+
+ friend class Slur_configuration_less;
+};
+
+// Comparator for a queue of Beam_configuration*.
+class Slur_configuration_less
+{
+public:
+ bool operator () (Slur_configuration *const &l, Slur_configuration *const &r)
+ {
+ // Invert
+ return l->score_ > r->score_;
+ }