1 // (C) Copyright Jeremy Siek 1999. 2 // Distributed under the Boost Software License, Version 1.0. (See 3 // accompanying file LICENSE_1_0.txt or copy at 4 // http://www.boost.org/LICENSE_1_0.txt) 5 6 #ifndef BOOST_INT_ITERATOR_H 7 #define BOOST_INT_ITERATOR_H 8 9 #include <boost/iterator.hpp> 10 #if !defined BOOST_MSVC 11 #include <boost/operators.hpp> 12 #endif 13 #include <iostream> 14 //using namespace std; 15 16 #ifndef BOOST_NO_OPERATORS_IN_NAMESPACE 17 namespace boost { 18 namespace iterators { 19 #endif 20 21 // this should use random_access_iterator_helper but I've had 22 // VC++ portablility problems with that. -JGS 23 template <class IntT> 24 class int_iterator 25 { 26 typedef int_iterator self; 27 public: 28 typedef std::random_access_iterator_tag iterator_category; 29 typedef IntT value_type; 30 typedef IntT& reference; 31 typedef IntT* pointer; 32 typedef std::ptrdiff_t difference_type; 33 int_iterator()34 inline int_iterator() : _i(0) { } int_iterator(IntT i)35 inline int_iterator(IntT i) : _i(i) { } int_iterator(const self & x)36 inline int_iterator(const self& x) : _i(x._i) { } operator =(const self & x)37 inline self& operator=(const self& x) { _i = x._i; return *this; } operator *()38 inline IntT operator*() { return _i; } operator [](IntT n)39 inline IntT operator[](IntT n) { return _i + n; } operator ++()40 inline self& operator++() { ++_i; return *this; } operator ++(int)41 inline self operator++(int) { self t = *this; ++_i; return t; } operator +=(IntT n)42 inline self& operator+=(IntT n) { _i += n; return *this; } operator +(IntT n)43 inline self operator+(IntT n) { self t = *this; t += n; return t; } operator --()44 inline self& operator--() { --_i; return *this; } operator --(int)45 inline self operator--(int) { self t = *this; --_i; return t; } operator -=(IntT n)46 inline self& operator-=(IntT n) { _i -= n; return *this; } operator -(const self & x) const47 inline IntT operator-(const self& x) const { return _i - x._i; } operator ==(const self & x) const48 inline bool operator==(const self& x) const { return _i == x._i; } 49 // vc++ had a problem finding != in random_access_iterator_helper 50 // need to look into this... for now implementing everything here -JGS operator !=(const self & x) const51 inline bool operator!=(const self& x) const { return _i != x._i; } operator <(const self & x) const52 inline bool operator<(const self& x) const { return _i < x._i; } operator <=(const self & x) const53 inline bool operator<=(const self& x) const { return _i <= x._i; } operator >(const self & x) const54 inline bool operator>(const self& x) const { return _i > x._i; } operator >=(const self & x) const55 inline bool operator>=(const self& x) const { return _i >= x._i; } 56 protected: 57 IntT _i; 58 }; 59 60 template <class IntT> 61 inline int_iterator<IntT> operator +(IntT n,int_iterator<IntT> t)62operator+(IntT n, int_iterator<IntT> t) { t += n; return t; } 63 64 #ifndef BOOST_NO_OPERATORS_IN_NAMESPACE 65 } /* namespace iterators */ 66 67 using iterators::int_iterator; 68 69 } /* namespace boost */ 70 #endif 71 72 #ifdef BOOST_NO_OPERATORS_IN_NAMESPACE 73 namespace boost { 74 using ::int_iterator; 75 namespace iterators { 76 using ::int_iterator; 77 }} 78 #endif 79 80 81 #endif /* BOOST_INT_ITERATOR_H */ 82