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17 lines
554 B
Python
17 lines
554 B
Python
from __future__ import annotations
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from typing import Any, Callable, Generic, TypeVar
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from .applicative import Applicative
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from .functor import Functor
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T = TypeVar("T")
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S = TypeVar("S")
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class Monad(Applicative[T]):
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# FIXME: Callable return type set to Any, as the proper value
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# (Monad[S]) is reported as incompatible with subclass
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# implementations due to a flaw in mypy:
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# https://github.com/python/mypy/issues/1317
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def bind(self, function: Callable[[T], Any]) -> Monad[S]: # pragma: no cover
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raise NotImplementedError
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