Pass an object as const ref

Co-authored-by: Charles-Henri Bruyand <charleshenri.bruyand+github@gmail.com>
(cherry picked from commit fa61cf82d85f5e26178853e9b0f4be14f55565db)

diff --git a/pdns/qtype.hh b/pdns/qtype.hh
index f314da124da2f1398b00ad960746e3e6e77d24b7..d712317129fa6ceed46ce74d04d620d4a261ceca 100644 (file)
--- a/pdns/qtype.hh
+++ b/pdns/qtype.hh
@@ -150,7 +150,7 @@ namespace std {
   };
 }
 
-inline std::ostream& operator<<(std::ostream& stream, QType qtype)
+inline std::ostream& operator<<(std::ostream& stream, const QType& qtype)
 {
   return stream << qtype.toString();
 }