C++11 Reverse Iterator Used in Ranged For Loop

reverse_iterator.cpp

//File: reverse_iterator.cpp
//Date: Thu Jul 17 09:54:05 2014 -0700

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <cstdio>
#include <limits>
using namespace std;
#define REP(x, y) for (auto x = decltype(y){0}; x < (y); x ++)
#define REPL(x, y, z) for (auto x = decltype(z){y}; x < (z); x ++)
#define REPD(x, y, z) for (auto x = decltype(z){y}; x >= (z); x --)
#define P(a) std::cout << (a) << std::endl
#define PP(a) std::cout << #a << ": " << (a) << std::endl
#define PA(arr) \
  do { \
    std::cout << #arr << ": "; \
    std::copy(begin(arr), end(arr), std::ostream_iterator<std::remove_reference<decltype(arr)>::type::value_type>(std::cout, " ")); \
    std::cout << std::endl;  \
  } while (0)

template <typename T>
class ReverseIterator {
  public:
    typedef typename T::const_reverse_iterator Titer;
    ReverseIterator(const T& t): t_(t) {}
    Titer begin() const { return t_.rbegin();}
    Titer end() const {return t_.rend();}
  private:
    const T& t_;
};

template <typename T>
ReverseIterator<T> make_riter(const T& t) {
  return ReverseIterator<T>(t);
}

int main() {
  vector<int> a {1, 2, 3, 4, 5};
  for (auto & k : make_riter(a))
    PP(k);
}