deba@782: // -*- c++ -*-
deba@782: #ifndef EXTENDED_PAIR_H
deba@782: #define EXTENDED_PAIR_H
deba@782: 
deba@782: template <typename T1, typename A1, typename T2, typename A2>
deba@782: struct extended_pair {
deba@782:   typedef T1 first_type;
deba@782:   typedef T2 second_type;
deba@782: 
deba@782:   extended_pair() : first(), second() {}
deba@782: 
deba@782:   extended_pair(A1 f, A2 s) : first(f), second(s) {}
deba@782: 
deba@782:   template <class Pair>
deba@782:   extended_pair(const Pair& pair) : first(pair.first), second(pair.second) {}
deba@782: 
deba@782:   T1 first;
deba@782:   T2 second;
deba@782: };
deba@782: 
deba@782: template <typename T1, typename T2, 
deba@782: 	  typename LA1, typename LA2, typename RA1, typename RA2>
deba@782: bool operator==(const extended_pair<T1, LA1, T2, LA2>& left, 
deba@782: 		const extended_pair<T1, RA1, T2, RA2>& right) {
deba@782:   return left.first == right.first && left.second == right.second;
deba@782: }
deba@782: 
deba@782: template <typename T1, typename T2, 
deba@782: 	  typename LA1, typename LA2, typename RA1, typename RA2>
deba@782: bool operator!=(const extended_pair<T1, LA1, T2, LA2>& left, 
deba@782: 		const extended_pair<T1, RA1, T2, RA2>& right) {
deba@782:   return  !(left == right);
deba@782: }
deba@782: 
deba@782: template <typename T1, typename T2, 
deba@782: 	  typename LA1, typename LA2, typename RA1, typename RA2>
deba@782: bool operator<(const extended_pair<T1, LA1, T2, LA2>& left, 
deba@782: 		const extended_pair<T1, RA1, T2, RA2>& right) {
deba@782:   if (left.first == right.first) return left.second == right.second;
deba@782:   return left.first < right.first;
deba@782: }
deba@782: 
deba@782: template <typename T1, typename T2, 
deba@782: 	  typename LA1, typename LA2, typename RA1, typename RA2>
deba@782: bool operator>(const extended_pair<T1, LA1, T2, LA2>& left, 
deba@782: 		const extended_pair<T1, RA1, T2, RA2>& right) {
deba@782:   return right < left;
deba@782: }
deba@782: 
deba@782: template <typename T1, typename T2, 
deba@782: 	  typename LA1, typename LA2, typename RA1, typename RA2>
deba@782: bool operator<=(const extended_pair<T1, LA1, T2, LA2>& left, 
deba@782: 		const extended_pair<T1, RA1, T2, RA2>& right) {
deba@782:   return !(right > left);
deba@782: }
deba@782: 
deba@782: template <typename T1, typename T2, 
deba@782: 	  typename LA1, typename LA2, typename RA1, typename RA2>
deba@782: bool operator>=(const extended_pair<T1, LA1, T2, LA2>& left, 
deba@782: 		const extended_pair<T1, RA1, T2, RA2>& right) {
deba@782:   return !(right < left);
deba@782: }
deba@782: 
deba@782: 
deba@782: #endif