Method find_last_of

include/boost/json/string.hpp:1939–1945

Find the last character present in the specified string. Search from `pos` backwards for the first character in this string that is equal to any of the characters of `sv`. If `pos` is equal to @ref npos (the default), search from the last character. @par Complexity Linear in @ref size() `+ sv.size()`. @par Exception Safety No-throw guarant

        @param pos The index to start searching at.
    */
    std::size_t
    find_last_of(
        string_view sv,
        std::size_t pos = npos) const noexcept
    {
        return subview().find_last_of(sv, pos);
    }

    /** Find the last character missing from the specified string.