#include <iterator>
#include <vector>

template<typename T>
class reverse;

template<typename T>
class reverse<T&> {
private:
  T& _iterable;
public:
  explicit reverse(T& iterable) : _iterable{iterable} {}
  auto begin() const { return std::rbegin(_iterable); }
  auto end() const { return std::rend(_iterable); }
};

template<typename T>
class reverse<T&&> {
private:
  T _iterable;
public:
  explicit reverse(T&& iterable) : _iterable{std::move(iterable)} {}
  auto begin() const { return std::rbegin(_iterable); }
  auto end() const { return std::rend(_iterable); }
};

template<typename T>
reverse(T&& v) -> reverse<decltype(std::forward<T>(v))>;

//Usage:
void foo(int);
std::vector<int> make_vec();

void test_lvalue(std::vector<int>& lvalue) {
    for (auto i : reverse(lvalue)) {
        foo(i);
    }
}


void test_rvalue() {
    for (auto i : reverse(make_vec())) {
        foo(i);
    }
}