#  Copyright (c) PARRRATE T&V 2021. All rights reserved.

from bu4.evaluation.av.evtype import evtype
from bu4.evaluation.av.lambdaev import LambdaEv
from bu4.evaluation.constructs.eattachable import EAttachable
from bu4.evaluation.constructs.evaluable import Evaluable
from bu4.evaluation.constructs.evalue import EValue
from bu4.indexing.constructs.indexed import Indexed

__all__ = ('EILambda',)


class EILambda(EValue):
    def __init__(self, ev: evtype, value: Indexed, *, memoize: bool):
        self.ev = ev
        self.value = value
        self.memoize = memoize

    def call(self, argument: Evaluable) -> Evaluable:
        return EAttachable(
            LambdaEv(self.ev, argument, memoize=self.memoize),
            self.value
        )

    def __str__(self):
        return f'(){self.value}'