Modifying constructor for designor-sub structures.
(change-designor-sub x [:index <index>])
This is an often useful alternative to make-designor-sub.
We construct a new designor-sub structure that is a copy of
This is an ordinary
Macro:
(defmacro change-designor-sub (x &rest args) (std::change-aggregate 'designor-sub x args '((:index . designor-sub->index)) 'change-designor-sub 'nil))