Dot-separated list as music function argument

[Simon Albrecht]

Hello everybody,

I just wrote a music function to mark grobs as editorial addition by colouring them grey. See the code and an example:

\version "2.19.8"

ed = #(let

((string-or-list?

(lambda (grob)

(or (string? grob)

(list? grob)))))

(define-music-function

(parser location grob mus)

(string-or-list? ly:music?)

#{ \override $grob . color = #(x11-color 'grey40)

$mus

\revert $grob . color #}

)

)

\relative { \ed NoteHead c' \ed #'(Staff Accidental) { cis dis } es }

%%%%%%%%%%%%%

The 2.18 changes document says that #'(Staff Accidental) and Staff.Accidental were now interchangeable, however if I replace it in the second function call, I get errors (unexpected "." etc.). Is there a way to avoid this in the coding of the function or should it be considered a bug?

Best regards,
Simon