Here is a list of all documented namespace functions with links to the namespaces they belong to:

### - o -

- oct() : std
- operator!=() : __gnu_cxx, std::chrono, std, std::rel_ops, std::tr2
- operator""h() : std::literals::chrono_literals
- operator""min() : std::literals::chrono_literals
- operator""ms() : std::literals::chrono_literals
- operator""ns() : std::literals::chrono_literals
- operator""s() : std::literals::chrono_literals
- operator""us() : std::literals::chrono_literals
- operator%() : std::chrono
- operator&() : std, std::regex_constants, std::tr2
- operator&=() : std::regex_constants
- operator*() : std::chrono, std
- operator+() : __gnu_cxx, std::chrono, std
- operator-() : std::chrono, std, std::tr2
- operator/() : std::chrono, std
- operator<() : __gnu_cxx, std::chrono, std
- operator<<() : std::__detail, std, std::tr2
- operator<=() : __gnu_cxx, std::__debug, std::chrono, std, std::rel_ops, std::tr2
- operator==() : __gnu_cxx, std
- operator>() : __gnu_cxx, std::__debug, std::chrono, std, std::rel_ops, std::tr2
- operator>=() : __gnu_cxx, std::__debug, std::chrono, std, std::rel_ops, std::tr2
- operator>>() : std::__detail, std, std::tr2
- operator^() : std, std::regex_constants, std::tr2
- operator^=() : std::regex_constants
- operator|() : std, std::regex_constants, std::tr2
- operator|=() : std::regex_constants
- operator~() : std::regex_constants