from decimal import Decimal
from typing import TypeVar

from tudelft.utilities.immutablelist.ImmutableList import ImmutableList


E = TypeVar('E')
class ItemIterator:
    def __init__(self, l:ImmutableList[E]):
        # Team object reference
        self._l = l
        # member variable to keep track of current index
        self._index = Decimal(0)
    def __next__(self):
        '''Returns the next value from team object's lists '''
        if self._index >= self._l.size():
            # End of Iteration
            raise StopIteration
        val=self._l.get(self._index)
        self._index += Decimal(1)
        return val

class AbstractImmutableList(ImmutableList[E]):
    def __iter__(self):
        return ItemIterator(self)