Class PySequenceIterator

tests/test_sequences_and_iterators.cpp:505–517

    // are not covered by the much simpler py::make_iterator

    struct PySequenceIterator {
        PySequenceIterator(const Sequence &seq, py::object ref) : seq(seq), ref(ref) { }

        float next() {
            if (index == seq.size())
                throw py::stop_iteration();
            return seq[index++];
        }

        const Sequence &seq;
        py::object ref; // keep a reference
        size_t index = 0;
    };

    py::class_<PySequenceIterator>(seq, "Iterator")
        .def("__iter__", [](PySequenceIterator &it) -> PySequenceIterator& { return it; })