thrust::forward_device_iterator_tag

struct forward_device_iterator_tag : public detail::iterator_category_with_system_and_traversal<::cuda::std::forward_iterator_tag, device_system_tag, forward_traversal_tag>

forward_device_iterator_tag is an empty class: it has no member functions, member variables, or nested types. It is used solely as a “tag”: a representation of the Forward Device Iterator concept within the C++ type system.

See also

https://en.cppreference.com/w/cpp/iterator/iterator_tags iterator_traits, input_device_iterator_tag, output_device_iterator_tag, bidirectional_device_iterator_tag, random_access_device_iterator_tag, input_host_iterator_tag, output_host_iterator_tag, forward_host_iterator_tag, bidirectional_host_iterator_tag, random_access_host_iterator_tag