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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