C++ In a Nutshell

Name

bidirectional_iterator_tag class — Tag for a bidirectional iterator

Synopsis

struct bidirectional_iterator_tag :
  public forward_iterator_tag {};

Use the bidirectional_iterator_tag class as the iterator category when declaring a new bidirectional iterator class. When writing a generic algorithm or similar function, you can use the iterator’s category to write specialized implementations for different kinds of iterators. See Example 13-19 (under the distance function template).

See Also

bidirectional_iterator_tag class, forward_iterator_tag class, input_iterator_tag class, iterator class template, output_iterator_tag class, random_access_iterator_tag class