Phase 2 of async/await #1946
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Phase 2 of async/await #1946
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This was referenced Jul 27, 2016
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gvanrossum
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| @abstractmethod | ||
| def __await__(self) -> Generator[Any, Any, T]: pass | ||
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| class AwaitableGenerator(Generator[T, U, V], Awaitable[V], Generic[T, U, V, S]): |
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Why is there an AwaitableGenerator in the test data typing stub when there isn't one in the real typing module?
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Because this stub (despite its extension) is actually a stub. It matches the real typing.pyi, not any real typing.py.
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Oh okay. That makes sense.
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mypy/checker.py
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| self.lookup_qualified('typing.AwaitableGenerator') | ||
| except KeyError: | ||
| return False | ||
| agt = self.named_generic_type('typing.AwaitableGenerator', |
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Wouldn't it be simpler to just look at the fullname instead, like we do elsewhere?
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August 3, 2016 16:28
Both crawl.py and crawl2.py pass cleanly now!
mypy/checker.py
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| else: | ||
| # `return_type` is a supertype of Generator, so callers won't be able to send it | ||
| # values. | ||
| # Supertype of Generator (Iterator, Iterable, object), tc is None. |
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I think the bit of motivation is worthwhile here too.
added 15 commits
August 3, 2016 16:32
Mostly streamlined the comments, but also decided that return in a generator not explicitly declared as returning Any or Generator should be None.
NOTE: the Matrix test is currently failing.
Upgrade AwaitableGenerator to four parameters -- the last one preserves the original type, which we sometimes need.
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August 3, 2016 16:32
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This PR adds support for decorating either generators or
async deffunctions with@types.coroutineor@asyncio.coroutine. This will fix #1453.