Collaboration diagram for Iterator Tags:

Classes

struct std::bidirectional_iterator_tag
Bidirectional iterators support a superset of forward iterator operations. More...
struct std::forward_iterator_tag
Forward iterators support a superset of input iterator operations. More...
struct std::input_iterator_tag
Marking input iterators. More...
struct std::output_iterator_tag
Marking output iterators. More...
struct std::random_access_iterator_tag
Random-access iterators support a superset of bidirectional iterator operations. More...

Detailed Description

These are empty types, used to distinguish different iterators. The distinction is not made by what they contain, but simply by what they are. Different underlying algorithms can then be used based on the different operations supported by different iterator types.