Re: Including tweaks in a variable

[Michael Stickles]

Jan-Peter,

Thanks. That was the correct idea. It was driving me crazy at first because it still wouldn't work, until I dug through the documentation a bit more and found that 2.18 and 2.19 have a slightly different syntax for the function arguments:

2.19
===
smNote = #(define-music-function
  (m)(ly:music?)
  #{
    \tweak font-size #-2 #m
  #}
)

2.18
===
smNote = #(define-music-function
  (parser location m)(ly:music?)
  #{
    \tweak font-size #-2 #m
  #}
)

After adding "parser location" to the start of the arguments section, it works perfectly. Thanks again!

---

From: "Jan-Peter Voigt" <address@hidden>
Sent: Thursday, March 01, 2018 10:43 AM
To: address@hidden
Subject: Re: Including tweaks in a variable

Hello Michael,

it works if you add \etc to the variable (in lily-dev 2.19.x IIRC):
smNote = \tweak font-size #-2 \etc
That way smNote becomes a music-function that takes the note as argument
and the tweak is applied.
If you are using 2.18 you have to create the function like this:
smNote = #(define-music-function (m)(ly:music?) #{ \tweak font-size #-2
#m #})

HTH
Jan-Peter

Am 01.03.2018 um 15:33 schrieb Michael Stickles:
> This should be simple, but I just can't seem to get it to work.  I'm
> working on re-doing a lot of our church music, and use variables
> extensively to help make the .ly files more readable. There are a lot
> of places where one vocal part splits and we want the "secondary"
> notes to be smaller, resulting in code like this:
>
> <f  \tweak font-size #-2  f,>1
>
> What I want to do is replace the "tweak" section with a variable, like
> this:
>
> smNote = \tweak font-size #-2
>
> <f  \smNote  f,>1
>
> But this results in errors:
>
> error: unknown escaped string: `\smNote'
> error: wrong type for argument 3.  Expecting symbol list or music,
> found #<Book>
>
> (the "smNote" definition is at the end of the variables section, and
> the first line after the variables section is "\book {" )
>
> Some online searching came up with a few suggestions, but none of them
> worked for me. Given that they worked for the original posters, I'd
> guess I implemented them incorrectly, but I can't figure out what I'm
> doing wrong. Ideas?
>
>
> _______________________________________________
> lilypond-user mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/lilypond-user


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