37 lines
1014 B
Python
37 lines
1014 B
Python
# Copyright (c) PARRRATE T&V 2021. All rights reserved.
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from bu4.evaluation.av.envtype import envtype
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from bu4.evaluation.constructs.evaluable import Evaluable
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from bu4.linking.states.linkingfinished import LinkingFinished
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from bu4.linking.states.linkingstate import LinkingState
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from bu4.parsing.constructs.linked import Linked, Parsed
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__all__ = ('PName',)
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class LName(Linked):
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def __init__(self, promise: set[bytes], name: bytes):
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assert name in promise, f'undefined: {name}'
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self.name = name
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self.future = {name}
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def link(self) -> LinkingState:
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return LinkingFinished(self)
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def evaluable(self, env: envtype) -> Evaluable:
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return env[self.name]
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def __str__(self):
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return f'[{self.name.decode()}]'
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def unlink(self) -> Parsed:
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return PName(self.name)
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class PName(Parsed):
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def __init__(self, name: bytes):
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self.name = name
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def link(self, promise: set[bytes]) -> Linked:
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return LName(promise, self.name)
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