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// (C) Copyright Jeremy Siek 2000. 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.
#include <functional>
#include <algorithm>
#include <iostream>
#include <boost/iterator_adaptors.hpp>
#include <boost/pending/integer_range.hpp>
int
main(int, char*[])
{
// This is a simple example of using the transform_iterators class to
// generate iterators that multiply the value returned by dereferencing
// the iterator. In this case we are multiplying by 2.
// Would be cooler to use lambda library in this example.
int x[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
typedef std::binder1st< std::multiplies<int> > Function;
typedef boost::transform_iterator_generator<Function, int*
>::type doubling_iterator;
doubling_iterator i(x, std::bind1st(std::multiplies<int>(), 2)),
i_end(x + sizeof(x)/sizeof(int), std::bind1st(std::multiplies<int>(), 2));
std::cout << "multiplying the array by 2:" << std::endl;
while (i != i_end)
std::cout << *i++ << " ";
std::cout << std::endl;
// Here is an example of counting from 0 to 5 using the integer_range class.
boost::integer_range<int> r(0,5);
std::cout << "counting to from 0 to 4:" << std::endl;
std::copy(r.begin(), r.end(), std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
return 0;
}
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