On Sun, Dec 14, 2008 at 12:43 PM, Neil Puttock
<address@hidden> wrote:
Hi John,
2008/12/14 John Mangual <address@hidden>:
> how would i go about looking up the scheme source code for a specific
> function like "transpose" or "tuple" or "key"
It depends on whether the function is a parser keyword or music
function; if it's the latter (you can check this by looking at
appendix B.14, Identifiers) then you're most likely to find it in
ly/music-functions-init.ly.
In the case of keywords, you'll have to follow the trail from the
parser. For example, here's the parser entry for \transpose:
| TRANSPOSE pitch_also_in_chords pitch_also_in_chords music {
Pitch from = *unsmob_pitch ($2);
Pitch to = *unsmob_pitch ($3);
SCM pitch = pitch_interval (from, to).smobbed_copy ();
$$ = MAKE_SYNTAX ("transpose-music", @$, pitch, $4);
}
The MAKE_SYNTAX macro calls the Scheme function transpose-music, which
you'll find in scm/ly-syntax-constructors.scm:
(define-ly-syntax-simple (transpose-music pitch music)
(make-music 'TransposedMusic
'element (ly:music-transpose music pitch)))
Regards,
Neil