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# License: BSD 3 clause
"""Helper to load LossFunction from sgd_fast.pyx to sag_fast.pyx"""

cdef class LossFunction:
    cdef double loss(self, double p, double y) nogil
    cdef double dloss(self, double p, double y) nogil


cdef class Regression(LossFunction):
    cdef double loss(self, double p, double y) nogil
    cdef double dloss(self, double p, double y) nogil


cdef class Classification(LossFunction):
    cdef double loss(self, double p, double y) nogil
    cdef double dloss(self, double p, double y) nogil


cdef class Log(Classification):
    cdef double loss(self, double p, double y) nogil
    cdef double dloss(self, double p, double y) nogil


cdef class SquaredLoss(Regression):
    cdef double loss(self, double p, double y) nogil
    cdef double dloss(self, double p, double y) nogil