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"""
.. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
"""
from ._checker import CheckerFactory, TypeCheckerBase, TypeCheckerDelegator
from ._common import isnan, isstring
class NanTypeCheckerStrictLevel0(TypeCheckerBase):
def is_instance(self):
return isnan(self._value)
def is_valid_after_convert(self, converted_value):
return isnan(converted_value)
class NanTypeCheckerStrictLevel1(NanTypeCheckerStrictLevel0):
def is_exclude_instance(self):
return isstring(self._value)
_factory = CheckerFactory(
checker_mapping={0: NanTypeCheckerStrictLevel0, 1: NanTypeCheckerStrictLevel1}
)
class NanTypeChecker(TypeCheckerDelegator):
def __init__(self, value, strict_level):
super().__init__(value=value, checker_factory=_factory, strict_level=strict_level)
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