Class unchecked_mutable_reference

include/pybind11/numpy.h:733–766

template <typename T, ssize_t Dims>
class unchecked_mutable_reference : public unchecked_reference<T, Dims> {
    friend class pybind11::array;
    using ConstBase = unchecked_reference<T, Dims>;
    using ConstBase::ConstBase;
    using ConstBase::Dynamic;

public:
    // Bring in const-qualified versions from base class
    using ConstBase::operator();
    using ConstBase::operator[];

    /// Mutable, unchecked access to data at the given indices.
    template <typename... Ix>
    T &operator()(Ix... index) {
        static_assert(ssize_t{sizeof...(Ix)} == Dims || Dynamic,
                      "Invalid number of indices for unchecked array reference");
        return const_cast<T &>(ConstBase::operator()(index...));
    }
    /**
     * Mutable, unchecked access data at the given index; this operator only participates if the
     * reference is to a 1-dimensional array (or has runtime dimensions).  When present, this is
     * exactly equivalent to `obj(index)`.
     */
    template <ssize_t D = Dims, typename = enable_if_t<D == 1 || Dynamic>>
    T &operator[](ssize_t index) {
        return operator()(index);
    }

    /// Mutable pointer access to the data at the given indices.
    template <typename... Ix>
    T *mutable_data(Ix... ix) {
        return &operator()(ssize_t(ix)...);
    }
};

template <typename T, ssize_t Dim>
struct type_caster<unchecked_reference<T, Dim>> {