| 1 | // -*- c++ -*- |
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| 2 | #ifndef EXTENDED_PAIR_H |
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| 3 | #define EXTENDED_PAIR_H |
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| 4 | |
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| 5 | template <typename T1, typename A1, typename T2, typename A2> |
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| 6 | struct extended_pair { |
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| 7 | typedef T1 first_type; |
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| 8 | typedef T2 second_type; |
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| 9 | |
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| 10 | extended_pair() : first(), second() {} |
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| 11 | |
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| 12 | extended_pair(A1 f, A2 s) : first(f), second(s) {} |
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| 13 | |
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| 14 | template <class Pair> |
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| 15 | extended_pair(const Pair& pair) : first(pair.first), second(pair.second) {} |
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| 16 | |
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| 17 | T1 first; |
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| 18 | T2 second; |
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| 19 | }; |
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| 20 | |
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| 21 | template <typename T1, typename T2, |
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| 22 | typename LA1, typename LA2, typename RA1, typename RA2> |
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| 23 | bool operator==(const extended_pair<T1, LA1, T2, LA2>& left, |
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| 24 | const extended_pair<T1, RA1, T2, RA2>& right) { |
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| 25 | return left.first == right.first && left.second == right.second; |
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| 26 | } |
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| 27 | |
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| 28 | template <typename T1, typename T2, |
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| 29 | typename LA1, typename LA2, typename RA1, typename RA2> |
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| 30 | bool operator!=(const extended_pair<T1, LA1, T2, LA2>& left, |
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| 31 | const extended_pair<T1, RA1, T2, RA2>& right) { |
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| 32 | return !(left == right); |
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| 33 | } |
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| 34 | |
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| 35 | template <typename T1, typename T2, |
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| 36 | typename LA1, typename LA2, typename RA1, typename RA2> |
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| 37 | bool operator<(const extended_pair<T1, LA1, T2, LA2>& left, |
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| 38 | const extended_pair<T1, RA1, T2, RA2>& right) { |
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| 39 | if (left.first == right.first) return left.second == right.second; |
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| 40 | return left.first < right.first; |
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| 41 | } |
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| 42 | |
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| 43 | template <typename T1, typename T2, |
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| 44 | typename LA1, typename LA2, typename RA1, typename RA2> |
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| 45 | bool operator>(const extended_pair<T1, LA1, T2, LA2>& left, |
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| 46 | const extended_pair<T1, RA1, T2, RA2>& right) { |
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| 47 | return right < left; |
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| 48 | } |
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| 49 | |
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| 50 | template <typename T1, typename T2, |
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| 51 | typename LA1, typename LA2, typename RA1, typename RA2> |
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| 52 | bool operator<=(const extended_pair<T1, LA1, T2, LA2>& left, |
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| 53 | const extended_pair<T1, RA1, T2, RA2>& right) { |
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| 54 | return !(right > left); |
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| 55 | } |
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| 56 | |
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| 57 | template <typename T1, typename T2, |
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| 58 | typename LA1, typename LA2, typename RA1, typename RA2> |
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| 59 | bool operator>=(const extended_pair<T1, LA1, T2, LA2>& left, |
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| 60 | const extended_pair<T1, RA1, T2, RA2>& right) { |
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| 61 | return !(right < left); |
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| 62 | } |
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| 63 | |
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| 64 | |
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| 65 | #endif |
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