Re-factor URL parser: make grammar stateless

include/server/api/parsed_url.hpp

@@ -3,6 +3,8 @@
 
 #include "util/coordinate.hpp"
 
+#include <boost/fusion/include/adapt_struct.hpp>
+
 #include <string>
 #include <vector>
 
@@ -13,15 +15,18 @@ namespace server
 namespace api
 {
 
-struct ParsedURL
+struct ParsedURL final
 {
     std::string service;
     unsigned version;
     std::string profile;
     std::string query;
 };
-}
-}
-}
+
+} // api
+} // server
+} // osrm
+
+BOOST_FUSION_ADAPT_STRUCT(osrm::server::api::ParsedURL, service, version, profile, query)
 
 #endif