Method rfind

include/boost/json/string.hpp:1830–1836

Find the last occurrence of a string within the string. @li **(1)** searches for the last substring equal to `sv`. @li **(2)** searches for the last occurrence of `ch`. Both functions search for substrings fully contained within `[begin(), begin() + pos)`. @par Complexity Linear. @return Index of the first character of the found substring

        @{
    */
    std::size_t
    rfind(
        string_view sv,
        std::size_t pos = npos) const noexcept
    {
        return subview().rfind(sv, pos);
    }

    /** Overload