Re: Issue 34 in lilypond: Grace synchronization

[David Kastrup]

"address@hidden" <address@hidden> writes:

> On Jul 21, 2011, at 11:10 AM, address@hidden wrote:
>> 
>> I think that is a promising approach.  I looked through the code
>> thinking about this issue two days ago, and began to look for a way
>> to default-initialize the grace_part_ of a Moment to something that
>> would sort before any defined value of grace_part_.  I do not know
>> enough Scheme to know if Rational grace_part_ = -1 / 0 is guaranteed
>> to work as -inf.
>> 
>
> I'm not sure if I completely get how you want to represent this value
> in Scheme, but typing -1/0 into the command line in guile will get you
> a numerical-overflow error.

Rational is not a native Scheme type but implemented in flower.
Rational grace_part_ = -1 / 0 most certainly will not work.

Rational grace_part_.set_infinite (-1)

should do.  When make-moment is called omitting the grace part of the
argument list, this should become the default.

-- 
David Kastrup