Method sentinel

include/pybind11/pytypes.h:1583–1583

\rst The value which marks the end of the iteration. ``it == iterator::sentinel()`` is equivalent to catching ``StopIteration`` in Python. .. code-block:: cpp void foo(py::iterator it) { while (it != py::iterator::sentinel()) { // use `*it` ++it; } } \endrst */

             }
    \endrst */
    static iterator sentinel() { return {}; }

    friend bool operator==(const iterator &a, const iterator &b) { return a->ptr() == b->ptr(); }
    friend bool operator!=(const iterator &a, const iterator &b) { return a->ptr() != b->ptr(); }