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