Squashed 'third_party/boostorg/iterator/' content from commit b2adecb
Change-Id: I284a73816f9cc846742923879275b84c6e0c915c
git-subtree-dir: third_party/boostorg/iterator
git-subtree-split: b2adecb951af025698618f19a3c838bd314966dc
diff --git a/example/counting_iterator_example.cpp b/example/counting_iterator_example.cpp
new file mode 100644
index 0000000..c7d8add
--- /dev/null
+++ b/example/counting_iterator_example.cpp
@@ -0,0 +1,52 @@
+// (C) Copyright Jeremy Siek 2000-2004.
+// 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)
+
+
+#include <boost/config.hpp>
+#include <algorithm>
+#include <iostream>
+#include <iterator>
+#include <vector>
+#include <boost/iterator/counting_iterator.hpp>
+#include <boost/iterator/indirect_iterator.hpp>
+#include <boost/cstdlib.hpp>
+
+int main(int, char*[])
+{
+ // Example of using counting_iterator
+ std::cout << "counting from 0 to 4:" << std::endl;
+ boost::counting_iterator<int> first(0), last(4);
+ std::copy(first, last, std::ostream_iterator<int>(std::cout, " "));
+ std::cout << std::endl;
+
+ // Example of using counting iterator to create an array of pointers.
+ int N = 7;
+ std::vector<int> numbers;
+ typedef std::vector<int>::iterator n_iter;
+ // Fill "numbers" array with [0,N)
+ std::copy(
+ boost::counting_iterator<int>(0)
+ , boost::counting_iterator<int>(N)
+ , std::back_inserter(numbers));
+
+ std::vector<std::vector<int>::iterator> pointers;
+
+ // Use counting iterator to fill in the array of pointers.
+ // causes an ICE with MSVC6
+ 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;
+
+ return boost::exit_success;
+}