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## Class template date_itr_base

boost::date_time::date_itr_base — Base date iterator type.

## Synopsis

    // In header: <boost/date_time/date_iterator.hpp>

    template<typename date_type>
    class date_itr_base {
    public:
      // types
      typedef date_type::duration_type duration_type;
      typedef date_type                value_type;
      typedef std::input_iterator_tag  iterator_category;

      // construct/copy/destruct
      date_itr_base(date_type);
      ~date_itr_base();

      // public member functions
      date_itr_base & operator++();
      date_itr_base & operator--();
      virtual duration_type get_offset(const date_type &) const = 0;
      virtual duration_type get_neg_offset(const date_type &) const = 0;
      date_type operator *();
      date_type * operator->();
      bool operator<(const date_type &);
      bool operator<=(const date_type &);
      bool operator>(const date_type &);
      bool operator>=(const date_type &);
      bool operator==(const date_type &);
      bool operator!=(const date_type &);
    };

## Description

This class provides the skeleton for the creation of iterators. New and interesting interators can be created by plugging in a new function that derives the next value from the current state. generation of various types of -based information.

Template Parameters

date_type

The date_type is a concrete date_type. The date_type must define a duration_type and a calendar_type.

### `date_itr_base` public construct/copy/destruct

1.     date_itr_base(date_type d);

2.     ~date_itr_base();

### `date_itr_base` public member functions

1.     date_itr_base & operator++();

2.     date_itr_base & operator--();

3.     virtual duration_type get_offset(const date_type & current) const = 0;

4.     virtual duration_type get_neg_offset(const date_type & current) const = 0;

5.     date_type operator *();

6.     date_type * operator->();

7.     bool operator<(const date_type & d);

8.     bool operator<=(const date_type & d);

9.     bool operator>(const date_type & d);

10.     bool operator>=(const date_type & d);

11.     bool operator==(const date_type & d);

12.     bool operator!=(const date_type & d);