David, Thanks for this. I'm obviously going to have to dust off my LISP lectures from 1967!
Best regards, Peter mailto:lilyp...@ptoye.com www.ptoye.com ------------------------- Friday, December 20, 2019, 12:41:31 PM, David Kastrup wrote: > Peter Toye <lilyp...@ptoye.com> writes: >> Thee are many examples of the use of the make-music function in NR and >> Snippets, but I cannot find any reference to its definition in LR, NR >> or IR. I can use the examples to do what I want, but I'd like to know >> a bit more about how it works. Is there a definition of it and its >> parameters anywhere (apart from delving into the code)? > Sometimes delving in the code just to discover > comment strings/comments > is not the worst idea with LilyPond. > scm/define-music-types.scm: > (define-safe-public (make-music name . music-properties) > "Create a music object of given name, and set its properties > according to @code{music-properties}, a list of > alternating property symbols > and values. E.g: > @example > (make-music 'OverrideProperty > 'symbol 'Stem > 'grob-property 'thickness > 'grob-value (* 2 1.5)) > @end example > Instead of a successive symbol and value, an entry in the list may > also be an alist or a music object in which case its elements, > respectively its @emph{mutable} property list > (properties not inherent > to the type of the music object) will get taken. > The argument list will be interpreted > left-to-right, so later entries > override earlier ones."
