constexpr
size_type
find_last_not_of(
    charT c,
    size_type pos = npos) const noexcept;

constexpr
size_type
find_last_not_of(
    std::basic_string_view<charT, traits> s,
    size_type pos = npos) const noexcept;

constexpr
size_type
find_last_not_of(
    charT const* s,
    size_type pos = npos) const;

constexpr
size_type
find_last_not_of(
    charT const* s,
    size_type pos,
    size_type n) const;