43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
# Copyright (c) PARRRATE T&V 2021. All rights reserved.
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from bu4.evaluation.constructs.eattachable import EAttachable
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from bu4.evaluation.constructs.edelayed import EDelayed
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from bu4.evaluation.constructs.evaluable import Evaluable
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from bu4.indexing.constructs.idelayed import IDelayed
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from bu4.indexing.constructs.indexed import Indexed
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from bu4.linking.constructs.linked import Linked
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from bu4.linking.evaluation.elvtype import elvtype
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from bu4.transform.states.aftertransform import AfterTransform
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from bu4.transform.states.transformfinished import TransformFinished
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from bu4.transform.states.transformstart import TransformStart
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from bu4.transform.states.transformstate import TransformState
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from bu4.transform.targets.atlambda import ATLambda
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__all__ = ('LDelayed',)
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class LDelayed(Linked):
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value: Linked
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def __init__(self, value: Linked):
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self.value = value
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self.future = self.value.future
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self.multifuture = self.future
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def attach(self, env: elvtype) -> Evaluable:
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return EDelayed(EAttachable(
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env,
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self.value
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))
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def index(self, promise: list[bytes]) -> TransformState[Indexed]:
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return AfterTransform(
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TransformStart(lambda: self.value.index(promise)),
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ATLambda(
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lambda value: TransformFinished(IDelayed(value))
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)
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)
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def __str__(self):
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return f'&{self.value}'
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