Method get_buffer_info

tests/test_buffers.cpp:315–318

        int32_t value = 0;

        py::buffer_info get_buffer_info() {
            return py::buffer_info(
                &value, sizeof(value), py::format_descriptor<int32_t>::format(), 1);
        }
    };
    py::class_<Buffer>(m, "Buffer", py::buffer_protocol())
        .def(py::init<>())