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