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