moved integer_range to its own file

[SVN r7717]

include/boost/pending/detail/int_iterator.hpp

@@ -0,0 +1,68 @@
+//  (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
+//  sell and distribute this software is granted provided this
+//  copyright notice appears in all copies. This software is provided
+//  "as is" without express or implied warranty, and with no claim as
+//  to its suitability for any purpose.
+
+#ifndef BOOST_INT_ITERATOR_H
+#define BOOST_INT_ITERATOR_H
+
+#include <boost/iterator.hpp>
+#if !defined BOOST_MSVC
+#include <boost/operators.hpp>
+#endif
+#include <iostream>
+//using namespace std;
+
+#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
+namespace boost {
+#endif
+
+// this should use random_access_iterator_helper but I've had
+// VC++ portablility problems with that. -JGS
+template <class IntT>
+class int_iterator
+{
+  typedef int_iterator self;
+public:
+  typedef std::random_access_iterator_tag iterator_category;
+  typedef IntT value_type;
+  typedef IntT& reference;
+  typedef IntT* pointer;
+  typedef ptrdiff_t difference_type;
+
+  inline int_iterator() : _i(0) { }
+  inline int_iterator(IntT i) : _i(i) { }
+  inline int_iterator(const self& x) : _i(x._i) { }
+  inline self& operator=(const self& x) { _i = x._i; return *this; }
+  inline IntT operator*() { return _i; }
+  inline IntT operator[](IntT n) { return _i + n; }
+  inline self& operator++() { ++_i; return *this; }
+  inline self operator++(int) { self t = *this; ++_i; return t; }
+  inline self& operator+=(IntT n) { _i += n; return *this; }
+  inline self operator+(IntT n) { self t = *this; t._i += n; return t; }
+  inline self& operator--() { --_i; return *this; }
+  inline self operator--(int) { self t = *this; --_i; return t; }
+  inline self& operator-=(IntT n) { _i -= n; return *this; }
+  inline IntT operator-(const self& x) const { return _i - x._i; }
+  inline bool operator==(const self& x) const { return _i == x._i; }
+  // vc++ had a problem finding != in random_access_iterator_helper
+  // need to look into this... for now implementing everything here -JGS
+  inline bool operator!=(const self& x) const { return _i != x._i; }
+  inline bool operator<(const self& x) const { return _i < x._i; }
+protected:
+  IntT _i;
+};
+
+#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
+} /* namespace boost */
+#endif
+
+#ifdef BOOST_NO_OPERATORS_IN_NAMESPACE
+namespace boost {
+  using ::int_iterator;
+}
+#endif
+
+
+#endif /* BOOST_INT_ITERATOR_H */