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"""
Module containing Fortran2008 Deferred_Coshape_Spec rule R510
"""
from fparser.two.utils import SeparatorBase


class Deferred_Coshape_Spec(SeparatorBase):  # R510
    """
    Fortran 2008 rule R510
    deferred-coshape-spec is :

    """

    subclass_names = []

    @staticmethod
    def match(string):
        """
        Implements the matching for deferred coarray shape specification.

        :param str string: the string to match as deferred shape.

        :return: `None` if there is no match, otherwise a 2-tuple \
                 containing `None`.
        :rtype: `NoneType` or (`None`, `None`)

        """
        if string == ":":
            return (None, None)
        return None
