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