Thanks Aaron!
On Mon, 25 Jan 2021 at 15:54, Aaron Hill <lilyp...@hillvisions.com> wrote:
> Did you mean to attach or include a code snippet? Hard to spot any
> problem without it. :)
>
Oops, guilty as charged.
> Regardless, review the following:
>
> %%%%
> \version "2.22.0"
>
> valueOrDefault =
> #(define-scheme-function
> (module symbol default)
> ((module? (current-module)) symbol? scheme?)
> (module-ref module symbol default))
>
> defineOnce =
> #(define-void-function
> (module symbol value)
> ((module? (current-module)) symbol? scheme?)
> (or (module-defined? module symbol)
> (module-define! module symbol value)))
>
> {
> \valueOrDefault foo { b'1 }
> \defineOnce foo { b'4 4 2 }
> \valueOrDefault foo { b'1 }
> \defineOnce foo { b'8 8 2. }
> \foo
> }
> %%%%
>
That works well. I was tying my brain in knots thinking about symbols and
variables. Using the module definitions looks very robust.
Thanks again!
Vaughan
