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