ruff/crates/red_knot_python_semantic/resources/mdtest/with/async.md

Async with statements

Basic async with statement

The type of the target variable in a with statement should be the return type from the context manager's __aenter__ method. However, async with statements aren't supported yet. This test asserts that it doesn't emit any context manager-related errors.

class Target: ...

class Manager:
    async def __aenter__(self) -> Target:
        return Target()

    async def __aexit__(self, exc_type, exc_value, traceback): ...

async def test():
    async with Manager() as f:
        reveal_type(f)  # revealed: @Todo(async `with` statement)