// Extract an object x of the Target type from the first Python
// argument, and invoke get_start(x)/get_finish(x) to produce
// iterators, which are used to construct a new iterator_range<>
// object that gets wrapped into a Python iterator.
iterator_range<NextPolicies,Iterator>
operator()(back_reference<Target&> x) const
{
// Make sure the Python class is instantiated.
detail::demand_iterator_class("iterator", (Iterator*)0, NextPolicies());
return iterator_range<NextPolicies,Iterator>(
x.source()
, m_get_start(x.get())
, m_get_finish(x.get())
);
}
// prove that back_references get initialized with the right PyObject*
object y_identity(back_reference<Y const&> y)
{
return y.source();
}