and_then and_then and_then and_then conjunction disjunction disjunction disjunction disjunction disjunction disjunction disjunction disjunction emplace emplace has_value map map map map map_or map_or map_or map_or map_or_else map_or_else map_or_else map_or_else operator bool operator* operator* operator* operator* operator-> operator-> operator= operator= operator= operator= operator= operator= optional optional optional optional optional optional optional optional optional optional optional optional or_else or_else or_else or_else or_else or_else or_else or_else reset swap take take take take value value value value value_or value_or ~optional

swap() template<class T> __thrust_exec_check_disable__ __host__ __device__ void thrust::optional< T >::swap ( optional< T > &  rhs ) noexcept Swaps this optional with the other. If neither optionals have a value, nothing happens. If both have a value, the values are swapped. If one has a value, it is moved to the other and the movee is left valueless. References thrust::addressof(), thrust::optional< T >::has_value(), and thrust::swap().