Re: Can we use +nan.0?

[David Kastrup]

Han-Wen Nienhuys <address@hidden> writes:

> On Mon, Apr 4, 2011 at 3:15 PM, David Kastrup <address@hidden> wrote:
>>
>> Hi, I am trying to come up with an alteration value that does not match
>> "normal" alterations but is neither positive nor negative (since
>> otherwise a "change" will cause naturals to be printed).
>>
>> +nan.0 appears fine for that.  But can we rely on it being available on
>> supported platforms?  I don't find it in the sources of Lilypond, though
>
> It sounds a bit fishy especially since alterations are normally
> rational numbers.  Why not use a non-number value to signify this?
> Maybe #f ?

Because alterations are compared using `=' which bombs out on `#f'
(which was actually my first attempt).

-- 
David Kastrup