Re: Code pointer from end-BarLine to previous NoteHead.?

[David Kastrup]

Jean Abou Samra <jean@abou-samra.fr> writes:

[Harm:]

>> After some further hours of work, following a different idea, it now
>> displays #<Grob BarLine > (as it should).
>>
>> I'm not able to say what happened, I'm not able to debug because of
>> that unhelpful (oh, I'm very polite this evening) guile messages, see
>> the other thread.
>>
>> I'm overtired like hell, close to trashing the whole project, and
>> close to advertising everyone to not use LilyPond for huge custom
>> codings.
>
>
> Well, how about rolling up your sleeves and working
> on that issue with unhelpful messages? See also my recent
> message to lilypond-devel about the need for help to
> fix regressions.

You are aware that you are not talking to a C++ programmer?  Not exactly
a motivating message under the circumstances...

Would something like this be a reasonable patch?

>From 7e4ff15a40158db8fc065623fbb0f0549ba75f0c Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Mon, 18 Jul 2022 00:38:54 +0200
Subject: [PATCH] Include "dead" in name of grobs without reflection

Nothing to do with (undead) vampires: reflection means containing a
type description, and `ly:grob-suicide!` removes that.
---
 lily/grob.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lily/grob.cc b/lily/grob.cc
index 009c4de206..e014e0dc84 100644
--- a/lily/grob.cc
+++ b/lily/grob.cc
@@ -788,7 +788,9 @@ Grob::name () const
   SCM meta = get_property (this, "meta");
   SCM nm = scm_assq (ly_symbol2scm ("name"), meta);
   nm = (scm_is_pair (nm)) ? scm_cdr (nm) : SCM_EOL;
-  return scm_is_symbol (nm) ? ly_symbol2string (nm) : class_name ();
+  return scm_is_symbol (nm)
+    ? ly_symbol2string (nm)
+    : string ("dead ").append (class_name ());
 }
 
 ADD_INTERFACE (Grob,
-- 
2.34.1



-- 
David Kastrup