--- /dev/null
+/*
+ stcol.hh -- part of LilyPond
+
+ (c) 1996 Han-Wen Nienhuys
+*/
+
+#ifndef STCOL_HH
+#define STCOL_HH
+#include "proto.hh"
+#include "vray.hh"
+
+/// store simultaneous requests
+struct Staff_column {
+ /// indirection
+ Score_column *score_column;
+
+ /// fields to collect data vertically.
+ svec<Voice_element *> v_elts;
+
+ /// idem
+ svec<Command *> s_commands;
+
+ /****************/
+
+ Staff_column(Score_column*s);
+ bool mus() const;
+ Real when() const;
+ void add(Voice_element*ve);
+ /****************************************************************
+ VIRTUAL
+ ****************************************************************/
+
+ virtual void process_requests()=0;
+
+ virtual ~Staff_column() { }
+};
+
+
+#endif // STCOL_HH
+