ruff/crates/red_knot_python_semantic/resources/mdtest/call
David Peter 235fdfc57a
[red-knot] knot_extensions Python API (#15103)
## 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
2025-01-08 12:52:07 +01:00
..
callable_instance.md [red-knot] Statically known branches (#15019) 2024-12-21 11:33:10 +01:00
constructor.md [red-knot] Format mdtest Python snippets more concisely (#13905) 2024-10-24 11:09:31 +00:00
function.md [red-knot] knot_extensions Python API (#15103) 2025-01-08 12:52:07 +01:00
invalid_syntax.md [red-knot] add call checking (#15200) 2025-01-07 20:39:45 +00:00
union.md Display Union of Literals as a Literal (#14993) 2025-01-08 00:58:38 +00:00