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