104827
Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
`@rustbot` r? `@lcnr`
use LocalDefId instead of HirId in trait resolution to simplify
the obligation clause resolution
Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Implement some more new solver candidates and fix some bugs
First, fix some bugs:
1. `IndexVec::drain_enumerated(a..b)` does not give us an iterator of index keys + items enumerated from `a..b`, but from `0..(b-a)`... That caused a bug. See first commit for the fix.
2. Implement the `_: Trait` ambiguity hack. I put it in assemble, let me know if it should live elsewhere. This is important, since we otherwise consider `_: Sized` to have no solutions, and nothing passes!
3. Swap `Ambiguity` and `Unimplemented` cases for the new solver. Sorry for accidentally swapping them 😄
4. Check GATs' own predicates during projection confirmation.
Then implement a few builtin traits:
5. Implement `PointerSized`. Pretty independent.
6. Implement `Fn` family of traits for fnptr, fndef, and closures. Closures are currently broken because `FulfillCtxt::relationships` is intentionally left unimplemented. See comment in the test.
r? ```@lcnr```
Rollup of 8 pull requests
Successful merges:
- #106783 (Recover labels written as identifiers)
- #106973 (Don't treat closures from other crates as local)
- #106979 (Document how to get the type of a default associated type)
- #107053 (signal update string representation for haiku.)
- #107058 (Recognise double-equals homoglyph)
- #107067 (Custom MIR: Support storage statements)
- #107076 (Added const-generic ui test case for issue #106419)
- #107091 (Fix broken format strings in `infer.ftl`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Don't treat closures from other crates as local
fixes#104817
r? `@lcnr`
Specialization can prefer an impl for an opaque type over a blanket impls that also matches. If the blanket impl only applies if an auto-trait applies, we look at the hidden type of the opaque type to see if that implements the auto trait. The hidden type can be a closure or generator, and thus we will end up seeing these types in coherence and have to handle them properly.
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 (https://github.com/rust-lang/rust/pull/102697#issuecomment-1385705202), so stop using them in compiler to make the removal PR later smaller.
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.
Switch to `EarlyBinder` for `item_bounds` query
Part of the work to finish #105779 (also see https://github.com/rust-lang/types-team/issues/78).
Several queries `X` have a `bound_X` variant that wraps the output in `EarlyBinder`. This adds `EarlyBinder` to the return type of the `item_bounds` query and removes `bound_item_bounds`.
r? `@lcnr`
new trait solver: rebase impl substs for gats correctly
you might've caught this while working on projection code, if so then you can close this pr
r? `@lcnr`
Rework some `predicates_of`/`{Generic,Instantiated}Predicates` code
1. Make `instantiate_own` return an iterator, since it's a bit more efficient and easier to work with
2. Remove `bound_{explicit,}_predicates_of` -- these `bound_` methods in particular were a bit awkward to work with since `ty::GenericPredicates` *already* acts kinda like an `EarlyBinder` with its own `instantiate_*` methods, and had only a few call sites anyways.
3. Implement `IntoIterator` for `InstantiatedPredicates`, since it's *very* commonly being `zip`'d together.
Implement some FIXME methods in the new trait solver
Implement just enough of the solver's response logic to make it not ICE.
Also, fix a bug with `no_bound_vars` call failing due to canonical bound vars.
r? `@lcnr`
Consolidate two almost duplicated fn info extraction routines
Moves `extract_callable_info` up to trait selection, because it was being (almost) duplicated fully there for similar diagnostic purposes. This also generalizes the diagnostics we can give slightly (see UI test).
Rollup of 8 pull requests
Successful merges:
- #105526 (libcore: make result of iter::from_generator Clone)
- #106563 (Fix `unused_braces` on generic const expr macro call)
- #106661 (Stop probing for statx unless necessary)
- #106820 (Deprioritize fulfillment errors that come from expansions.)
- #106828 (rustdoc: remove `docblock` class from notable trait popover)
- #106849 (Allocate one less vec while parsing arrays)
- #106855 (rustdoc: few small cleanups)
- #106860 (Remove various double spaces in the libraries.)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Switch to `EarlyBinder` for `const_param_default` and `impl_trait_ref` queries
Part of the work to close#105779 and implement https://github.com/rust-lang/types-team/issues/78.
Several queries `X` have a `bound_X` variant that wraps the output in `EarlyBinder`. This PR adds `EarlyBinder` to the return type of `const_param_default` and `impl_trait_ref`, and removes their `bound_X` variants.
r? `@lcnr`
I encountered an instance where an `FnPtr` implemented a trait, but I was passing an `FnDef`. To
the end user, there is really no way to differentiate each of them, but it is necessary to cast
to the generic function in order to compile. It is thus useful to suggest `as` in the help note,
(even if the Fn output implements the trait).
Rename `Ty::is_ty_infer` -> `Ty::is_ty_or_numeric_infer`
Makes sure people are aware that they may have a type variable *or* an int/float variable.
r? `@oli-obk` https://github.com/rust-lang/rust/pull/106322#issuecomment-1376913539 but I could instead implement your solution, let me know.
(This will conflict with #106322 for now, ignore that 😄)
Handle inference variables in `CollectAllMismatches` correctly
1. Fix#106240
2. Treat int/float type variables correctly (see `src/test/ui/iterators/invalid-iterator-chain-with-int-infer.rs`), so we can point out things like "`Iterator::Item` changed to `{integer}` here"
Move autoderef to `rustc_hir_analysis`
Not sure if this is a change we actually want, but autoderef really is only (functionally) used by `rustc_hir_analysis` and `rustc_hir_typeck`, so it probably should live there.
Instead, implement a separate autoderef helper in `TypeErrCtxt` for the one use-case that goes against the ordering of the crate graph..
Clean up `OnUnimplementedFormatString::verify`
Lift the always-allowed symbols to a static array and replace a `match iter().find(...)` with `iter().any(...)`
Prefer non-`[type error]` candidates during selection
Fixes#102130Fixes#106351
r? types
note: Alternatively we could filter out error where-clauses during param-env construction? But we still need to filter out impls with errors during `match_impl`, I think.
