Class tuple

include/pybind11/pytypes.h:2169–2189

};

class tuple : public object {
public:
    PYBIND11_OBJECT_CVT(tuple, object, PyTuple_Check, PySequence_Tuple)
    template <typename SzType = ssize_t,
              detail::enable_if_t<std::is_integral<SzType>::value, int> = 0>
    // Some compilers generate link errors when using `const SzType &` here:
    explicit tuple(SzType size = 0) : object(PyTuple_New(ssize_t_cast(size)), stolen_t{}) {
        if (!m_ptr) {
            pybind11_fail("Could not allocate tuple object!");
        }
    }
    size_t size() const { return static_cast<size_t>(PyTuple_Size(m_ptr)); }
    bool empty() const { return size() == 0; }
    detail::tuple_accessor operator[](size_t index) const { return {*this, index}; }
    template <typename T, detail::enable_if_t<detail::is_pyobject<T>::value, int> = 0>
    detail::item_accessor operator[](T &&o) const {
        return object::operator[](std::forward<T>(o));
    }
    detail::tuple_iterator begin() const { return {*this, 0}; }
    detail::tuple_iterator end() const { return {*this, PyTuple_GET_SIZE(m_ptr)}; }
};

// We need to put this into a separate function because the Intel compiler
// fails to compile enable_if_t<all_of<is_keyword_or_ds<Args>...>::value> part below