Re: music-to-markup

[Urs Liska]

Am 23.07.2014 21:54, schrieb Urs Liska:
> Am 23.07.2014 18:52, schrieb David Kastrup:
> > Urs Liska <address@hidden> writes:
> >
> > > is it possible to take a music expression and print out its literal
> > > input?
> >
> > Sort of.
> >
> > > In other words: Could I write a function "\example" that takes a music
> > > expression as an argument and that first outputs the input code as
> > > text and then as a score?
> > >
> > > So that
> > >
> > > \example {
> > >    \relative c' {
> > >      c8 d e
> > >    }
> > > }
> >
> > Well, if you write
> >
> > example =
> > #(make-scheme-function (parser location music) (ly:music)
> > ...
> > then (ly:input-both-locations location)
> > will return
> >
> > -- Function: ly:input-both-locations sip
> >       Return input location in SIP as ‘(file-name first-line first-column
> >       last-line last-column)’.
> >
> > So you'll be able to take the input location information and read the
> > corresponding source from the file.
>
> So you mean I should parse this (example result):
> (/tmp/frescobaldi-4Orug3/tmp8Y5V5X/document.ly 8 0 16 1)
>
> open the file (separately) from Scheme and read the given range?
> You're right, that looks somewhat awkward but whould give me a start.
>
> Thanks
> Urs


I think "give me a start" was quite right.

Scheme so often makes me feel stupid. Now I manage to open the file but 
I don't have any clue as to how to make its content available for 
processing. I'd think I'd read it line by line, discarding the leading 
and trailing lines outside the range, but I didn't manage to do anything 
so far.

Attached is a funny by-product. Just include "display-input-file" in a 
main file (or use the attached "show-file.ly") and watch the console 
output ;-) .

Best
Urs

show-file.ly
Description: Text Data

display-input-file.ily
Description: Text document