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"""
Module containing Fortran2008 Critical_Construct rule R810
"""
from fparser.two.Fortran2003 import Execution_Part_Construct
from fparser.two.Fortran2008.critical_stmt_r811 import Critical_Stmt
from fparser.two.Fortran2008.end_critical_stmt_r812 import End_Critical_Stmt
from fparser.two.utils import BlockBase


class Critical_Construct(BlockBase):
    """
    Fortran 2008 Rule 810.

    critical-construct is critical-stmt
                            block
                            end-critical-stmt

    TODO: Should disallow RETURN (C809) and CYCLE or EXIT to outside block (C811)
    """

    subclass_names = []
    use_names = ["Critical_Stmt", "Execution_Part_Construct", "End_Critical_Stmt"]

    @staticmethod
    def match(reader):
        """
        Attempt to match the supplied content with this Rule.

        :param reader: the fortran file reader containing the line(s)
                      of code that we are trying to match
        :type reader: :py:class:`fparser.common.readfortran.FortranFileReader` \
            | :py:class:`fparser.common.readfortran.FortranStringReader`

        :returns: instance of class that has matched or `None` if no match.
        :rtype: :py:class:`fparser.two.utils.BlockBase` | NoneType

        """
        return BlockBase.match(
            Critical_Stmt,
            [Execution_Part_Construct],
            End_Critical_Stmt,
            reader,
            match_names=True,  # C810
            strict_match_names=True,  # C810
        )
