sl@0: // (C) Copyright David Abrahams and Jeremy Siek 2000-2001.
sl@0: // Distributed under the Boost Software License, Version 1.0. (See
sl@0: // accompanying file LICENSE_1_0.txt or copy at
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: //
sl@0: // Revision History:
sl@0: // 04 Jan 2001  Factored counting_iterator stuff into
sl@0: //              boost/counting_iterator.hpp (David Abrahams)
sl@0: 
sl@0: #ifndef BOOST_INTEGER_RANGE_HPP_
sl@0: #define BOOST_INTEGER_RANGE_HPP_
sl@0: 
sl@0: #include <boost/config.hpp>
sl@0: #include <boost/iterator/counting_iterator.hpp>
sl@0: #include <algorithm>
sl@0: 
sl@0: namespace boost {
sl@0: 
sl@0: //=============================================================================
sl@0: // Counting Iterator and Integer Range Class
sl@0: 
sl@0: template <class IntegerType>
sl@0: struct integer_range {
sl@0:     typedef counting_iterator<IntegerType> iterator;
sl@0: 
sl@0:     typedef iterator const_iterator;
sl@0:     typedef IntegerType value_type;
sl@0:     typedef std::ptrdiff_t difference_type;
sl@0:     typedef IntegerType reference;
sl@0:     typedef IntegerType const_reference;
sl@0:     typedef const IntegerType* pointer;
sl@0:     typedef const IntegerType* const_pointer;
sl@0:     typedef IntegerType size_type;
sl@0: 
sl@0:     integer_range(IntegerType start, IntegerType finish)
sl@0:         : m_start(start), m_finish(finish) { }
sl@0: 
sl@0:     iterator begin() const { return iterator(m_start); }
sl@0:     iterator end() const { return iterator(m_finish); }
sl@0:     size_type size() const { return m_finish - m_start; }
sl@0:     bool empty() const { return m_finish == m_start; }
sl@0:     void swap(integer_range& x) {
sl@0:         std::swap(m_start, x.m_start);
sl@0:         std::swap(m_finish, x.m_finish);
sl@0:     }
sl@0: protected:
sl@0:     IntegerType m_start, m_finish;
sl@0: };
sl@0: 
sl@0: template <class IntegerType>
sl@0: inline integer_range<IntegerType>
sl@0: make_integer_range(IntegerType first, IntegerType last)
sl@0: {
sl@0:   return integer_range<IntegerType>(first, last);
sl@0: }
sl@0: 
sl@0: } // namespace boost
sl@0: 
sl@0: #endif // BOOST_INTEGER_RANGE_HPP_