--- /dev/null
+////////////////////////////////////////////////////////////////////////////////\r
+\r
+// Author: Andy Rushton, from an original by Dan Milton\r
+// Copyright: (c) Southampton University 1999-2004\r
+// (c) Andy Rushton 2004-2009\r
+// License: BSD License, see ../docs/license.html\r
+\r
+////////////////////////////////////////////////////////////////////////////////\r
+\r
+namespace stlplus\r
+{\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+ // the triple class\r
+\r
+ template<typename T1, typename T2, typename T3>\r
+ triple<T1,T2,T3>::triple(void) :\r
+ first(), second(), third()\r
+ {\r
+ }\r
+\r
+ template<typename T1, typename T2, typename T3>\r
+ triple<T1,T2,T3>::triple(const T1& p1, const T2& p2, const T3& p3) :\r
+ first(p1), second(p2), third(p3)\r
+ {\r
+ }\r
+\r
+ template<typename T1, typename T2, typename T3>\r
+ triple<T1,T2,T3>::triple(const triple<T1,T2,T3>& t2) :\r
+ first(t2.first), second(t2.second), third(t2.third)\r
+ {\r
+ }\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+ // creation\r
+\r
+ template<typename T1, typename T2, typename T3>\r
+ triple<T1,T2,T3> make_triple(const T1& first, const T2& second, const T3& third)\r
+ {\r
+ return triple<T1,T2,T3>(first,second,third);\r
+ }\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+ // comparison\r
+\r
+ template<typename T1, typename T2, typename T3>\r
+ bool operator == (const triple<T1,T2,T3>& left, const triple<T1,T2,T3>& right)\r
+ {\r
+ // triples are equal if all elements are equal\r
+ return left.first == right.first && left.second == right.second && left.third == right.third;\r
+ }\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+\r
+} // end namespace stlplus\r
+\r