C++11 reverse range-based for-loop

c++, c++11, ranged-loops

Solution

Actually Boost does have such adaptor: `boost::adaptors::reverse`.

#include <list>
#include <iostream>
#include <boost/range/adaptor/reversed.hpp>

int main()
{
    std::list<int> x { 2, 3, 5, 7, 11, 13, 17, 19 };
    for (auto i : boost::adaptors::reverse(x))
        std::cout << i << '\n';
    for (auto i : x)
        std::cout << i << '\n';
}

Problem

Is there a container adapter that would reverse the direction of iterators so I can iterate over a container in reverse with range-based for-loop? With explicit iterators I would convert this: ``` for (auto i = c.begin(); i != c.end(); ++i) { ... ``` into this: ``` for (auto i = c.rbegin(); i != c.rend(); ++i) { ... ``` I want to convert this: ``` for (auto& i: c) { ... ``` to this: ``` for (auto& i: std::magic_reverse_adapter(c)) { ... ``` Is there such a thing or do I have to write it myself?

Original source