Re: Odd interaction between ly:grob-property and hairpin

[Simon Albrecht]

Hi Aaron,

thanks a lot for the help! I knew that these pure vs. impure issues 
exist, but I’ve never been able to wrap my head around them and this is 
the first time I ever needed to account for them in practice.

Looking at Extending Manual section 2.8, it seems that Y-offset is 
likely to be affected, so that makes sense.

What I don’t quite get is the meaning of the ‘begin’ and ‘end’ 
parameters in ly:grob-pure-property, but as long as 0 0 works, I’m good 
;) (and it’s not a topic for the bug list)

Best, Simon

On 10/02/2022 03:29, Aaron Hill wrote:
> A pure vs. unpure issue perhaps?  If you use ly:grob-pure-property to 
> access it, it seems to work.