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Re: Trying to evaluate a music expression in scheme

From: Nicolas Sceaux
Subject: Re: Trying to evaluate a music expression in scheme
Date: Sat, 21 Jun 2008 12:33:22 +0200

Le 19 juin 08 à 05:44, Carl D. Sorensen a écrit :

I need to know the name of the function to call so I can write something like this:

(load-predefined-diagram "\chordmode {c}" ((string-fret1) (string- fret2) (string-fret3) (string-fret4)))


(let ((notes (this-is-the-function-I-need "\chordmode{c}"))

will return the same list of note events as is passed to determine- frets, so I can use it as a hash-index
for writing the diagram to the hash table.

Does this-is-the-function-I-need exist? I have looked at ly:interpret-music-expression, but this looks like it's aimed at the top-level music expression. If the function does exist, what is it called? If it doesn't, can anybody give me a pointer as to where I might go to get some ideas about how to create it?

Usually, one have access to LilyPond syntax from scheme code
using the #{ #} construct.

(let ((music #{ \chordmode { c } #}))
   .. do something with music ..)

A `parser' object must exist where you use this code.

If this is not exactly what you're looking for, you may have a
look at scm/parser-ly-from-scheme.scm for inspiration.


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