-
-bool is_unpure_pure_container (SCM s);
-SCM unpure_pure_container_unpure_part (SCM smob);
-SCM unpure_pure_container_pure_part (SCM smob);
-SCM ly_make_unpure_pure_container (SCM, SCM);
+#include "small-smobs.hh"
+
+class Unpure_pure_container : public Smob2<Unpure_pure_container>
+{
+public:
+ static const char type_p_name_ [];
+ SCM unpure_part () const { return scm1 (); }
+ // A container that has the same callback for both 'pure' and 'unpure' lookups
+ // and which ignores the 'start' and 'end' columnns.
+ // Such a callback will give the same answer for tentative or final layouts.
+ bool is_unchanging () const { return SCM_UNBNDP (scm2 ()); }
+ SCM pure_part () const;
+ static SCM make_smob (SCM a, SCM b = SCM_UNDEFINED)
+ {
+ if (SCM_UNBNDP (b) && !ly_is_procedure (a))
+ return Smob2<Unpure_pure_container>::make_smob (a, a);
+ return Smob2<Unpure_pure_container>::make_smob (a, b);
+ }
+ int print_smob (SCM, scm_print_state *);
+};