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from gui.widgets.label import Label
from ql.ast.nodes.expressions.literals.undefined_literal import UndefinedNode
from ql.types.boolean import QLBoolean
from ql.types.type import QLType
class QLUndefined(QLType):
def __init__(self, *unused):
super(QLUndefined, self).__init__()
self.__value = None
@property
def value(self):
return self.__value
def __bool__(self):
return False
def __repr__(self):
return 'Undefined'
def __eq__(self, other):
if isinstance(other, QLUndefined):
return QLBoolean(self.value == other.value)
return QLBoolean(False)
def __ne__(self, other):
return QLBoolean(not self == other)
def get_json_value(self):
return self.value
@staticmethod
def get_literal_node(unused):
return UndefinedNode(None, QLUndefined, QLUndefined(None))
@staticmethod
def pyqt5_default_widget():
return Label('Undefined')
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