'Generate pure input variables to a specialization,
i.e. variables that aren\'t used to return a value.'

def _get_incallvars(self, intypes, c):

    incallvars = []
    for (n, intype) in enumerate(intypes):
        var = self.invars[n]
        if (c and (intype == 'double    complex')):
            var = npy_cdouble_from_double_complex(var)
        incallvars.append(var)
    return incallvars
