+/* Unlike internal_get_property, this function does no caching. Use it, therefore, with caution. */
+SCM
+Grob::internal_get_pure_property (SCM sym, int start, int end) const
+{
+ SCM val = internal_get_property_data (sym);
+ if (ly_is_procedure (val))
+ return call_pure_function (val, scm_list_1 (self_scm ()), start, end);
+ if (is_simple_closure (val))
+ return evaluate_with_simple_closure (self_scm (),
+ simple_closure_expression (val),
+ true, start, end);
+ return val;
+}
+
+SCM
+Grob::internal_get_maybe_pure_property (SCM sym, bool pure, int start, int end) const
+{
+ return pure ? internal_get_pure_property (sym, start, end) : internal_get_property (sym);
+}
+
+SCM
+Grob::try_callback_on_alist (SCM *alist, SCM sym, SCM proc)
+{
+ SCM marker = ly_symbol2scm ("calculation-in-progress");
+ /*
+ need to put a value in SYM to ensure that we don't get a
+ cyclic call chain.
+ */
+ *alist = scm_assq_set_x (*alist, sym, marker);
+
+#ifndef NDEBUG
+ if (debug_property_callbacks)
+ grob_property_callback_stack = scm_cons (scm_list_3 (self_scm (), sym, proc), grob_property_callback_stack);
+#endif
+
+ SCM value = SCM_EOL;
+ if (ly_is_procedure (proc))
+ value = scm_call_1 (proc, self_scm ());
+ else if (is_simple_closure (proc))
+ {
+ value = evaluate_with_simple_closure (self_scm (),
+ simple_closure_expression (proc),
+ false, 0, 0);