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ruff/crates/red_knot_python_semantic/resources/mdtest/stubs/class.md
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[red-knot] Enforce specifying paths for mdtest code blocks in a separate preceding line (#15890) 
## Summary

Resolves #15695, rework of #15704.

This change modifies the Mdtests framework so that:

* Paths must now be specified in a separate preceding line:

	`````markdown
	`a.py`:

	```py
	x = 1
	```
	`````

If the path of a file conflicts with its `lang`, an error will be
thrown.

* Configs are no longer accepted. The pattern still take them into
account, however, to avoid "Unterminated code block" errors.
* Unnamed files are now assigned unique, `lang`-respecting paths
automatically.

Additionally, all legacy usages have been updated.

## Test Plan

Unit tests and Markdown tests.

---------

Co-authored-by: Carl Meyer <carl@astral.sh>
2025-02-04 08:27:17 +01:00

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Class definitions in stubs

Cyclical class definition

In type stubs, classes can reference themselves in their base class definitions. For example, in typeshed, we have class str(Sequence[str]): ....

class Foo[T]: ...

# TODO: actually is subscriptable
# error: [non-subscriptable]
class Bar(Foo[Bar]): ...

reveal_type(Bar)  # revealed: Literal[Bar]
reveal_type(Bar.__mro__)  # revealed: tuple[Literal[Bar], Unknown, Literal[object]]