-inline unsigned int order_pair_hash_Function(OrderPair* This){
- uint64_t x=This->first^This->second;
- uint64_t a=This->first&This->second;
- return (uint)((x<<4)^(a));
+static inline unsigned int order_pair_hash_Function(OrderPair* This){
+ return (uint) (This->first << 2) ^ This->second;