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"""
Module containing Fortran2008 Alloc_Opt rule R627
"""
from fparser.two.Fortran2003 import (
    Alloc_Opt as Alloc_Opt_2003,
    Stat_Variable,
    Errmsg_Variable,
    Source_Expr,
)


class Alloc_Opt(Alloc_Opt_2003):
    """
    Fortran2008 rule R627.

    .. code-block:: fortran

        alloc-opt is ERRMSG = errmsg-variable
                  or MOLD = source-expr
                  or SOURCE = source-expr
                  or STAT = stat-variable

    Extends the Fortran2003 version of this class by updating the keyword
    pairs (used in match) with support for MOLD.

    """

    _keyword_pairs = [
        ("STAT", Stat_Variable),
        ("ERRMSG", Errmsg_Variable),
        ("SOURCE", Source_Expr),
        ("MOLD", Source_Expr),
    ]
