Grob::internal_get_pure_property (SCM sym, int start, int end) const
{
SCM val = internal_get_property_data (sym);
- if (ly_is_procedure (val) || is_unpure_pure_container (val))
+ if (ly_is_procedure (val))
return call_pure_function (val, scm_list_1 (self_scm ()), start, end);
+
+ if (is_unpure_pure_container (val)) {
+ // Do cache, if the function ignores 'start' and 'end'
+ if (is_unchanging_unpure_pure_container (val))
+ return internal_get_property (sym);
+ else
+ 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),