Remove special-casing around AliasKind::Opaque when structurally resolving in new solver
#119817
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
rustbot
added
S-waiting-on-review
|
Some changes occurred to the core trait solver cc @rust-lang/initiative-trait-system-refactor |
compiler-errors
commented
Jan 10, 2024
| { | ||
| return Some(ty); | ||
| } | ||
| if let DefineOpaqueTypes::No = define_opaque_types |
There was a problem hiding this comment.
This is copied from #118915, since otherwise Opaque alias-eq ?0 won't reveal the opaque in Reveal::All mode.
The important part is the && let Reveal::UserFacing = param_env.reveal() line, since in reveal-all mode, we don't care if opaques are local or not, we always want to reveal them.
lcnr
reviewed
Jan 10, 2024
| @@ -23,7 +23,7 @@ impl<'tcx> StructurallyNormalizeExt<'tcx> for At<'_, 'tcx> { | |||
|
|
|||
| if self.infcx.next_trait_solver() { | |||
| // FIXME(-Znext-solver): Should we resolve opaques here? | |||
lcnr
added
S-blocked
rust-cloud-vms
bot
force-pushed
the
normalize-opaques
branch
from
7b4d04e to
68c2f11
Compare
|
@bors r+ rollup (new solver) |
bors
added
S-waiting-on-bors
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Jan 12, 2024
…llaumeGomez Rollup of 6 pull requests Successful merges: - rust-lang#119817 (Remove special-casing around `AliasKind::Opaque` when structurally resolving in new solver) - rust-lang#119819 (Check rust lints when an unknown lint is detected) - rust-lang#119872 (Give me a way to emit all the delayed bugs as errors (add `-Zeagerly-emit-delayed-bugs`)) - rust-lang#119877 (Add more information to `visit_projection_elem`) - rust-lang#119884 (Rename `--env` option flag to `--env-set`) - rust-lang#119885 (Revert rust-lang#113923) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Jan 12, 2024
Rollup merge of rust-lang#119817 - compiler-errors:normalize-opaques, r=lcnr Remove special-casing around `AliasKind::Opaque` when structurally resolving in new solver This fixes a few inconsistencies around where we don't eagerly resolve opaques to their (locally-defined) hidden types in the new solver. It essentially allows this code to work: ```rust fn main() { type Tait = impl Sized; struct S { i: i32, } let x: Tait = S { i: 0 }; println!("{}", x.i); } ``` Since `Tait` is defined in `main`, we are able to poke through the type of `x` with deref. r? lcnr
# for free
to join this conversation on GitHub.
Already have an account?
# to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This fixes a few inconsistencies around where we don't eagerly resolve opaques to their (locally-defined) hidden types in the new solver. It essentially allows this code to work:
Since
Taitis defined inmain, we are able to poke through the type ofxwith deref.r? lcnr