29 lines
975 B
Python
29 lines
975 B
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.evaluable import Evaluable
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from bu4.evaluation.constructs.etraceable import ETraceable
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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.linking.evaluation.lambdaelv import LambdaElv
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__all__ = ('ELLambda',)
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class ELLambda(ETraceable):
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def __init__(self, env: elvtype, name: bytes, value: Linked):
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self.env = env
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self.name = name
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self.value = value
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self.used = name in value.future
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self.memoize = name in value.multifuture
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def call(self, argument: Evaluable) -> Evaluable:
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return EAttachable(
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LambdaElv(self.env, self.name, argument, memoize=self.memoize) if self.used else self.env,
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self.value
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)
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def __str__(self):
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return f'({self.name.decode()}){self.value}'
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