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