Re: 2.24 medium = \normal-weight in 2.26

On Thu, 2026-08-13 at 12:16 +0100, Richard Shann wrote:
> On Thu, 2026-08-13 at 11:05 +0200, Lukas-Fabian Moser wrote:
> > Hi Richard,
> > 
> > Am 13.08.26 um 10:55 schrieb Richard Shann:
> > > Is there a way of putting something like
> > >   medium = \normal-weight
> > > in a header file to convert from uses of \medium in markup in
> > > LilyPond
> > > 2.24 to pass 2.26 (so as to aviud going through physically
> > > replacing
> > > \medium with \normal-weight?)
> > > The above doesn't work, I guess because it's being invoked inside
> > > markup...
> > 
> > The syntax is a bit more complicated in the case of markup
> > functions:
> > 
> > \markup medium = \markup \normal-weight \etc
> 
> Perfect! Thank you very much.

I looked up the docs on using ly:version? to allow older files to be
typeset in older or newer syntax and I understood this should work:

#(if (ly:version? > '(2 24))
       #{ \markup medium = \markup \normal-weight \etc #})

but this seems not to work:
%%%%%%%%%%%%%%%%%%%%%%%%%%
\version "2.26"
%\version "2.24"
#(if (ly:version? > '(2 25))
       #{ \markup medium = \markup \normal-weight \etc #})
\score  {
         \new Staff { a'4 a' 
                         \mark \markup {\bold bold1 \medium med \bold
bold2}
                         a' a' 
         } 
}
%%%%%%%%%%%%%%%%%%%%%%%%%%
gives
\markup medium = \markup \normal-weight \etc 
/tmp/frescobaldi-oorxliqz/tmp7qct88s5/document.ly:4:17: error: syntax
error, unexpected '='

I didn't manage to nail down an explanation of #{ ... #} but it seemed
like it was for inserting LilyPond syntax at that point in the file.
Help much appreciated!

Richard