move over iterator adaptor examples from 'utility'

[SVN r25979]

test/reverse_iterator_example.cpp

@@ -0,0 +1,47 @@
+// (C) Copyright Jeremy Siek 2000.
+// 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 <iostream>
+#include <algorithm>
+#include <boost/iterator/reverse_iterator.hpp>
+#include <boost/detail/iterator.hpp>
+
+//boost::detail::iterator_traits
+int main(int, char*[])
+{
+  char letters_[] = "hello world!";
+  const int N = sizeof(letters_)/sizeof(char) - 1;
+  typedef char* base_iterator;
+  base_iterator letters(letters_);
+  
+  std::cout << "original sequence of letters:\t"
+            << letters_ << std::endl;
+
+  std::sort(letters, letters + N);
+
+  // Use reverse_iterator_generator to print a sequence
+  // of letters in reverse order.
+  
+  boost::reverse_iterator<base_iterator>
+    reverse_letters_first(letters + N),
+    reverse_letters_last(letters);
+
+  std::cout << "letters in descending order:\t";
+  std::copy(reverse_letters_first, reverse_letters_last,
+            std::ostream_iterator<char>(std::cout));
+  std::cout << std::endl;
+
+  // Use make_reverse_iterator() to print the sequence
+  // of letters in reverse-reverse order.
+
+  std::cout << "letters in ascending order:\t";
+  std::copy(boost::make_reverse_iterator(reverse_letters_last),
+            boost::make_reverse_iterator(reverse_letters_first),
+            std::ostream_iterator<char>(std::cout));
+  std::cout << std::endl;
+
+  return 0;
+}