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12 lines
295 B
Python
12 lines
295 B
Python
from __future__ import annotations
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from typing import Any, Callable, Generic, TypeVar
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T = TypeVar("T")
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S = TypeVar("S")
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class Functor(Generic[T]):
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def map(self, function: Callable[[T], S]) -> Functor[S]: # pragma: no cover
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raise NotImplementedError
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__mul__ = __rmul__ = map
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