On Wed, Mar 25, 2015 at 11:13 AM, David Nalesnik <david.nales...@gmail.com>
wrote:
> Hi again,
>
> On Wed, Mar 25, 2015 at 10:33 AM, David Nalesnik <david.nales...@gmail.com
> > wrote:
>
>> Hi Simon,
>>
>> I can't judge whether this is getting closer to you want, but maybe my
>> observations can help.
>>
>> On Wed, Mar 25, 2015 at 9:17 AM, Simon Albrecht <simon.albre...@mail.de>
>> wrote:
>>
>>> Hello,
>>>
>>> I’m experimenting with an implementation of automatic tagline language
>>> selection and currently have two problems with the void function \language
>>> that I adapted from music-functions-init.ly:
>>> – I can’t get the first, optional argument to work; it needs to be
>>> explicitly given or Lily will take the string as first argument – although
>>> it’s required to be a symbol.
>>>
>>
>> I haven't succeeded in making this work with the optional argument in the
>> first position. I moved it last. However, the last argument either must
>> be specified with a symbol or with \default. Otherwise, the following
>> expression will be taken as the argument and an error will be raised: in my
>> rewrite that is '#(newline)'.
>>
>>
> How about this? I'm viewing the first argument as a slot for either a
> symbol ('general and the like) or a string (the language name). The last
> argument is optional. I used the scheme? predicate to solve the lookahead
> problem. Anything will be taken, and it's up to the function to reject
> anything that's not a string. (Presumably, it's unlikely that you'd follow
> the music function with a string, but who knows...)
>
Oh, drat. That means that if you have
\language "deutsch"
{
c
}
The music expression is thrown away... You would need to save the value of
the last argument if not a string. This is getting too hairy. Unless
someone has a better idea, my final answer is my first post...
David
_______________________________________________
lilypond-user mailing list
lilypond-user@gnu.org
https://lists.gnu.org/mailman/listinfo/lilypond-user
