+#include "lily-guile.hh"
+#include "protected-scm.hh"
+
+class Grob;
+
+#define ADD_INTERFACE(cl, b, c) \
+ Grob_interface<cl> cl ## _interface_initializer; \
+ template <> char const *Grob_interface<cl>::cxx_name_ (#cl); \
+ template <> char const *Grob_interface<cl>::description_ (b); \
+ template <> char const *Grob_interface<cl>::variables_ (c);
+
+SCM add_interface (char const *cxx_name,
+ char const *descr,
+ char const *vars);
+
+SCM ly_add_interface (SCM, SCM, SCM);
+void internal_add_interface (SCM, SCM, SCM);
+SCM ly_all_grob_interfaces ();
+
+template <class Interface>
+class Grob_interface
+{
+public:
+ Grob_interface ()
+ {
+ add_scm_init_func (Grob_interface::init);
+ }