34 lines
1.2 KiB
Python
34 lines
1.2 KiB
Python
# Copyright (c) PARRRATE T&V 2021. All rights reserved.
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from bu4.linking.states.afterlinking import AfterLinking
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from bu4.linking.states.linkingfinished import LinkingFinished
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from bu4.linking.states.linkingparsed import LinkingParsed
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from bu4.linking.states.linkingstate import LinkingState
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from bu4.linking.targets.alchain import ALChain
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from bu4.parsing.constructs.linked import Linked
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__all__ = ('prepare',)
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def _afterlinking_iteration(state: AfterLinking) -> LinkingState:
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if isinstance(state.state, LinkingFinished):
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state = state.target.given(state.state.linked)
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elif isinstance(state.state, AfterLinking):
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state.state, state.target = state.state.state, ALChain(state.state.target, state.target)
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elif isinstance(state.state, LinkingParsed):
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state.state = state.state.parsed.link(state.state.promise).link()
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else:
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raise TypeError
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return state
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def prepare(linked: Linked) -> Linked:
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state = linked.link()
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while True:
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if isinstance(state, LinkingFinished):
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return state.linked
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elif isinstance(state, AfterLinking):
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state = _afterlinking_iteration(state)
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else:
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raise TypeError
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