1 // (C) Copyright David Abrahams and Jeremy Siek 2000-2001.
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)
7 // 04 Jan 2001 Factored counting_iterator stuff into
8 // boost/counting_iterator.hpp (David Abrahams)
10 #ifndef BOOST_INTEGER_RANGE_HPP_
11 #define BOOST_INTEGER_RANGE_HPP_
13 #include <boost/config.hpp>
14 #include <boost/iterator/counting_iterator.hpp>
19 //=============================================================================
20 // Counting Iterator and Integer Range Class
22 template <class IntegerType>
23 struct integer_range {
24 typedef counting_iterator<IntegerType> iterator;
26 typedef iterator const_iterator;
27 typedef IntegerType value_type;
28 typedef std::ptrdiff_t difference_type;
29 typedef IntegerType reference;
30 typedef IntegerType const_reference;
31 typedef const IntegerType* pointer;
32 typedef const IntegerType* const_pointer;
33 typedef IntegerType size_type;
35 integer_range(IntegerType start, IntegerType finish)
36 : m_start(start), m_finish(finish) { }
38 iterator begin() const { return iterator(m_start); }
39 iterator end() const { return iterator(m_finish); }
40 size_type size() const { return m_finish - m_start; }
41 bool empty() const { return m_finish == m_start; }
42 void swap(integer_range& x) {
43 std::swap(m_start, x.m_start);
44 std::swap(m_finish, x.m_finish);
47 IntegerType m_start, m_finish;
50 template <class IntegerType>
51 inline integer_range<IntegerType>
52 make_integer_range(IntegerType first, IntegerType last)
54 return integer_range<IntegerType>(first, last);
59 #endif // BOOST_INTEGER_RANGE_HPP_