src/third_party/libc++/trunk/test/strings/basic.string/input_iterator.h

   1 #ifndef INPUT_ITERATOR_H
   2 #define INPUT_ITERATOR_H
   3
   4 #include <iterator>
   5
   6 template <class It>
   7 class input_iterator
   8 {
   9     It it_;
  10 public:
  11     typedef typename std::input_iterator_tag                   iterator_category;
  12     typedef typename std::iterator_traits<It>::value_type      value_type;
  13     typedef typename std::iterator_traits<It>::difference_type difference_type;
  14     typedef It                                                 pointer;
  15     typedef typename std::iterator_traits<It>::reference       reference;
  16
  17     input_iterator() : it_() {}
  18     explicit input_iterator(It it) : it_(it) {}
  19
  20     reference operator*() const {return *it_;}
  21     pointer operator->() const {return it_;}
  22
  23     input_iterator& operator++() {++it_; return *this;}
  24     input_iterator operator++(int) {input_iterator tmp(*this); ++(*this); return tmp;}
  25
  26     friend bool operator==(const input_iterator& x, const input_iterator& y)
  27         {return x.it_ == y.it_;}
  28     friend bool operator!=(const input_iterator& x, const input_iterator& y)
  29         {return !(x == y);}
  30 };
  31
  32 #endif  // INPUT_ITERATOR_H