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00001 #ifndef PhysicsTools_Utilities_Difference_h 00002 #define PhysicsTools_Utilities_Difference_h 00003 #include "PhysicsTools/Utilities/interface/Sum.h" 00004 #include "PhysicsTools/Utilities/interface/Minus.h" 00005 00006 namespace funct { 00007 00008 template<typename A, typename B> 00009 struct Difference { 00010 typedef typename Sum<A, typename Minus<B>::type>::type type; 00011 inline static type combine(const A& a, const B& b) { return a + (-b); } 00012 }; 00013 00014 template<typename A, typename B> 00015 inline typename Difference<A, B>::type operator-(const A& a, const B& b) { 00016 return Difference<A, B>::combine(a, b); 00017 } 00018 00019 } 00020 00021 #endif
1.7.3