> Is there any way in Guile to have special code executed whenever a
> particular variable is set? I'm pretty sure there isn't, but I wanted
> to make sure.
There isn't.
> Such a thing would be useful for avoiding a lot of ad-hoc setter
> procedures in guile-based configuration languages where some immediate
> effect should take place when certain options are set,
This (the active variables) feels like an unschemey way of solving the
problem. Jim Blandy once suggested:
(icon-font font12)
to set the parameter `icon-font' and
(icon-font)
to get its value.
Best regards,
/mdj