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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 <boost/config.hpp>
#include <iostream>
#include <iterator>
#include <vector>
#include <boost/counting_iterator.hpp>
#include <boost/iterator_adaptors.hpp>
int main(int, char*[])
{
// Example of using counting_iterator_generator
std::cout << "counting from 0 to 4:" << std::endl;
boost::counting_iterator_generator<int>::type first(0), last(4);
std::copy(first, last, std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
// Example of using make_counting_iterator()
std::cout << "counting from -5 to 4:" << std::endl;
std::copy(boost::make_counting_iterator(-5),
boost::make_counting_iterator(5),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
// Example of using counting iterator to create an array of pointers.
const int N = 7;
std::vector<int> numbers;
// Fill "numbers" array with [0,N)
std::copy(boost::make_counting_iterator(0), boost::make_counting_iterator(N),
std::back_inserter(numbers));
std::vector<std::vector<int>::iterator> pointers;
// VC6 gets an internal compiler error on this
#if !defined(BOOST_MSVC) || (BOOST_MSVC > 1200)
// Use counting iterator to fill in the array of pointers.
std::copy(boost::make_counting_iterator(numbers.begin()),
boost::make_counting_iterator(numbers.end()),
std::back_inserter(pointers));
// Use indirect iterator to print out numbers by accessing
// them through the array of pointers.
std::cout << "indirectly printing out the numbers from 0 to "
<< N << std::endl;
std::copy(boost::make_indirect_iterator(pointers.begin()),
boost::make_indirect_iterator(pointers.end()),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
#endif
return 0;
}
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