235fdfc57a
## 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
Vendored types for the stdlib
This crate vendors typeshed's stubs for the standard library. The vendored stubs can be found in crates/red_knot_vendored/vendor/typeshed. The file crates/red_knot_vendored/vendor/typeshed/source_commit.txt tells you the typeshed commit that our vendored stdlib stubs currently correspond to.
The typeshed stubs are updated every two weeks via an automated PR using the sync_typeshed.yaml workflow in the .github/workflows directory. This workflow can also be triggered at any time via workflow dispatch.