'Never used directly by user. Invoke by UFuncMechanism.call().'

def __init__(self, typemap, args):

    self.typemap = typemap
    self.args = args
    nargs = len(self.args)
    self.argtypes = ([None] * nargs)
    self.scalarpos = []
    self.signature = None
    self.arrays = ([None] * nargs)
