reverse_iterate.h

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// Copyright (c) 2017-2020 The PIVX Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef PIVX_REVERSE_ITERATE_H
#define PIVX_REVERSE_ITERATE_H
 
template <typename T>
class reverse_range
{
    T &m_x;
 
public:
    explicit reverse_range(T &x) : m_x(x) {}
 
    auto begin() const -> decltype(this->m_x.rbegin())
    {
        return m_x.rbegin();
    }
 
    auto end() const -> decltype(this->m_x.rend())
    {
        return m_x.rend();
    }
};
 
template <typename T>
reverse_range<T> reverse_iterate(T &x)
{
    return reverse_range<T>(x);
}
 
#endif // PIVX_REVERSE_ITERATE_H