[Boost-bugs] [Boost C++ Libraries] #9519: wrong results for strided, reversed range

Subject: [Boost-bugs] [Boost C++ Libraries] #9519: wrong results for strided, reversed range
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-12-24 01:03:57

#9519: wrong results for strided, reversed range
------------------------------+------------------------
 Reporter:  eric_niebler      |      Owner:  neilgroves
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  range
  Version:  Boost 1.54.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+------------------------
 The following code:

 {{{
 #include <vector>
 #include <numeric>
 #include <iostream>
 #include <boost/range/adaptor/strided.hpp>
 #include <boost/range/adaptor/reversed.hpp>

 int main()
 {
     std::vector<int> vi(50);
     std::iota(vi.begin(), vi.end(), 0);
     using namespace boost::adaptors;
     for(int i : vi | strided(3) | reversed)
         std::cout << i << ' ';
     std::cout << '\n';
 }
 }}}

 Yields the following output for me:

 {{{
 13 10 7 4 1 0
 }}}

 That's whack. I don't understand it at all. I would expect it to count
 down from 50 by steps of 3.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9519>
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