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#  Filename : logical_operators.py
#  Authors  : Fredo Durand, Stephane Grabli, Francois Sillion, Emmanuel Turquin 
#  Date     : 08/04/2005
#  Purpose  : Logical unary predicates (functors) for 1D elements

from freestyle import UnaryPredicate1D

class AndUP1D(UnaryPredicate1D):
    def __init__(self, pred1, pred2):
        UnaryPredicate1D.__init__(self)
        self.__pred1 = pred1
        self.__pred2 = pred2
    def __call__(self, inter):
        return self.__pred1(inter) and self.__pred2(inter)
    
class OrUP1D(UnaryPredicate1D):
    def __init__(self, pred1, pred2):
        UnaryPredicate1D.__init__(self)
        self.__pred1 = pred1
        self.__pred2 = pred2
    def __call__(self, inter):
        return self.__pred1(inter) or self.__pred2(inter)

class NotUP1D(UnaryPredicate1D):
    def __init__(self, pred):
        UnaryPredicate1D.__init__(self)
        self.__pred = pred
    def __call__(self, inter):
        return not self.__pred(inter)