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## Summary Adds a type-check-time Python API that allows us to create and manipulate types and to test various of their properties. For example, this can be used to write a Markdown test to make sure that `A & B` is a subtype of `A` and `B`, but not of an unrelated class `C` (something that requires quite a bit more code to do in Rust): ```py from knot_extensions import Intersection, is_subtype_of, static_assert class A: ... class B: ... type AB = Intersection[A, B] static_assert(is_subtype_of(AB, A)) static_assert(is_subtype_of(AB, B)) class C: ... static_assert(not is_subtype_of(AB, C)) ``` I think this functionality is also helpful for interactive debugging sessions, in order to query various properties of Red Knot's type system. Which is something that otherwise requires a custom Rust unit test, some boilerplate code and constant re-compilation. ## Test Plan - New Markdown tests - Tested the modified typeshed_sync workflow locally |
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