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