+ Xapian::Query operator() (const std::string &begin, const std::string &end);
+};
+
+class DateFieldProcessor : public Xapian::FieldProcessor {
+private:
+ Xapian::valueno slot;
+public:
+ DateFieldProcessor(Xapian::valueno slot_) : slot(slot_) { };
+ Xapian::Query operator()(const std::string & str);