### - u -

- uncaught_exception() : std
- unexpected() : std
- uninitialized_copy() : std
- uninitialized_copy_n() : __gnu_cxx
- uninitialized_fill() : std
- uninitialized_fill_n() : std
- unique() : std
- unique_copy() : std::__parallel , std , std::__parallel , std , std::__parallel
- unique_copy_switch() : std::__parallel
- unitbuf() : std
- upper_bound() : std
- uppercase() : std
- use_facet() : std