Add hash for XrefItem

Author: plafosse

ui/xreflist.h

@@ -117,6 +117,17 @@ class XrefItem
 	int row() const;
 	bool operator==(const XrefItem& other) const;
 	bool operator!=(const XrefItem& other) const;
+	size_t operator()(const XrefItem& item) const
+	{
+		size_t hash = std::hash<uint64_t>()(item.addr());
+		hash ^= std::hash<int>()(item.type()) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+		hash ^= std::hash<int>()(item.direction()) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+		hash ^= std::hash<int>()(item.kind()) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+		hash ^= std::hash<size_t>()(item.instrId()) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+		hash ^= std::hash<uint64_t>()(item.func() ? item.func()->GetStart() : 0) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+		hash ^= std::hash<int>()(item.ilType()) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+		return hash;
+	}
 };
 
 /*!