X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fgrob-scheme.cc;h=9ae9c14fcbd3698a57adff41dfecf6edb80d5529;hb=cfb3105646db41346c7739ff8f8bc089b4c66c84;hp=1fe50f00f18b49afb443c5a91ff6014f0c9c3321;hpb=cb951038d3e74a85ec8539d0dc51260088251556;p=lilypond.git

diff --git a/lily/grob-scheme.cc b/lily/grob-scheme.cc
index 1fe50f00f1..9ae9c14fcb 100644
--- a/lily/grob-scheme.cc
+++ b/lily/grob-scheme.cc
@@ -25,6 +25,7 @@
 #include "paper-score.hh"
 #include "simple-closure.hh"
 #include "system.hh"
+#include "unpure-pure-container.hh"
 #include "warn.hh"              // error ()
 
 LY_DEFINE (ly_grob_property_data, "ly:grob-property-data",
@@ -66,7 +67,7 @@ LY_DEFINE (ly_grob_set_nested_property_x, "ly:grob-set-nested-property!",
 
   LY_ASSERT_SMOB (Grob, grob, 1);
 
-  bool type_ok = ly_cheap_is_list (symlist);
+  bool type_ok = scm_is_pair (symlist);
 
   if (type_ok)
     for (SCM s = symlist; scm_is_pair (s) && type_ok; s = scm_cdr (s))
@@ -74,7 +75,10 @@ LY_DEFINE (ly_grob_set_nested_property_x, "ly:grob-set-nested-property!",
 
   SCM_ASSERT_TYPE (type_ok, symlist, SCM_ARG2, __FUNCTION__, "list of symbols");
 
-  set_nested_property (sc, symlist, val);
+  if (scm_is_pair (scm_cdr (symlist)))
+    set_nested_property (sc, symlist, val);
+  else
+    ly_grob_set_property_x (grob, scm_car (symlist), val);
   return SCM_UNSPECIFIED;
 }
 
@@ -447,7 +451,7 @@ LY_DEFINE (ly_grob_chain_callback, "ly:grob-chain-callback",
   Grob *gr = unsmob_grob (grob);
 
   LY_ASSERT_SMOB (Grob, grob, 1);
-  LY_ASSERT_TYPE (ly_is_procedure, proc, 2);
+  SCM_ASSERT_TYPE (ly_is_procedure (proc) || is_unpure_pure_container (proc), proc, SCM_ARG2, __FUNCTION__, "procedure or unpure pure container");
   LY_ASSERT_TYPE (ly_is_symbol, sym, 3);
 
   chain_callback (gr, proc, sym);
@@ -477,4 +481,4 @@ LY_DEFINE (ly_grob_get_vertical_axis_group_index, "ly:grob-get-vertical-axis-gro
   LY_ASSERT_SMOB (Grob, grob, 1);
 
   return scm_from_int (Grob::get_vertical_axis_group_index (gr));
-}
\ No newline at end of file
+}