+ for (vsize i = 0; i < stop_events_.size (); i++)
+ {
+ Stream_event *ev = stop_events_[i];
+ string id = robust_scm2string (ev->get_property ("spanner-id"), "");
+
+ // Find the slur that is ended with this event (by checking the spanner-id)
+ bool ended = false;
+ for (vsize j = slurs_.size (); j--;)
+ {
+ if (id == robust_scm2string (slurs_[j]->get_property ("spanner-id"), ""))
+ {
+ ended = true;
+ end_slurs_.push_back (slurs_[j]);
+ slurs_.erase (slurs_.begin () + j);
+ }
+ }
+ if (!ended)
+ ev->origin ()->warning (_ ("cannot end phrasing slur"));
+ }
+
+ for (vsize i = 0; i < start_events_.size (); i++)
+ {
+ Stream_event *ev = start_events_[i];
+ string id = robust_scm2string (ev->get_property ("spanner-id"), "");
+ bool have_slur = false;
+ // Check if we already have a slur with the same spanner-id.
+ // In that case, don't create a new slur, but print a warning
+ for (vsize i = 0; i < slurs_.size (); i++)
+ have_slur = have_slur || (id == robust_scm2string (slurs_[i]->get_property ("spanner-id"), ""));
+
+ if (have_slur)
+ ev->origin ()->warning (_ ("already have phrasing slur"));
+ else
+ {
+ Grob *slur = make_spanner ("PhrasingSlur", ev->self_scm ());
+ Direction updown = to_dir (ev->get_property ("direction"));
+ slur->set_property ("spanner-id", ly_string2scm (id));
+ if (updown)
+ set_grob_direction (slur, updown);
+ slurs_.push_back (slur);
+ }
+ }