Source code for pathex.expressions.nary_operators.concatenation

from pathex.expressions.nary_operators.nary_operator import NAryOperator

__all__ = ['Concatenation']


class Concatenation(NAryOperator):
    """
    Examples:

    >>> from pathex.expressions.aliases import *

    >>> exp = U('ab') + C('xy')
    >>> assert exp.get_language() == exp.get_generator().get_language() == {'axy', 'bxy'}

    >>> assert {''.join(list(w)) for w in exp.get_eager_generator()} == {'axy', 'bxy'}

    >>> exp = 'a' + I('xy')
    >>> assert exp.get_language() == exp.get_generator().get_language() == set()

    >>> exp = I('xy') + 'a'
    >>> assert exp.get_language() == exp.get_generator().get_language() == set()

    >>> assert E.get_language() == E.get_generator().get_language() == {''}
    """