Function operator<

src/fl/stl/flat_map.h:525–529

template <typename Key, typename Value, typename Less>
bool operator<(const flat_map<Key, Value, Less>& lhs,
               const flat_map<Key, Value, Less>& rhs) FL_NOEXCEPT {
    return fl::lexicographical_compare(lhs.begin(), lhs.end(),
                                       rhs.begin(), rhs.end());
}

template <typename Key, typename Value, typename Less>
bool operator<=(const flat_map<Key, Value, Less>& lhs,