Re: Nesting ly:music-property error

[Michael Ellis]

Sorry, my previous answer was rubbish.  The following runs without
error and prints the pitch object.

myN = #(define-music-function (parser location myx ) (ly:music?)
    (display-scheme-music
    (ly:music-property
        (car (ly:music-property myx 'elements))
        'pitch))
    myx)

    \myN c

Cheers,
Mike



On Sat, Jan 29, 2011 at 6:46 PM, Michael Ellis
<address@hidden> wrote:
> Hi Scott,
>
> I think the problem is that the music in your example doesn't have an
> 'elements property.  You can eliminate the error by changing the third
> line in your code to
>
> #(display-scheme-music (ly:music-property $myx 'pitch))
>
> but what gets displayed is an empty list '().  Probably not what you
> want, right?
>
> Some of the more experienced Schemers on the list may be able to offer
> better help.
>
> Cheers,
> Mike
>
>
>
> On Sat, Jan 29, 2011 at 6:28 PM,  <address@hidden> wrote:
>> myN = #(define-music-function (parser location myx ) (ly:music?)
>> #{
>> #(display-scheme-music (ly:music-property (ly:music-property $myx 'elements)
>> 'pitch))
>> #})
>>
>>     \myN c
>