X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Fgrob-interface.hh;h=9c3eadb4b06b7deccf252f2cabfbe65f4cc91fa1;hb=77320a48ed671c658f04256d087880c1701eb746;hp=d3f7ccae7973b96a4fa3071b5dce28cf8736bd79;hpb=a6bd229f7fe1dc4a03478e14ccc0c0c66b225061;p=lilypond.git

diff --git a/lily/include/grob-interface.hh b/lily/include/grob-interface.hh
index d3f7ccae79..9c3eadb4b0 100644
--- a/lily/include/grob-interface.hh
+++ b/lily/include/grob-interface.hh
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 2002--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 2002--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -22,29 +22,49 @@
 
 #include "lily-guile.hh"
 
-#define DECLARE_GROB_INTERFACE() \
-  static SCM interface_symbol_;	   \
-  static bool has_interface (Grob*)
-
-#define ADD_INTERFACE(cl, b, c)				\
-  SCM cl::interface_symbol_; \
-  bool cl::has_interface (Grob *me)				\
-  {								\
-    return me->internal_has_interface (interface_symbol_);	\
-  }								\
-  void cl ## _init_ifaces ()					\
-  {								\
-    cl::interface_symbol_ = add_interface (#cl, b, c);		\
-  }								\
-  ADD_SCM_INIT_FUNC (cl ## ifaces, cl ## _init_ifaces);
+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);
+                   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);
+  }
+
+private:
+  static void init ()
+  {
+    interface_symbol_ = ::add_interface (cxx_name_, description_, variables_);
+  }
+
+  template <class T>
+  friend bool has_interface(Grob *);
+
+private:
+  static SCM interface_symbol_;
+  static char const *cxx_name_;
+  static char const *description_;
+  static char const *variables_;
+};
+
+template <class Interface>
+SCM Grob_interface<Interface>::interface_symbol_;
+
 #endif /* INTERFACE_HH */