Source code for returns._generated.pointfree.bind_future
def _bind_future(function):
"""
Lifts ``Future`` function to be wrapped in other container.
In other words, it modifies the function's
signature from: ``a -> Future[b]``
to: ``Container[a] -> Container[b]``
This is how it should be used:
.. code:: python
>>> import anyio
>>> from returns.future import Future, FutureResult
>>> from returns.io import IOSuccess, IOFailure
>>> from returns.pointfree import bind_future
>>> def example(argument: int) -> Future[float]:
... return Future.from_value(argument / 2)
>>> async def success() -> FutureResult[float, int]:
... container = FutureResult.from_value(1)
... return await bind_future(example)(container)
>>> async def failure() -> FutureResult[float, int]:
... container = FutureResult.from_failure(1)
... return await bind_future(example)(container)
>>> assert anyio.run(success) == IOSuccess(0.5)
>>> assert anyio.run(failure) == IOFailure(1)
"""
return lambda container: container.bind_future(function)