Map RPITIT's opaque type bounds back from projections to opaques #114267
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
This comment has been minimized.
This comment has been minimized.
rust-cloud-vms
bot
force-pushed
the
rpitit-opaque-bounds
branch
from
ca6885c to
6f5c51f
Compare
|
@bors r+ |
bors
added
S-waiting-on-bors
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Jul 31, 2023
…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#114111 (Improve test case for experimental API remove_matches) - rust-lang#114169 (refactor builtin unsize handling, extend comments) - rust-lang#114182 (clean up after 113312) - rust-lang#114193 (Update lexer emoji diagnostics to Unicode 15.0) - rust-lang#114200 (Detect trait upcasting through struct tail unsizing in new solver select) - rust-lang#114228 (Check lazy type aliases for well-formedness) - rust-lang#114267 (Map RPITIT's opaque type bounds back from projections to opaques) - rust-lang#114269 (Migrate GUI colors test to original CSS color format) - rust-lang#114286 (Add missing feature gate in multiple_supertrait_upcastable doc) r? `@ghost` `@rustbot` modify labels: rollup
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in 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Outdated suggestions cannot be applied.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.
An RPITIT in a program's AST is eventually translated into both a projection GAT and an opaque. The opaque is used for default trait methods, like:
The item bounds for both the projection and opaque are identical, and both have a projection self ty. This is mostly okay, since we can normalize this projection within the default trait method body to the opaque, but it does two things:
deduce_future_output_from_obligationsThis PR maps the opaque type bounds of the RPITIT's opaque back to the opaque's self type to avoid this quirk. Then we can fix the UI test for #108304 (1.) and also remove a bunch of match arms (2.).
Fixes #108304
r? @spastorino