I'm trying to understand how to use defineBarLine, based on the
documentation in Notation Reference 1.2.5, and bar-line.scm. The
meaning of the "bartype" argument seems to not be exactly explained
anywhere, but from what is said (mostly in bar-line.scm), and a lot of
experimentation, I deduce that all the characters before a possible "-"
are taken to be names of existing barline glyph elements, and the new
barline glyph is the concatenation of those.
Moreover, from the documentation, the second argument is a list of 3
things that define the behavior at a line break or for spanning multiple
staves. So I expected these to have no effect when the barline is
occuring in the middle of a single staff.
However, I'm seeing some different behavior:
\version "2.24.0"
\relative c'' {
\defineBarLine ":;|!-a" #'(#t #t #t)
\defineBarLine ":;|!-b" #'(#t #t #f)
\defineBarLine ":;|!-c" #'(#t #t "||")
a1 \bar ":;|!-a"
b1 \bar ":;|!-b"
c1 \bar ":;|!-c"
d1
}
Since this is a single staff, I expected all these to appear the same.
But version "b" only uses the first character of the bartype argument.
I don't see this documented anywhere, and can't imagine a use-case.
Is it a bug?
-David
