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

from typing import TypeVar, Generic

from bu4.evaluation.constructs.attachable import Attachable
from bu4.evaluation.constructs.evaluable import Evaluable

__all__ = ('EAttachable',)

T = TypeVar('T')


class EAttachable(Evaluable, Generic[T]):
    def __init__(self, t: T, attachable: Attachable[T]):
        self.t = t
        self.attachable = attachable

    def next(self) -> Evaluable:
        return self.attachable.attach(self.t)

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