Chris@16: //  (C) Copyright Jeremy Siek 1999.
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See
Chris@16: //  accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_INT_ITERATOR_H
Chris@16: #define BOOST_INT_ITERATOR_H
Chris@16: 
Chris@16: #include <boost/iterator.hpp>
Chris@16: #if !defined BOOST_MSVC
Chris@16: #include <boost/operators.hpp>
Chris@16: #endif
Chris@16: #include <iostream>
Chris@16: //using namespace std;
Chris@16: 
Chris@16: #ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
Chris@16: namespace boost {
Chris@101: namespace iterators {
Chris@16: #endif
Chris@16: 
Chris@16: // this should use random_access_iterator_helper but I've had
Chris@16: // VC++ portablility problems with that. -JGS
Chris@16: template <class IntT>
Chris@16: class int_iterator
Chris@16: {
Chris@16:   typedef int_iterator self;
Chris@16: public:
Chris@16:   typedef std::random_access_iterator_tag iterator_category;
Chris@16:   typedef IntT value_type;
Chris@16:   typedef IntT& reference;
Chris@16:   typedef IntT* pointer;
Chris@16:   typedef std::ptrdiff_t difference_type;
Chris@16: 
Chris@16:   inline int_iterator() : _i(0) { }
Chris@16:   inline int_iterator(IntT i) : _i(i) { }
Chris@16:   inline int_iterator(const self& x) : _i(x._i) { }
Chris@16:   inline self& operator=(const self& x) { _i = x._i; return *this; }
Chris@16:   inline IntT operator*() { return _i; }
Chris@16:   inline IntT operator[](IntT n) { return _i + n; }
Chris@16:   inline self& operator++() { ++_i; return *this; }
Chris@16:   inline self operator++(int) { self t = *this; ++_i; return t; }
Chris@16:   inline self& operator+=(IntT n) { _i += n; return *this; }
Chris@16:   inline self operator+(IntT n) { self t = *this; t += n; return t; }
Chris@16:   inline self& operator--() { --_i; return *this; }
Chris@16:   inline self operator--(int) { self t = *this; --_i; return t; }
Chris@16:   inline self& operator-=(IntT n) { _i -= n; return *this; }
Chris@16:   inline IntT operator-(const self& x) const { return _i - x._i; }
Chris@16:   inline bool operator==(const self& x) const { return _i == x._i; }
Chris@16:   // vc++ had a problem finding != in random_access_iterator_helper
Chris@16:   // need to look into this... for now implementing everything here -JGS
Chris@16:   inline bool operator!=(const self& x) const { return _i != x._i; }
Chris@16:   inline bool operator<(const self& x) const { return _i < x._i; }
Chris@16:   inline bool operator<=(const self& x) const { return _i <= x._i; }
Chris@16:   inline bool operator>(const self& x) const { return _i > x._i; }
Chris@16:   inline bool operator>=(const self& x) const { return _i >= x._i; }
Chris@16: protected:
Chris@16:   IntT _i;
Chris@16: };
Chris@16: 
Chris@16: template <class IntT>
Chris@16: inline int_iterator<IntT>
Chris@16: operator+(IntT n, int_iterator<IntT> t) { t += n; return t; }
Chris@16: 
Chris@16: #ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
Chris@101: } /* namespace iterators */
Chris@101: 
Chris@101: using iterators::int_iterator;
Chris@101: 
Chris@16: } /* namespace boost */
Chris@16: #endif
Chris@16: 
Chris@16: #ifdef BOOST_NO_OPERATORS_IN_NAMESPACE
Chris@16: namespace boost {
Chris@101: using ::int_iterator;
Chris@101: namespace iterators {
Chris@101: using ::int_iterator;
Chris@101: }}
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: #endif /* BOOST_INT_ITERATOR_H */