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