022: data()

data() を定義します。

純粋に heap_ を返します。myvector では heap_ の指し先が nullptr である場合がありますが、data() ではそのことはケアしません。

template <typename T>
class myvector
{
...

    /**
     * @brief      Returns pointer to the underlying array serving as element storage.
     *             The pointer is such that range [data(), data() + size()) is always
     *             a valid range, even if the container is empty (data() is not dereferenceable
     *             in that case).
     * @return     Pointer to the underlying element storage. For non-empty containers,
     *             the returned pointer compares equal to the address of the first element.
     */
    pointer data(void) noexcept
    {
        return heap_;
    }

    /**
     * @brief      Returns pointer to the underlying array serving as element storage.
     *             The pointer is such that range [data(), data() + size()) is always
     *             a valid range, even if the container is empty (data() is not dereferenceable
     *             in that case).
     * @return     Const pointer to the underlying element storage. For non-empty containers,
     *             the returned pointer compares equal to the address of the first element.
     */
    const_pointer data(void) const noexcept
    {
        return heap_;
    }

    ...
};

data() はそれぞれ２種類ありますが、違いは const関数であるか、非const関数であるか、のみです。


全ソースコード： https://github.com/suomesta/myvector/tree/master/022