Re: Jianpu Notation

[Paul Morris]

Hi Carl,

> On Apr 23, 2015, at 12:24 AM, Carl Sorensen <address@hidden> wrote:
> 
> On 4/22/15 8:59 PM, "Paul Morris" <address@hidden> wrote:
> 
>> P.S. In case anyone is wondering, in 2.18 the context property
>> łkeySignature" becomes łkeyAlterations" in 2.19.  I believe this was to
>> prevent confusion with the łKeySignature" grob.
> 
> If your code has version strings, convert-ly should automatically update
> it.

That’s good, but in order to have it work with both 2.18 and 2.19 I used a bit 
of a quick hack/workaround.  

Since trying ly:context-property with a non-existent property returns an empty 
list ‘() which is also a valid value for this context property (c major / a 
minor), it seems there’s no real way to check for the existence of this context 
property.  So my code checks one first, if it returns ‘() it also check the 
other, and that covers all possible cases.  

Better would be to have some code for checking the LilyPond version (like in 
openLilyLib).  But I was going for speed in this case.

-Paul