reverse_iterator.h

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// Taken from https://gist.github.com/arvidsson/7231973

#ifndef BITCOIN_REVERSE_ITERATOR_HPP
#define BITCOIN_REVERSE_ITERATOR_HPP

template <typename T> class reverse_range {
    T &x;

public:
    explicit reverse_range(T &xin) : x(xin) {}

    auto begin() const -> decltype(this->x.rbegin()) { return x.rbegin(); }

    auto end() const -> decltype(this->x.rend()) { return x.rend(); }
};

template <typename T> reverse_range<T> reverse_iterate(T &x) {
    return reverse_range<T>(x);
}

#endif // BITCOIN_REVERSE_ITERATOR_HPP