Fix some bugs in the dynamic engraver and PostScript backend

[lilypond.git] / lily / grob-property.cc

diff --git a/lily/grob-property.cc b/lily/grob-property.cc
index 59a3cd68f2a2e79cf6ad3701a84320646c1812e7..c4dce927b43f86f3265348779ede3ef846f6b1b9 100644 (file)
--- a/lily/grob-property.cc
+++ b/lily/grob-property.cc
@@ -55,6 +55,7 @@ Grob::internal_set_property (SCM sym, SCM v)
     {
       if (!ly_is_procedure (v)
          && !is_simple_closure (v)
+         && v != ly_symbol2scm ("calculation-in-progress") 
          && !type_check_assignment (sym, v, ly_symbol2scm ("backend-type?")))
        abort ();
       check_interfaces_for_property (this, sym);
@@ -108,6 +109,7 @@ Grob::internal_get_property (SCM sym) const
 
 #ifndef NDEBUG
 #include "protected-scm.hh"
+
 Protected_scm grob_property_callback_stack = SCM_EOL;
 bool debug_property_callbacks = 0;
 #endif
@@ -191,3 +193,10 @@ Grob::is_live () const
 {
   return immutable_property_alist_ != SCM_EOL;
 }
+
+
+bool
+Grob::internal_has_interface (SCM k)
+{
+  return scm_c_memq (k, interfaces_) != SCM_BOOL_F;
+}