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