Re: problem with extending 'magnetic snapping lyrics' engraver

[Werner LEMBERG]

> It's uncomfortable to have grob properties of procedure type, since
> they are automatically resolved as callbacks.  You set
> LyricWord.hyphen-formatter to ly:lyric-hyphen::print.  Then, when
> you do
>
>   (ly:grob-property grob 'hyphen-formatter)
>
> this not only looks up ly:lyric-hyphen::print in the property, but
> executes it on the LyricWord and returns the result.  Since
> ly:lyric-hyphen::print is written to work on a LyricHyphen and not a
> LyricWord, it gives up and returns '().  Then you try to apply the
> "formatter" '() to the hyphen, which goes wrong.  You could use
> ly:grob-property-data, which skips callbacks, [...]

Thanks a lot for the explanation!

> but how about just
> changing
>
>    (let* ((hyphen-sten (ly:lyric-hyphen::print hyphen))
>
> to
>
>    (let* ((hyphen-sten (ly:grob-property hyphen 'stencil))
>
>
> ? Then you can do \override LyricHyphen.stencil = #what-you-want to
> get the result.

D'oh, so simple, thanks again!


    Werner