source: doc/papers/OOPSLA17/evaluation/cpp-pair.hpp @ 075c6d5

#pragma once
#include <utility>

template<typename R, typename S> struct pair {
        R first;
        S second;

        pair() = default;
        pair( R&& x, S&& y ) : first( std::move(x) ), second( std::move(y) ) {}

        bool operator< (const pair<R, S>& o) const {
                return first < o.first || ( first == o.first && second < o.second );
        }

        bool operator<= (const pair<R, S>& o) const {
                return first < o.first || ( first == o.first && second <= o.second );
        }

        bool operator== (const pair<R, S>& o) const { return first == o.first && second == o.second; }

        bool operator!= (const pair<R, S>& o) const { return first != o.first || second != o.second; }

        bool operator> (const pair<R, S>& o) const {
                return first > o.first || ( first == o.first && second > o.second );
        }

        bool operator>= (const pair<R, S>& o) const {
                return first > o.first || ( first == o.first && second >= o.second );
        }
};