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