"""Service-side typing surface."""
from collections.abc import AsyncGenerator, Callable
from typing import TYPE_CHECKING, Protocol, runtime_checkable
from typing_extensions import TypeAlias, TypeVar
if TYPE_CHECKING:
from sqlalchemy.ext.asyncio import AsyncSession
__all__ = ("ServiceProvider", "ServiceWithSession")
T = TypeVar("T")
ServiceProvider: TypeAlias = Callable[["AsyncSession"], AsyncGenerator[T, None]]
"""Callable that yields a service instance for a session."""
[docs]
@runtime_checkable
class ServiceWithSession(Protocol):
"""Structural protocol for services constructible with ``session=``."""
[docs]
def __init__(self, *, session: "AsyncSession") -> None: ...
