ruff/crates/ty_python_semantic/resources
Carl Meyer 2467c4352e
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[ty] propagate visitors and constraints through has_relation_in_invariant_position (#20259)
## Summary

The sub-checks for assignability and subtyping of materializations
performed in `has_relation_in_invariant_position` and
`is_subtype_in_invariant_position` need to propagate the
`HasRelationToVisitor`, or we can stack overflow.

A side effect of this change is that we also propagate the
`ConstraintSet` through, rather than using `C::from_bool`, which I think
may also become important for correctness in cases involving type
variables (though it isn't testable yet, since we aren't yet actually
creating constraints other than always-true and always-false.)

## Test Plan

Added mdtest (derived from code found in pydantic) which
stack-overflowed before this PR.

With this change incorporated, pydantic now checks successfully on my
draft PR for PEP 613 TypeAlias support.
2025-09-06 00:17:17 +00:00
..
corpus [ty] fix deferred name loading in PEP695 generic classes/functions (#19888) 2025-08-13 15:51:59 -07:00
mdtest [ty] propagate visitors and constraints through has_relation_in_invariant_position (#20259) 2025-09-06 00:17:17 +00:00
primer [ty] Update mypy_primer, add egglog-python project (#20078) 2025-09-05 14:17:07 +02:00
README.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00

Markdown files within the mdtest/ subdirectory are tests of type inference and type checking; executed by the tests/mdtest.rs integration test.

See crates/ty_test/README.md for documentation of this test format.