Re: \offset and mutable properties

[Simon Albrecht]

Am 22.07.2015 um 02:43 schrieb David Nalesnik:

On Tue, Jul 21, 2015 at 6:18 PM, Simon Albrecht <address@hidden> wrote:

So a ‘mutable property’ would be one that is unset by default?

My understanding is that immutable properties store default values--such as a procedure to be applied when calculating Stem.thickness or whatever, and immutable properties store the results of calculations for a particular instance of a grob--for example, the value obtained by applying the default procedure to a certain Stem.

These terms are defined here (a bit cryptically I think): http://lilypond.org/doc/v2.19/Documentation/notation/technical-glossary

Cryptically indeed :-)

  You'll note that each of the other properties you offset has a default value in scm/define-grobs.scm

As a side note: I find it confusing that these are not to be found in the IR.

But they are--for example, http://lilypond.org/doc/v2.19/Documentation/internals/dynamiclinespanner is built from the entry in scm/define-grobs.scm.

Where do I have my mind? …

Good night,
Simon